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gerrit-public.fairphone.software / fp2-dev / platform / external / lldb / 4237e1ea921ebd588b29319bf12050ba737fbca2 / . / source / Expression / DWARFExpression.cpp
blob: 6ce82015ce92ba5d8964d8d19800adc14c3713f0 [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 Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]236DWARFExpression::DWARFExpression(const DataExtractor& data, uint32_t data_offset, uint32_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 Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]264DWARFExpression::SetOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]265{
266 m_data.SetData(data, data_offset, data_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]267}
268
269void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]270DWARFExpression::DumpLocation (Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]271{
272 if (!m_data.ValidOffsetForDataOfSize(offset, length))
273 return;
274 const uint32_t start_offset = offset;
275 const uint32_t end_offset = offset + length;
276 while (m_data.ValidOffset(offset) && offset < end_offset)
277 {
278 const uint32_t op_offset = offset;
279 const uint8_t op = m_data.GetU8(&offset);
280
281 switch (level)
282 {
Greg Clayton54e7afa2010-07-09 20:39:50 +0000[diff] [blame]283 default:
284 break;
285
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]286 case lldb::eDescriptionLevelBrief:
287 if (offset > start_offset)
288 s->PutChar(' ');
289 break;
290
291 case lldb::eDescriptionLevelFull:
292 case lldb::eDescriptionLevelVerbose:
293 if (offset > start_offset)
294 s->EOL();
295 s->Indent();
296 if (level == lldb::eDescriptionLevelFull)
297 break;
298 // Fall through for verbose and print offset and DW_OP prefix..
299 s->Printf("0x%8.8x: %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
300 break;
301 }
302
303 switch (op)
304 {
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]305 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
306 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
307 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
308 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
309 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
310 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
311 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
312 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
313 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
314 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]315 case DW_OP_constu: s->Printf("DW_OP_constu(0x%llx) ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
316 case DW_OP_consts: s->Printf("DW_OP_consts(0x%lld) ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]317 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
318 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
319 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
320 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
321 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
322 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
323 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
324 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
325 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
326 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
327 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
328 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
329 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
330 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
331 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
332 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
333 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]334 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]335 s->Printf("DW_OP_plus_uconst(0x%llx) ", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]336 break;
337
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]338 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
339 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
340 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
341 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
342 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
343 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
344 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
345 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
346 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
347 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
348 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
349 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]350
351 case DW_OP_lit0: // 0x30
352 case DW_OP_lit1: // 0x31
353 case DW_OP_lit2: // 0x32
354 case DW_OP_lit3: // 0x33
355 case DW_OP_lit4: // 0x34
356 case DW_OP_lit5: // 0x35
357 case DW_OP_lit6: // 0x36
358 case DW_OP_lit7: // 0x37
359 case DW_OP_lit8: // 0x38
360 case DW_OP_lit9: // 0x39
361 case DW_OP_lit10: // 0x3A
362 case DW_OP_lit11: // 0x3B
363 case DW_OP_lit12: // 0x3C
364 case DW_OP_lit13: // 0x3D
365 case DW_OP_lit14: // 0x3E
366 case DW_OP_lit15: // 0x3F
367 case DW_OP_lit16: // 0x40
368 case DW_OP_lit17: // 0x41
369 case DW_OP_lit18: // 0x42
370 case DW_OP_lit19: // 0x43
371 case DW_OP_lit20: // 0x44
372 case DW_OP_lit21: // 0x45
373 case DW_OP_lit22: // 0x46
374 case DW_OP_lit23: // 0x47
375 case DW_OP_lit24: // 0x48
376 case DW_OP_lit25: // 0x49
377 case DW_OP_lit26: // 0x4A
378 case DW_OP_lit27: // 0x4B
379 case DW_OP_lit28: // 0x4C
380 case DW_OP_lit29: // 0x4D
381 case DW_OP_lit30: // 0x4E
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]382 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]383
384 case DW_OP_reg0: // 0x50
385 case DW_OP_reg1: // 0x51
386 case DW_OP_reg2: // 0x52
387 case DW_OP_reg3: // 0x53
388 case DW_OP_reg4: // 0x54
389 case DW_OP_reg5: // 0x55
390 case DW_OP_reg6: // 0x56
391 case DW_OP_reg7: // 0x57
392 case DW_OP_reg8: // 0x58
393 case DW_OP_reg9: // 0x59
394 case DW_OP_reg10: // 0x5A
395 case DW_OP_reg11: // 0x5B
396 case DW_OP_reg12: // 0x5C
397 case DW_OP_reg13: // 0x5D
398 case DW_OP_reg14: // 0x5E
399 case DW_OP_reg15: // 0x5F
400 case DW_OP_reg16: // 0x60
401 case DW_OP_reg17: // 0x61
402 case DW_OP_reg18: // 0x62
403 case DW_OP_reg19: // 0x63
404 case DW_OP_reg20: // 0x64
405 case DW_OP_reg21: // 0x65
406 case DW_OP_reg22: // 0x66
407 case DW_OP_reg23: // 0x67
408 case DW_OP_reg24: // 0x68
409 case DW_OP_reg25: // 0x69
410 case DW_OP_reg26: // 0x6A
411 case DW_OP_reg27: // 0x6B
412 case DW_OP_reg28: // 0x6C
413 case DW_OP_reg29: // 0x6D
414 case DW_OP_reg30: // 0x6E
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]415 case DW_OP_reg31: // 0x6F
416 {
417 uint32_t reg_num = op - DW_OP_reg0;
418 if (abi)
419 {
420 RegisterInfo reg_info;
421 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
422 {
423 if (reg_info.name)
424 {
425 s->PutCString (reg_info.name);
426 break;
427 }
428 else if (reg_info.alt_name)
429 {
430 s->PutCString (reg_info.alt_name);
431 break;
432 }
433 }
434 }
435 s->Printf("DW_OP_reg%u", reg_num); break;
436 }
437 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]438
439 case DW_OP_breg0:
440 case DW_OP_breg1:
441 case DW_OP_breg2:
442 case DW_OP_breg3:
443 case DW_OP_breg4:
444 case DW_OP_breg5:
445 case DW_OP_breg6:
446 case DW_OP_breg7:
447 case DW_OP_breg8:
448 case DW_OP_breg9:
449 case DW_OP_breg10:
450 case DW_OP_breg11:
451 case DW_OP_breg12:
452 case DW_OP_breg13:
453 case DW_OP_breg14:
454 case DW_OP_breg15:
455 case DW_OP_breg16:
456 case DW_OP_breg17:
457 case DW_OP_breg18:
458 case DW_OP_breg19:
459 case DW_OP_breg20:
460 case DW_OP_breg21:
461 case DW_OP_breg22:
462 case DW_OP_breg23:
463 case DW_OP_breg24:
464 case DW_OP_breg25:
465 case DW_OP_breg26:
466 case DW_OP_breg27:
467 case DW_OP_breg28:
468 case DW_OP_breg29:
469 case DW_OP_breg30:
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]470 case DW_OP_breg31:
471 {
472 uint32_t reg_num = op - DW_OP_breg0;
473 int64_t reg_offset = m_data.GetSLEB128(&offset);
474 if (abi)
475 {
476 RegisterInfo reg_info;
477 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
478 {
479 if (reg_info.name)
480 {
481 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
482 break;
483 }
484 else if (reg_info.alt_name)
485 {
486 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
487 break;
488 }
489 }
490 }
491 s->Printf("DW_OP_breg%i(0x%llx)", reg_num, reg_offset);
492 }
493 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]494
495 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]496 {
497 uint64_t reg_num = m_data.GetULEB128(&offset);
498 if (abi)
499 {
500 RegisterInfo reg_info;
501 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
502 {
503 if (reg_info.name)
504 {
505 s->PutCString (reg_info.name);
506 break;
507 }
508 else if (reg_info.alt_name)
509 {
510 s->PutCString (reg_info.alt_name);
511 break;
512 }
513 }
514 }
515 s->Printf("DW_OP_regx(%llu)", reg_num); break;
516 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]517 break;
518 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]519 s->Printf("DW_OP_fbreg(%lli)",m_data.GetSLEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]520 break;
521 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]522 {
523 uint32_t reg_num = m_data.GetULEB128(&offset);
524 int64_t reg_offset = m_data.GetSLEB128(&offset);
525 if (abi)
526 {
527 RegisterInfo reg_info;
528 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
529 {
530 if (reg_info.name)
531 {
532 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
533 break;
534 }
535 else if (reg_info.alt_name)
536 {
537 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
538 break;
539 }
540 }
541 }
542 s->Printf("DW_OP_bregx(reg=%u,offset=%lli)", reg_num, reg_offset);
543 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]544 break;
545 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]546 s->Printf("DW_OP_piece(0x%llx)", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]547 break;
548 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]549 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]550 break;
551 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]552 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]553 break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]554 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
555 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]556 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]557 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]558 break;
559 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]560 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]561 break;
562 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]563 s->Printf("DW_OP_call_ref(0x%8.8llx)", m_data.GetAddress(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]564 break;
565// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
566// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
567// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]568// 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]569// break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]570// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
571// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]572// case DW_OP_APPLE_extern:
573// s->Printf("DW_OP_APPLE_extern(%llu)", m_data.GetULEB128(&offset));
574// break;
575// case DW_OP_APPLE_array_ref:
576// s->PutCString("DW_OP_APPLE_array_ref");
577// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]578 case DW_OP_APPLE_uninit:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]579 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]580 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]581// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
582// s->PutCString("DW_OP_APPLE_assign");
583// break;
584// 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)
585// s->PutCString("DW_OP_APPLE_address_of");
586// break;
587// 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)
588// s->PutCString("DW_OP_APPLE_value_of");
589// break;
590// 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)
591// s->PutCString("DW_OP_APPLE_deref_type");
592// break;
593// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
594// s->Printf("DW_OP_APPLE_expr_local(%llu)", m_data.GetULEB128(&offset));
595// break;
596// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
597// {
598// uint8_t float_length = m_data.GetU8(&offset);
599// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
600// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
601// s->PutChar(')');
602// // Consume the float data
603// m_data.GetData(&offset, float_length);
604// }
605// break;
606// case DW_OP_APPLE_scalar_cast:
607// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
608// break;
609// case DW_OP_APPLE_clang_cast:
610// {
611// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
612// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
613// }
614// break;
615// case DW_OP_APPLE_clear:
616// s->PutCString("DW_OP_APPLE_clear");
617// break;
618// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
619// s->PutCString("DW_OP_APPLE_error");
620// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]621 }
622 }
623}
624
625void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]626DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]627{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]628 m_loclist_slide = slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]629}
630
631int
632DWARFExpression::GetRegisterKind ()
633{
634 return m_reg_kind;
635}
636
637void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]638DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]639{
640 m_reg_kind = reg_kind;
641}
642
643bool
644DWARFExpression::IsLocationList() const
645{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]646 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]647}
648
649void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]650DWARFExpression::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]651{
652 if (IsLocationList())
653 {
654 // We have a location list
655 uint32_t offset = 0;
656 uint32_t count = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]657 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]658 while (m_data.ValidOffset(offset))
659 {
660 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
661 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
662 if (begin_addr_offset < end_addr_offset)
663 {
664 if (count > 0)
665 s->PutCString(", ");
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]666 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
667 addr_range.Dump(s, 0, 8);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]668 s->PutChar('{');
669 uint32_t location_length = m_data.GetU16(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]670 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]671 s->PutChar('}');
672 offset += location_length;
673 }
674 else if (begin_addr_offset == 0 && end_addr_offset == 0)
675 {
676 // The end of the location list is marked by both the start and end offset being zero
677 break;
678 }
679 else
680 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]681 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
682 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]683 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]684 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]685 // We have a new base address
686 if (count > 0)
687 s->PutCString(", ");
688 *s << "base_addr = " << end_addr_offset;
689 }
690 }
691
692 count++;
693 }
694 }
695 else
696 {
697 // We have a normal location that contains DW_OP location opcodes
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]698 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]699 }
700}
701
702static bool
703ReadRegisterValueAsScalar
704(
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]705 RegisterContext *reg_ctx,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]706 uint32_t reg_kind,
707 uint32_t reg_num,
708 Error *error_ptr,
709 Value &value
710)
711{
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]712 if (reg_ctx == NULL)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]713 {
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]714 if (error_ptr)
715 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]716 }
717 else
718 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]719 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]720 if (native_reg == LLDB_INVALID_REGNUM)
721 {
722 if (error_ptr)
723 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
724 }
725 else
726 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]727 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
728 RegisterValue reg_value;
729 if (reg_ctx->ReadRegister (reg_info, reg_value))
730 {
731 if (reg_value.GetScalarValue(value.GetScalar()))
732 {
733 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]734 value.SetContext (Value::eContextTypeRegisterInfo,
735 const_cast<RegisterInfo *>(reg_info));
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]736 if (error_ptr)
737 error_ptr->Clear();
738 return true;
739 }
740 else
741 {
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]742 // If we get this error, then we need to implement a value
743 // buffer in the dwarf expression evaluation function...
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]744 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]745 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
746 reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]747 }
748 }
749 else
750 {
751 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]752 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]753 }
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]754 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]755 }
756 return false;
757}
758
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]759//bool
760//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
761//{
762// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
763//}
764//
765//bool
766//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
767//{
768// if (load_addr == LLDB_INVALID_ADDRESS)
769// return false;
770//
771// if (IsLocationList())
772// {
773// uint32_t offset = 0;
774//
775// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
776//
777// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
778// return false;
779//
780// while (m_data.ValidOffset(offset))
781// {
782// // We need to figure out what the value is for the location.
783// addr_t lo_pc = m_data.GetAddress(&offset);
784// addr_t hi_pc = m_data.GetAddress(&offset);
785// if (lo_pc == 0 && hi_pc == 0)
786// break;
787// else
788// {
789// lo_pc += loc_list_base_addr;
790// hi_pc += loc_list_base_addr;
791//
792// if (lo_pc <= load_addr && load_addr < hi_pc)
793// return true;
794//
795// offset += m_data.GetU16(&offset);
796// }
797// }
798// }
799// return false;
800//}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]801
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]802static uint32_t
803GetOpcodeDataSize (const DataExtractor &data, const uint32_t data_offset, const uint8_t op)
804{
805 uint32_t offset = data_offset;
806 switch (op)
807 {
808 case DW_OP_addr:
809 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
810 return data.GetAddressByteSize();
811
812 // Opcodes with no arguments
813 case DW_OP_deref: // 0x06
814 case DW_OP_dup: // 0x12
815 case DW_OP_drop: // 0x13
816 case DW_OP_over: // 0x14
817 case DW_OP_swap: // 0x16
818 case DW_OP_rot: // 0x17
819 case DW_OP_xderef: // 0x18
820 case DW_OP_abs: // 0x19
821 case DW_OP_and: // 0x1a
822 case DW_OP_div: // 0x1b
823 case DW_OP_minus: // 0x1c
824 case DW_OP_mod: // 0x1d
825 case DW_OP_mul: // 0x1e
826 case DW_OP_neg: // 0x1f
827 case DW_OP_not: // 0x20
828 case DW_OP_or: // 0x21
829 case DW_OP_plus: // 0x22
830 case DW_OP_shl: // 0x24
831 case DW_OP_shr: // 0x25
832 case DW_OP_shra: // 0x26
833 case DW_OP_xor: // 0x27
834 case DW_OP_eq: // 0x29
835 case DW_OP_ge: // 0x2a
836 case DW_OP_gt: // 0x2b
837 case DW_OP_le: // 0x2c
838 case DW_OP_lt: // 0x2d
839 case DW_OP_ne: // 0x2e
840 case DW_OP_lit0: // 0x30
841 case DW_OP_lit1: // 0x31
842 case DW_OP_lit2: // 0x32
843 case DW_OP_lit3: // 0x33
844 case DW_OP_lit4: // 0x34
845 case DW_OP_lit5: // 0x35
846 case DW_OP_lit6: // 0x36
847 case DW_OP_lit7: // 0x37
848 case DW_OP_lit8: // 0x38
849 case DW_OP_lit9: // 0x39
850 case DW_OP_lit10: // 0x3A
851 case DW_OP_lit11: // 0x3B
852 case DW_OP_lit12: // 0x3C
853 case DW_OP_lit13: // 0x3D
854 case DW_OP_lit14: // 0x3E
855 case DW_OP_lit15: // 0x3F
856 case DW_OP_lit16: // 0x40
857 case DW_OP_lit17: // 0x41
858 case DW_OP_lit18: // 0x42
859 case DW_OP_lit19: // 0x43
860 case DW_OP_lit20: // 0x44
861 case DW_OP_lit21: // 0x45
862 case DW_OP_lit22: // 0x46
863 case DW_OP_lit23: // 0x47
864 case DW_OP_lit24: // 0x48
865 case DW_OP_lit25: // 0x49
866 case DW_OP_lit26: // 0x4A
867 case DW_OP_lit27: // 0x4B
868 case DW_OP_lit28: // 0x4C
869 case DW_OP_lit29: // 0x4D
870 case DW_OP_lit30: // 0x4E
871 case DW_OP_lit31: // 0x4f
872 case DW_OP_reg0: // 0x50
873 case DW_OP_reg1: // 0x51
874 case DW_OP_reg2: // 0x52
875 case DW_OP_reg3: // 0x53
876 case DW_OP_reg4: // 0x54
877 case DW_OP_reg5: // 0x55
878 case DW_OP_reg6: // 0x56
879 case DW_OP_reg7: // 0x57
880 case DW_OP_reg8: // 0x58
881 case DW_OP_reg9: // 0x59
882 case DW_OP_reg10: // 0x5A
883 case DW_OP_reg11: // 0x5B
884 case DW_OP_reg12: // 0x5C
885 case DW_OP_reg13: // 0x5D
886 case DW_OP_reg14: // 0x5E
887 case DW_OP_reg15: // 0x5F
888 case DW_OP_reg16: // 0x60
889 case DW_OP_reg17: // 0x61
890 case DW_OP_reg18: // 0x62
891 case DW_OP_reg19: // 0x63
892 case DW_OP_reg20: // 0x64
893 case DW_OP_reg21: // 0x65
894 case DW_OP_reg22: // 0x66
895 case DW_OP_reg23: // 0x67
896 case DW_OP_reg24: // 0x68
897 case DW_OP_reg25: // 0x69
898 case DW_OP_reg26: // 0x6A
899 case DW_OP_reg27: // 0x6B
900 case DW_OP_reg28: // 0x6C
901 case DW_OP_reg29: // 0x6D
902 case DW_OP_reg30: // 0x6E
903 case DW_OP_reg31: // 0x6F
904 case DW_OP_nop: // 0x96
905 case DW_OP_push_object_address: // 0x97 DWARF3
906 case DW_OP_form_tls_address: // 0x9b DWARF3
907 case DW_OP_call_frame_cfa: // 0x9c DWARF3
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]908 case DW_OP_stack_value: // 0x9f DWARF4
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]909 return 0;
910
911 // Opcodes with a single 1 byte arguments
912 case DW_OP_const1u: // 0x08 1 1-byte constant
913 case DW_OP_const1s: // 0x09 1 1-byte constant
914 case DW_OP_pick: // 0x15 1 1-byte stack index
915 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
916 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
917 return 1;
918
919 // Opcodes with a single 2 byte arguments
920 case DW_OP_const2u: // 0x0a 1 2-byte constant
921 case DW_OP_const2s: // 0x0b 1 2-byte constant
922 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
923 case DW_OP_bra: // 0x28 1 signed 2-byte constant
924 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
925 return 2;
926
927 // Opcodes with a single 4 byte arguments
928 case DW_OP_const4u: // 0x0c 1 4-byte constant
929 case DW_OP_const4s: // 0x0d 1 4-byte constant
930 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
931 return 4;
932
933 // Opcodes with a single 8 byte arguments
934 case DW_OP_const8u: // 0x0e 1 8-byte constant
935 case DW_OP_const8s: // 0x0f 1 8-byte constant
936 return 8;
937
938 // All opcodes that have a single ULEB (signed or unsigned) argument
939 case DW_OP_constu: // 0x10 1 ULEB128 constant
940 case DW_OP_consts: // 0x11 1 SLEB128 constant
941 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
942 case DW_OP_breg0: // 0x70 1 ULEB128 register
943 case DW_OP_breg1: // 0x71 1 ULEB128 register
944 case DW_OP_breg2: // 0x72 1 ULEB128 register
945 case DW_OP_breg3: // 0x73 1 ULEB128 register
946 case DW_OP_breg4: // 0x74 1 ULEB128 register
947 case DW_OP_breg5: // 0x75 1 ULEB128 register
948 case DW_OP_breg6: // 0x76 1 ULEB128 register
949 case DW_OP_breg7: // 0x77 1 ULEB128 register
950 case DW_OP_breg8: // 0x78 1 ULEB128 register
951 case DW_OP_breg9: // 0x79 1 ULEB128 register
952 case DW_OP_breg10: // 0x7a 1 ULEB128 register
953 case DW_OP_breg11: // 0x7b 1 ULEB128 register
954 case DW_OP_breg12: // 0x7c 1 ULEB128 register
955 case DW_OP_breg13: // 0x7d 1 ULEB128 register
956 case DW_OP_breg14: // 0x7e 1 ULEB128 register
957 case DW_OP_breg15: // 0x7f 1 ULEB128 register
958 case DW_OP_breg16: // 0x80 1 ULEB128 register
959 case DW_OP_breg17: // 0x81 1 ULEB128 register
960 case DW_OP_breg18: // 0x82 1 ULEB128 register
961 case DW_OP_breg19: // 0x83 1 ULEB128 register
962 case DW_OP_breg20: // 0x84 1 ULEB128 register
963 case DW_OP_breg21: // 0x85 1 ULEB128 register
964 case DW_OP_breg22: // 0x86 1 ULEB128 register
965 case DW_OP_breg23: // 0x87 1 ULEB128 register
966 case DW_OP_breg24: // 0x88 1 ULEB128 register
967 case DW_OP_breg25: // 0x89 1 ULEB128 register
968 case DW_OP_breg26: // 0x8a 1 ULEB128 register
969 case DW_OP_breg27: // 0x8b 1 ULEB128 register
970 case DW_OP_breg28: // 0x8c 1 ULEB128 register
971 case DW_OP_breg29: // 0x8d 1 ULEB128 register
972 case DW_OP_breg30: // 0x8e 1 ULEB128 register
973 case DW_OP_breg31: // 0x8f 1 ULEB128 register
974 case DW_OP_regx: // 0x90 1 ULEB128 register
975 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
976 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
977 data.Skip_LEB128(&offset);
978 return offset - data_offset;
979
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]980 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]981 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
982 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
983 data.Skip_LEB128(&offset);
984 data.Skip_LEB128(&offset);
985 return offset - data_offset;
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]986
987 case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
988 {
989 uint64_t block_len = data.Skip_LEB128(&offset);
990 offset += block_len;
991 return offset - data_offset;
992 }
993
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]994 default:
Jim Ingham8521b842011-12-01 03:01:30 +0000[diff] [blame]995 {
996 Host::SetCrashDescriptionWithFormat ("Unhandled DW_OP_XXX opcode: %d, add support for it.", op);
Jim Ingham9f5c6142011-12-07 20:10:58 +0000[diff] [blame]997 assert (!"Unhandled DW_OP_XXX opcode - look for actual value in Crash Description string.");
Jim Ingham8521b842011-12-01 03:01:30 +0000[diff] [blame]998 }
999 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1000 }
1001 return UINT32_MAX;
1002}
1003
1004bool
1005DWARFExpression::LocationContains_DW_OP_addr (lldb::addr_t file_addr) const
1006{
1007 if (IsLocationList())
1008 return false;
1009 uint32_t offset = 0;
1010 while (m_data.ValidOffset(offset))
1011 {
1012 const uint8_t op = m_data.GetU8(&offset);
1013
1014 if (op == DW_OP_addr)
1015 {
1016 if (file_addr == LLDB_INVALID_ADDRESS)
1017 return true;
1018 addr_t op_file_addr = m_data.GetAddress(&offset);
1019 if (op_file_addr == file_addr)
1020 return true;
1021 }
1022 else
1023 {
1024 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1025 if (op_arg_size == UINT32_MAX)
1026 break;
1027 offset += op_arg_size;
1028 }
1029 }
1030 return false;
1031}
1032
1033bool
1034DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1035{
1036 if (IsLocationList())
1037 return false;
1038 uint32_t offset = 0;
1039 while (m_data.ValidOffset(offset))
1040 {
1041 const uint8_t op = m_data.GetU8(&offset);
1042
1043 if (op == DW_OP_addr)
1044 {
1045 const uint8_t addr_byte_size = m_data.GetAddressByteSize();
1046 // We have to make a copy of the data as we don't know if this
1047 // data is from a read only memory mapped buffer, so we duplicate
1048 // all of the data first, then modify it, and if all goes well,
1049 // we then replace the data for this expression
1050
1051 // So first we copy the data into a heap buffer
1052 std::auto_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
1053 m_data.GetByteSize()));
1054
1055 // Make en encoder so we can write the address into the buffer using
1056 // the correct byte order (endianness)
1057 DataEncoder encoder (head_data_ap->GetBytes(),
1058 head_data_ap->GetByteSize(),
1059 m_data.GetByteOrder(),
1060 addr_byte_size);
1061
1062 // Replace the address in the new buffer
1063 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1064 return false;
1065
1066 // All went well, so now we can reset the data using a shared
1067 // pointer to the heap data so "m_data" will now correctly
1068 // manage the heap data.
1069 m_data.SetData (DataBufferSP (head_data_ap.release()));
1070 return true;
1071 }
1072 else
1073 {
1074 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1075 if (op_arg_size == UINT32_MAX)
1076 break;
1077 offset += op_arg_size;
1078 }
1079 }
1080 return false;
1081}
1082
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1083bool
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1084DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1085{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1086 if (addr == LLDB_INVALID_ADDRESS)
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1087 return false;
1088
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1089 if (IsLocationList())
1090 {
1091 uint32_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1092
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1093 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1094 return false;
1095
1096 while (m_data.ValidOffset(offset))
1097 {
1098 // We need to figure out what the value is for the location.
1099 addr_t lo_pc = m_data.GetAddress(&offset);
1100 addr_t hi_pc = m_data.GetAddress(&offset);
1101 if (lo_pc == 0 && hi_pc == 0)
1102 break;
1103 else
1104 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1105 lo_pc += loclist_base_addr - m_loclist_slide;
1106 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1107
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1108 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1109 return true;
1110
1111 offset += m_data.GetU16(&offset);
1112 }
1113 }
1114 }
1115 return false;
1116}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1117
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1118bool
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1119DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, uint32_t &offset, uint32_t &length)
1120{
1121 offset = 0;
1122 if (!IsLocationList())
1123 {
1124 length = m_data.GetByteSize();
1125 return true;
1126 }
1127
1128 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1129 {
1130 addr_t curr_base_addr = base_addr;
1131
1132 while (m_data.ValidOffset(offset))
1133 {
1134 // We need to figure out what the value is for the location.
1135 addr_t lo_pc = m_data.GetAddress(&offset);
1136 addr_t hi_pc = m_data.GetAddress(&offset);
1137 if (lo_pc == 0 && hi_pc == 0)
1138 {
1139 break;
1140 }
1141 else
1142 {
1143 lo_pc += curr_base_addr - m_loclist_slide;
1144 hi_pc += curr_base_addr - m_loclist_slide;
1145
1146 length = m_data.GetU16(&offset);
1147
1148 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1149 return true;
1150
1151 offset += length;
1152 }
1153 }
1154 }
1155 offset = UINT32_MAX;
1156 length = 0;
1157 return false;
1158}
1159
1160bool
1161DWARFExpression::DumpLocationForAddress (Stream *s,
1162 lldb::DescriptionLevel level,
1163 addr_t base_addr,
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1164 addr_t address,
1165 ABI *abi)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1166{
1167 uint32_t offset = 0;
1168 uint32_t length = 0;
1169
1170 if (GetLocation (base_addr, address, offset, length))
1171 {
1172 if (length > 0)
1173 {
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1174 DumpLocation(s, offset, length, level, abi);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1175 return true;
1176 }
1177 }
1178 return false;
1179}
1180
1181bool
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1182DWARFExpression::Evaluate
1183(
1184 ExecutionContextScope *exe_scope,
1185 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1186 ClangExpressionVariableList *expr_locals,
1187 ClangExpressionDeclMap *decl_map,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1188 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1189 const Value* initial_value_ptr,
1190 Value& result,
1191 Error *error_ptr
1192) const
1193{
1194 ExecutionContext exe_ctx (exe_scope);
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1195 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]1196}
1197
1198bool
1199DWARFExpression::Evaluate
1200(
1201 ExecutionContext *exe_ctx,
1202 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1203 ClangExpressionVariableList *expr_locals,
1204 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1205 RegisterContext *reg_ctx,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1206 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1207 const Value* initial_value_ptr,
1208 Value& result,
1209 Error *error_ptr
1210) const
1211{
1212 if (IsLocationList())
1213 {
1214 uint32_t offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1215 addr_t pc;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1216 StackFrame *frame = NULL;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1217 if (reg_ctx)
1218 pc = reg_ctx->GetPC();
1219 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1220 {
1221 frame = exe_ctx->GetFramePtr();
1222 pc = frame->GetRegisterContext()->GetPC();
1223 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1224
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1225 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1226 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1227 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1228 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1229 if (error_ptr)
1230 error_ptr->SetErrorString("Invalid PC in frame.");
1231 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1232 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1233
1234 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1235
1236 while (m_data.ValidOffset(offset))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1237 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1238 // We need to figure out what the value is for the location.
1239 addr_t lo_pc = m_data.GetAddress(&offset);
1240 addr_t hi_pc = m_data.GetAddress(&offset);
1241 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1242 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1243 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1244 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1245 else
1246 {
1247 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1248 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1249
1250 uint16_t length = m_data.GetU16(&offset);
1251
1252 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1253 {
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1254 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]1255 }
1256 offset += length;
1257 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1258 }
1259 }
1260 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]1261 error_ptr->SetErrorString ("variable not available");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1262 return false;
1263 }
1264
1265 // Not a location list, just a single expression.
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1266 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]1267}
1268
1269
1270
1271bool
1272DWARFExpression::Evaluate
1273(
1274 ExecutionContext *exe_ctx,
1275 clang::ASTContext *ast_context,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1276 ClangExpressionVariableList *expr_locals,
1277 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1278 RegisterContext *reg_ctx,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1279 const DataExtractor& opcodes,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1280 const uint32_t opcodes_offset,
1281 const uint32_t opcodes_length,
1282 const uint32_t reg_kind,
1283 const Value* initial_value_ptr,
1284 Value& result,
1285 Error *error_ptr
1286)
1287{
1288 std::vector<Value> stack;
1289
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1290 Process *process = NULL;
1291 StackFrame *frame = NULL;
1292
1293 if (exe_ctx)
1294 {
1295 process = exe_ctx->GetProcessPtr();
1296 frame = exe_ctx->GetFramePtr();
1297 }
1298 if (reg_ctx == NULL && frame)
1299 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1300
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1301 if (initial_value_ptr)
1302 stack.push_back(*initial_value_ptr);
1303
1304 uint32_t offset = opcodes_offset;
1305 const uint32_t end_offset = opcodes_offset + opcodes_length;
1306 Value tmp;
1307 uint32_t reg_num;
1308
1309 // Make sure all of the data is available in opcodes.
1310 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1311 {
1312 if (error_ptr)
1313 error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
1314 return false;
1315 }
Greg Claytone005f2c2010-11-06 01:53:30 +0000[diff] [blame]1316 LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1317
1318
1319 while (opcodes.ValidOffset(offset) && offset < end_offset)
1320 {
1321 const uint32_t op_offset = offset;
1322 const uint8_t op = opcodes.GetU8(&offset);
1323
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]1324 if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1325 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1326 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]1327 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1328 for (size_t i=0; i<count; ++i)
1329 {
1330 StreamString new_value;
1331 new_value.Printf("[%zu]", i);
1332 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]1333 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1334 }
1335 log->Printf("0x%8.8x: %s", op_offset, DW_OP_value_to_name(op));
1336 }
1337 switch (op)
1338 {
1339 //----------------------------------------------------------------------
1340 // The DW_OP_addr operation has a single operand that encodes a machine
1341 // address and whose size is the size of an address on the target machine.
1342 //----------------------------------------------------------------------
1343 case DW_OP_addr:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1344 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1345 stack.back().SetValueType (Value::eValueTypeFileAddress);
1346 break;
1347
1348 //----------------------------------------------------------------------
1349 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1350 // shared libraries that have a location like:
1351 // DW_OP_addr(0x1000)
1352 // If this address resides in a shared library, then this virtual
1353 // address won't make sense when it is evaluated in the context of a
1354 // running process where shared libraries have been slid. To account for
1355 // this, this new address type where we can store the section pointer
1356 // and a 4 byte offset.
1357 //----------------------------------------------------------------------
1358// case DW_OP_addr_sect_offset4:
1359// {
1360// result_type = eResultTypeFileAddress;
1361// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1362// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1363//
1364// Address so_addr (sect, sect_offset);
1365// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1366// if (load_addr != LLDB_INVALID_ADDRESS)
1367// {
1368// // We successfully resolve a file address to a load
1369// // address.
1370// stack.push_back(load_addr);
1371// break;
1372// }
1373// else
1374// {
1375// // We were able
1376// if (error_ptr)
1377// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1378// return false;
1379// }
1380// }
1381// break;
1382
1383 //----------------------------------------------------------------------
1384 // OPCODE: DW_OP_deref
1385 // OPERANDS: none
1386 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1387 // The value retrieved from that address is pushed. The size of the
1388 // data retrieved from the dereferenced address is the size of an
1389 // address on the target machine.
1390 //----------------------------------------------------------------------
1391 case DW_OP_deref:
1392 {
1393 Value::ValueType value_type = stack.back().GetValueType();
1394 switch (value_type)
1395 {
1396 case Value::eValueTypeHostAddress:
1397 {
1398 void *src = (void *)stack.back().GetScalar().ULongLong();
1399 intptr_t ptr;
1400 ::memcpy (&ptr, src, sizeof(void *));
1401 stack.back().GetScalar() = ptr;
1402 stack.back().ClearContext();
1403 }
1404 break;
1405 case Value::eValueTypeLoadAddress:
1406 if (exe_ctx)
1407 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1408 if (process)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1409 {
1410 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1411 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1412 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1413 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1414 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1415 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1416 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1417 uint32_t addr_data_offset = 0;
1418 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1419 stack.back().ClearContext();
1420 }
1421 else
1422 {
1423 if (error_ptr)
1424 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1425 pointer_addr,
1426 error.AsCString());
1427 return false;
1428 }
1429 }
1430 else
1431 {
1432 if (error_ptr)
1433 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1434 return false;
1435 }
1436 }
1437 else
1438 {
1439 if (error_ptr)
1440 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1441 return false;
1442 }
1443 break;
1444
1445 default:
1446 break;
1447 }
1448
1449 }
1450 break;
1451
1452 //----------------------------------------------------------------------
1453 // OPCODE: DW_OP_deref_size
1454 // OPERANDS: 1
1455 // 1 - uint8_t that specifies the size of the data to dereference.
1456 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1457 // stack entry and treats it as an address. The value retrieved from that
1458 // address is pushed. In the DW_OP_deref_size operation, however, the
1459 // size in bytes of the data retrieved from the dereferenced address is
1460 // specified by the single operand. This operand is a 1-byte unsigned
1461 // integral constant whose value may not be larger than the size of an
1462 // address on the target machine. The data retrieved is zero extended
1463 // to the size of an address on the target machine before being pushed
1464 // on the expression stack.
1465 //----------------------------------------------------------------------
1466 case DW_OP_deref_size:
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1467 {
1468 uint8_t size = opcodes.GetU8(&offset);
1469 Value::ValueType value_type = stack.back().GetValueType();
1470 switch (value_type)
1471 {
1472 case Value::eValueTypeHostAddress:
1473 {
1474 void *src = (void *)stack.back().GetScalar().ULongLong();
1475 intptr_t ptr;
1476 ::memcpy (&ptr, src, sizeof(void *));
1477 // I can't decide whether the size operand should apply to the bytes in their
1478 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1479 // but I'll opt for assuming big endian regardless.
1480 switch (size)
1481 {
1482 case 1: ptr = ptr & 0xff; break;
1483 case 2: ptr = ptr & 0xffff; break;
1484 case 3: ptr = ptr & 0xffffff; break;
1485 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendaa99bcaa2010-11-29 21:38:58 +0000[diff] [blame]1486 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1487 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1488 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1489 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1490 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1491 default: break;
1492 }
1493 stack.back().GetScalar() = ptr;
1494 stack.back().ClearContext();
1495 }
1496 break;
1497 case Value::eValueTypeLoadAddress:
1498 if (exe_ctx)
1499 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1500 if (process)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1501 {
1502 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1503 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1504 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1505 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1506 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1507 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1508 uint32_t addr_data_offset = 0;
1509 switch (size)
1510 {
1511 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1512 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1513 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1514 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1515 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1516 }
1517 stack.back().ClearContext();
1518 }
1519 else
1520 {
1521 if (error_ptr)
1522 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1523 pointer_addr,
1524 error.AsCString());
1525 return false;
1526 }
1527 }
1528 else
1529 {
1530 if (error_ptr)
1531 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1532 return false;
1533 }
1534 }
1535 else
1536 {
1537 if (error_ptr)
1538 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1539 return false;
1540 }
1541 break;
1542
1543 default:
1544 break;
1545 }
1546
1547 }
1548 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1549
1550 //----------------------------------------------------------------------
1551 // OPCODE: DW_OP_xderef_size
1552 // OPERANDS: 1
1553 // 1 - uint8_t that specifies the size of the data to dereference.
1554 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1555 // the top of the stack is treated as an address. The second stack
Greg Clayton33ed1702010-08-24 00:45:41 +0000[diff] [blame]1556 // entry is treated as an "address space identifier" for those
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1557 // architectures that support multiple address spaces. The top two
1558 // stack elements are popped, a data item is retrieved through an
1559 // implementation-defined address calculation and pushed as the new
1560 // stack top. In the DW_OP_xderef_size operation, however, the size in
1561 // bytes of the data retrieved from the dereferenced address is
1562 // specified by the single operand. This operand is a 1-byte unsigned
1563 // integral constant whose value may not be larger than the size of an
1564 // address on the target machine. The data retrieved is zero extended
1565 // to the size of an address on the target machine before being pushed
1566 // on the expression stack.
1567 //----------------------------------------------------------------------
1568 case DW_OP_xderef_size:
1569 if (error_ptr)
1570 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1571 return false;
1572 //----------------------------------------------------------------------
1573 // OPCODE: DW_OP_xderef
1574 // OPERANDS: none
1575 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1576 // the top of the stack is treated as an address. The second stack entry
1577 // is treated as an "address space identifier" for those architectures
1578 // that support multiple address spaces. The top two stack elements are
1579 // popped, a data item is retrieved through an implementation-defined
1580 // address calculation and pushed as the new stack top. The size of the
1581 // data retrieved from the dereferenced address is the size of an address
1582 // on the target machine.
1583 //----------------------------------------------------------------------
1584 case DW_OP_xderef:
1585 if (error_ptr)
1586 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1587 return false;
1588
1589 //----------------------------------------------------------------------
1590 // All DW_OP_constXXX opcodes have a single operand as noted below:
1591 //
1592 // Opcode Operand 1
1593 // --------------- ----------------------------------------------------
1594 // DW_OP_const1u 1-byte unsigned integer constant
1595 // DW_OP_const1s 1-byte signed integer constant
1596 // DW_OP_const2u 2-byte unsigned integer constant
1597 // DW_OP_const2s 2-byte signed integer constant
1598 // DW_OP_const4u 4-byte unsigned integer constant
1599 // DW_OP_const4s 4-byte signed integer constant
1600 // DW_OP_const8u 8-byte unsigned integer constant
1601 // DW_OP_const8s 8-byte signed integer constant
1602 // DW_OP_constu unsigned LEB128 integer constant
1603 // DW_OP_consts signed LEB128 integer constant
1604 //----------------------------------------------------------------------
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1605 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1606 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1607 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1608 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1609 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1610 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1611 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1612 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1613 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1614 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1615
1616 //----------------------------------------------------------------------
1617 // OPCODE: DW_OP_dup
1618 // OPERANDS: none
1619 // DESCRIPTION: duplicates the value at the top of the stack
1620 //----------------------------------------------------------------------
1621 case DW_OP_dup:
1622 if (stack.empty())
1623 {
1624 if (error_ptr)
1625 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1626 return false;
1627 }
1628 else
1629 stack.push_back(stack.back());
1630 break;
1631
1632 //----------------------------------------------------------------------
1633 // OPCODE: DW_OP_drop
1634 // OPERANDS: none
1635 // DESCRIPTION: pops the value at the top of the stack
1636 //----------------------------------------------------------------------
1637 case DW_OP_drop:
1638 if (stack.empty())
1639 {
1640 if (error_ptr)
1641 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1642 return false;
1643 }
1644 else
1645 stack.pop_back();
1646 break;
1647
1648 //----------------------------------------------------------------------
1649 // OPCODE: DW_OP_over
1650 // OPERANDS: none
1651 // DESCRIPTION: Duplicates the entry currently second in the stack at
1652 // the top of the stack.
1653 //----------------------------------------------------------------------
1654 case DW_OP_over:
1655 if (stack.size() < 2)
1656 {
1657 if (error_ptr)
1658 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1659 return false;
1660 }
1661 else
1662 stack.push_back(stack[stack.size() - 2]);
1663 break;
1664
1665
1666 //----------------------------------------------------------------------
1667 // OPCODE: DW_OP_pick
1668 // OPERANDS: uint8_t index into the current stack
1669 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1670 // inclusive) is pushed on the stack
1671 //----------------------------------------------------------------------
1672 case DW_OP_pick:
1673 {
1674 uint8_t pick_idx = opcodes.GetU8(&offset);
1675 if (pick_idx < stack.size())
1676 stack.push_back(stack[pick_idx]);
1677 else
1678 {
1679 if (error_ptr)
1680 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1681 return false;
1682 }
1683 }
1684 break;
1685
1686 //----------------------------------------------------------------------
1687 // OPCODE: DW_OP_swap
1688 // OPERANDS: none
1689 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1690 // of the stack becomes the second stack entry, and the second entry
1691 // becomes the top of the stack
1692 //----------------------------------------------------------------------
1693 case DW_OP_swap:
1694 if (stack.size() < 2)
1695 {
1696 if (error_ptr)
1697 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1698 return false;
1699 }
1700 else
1701 {
1702 tmp = stack.back();
1703 stack.back() = stack[stack.size() - 2];
1704 stack[stack.size() - 2] = tmp;
1705 }
1706 break;
1707
1708 //----------------------------------------------------------------------
1709 // OPCODE: DW_OP_rot
1710 // OPERANDS: none
1711 // DESCRIPTION: Rotates the first three stack entries. The entry at
1712 // the top of the stack becomes the third stack entry, the second
1713 // entry becomes the top of the stack, and the third entry becomes
1714 // the second entry.
1715 //----------------------------------------------------------------------
1716 case DW_OP_rot:
1717 if (stack.size() < 3)
1718 {
1719 if (error_ptr)
1720 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1721 return false;
1722 }
1723 else
1724 {
1725 size_t last_idx = stack.size() - 1;
1726 Value old_top = stack[last_idx];
1727 stack[last_idx] = stack[last_idx - 1];
1728 stack[last_idx - 1] = stack[last_idx - 2];
1729 stack[last_idx - 2] = old_top;
1730 }
1731 break;
1732
1733 //----------------------------------------------------------------------
1734 // OPCODE: DW_OP_abs
1735 // OPERANDS: none
1736 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1737 // value and pushes its absolute value. If the absolute value can not be
1738 // represented, the result is undefined.
1739 //----------------------------------------------------------------------
1740 case DW_OP_abs:
1741 if (stack.empty())
1742 {
1743 if (error_ptr)
1744 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1745 return false;
1746 }
1747 else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
1748 {
1749 if (error_ptr)
1750 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1751 return false;
1752 }
1753 break;
1754
1755 //----------------------------------------------------------------------
1756 // OPCODE: DW_OP_and
1757 // OPERANDS: none
1758 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1759 // operation on the two, and pushes the result.
1760 //----------------------------------------------------------------------
1761 case DW_OP_and:
1762 if (stack.size() < 2)
1763 {
1764 if (error_ptr)
1765 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1766 return false;
1767 }
1768 else
1769 {
1770 tmp = stack.back();
1771 stack.pop_back();
1772 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
1773 }
1774 break;
1775
1776 //----------------------------------------------------------------------
1777 // OPCODE: DW_OP_div
1778 // OPERANDS: none
1779 // DESCRIPTION: pops the top two stack values, divides the former second
1780 // entry by the former top of the stack using signed division, and
1781 // pushes the result.
1782 //----------------------------------------------------------------------
1783 case DW_OP_div:
1784 if (stack.size() < 2)
1785 {
1786 if (error_ptr)
1787 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1788 return false;
1789 }
1790 else
1791 {
1792 tmp = stack.back();
1793 if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
1794 {
1795 if (error_ptr)
1796 error_ptr->SetErrorString("Divide by zero.");
1797 return false;
1798 }
1799 else
1800 {
1801 stack.pop_back();
1802 stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
1803 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1804 {
1805 if (error_ptr)
1806 error_ptr->SetErrorString("Divide failed.");
1807 return false;
1808 }
1809 }
1810 }
1811 break;
1812
1813 //----------------------------------------------------------------------
1814 // OPCODE: DW_OP_minus
1815 // OPERANDS: none
1816 // DESCRIPTION: pops the top two stack values, subtracts the former top
1817 // of the stack from the former second entry, and pushes the result.
1818 //----------------------------------------------------------------------
1819 case DW_OP_minus:
1820 if (stack.size() < 2)
1821 {
1822 if (error_ptr)
1823 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1824 return false;
1825 }
1826 else
1827 {
1828 tmp = stack.back();
1829 stack.pop_back();
1830 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
1831 }
1832 break;
1833
1834 //----------------------------------------------------------------------
1835 // OPCODE: DW_OP_mod
1836 // OPERANDS: none
1837 // DESCRIPTION: pops the top two stack values and pushes the result of
1838 // the calculation: former second stack entry modulo the former top of
1839 // the stack.
1840 //----------------------------------------------------------------------
1841 case DW_OP_mod:
1842 if (stack.size() < 2)
1843 {
1844 if (error_ptr)
1845 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1846 return false;
1847 }
1848 else
1849 {
1850 tmp = stack.back();
1851 stack.pop_back();
1852 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
1853 }
1854 break;
1855
1856
1857 //----------------------------------------------------------------------
1858 // OPCODE: DW_OP_mul
1859 // OPERANDS: none
1860 // DESCRIPTION: pops the top two stack entries, multiplies them
1861 // together, and pushes the result.
1862 //----------------------------------------------------------------------
1863 case DW_OP_mul:
1864 if (stack.size() < 2)
1865 {
1866 if (error_ptr)
1867 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1868 return false;
1869 }
1870 else
1871 {
1872 tmp = stack.back();
1873 stack.pop_back();
1874 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
1875 }
1876 break;
1877
1878 //----------------------------------------------------------------------
1879 // OPCODE: DW_OP_neg
1880 // OPERANDS: none
1881 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1882 //----------------------------------------------------------------------
1883 case DW_OP_neg:
1884 if (stack.empty())
1885 {
1886 if (error_ptr)
1887 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1888 return false;
1889 }
1890 else
1891 {
1892 if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
1893 {
1894 if (error_ptr)
1895 error_ptr->SetErrorString("Unary negate failed.");
1896 return false;
1897 }
1898 }
1899 break;
1900
1901 //----------------------------------------------------------------------
1902 // OPCODE: DW_OP_not
1903 // OPERANDS: none
1904 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1905 // complement
1906 //----------------------------------------------------------------------
1907 case DW_OP_not:
1908 if (stack.empty())
1909 {
1910 if (error_ptr)
1911 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1912 return false;
1913 }
1914 else
1915 {
1916 if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
1917 {
1918 if (error_ptr)
1919 error_ptr->SetErrorString("Logical NOT failed.");
1920 return false;
1921 }
1922 }
1923 break;
1924
1925 //----------------------------------------------------------------------
1926 // OPCODE: DW_OP_or
1927 // OPERANDS: none
1928 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1929 // operation on the two, and pushes the result.
1930 //----------------------------------------------------------------------
1931 case DW_OP_or:
1932 if (stack.size() < 2)
1933 {
1934 if (error_ptr)
1935 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1936 return false;
1937 }
1938 else
1939 {
1940 tmp = stack.back();
1941 stack.pop_back();
1942 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
1943 }
1944 break;
1945
1946 //----------------------------------------------------------------------
1947 // OPCODE: DW_OP_plus
1948 // OPERANDS: none
1949 // DESCRIPTION: pops the top two stack entries, adds them together, and
1950 // pushes the result.
1951 //----------------------------------------------------------------------
1952 case DW_OP_plus:
1953 if (stack.size() < 2)
1954 {
1955 if (error_ptr)
1956 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1957 return false;
1958 }
1959 else
1960 {
1961 tmp = stack.back();
1962 stack.pop_back();
1963 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
1964 }
1965 break;
1966
1967 //----------------------------------------------------------------------
1968 // OPCODE: DW_OP_plus_uconst
1969 // OPERANDS: none
1970 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1971 // constant operand and pushes the result.
1972 //----------------------------------------------------------------------
1973 case DW_OP_plus_uconst:
1974 if (stack.empty())
1975 {
1976 if (error_ptr)
1977 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
1978 return false;
1979 }
1980 else
1981 {
1982 uint32_t uconst_value = opcodes.GetULEB128(&offset);
1983 // Implicit conversion from a UINT to a Scalar...
1984 stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
1985 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1986 {
1987 if (error_ptr)
1988 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
1989 return false;
1990 }
1991 }
1992 break;
1993
1994 //----------------------------------------------------------------------
1995 // OPCODE: DW_OP_shl
1996 // OPERANDS: none
1997 // DESCRIPTION: pops the top two stack entries, shifts the former
1998 // second entry left by the number of bits specified by the former top
1999 // of the stack, and pushes the result.
2000 //----------------------------------------------------------------------
2001 case DW_OP_shl:
2002 if (stack.size() < 2)
2003 {
2004 if (error_ptr)
2005 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
2006 return false;
2007 }
2008 else
2009 {
2010 tmp = stack.back();
2011 stack.pop_back();
2012 stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
2013 }
2014 break;
2015
2016 //----------------------------------------------------------------------
2017 // OPCODE: DW_OP_shr
2018 // OPERANDS: none
2019 // DESCRIPTION: pops the top two stack entries, shifts the former second
2020 // entry right logically (filling with zero bits) by the number of bits
2021 // specified by the former top of the stack, and pushes the result.
2022 //----------------------------------------------------------------------
2023 case DW_OP_shr:
2024 if (stack.size() < 2)
2025 {
2026 if (error_ptr)
2027 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2028 return false;
2029 }
2030 else
2031 {
2032 tmp = stack.back();
2033 stack.pop_back();
2034 if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
2035 {
2036 if (error_ptr)
2037 error_ptr->SetErrorString("DW_OP_shr failed.");
2038 return false;
2039 }
2040 }
2041 break;
2042
2043 //----------------------------------------------------------------------
2044 // OPCODE: DW_OP_shra
2045 // OPERANDS: none
2046 // DESCRIPTION: pops the top two stack entries, shifts the former second
2047 // entry right arithmetically (divide the magnitude by 2, keep the same
2048 // sign for the result) by the number of bits specified by the former
2049 // top of the stack, and pushes the result.
2050 //----------------------------------------------------------------------
2051 case DW_OP_shra:
2052 if (stack.size() < 2)
2053 {
2054 if (error_ptr)
2055 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2056 return false;
2057 }
2058 else
2059 {
2060 tmp = stack.back();
2061 stack.pop_back();
2062 stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
2063 }
2064 break;
2065
2066 //----------------------------------------------------------------------
2067 // OPCODE: DW_OP_xor
2068 // OPERANDS: none
2069 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2070 // exclusive-or operation on the two, and pushes the result.
2071 //----------------------------------------------------------------------
2072 case DW_OP_xor:
2073 if (stack.size() < 2)
2074 {
2075 if (error_ptr)
2076 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2077 return false;
2078 }
2079 else
2080 {
2081 tmp = stack.back();
2082 stack.pop_back();
2083 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
2084 }
2085 break;
2086
2087
2088 //----------------------------------------------------------------------
2089 // OPCODE: DW_OP_skip
2090 // OPERANDS: int16_t
2091 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2092 // signed integer constant. The 2-byte constant is the number of bytes
2093 // of the DWARF expression to skip forward or backward from the current
2094 // operation, beginning after the 2-byte constant.
2095 //----------------------------------------------------------------------
2096 case DW_OP_skip:
2097 {
2098 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
2099 uint32_t new_offset = offset + skip_offset;
2100 if (new_offset >= opcodes_offset && new_offset < end_offset)
2101 offset = new_offset;
2102 else
2103 {
2104 if (error_ptr)
2105 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2106 return false;
2107 }
2108 }
2109 break;
2110
2111 //----------------------------------------------------------------------
2112 // OPCODE: DW_OP_bra
2113 // OPERANDS: int16_t
2114 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2115 // signed integer constant. This operation pops the top of stack. If
2116 // the value popped is not the constant 0, the 2-byte constant operand
2117 // is the number of bytes of the DWARF expression to skip forward or
2118 // backward from the current operation, beginning after the 2-byte
2119 // constant.
2120 //----------------------------------------------------------------------
2121 case DW_OP_bra:
2122 {
2123 tmp = stack.back();
2124 stack.pop_back();
2125 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2126 Scalar zero(0);
2127 if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
2128 {
2129 uint32_t new_offset = offset + bra_offset;
2130 if (new_offset >= opcodes_offset && new_offset < end_offset)
2131 offset = new_offset;
2132 else
2133 {
2134 if (error_ptr)
2135 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
2136 return false;
2137 }
2138 }
2139 }
2140 break;
2141
2142 //----------------------------------------------------------------------
2143 // OPCODE: DW_OP_eq
2144 // OPERANDS: none
2145 // DESCRIPTION: pops the top two stack values, compares using the
2146 // equals (==) operator.
2147 // STACK RESULT: push the constant value 1 onto the stack if the result
2148 // of the operation is true or the constant value 0 if the result of the
2149 // operation is false.
2150 //----------------------------------------------------------------------
2151 case DW_OP_eq:
2152 if (stack.size() < 2)
2153 {
2154 if (error_ptr)
2155 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2156 return false;
2157 }
2158 else
2159 {
2160 tmp = stack.back();
2161 stack.pop_back();
2162 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
2163 }
2164 break;
2165
2166 //----------------------------------------------------------------------
2167 // OPCODE: DW_OP_ge
2168 // OPERANDS: none
2169 // DESCRIPTION: pops the top two stack values, compares using the
2170 // greater than or equal to (>=) operator.
2171 // STACK RESULT: push the constant value 1 onto the stack if the result
2172 // of the operation is true or the constant value 0 if the result of the
2173 // operation is false.
2174 //----------------------------------------------------------------------
2175 case DW_OP_ge:
2176 if (stack.size() < 2)
2177 {
2178 if (error_ptr)
2179 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2180 return false;
2181 }
2182 else
2183 {
2184 tmp = stack.back();
2185 stack.pop_back();
2186 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
2187 }
2188 break;
2189
2190 //----------------------------------------------------------------------
2191 // OPCODE: DW_OP_gt
2192 // OPERANDS: none
2193 // DESCRIPTION: pops the top two stack values, compares using the
2194 // greater than (>) operator.
2195 // STACK RESULT: push the constant value 1 onto the stack if the result
2196 // of the operation is true or the constant value 0 if the result of the
2197 // operation is false.
2198 //----------------------------------------------------------------------
2199 case DW_OP_gt:
2200 if (stack.size() < 2)
2201 {
2202 if (error_ptr)
2203 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2204 return false;
2205 }
2206 else
2207 {
2208 tmp = stack.back();
2209 stack.pop_back();
2210 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
2211 }
2212 break;
2213
2214 //----------------------------------------------------------------------
2215 // OPCODE: DW_OP_le
2216 // OPERANDS: none
2217 // DESCRIPTION: pops the top two stack values, compares using the
2218 // less than or equal to (<=) operator.
2219 // STACK RESULT: push the constant value 1 onto the stack if the result
2220 // of the operation is true or the constant value 0 if the result of the
2221 // operation is false.
2222 //----------------------------------------------------------------------
2223 case DW_OP_le:
2224 if (stack.size() < 2)
2225 {
2226 if (error_ptr)
2227 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2228 return false;
2229 }
2230 else
2231 {
2232 tmp = stack.back();
2233 stack.pop_back();
2234 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
2235 }
2236 break;
2237
2238 //----------------------------------------------------------------------
2239 // OPCODE: DW_OP_lt
2240 // OPERANDS: none
2241 // DESCRIPTION: pops the top two stack values, compares using the
2242 // less than (<) operator.
2243 // STACK RESULT: push the constant value 1 onto the stack if the result
2244 // of the operation is true or the constant value 0 if the result of the
2245 // operation is false.
2246 //----------------------------------------------------------------------
2247 case DW_OP_lt:
2248 if (stack.size() < 2)
2249 {
2250 if (error_ptr)
2251 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2252 return false;
2253 }
2254 else
2255 {
2256 tmp = stack.back();
2257 stack.pop_back();
2258 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
2259 }
2260 break;
2261
2262 //----------------------------------------------------------------------
2263 // OPCODE: DW_OP_ne
2264 // OPERANDS: none
2265 // DESCRIPTION: pops the top two stack values, compares using the
2266 // not equal (!=) operator.
2267 // STACK RESULT: push the constant value 1 onto the stack if the result
2268 // of the operation is true or the constant value 0 if the result of the
2269 // operation is false.
2270 //----------------------------------------------------------------------
2271 case DW_OP_ne:
2272 if (stack.size() < 2)
2273 {
2274 if (error_ptr)
2275 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2276 return false;
2277 }
2278 else
2279 {
2280 tmp = stack.back();
2281 stack.pop_back();
2282 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
2283 }
2284 break;
2285
2286 //----------------------------------------------------------------------
2287 // OPCODE: DW_OP_litn
2288 // OPERANDS: none
2289 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2290 // STACK RESULT: push the unsigned literal constant value onto the top
2291 // of the stack.
2292 //----------------------------------------------------------------------
2293 case DW_OP_lit0:
2294 case DW_OP_lit1:
2295 case DW_OP_lit2:
2296 case DW_OP_lit3:
2297 case DW_OP_lit4:
2298 case DW_OP_lit5:
2299 case DW_OP_lit6:
2300 case DW_OP_lit7:
2301 case DW_OP_lit8:
2302 case DW_OP_lit9:
2303 case DW_OP_lit10:
2304 case DW_OP_lit11:
2305 case DW_OP_lit12:
2306 case DW_OP_lit13:
2307 case DW_OP_lit14:
2308 case DW_OP_lit15:
2309 case DW_OP_lit16:
2310 case DW_OP_lit17:
2311 case DW_OP_lit18:
2312 case DW_OP_lit19:
2313 case DW_OP_lit20:
2314 case DW_OP_lit21:
2315 case DW_OP_lit22:
2316 case DW_OP_lit23:
2317 case DW_OP_lit24:
2318 case DW_OP_lit25:
2319 case DW_OP_lit26:
2320 case DW_OP_lit27:
2321 case DW_OP_lit28:
2322 case DW_OP_lit29:
2323 case DW_OP_lit30:
2324 case DW_OP_lit31:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2325 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2326 break;
2327
2328 //----------------------------------------------------------------------
2329 // OPCODE: DW_OP_regN
2330 // OPERANDS: none
2331 // DESCRIPTION: Push the value in register n on the top of the stack.
2332 //----------------------------------------------------------------------
2333 case DW_OP_reg0:
2334 case DW_OP_reg1:
2335 case DW_OP_reg2:
2336 case DW_OP_reg3:
2337 case DW_OP_reg4:
2338 case DW_OP_reg5:
2339 case DW_OP_reg6:
2340 case DW_OP_reg7:
2341 case DW_OP_reg8:
2342 case DW_OP_reg9:
2343 case DW_OP_reg10:
2344 case DW_OP_reg11:
2345 case DW_OP_reg12:
2346 case DW_OP_reg13:
2347 case DW_OP_reg14:
2348 case DW_OP_reg15:
2349 case DW_OP_reg16:
2350 case DW_OP_reg17:
2351 case DW_OP_reg18:
2352 case DW_OP_reg19:
2353 case DW_OP_reg20:
2354 case DW_OP_reg21:
2355 case DW_OP_reg22:
2356 case DW_OP_reg23:
2357 case DW_OP_reg24:
2358 case DW_OP_reg25:
2359 case DW_OP_reg26:
2360 case DW_OP_reg27:
2361 case DW_OP_reg28:
2362 case DW_OP_reg29:
2363 case DW_OP_reg30:
2364 case DW_OP_reg31:
2365 {
2366 reg_num = op - DW_OP_reg0;
2367
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2368 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2369 stack.push_back(tmp);
2370 else
2371 return false;
2372 }
2373 break;
2374 //----------------------------------------------------------------------
2375 // OPCODE: DW_OP_regx
2376 // OPERANDS:
2377 // ULEB128 literal operand that encodes the register.
2378 // DESCRIPTION: Push the value in register on the top of the stack.
2379 //----------------------------------------------------------------------
2380 case DW_OP_regx:
2381 {
2382 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2383 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2384 stack.push_back(tmp);
2385 else
2386 return false;
2387 }
2388 break;
2389
2390 //----------------------------------------------------------------------
2391 // OPCODE: DW_OP_bregN
2392 // OPERANDS:
2393 // SLEB128 offset from register N
2394 // DESCRIPTION: Value is in memory at the address specified by register
2395 // N plus an offset.
2396 //----------------------------------------------------------------------
2397 case DW_OP_breg0:
2398 case DW_OP_breg1:
2399 case DW_OP_breg2:
2400 case DW_OP_breg3:
2401 case DW_OP_breg4:
2402 case DW_OP_breg5:
2403 case DW_OP_breg6:
2404 case DW_OP_breg7:
2405 case DW_OP_breg8:
2406 case DW_OP_breg9:
2407 case DW_OP_breg10:
2408 case DW_OP_breg11:
2409 case DW_OP_breg12:
2410 case DW_OP_breg13:
2411 case DW_OP_breg14:
2412 case DW_OP_breg15:
2413 case DW_OP_breg16:
2414 case DW_OP_breg17:
2415 case DW_OP_breg18:
2416 case DW_OP_breg19:
2417 case DW_OP_breg20:
2418 case DW_OP_breg21:
2419 case DW_OP_breg22:
2420 case DW_OP_breg23:
2421 case DW_OP_breg24:
2422 case DW_OP_breg25:
2423 case DW_OP_breg26:
2424 case DW_OP_breg27:
2425 case DW_OP_breg28:
2426 case DW_OP_breg29:
2427 case DW_OP_breg30:
2428 case DW_OP_breg31:
2429 {
2430 reg_num = op - DW_OP_breg0;
2431
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2432 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2433 {
2434 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2435 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2436 stack.push_back(tmp);
2437 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2438 }
2439 else
2440 return false;
2441 }
2442 break;
2443 //----------------------------------------------------------------------
2444 // OPCODE: DW_OP_bregx
2445 // OPERANDS: 2
2446 // ULEB128 literal operand that encodes the register.
2447 // SLEB128 offset from register N
2448 // DESCRIPTION: Value is in memory at the address specified by register
2449 // N plus an offset.
2450 //----------------------------------------------------------------------
2451 case DW_OP_bregx:
2452 {
2453 reg_num = opcodes.GetULEB128(&offset);
2454
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2455 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2456 {
2457 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2458 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2459 stack.push_back(tmp);
2460 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2461 }
2462 else
2463 return false;
2464 }
2465 break;
2466
2467 case DW_OP_fbreg:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2468 if (exe_ctx)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2469 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2470 if (frame)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2471 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2472 Scalar value;
2473 if (frame->GetFrameBaseValue(value, error_ptr))
2474 {
2475 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2476 value += fbreg_offset;
2477 stack.push_back(value);
2478 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2479 }
2480 else
2481 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2482 }
2483 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2484 {
2485 if (error_ptr)
2486 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2487 return false;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2488 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2489 }
2490 else
2491 {
2492 if (error_ptr)
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2493 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2494 return false;
2495 }
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2496
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2497 break;
2498
2499 //----------------------------------------------------------------------
2500 // OPCODE: DW_OP_nop
2501 // OPERANDS: none
2502 // DESCRIPTION: A place holder. It has no effect on the location stack
2503 // or any of its values.
2504 //----------------------------------------------------------------------
2505 case DW_OP_nop:
2506 break;
2507
2508 //----------------------------------------------------------------------
2509 // OPCODE: DW_OP_piece
2510 // OPERANDS: 1
2511 // ULEB128: byte size of the piece
2512 // DESCRIPTION: The operand describes the size in bytes of the piece of
2513 // the object referenced by the DWARF expression whose result is at the
2514 // top of the stack. If the piece is located in a register, but does not
2515 // occupy the entire register, the placement of the piece within that
2516 // register is defined by the ABI.
2517 //
2518 // Many compilers store a single variable in sets of registers, or store
2519 // a variable partially in memory and partially in registers.
2520 // DW_OP_piece provides a way of describing how large a part of a
2521 // variable a particular DWARF expression refers to.
2522 //----------------------------------------------------------------------
2523 case DW_OP_piece:
2524 if (error_ptr)
2525 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2526 return false;
2527
2528 //----------------------------------------------------------------------
2529 // OPCODE: DW_OP_push_object_address
2530 // OPERANDS: none
2531 // DESCRIPTION: Pushes the address of the object currently being
2532 // evaluated as part of evaluation of a user presented expression.
2533 // This object may correspond to an independent variable described by
2534 // its own DIE or it may be a component of an array, structure, or class
2535 // whose address has been dynamically determined by an earlier step
2536 // during user expression evaluation.
2537 //----------------------------------------------------------------------
2538 case DW_OP_push_object_address:
2539 if (error_ptr)
2540 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2541 return false;
2542
2543 //----------------------------------------------------------------------
2544 // OPCODE: DW_OP_call2
2545 // OPERANDS:
2546 // uint16_t compile unit relative offset of a DIE
2547 // DESCRIPTION: Performs subroutine calls during evaluation
2548 // of a DWARF expression. The operand is the 2-byte unsigned offset
2549 // of a debugging information entry in the current compilation unit.
2550 //
2551 // Operand interpretation is exactly like that for DW_FORM_ref2.
2552 //
2553 // This operation transfers control of DWARF expression evaluation
2554 // to the DW_AT_location attribute of the referenced DIE. If there is
2555 // no such attribute, then there is no effect. Execution of the DWARF
2556 // expression of a DW_AT_location attribute may add to and/or remove from
2557 // values on the stack. Execution returns to the point following the call
2558 // when the end of the attribute is reached. Values on the stack at the
2559 // time of the call may be used as parameters by the called expression
2560 // and values left on the stack by the called expression may be used as
2561 // return values by prior agreement between the calling and called
2562 // expressions.
2563 //----------------------------------------------------------------------
2564 case DW_OP_call2:
2565 if (error_ptr)
2566 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2567 return false;
2568 //----------------------------------------------------------------------
2569 // OPCODE: DW_OP_call4
2570 // OPERANDS: 1
2571 // uint32_t compile unit relative offset of a DIE
2572 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2573 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2574 // of a debugging information entry in the current compilation unit.
2575 //
2576 // Operand interpretation DW_OP_call4 is exactly like that for
2577 // DW_FORM_ref4.
2578 //
2579 // This operation transfers control of DWARF expression evaluation
2580 // to the DW_AT_location attribute of the referenced DIE. If there is
2581 // no such attribute, then there is no effect. Execution of the DWARF
2582 // expression of a DW_AT_location attribute may add to and/or remove from
2583 // values on the stack. Execution returns to the point following the call
2584 // when the end of the attribute is reached. Values on the stack at the
2585 // time of the call may be used as parameters by the called expression
2586 // and values left on the stack by the called expression may be used as
2587 // return values by prior agreement between the calling and called
2588 // expressions.
2589 //----------------------------------------------------------------------
2590 case DW_OP_call4:
2591 if (error_ptr)
2592 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2593 return false;
2594
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2595#if 0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2596 //----------------------------------------------------------------------
2597 // OPCODE: DW_OP_call_ref
2598 // OPERANDS:
2599 // uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
2600 // absolute DIE offset for 64 bit DWARF.
2601 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2602 // expression. Takes a single operand. In the 32-bit DWARF format, the
2603 // operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
2604 // is an 8-byte unsigned value. The operand is used as the offset of a
2605 // debugging information entry in a .debug_info section which may be
2606 // contained in a shared object for executable other than that
2607 // containing the operator. For references from one shared object or
2608 // executable to another, the relocation must be performed by the
2609 // consumer.
2610 //
2611 // Operand interpretation of DW_OP_call_ref is exactly like that for
2612 // DW_FORM_ref_addr.
2613 //
2614 // This operation transfers control of DWARF expression evaluation
2615 // to the DW_AT_location attribute of the referenced DIE. If there is
2616 // no such attribute, then there is no effect. Execution of the DWARF
2617 // expression of a DW_AT_location attribute may add to and/or remove from
2618 // values on the stack. Execution returns to the point following the call
2619 // when the end of the attribute is reached. Values on the stack at the
2620 // time of the call may be used as parameters by the called expression
2621 // and values left on the stack by the called expression may be used as
2622 // return values by prior agreement between the calling and called
2623 // expressions.
2624 //----------------------------------------------------------------------
2625 case DW_OP_call_ref:
2626 if (error_ptr)
2627 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
2628 return false;
2629
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2630 //----------------------------------------------------------------------
2631 // OPCODE: DW_OP_APPLE_array_ref
2632 // OPERANDS: none
2633 // DESCRIPTION: Pops a value off the stack and uses it as the array
2634 // index. Pops a second value off the stack and uses it as the array
2635 // itself. Pushes a value onto the stack representing the element of
2636 // the array specified by the index.
2637 //----------------------------------------------------------------------
2638 case DW_OP_APPLE_array_ref:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2639 {
2640 if (stack.size() < 2)
2641 {
2642 if (error_ptr)
2643 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
2644 return false;
2645 }
2646
2647 Value index_val = stack.back();
2648 stack.pop_back();
2649 Value array_val = stack.back();
2650 stack.pop_back();
2651
2652 Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2653 int64_t index = index_scalar.SLongLong(LLONG_MAX);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2654
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2655 if (index == LLONG_MAX)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2656 {
2657 if (error_ptr)
2658 error_ptr->SetErrorString("Invalid array index.");
2659 return false;
2660 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2661
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2662 if (array_val.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2663 {
2664 if (error_ptr)
2665 error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
2666 return false;
2667 }
2668
2669 if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
2670 array_val.GetValueType() != Value::eValueTypeHostAddress)
2671 {
2672 if (error_ptr)
2673 error_ptr->SetErrorString("Array must be stored in memory.");
2674 return false;
2675 }
2676
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2677 void *array_type = array_val.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2678
2679 void *member_type;
2680 uint64_t size = 0;
2681
2682 if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
2683 (!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
2684 {
2685 if (error_ptr)
2686 error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
2687 return false;
2688 }
2689
2690 if (size && (index >= size || index < 0))
2691 {
2692 if (error_ptr)
2693 error_ptr->SetErrorStringWithFormat("Out of bounds array access. %lld is not in [0, %llu]", index, size);
2694 return false;
2695 }
2696
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2697 uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
2698 uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2699 uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
2700 if (member_bit_incr % 8)
2701 {
2702 if (error_ptr)
Jason Molenda95b7b432011-09-20 00:26:08 +0000[diff] [blame]2703 error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2704 return false;
2705 }
2706 int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
2707
2708 Value member;
2709
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2710 member.SetContext(Value::eContextTypeClangType, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2711 member.SetValueType(array_val.GetValueType());
2712
2713 addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
2714 addr_t member_loc = array_base + member_offset;
2715 member.GetScalar() = (uint64_t)member_loc;
2716
2717 stack.push_back(member);
2718 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2719 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2720
2721 //----------------------------------------------------------------------
2722 // OPCODE: DW_OP_APPLE_uninit
2723 // OPERANDS: none
2724 // DESCRIPTION: Lets us know that the value is currently not initialized
2725 //----------------------------------------------------------------------
2726 case DW_OP_APPLE_uninit:
2727 //return eResultTypeErrorUninitialized;
2728 break; // Ignore this as we have seen cases where this value is incorrectly added
2729
2730 //----------------------------------------------------------------------
2731 // OPCODE: DW_OP_APPLE_assign
2732 // OPERANDS: none
2733 // DESCRIPTION: Pops a value off of the stack and assigns it to the next
2734 // item on the stack which must be something assignable (inferior
2735 // Variable, inferior Type with address, inferior register, or
2736 // expression local variable.
2737 //----------------------------------------------------------------------
2738 case DW_OP_APPLE_assign:
2739 if (stack.size() < 2)
2740 {
2741 if (error_ptr)
2742 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
2743 return false;
2744 }
2745 else
2746 {
2747 tmp = stack.back();
2748 stack.pop_back();
2749 Value::ContextType context_type = stack.back().GetContextType();
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]2750 StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2751 switch (context_type)
2752 {
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2753 case Value::eContextTypeClangType:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2754 {
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2755 void *clang_type = stack.back().GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2756
2757 if (ClangASTContext::IsAggregateType (clang_type))
2758 {
2759 Value::ValueType source_value_type = tmp.GetValueType();
2760 Value::ValueType target_value_type = stack.back().GetValueType();
2761
2762 addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
2763 addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
2764
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2765 size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2766
2767 switch (source_value_type)
2768 {
Greg Clayton4fdf7602011-03-20 04:57:14 +0000[diff] [blame]2769 case Value::eValueTypeScalar:
2770 case Value::eValueTypeFileAddress:
2771 break;
2772
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2773 case Value::eValueTypeLoadAddress:
2774 switch (target_value_type)
2775 {
2776 case Value::eValueTypeLoadAddress:
2777 {
2778 DataBufferHeap data;
2779 data.SetByteSize(byte_size);
2780
2781 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2782 if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2783 {
2784 if (error_ptr)
2785 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2786 return false;
2787 }
2788
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2789 if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2790 {
2791 if (error_ptr)
2792 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2793 return false;
2794 }
2795 }
2796 break;
2797 case Value::eValueTypeHostAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2798 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2799 {
2800 if (error_ptr)
2801 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2802 return false;
2803 }
2804 else
2805 {
2806 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2807 if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2808 {
2809 if (error_ptr)
2810 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2811 return false;
2812 }
2813 }
2814 break;
2815 default:
2816 return false;
2817 }
2818 break;
2819 case Value::eValueTypeHostAddress:
2820 switch (target_value_type)
2821 {
2822 case Value::eValueTypeLoadAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2823 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2824 {
2825 if (error_ptr)
2826 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2827 return false;
2828 }
2829 else
2830 {
2831 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2832 if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2833 {
2834 if (error_ptr)
2835 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2836 return false;
2837 }
2838 }
2839 case Value::eValueTypeHostAddress:
2840 memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
2841 break;
2842 default:
2843 return false;
2844 }
2845 }
2846 }
2847 else
2848 {
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2849 if (!ClangASTType::SetValueFromScalar (ast_context,
2850 clang_type,
2851 tmp.ResolveValue(exe_ctx, ast_context),
2852 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2853 {
2854 if (error_ptr)
2855 error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
2856 return false;
2857 }
2858
2859 Value::ValueType value_type = stack.back().GetValueType();
2860
2861 switch (value_type)
2862 {
2863 case Value::eValueTypeLoadAddress:
2864 case Value::eValueTypeHostAddress:
2865 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]2866 AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2867 lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2868 if (!ClangASTType::WriteToMemory (ast_context,
2869 clang_type,
2870 exe_ctx,
2871 addr,
2872 address_type,
2873 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2874 {
2875 if (error_ptr)
2876 error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%llx.\n", addr);
2877 return false;
2878 }
2879 }
2880 break;
2881
2882 default:
2883 break;
2884 }
2885 }
2886 }
2887 break;
2888
2889 default:
2890 if (error_ptr)
2891 error_ptr->SetErrorString ("Assign failed.");
2892 return false;
2893 }
2894 }
2895 break;
2896
2897 //----------------------------------------------------------------------
2898 // OPCODE: DW_OP_APPLE_address_of
2899 // OPERANDS: none
2900 // DESCRIPTION: Pops a value off of the stack and pushed its address.
2901 // The top item on the stack must be a variable, or already be a memory
2902 // location.
2903 //----------------------------------------------------------------------
2904 case DW_OP_APPLE_address_of:
2905 if (stack.empty())
2906 {
2907 if (error_ptr)
2908 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
2909 return false;
2910 }
2911 else
2912 {
2913 Value::ValueType value_type = stack.back().GetValueType();
2914 switch (value_type)
2915 {
2916 default:
2917 case Value::eValueTypeScalar: // raw scalar value
2918 if (error_ptr)
2919 error_ptr->SetErrorString("Top stack item isn't a memory based object.");
2920 return false;
2921
2922 case Value::eValueTypeLoadAddress: // load address value
2923 case Value::eValueTypeFileAddress: // file address value
2924 case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
2925 // Taking the address of an object reduces it to the address
2926 // of the value and removes any extra context it had.
2927 //stack.back().SetValueType(Value::eValueTypeScalar);
2928 stack.back().ClearContext();
2929 break;
2930 }
2931 }
2932 break;
2933
2934 //----------------------------------------------------------------------
2935 // OPCODE: DW_OP_APPLE_value_of
2936 // OPERANDS: none
2937 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2938 // The top item on the stack must be a variable, expression variable.
2939 //----------------------------------------------------------------------
2940 case DW_OP_APPLE_value_of:
2941 if (stack.empty())
2942 {
2943 if (error_ptr)
2944 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
2945 return false;
2946 }
2947 else if (!stack.back().ValueOf(exe_ctx, ast_context))
2948 {
2949 if (error_ptr)
2950 error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
2951 return false;
2952 }
2953 break;
2954
2955 //----------------------------------------------------------------------
2956 // OPCODE: DW_OP_APPLE_deref_type
2957 // OPERANDS: none
2958 // DESCRIPTION: gets the value pointed to by the top stack item
2959 //----------------------------------------------------------------------
2960 case DW_OP_APPLE_deref_type:
2961 {
2962 if (stack.empty())
2963 {
2964 if (error_ptr)
2965 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
2966 return false;
2967 }
2968
2969 tmp = stack.back();
2970 stack.pop_back();
2971
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2972 if (tmp.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2973 {
2974 if (error_ptr)
2975 error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
2976 return false;
2977 }
2978
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2979 void *ptr_type = tmp.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2980 void *target_type;
2981
2982 if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
2983 {
2984 if (error_ptr)
2985 error_ptr->SetErrorString("Dereferencing a non-pointer type");
2986 return false;
2987 }
2988
2989 // TODO do we want all pointers to be dereferenced as load addresses?
2990 Value::ValueType value_type = tmp.GetValueType();
2991
2992 tmp.ResolveValue(exe_ctx, ast_context);
2993
2994 tmp.SetValueType(value_type);
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2995 tmp.SetContext(Value::eContextTypeClangType, target_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2996
2997 stack.push_back(tmp);
2998 }
2999 break;
3000
3001 //----------------------------------------------------------------------
3002 // OPCODE: DW_OP_APPLE_expr_local
3003 // OPERANDS: ULEB128
3004 // DESCRIPTION: pushes the expression local variable index onto the
3005 // stack and set the appropriate context so we know the stack item is
3006 // an expression local variable index.
3007 //----------------------------------------------------------------------
3008 case DW_OP_APPLE_expr_local:
3009 {
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3010 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3011 uint32_t idx = opcodes.GetULEB128(&offset);
3012 if (expr_locals == NULL)
3013 {
3014 if (error_ptr)
3015 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
3016 return false;
3017 }
3018 Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
3019 if (expr_local_variable == NULL)
3020 {
3021 if (error_ptr)
3022 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
3023 return false;
3024 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3025 // The proxy code has been removed. If it is ever re-added, please
3026 // use shared pointers or return by value to avoid possible memory
3027 // leak (there is no leak here, but in general, no returning pointers
3028 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3029 Value *proxy = expr_local_variable->CreateProxy();
3030 stack.push_back(*proxy);
3031 delete proxy;
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3032 //stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3033 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3034 }
3035 break;
3036
3037 //----------------------------------------------------------------------
3038 // OPCODE: DW_OP_APPLE_extern
3039 // OPERANDS: ULEB128
3040 // DESCRIPTION: pushes a proxy for the extern object index onto the
3041 // stack.
3042 //----------------------------------------------------------------------
3043 case DW_OP_APPLE_extern:
3044 {
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3045 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3046 uint32_t idx = opcodes.GetULEB128(&offset);
3047 if (!decl_map)
3048 {
3049 if (error_ptr)
3050 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
3051 return false;
3052 }
3053 Value *extern_var = decl_map->GetValueForIndex(idx);
3054 if (!extern_var)
3055 {
3056 if (error_ptr)
3057 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
3058 return false;
3059 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3060 // The proxy code has been removed. If it is ever re-added, please
3061 // use shared pointers or return by value to avoid possible memory
3062 // leak (there is no leak here, but in general, no returning pointers
3063 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3064 Value *proxy = extern_var->CreateProxy();
3065 stack.push_back(*proxy);
3066 delete proxy;
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3067 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3068 }
3069 break;
3070
3071 case DW_OP_APPLE_scalar_cast:
3072 if (stack.empty())
3073 {
3074 if (error_ptr)
3075 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
3076 return false;
3077 }
3078 else
3079 {
3080 // Simple scalar cast
3081 if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
3082 {
3083 if (error_ptr)
3084 error_ptr->SetErrorString("Cast failed.");
3085 return false;
3086 }
3087 }
3088 break;
3089
3090
3091 case DW_OP_APPLE_clang_cast:
3092 if (stack.empty())
3093 {
3094 if (error_ptr)
3095 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
3096 return false;
3097 }
3098 else
3099 {
3100 void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3101 stack.back().SetContext (Value::eContextTypeClangType, clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3102 }
3103 break;
3104 //----------------------------------------------------------------------
3105 // OPCODE: DW_OP_APPLE_constf
3106 // OPERANDS: 1 byte float length, followed by that many bytes containing
3107 // the constant float data.
3108 // DESCRIPTION: Push a float value onto the expression stack.
3109 //----------------------------------------------------------------------
3110 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
3111 {
3112 uint8_t float_length = opcodes.GetU8(&offset);
3113 if (sizeof(float) == float_length)
3114 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
3115 else if (sizeof(double) == float_length)
3116 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
3117 else if (sizeof(long double) == float_length)
3118 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
3119 else
3120 {
3121 StreamString new_value;
3122 opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
3123
3124 if (error_ptr)
3125 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
3126 return false;
3127 }
3128 tmp.SetValueType(Value::eValueTypeScalar);
3129 tmp.ClearContext();
3130 stack.push_back(tmp);
3131 }
3132 break;
3133 //----------------------------------------------------------------------
3134 // OPCODE: DW_OP_APPLE_clear
3135 // OPERANDS: none
3136 // DESCRIPTION: Clears the expression stack.
3137 //----------------------------------------------------------------------
3138 case DW_OP_APPLE_clear:
3139 stack.clear();
3140 break;
3141
3142 //----------------------------------------------------------------------
3143 // OPCODE: DW_OP_APPLE_error
3144 // OPERANDS: none
3145 // DESCRIPTION: Pops a value off of the stack and pushed its value.
3146 // The top item on the stack must be a variable, expression variable.
3147 //----------------------------------------------------------------------
3148 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
3149 if (error_ptr)
3150 error_ptr->SetErrorString ("Generic error.");
3151 return false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]3152#endif // #if 0
3153
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3154 }
3155 }
3156
3157 if (stack.empty())
3158 {
3159 if (error_ptr)
3160 error_ptr->SetErrorString ("Stack empty after evaluation.");
3161 return false;
3162 }
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]3163 else if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3164 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3165 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]3166 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3167 for (size_t i=0; i<count; ++i)
3168 {
3169 StreamString new_value;
3170 new_value.Printf("[%zu]", i);
3171 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]3172 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3173 }
3174 }
3175
3176 result = stack.back();
3177 return true; // Return true on success
3178}
3179