forked from OSchip/llvm-project
100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
//===-- sanitizer_symbolizer.h ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Symbolizer is intended to be used by both
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// AddressSanitizer and ThreadSanitizer to symbolize a given
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// address. It is an analogue of addr2line utility and allows to map
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// instruction address to a location in source code at run-time.
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//
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// Symbolizer is planned to use debug information (in DWARF format)
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// in a binary via interface defined in "llvm/DebugInfo/DIContext.h"
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//
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// Symbolizer code should be called from the run-time library of
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// dynamic tools, and generally should not call memory allocation
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// routines or other system library functions intercepted by those tools.
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// Instead, Symbolizer code should use their replacements, defined in
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// "compiler-rt/lib/sanitizer_common/sanitizer_libc.h".
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_SYMBOLIZER_H
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#define SANITIZER_SYMBOLIZER_H
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_libc.h"
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// WARNING: Do not include system headers here. See details above.
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namespace __sanitizer {
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struct AddressInfo {
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uptr address;
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char *module;
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uptr module_offset;
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char *function;
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char *file;
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int line;
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int column;
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AddressInfo() {
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internal_memset(this, 0, sizeof(AddressInfo));
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}
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// Deletes all strings and sets all fields to zero.
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void Clear();
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void FillAddressAndModuleInfo(uptr addr, const char *mod_name,
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uptr mod_offset) {
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address = addr;
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module = internal_strdup(mod_name);
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module_offset = mod_offset;
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}
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};
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// Fills at most "max_frames" elements of "frames" with descriptions
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// for a given address (in all inlined functions). Returns the number
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// of descriptions actually filled.
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// This function should NOT be called from two threads simultaneously.
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uptr SymbolizeCode(uptr address, AddressInfo *frames, uptr max_frames);
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// Starts external symbolizer program in a subprocess. Sanitizer communicates
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// with external symbolizer via pipes.
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bool InitializeExternalSymbolizer(const char *path_to_symbolizer);
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class LoadedModule {
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public:
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LoadedModule(const char *module_name, uptr base_address);
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void addAddressRange(uptr beg, uptr end);
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bool containsAddress(uptr address) const;
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const char *full_name() const { return full_name_; }
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uptr base_address() const { return base_address_; }
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private:
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struct AddressRange {
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uptr beg;
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uptr end;
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};
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char *full_name_;
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uptr base_address_;
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static const uptr kMaxNumberOfAddressRanges = 8;
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AddressRange ranges_[kMaxNumberOfAddressRanges];
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uptr n_ranges_;
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};
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// Creates external symbolizer connected via pipe, user should write
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// to output_fd and read from input_fd.
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bool StartSymbolizerSubprocess(const char *path_to_symbolizer,
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int *input_fd, int *output_fd);
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// OS-dependent function that fills array with descriptions of at most
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// "max_modules" currently loaded modules. Returns the number of
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// initialized modules.
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uptr GetListOfModules(LoadedModule *modules, uptr max_modules);
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} // namespace __sanitizer
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#endif // SANITIZER_SYMBOLIZER_H
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