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gerrit-public.fairphone.software / toolchain / llvm-project / bdae3787ef23070b59532e02da2ee08365015ef4 / . / lldb / source / Expression / DWARFExpression.cpp
blob: b0b634e8cefa4ad296ca5f248fd23b45108054a8 [file] [log] [blame]
Chris Lattner30fdc8d2010-06-08 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
Virgile Bellobdae3782013-08-28 12:14:27 +0000[diff] [blame^]12// C Includes
13#include <inttypes.h>
14
15// C++ Includes
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]16#include <vector>
17
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]18#include "lldb/Core/DataEncoder.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]19#include "lldb/Core/dwarf.h"
20#include "lldb/Core/Log.h"
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]21#include "lldb/Core/RegisterValue.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]22#include "lldb/Core/StreamString.h"
23#include "lldb/Core/Scalar.h"
24#include "lldb/Core/Value.h"
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]25#include "lldb/Core/VMRange.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]26
27#include "lldb/Expression/ClangExpressionDeclMap.h"
28#include "lldb/Expression/ClangExpressionVariable.h"
29
Greg Clayton7fb56d02011-02-01 01:31:41 +0000[diff] [blame]30#include "lldb/Host/Endian.h"
Jim Inghamf220d592011-12-01 03:01:30 +0000[diff] [blame]31#include "lldb/Host/Host.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]32
33#include "lldb/lldb-private-log.h"
34
Greg Claytone1a916a2010-07-21 22:12:05 +0000[diff] [blame]35#include "lldb/Symbol/ClangASTType.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]36#include "lldb/Symbol/ClangASTContext.h"
37#include "lldb/Symbol/Type.h"
38
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]39#include "lldb/Target/ABI.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]40#include "lldb/Target/ExecutionContext.h"
41#include "lldb/Target/Process.h"
42#include "lldb/Target/RegisterContext.h"
43#include "lldb/Target/StackFrame.h"
Ashok Thirumurthi6e264d32013-07-29 16:05:11 +0000[diff] [blame]44#include "lldb/Target/StackID.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]45
46using namespace lldb;
47using namespace lldb_private;
48
49const char *
50DW_OP_value_to_name (uint32_t val)
51{
52 static char invalid[100];
53 switch (val) {
54 case 0x03: return "DW_OP_addr";
55 case 0x06: return "DW_OP_deref";
56 case 0x08: return "DW_OP_const1u";
57 case 0x09: return "DW_OP_const1s";
58 case 0x0a: return "DW_OP_const2u";
59 case 0x0b: return "DW_OP_const2s";
60 case 0x0c: return "DW_OP_const4u";
61 case 0x0d: return "DW_OP_const4s";
62 case 0x0e: return "DW_OP_const8u";
63 case 0x0f: return "DW_OP_const8s";
64 case 0x10: return "DW_OP_constu";
65 case 0x11: return "DW_OP_consts";
66 case 0x12: return "DW_OP_dup";
67 case 0x13: return "DW_OP_drop";
68 case 0x14: return "DW_OP_over";
69 case 0x15: return "DW_OP_pick";
70 case 0x16: return "DW_OP_swap";
71 case 0x17: return "DW_OP_rot";
72 case 0x18: return "DW_OP_xderef";
73 case 0x19: return "DW_OP_abs";
74 case 0x1a: return "DW_OP_and";
75 case 0x1b: return "DW_OP_div";
76 case 0x1c: return "DW_OP_minus";
77 case 0x1d: return "DW_OP_mod";
78 case 0x1e: return "DW_OP_mul";
79 case 0x1f: return "DW_OP_neg";
80 case 0x20: return "DW_OP_not";
81 case 0x21: return "DW_OP_or";
82 case 0x22: return "DW_OP_plus";
83 case 0x23: return "DW_OP_plus_uconst";
84 case 0x24: return "DW_OP_shl";
85 case 0x25: return "DW_OP_shr";
86 case 0x26: return "DW_OP_shra";
87 case 0x27: return "DW_OP_xor";
88 case 0x2f: return "DW_OP_skip";
89 case 0x28: return "DW_OP_bra";
90 case 0x29: return "DW_OP_eq";
91 case 0x2a: return "DW_OP_ge";
92 case 0x2b: return "DW_OP_gt";
93 case 0x2c: return "DW_OP_le";
94 case 0x2d: return "DW_OP_lt";
95 case 0x2e: return "DW_OP_ne";
96 case 0x30: return "DW_OP_lit0";
97 case 0x31: return "DW_OP_lit1";
98 case 0x32: return "DW_OP_lit2";
99 case 0x33: return "DW_OP_lit3";
100 case 0x34: return "DW_OP_lit4";
101 case 0x35: return "DW_OP_lit5";
102 case 0x36: return "DW_OP_lit6";
103 case 0x37: return "DW_OP_lit7";
104 case 0x38: return "DW_OP_lit8";
105 case 0x39: return "DW_OP_lit9";
106 case 0x3a: return "DW_OP_lit10";
107 case 0x3b: return "DW_OP_lit11";
108 case 0x3c: return "DW_OP_lit12";
109 case 0x3d: return "DW_OP_lit13";
110 case 0x3e: return "DW_OP_lit14";
111 case 0x3f: return "DW_OP_lit15";
112 case 0x40: return "DW_OP_lit16";
113 case 0x41: return "DW_OP_lit17";
114 case 0x42: return "DW_OP_lit18";
115 case 0x43: return "DW_OP_lit19";
116 case 0x44: return "DW_OP_lit20";
117 case 0x45: return "DW_OP_lit21";
118 case 0x46: return "DW_OP_lit22";
119 case 0x47: return "DW_OP_lit23";
120 case 0x48: return "DW_OP_lit24";
121 case 0x49: return "DW_OP_lit25";
122 case 0x4a: return "DW_OP_lit26";
123 case 0x4b: return "DW_OP_lit27";
124 case 0x4c: return "DW_OP_lit28";
125 case 0x4d: return "DW_OP_lit29";
126 case 0x4e: return "DW_OP_lit30";
127 case 0x4f: return "DW_OP_lit31";
128 case 0x50: return "DW_OP_reg0";
129 case 0x51: return "DW_OP_reg1";
130 case 0x52: return "DW_OP_reg2";
131 case 0x53: return "DW_OP_reg3";
132 case 0x54: return "DW_OP_reg4";
133 case 0x55: return "DW_OP_reg5";
134 case 0x56: return "DW_OP_reg6";
135 case 0x57: return "DW_OP_reg7";
136 case 0x58: return "DW_OP_reg8";
137 case 0x59: return "DW_OP_reg9";
138 case 0x5a: return "DW_OP_reg10";
139 case 0x5b: return "DW_OP_reg11";
140 case 0x5c: return "DW_OP_reg12";
141 case 0x5d: return "DW_OP_reg13";
142 case 0x5e: return "DW_OP_reg14";
143 case 0x5f: return "DW_OP_reg15";
144 case 0x60: return "DW_OP_reg16";
145 case 0x61: return "DW_OP_reg17";
146 case 0x62: return "DW_OP_reg18";
147 case 0x63: return "DW_OP_reg19";
148 case 0x64: return "DW_OP_reg20";
149 case 0x65: return "DW_OP_reg21";
150 case 0x66: return "DW_OP_reg22";
151 case 0x67: return "DW_OP_reg23";
152 case 0x68: return "DW_OP_reg24";
153 case 0x69: return "DW_OP_reg25";
154 case 0x6a: return "DW_OP_reg26";
155 case 0x6b: return "DW_OP_reg27";
156 case 0x6c: return "DW_OP_reg28";
157 case 0x6d: return "DW_OP_reg29";
158 case 0x6e: return "DW_OP_reg30";
159 case 0x6f: return "DW_OP_reg31";
160 case 0x70: return "DW_OP_breg0";
161 case 0x71: return "DW_OP_breg1";
162 case 0x72: return "DW_OP_breg2";
163 case 0x73: return "DW_OP_breg3";
164 case 0x74: return "DW_OP_breg4";
165 case 0x75: return "DW_OP_breg5";
166 case 0x76: return "DW_OP_breg6";
167 case 0x77: return "DW_OP_breg7";
168 case 0x78: return "DW_OP_breg8";
169 case 0x79: return "DW_OP_breg9";
170 case 0x7a: return "DW_OP_breg10";
171 case 0x7b: return "DW_OP_breg11";
172 case 0x7c: return "DW_OP_breg12";
173 case 0x7d: return "DW_OP_breg13";
174 case 0x7e: return "DW_OP_breg14";
175 case 0x7f: return "DW_OP_breg15";
176 case 0x80: return "DW_OP_breg16";
177 case 0x81: return "DW_OP_breg17";
178 case 0x82: return "DW_OP_breg18";
179 case 0x83: return "DW_OP_breg19";
180 case 0x84: return "DW_OP_breg20";
181 case 0x85: return "DW_OP_breg21";
182 case 0x86: return "DW_OP_breg22";
183 case 0x87: return "DW_OP_breg23";
184 case 0x88: return "DW_OP_breg24";
185 case 0x89: return "DW_OP_breg25";
186 case 0x8a: return "DW_OP_breg26";
187 case 0x8b: return "DW_OP_breg27";
188 case 0x8c: return "DW_OP_breg28";
189 case 0x8d: return "DW_OP_breg29";
190 case 0x8e: return "DW_OP_breg30";
191 case 0x8f: return "DW_OP_breg31";
192 case 0x90: return "DW_OP_regx";
193 case 0x91: return "DW_OP_fbreg";
194 case 0x92: return "DW_OP_bregx";
195 case 0x93: return "DW_OP_piece";
196 case 0x94: return "DW_OP_deref_size";
197 case 0x95: return "DW_OP_xderef_size";
198 case 0x96: return "DW_OP_nop";
199 case 0x97: return "DW_OP_push_object_address";
200 case 0x98: return "DW_OP_call2";
201 case 0x99: return "DW_OP_call4";
202 case 0x9a: return "DW_OP_call_ref";
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]203// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
204// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]205 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]206// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
207// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
208// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
209// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
210// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
211// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
212// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
213// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
214// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
215// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]216 default:
217 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
218 return invalid;
219 }
220}
221
222
223//----------------------------------------------------------------------
224// DWARFExpression constructor
225//----------------------------------------------------------------------
226DWARFExpression::DWARFExpression() :
227 m_data(),
228 m_reg_kind (eRegisterKindDWARF),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]229 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]230{
231}
232
233DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
234 m_data(rhs.m_data),
235 m_reg_kind (rhs.m_reg_kind),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]236 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]237{
238}
239
240
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]241DWARFExpression::DWARFExpression(const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length) :
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]242 m_data(data, data_offset, data_length),
243 m_reg_kind (eRegisterKindDWARF),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]244 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]245{
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]246}
247
248//----------------------------------------------------------------------
249// Destructor
250//----------------------------------------------------------------------
251DWARFExpression::~DWARFExpression()
252{
253}
254
255
256bool
257DWARFExpression::IsValid() const
258{
259 return m_data.GetByteSize() > 0;
260}
261
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]262void
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]263DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]264{
265 m_data = data;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]266}
267
268void
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]269DWARFExpression::CopyOpcodeData (const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Greg Clayton8179bca2012-08-10 23:33:27 +0000[diff] [blame]270{
271 const uint8_t *bytes = data.PeekData(data_offset, data_length);
Greg Clayton7f4c7432012-08-11 00:49:14 +0000[diff] [blame]272 if (bytes)
273 {
274 m_data.SetData(DataBufferSP(new DataBufferHeap(bytes, data_length)));
275 m_data.SetByteOrder(data.GetByteOrder());
276 m_data.SetAddressByteSize(data.GetAddressByteSize());
277 }
Greg Clayton8179bca2012-08-10 23:33:27 +0000[diff] [blame]278}
279
280void
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]281DWARFExpression::SetOpcodeData (const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]282{
283 m_data.SetData(data, data_offset, data_length);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]284}
285
286void
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]287DWARFExpression::DumpLocation (Stream *s, lldb::offset_t offset, lldb::offset_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]288{
289 if (!m_data.ValidOffsetForDataOfSize(offset, length))
290 return;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]291 const lldb::offset_t start_offset = offset;
292 const lldb::offset_t end_offset = offset + length;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]293 while (m_data.ValidOffset(offset) && offset < end_offset)
294 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]295 const lldb::offset_t op_offset = offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]296 const uint8_t op = m_data.GetU8(&offset);
297
298 switch (level)
299 {
Greg Claytonc982c762010-07-09 20:39:50 +0000[diff] [blame]300 default:
301 break;
302
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]303 case lldb::eDescriptionLevelBrief:
304 if (offset > start_offset)
305 s->PutChar(' ');
306 break;
307
308 case lldb::eDescriptionLevelFull:
309 case lldb::eDescriptionLevelVerbose:
310 if (offset > start_offset)
311 s->EOL();
312 s->Indent();
313 if (level == lldb::eDescriptionLevelFull)
314 break;
315 // Fall through for verbose and print offset and DW_OP prefix..
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]316 s->Printf("0x%8.8" PRIx64 ": %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]317 break;
318 }
319
320 switch (op)
321 {
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]322 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
323 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
324 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
325 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
326 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
327 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
328 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
329 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]330 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
331 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
332 case DW_OP_constu: s->Printf("DW_OP_constu(0x%" PRIx64 ") ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
333 case DW_OP_consts: s->Printf("DW_OP_consts(0x%" PRId64 ") ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]334 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
335 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
336 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
337 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
338 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
339 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
340 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
341 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
342 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
343 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
344 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
345 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
346 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
347 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
348 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
349 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
350 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]351 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]352 s->Printf("DW_OP_plus_uconst(0x%" PRIx64 ") ", m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]353 break;
354
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]355 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
356 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
357 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
358 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
359 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
360 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
361 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
362 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
363 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
364 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
365 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
366 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]367
368 case DW_OP_lit0: // 0x30
369 case DW_OP_lit1: // 0x31
370 case DW_OP_lit2: // 0x32
371 case DW_OP_lit3: // 0x33
372 case DW_OP_lit4: // 0x34
373 case DW_OP_lit5: // 0x35
374 case DW_OP_lit6: // 0x36
375 case DW_OP_lit7: // 0x37
376 case DW_OP_lit8: // 0x38
377 case DW_OP_lit9: // 0x39
378 case DW_OP_lit10: // 0x3A
379 case DW_OP_lit11: // 0x3B
380 case DW_OP_lit12: // 0x3C
381 case DW_OP_lit13: // 0x3D
382 case DW_OP_lit14: // 0x3E
383 case DW_OP_lit15: // 0x3F
384 case DW_OP_lit16: // 0x40
385 case DW_OP_lit17: // 0x41
386 case DW_OP_lit18: // 0x42
387 case DW_OP_lit19: // 0x43
388 case DW_OP_lit20: // 0x44
389 case DW_OP_lit21: // 0x45
390 case DW_OP_lit22: // 0x46
391 case DW_OP_lit23: // 0x47
392 case DW_OP_lit24: // 0x48
393 case DW_OP_lit25: // 0x49
394 case DW_OP_lit26: // 0x4A
395 case DW_OP_lit27: // 0x4B
396 case DW_OP_lit28: // 0x4C
397 case DW_OP_lit29: // 0x4D
398 case DW_OP_lit30: // 0x4E
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]399 case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]400
401 case DW_OP_reg0: // 0x50
402 case DW_OP_reg1: // 0x51
403 case DW_OP_reg2: // 0x52
404 case DW_OP_reg3: // 0x53
405 case DW_OP_reg4: // 0x54
406 case DW_OP_reg5: // 0x55
407 case DW_OP_reg6: // 0x56
408 case DW_OP_reg7: // 0x57
409 case DW_OP_reg8: // 0x58
410 case DW_OP_reg9: // 0x59
411 case DW_OP_reg10: // 0x5A
412 case DW_OP_reg11: // 0x5B
413 case DW_OP_reg12: // 0x5C
414 case DW_OP_reg13: // 0x5D
415 case DW_OP_reg14: // 0x5E
416 case DW_OP_reg15: // 0x5F
417 case DW_OP_reg16: // 0x60
418 case DW_OP_reg17: // 0x61
419 case DW_OP_reg18: // 0x62
420 case DW_OP_reg19: // 0x63
421 case DW_OP_reg20: // 0x64
422 case DW_OP_reg21: // 0x65
423 case DW_OP_reg22: // 0x66
424 case DW_OP_reg23: // 0x67
425 case DW_OP_reg24: // 0x68
426 case DW_OP_reg25: // 0x69
427 case DW_OP_reg26: // 0x6A
428 case DW_OP_reg27: // 0x6B
429 case DW_OP_reg28: // 0x6C
430 case DW_OP_reg29: // 0x6D
431 case DW_OP_reg30: // 0x6E
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]432 case DW_OP_reg31: // 0x6F
433 {
434 uint32_t reg_num = op - DW_OP_reg0;
435 if (abi)
436 {
437 RegisterInfo reg_info;
438 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
439 {
440 if (reg_info.name)
441 {
442 s->PutCString (reg_info.name);
443 break;
444 }
445 else if (reg_info.alt_name)
446 {
447 s->PutCString (reg_info.alt_name);
448 break;
449 }
450 }
451 }
452 s->Printf("DW_OP_reg%u", reg_num); break;
453 }
454 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]455
456 case DW_OP_breg0:
457 case DW_OP_breg1:
458 case DW_OP_breg2:
459 case DW_OP_breg3:
460 case DW_OP_breg4:
461 case DW_OP_breg5:
462 case DW_OP_breg6:
463 case DW_OP_breg7:
464 case DW_OP_breg8:
465 case DW_OP_breg9:
466 case DW_OP_breg10:
467 case DW_OP_breg11:
468 case DW_OP_breg12:
469 case DW_OP_breg13:
470 case DW_OP_breg14:
471 case DW_OP_breg15:
472 case DW_OP_breg16:
473 case DW_OP_breg17:
474 case DW_OP_breg18:
475 case DW_OP_breg19:
476 case DW_OP_breg20:
477 case DW_OP_breg21:
478 case DW_OP_breg22:
479 case DW_OP_breg23:
480 case DW_OP_breg24:
481 case DW_OP_breg25:
482 case DW_OP_breg26:
483 case DW_OP_breg27:
484 case DW_OP_breg28:
485 case DW_OP_breg29:
486 case DW_OP_breg30:
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]487 case DW_OP_breg31:
488 {
489 uint32_t reg_num = op - DW_OP_breg0;
490 int64_t reg_offset = m_data.GetSLEB128(&offset);
491 if (abi)
492 {
493 RegisterInfo reg_info;
494 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
495 {
496 if (reg_info.name)
497 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]498 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]499 break;
500 }
501 else if (reg_info.alt_name)
502 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]503 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]504 break;
505 }
506 }
507 }
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]508 s->Printf("DW_OP_breg%i(0x%" PRIx64 ")", reg_num, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]509 }
510 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]511
512 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]513 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]514 uint32_t reg_num = m_data.GetULEB128(&offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]515 if (abi)
516 {
517 RegisterInfo reg_info;
518 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
519 {
520 if (reg_info.name)
521 {
522 s->PutCString (reg_info.name);
523 break;
524 }
525 else if (reg_info.alt_name)
526 {
527 s->PutCString (reg_info.alt_name);
528 break;
529 }
530 }
531 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]532 s->Printf("DW_OP_regx(%" PRIu32 ")", reg_num); break;
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]533 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]534 break;
535 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]536 s->Printf("DW_OP_fbreg(%" PRIi64 ")",m_data.GetSLEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]537 break;
538 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]539 {
540 uint32_t reg_num = m_data.GetULEB128(&offset);
541 int64_t reg_offset = m_data.GetSLEB128(&offset);
542 if (abi)
543 {
544 RegisterInfo reg_info;
545 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
546 {
547 if (reg_info.name)
548 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]549 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]550 break;
551 }
552 else if (reg_info.alt_name)
553 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]554 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]555 break;
556 }
557 }
558 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]559 s->Printf("DW_OP_bregx(reg=%" PRIu32 ",offset=%" PRIi64 ")", reg_num, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]560 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]561 break;
562 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]563 s->Printf("DW_OP_piece(0x%" PRIx64 ")", m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]564 break;
565 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]566 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]567 break;
568 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]569 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]570 break;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]571 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
572 case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]573 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]574 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]575 break;
576 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]577 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]578 break;
579 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]580 s->Printf("DW_OP_call_ref(0x%8.8" PRIx64 ")", m_data.GetAddress(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]581 break;
582// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
583// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
584// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]585// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]586// break;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]587// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
588// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]589// case DW_OP_APPLE_extern:
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]590// s->Printf("DW_OP_APPLE_extern(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]591// break;
592// case DW_OP_APPLE_array_ref:
593// s->PutCString("DW_OP_APPLE_array_ref");
594// break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]595 case DW_OP_APPLE_uninit:
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]596 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]597 break;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]598// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
599// s->PutCString("DW_OP_APPLE_assign");
600// break;
601// 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)
602// s->PutCString("DW_OP_APPLE_address_of");
603// break;
604// 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)
605// s->PutCString("DW_OP_APPLE_value_of");
606// break;
607// 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)
608// s->PutCString("DW_OP_APPLE_deref_type");
609// break;
610// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]611// s->Printf("DW_OP_APPLE_expr_local(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]612// break;
613// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
614// {
615// uint8_t float_length = m_data.GetU8(&offset);
616// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
617// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
618// s->PutChar(')');
619// // Consume the float data
620// m_data.GetData(&offset, float_length);
621// }
622// break;
623// case DW_OP_APPLE_scalar_cast:
624// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
625// break;
626// case DW_OP_APPLE_clang_cast:
627// {
628// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
629// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
630// }
631// break;
632// case DW_OP_APPLE_clear:
633// s->PutCString("DW_OP_APPLE_clear");
634// break;
635// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
636// s->PutCString("DW_OP_APPLE_error");
637// break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]638 }
639 }
640}
641
642void
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]643DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]644{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]645 m_loclist_slide = slide;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]646}
647
648int
649DWARFExpression::GetRegisterKind ()
650{
651 return m_reg_kind;
652}
653
654void
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]655DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]656{
657 m_reg_kind = reg_kind;
658}
659
660bool
661DWARFExpression::IsLocationList() const
662{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]663 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]664}
665
666void
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]667DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]668{
669 if (IsLocationList())
670 {
671 // We have a location list
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]672 lldb::offset_t offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]673 uint32_t count = 0;
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]674 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]675 while (m_data.ValidOffset(offset))
676 {
677 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
678 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
679 if (begin_addr_offset < end_addr_offset)
680 {
681 if (count > 0)
682 s->PutCString(", ");
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]683 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
684 addr_range.Dump(s, 0, 8);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]685 s->PutChar('{');
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]686 lldb::offset_t location_length = m_data.GetU16(&offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]687 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]688 s->PutChar('}');
689 offset += location_length;
690 }
691 else if (begin_addr_offset == 0 && end_addr_offset == 0)
692 {
693 // The end of the location list is marked by both the start and end offset being zero
694 break;
695 }
696 else
697 {
Greg Claytone0d378b2011-03-24 21:19:54 +0000[diff] [blame]698 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
699 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]700 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]701 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]702 // We have a new base address
703 if (count > 0)
704 s->PutCString(", ");
705 *s << "base_addr = " << end_addr_offset;
706 }
707 }
708
709 count++;
710 }
711 }
712 else
713 {
714 // We have a normal location that contains DW_OP location opcodes
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]715 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]716 }
717}
718
719static bool
720ReadRegisterValueAsScalar
721(
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]722 RegisterContext *reg_ctx,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]723 uint32_t reg_kind,
724 uint32_t reg_num,
725 Error *error_ptr,
726 Value &value
727)
728{
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]729 if (reg_ctx == NULL)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]730 {
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]731 if (error_ptr)
732 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]733 }
734 else
735 {
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]736 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]737 if (native_reg == LLDB_INVALID_REGNUM)
738 {
739 if (error_ptr)
740 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
741 }
742 else
743 {
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]744 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
745 RegisterValue reg_value;
746 if (reg_ctx->ReadRegister (reg_info, reg_value))
747 {
748 if (reg_value.GetScalarValue(value.GetScalar()))
749 {
750 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]751 value.SetContext (Value::eContextTypeRegisterInfo,
752 const_cast<RegisterInfo *>(reg_info));
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]753 if (error_ptr)
754 error_ptr->Clear();
755 return true;
756 }
757 else
758 {
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]759 // If we get this error, then we need to implement a value
760 // buffer in the dwarf expression evaluation function...
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]761 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]762 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
763 reg_info->name);
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]764 }
765 }
766 else
767 {
768 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]769 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]770 }
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]771 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]772 }
773 return false;
774}
775
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]776//bool
777//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
778//{
779// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
780//}
781//
782//bool
783//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
784//{
785// if (load_addr == LLDB_INVALID_ADDRESS)
786// return false;
787//
788// if (IsLocationList())
789// {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]790// lldb::offset_t offset = 0;
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]791//
792// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
793//
794// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
795// return false;
796//
797// while (m_data.ValidOffset(offset))
798// {
799// // We need to figure out what the value is for the location.
800// addr_t lo_pc = m_data.GetAddress(&offset);
801// addr_t hi_pc = m_data.GetAddress(&offset);
802// if (lo_pc == 0 && hi_pc == 0)
803// break;
804// else
805// {
806// lo_pc += loc_list_base_addr;
807// hi_pc += loc_list_base_addr;
808//
809// if (lo_pc <= load_addr && load_addr < hi_pc)
810// return true;
811//
812// offset += m_data.GetU16(&offset);
813// }
814// }
815// }
816// return false;
817//}
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]818
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]819static offset_t
820GetOpcodeDataSize (const DataExtractor &data, const lldb::offset_t data_offset, const uint8_t op)
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]821{
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]822 lldb::offset_t offset = data_offset;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]823 switch (op)
824 {
825 case DW_OP_addr:
826 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
827 return data.GetAddressByteSize();
828
829 // Opcodes with no arguments
830 case DW_OP_deref: // 0x06
831 case DW_OP_dup: // 0x12
832 case DW_OP_drop: // 0x13
833 case DW_OP_over: // 0x14
834 case DW_OP_swap: // 0x16
835 case DW_OP_rot: // 0x17
836 case DW_OP_xderef: // 0x18
837 case DW_OP_abs: // 0x19
838 case DW_OP_and: // 0x1a
839 case DW_OP_div: // 0x1b
840 case DW_OP_minus: // 0x1c
841 case DW_OP_mod: // 0x1d
842 case DW_OP_mul: // 0x1e
843 case DW_OP_neg: // 0x1f
844 case DW_OP_not: // 0x20
845 case DW_OP_or: // 0x21
846 case DW_OP_plus: // 0x22
847 case DW_OP_shl: // 0x24
848 case DW_OP_shr: // 0x25
849 case DW_OP_shra: // 0x26
850 case DW_OP_xor: // 0x27
851 case DW_OP_eq: // 0x29
852 case DW_OP_ge: // 0x2a
853 case DW_OP_gt: // 0x2b
854 case DW_OP_le: // 0x2c
855 case DW_OP_lt: // 0x2d
856 case DW_OP_ne: // 0x2e
857 case DW_OP_lit0: // 0x30
858 case DW_OP_lit1: // 0x31
859 case DW_OP_lit2: // 0x32
860 case DW_OP_lit3: // 0x33
861 case DW_OP_lit4: // 0x34
862 case DW_OP_lit5: // 0x35
863 case DW_OP_lit6: // 0x36
864 case DW_OP_lit7: // 0x37
865 case DW_OP_lit8: // 0x38
866 case DW_OP_lit9: // 0x39
867 case DW_OP_lit10: // 0x3A
868 case DW_OP_lit11: // 0x3B
869 case DW_OP_lit12: // 0x3C
870 case DW_OP_lit13: // 0x3D
871 case DW_OP_lit14: // 0x3E
872 case DW_OP_lit15: // 0x3F
873 case DW_OP_lit16: // 0x40
874 case DW_OP_lit17: // 0x41
875 case DW_OP_lit18: // 0x42
876 case DW_OP_lit19: // 0x43
877 case DW_OP_lit20: // 0x44
878 case DW_OP_lit21: // 0x45
879 case DW_OP_lit22: // 0x46
880 case DW_OP_lit23: // 0x47
881 case DW_OP_lit24: // 0x48
882 case DW_OP_lit25: // 0x49
883 case DW_OP_lit26: // 0x4A
884 case DW_OP_lit27: // 0x4B
885 case DW_OP_lit28: // 0x4C
886 case DW_OP_lit29: // 0x4D
887 case DW_OP_lit30: // 0x4E
888 case DW_OP_lit31: // 0x4f
889 case DW_OP_reg0: // 0x50
890 case DW_OP_reg1: // 0x51
891 case DW_OP_reg2: // 0x52
892 case DW_OP_reg3: // 0x53
893 case DW_OP_reg4: // 0x54
894 case DW_OP_reg5: // 0x55
895 case DW_OP_reg6: // 0x56
896 case DW_OP_reg7: // 0x57
897 case DW_OP_reg8: // 0x58
898 case DW_OP_reg9: // 0x59
899 case DW_OP_reg10: // 0x5A
900 case DW_OP_reg11: // 0x5B
901 case DW_OP_reg12: // 0x5C
902 case DW_OP_reg13: // 0x5D
903 case DW_OP_reg14: // 0x5E
904 case DW_OP_reg15: // 0x5F
905 case DW_OP_reg16: // 0x60
906 case DW_OP_reg17: // 0x61
907 case DW_OP_reg18: // 0x62
908 case DW_OP_reg19: // 0x63
909 case DW_OP_reg20: // 0x64
910 case DW_OP_reg21: // 0x65
911 case DW_OP_reg22: // 0x66
912 case DW_OP_reg23: // 0x67
913 case DW_OP_reg24: // 0x68
914 case DW_OP_reg25: // 0x69
915 case DW_OP_reg26: // 0x6A
916 case DW_OP_reg27: // 0x6B
917 case DW_OP_reg28: // 0x6C
918 case DW_OP_reg29: // 0x6D
919 case DW_OP_reg30: // 0x6E
920 case DW_OP_reg31: // 0x6F
921 case DW_OP_nop: // 0x96
922 case DW_OP_push_object_address: // 0x97 DWARF3
923 case DW_OP_form_tls_address: // 0x9b DWARF3
924 case DW_OP_call_frame_cfa: // 0x9c DWARF3
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]925 case DW_OP_stack_value: // 0x9f DWARF4
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]926 return 0;
927
928 // Opcodes with a single 1 byte arguments
929 case DW_OP_const1u: // 0x08 1 1-byte constant
930 case DW_OP_const1s: // 0x09 1 1-byte constant
931 case DW_OP_pick: // 0x15 1 1-byte stack index
932 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
933 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
934 return 1;
935
936 // Opcodes with a single 2 byte arguments
937 case DW_OP_const2u: // 0x0a 1 2-byte constant
938 case DW_OP_const2s: // 0x0b 1 2-byte constant
939 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
940 case DW_OP_bra: // 0x28 1 signed 2-byte constant
941 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
942 return 2;
943
944 // Opcodes with a single 4 byte arguments
945 case DW_OP_const4u: // 0x0c 1 4-byte constant
946 case DW_OP_const4s: // 0x0d 1 4-byte constant
947 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
948 return 4;
949
950 // Opcodes with a single 8 byte arguments
951 case DW_OP_const8u: // 0x0e 1 8-byte constant
952 case DW_OP_const8s: // 0x0f 1 8-byte constant
953 return 8;
954
955 // All opcodes that have a single ULEB (signed or unsigned) argument
956 case DW_OP_constu: // 0x10 1 ULEB128 constant
957 case DW_OP_consts: // 0x11 1 SLEB128 constant
958 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
959 case DW_OP_breg0: // 0x70 1 ULEB128 register
960 case DW_OP_breg1: // 0x71 1 ULEB128 register
961 case DW_OP_breg2: // 0x72 1 ULEB128 register
962 case DW_OP_breg3: // 0x73 1 ULEB128 register
963 case DW_OP_breg4: // 0x74 1 ULEB128 register
964 case DW_OP_breg5: // 0x75 1 ULEB128 register
965 case DW_OP_breg6: // 0x76 1 ULEB128 register
966 case DW_OP_breg7: // 0x77 1 ULEB128 register
967 case DW_OP_breg8: // 0x78 1 ULEB128 register
968 case DW_OP_breg9: // 0x79 1 ULEB128 register
969 case DW_OP_breg10: // 0x7a 1 ULEB128 register
970 case DW_OP_breg11: // 0x7b 1 ULEB128 register
971 case DW_OP_breg12: // 0x7c 1 ULEB128 register
972 case DW_OP_breg13: // 0x7d 1 ULEB128 register
973 case DW_OP_breg14: // 0x7e 1 ULEB128 register
974 case DW_OP_breg15: // 0x7f 1 ULEB128 register
975 case DW_OP_breg16: // 0x80 1 ULEB128 register
976 case DW_OP_breg17: // 0x81 1 ULEB128 register
977 case DW_OP_breg18: // 0x82 1 ULEB128 register
978 case DW_OP_breg19: // 0x83 1 ULEB128 register
979 case DW_OP_breg20: // 0x84 1 ULEB128 register
980 case DW_OP_breg21: // 0x85 1 ULEB128 register
981 case DW_OP_breg22: // 0x86 1 ULEB128 register
982 case DW_OP_breg23: // 0x87 1 ULEB128 register
983 case DW_OP_breg24: // 0x88 1 ULEB128 register
984 case DW_OP_breg25: // 0x89 1 ULEB128 register
985 case DW_OP_breg26: // 0x8a 1 ULEB128 register
986 case DW_OP_breg27: // 0x8b 1 ULEB128 register
987 case DW_OP_breg28: // 0x8c 1 ULEB128 register
988 case DW_OP_breg29: // 0x8d 1 ULEB128 register
989 case DW_OP_breg30: // 0x8e 1 ULEB128 register
990 case DW_OP_breg31: // 0x8f 1 ULEB128 register
991 case DW_OP_regx: // 0x90 1 ULEB128 register
992 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
993 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
994 data.Skip_LEB128(&offset);
995 return offset - data_offset;
996
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]997 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]998 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
999 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
1000 data.Skip_LEB128(&offset);
1001 data.Skip_LEB128(&offset);
1002 return offset - data_offset;
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]1003
1004 case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
1005 {
1006 uint64_t block_len = data.Skip_LEB128(&offset);
1007 offset += block_len;
1008 return offset - data_offset;
1009 }
1010
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1011 default:
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1012 break;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1013 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1014 return LLDB_INVALID_OFFSET;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1015}
1016
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1017lldb::addr_t
1018DWARFExpression::GetLocation_DW_OP_addr (uint32_t op_addr_idx, bool &error) const
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1019{
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1020 error = false;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1021 if (IsLocationList())
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1022 return LLDB_INVALID_ADDRESS;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1023 lldb::offset_t offset = 0;
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1024 uint32_t curr_op_addr_idx = 0;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1025 while (m_data.ValidOffset(offset))
1026 {
1027 const uint8_t op = m_data.GetU8(&offset);
1028
1029 if (op == DW_OP_addr)
1030 {
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1031 const lldb::addr_t op_file_addr = m_data.GetAddress(&offset);
1032 if (curr_op_addr_idx == op_addr_idx)
1033 return op_file_addr;
1034 else
1035 ++curr_op_addr_idx;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1036 }
1037 else
1038 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1039 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1040 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1041 {
1042 error = true;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1043 break;
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1044 }
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1045 offset += op_arg_size;
1046 }
1047 }
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1048 return LLDB_INVALID_ADDRESS;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1049}
1050
1051bool
1052DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1053{
1054 if (IsLocationList())
1055 return false;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1056 lldb::offset_t offset = 0;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1057 while (m_data.ValidOffset(offset))
1058 {
1059 const uint8_t op = m_data.GetU8(&offset);
1060
1061 if (op == DW_OP_addr)
1062 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1063 const uint32_t addr_byte_size = m_data.GetAddressByteSize();
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1064 // We have to make a copy of the data as we don't know if this
1065 // data is from a read only memory mapped buffer, so we duplicate
1066 // all of the data first, then modify it, and if all goes well,
1067 // we then replace the data for this expression
1068
1069 // So first we copy the data into a heap buffer
Greg Clayton7b0992d2013-04-18 22:45:39 +0000[diff] [blame]1070 std::unique_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
Greg Claytone01e07b2013-04-18 18:10:51 +0000[diff] [blame]1071 m_data.GetByteSize()));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1072
1073 // Make en encoder so we can write the address into the buffer using
1074 // the correct byte order (endianness)
1075 DataEncoder encoder (head_data_ap->GetBytes(),
1076 head_data_ap->GetByteSize(),
1077 m_data.GetByteOrder(),
1078 addr_byte_size);
1079
1080 // Replace the address in the new buffer
1081 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1082 return false;
1083
1084 // All went well, so now we can reset the data using a shared
1085 // pointer to the heap data so "m_data" will now correctly
1086 // manage the heap data.
1087 m_data.SetData (DataBufferSP (head_data_ap.release()));
1088 return true;
1089 }
1090 else
1091 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1092 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1093 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1094 break;
1095 offset += op_arg_size;
1096 }
1097 }
1098 return false;
1099}
1100
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1101bool
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1102DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1103{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1104 if (addr == LLDB_INVALID_ADDRESS)
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1105 return false;
1106
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1107 if (IsLocationList())
1108 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1109 lldb::offset_t offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1110
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1111 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1112 return false;
1113
1114 while (m_data.ValidOffset(offset))
1115 {
1116 // We need to figure out what the value is for the location.
1117 addr_t lo_pc = m_data.GetAddress(&offset);
1118 addr_t hi_pc = m_data.GetAddress(&offset);
1119 if (lo_pc == 0 && hi_pc == 0)
1120 break;
1121 else
1122 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1123 lo_pc += loclist_base_addr - m_loclist_slide;
1124 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1125
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1126 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1127 return true;
1128
1129 offset += m_data.GetU16(&offset);
1130 }
1131 }
1132 }
1133 return false;
1134}
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1135
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1136bool
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1137DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, lldb::offset_t &offset, lldb::offset_t &length)
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1138{
1139 offset = 0;
1140 if (!IsLocationList())
1141 {
1142 length = m_data.GetByteSize();
1143 return true;
1144 }
1145
1146 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1147 {
1148 addr_t curr_base_addr = base_addr;
1149
1150 while (m_data.ValidOffset(offset))
1151 {
1152 // We need to figure out what the value is for the location.
1153 addr_t lo_pc = m_data.GetAddress(&offset);
1154 addr_t hi_pc = m_data.GetAddress(&offset);
1155 if (lo_pc == 0 && hi_pc == 0)
1156 {
1157 break;
1158 }
1159 else
1160 {
1161 lo_pc += curr_base_addr - m_loclist_slide;
1162 hi_pc += curr_base_addr - m_loclist_slide;
1163
1164 length = m_data.GetU16(&offset);
1165
1166 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1167 return true;
1168
1169 offset += length;
1170 }
1171 }
1172 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1173 offset = LLDB_INVALID_OFFSET;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1174 length = 0;
1175 return false;
1176}
1177
1178bool
1179DWARFExpression::DumpLocationForAddress (Stream *s,
1180 lldb::DescriptionLevel level,
1181 addr_t base_addr,
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]1182 addr_t address,
1183 ABI *abi)
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1184{
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1185 lldb::offset_t offset = 0;
1186 lldb::offset_t length = 0;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1187
1188 if (GetLocation (base_addr, address, offset, length))
1189 {
1190 if (length > 0)
1191 {
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]1192 DumpLocation(s, offset, length, level, abi);
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1193 return true;
1194 }
1195 }
1196 return false;
1197}
1198
1199bool
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1200DWARFExpression::Evaluate
1201(
1202 ExecutionContextScope *exe_scope,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1203 ClangExpressionVariableList *expr_locals,
1204 ClangExpressionDeclMap *decl_map,
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1205 lldb::addr_t loclist_base_load_addr,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1206 const Value* initial_value_ptr,
1207 Value& result,
1208 Error *error_ptr
1209) const
1210{
1211 ExecutionContext exe_ctx (exe_scope);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1212 return Evaluate(&exe_ctx, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1213}
1214
1215bool
1216DWARFExpression::Evaluate
1217(
1218 ExecutionContext *exe_ctx,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1219 ClangExpressionVariableList *expr_locals,
1220 ClangExpressionDeclMap *decl_map,
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1221 RegisterContext *reg_ctx,
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1222 lldb::addr_t loclist_base_load_addr,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1223 const Value* initial_value_ptr,
1224 Value& result,
1225 Error *error_ptr
1226) const
1227{
1228 if (IsLocationList())
1229 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1230 lldb::offset_t offset = 0;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1231 addr_t pc;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1232 StackFrame *frame = NULL;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1233 if (reg_ctx)
1234 pc = reg_ctx->GetPC();
1235 else
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1236 {
1237 frame = exe_ctx->GetFramePtr();
Sean Callananb7de9602012-03-10 03:03:46 +0000[diff] [blame]1238 if (!frame)
1239 return false;
1240 RegisterContextSP reg_ctx_sp = frame->GetRegisterContext();
1241 if (!reg_ctx_sp)
1242 return false;
1243 pc = reg_ctx_sp->GetPC();
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1244 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1245
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1246 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1247 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1248 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1249 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1250 if (error_ptr)
1251 error_ptr->SetErrorString("Invalid PC in frame.");
1252 return false;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1253 }
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1254
1255 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1256
1257 while (m_data.ValidOffset(offset))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1258 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1259 // We need to figure out what the value is for the location.
1260 addr_t lo_pc = m_data.GetAddress(&offset);
1261 addr_t hi_pc = m_data.GetAddress(&offset);
1262 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1263 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1264 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1265 }
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1266 else
1267 {
1268 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1269 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1270
1271 uint16_t length = m_data.GetU16(&offset);
1272
1273 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1274 {
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1275 return DWARFExpression::Evaluate (exe_ctx, expr_locals, decl_map, reg_ctx, m_data, offset, length, m_reg_kind, initial_value_ptr, result, error_ptr);
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1276 }
1277 offset += length;
1278 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1279 }
1280 }
1281 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]1282 error_ptr->SetErrorString ("variable not available");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1283 return false;
1284 }
1285
1286 // Not a location list, just a single expression.
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1287 return DWARFExpression::Evaluate (exe_ctx, expr_locals, decl_map, reg_ctx, m_data, 0, m_data.GetByteSize(), m_reg_kind, initial_value_ptr, result, error_ptr);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1288}
1289
1290
1291
1292bool
1293DWARFExpression::Evaluate
1294(
1295 ExecutionContext *exe_ctx,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1296 ClangExpressionVariableList *expr_locals,
1297 ClangExpressionDeclMap *decl_map,
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1298 RegisterContext *reg_ctx,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1299 const DataExtractor& opcodes,
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1300 const lldb::offset_t opcodes_offset,
1301 const lldb::offset_t opcodes_length,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1302 const uint32_t reg_kind,
1303 const Value* initial_value_ptr,
1304 Value& result,
1305 Error *error_ptr
1306)
1307{
Greg Clayton9e9f2192013-05-17 00:55:28 +0000[diff] [blame]1308
1309 if (opcodes_length == 0)
1310 {
1311 if (error_ptr)
1312 error_ptr->SetErrorString ("no location, value may have been optimized out");
1313 return false;
1314 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1315 std::vector<Value> stack;
1316
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1317 Process *process = NULL;
1318 StackFrame *frame = NULL;
1319
1320 if (exe_ctx)
1321 {
1322 process = exe_ctx->GetProcessPtr();
1323 frame = exe_ctx->GetFramePtr();
1324 }
1325 if (reg_ctx == NULL && frame)
1326 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1327
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1328 if (initial_value_ptr)
1329 stack.push_back(*initial_value_ptr);
1330
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1331 lldb::offset_t offset = opcodes_offset;
1332 const lldb::offset_t end_offset = opcodes_offset + opcodes_length;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1333 Value tmp;
1334 uint32_t reg_num;
1335
1336 // Make sure all of the data is available in opcodes.
1337 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1338 {
1339 if (error_ptr)
Greg Clayton9e9f2192013-05-17 00:55:28 +0000[diff] [blame]1340 error_ptr->SetErrorString ("invalid offset and/or length for opcodes buffer.");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1341 return false;
1342 }
Greg Clayton5160ce52013-03-27 23:08:40 +0000[diff] [blame]1343 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1344
1345
1346 while (opcodes.ValidOffset(offset) && offset < end_offset)
1347 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1348 const lldb::offset_t op_offset = offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1349 const uint8_t op = opcodes.GetU8(&offset);
1350
Sean Callanan7dd98122011-10-14 20:34:21 +0000[diff] [blame]1351 if (log && log->GetVerbose())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1352 {
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1353 size_t count = stack.size();
Jason Molendafd54b362011-09-20 21:44:10 +0000[diff] [blame]1354 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1355 for (size_t i=0; i<count; ++i)
1356 {
1357 StreamString new_value;
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1358 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1359 stack[i].Dump(&new_value);
Sean Callananf06ba8d2010-06-23 00:47:48 +0000[diff] [blame]1360 log->Printf(" %s", new_value.GetData());
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1361 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1362 log->Printf("0x%8.8" PRIx64 ": %s", op_offset, DW_OP_value_to_name(op));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1363 }
1364 switch (op)
1365 {
1366 //----------------------------------------------------------------------
1367 // The DW_OP_addr operation has a single operand that encodes a machine
1368 // address and whose size is the size of an address on the target machine.
1369 //----------------------------------------------------------------------
1370 case DW_OP_addr:
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]1371 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1372 stack.back().SetValueType (Value::eValueTypeFileAddress);
1373 break;
1374
1375 //----------------------------------------------------------------------
1376 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1377 // shared libraries that have a location like:
1378 // DW_OP_addr(0x1000)
1379 // If this address resides in a shared library, then this virtual
1380 // address won't make sense when it is evaluated in the context of a
1381 // running process where shared libraries have been slid. To account for
1382 // this, this new address type where we can store the section pointer
1383 // and a 4 byte offset.
1384 //----------------------------------------------------------------------
1385// case DW_OP_addr_sect_offset4:
1386// {
1387// result_type = eResultTypeFileAddress;
1388// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1389// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1390//
1391// Address so_addr (sect, sect_offset);
1392// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1393// if (load_addr != LLDB_INVALID_ADDRESS)
1394// {
1395// // We successfully resolve a file address to a load
1396// // address.
1397// stack.push_back(load_addr);
1398// break;
1399// }
1400// else
1401// {
1402// // We were able
1403// if (error_ptr)
1404// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1405// return false;
1406// }
1407// }
1408// break;
1409
1410 //----------------------------------------------------------------------
1411 // OPCODE: DW_OP_deref
1412 // OPERANDS: none
1413 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1414 // The value retrieved from that address is pushed. The size of the
1415 // data retrieved from the dereferenced address is the size of an
1416 // address on the target machine.
1417 //----------------------------------------------------------------------
1418 case DW_OP_deref:
1419 {
1420 Value::ValueType value_type = stack.back().GetValueType();
1421 switch (value_type)
1422 {
1423 case Value::eValueTypeHostAddress:
1424 {
1425 void *src = (void *)stack.back().GetScalar().ULongLong();
1426 intptr_t ptr;
1427 ::memcpy (&ptr, src, sizeof(void *));
1428 stack.back().GetScalar() = ptr;
1429 stack.back().ClearContext();
1430 }
1431 break;
1432 case Value::eValueTypeLoadAddress:
1433 if (exe_ctx)
1434 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1435 if (process)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1436 {
1437 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1438 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1439 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1440 Error error;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1441 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1442 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1443 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1444 lldb::offset_t addr_data_offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1445 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1446 stack.back().ClearContext();
1447 }
1448 else
1449 {
1450 if (error_ptr)
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1451 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1452 pointer_addr,
1453 error.AsCString());
1454 return false;
1455 }
1456 }
1457 else
1458 {
1459 if (error_ptr)
1460 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1461 return false;
1462 }
1463 }
1464 else
1465 {
1466 if (error_ptr)
1467 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1468 return false;
1469 }
1470 break;
1471
1472 default:
1473 break;
1474 }
1475
1476 }
1477 break;
1478
1479 //----------------------------------------------------------------------
1480 // OPCODE: DW_OP_deref_size
1481 // OPERANDS: 1
1482 // 1 - uint8_t that specifies the size of the data to dereference.
1483 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1484 // stack entry and treats it as an address. The value retrieved from that
1485 // address is pushed. In the DW_OP_deref_size operation, however, the
1486 // size in bytes of the data retrieved from the dereferenced address is
1487 // specified by the single operand. This operand is a 1-byte unsigned
1488 // integral constant whose value may not be larger than the size of an
1489 // address on the target machine. The data retrieved is zero extended
1490 // to the size of an address on the target machine before being pushed
1491 // on the expression stack.
1492 //----------------------------------------------------------------------
1493 case DW_OP_deref_size:
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1494 {
1495 uint8_t size = opcodes.GetU8(&offset);
1496 Value::ValueType value_type = stack.back().GetValueType();
1497 switch (value_type)
1498 {
1499 case Value::eValueTypeHostAddress:
1500 {
1501 void *src = (void *)stack.back().GetScalar().ULongLong();
1502 intptr_t ptr;
1503 ::memcpy (&ptr, src, sizeof(void *));
1504 // I can't decide whether the size operand should apply to the bytes in their
1505 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1506 // but I'll opt for assuming big endian regardless.
1507 switch (size)
1508 {
1509 case 1: ptr = ptr & 0xff; break;
1510 case 2: ptr = ptr & 0xffff; break;
1511 case 3: ptr = ptr & 0xffffff; break;
1512 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendac1903402010-11-29 21:38:58 +0000[diff] [blame]1513 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1514 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1515 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1516 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1517 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1518 default: break;
1519 }
1520 stack.back().GetScalar() = ptr;
1521 stack.back().ClearContext();
1522 }
1523 break;
1524 case Value::eValueTypeLoadAddress:
1525 if (exe_ctx)
1526 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1527 if (process)
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1528 {
1529 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1530 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1531 Error error;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1532 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1533 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1534 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1535 lldb::offset_t addr_data_offset = 0;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1536 switch (size)
1537 {
1538 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1539 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1540 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1541 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1542 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1543 }
1544 stack.back().ClearContext();
1545 }
1546 else
1547 {
1548 if (error_ptr)
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1549 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1550 pointer_addr,
1551 error.AsCString());
1552 return false;
1553 }
1554 }
1555 else
1556 {
1557 if (error_ptr)
1558 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1559 return false;
1560 }
1561 }
1562 else
1563 {
1564 if (error_ptr)
1565 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1566 return false;
1567 }
1568 break;
1569
1570 default:
1571 break;
1572 }
1573
1574 }
1575 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1576
1577 //----------------------------------------------------------------------
1578 // OPCODE: DW_OP_xderef_size
1579 // OPERANDS: 1
1580 // 1 - uint8_t that specifies the size of the data to dereference.
1581 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1582 // the top of the stack is treated as an address. The second stack
Greg Clayton1b72fcb2010-08-24 00:45:41 +0000[diff] [blame]1583 // entry is treated as an "address space identifier" for those
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1584 // architectures that support multiple address spaces. The top two
1585 // stack elements are popped, a data item is retrieved through an
1586 // implementation-defined address calculation and pushed as the new
1587 // stack top. In the DW_OP_xderef_size operation, however, the size in
1588 // bytes of the data retrieved from the dereferenced address is
1589 // specified by the single operand. This operand is a 1-byte unsigned
1590 // integral constant whose value may not be larger than the size of an
1591 // address on the target machine. The data retrieved is zero extended
1592 // to the size of an address on the target machine before being pushed
1593 // on the expression stack.
1594 //----------------------------------------------------------------------
1595 case DW_OP_xderef_size:
1596 if (error_ptr)
1597 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1598 return false;
1599 //----------------------------------------------------------------------
1600 // OPCODE: DW_OP_xderef
1601 // OPERANDS: none
1602 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1603 // the top of the stack is treated as an address. The second stack entry
1604 // is treated as an "address space identifier" for those architectures
1605 // that support multiple address spaces. The top two stack elements are
1606 // popped, a data item is retrieved through an implementation-defined
1607 // address calculation and pushed as the new stack top. The size of the
1608 // data retrieved from the dereferenced address is the size of an address
1609 // on the target machine.
1610 //----------------------------------------------------------------------
1611 case DW_OP_xderef:
1612 if (error_ptr)
1613 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1614 return false;
1615
1616 //----------------------------------------------------------------------
1617 // All DW_OP_constXXX opcodes have a single operand as noted below:
1618 //
1619 // Opcode Operand 1
1620 // --------------- ----------------------------------------------------
1621 // DW_OP_const1u 1-byte unsigned integer constant
1622 // DW_OP_const1s 1-byte signed integer constant
1623 // DW_OP_const2u 2-byte unsigned integer constant
1624 // DW_OP_const2s 2-byte signed integer constant
1625 // DW_OP_const4u 4-byte unsigned integer constant
1626 // DW_OP_const4s 4-byte signed integer constant
1627 // DW_OP_const8u 8-byte unsigned integer constant
1628 // DW_OP_const8s 8-byte signed integer constant
1629 // DW_OP_constu unsigned LEB128 integer constant
1630 // DW_OP_consts signed LEB128 integer constant
1631 //----------------------------------------------------------------------
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]1632 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1633 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1634 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1635 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1636 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1637 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1638 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1639 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1640 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1641 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1642
1643 //----------------------------------------------------------------------
1644 // OPCODE: DW_OP_dup
1645 // OPERANDS: none
1646 // DESCRIPTION: duplicates the value at the top of the stack
1647 //----------------------------------------------------------------------
1648 case DW_OP_dup:
1649 if (stack.empty())
1650 {
1651 if (error_ptr)
1652 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1653 return false;
1654 }
1655 else
1656 stack.push_back(stack.back());
1657 break;
1658
1659 //----------------------------------------------------------------------
1660 // OPCODE: DW_OP_drop
1661 // OPERANDS: none
1662 // DESCRIPTION: pops the value at the top of the stack
1663 //----------------------------------------------------------------------
1664 case DW_OP_drop:
1665 if (stack.empty())
1666 {
1667 if (error_ptr)
1668 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1669 return false;
1670 }
1671 else
1672 stack.pop_back();
1673 break;
1674
1675 //----------------------------------------------------------------------
1676 // OPCODE: DW_OP_over
1677 // OPERANDS: none
1678 // DESCRIPTION: Duplicates the entry currently second in the stack at
1679 // the top of the stack.
1680 //----------------------------------------------------------------------
1681 case DW_OP_over:
1682 if (stack.size() < 2)
1683 {
1684 if (error_ptr)
1685 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1686 return false;
1687 }
1688 else
1689 stack.push_back(stack[stack.size() - 2]);
1690 break;
1691
1692
1693 //----------------------------------------------------------------------
1694 // OPCODE: DW_OP_pick
1695 // OPERANDS: uint8_t index into the current stack
1696 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1697 // inclusive) is pushed on the stack
1698 //----------------------------------------------------------------------
1699 case DW_OP_pick:
1700 {
1701 uint8_t pick_idx = opcodes.GetU8(&offset);
1702 if (pick_idx < stack.size())
1703 stack.push_back(stack[pick_idx]);
1704 else
1705 {
1706 if (error_ptr)
1707 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1708 return false;
1709 }
1710 }
1711 break;
1712
1713 //----------------------------------------------------------------------
1714 // OPCODE: DW_OP_swap
1715 // OPERANDS: none
1716 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1717 // of the stack becomes the second stack entry, and the second entry
1718 // becomes the top of the stack
1719 //----------------------------------------------------------------------
1720 case DW_OP_swap:
1721 if (stack.size() < 2)
1722 {
1723 if (error_ptr)
1724 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1725 return false;
1726 }
1727 else
1728 {
1729 tmp = stack.back();
1730 stack.back() = stack[stack.size() - 2];
1731 stack[stack.size() - 2] = tmp;
1732 }
1733 break;
1734
1735 //----------------------------------------------------------------------
1736 // OPCODE: DW_OP_rot
1737 // OPERANDS: none
1738 // DESCRIPTION: Rotates the first three stack entries. The entry at
1739 // the top of the stack becomes the third stack entry, the second
1740 // entry becomes the top of the stack, and the third entry becomes
1741 // the second entry.
1742 //----------------------------------------------------------------------
1743 case DW_OP_rot:
1744 if (stack.size() < 3)
1745 {
1746 if (error_ptr)
1747 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1748 return false;
1749 }
1750 else
1751 {
1752 size_t last_idx = stack.size() - 1;
1753 Value old_top = stack[last_idx];
1754 stack[last_idx] = stack[last_idx - 1];
1755 stack[last_idx - 1] = stack[last_idx - 2];
1756 stack[last_idx - 2] = old_top;
1757 }
1758 break;
1759
1760 //----------------------------------------------------------------------
1761 // OPCODE: DW_OP_abs
1762 // OPERANDS: none
1763 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1764 // value and pushes its absolute value. If the absolute value can not be
1765 // represented, the result is undefined.
1766 //----------------------------------------------------------------------
1767 case DW_OP_abs:
1768 if (stack.empty())
1769 {
1770 if (error_ptr)
1771 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1772 return false;
1773 }
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1774 else if (stack.back().ResolveValue(exe_ctx).AbsoluteValue() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1775 {
1776 if (error_ptr)
1777 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1778 return false;
1779 }
1780 break;
1781
1782 //----------------------------------------------------------------------
1783 // OPCODE: DW_OP_and
1784 // OPERANDS: none
1785 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1786 // operation on the two, and pushes the result.
1787 //----------------------------------------------------------------------
1788 case DW_OP_and:
1789 if (stack.size() < 2)
1790 {
1791 if (error_ptr)
1792 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1793 return false;
1794 }
1795 else
1796 {
1797 tmp = stack.back();
1798 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1799 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) & tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1800 }
1801 break;
1802
1803 //----------------------------------------------------------------------
1804 // OPCODE: DW_OP_div
1805 // OPERANDS: none
1806 // DESCRIPTION: pops the top two stack values, divides the former second
1807 // entry by the former top of the stack using signed division, and
1808 // pushes the result.
1809 //----------------------------------------------------------------------
1810 case DW_OP_div:
1811 if (stack.size() < 2)
1812 {
1813 if (error_ptr)
1814 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1815 return false;
1816 }
1817 else
1818 {
1819 tmp = stack.back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1820 if (tmp.ResolveValue(exe_ctx).IsZero())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1821 {
1822 if (error_ptr)
1823 error_ptr->SetErrorString("Divide by zero.");
1824 return false;
1825 }
1826 else
1827 {
1828 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1829 stack.back() = stack.back().ResolveValue(exe_ctx) / tmp.ResolveValue(exe_ctx);
1830 if (!stack.back().ResolveValue(exe_ctx).IsValid())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1831 {
1832 if (error_ptr)
1833 error_ptr->SetErrorString("Divide failed.");
1834 return false;
1835 }
1836 }
1837 }
1838 break;
1839
1840 //----------------------------------------------------------------------
1841 // OPCODE: DW_OP_minus
1842 // OPERANDS: none
1843 // DESCRIPTION: pops the top two stack values, subtracts the former top
1844 // of the stack from the former second entry, and pushes the result.
1845 //----------------------------------------------------------------------
1846 case DW_OP_minus:
1847 if (stack.size() < 2)
1848 {
1849 if (error_ptr)
1850 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1851 return false;
1852 }
1853 else
1854 {
1855 tmp = stack.back();
1856 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1857 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) - tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1858 }
1859 break;
1860
1861 //----------------------------------------------------------------------
1862 // OPCODE: DW_OP_mod
1863 // OPERANDS: none
1864 // DESCRIPTION: pops the top two stack values and pushes the result of
1865 // the calculation: former second stack entry modulo the former top of
1866 // the stack.
1867 //----------------------------------------------------------------------
1868 case DW_OP_mod:
1869 if (stack.size() < 2)
1870 {
1871 if (error_ptr)
1872 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1873 return false;
1874 }
1875 else
1876 {
1877 tmp = stack.back();
1878 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1879 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) % tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1880 }
1881 break;
1882
1883
1884 //----------------------------------------------------------------------
1885 // OPCODE: DW_OP_mul
1886 // OPERANDS: none
1887 // DESCRIPTION: pops the top two stack entries, multiplies them
1888 // together, and pushes the result.
1889 //----------------------------------------------------------------------
1890 case DW_OP_mul:
1891 if (stack.size() < 2)
1892 {
1893 if (error_ptr)
1894 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1895 return false;
1896 }
1897 else
1898 {
1899 tmp = stack.back();
1900 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1901 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) * tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1902 }
1903 break;
1904
1905 //----------------------------------------------------------------------
1906 // OPCODE: DW_OP_neg
1907 // OPERANDS: none
1908 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1909 //----------------------------------------------------------------------
1910 case DW_OP_neg:
1911 if (stack.empty())
1912 {
1913 if (error_ptr)
1914 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1915 return false;
1916 }
1917 else
1918 {
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1919 if (stack.back().ResolveValue(exe_ctx).UnaryNegate() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1920 {
1921 if (error_ptr)
1922 error_ptr->SetErrorString("Unary negate failed.");
1923 return false;
1924 }
1925 }
1926 break;
1927
1928 //----------------------------------------------------------------------
1929 // OPCODE: DW_OP_not
1930 // OPERANDS: none
1931 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1932 // complement
1933 //----------------------------------------------------------------------
1934 case DW_OP_not:
1935 if (stack.empty())
1936 {
1937 if (error_ptr)
1938 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1939 return false;
1940 }
1941 else
1942 {
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1943 if (stack.back().ResolveValue(exe_ctx).OnesComplement() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1944 {
1945 if (error_ptr)
1946 error_ptr->SetErrorString("Logical NOT failed.");
1947 return false;
1948 }
1949 }
1950 break;
1951
1952 //----------------------------------------------------------------------
1953 // OPCODE: DW_OP_or
1954 // OPERANDS: none
1955 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1956 // operation on the two, and pushes the result.
1957 //----------------------------------------------------------------------
1958 case DW_OP_or:
1959 if (stack.size() < 2)
1960 {
1961 if (error_ptr)
1962 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1963 return false;
1964 }
1965 else
1966 {
1967 tmp = stack.back();
1968 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1969 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) | tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1970 }
1971 break;
1972
1973 //----------------------------------------------------------------------
1974 // OPCODE: DW_OP_plus
1975 // OPERANDS: none
1976 // DESCRIPTION: pops the top two stack entries, adds them together, and
1977 // pushes the result.
1978 //----------------------------------------------------------------------
1979 case DW_OP_plus:
1980 if (stack.size() < 2)
1981 {
1982 if (error_ptr)
1983 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1984 return false;
1985 }
1986 else
1987 {
1988 tmp = stack.back();
1989 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1990 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) + tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1991 }
1992 break;
1993
1994 //----------------------------------------------------------------------
1995 // OPCODE: DW_OP_plus_uconst
1996 // OPERANDS: none
1997 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1998 // constant operand and pushes the result.
1999 //----------------------------------------------------------------------
2000 case DW_OP_plus_uconst:
2001 if (stack.empty())
2002 {
2003 if (error_ptr)
2004 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
2005 return false;
2006 }
2007 else
2008 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2009 const uint64_t uconst_value = opcodes.GetULEB128(&offset);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2010 // Implicit conversion from a UINT to a Scalar...
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2011 stack.back().ResolveValue(exe_ctx) += uconst_value;
2012 if (!stack.back().ResolveValue(exe_ctx).IsValid())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2013 {
2014 if (error_ptr)
2015 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
2016 return false;
2017 }
2018 }
2019 break;
2020
2021 //----------------------------------------------------------------------
2022 // OPCODE: DW_OP_shl
2023 // OPERANDS: none
2024 // DESCRIPTION: pops the top two stack entries, shifts the former
2025 // second entry left by the number of bits specified by the former top
2026 // of the stack, and pushes the result.
2027 //----------------------------------------------------------------------
2028 case DW_OP_shl:
2029 if (stack.size() < 2)
2030 {
2031 if (error_ptr)
2032 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
2033 return false;
2034 }
2035 else
2036 {
2037 tmp = stack.back();
2038 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2039 stack.back().ResolveValue(exe_ctx) <<= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2040 }
2041 break;
2042
2043 //----------------------------------------------------------------------
2044 // OPCODE: DW_OP_shr
2045 // OPERANDS: none
2046 // DESCRIPTION: pops the top two stack entries, shifts the former second
2047 // entry right logically (filling with zero bits) by the number of bits
2048 // specified by the former top of the stack, and pushes the result.
2049 //----------------------------------------------------------------------
2050 case DW_OP_shr:
2051 if (stack.size() < 2)
2052 {
2053 if (error_ptr)
2054 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2055 return false;
2056 }
2057 else
2058 {
2059 tmp = stack.back();
2060 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2061 if (stack.back().ResolveValue(exe_ctx).ShiftRightLogical(tmp.ResolveValue(exe_ctx)) == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2062 {
2063 if (error_ptr)
2064 error_ptr->SetErrorString("DW_OP_shr failed.");
2065 return false;
2066 }
2067 }
2068 break;
2069
2070 //----------------------------------------------------------------------
2071 // OPCODE: DW_OP_shra
2072 // OPERANDS: none
2073 // DESCRIPTION: pops the top two stack entries, shifts the former second
2074 // entry right arithmetically (divide the magnitude by 2, keep the same
2075 // sign for the result) by the number of bits specified by the former
2076 // top of the stack, and pushes the result.
2077 //----------------------------------------------------------------------
2078 case DW_OP_shra:
2079 if (stack.size() < 2)
2080 {
2081 if (error_ptr)
2082 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2083 return false;
2084 }
2085 else
2086 {
2087 tmp = stack.back();
2088 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2089 stack.back().ResolveValue(exe_ctx) >>= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2090 }
2091 break;
2092
2093 //----------------------------------------------------------------------
2094 // OPCODE: DW_OP_xor
2095 // OPERANDS: none
2096 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2097 // exclusive-or operation on the two, and pushes the result.
2098 //----------------------------------------------------------------------
2099 case DW_OP_xor:
2100 if (stack.size() < 2)
2101 {
2102 if (error_ptr)
2103 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2104 return false;
2105 }
2106 else
2107 {
2108 tmp = stack.back();
2109 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2110 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) ^ tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2111 }
2112 break;
2113
2114
2115 //----------------------------------------------------------------------
2116 // OPCODE: DW_OP_skip
2117 // OPERANDS: int16_t
2118 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2119 // signed integer constant. The 2-byte constant is the number of bytes
2120 // of the DWARF expression to skip forward or backward from the current
2121 // operation, beginning after the 2-byte constant.
2122 //----------------------------------------------------------------------
2123 case DW_OP_skip:
2124 {
2125 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2126 lldb::offset_t new_offset = offset + skip_offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2127 if (new_offset >= opcodes_offset && new_offset < end_offset)
2128 offset = new_offset;
2129 else
2130 {
2131 if (error_ptr)
2132 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2133 return false;
2134 }
2135 }
2136 break;
2137
2138 //----------------------------------------------------------------------
2139 // OPCODE: DW_OP_bra
2140 // OPERANDS: int16_t
2141 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2142 // signed integer constant. This operation pops the top of stack. If
2143 // the value popped is not the constant 0, the 2-byte constant operand
2144 // is the number of bytes of the DWARF expression to skip forward or
2145 // backward from the current operation, beginning after the 2-byte
2146 // constant.
2147 //----------------------------------------------------------------------
2148 case DW_OP_bra:
2149 {
2150 tmp = stack.back();
2151 stack.pop_back();
2152 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2153 Scalar zero(0);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2154 if (tmp.ResolveValue(exe_ctx) != zero)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2155 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2156 lldb::offset_t new_offset = offset + bra_offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2157 if (new_offset >= opcodes_offset && new_offset < end_offset)
2158 offset = new_offset;
2159 else
2160 {
2161 if (error_ptr)
2162 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
2163 return false;
2164 }
2165 }
2166 }
2167 break;
2168
2169 //----------------------------------------------------------------------
2170 // OPCODE: DW_OP_eq
2171 // OPERANDS: none
2172 // DESCRIPTION: pops the top two stack values, compares using the
2173 // equals (==) operator.
2174 // STACK RESULT: push the constant value 1 onto the stack if the result
2175 // of the operation is true or the constant value 0 if the result of the
2176 // operation is false.
2177 //----------------------------------------------------------------------
2178 case DW_OP_eq:
2179 if (stack.size() < 2)
2180 {
2181 if (error_ptr)
2182 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2183 return false;
2184 }
2185 else
2186 {
2187 tmp = stack.back();
2188 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2189 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) == tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2190 }
2191 break;
2192
2193 //----------------------------------------------------------------------
2194 // OPCODE: DW_OP_ge
2195 // OPERANDS: none
2196 // DESCRIPTION: pops the top two stack values, compares using the
2197 // greater than or equal to (>=) operator.
2198 // STACK RESULT: push the constant value 1 onto the stack if the result
2199 // of the operation is true or the constant value 0 if the result of the
2200 // operation is false.
2201 //----------------------------------------------------------------------
2202 case DW_OP_ge:
2203 if (stack.size() < 2)
2204 {
2205 if (error_ptr)
2206 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2207 return false;
2208 }
2209 else
2210 {
2211 tmp = stack.back();
2212 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2213 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) >= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2214 }
2215 break;
2216
2217 //----------------------------------------------------------------------
2218 // OPCODE: DW_OP_gt
2219 // OPERANDS: none
2220 // DESCRIPTION: pops the top two stack values, compares using the
2221 // greater than (>) operator.
2222 // STACK RESULT: push the constant value 1 onto the stack if the result
2223 // of the operation is true or the constant value 0 if the result of the
2224 // operation is false.
2225 //----------------------------------------------------------------------
2226 case DW_OP_gt:
2227 if (stack.size() < 2)
2228 {
2229 if (error_ptr)
2230 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2231 return false;
2232 }
2233 else
2234 {
2235 tmp = stack.back();
2236 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2237 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) > tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2238 }
2239 break;
2240
2241 //----------------------------------------------------------------------
2242 // OPCODE: DW_OP_le
2243 // OPERANDS: none
2244 // DESCRIPTION: pops the top two stack values, compares using the
2245 // less than or equal to (<=) operator.
2246 // STACK RESULT: push the constant value 1 onto the stack if the result
2247 // of the operation is true or the constant value 0 if the result of the
2248 // operation is false.
2249 //----------------------------------------------------------------------
2250 case DW_OP_le:
2251 if (stack.size() < 2)
2252 {
2253 if (error_ptr)
2254 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2255 return false;
2256 }
2257 else
2258 {
2259 tmp = stack.back();
2260 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2261 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) <= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2262 }
2263 break;
2264
2265 //----------------------------------------------------------------------
2266 // OPCODE: DW_OP_lt
2267 // OPERANDS: none
2268 // DESCRIPTION: pops the top two stack values, compares using the
2269 // less than (<) operator.
2270 // STACK RESULT: push the constant value 1 onto the stack if the result
2271 // of the operation is true or the constant value 0 if the result of the
2272 // operation is false.
2273 //----------------------------------------------------------------------
2274 case DW_OP_lt:
2275 if (stack.size() < 2)
2276 {
2277 if (error_ptr)
2278 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2279 return false;
2280 }
2281 else
2282 {
2283 tmp = stack.back();
2284 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2285 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) < tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2286 }
2287 break;
2288
2289 //----------------------------------------------------------------------
2290 // OPCODE: DW_OP_ne
2291 // OPERANDS: none
2292 // DESCRIPTION: pops the top two stack values, compares using the
2293 // not equal (!=) operator.
2294 // STACK RESULT: push the constant value 1 onto the stack if the result
2295 // of the operation is true or the constant value 0 if the result of the
2296 // operation is false.
2297 //----------------------------------------------------------------------
2298 case DW_OP_ne:
2299 if (stack.size() < 2)
2300 {
2301 if (error_ptr)
2302 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2303 return false;
2304 }
2305 else
2306 {
2307 tmp = stack.back();
2308 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2309 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) != tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2310 }
2311 break;
2312
2313 //----------------------------------------------------------------------
2314 // OPCODE: DW_OP_litn
2315 // OPERANDS: none
2316 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2317 // STACK RESULT: push the unsigned literal constant value onto the top
2318 // of the stack.
2319 //----------------------------------------------------------------------
2320 case DW_OP_lit0:
2321 case DW_OP_lit1:
2322 case DW_OP_lit2:
2323 case DW_OP_lit3:
2324 case DW_OP_lit4:
2325 case DW_OP_lit5:
2326 case DW_OP_lit6:
2327 case DW_OP_lit7:
2328 case DW_OP_lit8:
2329 case DW_OP_lit9:
2330 case DW_OP_lit10:
2331 case DW_OP_lit11:
2332 case DW_OP_lit12:
2333 case DW_OP_lit13:
2334 case DW_OP_lit14:
2335 case DW_OP_lit15:
2336 case DW_OP_lit16:
2337 case DW_OP_lit17:
2338 case DW_OP_lit18:
2339 case DW_OP_lit19:
2340 case DW_OP_lit20:
2341 case DW_OP_lit21:
2342 case DW_OP_lit22:
2343 case DW_OP_lit23:
2344 case DW_OP_lit24:
2345 case DW_OP_lit25:
2346 case DW_OP_lit26:
2347 case DW_OP_lit27:
2348 case DW_OP_lit28:
2349 case DW_OP_lit29:
2350 case DW_OP_lit30:
2351 case DW_OP_lit31:
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]2352 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2353 break;
2354
2355 //----------------------------------------------------------------------
2356 // OPCODE: DW_OP_regN
2357 // OPERANDS: none
2358 // DESCRIPTION: Push the value in register n on the top of the stack.
2359 //----------------------------------------------------------------------
2360 case DW_OP_reg0:
2361 case DW_OP_reg1:
2362 case DW_OP_reg2:
2363 case DW_OP_reg3:
2364 case DW_OP_reg4:
2365 case DW_OP_reg5:
2366 case DW_OP_reg6:
2367 case DW_OP_reg7:
2368 case DW_OP_reg8:
2369 case DW_OP_reg9:
2370 case DW_OP_reg10:
2371 case DW_OP_reg11:
2372 case DW_OP_reg12:
2373 case DW_OP_reg13:
2374 case DW_OP_reg14:
2375 case DW_OP_reg15:
2376 case DW_OP_reg16:
2377 case DW_OP_reg17:
2378 case DW_OP_reg18:
2379 case DW_OP_reg19:
2380 case DW_OP_reg20:
2381 case DW_OP_reg21:
2382 case DW_OP_reg22:
2383 case DW_OP_reg23:
2384 case DW_OP_reg24:
2385 case DW_OP_reg25:
2386 case DW_OP_reg26:
2387 case DW_OP_reg27:
2388 case DW_OP_reg28:
2389 case DW_OP_reg29:
2390 case DW_OP_reg30:
2391 case DW_OP_reg31:
2392 {
2393 reg_num = op - DW_OP_reg0;
2394
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2395 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2396 stack.push_back(tmp);
2397 else
2398 return false;
2399 }
2400 break;
2401 //----------------------------------------------------------------------
2402 // OPCODE: DW_OP_regx
2403 // OPERANDS:
2404 // ULEB128 literal operand that encodes the register.
2405 // DESCRIPTION: Push the value in register on the top of the stack.
2406 //----------------------------------------------------------------------
2407 case DW_OP_regx:
2408 {
2409 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2410 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2411 stack.push_back(tmp);
2412 else
2413 return false;
2414 }
2415 break;
2416
2417 //----------------------------------------------------------------------
2418 // OPCODE: DW_OP_bregN
2419 // OPERANDS:
2420 // SLEB128 offset from register N
2421 // DESCRIPTION: Value is in memory at the address specified by register
2422 // N plus an offset.
2423 //----------------------------------------------------------------------
2424 case DW_OP_breg0:
2425 case DW_OP_breg1:
2426 case DW_OP_breg2:
2427 case DW_OP_breg3:
2428 case DW_OP_breg4:
2429 case DW_OP_breg5:
2430 case DW_OP_breg6:
2431 case DW_OP_breg7:
2432 case DW_OP_breg8:
2433 case DW_OP_breg9:
2434 case DW_OP_breg10:
2435 case DW_OP_breg11:
2436 case DW_OP_breg12:
2437 case DW_OP_breg13:
2438 case DW_OP_breg14:
2439 case DW_OP_breg15:
2440 case DW_OP_breg16:
2441 case DW_OP_breg17:
2442 case DW_OP_breg18:
2443 case DW_OP_breg19:
2444 case DW_OP_breg20:
2445 case DW_OP_breg21:
2446 case DW_OP_breg22:
2447 case DW_OP_breg23:
2448 case DW_OP_breg24:
2449 case DW_OP_breg25:
2450 case DW_OP_breg26:
2451 case DW_OP_breg27:
2452 case DW_OP_breg28:
2453 case DW_OP_breg29:
2454 case DW_OP_breg30:
2455 case DW_OP_breg31:
2456 {
2457 reg_num = op - DW_OP_breg0;
2458
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2459 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2460 {
2461 int64_t breg_offset = opcodes.GetSLEB128(&offset);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2462 tmp.ResolveValue(exe_ctx) += (uint64_t)breg_offset;
Sean Callanand1a5e012012-01-06 18:24:47 +0000[diff] [blame]2463 tmp.ClearContext();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2464 stack.push_back(tmp);
2465 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2466 }
2467 else
2468 return false;
2469 }
2470 break;
2471 //----------------------------------------------------------------------
2472 // OPCODE: DW_OP_bregx
2473 // OPERANDS: 2
2474 // ULEB128 literal operand that encodes the register.
2475 // SLEB128 offset from register N
2476 // DESCRIPTION: Value is in memory at the address specified by register
2477 // N plus an offset.
2478 //----------------------------------------------------------------------
2479 case DW_OP_bregx:
2480 {
2481 reg_num = opcodes.GetULEB128(&offset);
2482
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2483 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2484 {
2485 int64_t breg_offset = opcodes.GetSLEB128(&offset);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2486 tmp.ResolveValue(exe_ctx) += (uint64_t)breg_offset;
Sean Callanand1a5e012012-01-06 18:24:47 +0000[diff] [blame]2487 tmp.ClearContext();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2488 stack.push_back(tmp);
2489 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2490 }
2491 else
2492 return false;
2493 }
2494 break;
2495
2496 case DW_OP_fbreg:
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2497 if (exe_ctx)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2498 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2499 if (frame)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2500 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2501 Scalar value;
2502 if (frame->GetFrameBaseValue(value, error_ptr))
2503 {
2504 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2505 value += fbreg_offset;
2506 stack.push_back(value);
2507 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2508 }
2509 else
2510 return false;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2511 }
2512 else
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2513 {
2514 if (error_ptr)
2515 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2516 return false;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2517 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2518 }
2519 else
2520 {
2521 if (error_ptr)
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2522 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2523 return false;
2524 }
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2525
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2526 break;
2527
2528 //----------------------------------------------------------------------
2529 // OPCODE: DW_OP_nop
2530 // OPERANDS: none
2531 // DESCRIPTION: A place holder. It has no effect on the location stack
2532 // or any of its values.
2533 //----------------------------------------------------------------------
2534 case DW_OP_nop:
2535 break;
2536
2537 //----------------------------------------------------------------------
2538 // OPCODE: DW_OP_piece
2539 // OPERANDS: 1
2540 // ULEB128: byte size of the piece
2541 // DESCRIPTION: The operand describes the size in bytes of the piece of
2542 // the object referenced by the DWARF expression whose result is at the
2543 // top of the stack. If the piece is located in a register, but does not
2544 // occupy the entire register, the placement of the piece within that
2545 // register is defined by the ABI.
2546 //
2547 // Many compilers store a single variable in sets of registers, or store
2548 // a variable partially in memory and partially in registers.
2549 // DW_OP_piece provides a way of describing how large a part of a
2550 // variable a particular DWARF expression refers to.
2551 //----------------------------------------------------------------------
2552 case DW_OP_piece:
2553 if (error_ptr)
2554 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2555 return false;
2556
2557 //----------------------------------------------------------------------
2558 // OPCODE: DW_OP_push_object_address
2559 // OPERANDS: none
2560 // DESCRIPTION: Pushes the address of the object currently being
2561 // evaluated as part of evaluation of a user presented expression.
2562 // This object may correspond to an independent variable described by
2563 // its own DIE or it may be a component of an array, structure, or class
2564 // whose address has been dynamically determined by an earlier step
2565 // during user expression evaluation.
2566 //----------------------------------------------------------------------
2567 case DW_OP_push_object_address:
2568 if (error_ptr)
2569 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2570 return false;
2571
2572 //----------------------------------------------------------------------
2573 // OPCODE: DW_OP_call2
2574 // OPERANDS:
2575 // uint16_t compile unit relative offset of a DIE
2576 // DESCRIPTION: Performs subroutine calls during evaluation
2577 // of a DWARF expression. The operand is the 2-byte unsigned offset
2578 // of a debugging information entry in the current compilation unit.
2579 //
2580 // Operand interpretation is exactly like that for DW_FORM_ref2.
2581 //
2582 // This operation transfers control of DWARF expression evaluation
2583 // to the DW_AT_location attribute of the referenced DIE. If there is
2584 // no such attribute, then there is no effect. Execution of the DWARF
2585 // expression of a DW_AT_location attribute may add to and/or remove from
2586 // values on the stack. Execution returns to the point following the call
2587 // when the end of the attribute is reached. Values on the stack at the
2588 // time of the call may be used as parameters by the called expression
2589 // and values left on the stack by the called expression may be used as
2590 // return values by prior agreement between the calling and called
2591 // expressions.
2592 //----------------------------------------------------------------------
2593 case DW_OP_call2:
2594 if (error_ptr)
2595 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2596 return false;
2597 //----------------------------------------------------------------------
2598 // OPCODE: DW_OP_call4
2599 // OPERANDS: 1
2600 // uint32_t compile unit relative offset of a DIE
2601 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2602 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2603 // of a debugging information entry in the current compilation unit.
2604 //
2605 // Operand interpretation DW_OP_call4 is exactly like that for
2606 // DW_FORM_ref4.
2607 //
2608 // This operation transfers control of DWARF expression evaluation
2609 // to the DW_AT_location attribute of the referenced DIE. If there is
2610 // no such attribute, then there is no effect. Execution of the DWARF
2611 // expression of a DW_AT_location attribute may add to and/or remove from
2612 // values on the stack. Execution returns to the point following the call
2613 // when the end of the attribute is reached. Values on the stack at the
2614 // time of the call may be used as parameters by the called expression
2615 // and values left on the stack by the called expression may be used as
2616 // return values by prior agreement between the calling and called
2617 // expressions.
2618 //----------------------------------------------------------------------
2619 case DW_OP_call4:
2620 if (error_ptr)
2621 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2622 return false;
2623
Andrew Kaylor9e9f1db2013-03-06 21:13:09 +0000[diff] [blame]2624 //----------------------------------------------------------------------
2625 // OPCODE: DW_OP_stack_value
2626 // OPERANDS: None
2627 // DESCRIPTION: Specifies that the object does not exist in memory but
2628 // rather is a constant value. The value from the top of the stack is
2629 // the value to be used. This is the actual object value and not the
2630 // location.
2631 //----------------------------------------------------------------------
2632 case DW_OP_stack_value:
2633 stack.back().SetValueType(Value::eValueTypeScalar);
2634 break;
Ashok Thirumurthi6e264d32013-07-29 16:05:11 +0000[diff] [blame]2635
2636 //----------------------------------------------------------------------
2637 // OPCODE: DW_OP_call_frame_cfa
2638 // OPERANDS: None
2639 // DESCRIPTION: Specifies a DWARF expression that pushes the value of
2640 // the canonical frame address consistent with the call frame information
2641 // located in .debug_frame (or in the FDEs of the eh_frame section).
2642 //----------------------------------------------------------------------
2643 case DW_OP_call_frame_cfa:
2644 if (frame)
2645 {
2646 // Note that we don't have to parse FDEs because this DWARF expression
2647 // is commonly evaluated with a valid stack frame.
2648 StackID id = frame->GetStackID();
2649 addr_t cfa = id.GetCallFrameAddress();
2650 if (cfa != LLDB_INVALID_ADDRESS)
2651 {
2652 stack.push_back(Scalar(cfa));
2653 stack.back().SetValueType (Value::eValueTypeHostAddress);
2654 }
2655 else
2656 if (error_ptr)
2657 error_ptr->SetErrorString ("Stack frame does not include a canonical frame address for DW_OP_call_frame_cfa opcode.");
2658 }
2659 else
2660 {
2661 if (error_ptr)
2662 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_call_frame_cfa opcode.");
2663 return false;
2664 }
2665 break;
Daniel Malea8f0c4462013-07-30 21:26:24 +0000[diff] [blame]2666 default:
Ashok Thirumurthi3e0afb82013-07-31 03:56:45 +0000[diff] [blame]2667 if (log)
2668 log->Printf("Unhandled opcode %s in DWARFExpression.", DW_OP_value_to_name(op));
2669 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2670 }
2671 }
2672
2673 if (stack.empty())
2674 {
2675 if (error_ptr)
2676 error_ptr->SetErrorString ("Stack empty after evaluation.");
2677 return false;
2678 }
Sean Callanan7dd98122011-10-14 20:34:21 +0000[diff] [blame]2679 else if (log && log->GetVerbose())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2680 {
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2681 size_t count = stack.size();
Jason Molendafd54b362011-09-20 21:44:10 +0000[diff] [blame]2682 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2683 for (size_t i=0; i<count; ++i)
2684 {
2685 StreamString new_value;
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]2686 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2687 stack[i].Dump(&new_value);
Sean Callananf06ba8d2010-06-23 00:47:48 +0000[diff] [blame]2688 log->Printf(" %s", new_value.GetData());
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2689 }
2690 }
2691
2692 result = stack.back();
2693 return true; // Return true on success
2694}
2695