mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/process/memory.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
#include <new>
|
|
|
|
#include "base/allocator/allocator_shim.h"
|
|
#include "base/allocator/features.h"
|
|
#include "base/files/file_path.h"
|
|
#include "base/files/file_util.h"
|
|
#include "base/logging.h"
|
|
#include "base/process/internal_linux.h"
|
|
#include "base/strings/string_number_conversions.h"
|
|
#include "build/build_config.h"
|
|
|
|
#if defined(USE_TCMALLOC)
|
|
#include "third_party/tcmalloc/chromium/src/gperftools/tcmalloc.h"
|
|
#endif
|
|
|
|
namespace base {
|
|
|
|
size_t g_oom_size = 0U;
|
|
|
|
namespace {
|
|
|
|
void OnNoMemorySize(size_t size) {
|
|
g_oom_size = size;
|
|
|
|
if (size != 0)
|
|
LOG(FATAL) << "Out of memory, size = " << size;
|
|
LOG(FATAL) << "Out of memory.";
|
|
}
|
|
|
|
void OnNoMemory() {
|
|
OnNoMemorySize(0);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
void EnableTerminationOnHeapCorruption() {
|
|
// On Linux, there nothing to do AFAIK.
|
|
}
|
|
|
|
void EnableTerminationOnOutOfMemory() {
|
|
// Set the new-out of memory handler.
|
|
std::set_new_handler(&OnNoMemory);
|
|
// If we're using glibc's allocator, the above functions will override
|
|
// malloc and friends and make them die on out of memory.
|
|
|
|
#if BUILDFLAG(USE_ALLOCATOR_SHIM)
|
|
allocator::SetCallNewHandlerOnMallocFailure(true);
|
|
#elif defined(USE_TCMALLOC)
|
|
// For tcmalloc, we need to tell it to behave like new.
|
|
tc_set_new_mode(1);
|
|
#endif
|
|
}
|
|
|
|
// NOTE: This is not the only version of this function in the source:
|
|
// the setuid sandbox (in process_util_linux.c, in the sandbox source)
|
|
// also has its own C version.
|
|
bool AdjustOOMScore(ProcessId process, int score) {
|
|
if (score < 0 || score > kMaxOomScore)
|
|
return false;
|
|
|
|
FilePath oom_path(internal::GetProcPidDir(process));
|
|
|
|
// Attempt to write the newer oom_score_adj file first.
|
|
FilePath oom_file = oom_path.AppendASCII("oom_score_adj");
|
|
if (PathExists(oom_file)) {
|
|
std::string score_str = IntToString(score);
|
|
DVLOG(1) << "Adjusting oom_score_adj of " << process << " to "
|
|
<< score_str;
|
|
int score_len = static_cast<int>(score_str.length());
|
|
return (score_len == WriteFile(oom_file, score_str.c_str(), score_len));
|
|
}
|
|
|
|
// If the oom_score_adj file doesn't exist, then we write the old
|
|
// style file and translate the oom_adj score to the range 0-15.
|
|
oom_file = oom_path.AppendASCII("oom_adj");
|
|
if (PathExists(oom_file)) {
|
|
// Max score for the old oom_adj range. Used for conversion of new
|
|
// values to old values.
|
|
const int kMaxOldOomScore = 15;
|
|
|
|
int converted_score = score * kMaxOldOomScore / kMaxOomScore;
|
|
std::string score_str = IntToString(converted_score);
|
|
DVLOG(1) << "Adjusting oom_adj of " << process << " to " << score_str;
|
|
int score_len = static_cast<int>(score_str.length());
|
|
return (score_len == WriteFile(oom_file, score_str.c_str(), score_len));
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool UncheckedMalloc(size_t size, void** result) {
|
|
#if BUILDFLAG(USE_ALLOCATOR_SHIM)
|
|
*result = allocator::UncheckedAlloc(size);
|
|
#elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || \
|
|
(!defined(LIBC_GLIBC) && !defined(USE_TCMALLOC))
|
|
*result = malloc(size);
|
|
#elif defined(LIBC_GLIBC) && !defined(USE_TCMALLOC)
|
|
*result = __libc_malloc(size);
|
|
#elif defined(USE_TCMALLOC)
|
|
*result = tc_malloc_skip_new_handler(size);
|
|
#endif
|
|
return *result != NULL;
|
|
}
|
|
|
|
} // namespace base
|