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gerrit-public.fairphone.software / fp2-dev / platform / external / lldb / ae31fae5a3b818aaf6639f8ddcd07bb2fbd7d0dd / . / source / Expression / DWARFExpression.cpp
blob: a6950d6a5dc6b9ddeab0473c62d7858839fd7502 [file] [log] [blame]
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1//===-- DWARFExpression.cpp -------------------------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Expression/DWARFExpression.h"
11
12#include <vector>
13
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]14#include "lldb/Core/DataEncoder.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]15#include "lldb/Core/dwarf.h"
16#include "lldb/Core/Log.h"
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]17#include "lldb/Core/RegisterValue.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]18#include "lldb/Core/StreamString.h"
19#include "lldb/Core/Scalar.h"
20#include "lldb/Core/Value.h"
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]21#include "lldb/Core/VMRange.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]22
23#include "lldb/Expression/ClangExpressionDeclMap.h"
24#include "lldb/Expression/ClangExpressionVariable.h"
25
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]26#include "lldb/Host/Endian.h"
Jim Ingham8521b842011-12-01 03:01:30 +0000[diff] [blame]27#include "lldb/Host/Host.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]28
29#include "lldb/lldb-private-log.h"
30
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]31#include "lldb/Symbol/ClangASTType.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]32#include "lldb/Symbol/ClangASTContext.h"
33#include "lldb/Symbol/Type.h"
34
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]35#include "lldb/Target/ABI.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]36#include "lldb/Target/ExecutionContext.h"
37#include "lldb/Target/Process.h"
38#include "lldb/Target/RegisterContext.h"
39#include "lldb/Target/StackFrame.h"
40
41using namespace lldb;
42using namespace lldb_private;
43
44const char *
45DW_OP_value_to_name (uint32_t val)
46{
47 static char invalid[100];
48 switch (val) {
49 case 0x03: return "DW_OP_addr";
50 case 0x06: return "DW_OP_deref";
51 case 0x08: return "DW_OP_const1u";
52 case 0x09: return "DW_OP_const1s";
53 case 0x0a: return "DW_OP_const2u";
54 case 0x0b: return "DW_OP_const2s";
55 case 0x0c: return "DW_OP_const4u";
56 case 0x0d: return "DW_OP_const4s";
57 case 0x0e: return "DW_OP_const8u";
58 case 0x0f: return "DW_OP_const8s";
59 case 0x10: return "DW_OP_constu";
60 case 0x11: return "DW_OP_consts";
61 case 0x12: return "DW_OP_dup";
62 case 0x13: return "DW_OP_drop";
63 case 0x14: return "DW_OP_over";
64 case 0x15: return "DW_OP_pick";
65 case 0x16: return "DW_OP_swap";
66 case 0x17: return "DW_OP_rot";
67 case 0x18: return "DW_OP_xderef";
68 case 0x19: return "DW_OP_abs";
69 case 0x1a: return "DW_OP_and";
70 case 0x1b: return "DW_OP_div";
71 case 0x1c: return "DW_OP_minus";
72 case 0x1d: return "DW_OP_mod";
73 case 0x1e: return "DW_OP_mul";
74 case 0x1f: return "DW_OP_neg";
75 case 0x20: return "DW_OP_not";
76 case 0x21: return "DW_OP_or";
77 case 0x22: return "DW_OP_plus";
78 case 0x23: return "DW_OP_plus_uconst";
79 case 0x24: return "DW_OP_shl";
80 case 0x25: return "DW_OP_shr";
81 case 0x26: return "DW_OP_shra";
82 case 0x27: return "DW_OP_xor";
83 case 0x2f: return "DW_OP_skip";
84 case 0x28: return "DW_OP_bra";
85 case 0x29: return "DW_OP_eq";
86 case 0x2a: return "DW_OP_ge";
87 case 0x2b: return "DW_OP_gt";
88 case 0x2c: return "DW_OP_le";
89 case 0x2d: return "DW_OP_lt";
90 case 0x2e: return "DW_OP_ne";
91 case 0x30: return "DW_OP_lit0";
92 case 0x31: return "DW_OP_lit1";
93 case 0x32: return "DW_OP_lit2";
94 case 0x33: return "DW_OP_lit3";
95 case 0x34: return "DW_OP_lit4";
96 case 0x35: return "DW_OP_lit5";
97 case 0x36: return "DW_OP_lit6";
98 case 0x37: return "DW_OP_lit7";
99 case 0x38: return "DW_OP_lit8";
100 case 0x39: return "DW_OP_lit9";
101 case 0x3a: return "DW_OP_lit10";
102 case 0x3b: return "DW_OP_lit11";
103 case 0x3c: return "DW_OP_lit12";
104 case 0x3d: return "DW_OP_lit13";
105 case 0x3e: return "DW_OP_lit14";
106 case 0x3f: return "DW_OP_lit15";
107 case 0x40: return "DW_OP_lit16";
108 case 0x41: return "DW_OP_lit17";
109 case 0x42: return "DW_OP_lit18";
110 case 0x43: return "DW_OP_lit19";
111 case 0x44: return "DW_OP_lit20";
112 case 0x45: return "DW_OP_lit21";
113 case 0x46: return "DW_OP_lit22";
114 case 0x47: return "DW_OP_lit23";
115 case 0x48: return "DW_OP_lit24";
116 case 0x49: return "DW_OP_lit25";
117 case 0x4a: return "DW_OP_lit26";
118 case 0x4b: return "DW_OP_lit27";
119 case 0x4c: return "DW_OP_lit28";
120 case 0x4d: return "DW_OP_lit29";
121 case 0x4e: return "DW_OP_lit30";
122 case 0x4f: return "DW_OP_lit31";
123 case 0x50: return "DW_OP_reg0";
124 case 0x51: return "DW_OP_reg1";
125 case 0x52: return "DW_OP_reg2";
126 case 0x53: return "DW_OP_reg3";
127 case 0x54: return "DW_OP_reg4";
128 case 0x55: return "DW_OP_reg5";
129 case 0x56: return "DW_OP_reg6";
130 case 0x57: return "DW_OP_reg7";
131 case 0x58: return "DW_OP_reg8";
132 case 0x59: return "DW_OP_reg9";
133 case 0x5a: return "DW_OP_reg10";
134 case 0x5b: return "DW_OP_reg11";
135 case 0x5c: return "DW_OP_reg12";
136 case 0x5d: return "DW_OP_reg13";
137 case 0x5e: return "DW_OP_reg14";
138 case 0x5f: return "DW_OP_reg15";
139 case 0x60: return "DW_OP_reg16";
140 case 0x61: return "DW_OP_reg17";
141 case 0x62: return "DW_OP_reg18";
142 case 0x63: return "DW_OP_reg19";
143 case 0x64: return "DW_OP_reg20";
144 case 0x65: return "DW_OP_reg21";
145 case 0x66: return "DW_OP_reg22";
146 case 0x67: return "DW_OP_reg23";
147 case 0x68: return "DW_OP_reg24";
148 case 0x69: return "DW_OP_reg25";
149 case 0x6a: return "DW_OP_reg26";
150 case 0x6b: return "DW_OP_reg27";
151 case 0x6c: return "DW_OP_reg28";
152 case 0x6d: return "DW_OP_reg29";
153 case 0x6e: return "DW_OP_reg30";
154 case 0x6f: return "DW_OP_reg31";
155 case 0x70: return "DW_OP_breg0";
156 case 0x71: return "DW_OP_breg1";
157 case 0x72: return "DW_OP_breg2";
158 case 0x73: return "DW_OP_breg3";
159 case 0x74: return "DW_OP_breg4";
160 case 0x75: return "DW_OP_breg5";
161 case 0x76: return "DW_OP_breg6";
162 case 0x77: return "DW_OP_breg7";
163 case 0x78: return "DW_OP_breg8";
164 case 0x79: return "DW_OP_breg9";
165 case 0x7a: return "DW_OP_breg10";
166 case 0x7b: return "DW_OP_breg11";
167 case 0x7c: return "DW_OP_breg12";
168 case 0x7d: return "DW_OP_breg13";
169 case 0x7e: return "DW_OP_breg14";
170 case 0x7f: return "DW_OP_breg15";
171 case 0x80: return "DW_OP_breg16";
172 case 0x81: return "DW_OP_breg17";
173 case 0x82: return "DW_OP_breg18";
174 case 0x83: return "DW_OP_breg19";
175 case 0x84: return "DW_OP_breg20";
176 case 0x85: return "DW_OP_breg21";
177 case 0x86: return "DW_OP_breg22";
178 case 0x87: return "DW_OP_breg23";
179 case 0x88: return "DW_OP_breg24";
180 case 0x89: return "DW_OP_breg25";
181 case 0x8a: return "DW_OP_breg26";
182 case 0x8b: return "DW_OP_breg27";
183 case 0x8c: return "DW_OP_breg28";
184 case 0x8d: return "DW_OP_breg29";
185 case 0x8e: return "DW_OP_breg30";
186 case 0x8f: return "DW_OP_breg31";
187 case 0x90: return "DW_OP_regx";
188 case 0x91: return "DW_OP_fbreg";
189 case 0x92: return "DW_OP_bregx";
190 case 0x93: return "DW_OP_piece";
191 case 0x94: return "DW_OP_deref_size";
192 case 0x95: return "DW_OP_xderef_size";
193 case 0x96: return "DW_OP_nop";
194 case 0x97: return "DW_OP_push_object_address";
195 case 0x98: return "DW_OP_call2";
196 case 0x99: return "DW_OP_call4";
197 case 0x9a: return "DW_OP_call_ref";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]198// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
199// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]200 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]201// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
202// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
203// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
204// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
205// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
206// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
207// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
208// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
209// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
210// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]211 default:
212 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
213 return invalid;
214 }
215}
216
217
218//----------------------------------------------------------------------
219// DWARFExpression constructor
220//----------------------------------------------------------------------
221DWARFExpression::DWARFExpression() :
222 m_data(),
223 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]224 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]225{
226}
227
228DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
229 m_data(rhs.m_data),
230 m_reg_kind (rhs.m_reg_kind),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]231 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]232{
233}
234
235
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]236DWARFExpression::DWARFExpression(const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length) :
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]237 m_data(data, data_offset, data_length),
238 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]239 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]240{
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]241}
242
243//----------------------------------------------------------------------
244// Destructor
245//----------------------------------------------------------------------
246DWARFExpression::~DWARFExpression()
247{
248}
249
250
251bool
252DWARFExpression::IsValid() const
253{
254 return m_data.GetByteSize() > 0;
255}
256
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]257void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]258DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]259{
260 m_data = data;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]261}
262
263void
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]264DWARFExpression::CopyOpcodeData (const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Greg Clayton4fa86fe2012-08-10 23:33:27 +0000[diff] [blame]265{
266 const uint8_t *bytes = data.PeekData(data_offset, data_length);
Greg Claytoncaddaf42012-08-11 00:49:14 +0000[diff] [blame]267 if (bytes)
268 {
269 m_data.SetData(DataBufferSP(new DataBufferHeap(bytes, data_length)));
270 m_data.SetByteOrder(data.GetByteOrder());
271 m_data.SetAddressByteSize(data.GetAddressByteSize());
272 }
Greg Clayton4fa86fe2012-08-10 23:33:27 +0000[diff] [blame]273}
274
275void
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]276DWARFExpression::SetOpcodeData (const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]277{
278 m_data.SetData(data, data_offset, data_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]279}
280
281void
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]282DWARFExpression::DumpLocation (Stream *s, lldb::offset_t offset, lldb::offset_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]283{
284 if (!m_data.ValidOffsetForDataOfSize(offset, length))
285 return;
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]286 const lldb::offset_t start_offset = offset;
287 const lldb::offset_t end_offset = offset + length;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]288 while (m_data.ValidOffset(offset) && offset < end_offset)
289 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]290 const lldb::offset_t op_offset = offset;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]291 const uint8_t op = m_data.GetU8(&offset);
292
293 switch (level)
294 {
Greg Clayton54e7afa2010-07-09 20:39:50 +0000[diff] [blame]295 default:
296 break;
297
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]298 case lldb::eDescriptionLevelBrief:
299 if (offset > start_offset)
300 s->PutChar(' ');
301 break;
302
303 case lldb::eDescriptionLevelFull:
304 case lldb::eDescriptionLevelVerbose:
305 if (offset > start_offset)
306 s->EOL();
307 s->Indent();
308 if (level == lldb::eDescriptionLevelFull)
309 break;
310 // Fall through for verbose and print offset and DW_OP prefix..
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]311 s->Printf("0x%8.8" PRIx64 ": %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]312 break;
313 }
314
315 switch (op)
316 {
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]317 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
318 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
319 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
320 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
321 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
322 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
323 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
324 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]325 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
326 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
327 case DW_OP_constu: s->Printf("DW_OP_constu(0x%" PRIx64 ") ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
328 case DW_OP_consts: s->Printf("DW_OP_consts(0x%" PRId64 ") ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]329 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
330 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
331 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
332 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
333 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
334 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
335 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
336 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
337 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
338 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
339 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
340 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
341 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
342 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
343 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
344 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
345 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]346 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]347 s->Printf("DW_OP_plus_uconst(0x%" PRIx64 ") ", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]348 break;
349
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]350 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
351 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
352 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
353 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
354 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
355 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
356 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
357 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
358 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
359 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
360 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
361 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]362
363 case DW_OP_lit0: // 0x30
364 case DW_OP_lit1: // 0x31
365 case DW_OP_lit2: // 0x32
366 case DW_OP_lit3: // 0x33
367 case DW_OP_lit4: // 0x34
368 case DW_OP_lit5: // 0x35
369 case DW_OP_lit6: // 0x36
370 case DW_OP_lit7: // 0x37
371 case DW_OP_lit8: // 0x38
372 case DW_OP_lit9: // 0x39
373 case DW_OP_lit10: // 0x3A
374 case DW_OP_lit11: // 0x3B
375 case DW_OP_lit12: // 0x3C
376 case DW_OP_lit13: // 0x3D
377 case DW_OP_lit14: // 0x3E
378 case DW_OP_lit15: // 0x3F
379 case DW_OP_lit16: // 0x40
380 case DW_OP_lit17: // 0x41
381 case DW_OP_lit18: // 0x42
382 case DW_OP_lit19: // 0x43
383 case DW_OP_lit20: // 0x44
384 case DW_OP_lit21: // 0x45
385 case DW_OP_lit22: // 0x46
386 case DW_OP_lit23: // 0x47
387 case DW_OP_lit24: // 0x48
388 case DW_OP_lit25: // 0x49
389 case DW_OP_lit26: // 0x4A
390 case DW_OP_lit27: // 0x4B
391 case DW_OP_lit28: // 0x4C
392 case DW_OP_lit29: // 0x4D
393 case DW_OP_lit30: // 0x4E
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]394 case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]395
396 case DW_OP_reg0: // 0x50
397 case DW_OP_reg1: // 0x51
398 case DW_OP_reg2: // 0x52
399 case DW_OP_reg3: // 0x53
400 case DW_OP_reg4: // 0x54
401 case DW_OP_reg5: // 0x55
402 case DW_OP_reg6: // 0x56
403 case DW_OP_reg7: // 0x57
404 case DW_OP_reg8: // 0x58
405 case DW_OP_reg9: // 0x59
406 case DW_OP_reg10: // 0x5A
407 case DW_OP_reg11: // 0x5B
408 case DW_OP_reg12: // 0x5C
409 case DW_OP_reg13: // 0x5D
410 case DW_OP_reg14: // 0x5E
411 case DW_OP_reg15: // 0x5F
412 case DW_OP_reg16: // 0x60
413 case DW_OP_reg17: // 0x61
414 case DW_OP_reg18: // 0x62
415 case DW_OP_reg19: // 0x63
416 case DW_OP_reg20: // 0x64
417 case DW_OP_reg21: // 0x65
418 case DW_OP_reg22: // 0x66
419 case DW_OP_reg23: // 0x67
420 case DW_OP_reg24: // 0x68
421 case DW_OP_reg25: // 0x69
422 case DW_OP_reg26: // 0x6A
423 case DW_OP_reg27: // 0x6B
424 case DW_OP_reg28: // 0x6C
425 case DW_OP_reg29: // 0x6D
426 case DW_OP_reg30: // 0x6E
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]427 case DW_OP_reg31: // 0x6F
428 {
429 uint32_t reg_num = op - DW_OP_reg0;
430 if (abi)
431 {
432 RegisterInfo reg_info;
433 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
434 {
435 if (reg_info.name)
436 {
437 s->PutCString (reg_info.name);
438 break;
439 }
440 else if (reg_info.alt_name)
441 {
442 s->PutCString (reg_info.alt_name);
443 break;
444 }
445 }
446 }
447 s->Printf("DW_OP_reg%u", reg_num); break;
448 }
449 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]450
451 case DW_OP_breg0:
452 case DW_OP_breg1:
453 case DW_OP_breg2:
454 case DW_OP_breg3:
455 case DW_OP_breg4:
456 case DW_OP_breg5:
457 case DW_OP_breg6:
458 case DW_OP_breg7:
459 case DW_OP_breg8:
460 case DW_OP_breg9:
461 case DW_OP_breg10:
462 case DW_OP_breg11:
463 case DW_OP_breg12:
464 case DW_OP_breg13:
465 case DW_OP_breg14:
466 case DW_OP_breg15:
467 case DW_OP_breg16:
468 case DW_OP_breg17:
469 case DW_OP_breg18:
470 case DW_OP_breg19:
471 case DW_OP_breg20:
472 case DW_OP_breg21:
473 case DW_OP_breg22:
474 case DW_OP_breg23:
475 case DW_OP_breg24:
476 case DW_OP_breg25:
477 case DW_OP_breg26:
478 case DW_OP_breg27:
479 case DW_OP_breg28:
480 case DW_OP_breg29:
481 case DW_OP_breg30:
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]482 case DW_OP_breg31:
483 {
484 uint32_t reg_num = op - DW_OP_breg0;
485 int64_t reg_offset = m_data.GetSLEB128(&offset);
486 if (abi)
487 {
488 RegisterInfo reg_info;
489 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
490 {
491 if (reg_info.name)
492 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]493 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]494 break;
495 }
496 else if (reg_info.alt_name)
497 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]498 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]499 break;
500 }
501 }
502 }
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]503 s->Printf("DW_OP_breg%i(0x%" PRIx64 ")", reg_num, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]504 }
505 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]506
507 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]508 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]509 uint32_t reg_num = m_data.GetULEB128(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]510 if (abi)
511 {
512 RegisterInfo reg_info;
513 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
514 {
515 if (reg_info.name)
516 {
517 s->PutCString (reg_info.name);
518 break;
519 }
520 else if (reg_info.alt_name)
521 {
522 s->PutCString (reg_info.alt_name);
523 break;
524 }
525 }
526 }
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]527 s->Printf("DW_OP_regx(%" PRIu32 ")", reg_num); break;
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]528 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]529 break;
530 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]531 s->Printf("DW_OP_fbreg(%" PRIi64 ")",m_data.GetSLEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]532 break;
533 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]534 {
535 uint32_t reg_num = m_data.GetULEB128(&offset);
536 int64_t reg_offset = m_data.GetSLEB128(&offset);
537 if (abi)
538 {
539 RegisterInfo reg_info;
540 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
541 {
542 if (reg_info.name)
543 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]544 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]545 break;
546 }
547 else if (reg_info.alt_name)
548 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]549 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]550 break;
551 }
552 }
553 }
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]554 s->Printf("DW_OP_bregx(reg=%" PRIu32 ",offset=%" PRIi64 ")", reg_num, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]555 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]556 break;
557 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]558 s->Printf("DW_OP_piece(0x%" PRIx64 ")", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]559 break;
560 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]561 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]562 break;
563 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]564 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]565 break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]566 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
567 case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]568 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]569 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]570 break;
571 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]572 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]573 break;
574 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]575 s->Printf("DW_OP_call_ref(0x%8.8" PRIx64 ")", m_data.GetAddress(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]576 break;
577// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
578// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
579// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]580// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]581// break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]582// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
583// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]584// case DW_OP_APPLE_extern:
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]585// s->Printf("DW_OP_APPLE_extern(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]586// break;
587// case DW_OP_APPLE_array_ref:
588// s->PutCString("DW_OP_APPLE_array_ref");
589// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]590 case DW_OP_APPLE_uninit:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]591 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]592 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]593// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
594// s->PutCString("DW_OP_APPLE_assign");
595// break;
596// case DW_OP_APPLE_address_of: // 0xF2 - gets the address of the top stack item (top item must be a variable, or have value_type that is an address already)
597// s->PutCString("DW_OP_APPLE_address_of");
598// break;
599// case DW_OP_APPLE_value_of: // 0xF3 - pops the value off the stack and pushes the value of that object (top item must be a variable, or expression local)
600// s->PutCString("DW_OP_APPLE_value_of");
601// break;
602// case DW_OP_APPLE_deref_type: // 0xF4 - gets the address of the top stack item (top item must be a variable, or a clang type)
603// s->PutCString("DW_OP_APPLE_deref_type");
604// break;
605// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]606// s->Printf("DW_OP_APPLE_expr_local(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]607// break;
608// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
609// {
610// uint8_t float_length = m_data.GetU8(&offset);
611// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
612// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
613// s->PutChar(')');
614// // Consume the float data
615// m_data.GetData(&offset, float_length);
616// }
617// break;
618// case DW_OP_APPLE_scalar_cast:
619// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
620// break;
621// case DW_OP_APPLE_clang_cast:
622// {
623// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
624// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
625// }
626// break;
627// case DW_OP_APPLE_clear:
628// s->PutCString("DW_OP_APPLE_clear");
629// break;
630// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
631// s->PutCString("DW_OP_APPLE_error");
632// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]633 }
634 }
635}
636
637void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]638DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]639{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]640 m_loclist_slide = slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]641}
642
643int
644DWARFExpression::GetRegisterKind ()
645{
646 return m_reg_kind;
647}
648
649void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]650DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]651{
652 m_reg_kind = reg_kind;
653}
654
655bool
656DWARFExpression::IsLocationList() const
657{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]658 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]659}
660
661void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]662DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]663{
664 if (IsLocationList())
665 {
666 // We have a location list
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]667 lldb::offset_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]668 uint32_t count = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]669 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]670 while (m_data.ValidOffset(offset))
671 {
672 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
673 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
674 if (begin_addr_offset < end_addr_offset)
675 {
676 if (count > 0)
677 s->PutCString(", ");
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]678 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
679 addr_range.Dump(s, 0, 8);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]680 s->PutChar('{');
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]681 lldb::offset_t location_length = m_data.GetU16(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]682 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]683 s->PutChar('}');
684 offset += location_length;
685 }
686 else if (begin_addr_offset == 0 && end_addr_offset == 0)
687 {
688 // The end of the location list is marked by both the start and end offset being zero
689 break;
690 }
691 else
692 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]693 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
694 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]695 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]696 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]697 // We have a new base address
698 if (count > 0)
699 s->PutCString(", ");
700 *s << "base_addr = " << end_addr_offset;
701 }
702 }
703
704 count++;
705 }
706 }
707 else
708 {
709 // We have a normal location that contains DW_OP location opcodes
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]710 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]711 }
712}
713
714static bool
715ReadRegisterValueAsScalar
716(
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]717 RegisterContext *reg_ctx,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]718 uint32_t reg_kind,
719 uint32_t reg_num,
720 Error *error_ptr,
721 Value &value
722)
723{
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]724 if (reg_ctx == NULL)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]725 {
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]726 if (error_ptr)
727 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]728 }
729 else
730 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]731 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]732 if (native_reg == LLDB_INVALID_REGNUM)
733 {
734 if (error_ptr)
735 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
736 }
737 else
738 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]739 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
740 RegisterValue reg_value;
741 if (reg_ctx->ReadRegister (reg_info, reg_value))
742 {
743 if (reg_value.GetScalarValue(value.GetScalar()))
744 {
745 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]746 value.SetContext (Value::eContextTypeRegisterInfo,
747 const_cast<RegisterInfo *>(reg_info));
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]748 if (error_ptr)
749 error_ptr->Clear();
750 return true;
751 }
752 else
753 {
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]754 // If we get this error, then we need to implement a value
755 // buffer in the dwarf expression evaluation function...
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]756 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]757 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
758 reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]759 }
760 }
761 else
762 {
763 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]764 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]765 }
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]766 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]767 }
768 return false;
769}
770
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]771//bool
772//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
773//{
774// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
775//}
776//
777//bool
778//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
779//{
780// if (load_addr == LLDB_INVALID_ADDRESS)
781// return false;
782//
783// if (IsLocationList())
784// {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]785// lldb::offset_t offset = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]786//
787// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
788//
789// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
790// return false;
791//
792// while (m_data.ValidOffset(offset))
793// {
794// // We need to figure out what the value is for the location.
795// addr_t lo_pc = m_data.GetAddress(&offset);
796// addr_t hi_pc = m_data.GetAddress(&offset);
797// if (lo_pc == 0 && hi_pc == 0)
798// break;
799// else
800// {
801// lo_pc += loc_list_base_addr;
802// hi_pc += loc_list_base_addr;
803//
804// if (lo_pc <= load_addr && load_addr < hi_pc)
805// return true;
806//
807// offset += m_data.GetU16(&offset);
808// }
809// }
810// }
811// return false;
812//}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]813
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]814static offset_t
815GetOpcodeDataSize (const DataExtractor &data, const lldb::offset_t data_offset, const uint8_t op)
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]816{
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]817 lldb::offset_t offset = data_offset;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]818 switch (op)
819 {
820 case DW_OP_addr:
821 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
822 return data.GetAddressByteSize();
823
824 // Opcodes with no arguments
825 case DW_OP_deref: // 0x06
826 case DW_OP_dup: // 0x12
827 case DW_OP_drop: // 0x13
828 case DW_OP_over: // 0x14
829 case DW_OP_swap: // 0x16
830 case DW_OP_rot: // 0x17
831 case DW_OP_xderef: // 0x18
832 case DW_OP_abs: // 0x19
833 case DW_OP_and: // 0x1a
834 case DW_OP_div: // 0x1b
835 case DW_OP_minus: // 0x1c
836 case DW_OP_mod: // 0x1d
837 case DW_OP_mul: // 0x1e
838 case DW_OP_neg: // 0x1f
839 case DW_OP_not: // 0x20
840 case DW_OP_or: // 0x21
841 case DW_OP_plus: // 0x22
842 case DW_OP_shl: // 0x24
843 case DW_OP_shr: // 0x25
844 case DW_OP_shra: // 0x26
845 case DW_OP_xor: // 0x27
846 case DW_OP_eq: // 0x29
847 case DW_OP_ge: // 0x2a
848 case DW_OP_gt: // 0x2b
849 case DW_OP_le: // 0x2c
850 case DW_OP_lt: // 0x2d
851 case DW_OP_ne: // 0x2e
852 case DW_OP_lit0: // 0x30
853 case DW_OP_lit1: // 0x31
854 case DW_OP_lit2: // 0x32
855 case DW_OP_lit3: // 0x33
856 case DW_OP_lit4: // 0x34
857 case DW_OP_lit5: // 0x35
858 case DW_OP_lit6: // 0x36
859 case DW_OP_lit7: // 0x37
860 case DW_OP_lit8: // 0x38
861 case DW_OP_lit9: // 0x39
862 case DW_OP_lit10: // 0x3A
863 case DW_OP_lit11: // 0x3B
864 case DW_OP_lit12: // 0x3C
865 case DW_OP_lit13: // 0x3D
866 case DW_OP_lit14: // 0x3E
867 case DW_OP_lit15: // 0x3F
868 case DW_OP_lit16: // 0x40
869 case DW_OP_lit17: // 0x41
870 case DW_OP_lit18: // 0x42
871 case DW_OP_lit19: // 0x43
872 case DW_OP_lit20: // 0x44
873 case DW_OP_lit21: // 0x45
874 case DW_OP_lit22: // 0x46
875 case DW_OP_lit23: // 0x47
876 case DW_OP_lit24: // 0x48
877 case DW_OP_lit25: // 0x49
878 case DW_OP_lit26: // 0x4A
879 case DW_OP_lit27: // 0x4B
880 case DW_OP_lit28: // 0x4C
881 case DW_OP_lit29: // 0x4D
882 case DW_OP_lit30: // 0x4E
883 case DW_OP_lit31: // 0x4f
884 case DW_OP_reg0: // 0x50
885 case DW_OP_reg1: // 0x51
886 case DW_OP_reg2: // 0x52
887 case DW_OP_reg3: // 0x53
888 case DW_OP_reg4: // 0x54
889 case DW_OP_reg5: // 0x55
890 case DW_OP_reg6: // 0x56
891 case DW_OP_reg7: // 0x57
892 case DW_OP_reg8: // 0x58
893 case DW_OP_reg9: // 0x59
894 case DW_OP_reg10: // 0x5A
895 case DW_OP_reg11: // 0x5B
896 case DW_OP_reg12: // 0x5C
897 case DW_OP_reg13: // 0x5D
898 case DW_OP_reg14: // 0x5E
899 case DW_OP_reg15: // 0x5F
900 case DW_OP_reg16: // 0x60
901 case DW_OP_reg17: // 0x61
902 case DW_OP_reg18: // 0x62
903 case DW_OP_reg19: // 0x63
904 case DW_OP_reg20: // 0x64
905 case DW_OP_reg21: // 0x65
906 case DW_OP_reg22: // 0x66
907 case DW_OP_reg23: // 0x67
908 case DW_OP_reg24: // 0x68
909 case DW_OP_reg25: // 0x69
910 case DW_OP_reg26: // 0x6A
911 case DW_OP_reg27: // 0x6B
912 case DW_OP_reg28: // 0x6C
913 case DW_OP_reg29: // 0x6D
914 case DW_OP_reg30: // 0x6E
915 case DW_OP_reg31: // 0x6F
916 case DW_OP_nop: // 0x96
917 case DW_OP_push_object_address: // 0x97 DWARF3
918 case DW_OP_form_tls_address: // 0x9b DWARF3
919 case DW_OP_call_frame_cfa: // 0x9c DWARF3
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]920 case DW_OP_stack_value: // 0x9f DWARF4
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]921 return 0;
922
923 // Opcodes with a single 1 byte arguments
924 case DW_OP_const1u: // 0x08 1 1-byte constant
925 case DW_OP_const1s: // 0x09 1 1-byte constant
926 case DW_OP_pick: // 0x15 1 1-byte stack index
927 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
928 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
929 return 1;
930
931 // Opcodes with a single 2 byte arguments
932 case DW_OP_const2u: // 0x0a 1 2-byte constant
933 case DW_OP_const2s: // 0x0b 1 2-byte constant
934 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
935 case DW_OP_bra: // 0x28 1 signed 2-byte constant
936 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
937 return 2;
938
939 // Opcodes with a single 4 byte arguments
940 case DW_OP_const4u: // 0x0c 1 4-byte constant
941 case DW_OP_const4s: // 0x0d 1 4-byte constant
942 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
943 return 4;
944
945 // Opcodes with a single 8 byte arguments
946 case DW_OP_const8u: // 0x0e 1 8-byte constant
947 case DW_OP_const8s: // 0x0f 1 8-byte constant
948 return 8;
949
950 // All opcodes that have a single ULEB (signed or unsigned) argument
951 case DW_OP_constu: // 0x10 1 ULEB128 constant
952 case DW_OP_consts: // 0x11 1 SLEB128 constant
953 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
954 case DW_OP_breg0: // 0x70 1 ULEB128 register
955 case DW_OP_breg1: // 0x71 1 ULEB128 register
956 case DW_OP_breg2: // 0x72 1 ULEB128 register
957 case DW_OP_breg3: // 0x73 1 ULEB128 register
958 case DW_OP_breg4: // 0x74 1 ULEB128 register
959 case DW_OP_breg5: // 0x75 1 ULEB128 register
960 case DW_OP_breg6: // 0x76 1 ULEB128 register
961 case DW_OP_breg7: // 0x77 1 ULEB128 register
962 case DW_OP_breg8: // 0x78 1 ULEB128 register
963 case DW_OP_breg9: // 0x79 1 ULEB128 register
964 case DW_OP_breg10: // 0x7a 1 ULEB128 register
965 case DW_OP_breg11: // 0x7b 1 ULEB128 register
966 case DW_OP_breg12: // 0x7c 1 ULEB128 register
967 case DW_OP_breg13: // 0x7d 1 ULEB128 register
968 case DW_OP_breg14: // 0x7e 1 ULEB128 register
969 case DW_OP_breg15: // 0x7f 1 ULEB128 register
970 case DW_OP_breg16: // 0x80 1 ULEB128 register
971 case DW_OP_breg17: // 0x81 1 ULEB128 register
972 case DW_OP_breg18: // 0x82 1 ULEB128 register
973 case DW_OP_breg19: // 0x83 1 ULEB128 register
974 case DW_OP_breg20: // 0x84 1 ULEB128 register
975 case DW_OP_breg21: // 0x85 1 ULEB128 register
976 case DW_OP_breg22: // 0x86 1 ULEB128 register
977 case DW_OP_breg23: // 0x87 1 ULEB128 register
978 case DW_OP_breg24: // 0x88 1 ULEB128 register
979 case DW_OP_breg25: // 0x89 1 ULEB128 register
980 case DW_OP_breg26: // 0x8a 1 ULEB128 register
981 case DW_OP_breg27: // 0x8b 1 ULEB128 register
982 case DW_OP_breg28: // 0x8c 1 ULEB128 register
983 case DW_OP_breg29: // 0x8d 1 ULEB128 register
984 case DW_OP_breg30: // 0x8e 1 ULEB128 register
985 case DW_OP_breg31: // 0x8f 1 ULEB128 register
986 case DW_OP_regx: // 0x90 1 ULEB128 register
987 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
988 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
989 data.Skip_LEB128(&offset);
990 return offset - data_offset;
991
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]992 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]993 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
994 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
995 data.Skip_LEB128(&offset);
996 data.Skip_LEB128(&offset);
997 return offset - data_offset;
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]998
999 case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
1000 {
1001 uint64_t block_len = data.Skip_LEB128(&offset);
1002 offset += block_len;
1003 return offset - data_offset;
1004 }
1005
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1006 default:
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1007 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1008 }
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1009 return LLDB_INVALID_OFFSET;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1010}
1011
Greg Clayton464a5062013-03-04 21:46:16 +0000[diff] [blame]1012lldb::addr_t
1013DWARFExpression::GetLocation_DW_OP_addr (uint32_t op_addr_idx, bool &error) const
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1014{
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1015 error = false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1016 if (IsLocationList())
Greg Clayton464a5062013-03-04 21:46:16 +0000[diff] [blame]1017 return LLDB_INVALID_ADDRESS;
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1018 lldb::offset_t offset = 0;
Greg Clayton464a5062013-03-04 21:46:16 +0000[diff] [blame]1019 uint32_t curr_op_addr_idx = 0;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1020 while (m_data.ValidOffset(offset))
1021 {
1022 const uint8_t op = m_data.GetU8(&offset);
1023
1024 if (op == DW_OP_addr)
1025 {
Greg Clayton464a5062013-03-04 21:46:16 +0000[diff] [blame]1026 const lldb::addr_t op_file_addr = m_data.GetAddress(&offset);
1027 if (curr_op_addr_idx == op_addr_idx)
1028 return op_file_addr;
1029 else
1030 ++curr_op_addr_idx;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1031 }
1032 else
1033 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1034 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1035 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1036 {
1037 error = true;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1038 break;
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1039 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1040 offset += op_arg_size;
1041 }
1042 }
Greg Clayton464a5062013-03-04 21:46:16 +0000[diff] [blame]1043 return LLDB_INVALID_ADDRESS;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1044}
1045
1046bool
1047DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1048{
1049 if (IsLocationList())
1050 return false;
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1051 lldb::offset_t offset = 0;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1052 while (m_data.ValidOffset(offset))
1053 {
1054 const uint8_t op = m_data.GetU8(&offset);
1055
1056 if (op == DW_OP_addr)
1057 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1058 const uint32_t addr_byte_size = m_data.GetAddressByteSize();
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1059 // We have to make a copy of the data as we don't know if this
1060 // data is from a read only memory mapped buffer, so we duplicate
1061 // all of the data first, then modify it, and if all goes well,
1062 // we then replace the data for this expression
1063
1064 // So first we copy the data into a heap buffer
1065 std::auto_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
1066 m_data.GetByteSize()));
1067
1068 // Make en encoder so we can write the address into the buffer using
1069 // the correct byte order (endianness)
1070 DataEncoder encoder (head_data_ap->GetBytes(),
1071 head_data_ap->GetByteSize(),
1072 m_data.GetByteOrder(),
1073 addr_byte_size);
1074
1075 // Replace the address in the new buffer
1076 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1077 return false;
1078
1079 // All went well, so now we can reset the data using a shared
1080 // pointer to the heap data so "m_data" will now correctly
1081 // manage the heap data.
1082 m_data.SetData (DataBufferSP (head_data_ap.release()));
1083 return true;
1084 }
1085 else
1086 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1087 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1088 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1089 break;
1090 offset += op_arg_size;
1091 }
1092 }
1093 return false;
1094}
1095
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1096bool
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1097DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1098{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1099 if (addr == LLDB_INVALID_ADDRESS)
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1100 return false;
1101
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1102 if (IsLocationList())
1103 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1104 lldb::offset_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1105
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1106 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1107 return false;
1108
1109 while (m_data.ValidOffset(offset))
1110 {
1111 // We need to figure out what the value is for the location.
1112 addr_t lo_pc = m_data.GetAddress(&offset);
1113 addr_t hi_pc = m_data.GetAddress(&offset);
1114 if (lo_pc == 0 && hi_pc == 0)
1115 break;
1116 else
1117 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1118 lo_pc += loclist_base_addr - m_loclist_slide;
1119 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1120
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1121 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1122 return true;
1123
1124 offset += m_data.GetU16(&offset);
1125 }
1126 }
1127 }
1128 return false;
1129}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1130
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1131bool
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1132DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, lldb::offset_t &offset, lldb::offset_t &length)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1133{
1134 offset = 0;
1135 if (!IsLocationList())
1136 {
1137 length = m_data.GetByteSize();
1138 return true;
1139 }
1140
1141 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1142 {
1143 addr_t curr_base_addr = base_addr;
1144
1145 while (m_data.ValidOffset(offset))
1146 {
1147 // We need to figure out what the value is for the location.
1148 addr_t lo_pc = m_data.GetAddress(&offset);
1149 addr_t hi_pc = m_data.GetAddress(&offset);
1150 if (lo_pc == 0 && hi_pc == 0)
1151 {
1152 break;
1153 }
1154 else
1155 {
1156 lo_pc += curr_base_addr - m_loclist_slide;
1157 hi_pc += curr_base_addr - m_loclist_slide;
1158
1159 length = m_data.GetU16(&offset);
1160
1161 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1162 return true;
1163
1164 offset += length;
1165 }
1166 }
1167 }
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1168 offset = LLDB_INVALID_OFFSET;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1169 length = 0;
1170 return false;
1171}
1172
1173bool
1174DWARFExpression::DumpLocationForAddress (Stream *s,
1175 lldb::DescriptionLevel level,
1176 addr_t base_addr,
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1177 addr_t address,
1178 ABI *abi)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1179{
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1180 lldb::offset_t offset = 0;
1181 lldb::offset_t length = 0;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1182
1183 if (GetLocation (base_addr, address, offset, length))
1184 {
1185 if (length > 0)
1186 {
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1187 DumpLocation(s, offset, length, level, abi);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1188 return true;
1189 }
1190 }
1191 return false;
1192}
1193
1194bool
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1195DWARFExpression::Evaluate
1196(
1197 ExecutionContextScope *exe_scope,
1198 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1199 ClangExpressionVariableList *expr_locals,
1200 ClangExpressionDeclMap *decl_map,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1201 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1202 const Value* initial_value_ptr,
1203 Value& result,
1204 Error *error_ptr
1205) const
1206{
1207 ExecutionContext exe_ctx (exe_scope);
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1208 return Evaluate(&exe_ctx, ast_context, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1209}
1210
1211bool
1212DWARFExpression::Evaluate
1213(
1214 ExecutionContext *exe_ctx,
1215 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1216 ClangExpressionVariableList *expr_locals,
1217 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1218 RegisterContext *reg_ctx,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1219 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1220 const Value* initial_value_ptr,
1221 Value& result,
1222 Error *error_ptr
1223) const
1224{
1225 if (IsLocationList())
1226 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1227 lldb::offset_t offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1228 addr_t pc;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1229 StackFrame *frame = NULL;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1230 if (reg_ctx)
1231 pc = reg_ctx->GetPC();
1232 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1233 {
1234 frame = exe_ctx->GetFramePtr();
Sean Callanan86106812012-03-10 03:03:46 +0000[diff] [blame]1235 if (!frame)
1236 return false;
1237 RegisterContextSP reg_ctx_sp = frame->GetRegisterContext();
1238 if (!reg_ctx_sp)
1239 return false;
1240 pc = reg_ctx_sp->GetPC();
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1241 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1242
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1243 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1244 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1245 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1246 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1247 if (error_ptr)
1248 error_ptr->SetErrorString("Invalid PC in frame.");
1249 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1250 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1251
1252 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1253
1254 while (m_data.ValidOffset(offset))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1255 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1256 // We need to figure out what the value is for the location.
1257 addr_t lo_pc = m_data.GetAddress(&offset);
1258 addr_t hi_pc = m_data.GetAddress(&offset);
1259 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1260 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1261 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1262 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1263 else
1264 {
1265 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1266 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1267
1268 uint16_t length = m_data.GetU16(&offset);
1269
1270 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1271 {
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1272 return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, offset, length, m_reg_kind, initial_value_ptr, result, error_ptr);
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1273 }
1274 offset += length;
1275 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1276 }
1277 }
1278 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]1279 error_ptr->SetErrorString ("variable not available");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1280 return false;
1281 }
1282
1283 // Not a location list, just a single expression.
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1284 return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, 0, m_data.GetByteSize(), m_reg_kind, initial_value_ptr, result, error_ptr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1285}
1286
1287
1288
1289bool
1290DWARFExpression::Evaluate
1291(
1292 ExecutionContext *exe_ctx,
1293 clang::ASTContext *ast_context,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1294 ClangExpressionVariableList *expr_locals,
1295 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1296 RegisterContext *reg_ctx,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1297 const DataExtractor& opcodes,
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1298 const lldb::offset_t opcodes_offset,
1299 const lldb::offset_t opcodes_length,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1300 const uint32_t reg_kind,
1301 const Value* initial_value_ptr,
1302 Value& result,
1303 Error *error_ptr
1304)
1305{
1306 std::vector<Value> stack;
1307
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1308 Process *process = NULL;
1309 StackFrame *frame = NULL;
1310
1311 if (exe_ctx)
1312 {
1313 process = exe_ctx->GetProcessPtr();
1314 frame = exe_ctx->GetFramePtr();
1315 }
1316 if (reg_ctx == NULL && frame)
1317 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1318
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1319 if (initial_value_ptr)
1320 stack.push_back(*initial_value_ptr);
1321
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1322 lldb::offset_t offset = opcodes_offset;
1323 const lldb::offset_t end_offset = opcodes_offset + opcodes_length;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1324 Value tmp;
1325 uint32_t reg_num;
1326
1327 // Make sure all of the data is available in opcodes.
1328 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1329 {
1330 if (error_ptr)
1331 error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
1332 return false;
1333 }
Greg Claytone005f2c2010-11-06 01:53:30 +0000[diff] [blame]1334 LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1335
1336
1337 while (opcodes.ValidOffset(offset) && offset < end_offset)
1338 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1339 const lldb::offset_t op_offset = offset;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1340 const uint8_t op = opcodes.GetU8(&offset);
1341
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]1342 if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1343 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1344 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]1345 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1346 for (size_t i=0; i<count; ++i)
1347 {
1348 StreamString new_value;
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1349 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1350 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]1351 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1352 }
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1353 log->Printf("0x%8.8" PRIx64 ": %s", op_offset, DW_OP_value_to_name(op));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1354 }
1355 switch (op)
1356 {
1357 //----------------------------------------------------------------------
1358 // The DW_OP_addr operation has a single operand that encodes a machine
1359 // address and whose size is the size of an address on the target machine.
1360 //----------------------------------------------------------------------
1361 case DW_OP_addr:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1362 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1363 stack.back().SetValueType (Value::eValueTypeFileAddress);
1364 break;
1365
1366 //----------------------------------------------------------------------
1367 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1368 // shared libraries that have a location like:
1369 // DW_OP_addr(0x1000)
1370 // If this address resides in a shared library, then this virtual
1371 // address won't make sense when it is evaluated in the context of a
1372 // running process where shared libraries have been slid. To account for
1373 // this, this new address type where we can store the section pointer
1374 // and a 4 byte offset.
1375 //----------------------------------------------------------------------
1376// case DW_OP_addr_sect_offset4:
1377// {
1378// result_type = eResultTypeFileAddress;
1379// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1380// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1381//
1382// Address so_addr (sect, sect_offset);
1383// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1384// if (load_addr != LLDB_INVALID_ADDRESS)
1385// {
1386// // We successfully resolve a file address to a load
1387// // address.
1388// stack.push_back(load_addr);
1389// break;
1390// }
1391// else
1392// {
1393// // We were able
1394// if (error_ptr)
1395// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1396// return false;
1397// }
1398// }
1399// break;
1400
1401 //----------------------------------------------------------------------
1402 // OPCODE: DW_OP_deref
1403 // OPERANDS: none
1404 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1405 // The value retrieved from that address is pushed. The size of the
1406 // data retrieved from the dereferenced address is the size of an
1407 // address on the target machine.
1408 //----------------------------------------------------------------------
1409 case DW_OP_deref:
1410 {
1411 Value::ValueType value_type = stack.back().GetValueType();
1412 switch (value_type)
1413 {
1414 case Value::eValueTypeHostAddress:
1415 {
1416 void *src = (void *)stack.back().GetScalar().ULongLong();
1417 intptr_t ptr;
1418 ::memcpy (&ptr, src, sizeof(void *));
1419 stack.back().GetScalar() = ptr;
1420 stack.back().ClearContext();
1421 }
1422 break;
1423 case Value::eValueTypeLoadAddress:
1424 if (exe_ctx)
1425 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1426 if (process)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1427 {
1428 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1429 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1430 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1431 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1432 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1433 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1434 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1435 lldb::offset_t addr_data_offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1436 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1437 stack.back().ClearContext();
1438 }
1439 else
1440 {
1441 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1442 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1443 pointer_addr,
1444 error.AsCString());
1445 return false;
1446 }
1447 }
1448 else
1449 {
1450 if (error_ptr)
1451 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1452 return false;
1453 }
1454 }
1455 else
1456 {
1457 if (error_ptr)
1458 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1459 return false;
1460 }
1461 break;
1462
1463 default:
1464 break;
1465 }
1466
1467 }
1468 break;
1469
1470 //----------------------------------------------------------------------
1471 // OPCODE: DW_OP_deref_size
1472 // OPERANDS: 1
1473 // 1 - uint8_t that specifies the size of the data to dereference.
1474 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1475 // stack entry and treats it as an address. The value retrieved from that
1476 // address is pushed. In the DW_OP_deref_size operation, however, the
1477 // size in bytes of the data retrieved from the dereferenced address is
1478 // specified by the single operand. This operand is a 1-byte unsigned
1479 // integral constant whose value may not be larger than the size of an
1480 // address on the target machine. The data retrieved is zero extended
1481 // to the size of an address on the target machine before being pushed
1482 // on the expression stack.
1483 //----------------------------------------------------------------------
1484 case DW_OP_deref_size:
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1485 {
1486 uint8_t size = opcodes.GetU8(&offset);
1487 Value::ValueType value_type = stack.back().GetValueType();
1488 switch (value_type)
1489 {
1490 case Value::eValueTypeHostAddress:
1491 {
1492 void *src = (void *)stack.back().GetScalar().ULongLong();
1493 intptr_t ptr;
1494 ::memcpy (&ptr, src, sizeof(void *));
1495 // I can't decide whether the size operand should apply to the bytes in their
1496 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1497 // but I'll opt for assuming big endian regardless.
1498 switch (size)
1499 {
1500 case 1: ptr = ptr & 0xff; break;
1501 case 2: ptr = ptr & 0xffff; break;
1502 case 3: ptr = ptr & 0xffffff; break;
1503 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendaa99bcaa2010-11-29 21:38:58 +0000[diff] [blame]1504 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1505 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1506 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1507 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1508 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1509 default: break;
1510 }
1511 stack.back().GetScalar() = ptr;
1512 stack.back().ClearContext();
1513 }
1514 break;
1515 case Value::eValueTypeLoadAddress:
1516 if (exe_ctx)
1517 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1518 if (process)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1519 {
1520 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1521 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1522 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1523 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1524 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1525 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]1526 lldb::offset_t addr_data_offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1527 switch (size)
1528 {
1529 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1530 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1531 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1532 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1533 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1534 }
1535 stack.back().ClearContext();
1536 }
1537 else
1538 {
1539 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1540 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1541 pointer_addr,
1542 error.AsCString());
1543 return false;
1544 }
1545 }
1546 else
1547 {
1548 if (error_ptr)
1549 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1550 return false;
1551 }
1552 }
1553 else
1554 {
1555 if (error_ptr)
1556 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1557 return false;
1558 }
1559 break;
1560
1561 default:
1562 break;
1563 }
1564
1565 }
1566 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1567
1568 //----------------------------------------------------------------------
1569 // OPCODE: DW_OP_xderef_size
1570 // OPERANDS: 1
1571 // 1 - uint8_t that specifies the size of the data to dereference.
1572 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1573 // the top of the stack is treated as an address. The second stack
Greg Clayton33ed1702010-08-24 00:45:41 +0000[diff] [blame]1574 // entry is treated as an "address space identifier" for those
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1575 // architectures that support multiple address spaces. The top two
1576 // stack elements are popped, a data item is retrieved through an
1577 // implementation-defined address calculation and pushed as the new
1578 // stack top. In the DW_OP_xderef_size operation, however, the size in
1579 // bytes of the data retrieved from the dereferenced address is
1580 // specified by the single operand. This operand is a 1-byte unsigned
1581 // integral constant whose value may not be larger than the size of an
1582 // address on the target machine. The data retrieved is zero extended
1583 // to the size of an address on the target machine before being pushed
1584 // on the expression stack.
1585 //----------------------------------------------------------------------
1586 case DW_OP_xderef_size:
1587 if (error_ptr)
1588 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1589 return false;
1590 //----------------------------------------------------------------------
1591 // OPCODE: DW_OP_xderef
1592 // OPERANDS: none
1593 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1594 // the top of the stack is treated as an address. The second stack entry
1595 // is treated as an "address space identifier" for those architectures
1596 // that support multiple address spaces. The top two stack elements are
1597 // popped, a data item is retrieved through an implementation-defined
1598 // address calculation and pushed as the new stack top. The size of the
1599 // data retrieved from the dereferenced address is the size of an address
1600 // on the target machine.
1601 //----------------------------------------------------------------------
1602 case DW_OP_xderef:
1603 if (error_ptr)
1604 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1605 return false;
1606
1607 //----------------------------------------------------------------------
1608 // All DW_OP_constXXX opcodes have a single operand as noted below:
1609 //
1610 // Opcode Operand 1
1611 // --------------- ----------------------------------------------------
1612 // DW_OP_const1u 1-byte unsigned integer constant
1613 // DW_OP_const1s 1-byte signed integer constant
1614 // DW_OP_const2u 2-byte unsigned integer constant
1615 // DW_OP_const2s 2-byte signed integer constant
1616 // DW_OP_const4u 4-byte unsigned integer constant
1617 // DW_OP_const4s 4-byte signed integer constant
1618 // DW_OP_const8u 8-byte unsigned integer constant
1619 // DW_OP_const8s 8-byte signed integer constant
1620 // DW_OP_constu unsigned LEB128 integer constant
1621 // DW_OP_consts signed LEB128 integer constant
1622 //----------------------------------------------------------------------
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1623 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1624 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1625 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1626 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1627 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1628 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1629 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1630 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1631 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1632 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1633
1634 //----------------------------------------------------------------------
1635 // OPCODE: DW_OP_dup
1636 // OPERANDS: none
1637 // DESCRIPTION: duplicates the value at the top of the stack
1638 //----------------------------------------------------------------------
1639 case DW_OP_dup:
1640 if (stack.empty())
1641 {
1642 if (error_ptr)
1643 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1644 return false;
1645 }
1646 else
1647 stack.push_back(stack.back());
1648 break;
1649
1650 //----------------------------------------------------------------------
1651 // OPCODE: DW_OP_drop
1652 // OPERANDS: none
1653 // DESCRIPTION: pops the value at the top of the stack
1654 //----------------------------------------------------------------------
1655 case DW_OP_drop:
1656 if (stack.empty())
1657 {
1658 if (error_ptr)
1659 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1660 return false;
1661 }
1662 else
1663 stack.pop_back();
1664 break;
1665
1666 //----------------------------------------------------------------------
1667 // OPCODE: DW_OP_over
1668 // OPERANDS: none
1669 // DESCRIPTION: Duplicates the entry currently second in the stack at
1670 // the top of the stack.
1671 //----------------------------------------------------------------------
1672 case DW_OP_over:
1673 if (stack.size() < 2)
1674 {
1675 if (error_ptr)
1676 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1677 return false;
1678 }
1679 else
1680 stack.push_back(stack[stack.size() - 2]);
1681 break;
1682
1683
1684 //----------------------------------------------------------------------
1685 // OPCODE: DW_OP_pick
1686 // OPERANDS: uint8_t index into the current stack
1687 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1688 // inclusive) is pushed on the stack
1689 //----------------------------------------------------------------------
1690 case DW_OP_pick:
1691 {
1692 uint8_t pick_idx = opcodes.GetU8(&offset);
1693 if (pick_idx < stack.size())
1694 stack.push_back(stack[pick_idx]);
1695 else
1696 {
1697 if (error_ptr)
1698 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1699 return false;
1700 }
1701 }
1702 break;
1703
1704 //----------------------------------------------------------------------
1705 // OPCODE: DW_OP_swap
1706 // OPERANDS: none
1707 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1708 // of the stack becomes the second stack entry, and the second entry
1709 // becomes the top of the stack
1710 //----------------------------------------------------------------------
1711 case DW_OP_swap:
1712 if (stack.size() < 2)
1713 {
1714 if (error_ptr)
1715 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1716 return false;
1717 }
1718 else
1719 {
1720 tmp = stack.back();
1721 stack.back() = stack[stack.size() - 2];
1722 stack[stack.size() - 2] = tmp;
1723 }
1724 break;
1725
1726 //----------------------------------------------------------------------
1727 // OPCODE: DW_OP_rot
1728 // OPERANDS: none
1729 // DESCRIPTION: Rotates the first three stack entries. The entry at
1730 // the top of the stack becomes the third stack entry, the second
1731 // entry becomes the top of the stack, and the third entry becomes
1732 // the second entry.
1733 //----------------------------------------------------------------------
1734 case DW_OP_rot:
1735 if (stack.size() < 3)
1736 {
1737 if (error_ptr)
1738 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1739 return false;
1740 }
1741 else
1742 {
1743 size_t last_idx = stack.size() - 1;
1744 Value old_top = stack[last_idx];
1745 stack[last_idx] = stack[last_idx - 1];
1746 stack[last_idx - 1] = stack[last_idx - 2];
1747 stack[last_idx - 2] = old_top;
1748 }
1749 break;
1750
1751 //----------------------------------------------------------------------
1752 // OPCODE: DW_OP_abs
1753 // OPERANDS: none
1754 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1755 // value and pushes its absolute value. If the absolute value can not be
1756 // represented, the result is undefined.
1757 //----------------------------------------------------------------------
1758 case DW_OP_abs:
1759 if (stack.empty())
1760 {
1761 if (error_ptr)
1762 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1763 return false;
1764 }
1765 else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
1766 {
1767 if (error_ptr)
1768 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1769 return false;
1770 }
1771 break;
1772
1773 //----------------------------------------------------------------------
1774 // OPCODE: DW_OP_and
1775 // OPERANDS: none
1776 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1777 // operation on the two, and pushes the result.
1778 //----------------------------------------------------------------------
1779 case DW_OP_and:
1780 if (stack.size() < 2)
1781 {
1782 if (error_ptr)
1783 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1784 return false;
1785 }
1786 else
1787 {
1788 tmp = stack.back();
1789 stack.pop_back();
1790 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
1791 }
1792 break;
1793
1794 //----------------------------------------------------------------------
1795 // OPCODE: DW_OP_div
1796 // OPERANDS: none
1797 // DESCRIPTION: pops the top two stack values, divides the former second
1798 // entry by the former top of the stack using signed division, and
1799 // pushes the result.
1800 //----------------------------------------------------------------------
1801 case DW_OP_div:
1802 if (stack.size() < 2)
1803 {
1804 if (error_ptr)
1805 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1806 return false;
1807 }
1808 else
1809 {
1810 tmp = stack.back();
1811 if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
1812 {
1813 if (error_ptr)
1814 error_ptr->SetErrorString("Divide by zero.");
1815 return false;
1816 }
1817 else
1818 {
1819 stack.pop_back();
1820 stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
1821 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1822 {
1823 if (error_ptr)
1824 error_ptr->SetErrorString("Divide failed.");
1825 return false;
1826 }
1827 }
1828 }
1829 break;
1830
1831 //----------------------------------------------------------------------
1832 // OPCODE: DW_OP_minus
1833 // OPERANDS: none
1834 // DESCRIPTION: pops the top two stack values, subtracts the former top
1835 // of the stack from the former second entry, and pushes the result.
1836 //----------------------------------------------------------------------
1837 case DW_OP_minus:
1838 if (stack.size() < 2)
1839 {
1840 if (error_ptr)
1841 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1842 return false;
1843 }
1844 else
1845 {
1846 tmp = stack.back();
1847 stack.pop_back();
1848 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
1849 }
1850 break;
1851
1852 //----------------------------------------------------------------------
1853 // OPCODE: DW_OP_mod
1854 // OPERANDS: none
1855 // DESCRIPTION: pops the top two stack values and pushes the result of
1856 // the calculation: former second stack entry modulo the former top of
1857 // the stack.
1858 //----------------------------------------------------------------------
1859 case DW_OP_mod:
1860 if (stack.size() < 2)
1861 {
1862 if (error_ptr)
1863 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1864 return false;
1865 }
1866 else
1867 {
1868 tmp = stack.back();
1869 stack.pop_back();
1870 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
1871 }
1872 break;
1873
1874
1875 //----------------------------------------------------------------------
1876 // OPCODE: DW_OP_mul
1877 // OPERANDS: none
1878 // DESCRIPTION: pops the top two stack entries, multiplies them
1879 // together, and pushes the result.
1880 //----------------------------------------------------------------------
1881 case DW_OP_mul:
1882 if (stack.size() < 2)
1883 {
1884 if (error_ptr)
1885 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1886 return false;
1887 }
1888 else
1889 {
1890 tmp = stack.back();
1891 stack.pop_back();
1892 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
1893 }
1894 break;
1895
1896 //----------------------------------------------------------------------
1897 // OPCODE: DW_OP_neg
1898 // OPERANDS: none
1899 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1900 //----------------------------------------------------------------------
1901 case DW_OP_neg:
1902 if (stack.empty())
1903 {
1904 if (error_ptr)
1905 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1906 return false;
1907 }
1908 else
1909 {
1910 if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
1911 {
1912 if (error_ptr)
1913 error_ptr->SetErrorString("Unary negate failed.");
1914 return false;
1915 }
1916 }
1917 break;
1918
1919 //----------------------------------------------------------------------
1920 // OPCODE: DW_OP_not
1921 // OPERANDS: none
1922 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1923 // complement
1924 //----------------------------------------------------------------------
1925 case DW_OP_not:
1926 if (stack.empty())
1927 {
1928 if (error_ptr)
1929 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1930 return false;
1931 }
1932 else
1933 {
1934 if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
1935 {
1936 if (error_ptr)
1937 error_ptr->SetErrorString("Logical NOT failed.");
1938 return false;
1939 }
1940 }
1941 break;
1942
1943 //----------------------------------------------------------------------
1944 // OPCODE: DW_OP_or
1945 // OPERANDS: none
1946 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1947 // operation on the two, and pushes the result.
1948 //----------------------------------------------------------------------
1949 case DW_OP_or:
1950 if (stack.size() < 2)
1951 {
1952 if (error_ptr)
1953 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1954 return false;
1955 }
1956 else
1957 {
1958 tmp = stack.back();
1959 stack.pop_back();
1960 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
1961 }
1962 break;
1963
1964 //----------------------------------------------------------------------
1965 // OPCODE: DW_OP_plus
1966 // OPERANDS: none
1967 // DESCRIPTION: pops the top two stack entries, adds them together, and
1968 // pushes the result.
1969 //----------------------------------------------------------------------
1970 case DW_OP_plus:
1971 if (stack.size() < 2)
1972 {
1973 if (error_ptr)
1974 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1975 return false;
1976 }
1977 else
1978 {
1979 tmp = stack.back();
1980 stack.pop_back();
1981 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
1982 }
1983 break;
1984
1985 //----------------------------------------------------------------------
1986 // OPCODE: DW_OP_plus_uconst
1987 // OPERANDS: none
1988 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1989 // constant operand and pushes the result.
1990 //----------------------------------------------------------------------
1991 case DW_OP_plus_uconst:
1992 if (stack.empty())
1993 {
1994 if (error_ptr)
1995 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
1996 return false;
1997 }
1998 else
1999 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]2000 const uint64_t uconst_value = opcodes.GetULEB128(&offset);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2001 // Implicit conversion from a UINT to a Scalar...
2002 stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
2003 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
2004 {
2005 if (error_ptr)
2006 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
2007 return false;
2008 }
2009 }
2010 break;
2011
2012 //----------------------------------------------------------------------
2013 // OPCODE: DW_OP_shl
2014 // OPERANDS: none
2015 // DESCRIPTION: pops the top two stack entries, shifts the former
2016 // second entry left by the number of bits specified by the former top
2017 // of the stack, and pushes the result.
2018 //----------------------------------------------------------------------
2019 case DW_OP_shl:
2020 if (stack.size() < 2)
2021 {
2022 if (error_ptr)
2023 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
2024 return false;
2025 }
2026 else
2027 {
2028 tmp = stack.back();
2029 stack.pop_back();
2030 stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
2031 }
2032 break;
2033
2034 //----------------------------------------------------------------------
2035 // OPCODE: DW_OP_shr
2036 // OPERANDS: none
2037 // DESCRIPTION: pops the top two stack entries, shifts the former second
2038 // entry right logically (filling with zero bits) by the number of bits
2039 // specified by the former top of the stack, and pushes the result.
2040 //----------------------------------------------------------------------
2041 case DW_OP_shr:
2042 if (stack.size() < 2)
2043 {
2044 if (error_ptr)
2045 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2046 return false;
2047 }
2048 else
2049 {
2050 tmp = stack.back();
2051 stack.pop_back();
2052 if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
2053 {
2054 if (error_ptr)
2055 error_ptr->SetErrorString("DW_OP_shr failed.");
2056 return false;
2057 }
2058 }
2059 break;
2060
2061 //----------------------------------------------------------------------
2062 // OPCODE: DW_OP_shra
2063 // OPERANDS: none
2064 // DESCRIPTION: pops the top two stack entries, shifts the former second
2065 // entry right arithmetically (divide the magnitude by 2, keep the same
2066 // sign for the result) by the number of bits specified by the former
2067 // top of the stack, and pushes the result.
2068 //----------------------------------------------------------------------
2069 case DW_OP_shra:
2070 if (stack.size() < 2)
2071 {
2072 if (error_ptr)
2073 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2074 return false;
2075 }
2076 else
2077 {
2078 tmp = stack.back();
2079 stack.pop_back();
2080 stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
2081 }
2082 break;
2083
2084 //----------------------------------------------------------------------
2085 // OPCODE: DW_OP_xor
2086 // OPERANDS: none
2087 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2088 // exclusive-or operation on the two, and pushes the result.
2089 //----------------------------------------------------------------------
2090 case DW_OP_xor:
2091 if (stack.size() < 2)
2092 {
2093 if (error_ptr)
2094 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2095 return false;
2096 }
2097 else
2098 {
2099 tmp = stack.back();
2100 stack.pop_back();
2101 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
2102 }
2103 break;
2104
2105
2106 //----------------------------------------------------------------------
2107 // OPCODE: DW_OP_skip
2108 // OPERANDS: int16_t
2109 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2110 // signed integer constant. The 2-byte constant is the number of bytes
2111 // of the DWARF expression to skip forward or backward from the current
2112 // operation, beginning after the 2-byte constant.
2113 //----------------------------------------------------------------------
2114 case DW_OP_skip:
2115 {
2116 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]2117 lldb::offset_t new_offset = offset + skip_offset;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2118 if (new_offset >= opcodes_offset && new_offset < end_offset)
2119 offset = new_offset;
2120 else
2121 {
2122 if (error_ptr)
2123 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2124 return false;
2125 }
2126 }
2127 break;
2128
2129 //----------------------------------------------------------------------
2130 // OPCODE: DW_OP_bra
2131 // OPERANDS: int16_t
2132 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2133 // signed integer constant. This operation pops the top of stack. If
2134 // the value popped is not the constant 0, the 2-byte constant operand
2135 // is the number of bytes of the DWARF expression to skip forward or
2136 // backward from the current operation, beginning after the 2-byte
2137 // constant.
2138 //----------------------------------------------------------------------
2139 case DW_OP_bra:
2140 {
2141 tmp = stack.back();
2142 stack.pop_back();
2143 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2144 Scalar zero(0);
2145 if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
2146 {
Greg Clayton36da2aa2013-01-25 18:06:21 +0000[diff] [blame]2147 lldb::offset_t new_offset = offset + bra_offset;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2148 if (new_offset >= opcodes_offset && new_offset < end_offset)
2149 offset = new_offset;
2150 else
2151 {
2152 if (error_ptr)
2153 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
2154 return false;
2155 }
2156 }
2157 }
2158 break;
2159
2160 //----------------------------------------------------------------------
2161 // OPCODE: DW_OP_eq
2162 // OPERANDS: none
2163 // DESCRIPTION: pops the top two stack values, compares using the
2164 // equals (==) operator.
2165 // STACK RESULT: push the constant value 1 onto the stack if the result
2166 // of the operation is true or the constant value 0 if the result of the
2167 // operation is false.
2168 //----------------------------------------------------------------------
2169 case DW_OP_eq:
2170 if (stack.size() < 2)
2171 {
2172 if (error_ptr)
2173 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2174 return false;
2175 }
2176 else
2177 {
2178 tmp = stack.back();
2179 stack.pop_back();
2180 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
2181 }
2182 break;
2183
2184 //----------------------------------------------------------------------
2185 // OPCODE: DW_OP_ge
2186 // OPERANDS: none
2187 // DESCRIPTION: pops the top two stack values, compares using the
2188 // greater than or equal to (>=) operator.
2189 // STACK RESULT: push the constant value 1 onto the stack if the result
2190 // of the operation is true or the constant value 0 if the result of the
2191 // operation is false.
2192 //----------------------------------------------------------------------
2193 case DW_OP_ge:
2194 if (stack.size() < 2)
2195 {
2196 if (error_ptr)
2197 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2198 return false;
2199 }
2200 else
2201 {
2202 tmp = stack.back();
2203 stack.pop_back();
2204 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
2205 }
2206 break;
2207
2208 //----------------------------------------------------------------------
2209 // OPCODE: DW_OP_gt
2210 // OPERANDS: none
2211 // DESCRIPTION: pops the top two stack values, compares using the
2212 // greater than (>) operator.
2213 // STACK RESULT: push the constant value 1 onto the stack if the result
2214 // of the operation is true or the constant value 0 if the result of the
2215 // operation is false.
2216 //----------------------------------------------------------------------
2217 case DW_OP_gt:
2218 if (stack.size() < 2)
2219 {
2220 if (error_ptr)
2221 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2222 return false;
2223 }
2224 else
2225 {
2226 tmp = stack.back();
2227 stack.pop_back();
2228 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
2229 }
2230 break;
2231
2232 //----------------------------------------------------------------------
2233 // OPCODE: DW_OP_le
2234 // OPERANDS: none
2235 // DESCRIPTION: pops the top two stack values, compares using the
2236 // less than or equal to (<=) operator.
2237 // STACK RESULT: push the constant value 1 onto the stack if the result
2238 // of the operation is true or the constant value 0 if the result of the
2239 // operation is false.
2240 //----------------------------------------------------------------------
2241 case DW_OP_le:
2242 if (stack.size() < 2)
2243 {
2244 if (error_ptr)
2245 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2246 return false;
2247 }
2248 else
2249 {
2250 tmp = stack.back();
2251 stack.pop_back();
2252 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
2253 }
2254 break;
2255
2256 //----------------------------------------------------------------------
2257 // OPCODE: DW_OP_lt
2258 // OPERANDS: none
2259 // DESCRIPTION: pops the top two stack values, compares using the
2260 // less than (<) operator.
2261 // STACK RESULT: push the constant value 1 onto the stack if the result
2262 // of the operation is true or the constant value 0 if the result of the
2263 // operation is false.
2264 //----------------------------------------------------------------------
2265 case DW_OP_lt:
2266 if (stack.size() < 2)
2267 {
2268 if (error_ptr)
2269 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2270 return false;
2271 }
2272 else
2273 {
2274 tmp = stack.back();
2275 stack.pop_back();
2276 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
2277 }
2278 break;
2279
2280 //----------------------------------------------------------------------
2281 // OPCODE: DW_OP_ne
2282 // OPERANDS: none
2283 // DESCRIPTION: pops the top two stack values, compares using the
2284 // not equal (!=) operator.
2285 // STACK RESULT: push the constant value 1 onto the stack if the result
2286 // of the operation is true or the constant value 0 if the result of the
2287 // operation is false.
2288 //----------------------------------------------------------------------
2289 case DW_OP_ne:
2290 if (stack.size() < 2)
2291 {
2292 if (error_ptr)
2293 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2294 return false;
2295 }
2296 else
2297 {
2298 tmp = stack.back();
2299 stack.pop_back();
2300 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
2301 }
2302 break;
2303
2304 //----------------------------------------------------------------------
2305 // OPCODE: DW_OP_litn
2306 // OPERANDS: none
2307 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2308 // STACK RESULT: push the unsigned literal constant value onto the top
2309 // of the stack.
2310 //----------------------------------------------------------------------
2311 case DW_OP_lit0:
2312 case DW_OP_lit1:
2313 case DW_OP_lit2:
2314 case DW_OP_lit3:
2315 case DW_OP_lit4:
2316 case DW_OP_lit5:
2317 case DW_OP_lit6:
2318 case DW_OP_lit7:
2319 case DW_OP_lit8:
2320 case DW_OP_lit9:
2321 case DW_OP_lit10:
2322 case DW_OP_lit11:
2323 case DW_OP_lit12:
2324 case DW_OP_lit13:
2325 case DW_OP_lit14:
2326 case DW_OP_lit15:
2327 case DW_OP_lit16:
2328 case DW_OP_lit17:
2329 case DW_OP_lit18:
2330 case DW_OP_lit19:
2331 case DW_OP_lit20:
2332 case DW_OP_lit21:
2333 case DW_OP_lit22:
2334 case DW_OP_lit23:
2335 case DW_OP_lit24:
2336 case DW_OP_lit25:
2337 case DW_OP_lit26:
2338 case DW_OP_lit27:
2339 case DW_OP_lit28:
2340 case DW_OP_lit29:
2341 case DW_OP_lit30:
2342 case DW_OP_lit31:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2343 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2344 break;
2345
2346 //----------------------------------------------------------------------
2347 // OPCODE: DW_OP_regN
2348 // OPERANDS: none
2349 // DESCRIPTION: Push the value in register n on the top of the stack.
2350 //----------------------------------------------------------------------
2351 case DW_OP_reg0:
2352 case DW_OP_reg1:
2353 case DW_OP_reg2:
2354 case DW_OP_reg3:
2355 case DW_OP_reg4:
2356 case DW_OP_reg5:
2357 case DW_OP_reg6:
2358 case DW_OP_reg7:
2359 case DW_OP_reg8:
2360 case DW_OP_reg9:
2361 case DW_OP_reg10:
2362 case DW_OP_reg11:
2363 case DW_OP_reg12:
2364 case DW_OP_reg13:
2365 case DW_OP_reg14:
2366 case DW_OP_reg15:
2367 case DW_OP_reg16:
2368 case DW_OP_reg17:
2369 case DW_OP_reg18:
2370 case DW_OP_reg19:
2371 case DW_OP_reg20:
2372 case DW_OP_reg21:
2373 case DW_OP_reg22:
2374 case DW_OP_reg23:
2375 case DW_OP_reg24:
2376 case DW_OP_reg25:
2377 case DW_OP_reg26:
2378 case DW_OP_reg27:
2379 case DW_OP_reg28:
2380 case DW_OP_reg29:
2381 case DW_OP_reg30:
2382 case DW_OP_reg31:
2383 {
2384 reg_num = op - DW_OP_reg0;
2385
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2386 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2387 stack.push_back(tmp);
2388 else
2389 return false;
2390 }
2391 break;
2392 //----------------------------------------------------------------------
2393 // OPCODE: DW_OP_regx
2394 // OPERANDS:
2395 // ULEB128 literal operand that encodes the register.
2396 // DESCRIPTION: Push the value in register on the top of the stack.
2397 //----------------------------------------------------------------------
2398 case DW_OP_regx:
2399 {
2400 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2401 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2402 stack.push_back(tmp);
2403 else
2404 return false;
2405 }
2406 break;
2407
2408 //----------------------------------------------------------------------
2409 // OPCODE: DW_OP_bregN
2410 // OPERANDS:
2411 // SLEB128 offset from register N
2412 // DESCRIPTION: Value is in memory at the address specified by register
2413 // N plus an offset.
2414 //----------------------------------------------------------------------
2415 case DW_OP_breg0:
2416 case DW_OP_breg1:
2417 case DW_OP_breg2:
2418 case DW_OP_breg3:
2419 case DW_OP_breg4:
2420 case DW_OP_breg5:
2421 case DW_OP_breg6:
2422 case DW_OP_breg7:
2423 case DW_OP_breg8:
2424 case DW_OP_breg9:
2425 case DW_OP_breg10:
2426 case DW_OP_breg11:
2427 case DW_OP_breg12:
2428 case DW_OP_breg13:
2429 case DW_OP_breg14:
2430 case DW_OP_breg15:
2431 case DW_OP_breg16:
2432 case DW_OP_breg17:
2433 case DW_OP_breg18:
2434 case DW_OP_breg19:
2435 case DW_OP_breg20:
2436 case DW_OP_breg21:
2437 case DW_OP_breg22:
2438 case DW_OP_breg23:
2439 case DW_OP_breg24:
2440 case DW_OP_breg25:
2441 case DW_OP_breg26:
2442 case DW_OP_breg27:
2443 case DW_OP_breg28:
2444 case DW_OP_breg29:
2445 case DW_OP_breg30:
2446 case DW_OP_breg31:
2447 {
2448 reg_num = op - DW_OP_breg0;
2449
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2450 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2451 {
2452 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2453 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
Sean Callanan6fc5c712012-01-06 18:24:47 +0000[diff] [blame]2454 tmp.ClearContext();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2455 stack.push_back(tmp);
2456 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2457 }
2458 else
2459 return false;
2460 }
2461 break;
2462 //----------------------------------------------------------------------
2463 // OPCODE: DW_OP_bregx
2464 // OPERANDS: 2
2465 // ULEB128 literal operand that encodes the register.
2466 // SLEB128 offset from register N
2467 // DESCRIPTION: Value is in memory at the address specified by register
2468 // N plus an offset.
2469 //----------------------------------------------------------------------
2470 case DW_OP_bregx:
2471 {
2472 reg_num = opcodes.GetULEB128(&offset);
2473
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2474 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2475 {
2476 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2477 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
Sean Callanan6fc5c712012-01-06 18:24:47 +0000[diff] [blame]2478 tmp.ClearContext();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2479 stack.push_back(tmp);
2480 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2481 }
2482 else
2483 return false;
2484 }
2485 break;
2486
2487 case DW_OP_fbreg:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2488 if (exe_ctx)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2489 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2490 if (frame)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2491 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2492 Scalar value;
2493 if (frame->GetFrameBaseValue(value, error_ptr))
2494 {
2495 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2496 value += fbreg_offset;
2497 stack.push_back(value);
2498 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2499 }
2500 else
2501 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2502 }
2503 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2504 {
2505 if (error_ptr)
2506 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2507 return false;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2508 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2509 }
2510 else
2511 {
2512 if (error_ptr)
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2513 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2514 return false;
2515 }
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2516
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2517 break;
2518
2519 //----------------------------------------------------------------------
2520 // OPCODE: DW_OP_nop
2521 // OPERANDS: none
2522 // DESCRIPTION: A place holder. It has no effect on the location stack
2523 // or any of its values.
2524 //----------------------------------------------------------------------
2525 case DW_OP_nop:
2526 break;
2527
2528 //----------------------------------------------------------------------
2529 // OPCODE: DW_OP_piece
2530 // OPERANDS: 1
2531 // ULEB128: byte size of the piece
2532 // DESCRIPTION: The operand describes the size in bytes of the piece of
2533 // the object referenced by the DWARF expression whose result is at the
2534 // top of the stack. If the piece is located in a register, but does not
2535 // occupy the entire register, the placement of the piece within that
2536 // register is defined by the ABI.
2537 //
2538 // Many compilers store a single variable in sets of registers, or store
2539 // a variable partially in memory and partially in registers.
2540 // DW_OP_piece provides a way of describing how large a part of a
2541 // variable a particular DWARF expression refers to.
2542 //----------------------------------------------------------------------
2543 case DW_OP_piece:
2544 if (error_ptr)
2545 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2546 return false;
2547
2548 //----------------------------------------------------------------------
2549 // OPCODE: DW_OP_push_object_address
2550 // OPERANDS: none
2551 // DESCRIPTION: Pushes the address of the object currently being
2552 // evaluated as part of evaluation of a user presented expression.
2553 // This object may correspond to an independent variable described by
2554 // its own DIE or it may be a component of an array, structure, or class
2555 // whose address has been dynamically determined by an earlier step
2556 // during user expression evaluation.
2557 //----------------------------------------------------------------------
2558 case DW_OP_push_object_address:
2559 if (error_ptr)
2560 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2561 return false;
2562
2563 //----------------------------------------------------------------------
2564 // OPCODE: DW_OP_call2
2565 // OPERANDS:
2566 // uint16_t compile unit relative offset of a DIE
2567 // DESCRIPTION: Performs subroutine calls during evaluation
2568 // of a DWARF expression. The operand is the 2-byte unsigned offset
2569 // of a debugging information entry in the current compilation unit.
2570 //
2571 // Operand interpretation is exactly like that for DW_FORM_ref2.
2572 //
2573 // This operation transfers control of DWARF expression evaluation
2574 // to the DW_AT_location attribute of the referenced DIE. If there is
2575 // no such attribute, then there is no effect. Execution of the DWARF
2576 // expression of a DW_AT_location attribute may add to and/or remove from
2577 // values on the stack. Execution returns to the point following the call
2578 // when the end of the attribute is reached. Values on the stack at the
2579 // time of the call may be used as parameters by the called expression
2580 // and values left on the stack by the called expression may be used as
2581 // return values by prior agreement between the calling and called
2582 // expressions.
2583 //----------------------------------------------------------------------
2584 case DW_OP_call2:
2585 if (error_ptr)
2586 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2587 return false;
2588 //----------------------------------------------------------------------
2589 // OPCODE: DW_OP_call4
2590 // OPERANDS: 1
2591 // uint32_t compile unit relative offset of a DIE
2592 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2593 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2594 // of a debugging information entry in the current compilation unit.
2595 //
2596 // Operand interpretation DW_OP_call4 is exactly like that for
2597 // DW_FORM_ref4.
2598 //
2599 // This operation transfers control of DWARF expression evaluation
2600 // to the DW_AT_location attribute of the referenced DIE. If there is
2601 // no such attribute, then there is no effect. Execution of the DWARF
2602 // expression of a DW_AT_location attribute may add to and/or remove from
2603 // values on the stack. Execution returns to the point following the call
2604 // when the end of the attribute is reached. Values on the stack at the
2605 // time of the call may be used as parameters by the called expression
2606 // and values left on the stack by the called expression may be used as
2607 // return values by prior agreement between the calling and called
2608 // expressions.
2609 //----------------------------------------------------------------------
2610 case DW_OP_call4:
2611 if (error_ptr)
2612 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2613 return false;
2614
Andrew Kaylor90f5f502013-03-06 21:13:09 +0000[diff] [blame]2615 //----------------------------------------------------------------------
2616 // OPCODE: DW_OP_stack_value
2617 // OPERANDS: None
2618 // DESCRIPTION: Specifies that the object does not exist in memory but
2619 // rather is a constant value. The value from the top of the stack is
2620 // the value to be used. This is the actual object value and not the
2621 // location.
2622 //----------------------------------------------------------------------
2623 case DW_OP_stack_value:
2624 stack.back().SetValueType(Value::eValueTypeScalar);
2625 break;
2626
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2627#if 0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2628 //----------------------------------------------------------------------
2629 // OPCODE: DW_OP_call_ref
2630 // OPERANDS:
2631 // uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
2632 // absolute DIE offset for 64 bit DWARF.
2633 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2634 // expression. Takes a single operand. In the 32-bit DWARF format, the
2635 // operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
2636 // is an 8-byte unsigned value. The operand is used as the offset of a
2637 // debugging information entry in a .debug_info section which may be
2638 // contained in a shared object for executable other than that
2639 // containing the operator. For references from one shared object or
2640 // executable to another, the relocation must be performed by the
2641 // consumer.
2642 //
2643 // Operand interpretation of DW_OP_call_ref is exactly like that for
2644 // DW_FORM_ref_addr.
2645 //
2646 // This operation transfers control of DWARF expression evaluation
2647 // to the DW_AT_location attribute of the referenced DIE. If there is
2648 // no such attribute, then there is no effect. Execution of the DWARF
2649 // expression of a DW_AT_location attribute may add to and/or remove from
2650 // values on the stack. Execution returns to the point following the call
2651 // when the end of the attribute is reached. Values on the stack at the
2652 // time of the call may be used as parameters by the called expression
2653 // and values left on the stack by the called expression may be used as
2654 // return values by prior agreement between the calling and called
2655 // expressions.
2656 //----------------------------------------------------------------------
2657 case DW_OP_call_ref:
2658 if (error_ptr)
2659 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
2660 return false;
2661
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2662 //----------------------------------------------------------------------
2663 // OPCODE: DW_OP_APPLE_array_ref
2664 // OPERANDS: none
2665 // DESCRIPTION: Pops a value off the stack and uses it as the array
2666 // index. Pops a second value off the stack and uses it as the array
2667 // itself. Pushes a value onto the stack representing the element of
2668 // the array specified by the index.
2669 //----------------------------------------------------------------------
2670 case DW_OP_APPLE_array_ref:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2671 {
2672 if (stack.size() < 2)
2673 {
2674 if (error_ptr)
2675 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
2676 return false;
2677 }
2678
2679 Value index_val = stack.back();
2680 stack.pop_back();
2681 Value array_val = stack.back();
2682 stack.pop_back();
2683
2684 Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2685 int64_t index = index_scalar.SLongLong(LLONG_MAX);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2686
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2687 if (index == LLONG_MAX)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2688 {
2689 if (error_ptr)
2690 error_ptr->SetErrorString("Invalid array index.");
2691 return false;
2692 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2693
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2694 if (array_val.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2695 {
2696 if (error_ptr)
2697 error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
2698 return false;
2699 }
2700
2701 if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
2702 array_val.GetValueType() != Value::eValueTypeHostAddress)
2703 {
2704 if (error_ptr)
2705 error_ptr->SetErrorString("Array must be stored in memory.");
2706 return false;
2707 }
2708
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2709 void *array_type = array_val.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2710
2711 void *member_type;
2712 uint64_t size = 0;
2713
2714 if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
2715 (!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
2716 {
2717 if (error_ptr)
2718 error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
2719 return false;
2720 }
2721
2722 if (size && (index >= size || index < 0))
2723 {
2724 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]2725 error_ptr->SetErrorStringWithFormat("Out of bounds array access. %" PRId64 " is not in [0, %" PRIu64 "]", index, size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2726 return false;
2727 }
2728
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2729 uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
2730 uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2731 uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
2732 if (member_bit_incr % 8)
2733 {
2734 if (error_ptr)
Jason Molenda95b7b432011-09-20 00:26:08 +0000[diff] [blame]2735 error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2736 return false;
2737 }
2738 int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
2739
2740 Value member;
2741
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2742 member.SetContext(Value::eContextTypeClangType, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2743 member.SetValueType(array_val.GetValueType());
2744
2745 addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
2746 addr_t member_loc = array_base + member_offset;
2747 member.GetScalar() = (uint64_t)member_loc;
2748
2749 stack.push_back(member);
2750 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2751 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2752
2753 //----------------------------------------------------------------------
2754 // OPCODE: DW_OP_APPLE_uninit
2755 // OPERANDS: none
2756 // DESCRIPTION: Lets us know that the value is currently not initialized
2757 //----------------------------------------------------------------------
2758 case DW_OP_APPLE_uninit:
2759 //return eResultTypeErrorUninitialized;
2760 break; // Ignore this as we have seen cases where this value is incorrectly added
2761
2762 //----------------------------------------------------------------------
2763 // OPCODE: DW_OP_APPLE_assign
2764 // OPERANDS: none
2765 // DESCRIPTION: Pops a value off of the stack and assigns it to the next
2766 // item on the stack which must be something assignable (inferior
2767 // Variable, inferior Type with address, inferior register, or
2768 // expression local variable.
2769 //----------------------------------------------------------------------
2770 case DW_OP_APPLE_assign:
2771 if (stack.size() < 2)
2772 {
2773 if (error_ptr)
2774 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
2775 return false;
2776 }
2777 else
2778 {
2779 tmp = stack.back();
2780 stack.pop_back();
2781 Value::ContextType context_type = stack.back().GetContextType();
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]2782 StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2783 switch (context_type)
2784 {
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2785 case Value::eContextTypeClangType:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2786 {
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2787 void *clang_type = stack.back().GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2788
2789 if (ClangASTContext::IsAggregateType (clang_type))
2790 {
2791 Value::ValueType source_value_type = tmp.GetValueType();
2792 Value::ValueType target_value_type = stack.back().GetValueType();
2793
2794 addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
2795 addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
2796
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2797 size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2798
2799 switch (source_value_type)
2800 {
Greg Clayton4fdf7602011-03-20 04:57:14 +0000[diff] [blame]2801 case Value::eValueTypeScalar:
2802 case Value::eValueTypeFileAddress:
2803 break;
2804
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2805 case Value::eValueTypeLoadAddress:
2806 switch (target_value_type)
2807 {
2808 case Value::eValueTypeLoadAddress:
2809 {
2810 DataBufferHeap data;
2811 data.SetByteSize(byte_size);
2812
2813 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2814 if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2815 {
2816 if (error_ptr)
2817 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2818 return false;
2819 }
2820
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2821 if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2822 {
2823 if (error_ptr)
2824 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2825 return false;
2826 }
2827 }
2828 break;
2829 case Value::eValueTypeHostAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2830 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2831 {
2832 if (error_ptr)
2833 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2834 return false;
2835 }
2836 else
2837 {
2838 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2839 if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2840 {
2841 if (error_ptr)
2842 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2843 return false;
2844 }
2845 }
2846 break;
2847 default:
2848 return false;
2849 }
2850 break;
2851 case Value::eValueTypeHostAddress:
2852 switch (target_value_type)
2853 {
2854 case Value::eValueTypeLoadAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2855 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2856 {
2857 if (error_ptr)
2858 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2859 return false;
2860 }
2861 else
2862 {
2863 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2864 if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2865 {
2866 if (error_ptr)
2867 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2868 return false;
2869 }
2870 }
2871 case Value::eValueTypeHostAddress:
2872 memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
2873 break;
2874 default:
2875 return false;
2876 }
2877 }
2878 }
2879 else
2880 {
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2881 if (!ClangASTType::SetValueFromScalar (ast_context,
2882 clang_type,
2883 tmp.ResolveValue(exe_ctx, ast_context),
2884 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2885 {
2886 if (error_ptr)
2887 error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
2888 return false;
2889 }
2890
2891 Value::ValueType value_type = stack.back().GetValueType();
2892
2893 switch (value_type)
2894 {
2895 case Value::eValueTypeLoadAddress:
2896 case Value::eValueTypeHostAddress:
2897 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]2898 AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2899 lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2900 if (!ClangASTType::WriteToMemory (ast_context,
2901 clang_type,
2902 exe_ctx,
2903 addr,
2904 address_type,
2905 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2906 {
2907 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]2908 error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%" PRIx64 ".\n", addr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2909 return false;
2910 }
2911 }
2912 break;
2913
2914 default:
2915 break;
2916 }
2917 }
2918 }
2919 break;
2920
2921 default:
2922 if (error_ptr)
2923 error_ptr->SetErrorString ("Assign failed.");
2924 return false;
2925 }
2926 }
2927 break;
2928
2929 //----------------------------------------------------------------------
2930 // OPCODE: DW_OP_APPLE_address_of
2931 // OPERANDS: none
2932 // DESCRIPTION: Pops a value off of the stack and pushed its address.
2933 // The top item on the stack must be a variable, or already be a memory
2934 // location.
2935 //----------------------------------------------------------------------
2936 case DW_OP_APPLE_address_of:
2937 if (stack.empty())
2938 {
2939 if (error_ptr)
2940 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
2941 return false;
2942 }
2943 else
2944 {
2945 Value::ValueType value_type = stack.back().GetValueType();
2946 switch (value_type)
2947 {
2948 default:
2949 case Value::eValueTypeScalar: // raw scalar value
2950 if (error_ptr)
2951 error_ptr->SetErrorString("Top stack item isn't a memory based object.");
2952 return false;
2953
2954 case Value::eValueTypeLoadAddress: // load address value
2955 case Value::eValueTypeFileAddress: // file address value
2956 case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
2957 // Taking the address of an object reduces it to the address
2958 // of the value and removes any extra context it had.
2959 //stack.back().SetValueType(Value::eValueTypeScalar);
2960 stack.back().ClearContext();
2961 break;
2962 }
2963 }
2964 break;
2965
2966 //----------------------------------------------------------------------
2967 // OPCODE: DW_OP_APPLE_value_of
2968 // OPERANDS: none
2969 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2970 // The top item on the stack must be a variable, expression variable.
2971 //----------------------------------------------------------------------
2972 case DW_OP_APPLE_value_of:
2973 if (stack.empty())
2974 {
2975 if (error_ptr)
2976 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
2977 return false;
2978 }
2979 else if (!stack.back().ValueOf(exe_ctx, ast_context))
2980 {
2981 if (error_ptr)
2982 error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
2983 return false;
2984 }
2985 break;
2986
2987 //----------------------------------------------------------------------
2988 // OPCODE: DW_OP_APPLE_deref_type
2989 // OPERANDS: none
2990 // DESCRIPTION: gets the value pointed to by the top stack item
2991 //----------------------------------------------------------------------
2992 case DW_OP_APPLE_deref_type:
2993 {
2994 if (stack.empty())
2995 {
2996 if (error_ptr)
2997 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
2998 return false;
2999 }
3000
3001 tmp = stack.back();
3002 stack.pop_back();
3003
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3004 if (tmp.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3005 {
3006 if (error_ptr)
3007 error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
3008 return false;
3009 }
3010
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]3011 void *ptr_type = tmp.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3012 void *target_type;
3013
3014 if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
3015 {
3016 if (error_ptr)
3017 error_ptr->SetErrorString("Dereferencing a non-pointer type");
3018 return false;
3019 }
3020
3021 // TODO do we want all pointers to be dereferenced as load addresses?
3022 Value::ValueType value_type = tmp.GetValueType();
3023
3024 tmp.ResolveValue(exe_ctx, ast_context);
3025
3026 tmp.SetValueType(value_type);
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3027 tmp.SetContext(Value::eContextTypeClangType, target_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3028
3029 stack.push_back(tmp);
3030 }
3031 break;
3032
3033 //----------------------------------------------------------------------
3034 // OPCODE: DW_OP_APPLE_expr_local
3035 // OPERANDS: ULEB128
3036 // DESCRIPTION: pushes the expression local variable index onto the
3037 // stack and set the appropriate context so we know the stack item is
3038 // an expression local variable index.
3039 //----------------------------------------------------------------------
3040 case DW_OP_APPLE_expr_local:
3041 {
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3042 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3043 uint32_t idx = opcodes.GetULEB128(&offset);
3044 if (expr_locals == NULL)
3045 {
3046 if (error_ptr)
3047 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
3048 return false;
3049 }
3050 Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
3051 if (expr_local_variable == NULL)
3052 {
3053 if (error_ptr)
3054 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
3055 return false;
3056 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3057 // The proxy code has been removed. If it is ever re-added, please
3058 // use shared pointers or return by value to avoid possible memory
3059 // leak (there is no leak here, but in general, no returning pointers
3060 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3061 Value *proxy = expr_local_variable->CreateProxy();
3062 stack.push_back(*proxy);
3063 delete proxy;
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3064 //stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3065 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3066 }
3067 break;
3068
3069 //----------------------------------------------------------------------
3070 // OPCODE: DW_OP_APPLE_extern
3071 // OPERANDS: ULEB128
3072 // DESCRIPTION: pushes a proxy for the extern object index onto the
3073 // stack.
3074 //----------------------------------------------------------------------
3075 case DW_OP_APPLE_extern:
3076 {
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3077 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3078 uint32_t idx = opcodes.GetULEB128(&offset);
3079 if (!decl_map)
3080 {
3081 if (error_ptr)
3082 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
3083 return false;
3084 }
3085 Value *extern_var = decl_map->GetValueForIndex(idx);
3086 if (!extern_var)
3087 {
3088 if (error_ptr)
3089 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
3090 return false;
3091 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3092 // The proxy code has been removed. If it is ever re-added, please
3093 // use shared pointers or return by value to avoid possible memory
3094 // leak (there is no leak here, but in general, no returning pointers
3095 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3096 Value *proxy = extern_var->CreateProxy();
3097 stack.push_back(*proxy);
3098 delete proxy;
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3099 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3100 }
3101 break;
3102
3103 case DW_OP_APPLE_scalar_cast:
3104 if (stack.empty())
3105 {
3106 if (error_ptr)
3107 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
3108 return false;
3109 }
3110 else
3111 {
3112 // Simple scalar cast
3113 if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
3114 {
3115 if (error_ptr)
3116 error_ptr->SetErrorString("Cast failed.");
3117 return false;
3118 }
3119 }
3120 break;
3121
3122
3123 case DW_OP_APPLE_clang_cast:
3124 if (stack.empty())
3125 {
3126 if (error_ptr)
3127 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
3128 return false;
3129 }
3130 else
3131 {
3132 void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3133 stack.back().SetContext (Value::eContextTypeClangType, clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3134 }
3135 break;
3136 //----------------------------------------------------------------------
3137 // OPCODE: DW_OP_APPLE_constf
3138 // OPERANDS: 1 byte float length, followed by that many bytes containing
3139 // the constant float data.
3140 // DESCRIPTION: Push a float value onto the expression stack.
3141 //----------------------------------------------------------------------
3142 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
3143 {
3144 uint8_t float_length = opcodes.GetU8(&offset);
3145 if (sizeof(float) == float_length)
3146 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
3147 else if (sizeof(double) == float_length)
3148 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
3149 else if (sizeof(long double) == float_length)
3150 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
3151 else
3152 {
3153 StreamString new_value;
3154 opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
3155
3156 if (error_ptr)
3157 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
3158 return false;
3159 }
3160 tmp.SetValueType(Value::eValueTypeScalar);
3161 tmp.ClearContext();
3162 stack.push_back(tmp);
3163 }
3164 break;
3165 //----------------------------------------------------------------------
3166 // OPCODE: DW_OP_APPLE_clear
3167 // OPERANDS: none
3168 // DESCRIPTION: Clears the expression stack.
3169 //----------------------------------------------------------------------
3170 case DW_OP_APPLE_clear:
3171 stack.clear();
3172 break;
3173
3174 //----------------------------------------------------------------------
3175 // OPCODE: DW_OP_APPLE_error
3176 // OPERANDS: none
3177 // DESCRIPTION: Pops a value off of the stack and pushed its value.
3178 // The top item on the stack must be a variable, expression variable.
3179 //----------------------------------------------------------------------
3180 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
3181 if (error_ptr)
3182 error_ptr->SetErrorString ("Generic error.");
3183 return false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]3184#endif // #if 0
3185
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3186 }
3187 }
3188
3189 if (stack.empty())
3190 {
3191 if (error_ptr)
3192 error_ptr->SetErrorString ("Stack empty after evaluation.");
3193 return false;
3194 }
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]3195 else if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3196 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3197 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]3198 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3199 for (size_t i=0; i<count; ++i)
3200 {
3201 StreamString new_value;
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]3202 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3203 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]3204 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3205 }
3206 }
3207
3208 result = stack.back();
3209 return true; // Return true on success
3210}
3211