tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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crash_logging.cc (2510B)

      1 // Copyright 2012 The Chromium Authors
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/debug/crash_logging.h"
      6 
      7 #include <ostream>
      8 
      9 #include "base/strings/string_piece.h"
     10 #include "build/build_config.h"
     11 
     12 namespace base::debug {
     13 
     14 namespace {
     15 
     16 CrashKeyImplementation* g_crash_key_impl = nullptr;
     17 
     18 }  // namespace
     19 
     20 CrashKeyString* AllocateCrashKeyString(const char name[],
     21                                       CrashKeySize value_length) {
     22  if (!g_crash_key_impl)
     23    return nullptr;
     24 
     25    // TODO(https://crbug.com/1341077): It would be great if the DCHECKs below
     26    // could also be enabled on Android, but debugging tryjob failures was a bit
     27    // difficult... :-/
     28 #if DCHECK_IS_ON() && !BUILDFLAG(IS_ANDROID)
     29  base::StringPiece name_piece = name;
     30 
     31  // Some `CrashKeyImplementation`s reserve certain characters and disallow
     32  // using them in crash key names.  See also https://crbug.com/1341077.
     33  DCHECK_EQ(base::StringPiece::npos, name_piece.find(':'))
     34      << "; name_piece = " << name_piece;
     35 
     36  // Some `CrashKeyImplementation`s support only short crash key names (e.g. see
     37  // the DCHECK in crash_reporter::internal::CrashKeyStringImpl::Set).
     38  // Enforcing this restrictions here ensures that crash keys will work for all
     39  // `CrashKeyStringImpl`s.
     40  DCHECK_LT(name_piece.size(), 40u);
     41 #endif
     42 
     43  return g_crash_key_impl->Allocate(name, value_length);
     44 }
     45 
     46 void SetCrashKeyString(CrashKeyString* crash_key, base::StringPiece value) {
     47  if (!g_crash_key_impl || !crash_key)
     48    return;
     49 
     50  g_crash_key_impl->Set(crash_key, value);
     51 }
     52 
     53 void ClearCrashKeyString(CrashKeyString* crash_key) {
     54  if (!g_crash_key_impl || !crash_key)
     55    return;
     56 
     57  g_crash_key_impl->Clear(crash_key);
     58 }
     59 
     60 void OutputCrashKeysToStream(std::ostream& out) {
     61  if (!g_crash_key_impl)
     62    return;
     63 
     64  g_crash_key_impl->OutputCrashKeysToStream(out);
     65 }
     66 
     67 ScopedCrashKeyString::ScopedCrashKeyString(CrashKeyString* crash_key,
     68                                           base::StringPiece value)
     69    : crash_key_(crash_key) {
     70  SetCrashKeyString(crash_key_, value);
     71 }
     72 
     73 ScopedCrashKeyString::ScopedCrashKeyString(ScopedCrashKeyString&& other)
     74    : crash_key_(std::exchange(other.crash_key_, nullptr)) {}
     75 
     76 ScopedCrashKeyString::~ScopedCrashKeyString() {
     77  ClearCrashKeyString(crash_key_);
     78 }
     79 
     80 void SetCrashKeyImplementation(std::unique_ptr<CrashKeyImplementation> impl) {
     81  delete g_crash_key_impl;
     82  g_crash_key_impl = impl.release();
     83 }
     84 
     85 }  // namespace base::debug