| //===-- sanitizer_file.h ---------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===---------------------------------------------------------------------===// |
| // |
| // This file is shared between run-time libraries of sanitizers. |
| // It declares filesystem-related interfaces. This is separate from |
| // sanitizer_common.h so that it's simpler to disable all the filesystem |
| // support code for a port that doesn't use it. |
| // |
| //===---------------------------------------------------------------------===// |
| #ifndef SANITIZER_FILE_H |
| #define SANITIZER_FILE_H |
| |
| #include "sanitizer_common.h" |
| #include "sanitizer_internal_defs.h" |
| #include "sanitizer_libc.h" |
| #include "sanitizer_mutex.h" |
| |
| namespace __sanitizer { |
| |
| struct ReportFile { |
| void Write(const char *buffer, uptr length); |
| bool SupportsColors(); |
| void SetReportPath(const char *path); |
| const char *GetReportPath(); |
| |
| // Don't use fields directly. They are only declared public to allow |
| // aggregate initialization. |
| |
| // Protects fields below. |
| StaticSpinMutex *mu; |
| // Opened file descriptor. Defaults to stderr. It may be equal to |
| // kInvalidFd, in which case new file will be opened when necessary. |
| fd_t fd; |
| // Path prefix of report file, set via __sanitizer_set_report_path. |
| char path_prefix[kMaxPathLength]; |
| // Full path to report, obtained as <path_prefix>.PID |
| char full_path[kMaxPathLength]; |
| // PID of the process that opened fd. If a fork() occurs, |
| // the PID of child will be different from fd_pid. |
| uptr fd_pid; |
| |
| private: |
| void ReopenIfNecessary(); |
| }; |
| extern ReportFile report_file; |
| |
| enum FileAccessMode { |
| RdOnly, |
| WrOnly, |
| RdWr |
| }; |
| |
| // Returns kInvalidFd on error. |
| fd_t OpenFile(const char *filename, FileAccessMode mode, |
| error_t *errno_p = nullptr); |
| void CloseFile(fd_t); |
| |
| // Return true on success, false on error. |
| bool ReadFromFile(fd_t fd, void *buff, uptr buff_size, |
| uptr *bytes_read = nullptr, error_t *error_p = nullptr); |
| bool WriteToFile(fd_t fd, const void *buff, uptr buff_size, |
| uptr *bytes_written = nullptr, error_t *error_p = nullptr); |
| |
| // Scoped file handle closer. |
| struct FileCloser { |
| explicit FileCloser(fd_t fd) : fd(fd) {} |
| ~FileCloser() { CloseFile(fd); } |
| fd_t fd; |
| }; |
| |
| bool SupportsColoredOutput(fd_t fd); |
| |
| // OS |
| const char *GetPwd(); |
| bool FileExists(const char *filename); |
| bool DirExists(const char *path); |
| char *FindPathToBinary(const char *name); |
| bool IsPathSeparator(const char c); |
| bool IsAbsolutePath(const char *path); |
| // Returns true on success, false on failure. |
| bool CreateDir(const char *pathname); |
| // Starts a subprocess and returns its pid. |
| // If *_fd parameters are not kInvalidFd their corresponding input/output |
| // streams will be redirect to the file. The files will always be closed |
| // in parent process even in case of an error. |
| // The child process will close all fds after STDERR_FILENO |
| // before passing control to a program. |
| pid_t StartSubprocess(const char *filename, const char *const argv[], |
| const char *const envp[], fd_t stdin_fd = kInvalidFd, |
| fd_t stdout_fd = kInvalidFd, fd_t stderr_fd = kInvalidFd); |
| // Checks if specified process is still running |
| bool IsProcessRunning(pid_t pid); |
| // Waits for the process to finish and returns its exit code. |
| // Returns -1 in case of an error. |
| int WaitForProcess(pid_t pid); |
| |
| // Maps given file to virtual memory, and returns pointer to it |
| // (or NULL if mapping fails). Stores the size of mmaped region |
| // in '*buff_size'. |
| void *MapFileToMemory(const char *file_name, uptr *buff_size); |
| void *MapWritableFileToMemory(void *addr, uptr size, fd_t fd, OFF_T offset); |
| |
| } // namespace __sanitizer |
| |
| #endif // SANITIZER_FILE_H |