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56 lines
1.6 KiB
56 lines
1.6 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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// This file provides a wrapper for open.
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extern "C" {
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int __real_open(const char* pathname, int flags, ...);
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static bool needs_mode(int flags) {
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return ((flags & O_CREAT) == O_CREAT) || ((flags & O_TMPFILE) == O_TMPFILE);
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}
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static const char* PROFRAW_START = "/data/misc/trace/";
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static bool is_coverage_trace(const char* pathname) {
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if (strncmp(pathname, PROFRAW_START, strlen(PROFRAW_START)) == 0) return true;
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return false;
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}
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__attribute__((weak)) int __wrap_open(const char* pathname, int flags, ...) {
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if (!needs_mode(flags)) {
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return __real_open(pathname, flags);
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}
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va_list args;
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va_start(args, flags);
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mode_t mode = static_cast<mode_t>(va_arg(args, int));
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va_end(args);
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int ret = __real_open(pathname, flags, mode);
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if (ret != -1 && is_coverage_trace(pathname)) fchmod(ret, mode);
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return ret;
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}
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}
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