mirror of
https://github.com/lifting-bits/remill
synced 2026-06-21 13:56:07 +00:00
Peter Goodman
99df2e19d4
* Running clang-format on files with some additional custom scripts for my style * Fix missing unique_ptr in remill/BC/Optimizer.h * Fixes and selective disabling of clang-format
148 lines
3.7 KiB
C++
148 lines
3.7 KiB
C++
/*
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* Copyright (c) 2018 Trail of Bits, Inc.
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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 <sys/stat.h>
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#if !defined(_WIN32)
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// These headers are not present on a Windows build
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// and seem to be not needed.
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//
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// _WIN32 is a general check for Windows, not just 32-bit windows.
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//
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// Per the documentation:
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//
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// _WIN32 Defined as 1 when the compilation target is 32-bit ARM, 64-bit
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// ARM, x86, or x64. Otherwise, undefined.
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# include <sys/param.h>
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# include <sys/time.h>
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# include <unistd.h>
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#endif
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#if defined(__APPLE__)
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# include <Availability.h>
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# include <os/availability.h>
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# include <sys/syslimits.h>
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#elif defined(__linux__)
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# include <linux/limits.h>
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#endif
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#ifndef PATH_MAX
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# define PATH_MAX 4096
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#endif
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#ifndef MAXPATHLEN
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# define MAXPATHLEN PATH_MAX
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#endif
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#include <cerrno>
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extern "C" {
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#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_13
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# ifndef UTIME_NOW
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# define UTIME_NOW -1
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# endif
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# ifndef UTIME_OMIT
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# define UTIME_OMIT -2
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# endif
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// Implementation of `futimens` for Mac OS X versions less than 10.13. This is
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// so that any Remill dependencies (e.g. Google Log) will build.
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int futimens(int fd, const struct timespec times[2]) {
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auto last_access = &(times[0]);
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auto last_modified = &(times[1]);
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auto need_now = !times || last_access->tv_nsec == UTIME_NOW ||
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last_modified->tv_nsec == UTIME_NOW;
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struct timespec curr_last_access = {};
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struct timespec curr_last_modified = {};
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struct stat buf = {};
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int ret = fstat(fd, &buf);
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if (-1 == ret) {
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return ret;
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}
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// Extract the current last access and modified times.
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# if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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curr_last_access = buf.st_atimespec;
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curr_last_modified = buf.st_mtimespec;
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# else
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curr_last_access.tv_sec = buf.st_atime;
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curr_last_access.tv_nsec = buf.st_atimensec;
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curr_last_modified.tv_sec = buf.st_mtime;
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curr_last_modified.tv_nsec = buf.st_mtimensec;
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# endif
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// Figure out the current time if it's needed.
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struct timespec time_now = {};
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if (need_now) {
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struct timeval time_now_usec = {};
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ret = gettimeofday(&time_now_usec, nullptr);
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if (-1 == ret) {
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return ret;
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}
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time_now.tv_sec = time_now_usec.tv_sec;
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time_now.tv_nsec = time_now_usec.tv_usec * 1000;
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if (!times) {
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last_access = &time_now;
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last_modified = &time_now;
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} else {
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if (last_access->tv_nsec == UTIME_NOW) {
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last_access = &time_now;
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}
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if (last_modified->tv_nsec == UTIME_NOW) {
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last_modified = &time_now;
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}
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}
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}
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if (last_access->tv_nsec == UTIME_OMIT) {
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last_access = &curr_last_access;
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}
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if (last_modified->tv_nsec == UTIME_OMIT) {
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last_modified = &curr_last_modified;
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}
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struct timeval new_utimes[2] = {};
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new_utimes[0].tv_sec = last_access->tv_sec;
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new_utimes[0].tv_usec = last_access->tv_nsec / 1000;
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new_utimes[1].tv_sec = last_modified->tv_sec;
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new_utimes[1].tv_usec = last_modified->tv_nsec / 1000;
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return futimes(fd, new_utimes);
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}
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int utimensat(int fd, const char *path, const struct timespec times[2],
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int flag) {
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errno = ENOSYS;
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return -1;
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}
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#else
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void __dummy_symbol_compat_cpp(void) {}
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#endif
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} // extern C
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