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utils.c
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utils.c
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/* ******************************************************************************
* Copyright (c) 2013-2016 Google, Inc. All rights reserved.
* Copyright (c) 2011 Massachusetts Institute of Technology All rights reserved.
* Copyright (c) 2008 VMware, Inc. All rights reserved.
* ******************************************************************************/
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Google, Inc. nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE, INC. OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#include "utils.h"
#include "drx.h"
#include <stdio.h>
#ifdef WINDOWS
# include <io.h>
#endif
file_t
log_file_open(client_id_t id, void *drcontext,
const char *path, const char *name, uint flags)
{
file_t log;
char log_dir[MAXIMUM_PATH];
char buf[MAXIMUM_PATH];
size_t len;
char *dirsep;
DR_ASSERT(name != NULL);
len = dr_snprintf(log_dir, BUFFER_SIZE_ELEMENTS(log_dir), "%s",
path == NULL ? dr_get_client_path(id) : path);
DR_ASSERT(len > 0);
NULL_TERMINATE_BUFFER(log_dir);
dirsep = log_dir + len - 1;
if (path == NULL /* removing client lib */ ||
/* path does not have a trailing / and is too large to add it */
(*dirsep != '/' IF_WINDOWS(&& *dirsep != '\\') &&
len == BUFFER_SIZE_ELEMENTS(log_dir) - 1)) {
for (dirsep = log_dir + len;
*dirsep != '/' IF_WINDOWS(&& *dirsep != '\\');
dirsep--)
DR_ASSERT(dirsep > log_dir);
}
/* remove trailing / if necessary */
if (*dirsep == '/' IF_WINDOWS(|| *dirsep == '\\'))
*dirsep = 0;
else if (sizeof(log_dir) > (dirsep + 1 - log_dir)/sizeof(log_dir[0]))
*(dirsep + 1) = 0;
NULL_TERMINATE_BUFFER(log_dir);
/* we do not need call drx_init before using drx_open_unique_appid_file */
log = drx_open_unique_appid_file(log_dir, dr_get_process_id(),
name, "log", flags,
buf, BUFFER_SIZE_ELEMENTS(buf));
if (log != INVALID_FILE) {
char msg[MAXIMUM_PATH];
len = dr_snprintf(msg, BUFFER_SIZE_ELEMENTS(msg), "Data file %s created", buf);
DR_ASSERT(len > 0);
NULL_TERMINATE_BUFFER(msg);
dr_log(drcontext, LOG_ALL, 1, "%s", msg);
#ifdef SHOW_RESULTS
DISPLAY_STRING(msg);
# ifdef WINDOWS
if (dr_is_notify_on()) {
/* assuming dr_enable_console_printing() is called in the initialization */
dr_fprintf(STDERR, "%s\n", msg);
}
# endif /* WINDOWS */
#endif /* SHOW_RESULTS */
}
return log;
}
void
log_file_close(file_t log)
{
dr_close_file(log);
}
FILE *
log_stream_from_file(file_t f)
{
#ifdef WINDOWS
int fd = _open_osfhandle((intptr_t)f, 0);
if (fd == -1)
return NULL;
return _fdopen(fd, "w");
#else
return fdopen(f, "w");
#endif
}
void
log_stream_close(FILE *f)
{
fclose(f); /* closes underlying fd too for all platforms */
}