]>
Commit | Line | Data |
---|---|---|
696d846a MO |
1 | //===-- sanitizer_symbolizer_mac.cc ---------------------------------------===// |
2 | // | |
3 | // This file is distributed under the University of Illinois Open Source | |
4 | // License. See LICENSE.TXT for details. | |
5 | // | |
6 | //===----------------------------------------------------------------------===// | |
7 | // | |
8 | // This file is shared between various sanitizers' runtime libraries. | |
9 | // | |
10 | // Implementation of Mac-specific "atos" symbolizer. | |
11 | //===----------------------------------------------------------------------===// | |
12 | ||
13 | #include "sanitizer_platform.h" | |
14 | #if SANITIZER_MAC | |
15 | ||
16 | #include "sanitizer_allocator_internal.h" | |
17 | #include "sanitizer_mac.h" | |
18 | #include "sanitizer_symbolizer_mac.h" | |
19 | ||
696d846a MO |
20 | #include <dlfcn.h> |
21 | #include <errno.h> | |
22 | #include <stdlib.h> | |
23 | #include <sys/wait.h> | |
24 | #include <unistd.h> | |
25 | #include <util.h> | |
26 | ||
10189819 MO |
27 | namespace __sanitizer { |
28 | ||
696d846a MO |
29 | bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) { |
30 | Dl_info info; | |
31 | int result = dladdr((const void *)addr, &info); | |
32 | if (!result) return false; | |
10189819 MO |
33 | const char *demangled = DemangleSwiftAndCXX(info.dli_sname); |
34 | if (!demangled) return false; | |
696d846a MO |
35 | stack->info.function = internal_strdup(demangled); |
36 | return true; | |
37 | } | |
38 | ||
55aea9f5 MO |
39 | bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) { |
40 | Dl_info info; | |
41 | int result = dladdr((const void *)addr, &info); | |
42 | if (!result) return false; | |
10189819 | 43 | const char *demangled = DemangleSwiftAndCXX(info.dli_sname); |
55aea9f5 MO |
44 | datainfo->name = internal_strdup(demangled); |
45 | datainfo->start = (uptr)info.dli_saddr; | |
46 | return true; | |
696d846a MO |
47 | } |
48 | ||
49 | class AtosSymbolizerProcess : public SymbolizerProcess { | |
50 | public: | |
51 | explicit AtosSymbolizerProcess(const char *path, pid_t parent_pid) | |
52 | : SymbolizerProcess(path, /*use_forkpty*/ true) { | |
53 | // Put the string command line argument in the object so that it outlives | |
54 | // the call to GetArgV. | |
55 | internal_snprintf(pid_str_, sizeof(pid_str_), "%d", parent_pid); | |
56 | } | |
57 | ||
58 | private: | |
59 | bool ReachedEndOfOutput(const char *buffer, uptr length) const override { | |
60 | return (length >= 1 && buffer[length - 1] == '\n'); | |
61 | } | |
62 | ||
63 | void GetArgV(const char *path_to_binary, | |
64 | const char *(&argv)[kArgVMax]) const override { | |
65 | int i = 0; | |
66 | argv[i++] = path_to_binary; | |
67 | argv[i++] = "-p"; | |
68 | argv[i++] = &pid_str_[0]; | |
69 | if (GetMacosVersion() == MACOS_VERSION_MAVERICKS) { | |
70 | // On Mavericks atos prints a deprecation warning which we suppress by | |
71 | // passing -d. The warning isn't present on other OSX versions, even the | |
72 | // newer ones. | |
73 | argv[i++] = "-d"; | |
74 | } | |
75 | argv[i++] = nullptr; | |
76 | } | |
77 | ||
78 | char pid_str_[16]; | |
79 | }; | |
80 | ||
55aea9f5 MO |
81 | static bool ParseCommandOutput(const char *str, uptr addr, char **out_name, |
82 | char **out_module, char **out_file, uptr *line, | |
83 | uptr *start_address) { | |
696d846a MO |
84 | // Trim ending newlines. |
85 | char *trim; | |
86 | ExtractTokenUpToDelimiter(str, "\n", &trim); | |
87 | ||
88 | // The line from `atos` is in one of these formats: | |
89 | // myfunction (in library.dylib) (sourcefile.c:17) | |
90 | // myfunction (in library.dylib) + 0x1fe | |
55aea9f5 | 91 | // myfunction (in library.dylib) + 15 |
696d846a | 92 | // 0xdeadbeef (in library.dylib) + 0x1fe |
55aea9f5 | 93 | // 0xdeadbeef (in library.dylib) + 15 |
696d846a MO |
94 | // 0xdeadbeef (in library.dylib) |
95 | // 0xdeadbeef | |
96 | ||
10189819 MO |
97 | const char *rest = trim; |
98 | char *symbol_name; | |
99 | rest = ExtractTokenUpToDelimiter(rest, " (in ", &symbol_name); | |
100 | if (rest[0] == '\0') { | |
101 | InternalFree(symbol_name); | |
696d846a MO |
102 | InternalFree(trim); |
103 | return false; | |
104 | } | |
105 | ||
55aea9f5 MO |
106 | if (internal_strncmp(symbol_name, "0x", 2) != 0) |
107 | *out_name = symbol_name; | |
696d846a | 108 | else |
55aea9f5 MO |
109 | InternalFree(symbol_name); |
110 | rest = ExtractTokenUpToDelimiter(rest, ") ", out_module); | |
696d846a MO |
111 | |
112 | if (rest[0] == '(') { | |
55aea9f5 MO |
113 | if (out_file) { |
114 | rest++; | |
115 | rest = ExtractTokenUpToDelimiter(rest, ":", out_file); | |
116 | char *extracted_line_number; | |
117 | rest = ExtractTokenUpToDelimiter(rest, ")", &extracted_line_number); | |
118 | if (line) *line = (uptr)internal_atoll(extracted_line_number); | |
119 | InternalFree(extracted_line_number); | |
120 | } | |
121 | } else if (rest[0] == '+') { | |
122 | rest += 2; | |
123 | uptr offset = internal_atoll(rest); | |
124 | if (start_address) *start_address = addr - offset; | |
696d846a MO |
125 | } |
126 | ||
127 | InternalFree(trim); | |
128 | return true; | |
129 | } | |
130 | ||
131 | AtosSymbolizer::AtosSymbolizer(const char *path, LowLevelAllocator *allocator) | |
132 | : process_(new(*allocator) AtosSymbolizerProcess(path, getpid())) {} | |
133 | ||
134 | bool AtosSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) { | |
135 | if (!process_) return false; | |
10189819 | 136 | if (addr == 0) return false; |
696d846a MO |
137 | char command[32]; |
138 | internal_snprintf(command, sizeof(command), "0x%zx\n", addr); | |
139 | const char *buf = process_->SendCommand(command); | |
140 | if (!buf) return false; | |
55aea9f5 MO |
141 | uptr line; |
142 | if (!ParseCommandOutput(buf, addr, &stack->info.function, &stack->info.module, | |
143 | &stack->info.file, &line, nullptr)) { | |
696d846a MO |
144 | process_ = nullptr; |
145 | return false; | |
146 | } | |
55aea9f5 | 147 | stack->info.line = (int)line; |
696d846a MO |
148 | return true; |
149 | } | |
150 | ||
55aea9f5 MO |
151 | bool AtosSymbolizer::SymbolizeData(uptr addr, DataInfo *info) { |
152 | if (!process_) return false; | |
153 | char command[32]; | |
154 | internal_snprintf(command, sizeof(command), "0x%zx\n", addr); | |
155 | const char *buf = process_->SendCommand(command); | |
156 | if (!buf) return false; | |
157 | if (!ParseCommandOutput(buf, addr, &info->name, &info->module, nullptr, | |
158 | nullptr, &info->start)) { | |
159 | process_ = nullptr; | |
160 | return false; | |
161 | } | |
162 | return true; | |
163 | } | |
696d846a MO |
164 | |
165 | } // namespace __sanitizer | |
166 | ||
167 | #endif // SANITIZER_MAC |