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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/base_paths_apple.h"
#include <dlfcn.h>
#include <mach-o/dyld.h>
#include <stdint.h>
#include "base/check_op.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/threading/thread_restrictions.h"
namespace base::apple::internal {
base::FilePath GetExecutablePath() {
// Executable path can have relative references ("..") depending on
// how the app was launched.
uint32_t executable_length = 0;
_NSGetExecutablePath(NULL, &executable_length);
DCHECK_GT(executable_length, 1u);
// `executable_length` is the total buffer size required including the NUL
// terminator, while `basic_string` guarantees that enough space is reserved
// so that index may be any value between 0 and size() inclusive, though it is
// UB to set `str[size()]` to anything other than '\0'.
std::string executable_path(executable_length - 1, '\0');
int rv = _NSGetExecutablePath(executable_path.data(), &executable_length);
DCHECK_EQ(rv, 0);
// _NSGetExecutablePath may return paths containing ./ or ../ which makes
// FilePath::DirName() work incorrectly, convert it to absolute path so that
// paths such as DIR_SRC_TEST_DATA_ROOT can work, since we expect absolute
// paths to be returned here.
// TODO(bauerb): http://crbug.com/259796, http://crbug.com/373477
base::ScopedAllowBlocking allow_blocking;
return base::MakeAbsoluteFilePath(base::FilePath(executable_path));
}
bool GetModulePathForAddress(base::FilePath* path, const void* address) {
Dl_info info;
if (dladdr(address, &info) == 0) {
return false;
}
*path = base::FilePath(info.dli_fname);
return true;
}
} // namespace base::apple::internal
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