llvm/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp

//===-- sanitizer_symbolizer_posix_libcdep.cpp ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
// POSIX-specific implementation of symbolizer parts.
//===----------------------------------------------------------------------===//

#include "sanitizer_platform.h"
#include "sanitizer_symbolizer_markup.h"
#if SANITIZER_POSIX
#  include <dlfcn.h>  // for dlsym()
#  include <errno.h>
#  include <stdint.h>
#  include <stdlib.h>
#  include <sys/wait.h>
#  include <unistd.h>

#  include "sanitizer_allocator_internal.h"
#  include "sanitizer_common.h"
#  include "sanitizer_file.h"
#  include "sanitizer_flags.h"
#  include "sanitizer_internal_defs.h"
#  include "sanitizer_linux.h"
#  include "sanitizer_placement_new.h"
#  include "sanitizer_posix.h"
#  include "sanitizer_procmaps.h"
#  include "sanitizer_symbolizer_internal.h"
#  include "sanitizer_symbolizer_libbacktrace.h"
#  include "sanitizer_symbolizer_mac.h"

// C++ demangling function, as required by Itanium C++ ABI. This is weak,
// because we do not require a C++ ABI library to be linked to a program
// using sanitizers; if it's not present, we'll just use the mangled name.
namespace __cxxabiv1 {
  extern "C" SANITIZER_WEAK_ATTRIBUTE
  char *__cxa_demangle(const char *mangled, char *buffer,
                                  size_t *length, int *status);
}

namespace __sanitizer {

// Attempts to demangle the name via __cxa_demangle from __cxxabiv1.
const char *DemangleCXXABI(const char *name) { … }

// As of now, there are no headers for the Swift runtime. Once they are
// present, we will weakly link since we do not require Swift runtime to be
// linked.
swift_demangle_ft;
static swift_demangle_ft swift_demangle_f;

// This must not happen lazily at symbolication time, because dlsym uses
// malloc and thread-local storage, which is not a good thing to do during
// symbolication.
static void InitializeSwiftDemangler() { … }

// Attempts to demangle a Swift name. The demangler will return nullptr if a
// non-Swift name is passed in.
const char *DemangleSwift(const char *name) { … }

const char *DemangleSwiftAndCXX(const char *name) { … }

static bool CreateTwoHighNumberedPipes(int *infd_, int *outfd_) { … }

bool SymbolizerProcess::StartSymbolizerSubprocess() { … }

class Addr2LineProcess final : public SymbolizerProcess { … };

const char Addr2LineProcess::output_terminator_[] = …;

bool Addr2LineProcess::ReachedEndOfOutput(const char *buffer,
                                          uptr length) const { … }

class Addr2LinePool final : public SymbolizerTool { … };

#  if SANITIZER_SUPPORTS_WEAK_HOOKS
extern "C" {
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_code(const char *ModuleName, u64 ModuleOffset,
                           char *Buffer, int MaxLength);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_data(const char *ModuleName, u64 ModuleOffset,
                           char *Buffer, int MaxLength);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_frame(const char *ModuleName, u64 ModuleOffset,
                            char *Buffer, int MaxLength);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void
__sanitizer_symbolize_flush();
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_demangle(const char *Name, char *Buffer, int MaxLength);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_set_demangle(bool Demangle);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE bool
__sanitizer_symbolize_set_inline_frames(bool InlineFrames);
}  // extern "C"

class InternalSymbolizer final : public SymbolizerTool { … };
#  else  // SANITIZER_SUPPORTS_WEAK_HOOKS

class InternalSymbolizer final : public SymbolizerTool {
 public:
  static InternalSymbolizer *get(LowLevelAllocator *alloc) { return 0; }
};

#  endif  // SANITIZER_SUPPORTS_WEAK_HOOKS

const char *Symbolizer::PlatformDemangle(const char *name) { … }

static SymbolizerTool *ChooseExternalSymbolizer(LowLevelAllocator *allocator) { … }

static void ChooseSymbolizerTools(IntrusiveList<SymbolizerTool> *list,
                                  LowLevelAllocator *allocator) { … }

Symbolizer *Symbolizer::PlatformInit() { … }

void Symbolizer::LateInitialize() { … }

}  // namespace __sanitizer

#endif  // SANITIZER_POSIX