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//===-- sanitizer_file.h ---------------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See 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.
#include "sanitizer_interface_internal.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);
// 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;
void ReopenIfNecessary();
extern ReportFile report_file;
enum FileAccessMode {
// 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);
char *FindPathToBinary(const char *name);
bool IsPathSeparator(const char c);
bool IsAbsolutePath(const char *path);
// Starts a subprocess and returs 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[],
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