1 //===-- sanitizer_symbolizer_mac.cc ---------------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file is shared between various sanitizers' runtime libraries.
11 // Implementation of Mac-specific "atos" symbolizer.
12 //===----------------------------------------------------------------------===//
14 #include "sanitizer_platform.h"
17 #include "sanitizer_allocator_internal.h"
18 #include "sanitizer_mac.h"
19 #include "sanitizer_symbolizer_mac.h"
28 namespace __sanitizer {
30 bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
32 int result = dladdr((const void *)addr, &info);
33 if (!result) return false;
34 const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
35 if (!demangled) return false;
36 stack->info.function = internal_strdup(demangled);
40 bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) {
42 int result = dladdr((const void *)addr, &info);
43 if (!result) return false;
44 const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
45 datainfo->name = internal_strdup(demangled);
46 datainfo->start = (uptr)info.dli_saddr;
50 class AtosSymbolizerProcess : public SymbolizerProcess {
52 explicit AtosSymbolizerProcess(const char *path, pid_t parent_pid)
53 : SymbolizerProcess(path, /*use_forkpty*/ true) {
54 // Put the string command line argument in the object so that it outlives
55 // the call to GetArgV.
56 internal_snprintf(pid_str_, sizeof(pid_str_), "%d", parent_pid);
60 bool ReachedEndOfOutput(const char *buffer, uptr length) const override {
61 return (length >= 1 && buffer[length - 1] == '\n');
64 void GetArgV(const char *path_to_binary,
65 const char *(&argv)[kArgVMax]) const override {
67 argv[i++] = path_to_binary;
69 argv[i++] = &pid_str_[0];
70 if (GetMacosVersion() == MACOS_VERSION_MAVERICKS) {
71 // On Mavericks atos prints a deprecation warning which we suppress by
72 // passing -d. The warning isn't present on other OSX versions, even the
82 static bool ParseCommandOutput(const char *str, uptr addr, char **out_name,
83 char **out_module, char **out_file, uptr *line,
84 uptr *start_address) {
85 // Trim ending newlines.
87 ExtractTokenUpToDelimiter(str, "\n", &trim);
89 // The line from `atos` is in one of these formats:
90 // myfunction (in library.dylib) (sourcefile.c:17)
91 // myfunction (in library.dylib) + 0x1fe
92 // myfunction (in library.dylib) + 15
93 // 0xdeadbeef (in library.dylib) + 0x1fe
94 // 0xdeadbeef (in library.dylib) + 15
95 // 0xdeadbeef (in library.dylib)
98 const char *rest = trim;
100 rest = ExtractTokenUpToDelimiter(rest, " (in ", &symbol_name);
101 if (rest[0] == '\0') {
102 InternalFree(symbol_name);
107 if (internal_strncmp(symbol_name, "0x", 2) != 0)
108 *out_name = symbol_name;
110 InternalFree(symbol_name);
111 rest = ExtractTokenUpToDelimiter(rest, ") ", out_module);
113 if (rest[0] == '(') {
116 rest = ExtractTokenUpToDelimiter(rest, ":", out_file);
117 char *extracted_line_number;
118 rest = ExtractTokenUpToDelimiter(rest, ")", &extracted_line_number);
119 if (line) *line = (uptr)internal_atoll(extracted_line_number);
120 InternalFree(extracted_line_number);
122 } else if (rest[0] == '+') {
124 uptr offset = internal_atoll(rest);
125 if (start_address) *start_address = addr - offset;
132 AtosSymbolizer::AtosSymbolizer(const char *path, LowLevelAllocator *allocator)
133 : process_(new(*allocator) AtosSymbolizerProcess(path, getpid())) {}
135 bool AtosSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
136 if (!process_) return false;
137 if (addr == 0) return false;
139 internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
140 const char *buf = process_->SendCommand(command);
141 if (!buf) return false;
143 if (!ParseCommandOutput(buf, addr, &stack->info.function, &stack->info.module,
144 &stack->info.file, &line, nullptr)) {
148 stack->info.line = (int)line;
152 bool AtosSymbolizer::SymbolizeData(uptr addr, DataInfo *info) {
153 if (!process_) return false;
155 internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
156 const char *buf = process_->SendCommand(command);
157 if (!buf) return false;
158 if (!ParseCommandOutput(buf, addr, &info->name, &info->module, nullptr,
159 nullptr, &info->start)) {
166 } // namespace __sanitizer
168 #endif // SANITIZER_MAC