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/*
* Copyright (C) 2019 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.
*/
#ifndef INCLUDE_PERFETTO_PROFILING_NORMALIZE_H_
#define INCLUDE_PERFETTO_PROFILING_NORMALIZE_H_
// Header only code that gets used in other projects.
// This is currently used in
// * ART
// * Bionic
// * Heapprofd
//
// DO NOT USE THE STL HERE. This gets used in parts of Bionic that do not
// use the STL.
#include <string.h>
namespace perfetto {
namespace profiling {
// Normalize cmdline in place. Stores new beginning of string in *cmdline_ptr.
// Returns new size of string (from new beginning).
// Modifies string in *cmdline_ptr.
static ssize_t NormalizeCmdLine(char** cmdline_ptr, size_t size) {
char* cmdline = *cmdline_ptr;
char* first_arg = static_cast<char*>(memchr(cmdline, '\0', size));
if (first_arg == nullptr) {
errno = EOVERFLOW;
return -1;
}
// For consistency with what we do with Java app cmdlines, trim everything
// after the @ sign of the first arg.
char* first_at = static_cast<char*>(memchr(cmdline, '@', size));
if (first_at != nullptr && first_at < first_arg) {
*first_at = '\0';
first_arg = first_at;
}
char* start = static_cast<char*>(
memrchr(cmdline, '/', static_cast<size_t>(first_arg - cmdline)));
if (start == nullptr) {
start = cmdline;
} else {
// Skip the /.
start++;
}
*cmdline_ptr = start;
return first_arg - start;
}
} // namespace profiling
} // namespace perfetto
#endif // INCLUDE_PERFETTO_PROFILING_NORMALIZE_H_
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