7add50d820
libmemunreachable uses an imprecise mark and sweep pass over all memory
allocated by jemalloc in order to find unreachable allocations.
Bug: 27208635
Change-Id: Ia70bbf31f5b40ff71dab28cfd6cd06c5ef01a2d4
(cherry picked from commit bcb4ed3eaa)
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
// Copied from system/extras/memory_replay/LineBuffer.cpp
|
|
// TODO(ccross): find a way to share between libmemunreachable and memory_replay?
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "LineBuffer.h"
|
|
|
|
LineBuffer::LineBuffer(int fd, char* buffer, size_t buffer_len) : fd_(fd), buffer_(buffer), buffer_len_(buffer_len) {
|
|
}
|
|
|
|
bool LineBuffer::GetLine(char** line, size_t* line_len) {
|
|
while (true) {
|
|
if (bytes_ > 0) {
|
|
char* newline = reinterpret_cast<char*>(memchr(buffer_ + start_, '\n', bytes_));
|
|
if (newline != nullptr) {
|
|
*newline = '\0';
|
|
*line = buffer_ + start_;
|
|
start_ = newline - buffer_ + 1;
|
|
bytes_ -= newline - *line + 1;
|
|
*line_len = newline - *line;
|
|
return true;
|
|
}
|
|
}
|
|
if (start_ > 0) {
|
|
// Didn't find anything, copy the current to the front of the buffer.
|
|
memmove(buffer_, buffer_ + start_, bytes_);
|
|
start_ = 0;
|
|
}
|
|
ssize_t bytes = TEMP_FAILURE_RETRY(read(fd_, buffer_ + bytes_, buffer_len_ - bytes_ - 1));
|
|
if (bytes <= 0) {
|
|
if (bytes_ > 0) {
|
|
// The read data might not contain a nul terminator, so add one.
|
|
buffer_[bytes_] = '\0';
|
|
*line = buffer_ + start_;
|
|
*line_len = bytes_;
|
|
bytes_ = 0;
|
|
start_ = 0;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
bytes_ += bytes;
|
|
}
|
|
}
|