xref: /llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_markup_fuchsia.cpp (revision c146c3b7471af576103971354f0d4c7b78f11495)

//===-- sanitizer_symbolizer_markup_fuchsia.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 various sanitizers' runtime libraries.
//
// Fuchsia specific implementation of offline markup symbolizer.
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"

#if SANITIZER_SYMBOLIZER_MARKUP

#  include "sanitizer_common.h"
#  include "sanitizer_stacktrace_printer.h"
#  include "sanitizer_symbolizer.h"
#  include "sanitizer_symbolizer_markup.h"
#  include "sanitizer_symbolizer_markup_constants.h"

namespace __sanitizer {

// This is used by UBSan for type names, and by ASan for global variable names.
// It's expected to return a static buffer that will be reused on each call.
const char *Symbolizer::Demangle(const char *name) {
  static char buffer[kFormatDemangleMax];
  internal_snprintf(buffer, sizeof(buffer), kFormatDemangle, name);
  return buffer;
}

// This is used mostly for suppression matching.  Making it work
// would enable "interceptor_via_lib" suppressions.  It's also used
// once in UBSan to say "in module ..." in a message that also
// includes an address in the module, so post-processing can already
// pretty-print that so as to indicate the module.
bool Symbolizer::GetModuleNameAndOffsetForPC(uptr pc, const char **module_name,
                                             uptr *module_address) {
  return false;
}

// This is mainly used by hwasan for online symbolization. This isn't needed
// since hwasan can always just dump stack frames for offline symbolization.
bool Symbolizer::SymbolizeFrame(uptr addr, FrameInfo *info) { return false; }

// This is used in some places for suppression checking, which we
// don't really support for Fuchsia.  It's also used in UBSan to
// identify a PC location to a function name, so we always fill in
// the function member with a string containing markup around the PC
// value.
// TODO(mcgrathr): Under SANITIZER_GO, it's currently used by TSan
// to render stack frames, but that should be changed to use
// RenderStackFrame.
SymbolizedStack *Symbolizer::SymbolizePC(uptr addr) {
  SymbolizedStack *s = SymbolizedStack::New(addr);
  char buffer[kFormatFunctionMax];
  internal_snprintf(buffer, sizeof(buffer), kFormatFunction, addr);
  s->info.function = internal_strdup(buffer);
  return s;
}

// Always claim we succeeded, so that RenderDataInfo will be called.
bool Symbolizer::SymbolizeData(uptr addr, DataInfo *info) {
  info->Clear();
  info->start = addr;
  return true;
}

// Fuchsia only uses MarkupStackTracePrinter
StackTracePrinter *StackTracePrinter::NewStackTracePrinter() {
  return new (GetGlobalLowLevelAllocator()) MarkupStackTracePrinter();
}

void MarkupStackTracePrinter::RenderContext(InternalScopedString *) {}

Symbolizer *Symbolizer::PlatformInit() {
  return new (symbolizer_allocator_) Symbolizer({});
}

void Symbolizer::LateInitialize() { Symbolizer::GetOrInit(); }

}  // namespace __sanitizer

#endif  // SANITIZER_SYMBOLIZER_MARKUP