1 //===-- sanitizer_symbolizer.h ----------------------------------*- 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 // Symbolizer is intended to be used by both 11 // AddressSanitizer and ThreadSanitizer to symbolize a given 12 // address. It is an analogue of addr2line utility and allows to map 13 // instruction address to a location in source code at run-time. 14 // 15 // Symbolizer is planned to use debug information (in DWARF format) 16 // in a binary via interface defined in "llvm/DebugInfo/DIContext.h" 17 // 18 // Symbolizer code should be called from the run-time library of 19 // dynamic tools, and generally should not call memory allocation 20 // routines or other system library functions intercepted by those tools. 21 // Instead, Symbolizer code should use their replacements, defined in 22 // "compiler-rt/lib/sanitizer_common/sanitizer_libc.h". 23 //===----------------------------------------------------------------------===// 24 #ifndef SANITIZER_SYMBOLIZER_H 25 #define SANITIZER_SYMBOLIZER_H 26 27 #include "sanitizer_internal_defs.h" 28 #include "sanitizer_libc.h" 29 // WARNING: Do not include system headers here. See details above. 30 31 namespace __sanitizer { 32 33 struct AddressInfo { 34 uptr address; 35 char *module; 36 uptr module_offset; 37 char *function; 38 char *file; 39 int line; 40 int column; 41 42 AddressInfo() { 43 internal_memset(this, 0, sizeof(AddressInfo)); 44 } 45 // Deletes all strings and sets all fields to zero. 46 void Clear(); 47 48 void FillAddressAndModuleInfo(uptr addr, const char *mod_name, 49 uptr mod_offset) { 50 address = addr; 51 module = internal_strdup(mod_name); 52 module_offset = mod_offset; 53 } 54 }; 55 56 // Fills at most "max_frames" elements of "frames" with descriptions 57 // for a given address (in all inlined functions). Returns the number 58 // of descriptions actually filled. 59 // This function should NOT be called from two threads simultaneously. 60 uptr SymbolizeCode(uptr address, AddressInfo *frames, uptr max_frames); 61 62 // Starts external symbolizer program in a subprocess. Sanitizer communicates 63 // with external symbolizer via pipes. 64 bool InitializeExternalSymbolizer(const char *path_to_symbolizer); 65 66 class LoadedModule { 67 public: 68 LoadedModule(const char *module_name, uptr base_address); 69 void addAddressRange(uptr beg, uptr end); 70 bool containsAddress(uptr address) const; 71 72 const char *full_name() const { return full_name_; } 73 uptr base_address() const { return base_address_; } 74 75 private: 76 struct AddressRange { 77 uptr beg; 78 uptr end; 79 }; 80 char *full_name_; 81 uptr base_address_; 82 static const uptr kMaxNumberOfAddressRanges = 8; 83 AddressRange ranges_[kMaxNumberOfAddressRanges]; 84 uptr n_ranges_; 85 }; 86 87 // Creates external symbolizer connected via pipe, user should write 88 // to output_fd and read from input_fd. 89 bool StartSymbolizerSubprocess(const char *path_to_symbolizer, 90 int *input_fd, int *output_fd); 91 92 // OS-dependent function that fills array with descriptions of at most 93 // "max_modules" currently loaded modules. Returns the number of 94 // initialized modules. 95 uptr GetListOfModules(LoadedModule *modules, uptr max_modules); 96 97 } // namespace __sanitizer 98 99 #endif // SANITIZER_SYMBOLIZER_H 100
