Gitiles
Code Review Sign In
gerrit-public.fairphone.software / fp2-dev / platform / external / lldb / d14d5185b97d32c70e9b5c7ebd4b1e2077afc98b / . / source / Expression / DWARFExpression.cpp
blob: 55f9f03819debaddd2fcb4df10672f7d2784cdcf [file] [log] [blame]
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1//===-- DWARFExpression.cpp -------------------------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Expression/DWARFExpression.h"
11
12#include <vector>
13
14#include "lldb/Core/dwarf.h"
15#include "lldb/Core/Log.h"
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]16#include "lldb/Core/RegisterValue.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]17#include "lldb/Core/StreamString.h"
18#include "lldb/Core/Scalar.h"
19#include "lldb/Core/Value.h"
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]20#include "lldb/Core/VMRange.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]21
22#include "lldb/Expression/ClangExpressionDeclMap.h"
23#include "lldb/Expression/ClangExpressionVariable.h"
24
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]25#include "lldb/Host/Endian.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]26
27#include "lldb/lldb-private-log.h"
28
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]29#include "lldb/Symbol/ClangASTType.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]30#include "lldb/Symbol/ClangASTContext.h"
31#include "lldb/Symbol/Type.h"
32
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]33#include "lldb/Target/ABI.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]34#include "lldb/Target/ExecutionContext.h"
35#include "lldb/Target/Process.h"
36#include "lldb/Target/RegisterContext.h"
37#include "lldb/Target/StackFrame.h"
38
39using namespace lldb;
40using namespace lldb_private;
41
42const char *
43DW_OP_value_to_name (uint32_t val)
44{
45 static char invalid[100];
46 switch (val) {
47 case 0x03: return "DW_OP_addr";
48 case 0x06: return "DW_OP_deref";
49 case 0x08: return "DW_OP_const1u";
50 case 0x09: return "DW_OP_const1s";
51 case 0x0a: return "DW_OP_const2u";
52 case 0x0b: return "DW_OP_const2s";
53 case 0x0c: return "DW_OP_const4u";
54 case 0x0d: return "DW_OP_const4s";
55 case 0x0e: return "DW_OP_const8u";
56 case 0x0f: return "DW_OP_const8s";
57 case 0x10: return "DW_OP_constu";
58 case 0x11: return "DW_OP_consts";
59 case 0x12: return "DW_OP_dup";
60 case 0x13: return "DW_OP_drop";
61 case 0x14: return "DW_OP_over";
62 case 0x15: return "DW_OP_pick";
63 case 0x16: return "DW_OP_swap";
64 case 0x17: return "DW_OP_rot";
65 case 0x18: return "DW_OP_xderef";
66 case 0x19: return "DW_OP_abs";
67 case 0x1a: return "DW_OP_and";
68 case 0x1b: return "DW_OP_div";
69 case 0x1c: return "DW_OP_minus";
70 case 0x1d: return "DW_OP_mod";
71 case 0x1e: return "DW_OP_mul";
72 case 0x1f: return "DW_OP_neg";
73 case 0x20: return "DW_OP_not";
74 case 0x21: return "DW_OP_or";
75 case 0x22: return "DW_OP_plus";
76 case 0x23: return "DW_OP_plus_uconst";
77 case 0x24: return "DW_OP_shl";
78 case 0x25: return "DW_OP_shr";
79 case 0x26: return "DW_OP_shra";
80 case 0x27: return "DW_OP_xor";
81 case 0x2f: return "DW_OP_skip";
82 case 0x28: return "DW_OP_bra";
83 case 0x29: return "DW_OP_eq";
84 case 0x2a: return "DW_OP_ge";
85 case 0x2b: return "DW_OP_gt";
86 case 0x2c: return "DW_OP_le";
87 case 0x2d: return "DW_OP_lt";
88 case 0x2e: return "DW_OP_ne";
89 case 0x30: return "DW_OP_lit0";
90 case 0x31: return "DW_OP_lit1";
91 case 0x32: return "DW_OP_lit2";
92 case 0x33: return "DW_OP_lit3";
93 case 0x34: return "DW_OP_lit4";
94 case 0x35: return "DW_OP_lit5";
95 case 0x36: return "DW_OP_lit6";
96 case 0x37: return "DW_OP_lit7";
97 case 0x38: return "DW_OP_lit8";
98 case 0x39: return "DW_OP_lit9";
99 case 0x3a: return "DW_OP_lit10";
100 case 0x3b: return "DW_OP_lit11";
101 case 0x3c: return "DW_OP_lit12";
102 case 0x3d: return "DW_OP_lit13";
103 case 0x3e: return "DW_OP_lit14";
104 case 0x3f: return "DW_OP_lit15";
105 case 0x40: return "DW_OP_lit16";
106 case 0x41: return "DW_OP_lit17";
107 case 0x42: return "DW_OP_lit18";
108 case 0x43: return "DW_OP_lit19";
109 case 0x44: return "DW_OP_lit20";
110 case 0x45: return "DW_OP_lit21";
111 case 0x46: return "DW_OP_lit22";
112 case 0x47: return "DW_OP_lit23";
113 case 0x48: return "DW_OP_lit24";
114 case 0x49: return "DW_OP_lit25";
115 case 0x4a: return "DW_OP_lit26";
116 case 0x4b: return "DW_OP_lit27";
117 case 0x4c: return "DW_OP_lit28";
118 case 0x4d: return "DW_OP_lit29";
119 case 0x4e: return "DW_OP_lit30";
120 case 0x4f: return "DW_OP_lit31";
121 case 0x50: return "DW_OP_reg0";
122 case 0x51: return "DW_OP_reg1";
123 case 0x52: return "DW_OP_reg2";
124 case 0x53: return "DW_OP_reg3";
125 case 0x54: return "DW_OP_reg4";
126 case 0x55: return "DW_OP_reg5";
127 case 0x56: return "DW_OP_reg6";
128 case 0x57: return "DW_OP_reg7";
129 case 0x58: return "DW_OP_reg8";
130 case 0x59: return "DW_OP_reg9";
131 case 0x5a: return "DW_OP_reg10";
132 case 0x5b: return "DW_OP_reg11";
133 case 0x5c: return "DW_OP_reg12";
134 case 0x5d: return "DW_OP_reg13";
135 case 0x5e: return "DW_OP_reg14";
136 case 0x5f: return "DW_OP_reg15";
137 case 0x60: return "DW_OP_reg16";
138 case 0x61: return "DW_OP_reg17";
139 case 0x62: return "DW_OP_reg18";
140 case 0x63: return "DW_OP_reg19";
141 case 0x64: return "DW_OP_reg20";
142 case 0x65: return "DW_OP_reg21";
143 case 0x66: return "DW_OP_reg22";
144 case 0x67: return "DW_OP_reg23";
145 case 0x68: return "DW_OP_reg24";
146 case 0x69: return "DW_OP_reg25";
147 case 0x6a: return "DW_OP_reg26";
148 case 0x6b: return "DW_OP_reg27";
149 case 0x6c: return "DW_OP_reg28";
150 case 0x6d: return "DW_OP_reg29";
151 case 0x6e: return "DW_OP_reg30";
152 case 0x6f: return "DW_OP_reg31";
153 case 0x70: return "DW_OP_breg0";
154 case 0x71: return "DW_OP_breg1";
155 case 0x72: return "DW_OP_breg2";
156 case 0x73: return "DW_OP_breg3";
157 case 0x74: return "DW_OP_breg4";
158 case 0x75: return "DW_OP_breg5";
159 case 0x76: return "DW_OP_breg6";
160 case 0x77: return "DW_OP_breg7";
161 case 0x78: return "DW_OP_breg8";
162 case 0x79: return "DW_OP_breg9";
163 case 0x7a: return "DW_OP_breg10";
164 case 0x7b: return "DW_OP_breg11";
165 case 0x7c: return "DW_OP_breg12";
166 case 0x7d: return "DW_OP_breg13";
167 case 0x7e: return "DW_OP_breg14";
168 case 0x7f: return "DW_OP_breg15";
169 case 0x80: return "DW_OP_breg16";
170 case 0x81: return "DW_OP_breg17";
171 case 0x82: return "DW_OP_breg18";
172 case 0x83: return "DW_OP_breg19";
173 case 0x84: return "DW_OP_breg20";
174 case 0x85: return "DW_OP_breg21";
175 case 0x86: return "DW_OP_breg22";
176 case 0x87: return "DW_OP_breg23";
177 case 0x88: return "DW_OP_breg24";
178 case 0x89: return "DW_OP_breg25";
179 case 0x8a: return "DW_OP_breg26";
180 case 0x8b: return "DW_OP_breg27";
181 case 0x8c: return "DW_OP_breg28";
182 case 0x8d: return "DW_OP_breg29";
183 case 0x8e: return "DW_OP_breg30";
184 case 0x8f: return "DW_OP_breg31";
185 case 0x90: return "DW_OP_regx";
186 case 0x91: return "DW_OP_fbreg";
187 case 0x92: return "DW_OP_bregx";
188 case 0x93: return "DW_OP_piece";
189 case 0x94: return "DW_OP_deref_size";
190 case 0x95: return "DW_OP_xderef_size";
191 case 0x96: return "DW_OP_nop";
192 case 0x97: return "DW_OP_push_object_address";
193 case 0x98: return "DW_OP_call2";
194 case 0x99: return "DW_OP_call4";
195 case 0x9a: return "DW_OP_call_ref";
196 case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
197 case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
198 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
199 case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
200 case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
201 case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
202 case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
203 case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
204 case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
205 case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
206 case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
207 case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
208 case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
209 default:
210 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
211 return invalid;
212 }
213}
214
215
216//----------------------------------------------------------------------
217// DWARFExpression constructor
218//----------------------------------------------------------------------
219DWARFExpression::DWARFExpression() :
220 m_data(),
221 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]222 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]223{
224}
225
226DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
227 m_data(rhs.m_data),
228 m_reg_kind (rhs.m_reg_kind),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]229 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]230{
231}
232
233
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]234DWARFExpression::DWARFExpression(const DataExtractor& data, uint32_t data_offset, uint32_t data_length) :
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]235 m_data(data, data_offset, data_length),
236 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]237 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]238{
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]239}
240
241//----------------------------------------------------------------------
242// Destructor
243//----------------------------------------------------------------------
244DWARFExpression::~DWARFExpression()
245{
246}
247
248
249bool
250DWARFExpression::IsValid() const
251{
252 return m_data.GetByteSize() > 0;
253}
254
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]255void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]256DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]257{
258 m_data = data;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]259}
260
261void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]262DWARFExpression::SetOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]263{
264 m_data.SetData(data, data_offset, data_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]265}
266
267void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]268DWARFExpression::DumpLocation (Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]269{
270 if (!m_data.ValidOffsetForDataOfSize(offset, length))
271 return;
272 const uint32_t start_offset = offset;
273 const uint32_t end_offset = offset + length;
274 while (m_data.ValidOffset(offset) && offset < end_offset)
275 {
276 const uint32_t op_offset = offset;
277 const uint8_t op = m_data.GetU8(&offset);
278
279 switch (level)
280 {
Greg Clayton54e7afa2010-07-09 20:39:50 +0000[diff] [blame]281 default:
282 break;
283
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]284 case lldb::eDescriptionLevelBrief:
285 if (offset > start_offset)
286 s->PutChar(' ');
287 break;
288
289 case lldb::eDescriptionLevelFull:
290 case lldb::eDescriptionLevelVerbose:
291 if (offset > start_offset)
292 s->EOL();
293 s->Indent();
294 if (level == lldb::eDescriptionLevelFull)
295 break;
296 // Fall through for verbose and print offset and DW_OP prefix..
297 s->Printf("0x%8.8x: %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
298 break;
299 }
300
301 switch (op)
302 {
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]303 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
304 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
305 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
306 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
307 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
308 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
309 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
310 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
311 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
312 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]313 case DW_OP_constu: s->Printf("DW_OP_constu(0x%llx) ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
314 case DW_OP_consts: s->Printf("DW_OP_consts(0x%lld) ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]315 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
316 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
317 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
318 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
319 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
320 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
321 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
322 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
323 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
324 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
325 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
326 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
327 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
328 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
329 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
330 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
331 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]332 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]333 s->Printf("DW_OP_plus_uconst(0x%llx) ", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]334 break;
335
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]336 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
337 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
338 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
339 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
340 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
341 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
342 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
343 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
344 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
345 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
346 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
347 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]348
349 case DW_OP_lit0: // 0x30
350 case DW_OP_lit1: // 0x31
351 case DW_OP_lit2: // 0x32
352 case DW_OP_lit3: // 0x33
353 case DW_OP_lit4: // 0x34
354 case DW_OP_lit5: // 0x35
355 case DW_OP_lit6: // 0x36
356 case DW_OP_lit7: // 0x37
357 case DW_OP_lit8: // 0x38
358 case DW_OP_lit9: // 0x39
359 case DW_OP_lit10: // 0x3A
360 case DW_OP_lit11: // 0x3B
361 case DW_OP_lit12: // 0x3C
362 case DW_OP_lit13: // 0x3D
363 case DW_OP_lit14: // 0x3E
364 case DW_OP_lit15: // 0x3F
365 case DW_OP_lit16: // 0x40
366 case DW_OP_lit17: // 0x41
367 case DW_OP_lit18: // 0x42
368 case DW_OP_lit19: // 0x43
369 case DW_OP_lit20: // 0x44
370 case DW_OP_lit21: // 0x45
371 case DW_OP_lit22: // 0x46
372 case DW_OP_lit23: // 0x47
373 case DW_OP_lit24: // 0x48
374 case DW_OP_lit25: // 0x49
375 case DW_OP_lit26: // 0x4A
376 case DW_OP_lit27: // 0x4B
377 case DW_OP_lit28: // 0x4C
378 case DW_OP_lit29: // 0x4D
379 case DW_OP_lit30: // 0x4E
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]380 case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]381
382 case DW_OP_reg0: // 0x50
383 case DW_OP_reg1: // 0x51
384 case DW_OP_reg2: // 0x52
385 case DW_OP_reg3: // 0x53
386 case DW_OP_reg4: // 0x54
387 case DW_OP_reg5: // 0x55
388 case DW_OP_reg6: // 0x56
389 case DW_OP_reg7: // 0x57
390 case DW_OP_reg8: // 0x58
391 case DW_OP_reg9: // 0x59
392 case DW_OP_reg10: // 0x5A
393 case DW_OP_reg11: // 0x5B
394 case DW_OP_reg12: // 0x5C
395 case DW_OP_reg13: // 0x5D
396 case DW_OP_reg14: // 0x5E
397 case DW_OP_reg15: // 0x5F
398 case DW_OP_reg16: // 0x60
399 case DW_OP_reg17: // 0x61
400 case DW_OP_reg18: // 0x62
401 case DW_OP_reg19: // 0x63
402 case DW_OP_reg20: // 0x64
403 case DW_OP_reg21: // 0x65
404 case DW_OP_reg22: // 0x66
405 case DW_OP_reg23: // 0x67
406 case DW_OP_reg24: // 0x68
407 case DW_OP_reg25: // 0x69
408 case DW_OP_reg26: // 0x6A
409 case DW_OP_reg27: // 0x6B
410 case DW_OP_reg28: // 0x6C
411 case DW_OP_reg29: // 0x6D
412 case DW_OP_reg30: // 0x6E
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]413 case DW_OP_reg31: // 0x6F
414 {
415 uint32_t reg_num = op - DW_OP_reg0;
416 if (abi)
417 {
418 RegisterInfo reg_info;
419 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
420 {
421 if (reg_info.name)
422 {
423 s->PutCString (reg_info.name);
424 break;
425 }
426 else if (reg_info.alt_name)
427 {
428 s->PutCString (reg_info.alt_name);
429 break;
430 }
431 }
432 }
433 s->Printf("DW_OP_reg%u", reg_num); break;
434 }
435 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]436
437 case DW_OP_breg0:
438 case DW_OP_breg1:
439 case DW_OP_breg2:
440 case DW_OP_breg3:
441 case DW_OP_breg4:
442 case DW_OP_breg5:
443 case DW_OP_breg6:
444 case DW_OP_breg7:
445 case DW_OP_breg8:
446 case DW_OP_breg9:
447 case DW_OP_breg10:
448 case DW_OP_breg11:
449 case DW_OP_breg12:
450 case DW_OP_breg13:
451 case DW_OP_breg14:
452 case DW_OP_breg15:
453 case DW_OP_breg16:
454 case DW_OP_breg17:
455 case DW_OP_breg18:
456 case DW_OP_breg19:
457 case DW_OP_breg20:
458 case DW_OP_breg21:
459 case DW_OP_breg22:
460 case DW_OP_breg23:
461 case DW_OP_breg24:
462 case DW_OP_breg25:
463 case DW_OP_breg26:
464 case DW_OP_breg27:
465 case DW_OP_breg28:
466 case DW_OP_breg29:
467 case DW_OP_breg30:
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]468 case DW_OP_breg31:
469 {
470 uint32_t reg_num = op - DW_OP_breg0;
471 int64_t reg_offset = m_data.GetSLEB128(&offset);
472 if (abi)
473 {
474 RegisterInfo reg_info;
475 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
476 {
477 if (reg_info.name)
478 {
479 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
480 break;
481 }
482 else if (reg_info.alt_name)
483 {
484 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
485 break;
486 }
487 }
488 }
489 s->Printf("DW_OP_breg%i(0x%llx)", reg_num, reg_offset);
490 }
491 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]492
493 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]494 {
495 uint64_t reg_num = m_data.GetULEB128(&offset);
496 if (abi)
497 {
498 RegisterInfo reg_info;
499 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
500 {
501 if (reg_info.name)
502 {
503 s->PutCString (reg_info.name);
504 break;
505 }
506 else if (reg_info.alt_name)
507 {
508 s->PutCString (reg_info.alt_name);
509 break;
510 }
511 }
512 }
513 s->Printf("DW_OP_regx(%llu)", reg_num); break;
514 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]515 break;
516 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]517 s->Printf("DW_OP_fbreg(%lli)",m_data.GetSLEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]518 break;
519 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]520 {
521 uint32_t reg_num = m_data.GetULEB128(&offset);
522 int64_t reg_offset = m_data.GetSLEB128(&offset);
523 if (abi)
524 {
525 RegisterInfo reg_info;
526 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
527 {
528 if (reg_info.name)
529 {
530 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
531 break;
532 }
533 else if (reg_info.alt_name)
534 {
535 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
536 break;
537 }
538 }
539 }
540 s->Printf("DW_OP_bregx(reg=%u,offset=%lli)", reg_num, reg_offset);
541 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]542 break;
543 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]544 s->Printf("DW_OP_piece(0x%llx)", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]545 break;
546 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]547 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]548 break;
549 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]550 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]551 break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]552 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
553 case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]554 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]555 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]556 break;
557 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]558 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]559 break;
560 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]561 s->Printf("DW_OP_call_ref(0x%8.8llx)", m_data.GetAddress(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]562 break;
563// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
564// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
565// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]566// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]567// break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]568// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
569// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]570 case DW_OP_APPLE_extern:
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]571 s->Printf("DW_OP_APPLE_extern(%llu)", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]572 break;
573 case DW_OP_APPLE_array_ref:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]574 s->PutCString("DW_OP_APPLE_array_ref");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]575 break;
576 case DW_OP_APPLE_uninit:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]577 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]578 break;
579 case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]580 s->PutCString("DW_OP_APPLE_assign");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]581 break;
582 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)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]583 s->PutCString("DW_OP_APPLE_address_of");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]584 break;
585 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)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]586 s->PutCString("DW_OP_APPLE_value_of");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]587 break;
588 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)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]589 s->PutCString("DW_OP_APPLE_deref_type");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]590 break;
591 case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]592 s->Printf("DW_OP_APPLE_expr_local(%llu)", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]593 break;
594 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
595 {
596 uint8_t float_length = m_data.GetU8(&offset);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]597 s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]598 m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
599 s->PutChar(')');
600 // Consume the float data
601 m_data.GetData(&offset, float_length);
602 }
603 break;
604 case DW_OP_APPLE_scalar_cast:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]605 s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]606 break;
607 case DW_OP_APPLE_clang_cast:
608 {
609 clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]610 s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]611 }
612 break;
613 case DW_OP_APPLE_clear:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]614 s->PutCString("DW_OP_APPLE_clear");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]615 break;
616 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]617 s->PutCString("DW_OP_APPLE_error");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]618 break;
619 }
620 }
621}
622
623void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]624DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]625{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]626 m_loclist_slide = slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]627}
628
629int
630DWARFExpression::GetRegisterKind ()
631{
632 return m_reg_kind;
633}
634
635void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]636DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]637{
638 m_reg_kind = reg_kind;
639}
640
641bool
642DWARFExpression::IsLocationList() const
643{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]644 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]645}
646
647void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]648DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]649{
650 if (IsLocationList())
651 {
652 // We have a location list
653 uint32_t offset = 0;
654 uint32_t count = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]655 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]656 while (m_data.ValidOffset(offset))
657 {
658 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
659 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
660 if (begin_addr_offset < end_addr_offset)
661 {
662 if (count > 0)
663 s->PutCString(", ");
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]664 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
665 addr_range.Dump(s, 0, 8);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]666 s->PutChar('{');
667 uint32_t location_length = m_data.GetU16(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]668 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]669 s->PutChar('}');
670 offset += location_length;
671 }
672 else if (begin_addr_offset == 0 && end_addr_offset == 0)
673 {
674 // The end of the location list is marked by both the start and end offset being zero
675 break;
676 }
677 else
678 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]679 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
680 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]681 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]682 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]683 // We have a new base address
684 if (count > 0)
685 s->PutCString(", ");
686 *s << "base_addr = " << end_addr_offset;
687 }
688 }
689
690 count++;
691 }
692 }
693 else
694 {
695 // We have a normal location that contains DW_OP location opcodes
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]696 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]697 }
698}
699
700static bool
701ReadRegisterValueAsScalar
702(
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]703 RegisterContext *reg_ctx,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]704 uint32_t reg_kind,
705 uint32_t reg_num,
706 Error *error_ptr,
707 Value &value
708)
709{
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]710 if (reg_ctx == NULL)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]711 {
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]712 if (error_ptr)
713 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]714 }
715 else
716 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]717 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]718 if (native_reg == LLDB_INVALID_REGNUM)
719 {
720 if (error_ptr)
721 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
722 }
723 else
724 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]725 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
726 RegisterValue reg_value;
727 if (reg_ctx->ReadRegister (reg_info, reg_value))
728 {
729 if (reg_value.GetScalarValue(value.GetScalar()))
730 {
731 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]732 value.SetContext (Value::eContextTypeRegisterInfo,
733 const_cast<RegisterInfo *>(reg_info));
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]734 if (error_ptr)
735 error_ptr->Clear();
736 return true;
737 }
738 else
739 {
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]740 // If we get this error, then we need to implement a value
741 // buffer in the dwarf expression evaluation function...
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]742 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]743 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
744 reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]745 }
746 }
747 else
748 {
749 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]750 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]751 }
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]752 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]753 }
754 return false;
755}
756
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]757//bool
758//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
759//{
760// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
761//}
762//
763//bool
764//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
765//{
766// if (load_addr == LLDB_INVALID_ADDRESS)
767// return false;
768//
769// if (IsLocationList())
770// {
771// uint32_t offset = 0;
772//
773// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
774//
775// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
776// return false;
777//
778// while (m_data.ValidOffset(offset))
779// {
780// // We need to figure out what the value is for the location.
781// addr_t lo_pc = m_data.GetAddress(&offset);
782// addr_t hi_pc = m_data.GetAddress(&offset);
783// if (lo_pc == 0 && hi_pc == 0)
784// break;
785// else
786// {
787// lo_pc += loc_list_base_addr;
788// hi_pc += loc_list_base_addr;
789//
790// if (lo_pc <= load_addr && load_addr < hi_pc)
791// return true;
792//
793// offset += m_data.GetU16(&offset);
794// }
795// }
796// }
797// return false;
798//}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]799
800bool
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]801DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]802{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]803 if (addr == LLDB_INVALID_ADDRESS)
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]804 return false;
805
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]806 if (IsLocationList())
807 {
808 uint32_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]809
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]810 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]811 return false;
812
813 while (m_data.ValidOffset(offset))
814 {
815 // We need to figure out what the value is for the location.
816 addr_t lo_pc = m_data.GetAddress(&offset);
817 addr_t hi_pc = m_data.GetAddress(&offset);
818 if (lo_pc == 0 && hi_pc == 0)
819 break;
820 else
821 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]822 lo_pc += loclist_base_addr - m_loclist_slide;
823 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]824
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]825 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]826 return true;
827
828 offset += m_data.GetU16(&offset);
829 }
830 }
831 }
832 return false;
833}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]834
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]835bool
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]836DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, uint32_t &offset, uint32_t &length)
837{
838 offset = 0;
839 if (!IsLocationList())
840 {
841 length = m_data.GetByteSize();
842 return true;
843 }
844
845 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
846 {
847 addr_t curr_base_addr = base_addr;
848
849 while (m_data.ValidOffset(offset))
850 {
851 // We need to figure out what the value is for the location.
852 addr_t lo_pc = m_data.GetAddress(&offset);
853 addr_t hi_pc = m_data.GetAddress(&offset);
854 if (lo_pc == 0 && hi_pc == 0)
855 {
856 break;
857 }
858 else
859 {
860 lo_pc += curr_base_addr - m_loclist_slide;
861 hi_pc += curr_base_addr - m_loclist_slide;
862
863 length = m_data.GetU16(&offset);
864
865 if (length > 0 && lo_pc <= pc && pc < hi_pc)
866 return true;
867
868 offset += length;
869 }
870 }
871 }
872 offset = UINT32_MAX;
873 length = 0;
874 return false;
875}
876
877bool
878DWARFExpression::DumpLocationForAddress (Stream *s,
879 lldb::DescriptionLevel level,
880 addr_t base_addr,
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]881 addr_t address,
882 ABI *abi)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]883{
884 uint32_t offset = 0;
885 uint32_t length = 0;
886
887 if (GetLocation (base_addr, address, offset, length))
888 {
889 if (length > 0)
890 {
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]891 DumpLocation(s, offset, length, level, abi);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]892 return true;
893 }
894 }
895 return false;
896}
897
898bool
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]899DWARFExpression::Evaluate
900(
901 ExecutionContextScope *exe_scope,
902 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]903 ClangExpressionVariableList *expr_locals,
904 ClangExpressionDeclMap *decl_map,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]905 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]906 const Value* initial_value_ptr,
907 Value& result,
908 Error *error_ptr
909) const
910{
911 ExecutionContext exe_ctx (exe_scope);
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]912 return Evaluate(&exe_ctx, ast_context, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]913}
914
915bool
916DWARFExpression::Evaluate
917(
918 ExecutionContext *exe_ctx,
919 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]920 ClangExpressionVariableList *expr_locals,
921 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]922 RegisterContext *reg_ctx,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]923 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]924 const Value* initial_value_ptr,
925 Value& result,
926 Error *error_ptr
927) const
928{
929 if (IsLocationList())
930 {
931 uint32_t offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]932 addr_t pc;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]933 StackFrame *frame = NULL;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]934 if (reg_ctx)
935 pc = reg_ctx->GetPC();
936 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]937 {
938 frame = exe_ctx->GetFramePtr();
939 pc = frame->GetRegisterContext()->GetPC();
940 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]941
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]942 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]943 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]944 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]945 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]946 if (error_ptr)
947 error_ptr->SetErrorString("Invalid PC in frame.");
948 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]949 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]950
951 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
952
953 while (m_data.ValidOffset(offset))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]954 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]955 // We need to figure out what the value is for the location.
956 addr_t lo_pc = m_data.GetAddress(&offset);
957 addr_t hi_pc = m_data.GetAddress(&offset);
958 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]959 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]960 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]961 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]962 else
963 {
964 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
965 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
966
967 uint16_t length = m_data.GetU16(&offset);
968
969 if (length > 0 && lo_pc <= pc && pc < hi_pc)
970 {
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]971 return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, offset, length, m_reg_kind, initial_value_ptr, result, error_ptr);
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]972 }
973 offset += length;
974 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]975 }
976 }
977 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]978 error_ptr->SetErrorString ("variable not available");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]979 return false;
980 }
981
982 // Not a location list, just a single expression.
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]983 return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, 0, m_data.GetByteSize(), m_reg_kind, initial_value_ptr, result, error_ptr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]984}
985
986
987
988bool
989DWARFExpression::Evaluate
990(
991 ExecutionContext *exe_ctx,
992 clang::ASTContext *ast_context,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]993 ClangExpressionVariableList *expr_locals,
994 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]995 RegisterContext *reg_ctx,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]996 const DataExtractor& opcodes,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]997 const uint32_t opcodes_offset,
998 const uint32_t opcodes_length,
999 const uint32_t reg_kind,
1000 const Value* initial_value_ptr,
1001 Value& result,
1002 Error *error_ptr
1003)
1004{
1005 std::vector<Value> stack;
1006
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1007 Process *process = NULL;
1008 StackFrame *frame = NULL;
1009
1010 if (exe_ctx)
1011 {
1012 process = exe_ctx->GetProcessPtr();
1013 frame = exe_ctx->GetFramePtr();
1014 }
1015 if (reg_ctx == NULL && frame)
1016 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1017
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1018 if (initial_value_ptr)
1019 stack.push_back(*initial_value_ptr);
1020
1021 uint32_t offset = opcodes_offset;
1022 const uint32_t end_offset = opcodes_offset + opcodes_length;
1023 Value tmp;
1024 uint32_t reg_num;
1025
1026 // Make sure all of the data is available in opcodes.
1027 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1028 {
1029 if (error_ptr)
1030 error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
1031 return false;
1032 }
Greg Claytone005f2c2010-11-06 01:53:30 +0000[diff] [blame]1033 LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1034
1035
1036 while (opcodes.ValidOffset(offset) && offset < end_offset)
1037 {
1038 const uint32_t op_offset = offset;
1039 const uint8_t op = opcodes.GetU8(&offset);
1040
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]1041 if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1042 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1043 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]1044 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1045 for (size_t i=0; i<count; ++i)
1046 {
1047 StreamString new_value;
1048 new_value.Printf("[%zu]", i);
1049 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]1050 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1051 }
1052 log->Printf("0x%8.8x: %s", op_offset, DW_OP_value_to_name(op));
1053 }
1054 switch (op)
1055 {
1056 //----------------------------------------------------------------------
1057 // The DW_OP_addr operation has a single operand that encodes a machine
1058 // address and whose size is the size of an address on the target machine.
1059 //----------------------------------------------------------------------
1060 case DW_OP_addr:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1061 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1062 stack.back().SetValueType (Value::eValueTypeFileAddress);
1063 break;
1064
1065 //----------------------------------------------------------------------
1066 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1067 // shared libraries that have a location like:
1068 // DW_OP_addr(0x1000)
1069 // If this address resides in a shared library, then this virtual
1070 // address won't make sense when it is evaluated in the context of a
1071 // running process where shared libraries have been slid. To account for
1072 // this, this new address type where we can store the section pointer
1073 // and a 4 byte offset.
1074 //----------------------------------------------------------------------
1075// case DW_OP_addr_sect_offset4:
1076// {
1077// result_type = eResultTypeFileAddress;
1078// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1079// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1080//
1081// Address so_addr (sect, sect_offset);
1082// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1083// if (load_addr != LLDB_INVALID_ADDRESS)
1084// {
1085// // We successfully resolve a file address to a load
1086// // address.
1087// stack.push_back(load_addr);
1088// break;
1089// }
1090// else
1091// {
1092// // We were able
1093// if (error_ptr)
1094// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1095// return false;
1096// }
1097// }
1098// break;
1099
1100 //----------------------------------------------------------------------
1101 // OPCODE: DW_OP_deref
1102 // OPERANDS: none
1103 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1104 // The value retrieved from that address is pushed. The size of the
1105 // data retrieved from the dereferenced address is the size of an
1106 // address on the target machine.
1107 //----------------------------------------------------------------------
1108 case DW_OP_deref:
1109 {
1110 Value::ValueType value_type = stack.back().GetValueType();
1111 switch (value_type)
1112 {
1113 case Value::eValueTypeHostAddress:
1114 {
1115 void *src = (void *)stack.back().GetScalar().ULongLong();
1116 intptr_t ptr;
1117 ::memcpy (&ptr, src, sizeof(void *));
1118 stack.back().GetScalar() = ptr;
1119 stack.back().ClearContext();
1120 }
1121 break;
1122 case Value::eValueTypeLoadAddress:
1123 if (exe_ctx)
1124 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1125 if (process)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1126 {
1127 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1128 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1129 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1130 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1131 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1132 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1133 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1134 uint32_t addr_data_offset = 0;
1135 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1136 stack.back().ClearContext();
1137 }
1138 else
1139 {
1140 if (error_ptr)
1141 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1142 pointer_addr,
1143 error.AsCString());
1144 return false;
1145 }
1146 }
1147 else
1148 {
1149 if (error_ptr)
1150 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1151 return false;
1152 }
1153 }
1154 else
1155 {
1156 if (error_ptr)
1157 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1158 return false;
1159 }
1160 break;
1161
1162 default:
1163 break;
1164 }
1165
1166 }
1167 break;
1168
1169 //----------------------------------------------------------------------
1170 // OPCODE: DW_OP_deref_size
1171 // OPERANDS: 1
1172 // 1 - uint8_t that specifies the size of the data to dereference.
1173 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1174 // stack entry and treats it as an address. The value retrieved from that
1175 // address is pushed. In the DW_OP_deref_size operation, however, the
1176 // size in bytes of the data retrieved from the dereferenced address is
1177 // specified by the single operand. This operand is a 1-byte unsigned
1178 // integral constant whose value may not be larger than the size of an
1179 // address on the target machine. The data retrieved is zero extended
1180 // to the size of an address on the target machine before being pushed
1181 // on the expression stack.
1182 //----------------------------------------------------------------------
1183 case DW_OP_deref_size:
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1184 {
1185 uint8_t size = opcodes.GetU8(&offset);
1186 Value::ValueType value_type = stack.back().GetValueType();
1187 switch (value_type)
1188 {
1189 case Value::eValueTypeHostAddress:
1190 {
1191 void *src = (void *)stack.back().GetScalar().ULongLong();
1192 intptr_t ptr;
1193 ::memcpy (&ptr, src, sizeof(void *));
1194 // I can't decide whether the size operand should apply to the bytes in their
1195 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1196 // but I'll opt for assuming big endian regardless.
1197 switch (size)
1198 {
1199 case 1: ptr = ptr & 0xff; break;
1200 case 2: ptr = ptr & 0xffff; break;
1201 case 3: ptr = ptr & 0xffffff; break;
1202 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendaa99bcaa2010-11-29 21:38:58 +0000[diff] [blame]1203 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1204 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1205 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1206 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1207 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1208 default: break;
1209 }
1210 stack.back().GetScalar() = ptr;
1211 stack.back().ClearContext();
1212 }
1213 break;
1214 case Value::eValueTypeLoadAddress:
1215 if (exe_ctx)
1216 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1217 if (process)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1218 {
1219 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1220 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1221 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1222 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1223 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1224 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1225 uint32_t addr_data_offset = 0;
1226 switch (size)
1227 {
1228 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1229 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1230 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1231 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1232 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1233 }
1234 stack.back().ClearContext();
1235 }
1236 else
1237 {
1238 if (error_ptr)
1239 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1240 pointer_addr,
1241 error.AsCString());
1242 return false;
1243 }
1244 }
1245 else
1246 {
1247 if (error_ptr)
1248 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1249 return false;
1250 }
1251 }
1252 else
1253 {
1254 if (error_ptr)
1255 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1256 return false;
1257 }
1258 break;
1259
1260 default:
1261 break;
1262 }
1263
1264 }
1265 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1266
1267 //----------------------------------------------------------------------
1268 // OPCODE: DW_OP_xderef_size
1269 // OPERANDS: 1
1270 // 1 - uint8_t that specifies the size of the data to dereference.
1271 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1272 // the top of the stack is treated as an address. The second stack
Greg Clayton33ed1702010-08-24 00:45:41 +0000[diff] [blame]1273 // entry is treated as an "address space identifier" for those
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1274 // architectures that support multiple address spaces. The top two
1275 // stack elements are popped, a data item is retrieved through an
1276 // implementation-defined address calculation and pushed as the new
1277 // stack top. In the DW_OP_xderef_size operation, however, the size in
1278 // bytes of the data retrieved from the dereferenced address is
1279 // specified by the single operand. This operand is a 1-byte unsigned
1280 // integral constant whose value may not be larger than the size of an
1281 // address on the target machine. The data retrieved is zero extended
1282 // to the size of an address on the target machine before being pushed
1283 // on the expression stack.
1284 //----------------------------------------------------------------------
1285 case DW_OP_xderef_size:
1286 if (error_ptr)
1287 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1288 return false;
1289 //----------------------------------------------------------------------
1290 // OPCODE: DW_OP_xderef
1291 // OPERANDS: none
1292 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1293 // the top of the stack is treated as an address. The second stack entry
1294 // is treated as an "address space identifier" for those architectures
1295 // that support multiple address spaces. The top two stack elements are
1296 // popped, a data item is retrieved through an implementation-defined
1297 // address calculation and pushed as the new stack top. The size of the
1298 // data retrieved from the dereferenced address is the size of an address
1299 // on the target machine.
1300 //----------------------------------------------------------------------
1301 case DW_OP_xderef:
1302 if (error_ptr)
1303 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1304 return false;
1305
1306 //----------------------------------------------------------------------
1307 // All DW_OP_constXXX opcodes have a single operand as noted below:
1308 //
1309 // Opcode Operand 1
1310 // --------------- ----------------------------------------------------
1311 // DW_OP_const1u 1-byte unsigned integer constant
1312 // DW_OP_const1s 1-byte signed integer constant
1313 // DW_OP_const2u 2-byte unsigned integer constant
1314 // DW_OP_const2s 2-byte signed integer constant
1315 // DW_OP_const4u 4-byte unsigned integer constant
1316 // DW_OP_const4s 4-byte signed integer constant
1317 // DW_OP_const8u 8-byte unsigned integer constant
1318 // DW_OP_const8s 8-byte signed integer constant
1319 // DW_OP_constu unsigned LEB128 integer constant
1320 // DW_OP_consts signed LEB128 integer constant
1321 //----------------------------------------------------------------------
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1322 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1323 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1324 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1325 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1326 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1327 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1328 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1329 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1330 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1331 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1332
1333 //----------------------------------------------------------------------
1334 // OPCODE: DW_OP_dup
1335 // OPERANDS: none
1336 // DESCRIPTION: duplicates the value at the top of the stack
1337 //----------------------------------------------------------------------
1338 case DW_OP_dup:
1339 if (stack.empty())
1340 {
1341 if (error_ptr)
1342 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1343 return false;
1344 }
1345 else
1346 stack.push_back(stack.back());
1347 break;
1348
1349 //----------------------------------------------------------------------
1350 // OPCODE: DW_OP_drop
1351 // OPERANDS: none
1352 // DESCRIPTION: pops the value at the top of the stack
1353 //----------------------------------------------------------------------
1354 case DW_OP_drop:
1355 if (stack.empty())
1356 {
1357 if (error_ptr)
1358 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1359 return false;
1360 }
1361 else
1362 stack.pop_back();
1363 break;
1364
1365 //----------------------------------------------------------------------
1366 // OPCODE: DW_OP_over
1367 // OPERANDS: none
1368 // DESCRIPTION: Duplicates the entry currently second in the stack at
1369 // the top of the stack.
1370 //----------------------------------------------------------------------
1371 case DW_OP_over:
1372 if (stack.size() < 2)
1373 {
1374 if (error_ptr)
1375 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1376 return false;
1377 }
1378 else
1379 stack.push_back(stack[stack.size() - 2]);
1380 break;
1381
1382
1383 //----------------------------------------------------------------------
1384 // OPCODE: DW_OP_pick
1385 // OPERANDS: uint8_t index into the current stack
1386 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1387 // inclusive) is pushed on the stack
1388 //----------------------------------------------------------------------
1389 case DW_OP_pick:
1390 {
1391 uint8_t pick_idx = opcodes.GetU8(&offset);
1392 if (pick_idx < stack.size())
1393 stack.push_back(stack[pick_idx]);
1394 else
1395 {
1396 if (error_ptr)
1397 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1398 return false;
1399 }
1400 }
1401 break;
1402
1403 //----------------------------------------------------------------------
1404 // OPCODE: DW_OP_swap
1405 // OPERANDS: none
1406 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1407 // of the stack becomes the second stack entry, and the second entry
1408 // becomes the top of the stack
1409 //----------------------------------------------------------------------
1410 case DW_OP_swap:
1411 if (stack.size() < 2)
1412 {
1413 if (error_ptr)
1414 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1415 return false;
1416 }
1417 else
1418 {
1419 tmp = stack.back();
1420 stack.back() = stack[stack.size() - 2];
1421 stack[stack.size() - 2] = tmp;
1422 }
1423 break;
1424
1425 //----------------------------------------------------------------------
1426 // OPCODE: DW_OP_rot
1427 // OPERANDS: none
1428 // DESCRIPTION: Rotates the first three stack entries. The entry at
1429 // the top of the stack becomes the third stack entry, the second
1430 // entry becomes the top of the stack, and the third entry becomes
1431 // the second entry.
1432 //----------------------------------------------------------------------
1433 case DW_OP_rot:
1434 if (stack.size() < 3)
1435 {
1436 if (error_ptr)
1437 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1438 return false;
1439 }
1440 else
1441 {
1442 size_t last_idx = stack.size() - 1;
1443 Value old_top = stack[last_idx];
1444 stack[last_idx] = stack[last_idx - 1];
1445 stack[last_idx - 1] = stack[last_idx - 2];
1446 stack[last_idx - 2] = old_top;
1447 }
1448 break;
1449
1450 //----------------------------------------------------------------------
1451 // OPCODE: DW_OP_abs
1452 // OPERANDS: none
1453 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1454 // value and pushes its absolute value. If the absolute value can not be
1455 // represented, the result is undefined.
1456 //----------------------------------------------------------------------
1457 case DW_OP_abs:
1458 if (stack.empty())
1459 {
1460 if (error_ptr)
1461 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1462 return false;
1463 }
1464 else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
1465 {
1466 if (error_ptr)
1467 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1468 return false;
1469 }
1470 break;
1471
1472 //----------------------------------------------------------------------
1473 // OPCODE: DW_OP_and
1474 // OPERANDS: none
1475 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1476 // operation on the two, and pushes the result.
1477 //----------------------------------------------------------------------
1478 case DW_OP_and:
1479 if (stack.size() < 2)
1480 {
1481 if (error_ptr)
1482 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1483 return false;
1484 }
1485 else
1486 {
1487 tmp = stack.back();
1488 stack.pop_back();
1489 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
1490 }
1491 break;
1492
1493 //----------------------------------------------------------------------
1494 // OPCODE: DW_OP_div
1495 // OPERANDS: none
1496 // DESCRIPTION: pops the top two stack values, divides the former second
1497 // entry by the former top of the stack using signed division, and
1498 // pushes the result.
1499 //----------------------------------------------------------------------
1500 case DW_OP_div:
1501 if (stack.size() < 2)
1502 {
1503 if (error_ptr)
1504 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1505 return false;
1506 }
1507 else
1508 {
1509 tmp = stack.back();
1510 if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
1511 {
1512 if (error_ptr)
1513 error_ptr->SetErrorString("Divide by zero.");
1514 return false;
1515 }
1516 else
1517 {
1518 stack.pop_back();
1519 stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
1520 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1521 {
1522 if (error_ptr)
1523 error_ptr->SetErrorString("Divide failed.");
1524 return false;
1525 }
1526 }
1527 }
1528 break;
1529
1530 //----------------------------------------------------------------------
1531 // OPCODE: DW_OP_minus
1532 // OPERANDS: none
1533 // DESCRIPTION: pops the top two stack values, subtracts the former top
1534 // of the stack from the former second entry, and pushes the result.
1535 //----------------------------------------------------------------------
1536 case DW_OP_minus:
1537 if (stack.size() < 2)
1538 {
1539 if (error_ptr)
1540 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1541 return false;
1542 }
1543 else
1544 {
1545 tmp = stack.back();
1546 stack.pop_back();
1547 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
1548 }
1549 break;
1550
1551 //----------------------------------------------------------------------
1552 // OPCODE: DW_OP_mod
1553 // OPERANDS: none
1554 // DESCRIPTION: pops the top two stack values and pushes the result of
1555 // the calculation: former second stack entry modulo the former top of
1556 // the stack.
1557 //----------------------------------------------------------------------
1558 case DW_OP_mod:
1559 if (stack.size() < 2)
1560 {
1561 if (error_ptr)
1562 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1563 return false;
1564 }
1565 else
1566 {
1567 tmp = stack.back();
1568 stack.pop_back();
1569 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
1570 }
1571 break;
1572
1573
1574 //----------------------------------------------------------------------
1575 // OPCODE: DW_OP_mul
1576 // OPERANDS: none
1577 // DESCRIPTION: pops the top two stack entries, multiplies them
1578 // together, and pushes the result.
1579 //----------------------------------------------------------------------
1580 case DW_OP_mul:
1581 if (stack.size() < 2)
1582 {
1583 if (error_ptr)
1584 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1585 return false;
1586 }
1587 else
1588 {
1589 tmp = stack.back();
1590 stack.pop_back();
1591 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
1592 }
1593 break;
1594
1595 //----------------------------------------------------------------------
1596 // OPCODE: DW_OP_neg
1597 // OPERANDS: none
1598 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1599 //----------------------------------------------------------------------
1600 case DW_OP_neg:
1601 if (stack.empty())
1602 {
1603 if (error_ptr)
1604 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1605 return false;
1606 }
1607 else
1608 {
1609 if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
1610 {
1611 if (error_ptr)
1612 error_ptr->SetErrorString("Unary negate failed.");
1613 return false;
1614 }
1615 }
1616 break;
1617
1618 //----------------------------------------------------------------------
1619 // OPCODE: DW_OP_not
1620 // OPERANDS: none
1621 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1622 // complement
1623 //----------------------------------------------------------------------
1624 case DW_OP_not:
1625 if (stack.empty())
1626 {
1627 if (error_ptr)
1628 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1629 return false;
1630 }
1631 else
1632 {
1633 if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
1634 {
1635 if (error_ptr)
1636 error_ptr->SetErrorString("Logical NOT failed.");
1637 return false;
1638 }
1639 }
1640 break;
1641
1642 //----------------------------------------------------------------------
1643 // OPCODE: DW_OP_or
1644 // OPERANDS: none
1645 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1646 // operation on the two, and pushes the result.
1647 //----------------------------------------------------------------------
1648 case DW_OP_or:
1649 if (stack.size() < 2)
1650 {
1651 if (error_ptr)
1652 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1653 return false;
1654 }
1655 else
1656 {
1657 tmp = stack.back();
1658 stack.pop_back();
1659 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
1660 }
1661 break;
1662
1663 //----------------------------------------------------------------------
1664 // OPCODE: DW_OP_plus
1665 // OPERANDS: none
1666 // DESCRIPTION: pops the top two stack entries, adds them together, and
1667 // pushes the result.
1668 //----------------------------------------------------------------------
1669 case DW_OP_plus:
1670 if (stack.size() < 2)
1671 {
1672 if (error_ptr)
1673 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1674 return false;
1675 }
1676 else
1677 {
1678 tmp = stack.back();
1679 stack.pop_back();
1680 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
1681 }
1682 break;
1683
1684 //----------------------------------------------------------------------
1685 // OPCODE: DW_OP_plus_uconst
1686 // OPERANDS: none
1687 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1688 // constant operand and pushes the result.
1689 //----------------------------------------------------------------------
1690 case DW_OP_plus_uconst:
1691 if (stack.empty())
1692 {
1693 if (error_ptr)
1694 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
1695 return false;
1696 }
1697 else
1698 {
1699 uint32_t uconst_value = opcodes.GetULEB128(&offset);
1700 // Implicit conversion from a UINT to a Scalar...
1701 stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
1702 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1703 {
1704 if (error_ptr)
1705 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
1706 return false;
1707 }
1708 }
1709 break;
1710
1711 //----------------------------------------------------------------------
1712 // OPCODE: DW_OP_shl
1713 // OPERANDS: none
1714 // DESCRIPTION: pops the top two stack entries, shifts the former
1715 // second entry left by the number of bits specified by the former top
1716 // of the stack, and pushes the result.
1717 //----------------------------------------------------------------------
1718 case DW_OP_shl:
1719 if (stack.size() < 2)
1720 {
1721 if (error_ptr)
1722 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
1723 return false;
1724 }
1725 else
1726 {
1727 tmp = stack.back();
1728 stack.pop_back();
1729 stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
1730 }
1731 break;
1732
1733 //----------------------------------------------------------------------
1734 // OPCODE: DW_OP_shr
1735 // OPERANDS: none
1736 // DESCRIPTION: pops the top two stack entries, shifts the former second
1737 // entry right logically (filling with zero bits) by the number of bits
1738 // specified by the former top of the stack, and pushes the result.
1739 //----------------------------------------------------------------------
1740 case DW_OP_shr:
1741 if (stack.size() < 2)
1742 {
1743 if (error_ptr)
1744 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
1745 return false;
1746 }
1747 else
1748 {
1749 tmp = stack.back();
1750 stack.pop_back();
1751 if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
1752 {
1753 if (error_ptr)
1754 error_ptr->SetErrorString("DW_OP_shr failed.");
1755 return false;
1756 }
1757 }
1758 break;
1759
1760 //----------------------------------------------------------------------
1761 // OPCODE: DW_OP_shra
1762 // OPERANDS: none
1763 // DESCRIPTION: pops the top two stack entries, shifts the former second
1764 // entry right arithmetically (divide the magnitude by 2, keep the same
1765 // sign for the result) by the number of bits specified by the former
1766 // top of the stack, and pushes the result.
1767 //----------------------------------------------------------------------
1768 case DW_OP_shra:
1769 if (stack.size() < 2)
1770 {
1771 if (error_ptr)
1772 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
1773 return false;
1774 }
1775 else
1776 {
1777 tmp = stack.back();
1778 stack.pop_back();
1779 stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
1780 }
1781 break;
1782
1783 //----------------------------------------------------------------------
1784 // OPCODE: DW_OP_xor
1785 // OPERANDS: none
1786 // DESCRIPTION: pops the top two stack entries, performs the bitwise
1787 // exclusive-or operation on the two, and pushes the result.
1788 //----------------------------------------------------------------------
1789 case DW_OP_xor:
1790 if (stack.size() < 2)
1791 {
1792 if (error_ptr)
1793 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
1794 return false;
1795 }
1796 else
1797 {
1798 tmp = stack.back();
1799 stack.pop_back();
1800 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
1801 }
1802 break;
1803
1804
1805 //----------------------------------------------------------------------
1806 // OPCODE: DW_OP_skip
1807 // OPERANDS: int16_t
1808 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
1809 // signed integer constant. The 2-byte constant is the number of bytes
1810 // of the DWARF expression to skip forward or backward from the current
1811 // operation, beginning after the 2-byte constant.
1812 //----------------------------------------------------------------------
1813 case DW_OP_skip:
1814 {
1815 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
1816 uint32_t new_offset = offset + skip_offset;
1817 if (new_offset >= opcodes_offset && new_offset < end_offset)
1818 offset = new_offset;
1819 else
1820 {
1821 if (error_ptr)
1822 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
1823 return false;
1824 }
1825 }
1826 break;
1827
1828 //----------------------------------------------------------------------
1829 // OPCODE: DW_OP_bra
1830 // OPERANDS: int16_t
1831 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
1832 // signed integer constant. This operation pops the top of stack. If
1833 // the value popped is not the constant 0, the 2-byte constant operand
1834 // is the number of bytes of the DWARF expression to skip forward or
1835 // backward from the current operation, beginning after the 2-byte
1836 // constant.
1837 //----------------------------------------------------------------------
1838 case DW_OP_bra:
1839 {
1840 tmp = stack.back();
1841 stack.pop_back();
1842 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
1843 Scalar zero(0);
1844 if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
1845 {
1846 uint32_t new_offset = offset + bra_offset;
1847 if (new_offset >= opcodes_offset && new_offset < end_offset)
1848 offset = new_offset;
1849 else
1850 {
1851 if (error_ptr)
1852 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
1853 return false;
1854 }
1855 }
1856 }
1857 break;
1858
1859 //----------------------------------------------------------------------
1860 // OPCODE: DW_OP_eq
1861 // OPERANDS: none
1862 // DESCRIPTION: pops the top two stack values, compares using the
1863 // equals (==) operator.
1864 // STACK RESULT: push the constant value 1 onto the stack if the result
1865 // of the operation is true or the constant value 0 if the result of the
1866 // operation is false.
1867 //----------------------------------------------------------------------
1868 case DW_OP_eq:
1869 if (stack.size() < 2)
1870 {
1871 if (error_ptr)
1872 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
1873 return false;
1874 }
1875 else
1876 {
1877 tmp = stack.back();
1878 stack.pop_back();
1879 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
1880 }
1881 break;
1882
1883 //----------------------------------------------------------------------
1884 // OPCODE: DW_OP_ge
1885 // OPERANDS: none
1886 // DESCRIPTION: pops the top two stack values, compares using the
1887 // greater than or equal to (>=) operator.
1888 // STACK RESULT: push the constant value 1 onto the stack if the result
1889 // of the operation is true or the constant value 0 if the result of the
1890 // operation is false.
1891 //----------------------------------------------------------------------
1892 case DW_OP_ge:
1893 if (stack.size() < 2)
1894 {
1895 if (error_ptr)
1896 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
1897 return false;
1898 }
1899 else
1900 {
1901 tmp = stack.back();
1902 stack.pop_back();
1903 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
1904 }
1905 break;
1906
1907 //----------------------------------------------------------------------
1908 // OPCODE: DW_OP_gt
1909 // OPERANDS: none
1910 // DESCRIPTION: pops the top two stack values, compares using the
1911 // greater than (>) operator.
1912 // STACK RESULT: push the constant value 1 onto the stack if the result
1913 // of the operation is true or the constant value 0 if the result of the
1914 // operation is false.
1915 //----------------------------------------------------------------------
1916 case DW_OP_gt:
1917 if (stack.size() < 2)
1918 {
1919 if (error_ptr)
1920 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
1921 return false;
1922 }
1923 else
1924 {
1925 tmp = stack.back();
1926 stack.pop_back();
1927 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
1928 }
1929 break;
1930
1931 //----------------------------------------------------------------------
1932 // OPCODE: DW_OP_le
1933 // OPERANDS: none
1934 // DESCRIPTION: pops the top two stack values, compares using the
1935 // less than or equal to (<=) operator.
1936 // STACK RESULT: push the constant value 1 onto the stack if the result
1937 // of the operation is true or the constant value 0 if the result of the
1938 // operation is false.
1939 //----------------------------------------------------------------------
1940 case DW_OP_le:
1941 if (stack.size() < 2)
1942 {
1943 if (error_ptr)
1944 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
1945 return false;
1946 }
1947 else
1948 {
1949 tmp = stack.back();
1950 stack.pop_back();
1951 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
1952 }
1953 break;
1954
1955 //----------------------------------------------------------------------
1956 // OPCODE: DW_OP_lt
1957 // OPERANDS: none
1958 // DESCRIPTION: pops the top two stack values, compares using the
1959 // less than (<) operator.
1960 // STACK RESULT: push the constant value 1 onto the stack if the result
1961 // of the operation is true or the constant value 0 if the result of the
1962 // operation is false.
1963 //----------------------------------------------------------------------
1964 case DW_OP_lt:
1965 if (stack.size() < 2)
1966 {
1967 if (error_ptr)
1968 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
1969 return false;
1970 }
1971 else
1972 {
1973 tmp = stack.back();
1974 stack.pop_back();
1975 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
1976 }
1977 break;
1978
1979 //----------------------------------------------------------------------
1980 // OPCODE: DW_OP_ne
1981 // OPERANDS: none
1982 // DESCRIPTION: pops the top two stack values, compares using the
1983 // not equal (!=) operator.
1984 // STACK RESULT: push the constant value 1 onto the stack if the result
1985 // of the operation is true or the constant value 0 if the result of the
1986 // operation is false.
1987 //----------------------------------------------------------------------
1988 case DW_OP_ne:
1989 if (stack.size() < 2)
1990 {
1991 if (error_ptr)
1992 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
1993 return false;
1994 }
1995 else
1996 {
1997 tmp = stack.back();
1998 stack.pop_back();
1999 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
2000 }
2001 break;
2002
2003 //----------------------------------------------------------------------
2004 // OPCODE: DW_OP_litn
2005 // OPERANDS: none
2006 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2007 // STACK RESULT: push the unsigned literal constant value onto the top
2008 // of the stack.
2009 //----------------------------------------------------------------------
2010 case DW_OP_lit0:
2011 case DW_OP_lit1:
2012 case DW_OP_lit2:
2013 case DW_OP_lit3:
2014 case DW_OP_lit4:
2015 case DW_OP_lit5:
2016 case DW_OP_lit6:
2017 case DW_OP_lit7:
2018 case DW_OP_lit8:
2019 case DW_OP_lit9:
2020 case DW_OP_lit10:
2021 case DW_OP_lit11:
2022 case DW_OP_lit12:
2023 case DW_OP_lit13:
2024 case DW_OP_lit14:
2025 case DW_OP_lit15:
2026 case DW_OP_lit16:
2027 case DW_OP_lit17:
2028 case DW_OP_lit18:
2029 case DW_OP_lit19:
2030 case DW_OP_lit20:
2031 case DW_OP_lit21:
2032 case DW_OP_lit22:
2033 case DW_OP_lit23:
2034 case DW_OP_lit24:
2035 case DW_OP_lit25:
2036 case DW_OP_lit26:
2037 case DW_OP_lit27:
2038 case DW_OP_lit28:
2039 case DW_OP_lit29:
2040 case DW_OP_lit30:
2041 case DW_OP_lit31:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2042 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2043 break;
2044
2045 //----------------------------------------------------------------------
2046 // OPCODE: DW_OP_regN
2047 // OPERANDS: none
2048 // DESCRIPTION: Push the value in register n on the top of the stack.
2049 //----------------------------------------------------------------------
2050 case DW_OP_reg0:
2051 case DW_OP_reg1:
2052 case DW_OP_reg2:
2053 case DW_OP_reg3:
2054 case DW_OP_reg4:
2055 case DW_OP_reg5:
2056 case DW_OP_reg6:
2057 case DW_OP_reg7:
2058 case DW_OP_reg8:
2059 case DW_OP_reg9:
2060 case DW_OP_reg10:
2061 case DW_OP_reg11:
2062 case DW_OP_reg12:
2063 case DW_OP_reg13:
2064 case DW_OP_reg14:
2065 case DW_OP_reg15:
2066 case DW_OP_reg16:
2067 case DW_OP_reg17:
2068 case DW_OP_reg18:
2069 case DW_OP_reg19:
2070 case DW_OP_reg20:
2071 case DW_OP_reg21:
2072 case DW_OP_reg22:
2073 case DW_OP_reg23:
2074 case DW_OP_reg24:
2075 case DW_OP_reg25:
2076 case DW_OP_reg26:
2077 case DW_OP_reg27:
2078 case DW_OP_reg28:
2079 case DW_OP_reg29:
2080 case DW_OP_reg30:
2081 case DW_OP_reg31:
2082 {
2083 reg_num = op - DW_OP_reg0;
2084
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2085 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2086 stack.push_back(tmp);
2087 else
2088 return false;
2089 }
2090 break;
2091 //----------------------------------------------------------------------
2092 // OPCODE: DW_OP_regx
2093 // OPERANDS:
2094 // ULEB128 literal operand that encodes the register.
2095 // DESCRIPTION: Push the value in register on the top of the stack.
2096 //----------------------------------------------------------------------
2097 case DW_OP_regx:
2098 {
2099 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2100 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2101 stack.push_back(tmp);
2102 else
2103 return false;
2104 }
2105 break;
2106
2107 //----------------------------------------------------------------------
2108 // OPCODE: DW_OP_bregN
2109 // OPERANDS:
2110 // SLEB128 offset from register N
2111 // DESCRIPTION: Value is in memory at the address specified by register
2112 // N plus an offset.
2113 //----------------------------------------------------------------------
2114 case DW_OP_breg0:
2115 case DW_OP_breg1:
2116 case DW_OP_breg2:
2117 case DW_OP_breg3:
2118 case DW_OP_breg4:
2119 case DW_OP_breg5:
2120 case DW_OP_breg6:
2121 case DW_OP_breg7:
2122 case DW_OP_breg8:
2123 case DW_OP_breg9:
2124 case DW_OP_breg10:
2125 case DW_OP_breg11:
2126 case DW_OP_breg12:
2127 case DW_OP_breg13:
2128 case DW_OP_breg14:
2129 case DW_OP_breg15:
2130 case DW_OP_breg16:
2131 case DW_OP_breg17:
2132 case DW_OP_breg18:
2133 case DW_OP_breg19:
2134 case DW_OP_breg20:
2135 case DW_OP_breg21:
2136 case DW_OP_breg22:
2137 case DW_OP_breg23:
2138 case DW_OP_breg24:
2139 case DW_OP_breg25:
2140 case DW_OP_breg26:
2141 case DW_OP_breg27:
2142 case DW_OP_breg28:
2143 case DW_OP_breg29:
2144 case DW_OP_breg30:
2145 case DW_OP_breg31:
2146 {
2147 reg_num = op - DW_OP_breg0;
2148
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2149 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2150 {
2151 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2152 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2153 stack.push_back(tmp);
2154 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2155 }
2156 else
2157 return false;
2158 }
2159 break;
2160 //----------------------------------------------------------------------
2161 // OPCODE: DW_OP_bregx
2162 // OPERANDS: 2
2163 // ULEB128 literal operand that encodes the register.
2164 // SLEB128 offset from register N
2165 // DESCRIPTION: Value is in memory at the address specified by register
2166 // N plus an offset.
2167 //----------------------------------------------------------------------
2168 case DW_OP_bregx:
2169 {
2170 reg_num = opcodes.GetULEB128(&offset);
2171
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2172 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2173 {
2174 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2175 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2176 stack.push_back(tmp);
2177 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2178 }
2179 else
2180 return false;
2181 }
2182 break;
2183
2184 case DW_OP_fbreg:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2185 if (exe_ctx)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2186 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2187 if (frame)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2188 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2189 Scalar value;
2190 if (frame->GetFrameBaseValue(value, error_ptr))
2191 {
2192 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2193 value += fbreg_offset;
2194 stack.push_back(value);
2195 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2196 }
2197 else
2198 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2199 }
2200 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2201 {
2202 if (error_ptr)
2203 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2204 return false;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2205 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2206 }
2207 else
2208 {
2209 if (error_ptr)
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2210 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2211 return false;
2212 }
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2213
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2214 break;
2215
2216 //----------------------------------------------------------------------
2217 // OPCODE: DW_OP_nop
2218 // OPERANDS: none
2219 // DESCRIPTION: A place holder. It has no effect on the location stack
2220 // or any of its values.
2221 //----------------------------------------------------------------------
2222 case DW_OP_nop:
2223 break;
2224
2225 //----------------------------------------------------------------------
2226 // OPCODE: DW_OP_piece
2227 // OPERANDS: 1
2228 // ULEB128: byte size of the piece
2229 // DESCRIPTION: The operand describes the size in bytes of the piece of
2230 // the object referenced by the DWARF expression whose result is at the
2231 // top of the stack. If the piece is located in a register, but does not
2232 // occupy the entire register, the placement of the piece within that
2233 // register is defined by the ABI.
2234 //
2235 // Many compilers store a single variable in sets of registers, or store
2236 // a variable partially in memory and partially in registers.
2237 // DW_OP_piece provides a way of describing how large a part of a
2238 // variable a particular DWARF expression refers to.
2239 //----------------------------------------------------------------------
2240 case DW_OP_piece:
2241 if (error_ptr)
2242 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2243 return false;
2244
2245 //----------------------------------------------------------------------
2246 // OPCODE: DW_OP_push_object_address
2247 // OPERANDS: none
2248 // DESCRIPTION: Pushes the address of the object currently being
2249 // evaluated as part of evaluation of a user presented expression.
2250 // This object may correspond to an independent variable described by
2251 // its own DIE or it may be a component of an array, structure, or class
2252 // whose address has been dynamically determined by an earlier step
2253 // during user expression evaluation.
2254 //----------------------------------------------------------------------
2255 case DW_OP_push_object_address:
2256 if (error_ptr)
2257 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2258 return false;
2259
2260 //----------------------------------------------------------------------
2261 // OPCODE: DW_OP_call2
2262 // OPERANDS:
2263 // uint16_t compile unit relative offset of a DIE
2264 // DESCRIPTION: Performs subroutine calls during evaluation
2265 // of a DWARF expression. The operand is the 2-byte unsigned offset
2266 // of a debugging information entry in the current compilation unit.
2267 //
2268 // Operand interpretation is exactly like that for DW_FORM_ref2.
2269 //
2270 // This operation transfers control of DWARF expression evaluation
2271 // to the DW_AT_location attribute of the referenced DIE. If there is
2272 // no such attribute, then there is no effect. Execution of the DWARF
2273 // expression of a DW_AT_location attribute may add to and/or remove from
2274 // values on the stack. Execution returns to the point following the call
2275 // when the end of the attribute is reached. Values on the stack at the
2276 // time of the call may be used as parameters by the called expression
2277 // and values left on the stack by the called expression may be used as
2278 // return values by prior agreement between the calling and called
2279 // expressions.
2280 //----------------------------------------------------------------------
2281 case DW_OP_call2:
2282 if (error_ptr)
2283 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2284 return false;
2285 //----------------------------------------------------------------------
2286 // OPCODE: DW_OP_call4
2287 // OPERANDS: 1
2288 // uint32_t compile unit relative offset of a DIE
2289 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2290 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2291 // of a debugging information entry in the current compilation unit.
2292 //
2293 // Operand interpretation DW_OP_call4 is exactly like that for
2294 // DW_FORM_ref4.
2295 //
2296 // This operation transfers control of DWARF expression evaluation
2297 // to the DW_AT_location attribute of the referenced DIE. If there is
2298 // no such attribute, then there is no effect. Execution of the DWARF
2299 // expression of a DW_AT_location attribute may add to and/or remove from
2300 // values on the stack. Execution returns to the point following the call
2301 // when the end of the attribute is reached. Values on the stack at the
2302 // time of the call may be used as parameters by the called expression
2303 // and values left on the stack by the called expression may be used as
2304 // return values by prior agreement between the calling and called
2305 // expressions.
2306 //----------------------------------------------------------------------
2307 case DW_OP_call4:
2308 if (error_ptr)
2309 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2310 return false;
2311
2312
2313 //----------------------------------------------------------------------
2314 // OPCODE: DW_OP_call_ref
2315 // OPERANDS:
2316 // uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
2317 // absolute DIE offset for 64 bit DWARF.
2318 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2319 // expression. Takes a single operand. In the 32-bit DWARF format, the
2320 // operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
2321 // is an 8-byte unsigned value. The operand is used as the offset of a
2322 // debugging information entry in a .debug_info section which may be
2323 // contained in a shared object for executable other than that
2324 // containing the operator. For references from one shared object or
2325 // executable to another, the relocation must be performed by the
2326 // consumer.
2327 //
2328 // Operand interpretation of DW_OP_call_ref is exactly like that for
2329 // DW_FORM_ref_addr.
2330 //
2331 // This operation transfers control of DWARF expression evaluation
2332 // to the DW_AT_location attribute of the referenced DIE. If there is
2333 // no such attribute, then there is no effect. Execution of the DWARF
2334 // expression of a DW_AT_location attribute may add to and/or remove from
2335 // values on the stack. Execution returns to the point following the call
2336 // when the end of the attribute is reached. Values on the stack at the
2337 // time of the call may be used as parameters by the called expression
2338 // and values left on the stack by the called expression may be used as
2339 // return values by prior agreement between the calling and called
2340 // expressions.
2341 //----------------------------------------------------------------------
2342 case DW_OP_call_ref:
2343 if (error_ptr)
2344 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
2345 return false;
2346
2347 //----------------------------------------------------------------------
2348 // OPCODE: DW_OP_APPLE_array_ref
2349 // OPERANDS: none
2350 // DESCRIPTION: Pops a value off the stack and uses it as the array
2351 // index. Pops a second value off the stack and uses it as the array
2352 // itself. Pushes a value onto the stack representing the element of
2353 // the array specified by the index.
2354 //----------------------------------------------------------------------
2355 case DW_OP_APPLE_array_ref:
2356 {
2357 if (stack.size() < 2)
2358 {
2359 if (error_ptr)
2360 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
2361 return false;
2362 }
2363
2364 Value index_val = stack.back();
2365 stack.pop_back();
2366 Value array_val = stack.back();
2367 stack.pop_back();
2368
2369 Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2370 int64_t index = index_scalar.SLongLong(LLONG_MAX);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2371
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2372 if (index == LLONG_MAX)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2373 {
2374 if (error_ptr)
2375 error_ptr->SetErrorString("Invalid array index.");
2376 return false;
2377 }
2378
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2379 if (array_val.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2380 {
2381 if (error_ptr)
2382 error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
2383 return false;
2384 }
2385
2386 if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
2387 array_val.GetValueType() != Value::eValueTypeHostAddress)
2388 {
2389 if (error_ptr)
2390 error_ptr->SetErrorString("Array must be stored in memory.");
2391 return false;
2392 }
2393
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2394 void *array_type = array_val.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2395
2396 void *member_type;
2397 uint64_t size = 0;
2398
2399 if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
2400 (!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
2401 {
2402 if (error_ptr)
2403 error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
2404 return false;
2405 }
2406
2407 if (size && (index >= size || index < 0))
2408 {
2409 if (error_ptr)
2410 error_ptr->SetErrorStringWithFormat("Out of bounds array access. %lld is not in [0, %llu]", index, size);
2411 return false;
2412 }
2413
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2414 uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
2415 uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2416 uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
2417 if (member_bit_incr % 8)
2418 {
2419 if (error_ptr)
Jason Molenda95b7b432011-09-20 00:26:08 +0000[diff] [blame]2420 error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2421 return false;
2422 }
2423 int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
2424
2425 Value member;
2426
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2427 member.SetContext(Value::eContextTypeClangType, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2428 member.SetValueType(array_val.GetValueType());
2429
2430 addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
2431 addr_t member_loc = array_base + member_offset;
2432 member.GetScalar() = (uint64_t)member_loc;
2433
2434 stack.push_back(member);
2435 }
2436 break;
2437
2438 //----------------------------------------------------------------------
2439 // OPCODE: DW_OP_APPLE_uninit
2440 // OPERANDS: none
2441 // DESCRIPTION: Lets us know that the value is currently not initialized
2442 //----------------------------------------------------------------------
2443 case DW_OP_APPLE_uninit:
2444 //return eResultTypeErrorUninitialized;
2445 break; // Ignore this as we have seen cases where this value is incorrectly added
2446
2447 //----------------------------------------------------------------------
2448 // OPCODE: DW_OP_APPLE_assign
2449 // OPERANDS: none
2450 // DESCRIPTION: Pops a value off of the stack and assigns it to the next
2451 // item on the stack which must be something assignable (inferior
2452 // Variable, inferior Type with address, inferior register, or
2453 // expression local variable.
2454 //----------------------------------------------------------------------
2455 case DW_OP_APPLE_assign:
2456 if (stack.size() < 2)
2457 {
2458 if (error_ptr)
2459 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
2460 return false;
2461 }
2462 else
2463 {
2464 tmp = stack.back();
2465 stack.pop_back();
2466 Value::ContextType context_type = stack.back().GetContextType();
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]2467 StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2468 switch (context_type)
2469 {
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2470 case Value::eContextTypeClangType:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2471 {
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2472 void *clang_type = stack.back().GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2473
2474 if (ClangASTContext::IsAggregateType (clang_type))
2475 {
2476 Value::ValueType source_value_type = tmp.GetValueType();
2477 Value::ValueType target_value_type = stack.back().GetValueType();
2478
2479 addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
2480 addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
2481
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2482 size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2483
2484 switch (source_value_type)
2485 {
Greg Clayton4fdf7602011-03-20 04:57:14 +0000[diff] [blame]2486 case Value::eValueTypeScalar:
2487 case Value::eValueTypeFileAddress:
2488 break;
2489
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2490 case Value::eValueTypeLoadAddress:
2491 switch (target_value_type)
2492 {
2493 case Value::eValueTypeLoadAddress:
2494 {
2495 DataBufferHeap data;
2496 data.SetByteSize(byte_size);
2497
2498 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2499 if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2500 {
2501 if (error_ptr)
2502 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2503 return false;
2504 }
2505
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2506 if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2507 {
2508 if (error_ptr)
2509 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2510 return false;
2511 }
2512 }
2513 break;
2514 case Value::eValueTypeHostAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2515 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2516 {
2517 if (error_ptr)
2518 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2519 return false;
2520 }
2521 else
2522 {
2523 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2524 if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2525 {
2526 if (error_ptr)
2527 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2528 return false;
2529 }
2530 }
2531 break;
2532 default:
2533 return false;
2534 }
2535 break;
2536 case Value::eValueTypeHostAddress:
2537 switch (target_value_type)
2538 {
2539 case Value::eValueTypeLoadAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2540 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2541 {
2542 if (error_ptr)
2543 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2544 return false;
2545 }
2546 else
2547 {
2548 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2549 if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2550 {
2551 if (error_ptr)
2552 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2553 return false;
2554 }
2555 }
2556 case Value::eValueTypeHostAddress:
2557 memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
2558 break;
2559 default:
2560 return false;
2561 }
2562 }
2563 }
2564 else
2565 {
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2566 if (!ClangASTType::SetValueFromScalar (ast_context,
2567 clang_type,
2568 tmp.ResolveValue(exe_ctx, ast_context),
2569 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2570 {
2571 if (error_ptr)
2572 error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
2573 return false;
2574 }
2575
2576 Value::ValueType value_type = stack.back().GetValueType();
2577
2578 switch (value_type)
2579 {
2580 case Value::eValueTypeLoadAddress:
2581 case Value::eValueTypeHostAddress:
2582 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]2583 AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2584 lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2585 if (!ClangASTType::WriteToMemory (ast_context,
2586 clang_type,
2587 exe_ctx,
2588 addr,
2589 address_type,
2590 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2591 {
2592 if (error_ptr)
2593 error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%llx.\n", addr);
2594 return false;
2595 }
2596 }
2597 break;
2598
2599 default:
2600 break;
2601 }
2602 }
2603 }
2604 break;
2605
2606 default:
2607 if (error_ptr)
2608 error_ptr->SetErrorString ("Assign failed.");
2609 return false;
2610 }
2611 }
2612 break;
2613
2614 //----------------------------------------------------------------------
2615 // OPCODE: DW_OP_APPLE_address_of
2616 // OPERANDS: none
2617 // DESCRIPTION: Pops a value off of the stack and pushed its address.
2618 // The top item on the stack must be a variable, or already be a memory
2619 // location.
2620 //----------------------------------------------------------------------
2621 case DW_OP_APPLE_address_of:
2622 if (stack.empty())
2623 {
2624 if (error_ptr)
2625 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
2626 return false;
2627 }
2628 else
2629 {
2630 Value::ValueType value_type = stack.back().GetValueType();
2631 switch (value_type)
2632 {
2633 default:
2634 case Value::eValueTypeScalar: // raw scalar value
2635 if (error_ptr)
2636 error_ptr->SetErrorString("Top stack item isn't a memory based object.");
2637 return false;
2638
2639 case Value::eValueTypeLoadAddress: // load address value
2640 case Value::eValueTypeFileAddress: // file address value
2641 case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
2642 // Taking the address of an object reduces it to the address
2643 // of the value and removes any extra context it had.
2644 //stack.back().SetValueType(Value::eValueTypeScalar);
2645 stack.back().ClearContext();
2646 break;
2647 }
2648 }
2649 break;
2650
2651 //----------------------------------------------------------------------
2652 // OPCODE: DW_OP_APPLE_value_of
2653 // OPERANDS: none
2654 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2655 // The top item on the stack must be a variable, expression variable.
2656 //----------------------------------------------------------------------
2657 case DW_OP_APPLE_value_of:
2658 if (stack.empty())
2659 {
2660 if (error_ptr)
2661 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
2662 return false;
2663 }
2664 else if (!stack.back().ValueOf(exe_ctx, ast_context))
2665 {
2666 if (error_ptr)
2667 error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
2668 return false;
2669 }
2670 break;
2671
2672 //----------------------------------------------------------------------
2673 // OPCODE: DW_OP_APPLE_deref_type
2674 // OPERANDS: none
2675 // DESCRIPTION: gets the value pointed to by the top stack item
2676 //----------------------------------------------------------------------
2677 case DW_OP_APPLE_deref_type:
2678 {
2679 if (stack.empty())
2680 {
2681 if (error_ptr)
2682 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
2683 return false;
2684 }
2685
2686 tmp = stack.back();
2687 stack.pop_back();
2688
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2689 if (tmp.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2690 {
2691 if (error_ptr)
2692 error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
2693 return false;
2694 }
2695
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2696 void *ptr_type = tmp.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2697 void *target_type;
2698
2699 if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
2700 {
2701 if (error_ptr)
2702 error_ptr->SetErrorString("Dereferencing a non-pointer type");
2703 return false;
2704 }
2705
2706 // TODO do we want all pointers to be dereferenced as load addresses?
2707 Value::ValueType value_type = tmp.GetValueType();
2708
2709 tmp.ResolveValue(exe_ctx, ast_context);
2710
2711 tmp.SetValueType(value_type);
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2712 tmp.SetContext(Value::eContextTypeClangType, target_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2713
2714 stack.push_back(tmp);
2715 }
2716 break;
2717
2718 //----------------------------------------------------------------------
2719 // OPCODE: DW_OP_APPLE_expr_local
2720 // OPERANDS: ULEB128
2721 // DESCRIPTION: pushes the expression local variable index onto the
2722 // stack and set the appropriate context so we know the stack item is
2723 // an expression local variable index.
2724 //----------------------------------------------------------------------
2725 case DW_OP_APPLE_expr_local:
2726 {
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]2727 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2728 uint32_t idx = opcodes.GetULEB128(&offset);
2729 if (expr_locals == NULL)
2730 {
2731 if (error_ptr)
2732 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
2733 return false;
2734 }
2735 Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
2736 if (expr_local_variable == NULL)
2737 {
2738 if (error_ptr)
2739 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
2740 return false;
2741 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2742 // The proxy code has been removed. If it is ever re-added, please
2743 // use shared pointers or return by value to avoid possible memory
2744 // leak (there is no leak here, but in general, no returning pointers
2745 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2746 Value *proxy = expr_local_variable->CreateProxy();
2747 stack.push_back(*proxy);
2748 delete proxy;
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2749 //stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]2750 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2751 }
2752 break;
2753
2754 //----------------------------------------------------------------------
2755 // OPCODE: DW_OP_APPLE_extern
2756 // OPERANDS: ULEB128
2757 // DESCRIPTION: pushes a proxy for the extern object index onto the
2758 // stack.
2759 //----------------------------------------------------------------------
2760 case DW_OP_APPLE_extern:
2761 {
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]2762 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2763 uint32_t idx = opcodes.GetULEB128(&offset);
2764 if (!decl_map)
2765 {
2766 if (error_ptr)
2767 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
2768 return false;
2769 }
2770 Value *extern_var = decl_map->GetValueForIndex(idx);
2771 if (!extern_var)
2772 {
2773 if (error_ptr)
2774 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
2775 return false;
2776 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2777 // The proxy code has been removed. If it is ever re-added, please
2778 // use shared pointers or return by value to avoid possible memory
2779 // leak (there is no leak here, but in general, no returning pointers
2780 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2781 Value *proxy = extern_var->CreateProxy();
2782 stack.push_back(*proxy);
2783 delete proxy;
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]2784 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2785 }
2786 break;
2787
2788 case DW_OP_APPLE_scalar_cast:
2789 if (stack.empty())
2790 {
2791 if (error_ptr)
2792 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
2793 return false;
2794 }
2795 else
2796 {
2797 // Simple scalar cast
2798 if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
2799 {
2800 if (error_ptr)
2801 error_ptr->SetErrorString("Cast failed.");
2802 return false;
2803 }
2804 }
2805 break;
2806
2807
2808 case DW_OP_APPLE_clang_cast:
2809 if (stack.empty())
2810 {
2811 if (error_ptr)
2812 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
2813 return false;
2814 }
2815 else
2816 {
2817 void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2818 stack.back().SetContext (Value::eContextTypeClangType, clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2819 }
2820 break;
2821 //----------------------------------------------------------------------
2822 // OPCODE: DW_OP_APPLE_constf
2823 // OPERANDS: 1 byte float length, followed by that many bytes containing
2824 // the constant float data.
2825 // DESCRIPTION: Push a float value onto the expression stack.
2826 //----------------------------------------------------------------------
2827 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
2828 {
2829 uint8_t float_length = opcodes.GetU8(&offset);
2830 if (sizeof(float) == float_length)
2831 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
2832 else if (sizeof(double) == float_length)
2833 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
2834 else if (sizeof(long double) == float_length)
2835 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
2836 else
2837 {
2838 StreamString new_value;
2839 opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
2840
2841 if (error_ptr)
2842 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
2843 return false;
2844 }
2845 tmp.SetValueType(Value::eValueTypeScalar);
2846 tmp.ClearContext();
2847 stack.push_back(tmp);
2848 }
2849 break;
2850 //----------------------------------------------------------------------
2851 // OPCODE: DW_OP_APPLE_clear
2852 // OPERANDS: none
2853 // DESCRIPTION: Clears the expression stack.
2854 //----------------------------------------------------------------------
2855 case DW_OP_APPLE_clear:
2856 stack.clear();
2857 break;
2858
2859 //----------------------------------------------------------------------
2860 // OPCODE: DW_OP_APPLE_error
2861 // OPERANDS: none
2862 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2863 // The top item on the stack must be a variable, expression variable.
2864 //----------------------------------------------------------------------
2865 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
2866 if (error_ptr)
2867 error_ptr->SetErrorString ("Generic error.");
2868 return false;
2869 }
2870 }
2871
2872 if (stack.empty())
2873 {
2874 if (error_ptr)
2875 error_ptr->SetErrorString ("Stack empty after evaluation.");
2876 return false;
2877 }
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]2878 else if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2879 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2880 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]2881 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2882 for (size_t i=0; i<count; ++i)
2883 {
2884 StreamString new_value;
2885 new_value.Printf("[%zu]", i);
2886 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]2887 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2888 }
2889 }
2890
2891 result = stack.back();
2892 return true; // Return true on success
2893}
2894