1// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2// for details. All rights reserved. Use of this source code is governed by a
3// BSD-style license that can be found in the LICENSE file.
4
5#include "vm/globals.h"
6#if defined(HOST_OS_WINDOWS)
7
8#include "vm/lockers.h"
9#include "vm/native_symbol.h"
10#include "vm/os.h"
11#include "vm/os_thread.h"
12
13#include <dbghelp.h> // NOLINT
14
15namespace dart {
16
17static bool running_ = false;
18static Mutex* lock_ = NULL;
19
20void NativeSymbolResolver::Init() {
21 ASSERT(running_ == false);
22 if (lock_ == NULL) {
23 lock_ = new Mutex();
24 }
25 running_ = true;
26 SymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);
27 HANDLE hProcess = GetCurrentProcess();
28 if (!SymInitialize(hProcess, NULL, TRUE)) {
29 DWORD error = GetLastError();
30 OS::PrintErr("Failed to init NativeSymbolResolver (SymInitialize %" Pu32
31 ")\n",
32 error);
33 return;
34 }
35}
36
37void NativeSymbolResolver::Cleanup() {
38 MutexLocker lock(lock_);
39 if (!running_) {
40 return;
41 }
42 running_ = false;
43 HANDLE hProcess = GetCurrentProcess();
44 if (!SymCleanup(hProcess)) {
45 DWORD error = GetLastError();
46 OS::PrintErr("Failed to shutdown NativeSymbolResolver (SymCleanup %" Pu32
47 ")\n",
48 error);
49 }
50}
51
52char* NativeSymbolResolver::LookupSymbolName(uword pc, uword* start) {
53 static const intptr_t kMaxNameLength = 2048;
54 static const intptr_t kSymbolInfoSize = sizeof(SYMBOL_INFO); // NOLINT.
55 static char buffer[kSymbolInfoSize + kMaxNameLength];
56 static char name_buffer[kMaxNameLength];
57 MutexLocker lock(lock_);
58 if (!running_) {
59 return NULL;
60 }
61 if (start != NULL) {
62 *start = NULL;
63 }
64 memset(&buffer[0], 0, sizeof(buffer));
65 HANDLE hProcess = GetCurrentProcess();
66 DWORD64 address = static_cast<DWORD64>(pc);
67 PSYMBOL_INFO pSymbol = reinterpret_cast<PSYMBOL_INFO>(&buffer[0]);
68 pSymbol->SizeOfStruct = kSymbolInfoSize;
69 pSymbol->MaxNameLen = kMaxNameLength;
70 DWORD64 displacement;
71 BOOL r = SymFromAddr(hProcess, address, &displacement, pSymbol);
72 if (r == FALSE) {
73 return NULL;
74 }
75 if (start != NULL) {
76 *start = pc - displacement;
77 }
78 return Utils::StrDup(pSymbol->Name);
79}
80
81void NativeSymbolResolver::FreeSymbolName(char* name) {
82 free(name);
83}
84
85bool NativeSymbolResolver::LookupSharedObject(uword pc,
86 uword* dso_base,
87 char** dso_name) {
88 return false;
89}
90
91void NativeSymbolResolver::AddSymbols(const char* dso_name,
92 void* buffer,
93 size_t size) {
94 OS::PrintErr("warning: Dart_AddSymbols has no effect on Windows\n");
95}
96
97} // namespace dart
98
99#endif // defined(HOST_OS_WINDOWS)
100