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92a42be0 SL |
1 | //===-- sanitizer_symbolizer_mac.cc ---------------------------------------===// |
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 | // This file is shared between various sanitizers' runtime libraries. | |
11 | // | |
12 | // Implementation of Mac-specific "atos" symbolizer. | |
13 | //===----------------------------------------------------------------------===// | |
14 | ||
15 | #include "sanitizer_platform.h" | |
16 | #if SANITIZER_MAC | |
17 | ||
18 | #include "sanitizer_allocator_internal.h" | |
19 | #include "sanitizer_mac.h" | |
20 | #include "sanitizer_symbolizer_mac.h" | |
21 | ||
22 | namespace __sanitizer { | |
23 | ||
24 | #include <dlfcn.h> | |
25 | #include <errno.h> | |
26 | #include <stdlib.h> | |
27 | #include <sys/wait.h> | |
28 | #include <unistd.h> | |
29 | #include <util.h> | |
30 | ||
31 | bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) { | |
32 | Dl_info info; | |
33 | int result = dladdr((const void *)addr, &info); | |
34 | if (!result) return false; | |
5bcae85e | 35 | const char *demangled = DemangleSwiftAndCXX(info.dli_sname); |
3157f602 | 36 | stack->info.function = demangled ? internal_strdup(demangled) : nullptr; |
92a42be0 SL |
37 | return true; |
38 | } | |
39 | ||
3157f602 XL |
40 | bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) { |
41 | Dl_info info; | |
42 | int result = dladdr((const void *)addr, &info); | |
43 | if (!result) return false; | |
5bcae85e | 44 | const char *demangled = DemangleSwiftAndCXX(info.dli_sname); |
3157f602 XL |
45 | datainfo->name = internal_strdup(demangled); |
46 | datainfo->start = (uptr)info.dli_saddr; | |
47 | return true; | |
92a42be0 SL |
48 | } |
49 | ||
50 | class AtosSymbolizerProcess : public SymbolizerProcess { | |
51 | public: | |
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); | |
57 | } | |
58 | ||
59 | private: | |
60 | bool ReachedEndOfOutput(const char *buffer, uptr length) const override { | |
61 | return (length >= 1 && buffer[length - 1] == '\n'); | |
62 | } | |
63 | ||
64 | void GetArgV(const char *path_to_binary, | |
65 | const char *(&argv)[kArgVMax]) const override { | |
66 | int i = 0; | |
67 | argv[i++] = path_to_binary; | |
68 | argv[i++] = "-p"; | |
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 | |
73 | // newer ones. | |
74 | argv[i++] = "-d"; | |
75 | } | |
76 | argv[i++] = nullptr; | |
77 | } | |
78 | ||
79 | char pid_str_[16]; | |
80 | }; | |
81 | ||
3157f602 XL |
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) { | |
92a42be0 SL |
85 | // Trim ending newlines. |
86 | char *trim; | |
87 | ExtractTokenUpToDelimiter(str, "\n", &trim); | |
88 | ||
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 | |
3157f602 | 92 | // myfunction (in library.dylib) + 15 |
92a42be0 | 93 | // 0xdeadbeef (in library.dylib) + 0x1fe |
3157f602 | 94 | // 0xdeadbeef (in library.dylib) + 15 |
92a42be0 SL |
95 | // 0xdeadbeef (in library.dylib) |
96 | // 0xdeadbeef | |
97 | ||
92a42be0 | 98 | const char *rest = trim; |
3157f602 XL |
99 | char *symbol_name; |
100 | rest = ExtractTokenUpToDelimiter(rest, " (in ", &symbol_name); | |
101 | if (rest[0] == '\0') { | |
102 | InternalFree(symbol_name); | |
103 | InternalFree(trim); | |
104 | return false; | |
105 | } | |
106 | ||
107 | if (internal_strncmp(symbol_name, "0x", 2) != 0) | |
108 | *out_name = symbol_name; | |
92a42be0 | 109 | else |
3157f602 XL |
110 | InternalFree(symbol_name); |
111 | rest = ExtractTokenUpToDelimiter(rest, ") ", out_module); | |
92a42be0 SL |
112 | |
113 | if (rest[0] == '(') { | |
3157f602 XL |
114 | if (out_file) { |
115 | rest++; | |
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); | |
121 | } | |
122 | } else if (rest[0] == '+') { | |
123 | rest += 2; | |
124 | uptr offset = internal_atoll(rest); | |
125 | if (start_address) *start_address = addr - offset; | |
92a42be0 SL |
126 | } |
127 | ||
128 | InternalFree(trim); | |
129 | return true; | |
130 | } | |
131 | ||
132 | AtosSymbolizer::AtosSymbolizer(const char *path, LowLevelAllocator *allocator) | |
133 | : process_(new(*allocator) AtosSymbolizerProcess(path, getpid())) {} | |
134 | ||
135 | bool AtosSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) { | |
136 | if (!process_) return false; | |
5bcae85e | 137 | if (addr == 0) return false; |
92a42be0 SL |
138 | char command[32]; |
139 | internal_snprintf(command, sizeof(command), "0x%zx\n", addr); | |
140 | const char *buf = process_->SendCommand(command); | |
141 | if (!buf) return false; | |
3157f602 XL |
142 | uptr line; |
143 | if (!ParseCommandOutput(buf, addr, &stack->info.function, &stack->info.module, | |
144 | &stack->info.file, &line, nullptr)) { | |
92a42be0 SL |
145 | process_ = nullptr; |
146 | return false; | |
147 | } | |
3157f602 | 148 | stack->info.line = (int)line; |
92a42be0 SL |
149 | return true; |
150 | } | |
151 | ||
3157f602 XL |
152 | bool AtosSymbolizer::SymbolizeData(uptr addr, DataInfo *info) { |
153 | if (!process_) return false; | |
154 | char command[32]; | |
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)) { | |
160 | process_ = nullptr; | |
161 | return false; | |
162 | } | |
163 | return true; | |
164 | } | |
92a42be0 SL |
165 | |
166 | } // namespace __sanitizer | |
167 | ||
168 | #endif // SANITIZER_MAC |