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kmp_io.cpp
/*
* kmp_io.cpp -- RTL IO
*/
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __ABSOFT_WIN
#include <sys/types.h>
#endif
#include "kmp.h" // KMP_GTID_DNE, __kmp_debug_buf, etc
#include "kmp_io.h"
#include "kmp_lock.h"
#include "kmp_os.h"
#include "kmp_str.h"
#if KMP_OS_WINDOWS
#if KMP_MSVC_COMPAT
#pragma warning(push)
#pragma warning(disable : 271 310)
#endif
#include <windows.h>
#if KMP_MSVC_COMPAT
#pragma warning(pop)
#endif
#endif
/* ------------------------------------------------------------------------ */
kmp_bootstrap_lock_t __kmp_stdio_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER(
__kmp_stdio_lock); /* Control stdio functions */
kmp_bootstrap_lock_t __kmp_console_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER(
__kmp_console_lock); /* Control console initialization */
#if KMP_OS_WINDOWS
static HANDLE __kmp_stdout = NULL;
static HANDLE __kmp_stderr = NULL;
static int __kmp_console_exists = FALSE;
static kmp_str_buf_t __kmp_console_buf;
static int is_console(void) {
char buffer[128];
DWORD rc = 0;
DWORD err = 0;
// Try to get console title.
SetLastError(0);
// GetConsoleTitle does not reset last error in case of success or short
// buffer, so we need to clear it explicitly.
rc = GetConsoleTitle(buffer, sizeof(buffer));
if (rc == 0) {
// rc == 0 means getting console title failed. Let us find out why.
err = GetLastError();
// err == 0 means buffer too short (we suppose console exists).
// In Window applications we usually have err == 6 (invalid handle).
}
return rc > 0 || err == 0;
}
void __kmp_close_console(void) {
/* wait until user presses return before closing window */
/* TODO only close if a window was opened */
if (__kmp_console_exists) {
__kmp_stdout = NULL;
__kmp_stderr = NULL;
__kmp_str_buf_free(&__kmp_console_buf);
__kmp_console_exists = FALSE;
}
}
/* For windows, call this before stdout, stderr, or stdin are used.
It opens a console window and starts processing */
static void __kmp_redirect_output(void) {
__kmp_acquire_bootstrap_lock(&__kmp_console_lock);
(void)is_console;
if (!__kmp_console_exists) {
HANDLE ho;
HANDLE he;
__kmp_str_buf_init(&__kmp_console_buf);
AllocConsole();
// We do not check the result of AllocConsole because
// 1. the call is harmless
// 2. it is not clear how to communicate failue
// 3. we will detect failure later when we get handle(s)
ho = GetStdHandle(STD_OUTPUT_HANDLE);
if (ho == INVALID_HANDLE_VALUE || ho == NULL) {
DWORD err = GetLastError();
// TODO: output error somehow (maybe message box)
(void)err;
__kmp_stdout = NULL;
} else {
__kmp_stdout = ho; // temporary code, need new global for ho
}
he = GetStdHandle(STD_ERROR_HANDLE);
if (he == INVALID_HANDLE_VALUE || he == NULL) {
DWORD err = GetLastError();
// TODO: output error somehow (maybe message box)
(void)err;
__kmp_stderr = NULL;
} else {
__kmp_stderr = he; // temporary code, need new global
}
__kmp_console_exists = TRUE;
}
__kmp_release_bootstrap_lock(&__kmp_console_lock);
}
#else
#define __kmp_stderr (stderr)
#define __kmp_stdout (stdout)
#endif /* KMP_OS_WINDOWS */
void __kmp_vprintf(enum kmp_io out_stream, char const *format, va_list ap) {
#if KMP_OS_WINDOWS
if (!__kmp_console_exists) {
__kmp_redirect_output();
}
if (!__kmp_stderr && out_stream == kmp_err) {
return;
}
if (!__kmp_stdout && out_stream == kmp_out) {
return;
}
#endif /* KMP_OS_WINDOWS */
auto stream = ((out_stream == kmp_out) ? __kmp_stdout : __kmp_stderr);
if (__kmp_debug_buf && __kmp_debug_buffer != NULL) {
int dc = __kmp_debug_count++ % __kmp_debug_buf_lines;
char *db = &__kmp_debug_buffer[dc * __kmp_debug_buf_chars];
int chars = 0;
#ifdef KMP_DEBUG_PIDS
chars = KMP_SNPRINTF(db, __kmp_debug_buf_chars,
"pid=%d: ", (kmp_int32)getpid());
#endif
chars += KMP_VSNPRINTF(db, __kmp_debug_buf_chars, format, ap);
if (chars + 1 > __kmp_debug_buf_chars) {
if (chars + 1 > __kmp_debug_buf_warn_chars) {
#if KMP_OS_WINDOWS
DWORD count;
__kmp_str_buf_print(&__kmp_console_buf,
"OMP warning: Debugging buffer "
"overflow; increase "
"KMP_DEBUG_BUF_CHARS to %d\n",
chars + 1);
WriteFile(stream, __kmp_console_buf.str, __kmp_console_buf.used, &count,
NULL);
__kmp_str_buf_clear(&__kmp_console_buf);
#else
fprintf(stream,
"OMP warning: Debugging buffer overflow; "
"increase KMP_DEBUG_BUF_CHARS to %d\n",
chars + 1);
fflush(stream);
#endif
__kmp_debug_buf_warn_chars = chars + 1;
}
/* terminate string if overflow occurred */
db[__kmp_debug_buf_chars - 2] = '\n';
db[__kmp_debug_buf_chars - 1] = '\0';
}
} else {
#if KMP_OS_WINDOWS
DWORD count;
#ifdef KMP_DEBUG_PIDS
__kmp_str_buf_print(&__kmp_console_buf, "pid=%d: ", (kmp_int32)getpid());
#endif
__kmp_str_buf_vprint(&__kmp_console_buf, format, ap);
WriteFile(stream, __kmp_console_buf.str, __kmp_console_buf.used, &count,
NULL);
__kmp_str_buf_clear(&__kmp_console_buf);
#else
#ifdef KMP_DEBUG_PIDS
fprintf(stream, "pid=%d: ", (kmp_int32)getpid());
#endif
vfprintf(stream, format, ap);
fflush(stream);
#endif
}
}
void __kmp_printf(char const *format, ...) {
va_list ap;
va_start(ap, format);
__kmp_acquire_bootstrap_lock(&__kmp_stdio_lock);
__kmp_vprintf(kmp_err, format, ap);
__kmp_release_bootstrap_lock(&__kmp_stdio_lock);
va_end(ap);
}
void __kmp_printf_no_lock(char const *format, ...) {
va_list ap;
va_start(ap, format);
__kmp_vprintf(kmp_err, format, ap);
va_end(ap);
}
void __kmp_fprintf(enum kmp_io stream, char const *format, ...) {
va_list ap;
va_start(ap, format);
__kmp_acquire_bootstrap_lock(&__kmp_stdio_lock);
__kmp_vprintf(stream, format, ap);
__kmp_release_bootstrap_lock(&__kmp_stdio_lock);
va_end(ap);
}