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/*
* Copyright (C) 2020 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.
*/
#include "src/profiling/symbolizer/scoped_read_mmap.h"
#if !PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/file_utils.h"
#include <sys/mman.h>
namespace perfetto {
namespace profiling {
ScopedReadMmap::ScopedReadMmap(const char* fname, size_t length)
: length_(length), fd_(base::OpenFile(fname, O_RDONLY)) {
if (!fd_) {
PERFETTO_PLOG("Failed to open %s", fname);
return;
}
ptr_ = mmap(nullptr, length, PROT_READ, MAP_PRIVATE, *fd_, 0);
}
ScopedReadMmap::~ScopedReadMmap() {
if (ptr_ != MAP_FAILED)
munmap(ptr_, length_);
}
bool ScopedReadMmap::IsValid() {
return ptr_ != MAP_FAILED;
}
} // namespace profiling
} // namespace perfetto
#endif // !PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
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