mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 14:45:29 +00:00
129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=2 et sw=2 tw=80: */
|
|
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* Original author: bcampen@mozilla.com */
|
|
|
|
#include <cstdarg>
|
|
|
|
#include "rlogringbuffer.h"
|
|
|
|
#include <deque>
|
|
#include <string>
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/Move.h" // Pinch hitting for <utility> and std::move
|
|
#include "mozilla/Mutex.h"
|
|
#include <vector>
|
|
|
|
extern "C" {
|
|
#include <csi_platform.h>
|
|
#include "r_log.h"
|
|
}
|
|
|
|
/* Matches r_dest_vlog type defined in r_log.h */
|
|
static int ringbuffer_vlog(int facility,
|
|
int level,
|
|
const char *format,
|
|
va_list ap) {
|
|
MOZ_ASSERT(mozilla::RLogRingBuffer::GetInstance());
|
|
// I could be evil and printf right into a std::string, but unless this
|
|
// shows up in profiling, it is not worth doing.
|
|
char temp[4096];
|
|
vsnprintf(temp, sizeof(temp), format, ap);
|
|
|
|
mozilla::RLogRingBuffer::GetInstance()->Log(std::string(temp));
|
|
return 0;
|
|
}
|
|
|
|
namespace mozilla {
|
|
|
|
RLogRingBuffer* RLogRingBuffer::instance;
|
|
|
|
RLogRingBuffer::RLogRingBuffer()
|
|
: log_limit_(4096),
|
|
mutex_("RLogRingBuffer::mutex_") {
|
|
}
|
|
|
|
RLogRingBuffer::~RLogRingBuffer() {
|
|
}
|
|
|
|
void RLogRingBuffer::SetLogLimit(uint32_t new_limit) {
|
|
OffTheBooksMutexAutoLock lock(mutex_);
|
|
log_limit_ = new_limit;
|
|
RemoveOld();
|
|
}
|
|
|
|
void RLogRingBuffer::Log(std::string&& log) {
|
|
OffTheBooksMutexAutoLock lock(mutex_);
|
|
log_messages_.push_front(Move(log));
|
|
RemoveOld();
|
|
}
|
|
|
|
inline void RLogRingBuffer::RemoveOld() {
|
|
if (log_messages_.size() > log_limit_) {
|
|
log_messages_.resize(log_limit_);
|
|
}
|
|
}
|
|
|
|
|
|
RLogRingBuffer* RLogRingBuffer::CreateInstance() {
|
|
if (!instance) {
|
|
instance = new RLogRingBuffer;
|
|
r_log_set_extra_destination(LOG_INFO, &ringbuffer_vlog);
|
|
}
|
|
return instance;
|
|
}
|
|
|
|
RLogRingBuffer* RLogRingBuffer::GetInstance() {
|
|
return instance;
|
|
}
|
|
|
|
void RLogRingBuffer::DestroyInstance() {
|
|
// First param is ignored when passing null
|
|
r_log_set_extra_destination(LOG_INFO, nullptr);
|
|
delete instance;
|
|
instance = nullptr;
|
|
}
|
|
|
|
void RLogRingBuffer::Filter(const std::string& substring,
|
|
uint32_t limit,
|
|
std::deque<std::string>* matching_logs) {
|
|
std::vector<std::string> substrings;
|
|
substrings.push_back(substring);
|
|
FilterAny(substrings, limit, matching_logs);
|
|
}
|
|
|
|
inline bool AnySubstringMatches(const std::vector<std::string>& substrings,
|
|
const std::string& string) {
|
|
for (auto sub = substrings.begin(); sub != substrings.end(); ++sub) {
|
|
if (string.find(*sub) != std::string::npos) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void RLogRingBuffer::FilterAny(const std::vector<std::string>& substrings,
|
|
uint32_t limit,
|
|
std::deque<std::string>* matching_logs) {
|
|
OffTheBooksMutexAutoLock lock(mutex_);
|
|
if (limit == 0) {
|
|
// At a max, all of the log messages.
|
|
limit = log_limit_;
|
|
}
|
|
|
|
for (auto log = log_messages_.begin();
|
|
log != log_messages_.end() && matching_logs->size() < limit;
|
|
++log) {
|
|
if (AnySubstringMatches(substrings, *log)) {
|
|
matching_logs->push_front(*log);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|