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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2009, Digium, Inc.
*
* Tilghman Lesher <tlesher@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Debugging routines for file descriptor leaks
*
* \author Tilghman Lesher <tlesher@digium.com>
*/
#include "asterisk.h"
#ifdef DEBUG_FD_LEAKS
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "asterisk/cli.h"
#include "asterisk/logger.h"
#include "asterisk/options.h"
#include "asterisk/lock.h"
#include "asterisk/strings.h"
#include "asterisk/unaligned.h"
static struct fdleaks {
char file[40];
int line;
char function[25];
char callname[10];
char callargs[60];
unsigned int isopen:1;
} fdleaks[1024] = { { "", }, };
#define COPY(dst, src) \
do { \
int dlen = sizeof(dst), slen = strlen(src); \
if (slen + 1 > dlen) { \
char *slash = strrchr(src, '/'); \
if (slash) { \
ast_copy_string(dst, slash + 1, dlen); \
} else { \
ast_copy_string(dst, src + slen - dlen + 1, dlen); \
} \
} else { \
ast_copy_string(dst, src, dlen); \
} \
} while (0)
#define STORE_COMMON(offset, name, ...) \
COPY(fdleaks[offset].file, file); \
fdleaks[offset].line = line; \
COPY(fdleaks[offset].function, func); \
strcpy(fdleaks[offset].callname, name); \
snprintf(fdleaks[offset].callargs, sizeof(fdleaks[offset].callargs), __VA_ARGS__); \
fdleaks[offset].isopen = 1;
#undef open
int __ast_fdleak_open(const char *file, int line, const char *func, const char *path, int flags, ...)
{
int res;
va_list ap;
int mode;
if (flags & O_CREAT) {
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
res = open(path, flags, mode);
if (res > -1 && res < (sizeof(fdleaks) / sizeof(fdleaks[0]))) {
char sflags[80];
snprintf(sflags, sizeof(sflags), "O_CREAT%s%s%s%s%s%s%s%s",
flags & O_APPEND ? "|O_APPEND" : "",
flags & O_EXCL ? "|O_EXCL" : "",
flags & O_NONBLOCK ? "|O_NONBLOCK" : "",
flags & O_TRUNC ? "|O_TRUNC" : "",
flags & O_RDWR ? "|O_RDWR" : "",
flags & O_RDONLY ? "|O_RDONLY" : "",
flags & O_WRONLY ? "|O_WRONLY" : "",
"");
flags &= ~(O_CREAT | O_APPEND | O_EXCL | O_NONBLOCK | O_TRUNC | O_RDWR | O_RDONLY | O_WRONLY);
if (flags) {
STORE_COMMON(res, "open", "\"%s\",%s|%d,%04o", path, sflags, flags, mode);
} else {
STORE_COMMON(res, "open", "\"%s\",%s,%04o", path, sflags, mode);
}
}
} else {
res = open(path, flags);
if (res > -1 && res < (sizeof(fdleaks) / sizeof(fdleaks[0]))) {
STORE_COMMON(res, "open", "\"%s\",%d", path, flags);
}
}
return res;
}
#undef pipe
int __ast_fdleak_pipe(int *fds, const char *file, int line, const char *func)
{
int i, res = pipe(fds);
if (res) {
return res;
}
for (i = 0; i < 2; i++) {
STORE_COMMON(fds[i], "pipe", "{%d,%d}", fds[0], fds[1]);
}
return 0;
}
#undef socket
int __ast_fdleak_socket(int domain, int type, int protocol, const char *file, int line, const char *func)
{
char sdomain[20], stype[20], *sproto;
struct protoent *pe;
int res = socket(domain, type, protocol);
if (res < 0 || res > 1023) {
return res;
}
pe = getprotobynumber(protocol);
sproto = pe->p_name;
if (domain == PF_UNIX) {
ast_copy_string(sdomain, "PF_UNIX", sizeof(sdomain));
} else if (domain == PF_INET) {
ast_copy_string(sdomain, "PF_INET", sizeof(sdomain));
} else {
snprintf(sdomain, sizeof(sdomain), "%d", domain);
}
if (type == SOCK_DGRAM) {
ast_copy_string(stype, "SOCK_DGRAM", sizeof(stype));
if (protocol == 0) {
sproto = "udp";
}
} else if (type == SOCK_STREAM) {
ast_copy_string(stype, "SOCK_STREAM", sizeof(stype));
if (protocol == 0) {
sproto = "tcp";
}
} else {
snprintf(stype, sizeof(stype), "%d", type);
}
STORE_COMMON(res, "socket", "%s,%s,\"%s\"", sdomain, stype, sproto);
return res;
}
#undef close
int __ast_fdleak_close(int fd)
{
int res = close(fd);
if (!res && fd > -1 && fd < 1024) {
fdleaks[fd].isopen = 0;
}
return res;
}
#undef fopen
FILE *__ast_fdleak_fopen(const char *path, const char *mode, const char *file, int line, const char *func)
{
FILE *res = fopen(path, mode);
int fd;
if (!res) {
return res;
}
fd = fileno(res);
STORE_COMMON(fd, "fopen", "\"%s\",\"%s\"", path, mode);
return res;
}
#undef fclose
int __ast_fdleak_fclose(FILE *ptr)
{
int fd, res;
if (!ptr) {
return fclose(ptr);
}
fd = fileno(ptr);
if ((res = fclose(ptr)) || fd < 0 || fd > 1023) {
return res;
}
fdleaks[fd].isopen = 0;
return res;
}
#undef dup2
int __ast_fdleak_dup2(int oldfd, int newfd, const char *file, int line, const char *func)
{
int res = dup2(oldfd, newfd);
if (res < 0 || res > 1023) {
return res;
}
STORE_COMMON(res, "dup2", "%d,%d", oldfd, newfd);
return res;
}
#undef dup
int __ast_fdleak_dup(int oldfd, const char *file, int line, const char *func)
{
int res = dup(oldfd);
if (res < 0 || res > 1023) {
return res;
}
STORE_COMMON(res, "dup2", "%d", oldfd);
return res;
}
static char *handle_show_fd(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
int i;
char line[24];
struct rlimit rl;
switch (cmd) {
case CLI_INIT:
e->command = "core show fd";
e->usage =
"Usage: core show fd\n"
" List all file descriptors currently in use and where\n"
" each was opened, and with what command.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
getrlimit(RLIMIT_FSIZE, &rl);
if (rl.rlim_cur == RLIM_INFINITY || rl.rlim_max == RLIM_INFINITY) {
ast_copy_string(line, "unlimited", sizeof(line));
} else {
snprintf(line, sizeof(line), "%d/%d", (int) rl.rlim_cur, (int) rl.rlim_max);
}
ast_cli(a->fd, "Current maxfiles: %s\n", line);
for (i = 0; i < 1024; i++) {
if (fdleaks[i].isopen) {
snprintf(line, sizeof(line), "%d", fdleaks[i].line);
ast_cli(a->fd, "%5d %15s:%-7.7s (%-25s): %s(%s)\n", i, fdleaks[i].file, line, fdleaks[i].function, fdleaks[i].callname, fdleaks[i].callargs);
}
}
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_show_fd = AST_CLI_DEFINE(handle_show_fd, "Show open file descriptors");
int ast_fd_init(void)
{
return ast_cli_register(&cli_show_fd);
}
#else /* !defined(DEBUG_FD_LEAKS) */
int ast_fd_init(void)
{
return 0;
}
#endif /* defined(DEBUG_FD_LEAKS) */
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