375 lines
9.4 KiB
C
375 lines
9.4 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2009, Digium, Inc.
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*
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* Tilghman Lesher <tlesher@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Debugging routines for file descriptor leaks
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*
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* \author Tilghman Lesher \verbatim <tlesher@digium.com> \endverbatim
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#ifdef DEBUG_FD_LEAKS
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#include <stdio.h>
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#include <string.h>
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#include <stddef.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include "asterisk/cli.h"
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#include "asterisk/logger.h"
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#include "asterisk/options.h"
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#include "asterisk/lock.h"
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#include "asterisk/strings.h"
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#include "asterisk/unaligned.h"
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#include "asterisk/localtime.h"
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#include "asterisk/time.h"
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static struct fdleaks {
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const char *callname;
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int line;
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unsigned int isopen:1;
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char file[40];
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char function[25];
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char callargs[100];
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struct timeval now;
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} fdleaks[1024] = { { "", }, };
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/* COPY does ast_copy_string(dst, src, sizeof(dst)), except:
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* - if it doesn't fit, it copies the value after the slash
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* (possibly truncated)
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* - if there is no slash, it copies the value with the head
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* truncated */
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#define COPY(dst, src) \
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do { \
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int dlen = sizeof(dst), slen = strlen(src); \
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if (slen + 1 > dlen) { \
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const char *slash = strrchr(src, '/'); \
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if (slash) { \
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ast_copy_string(dst, slash + 1, dlen); \
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} else { \
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ast_copy_string(dst, src + slen - dlen + 1, dlen); \
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} \
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} else { \
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ast_copy_string(dst, src, dlen); \
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} \
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} while (0)
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#define STORE_COMMON(offset, name, ...) \
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do { \
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struct fdleaks *tmp = &fdleaks[offset]; \
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tmp->now = ast_tvnow(); \
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COPY(tmp->file, file); \
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tmp->line = line; \
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COPY(tmp->function, func); \
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tmp->callname = name; \
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snprintf(tmp->callargs, sizeof(tmp->callargs), __VA_ARGS__); \
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tmp->isopen = 1; \
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} while (0)
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#undef open
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int __ast_fdleak_open(const char *file, int line, const char *func, const char *path, int flags, ...)
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{
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int res;
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va_list ap;
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int mode;
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if (flags & O_CREAT) {
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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res = open(path, flags, mode);
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if (res > -1 && res < ARRAY_LEN(fdleaks)) {
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char sflags[80];
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snprintf(sflags, sizeof(sflags), "O_CREAT%s%s%s%s%s%s%s%s",
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flags & O_APPEND ? "|O_APPEND" : "",
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flags & O_EXCL ? "|O_EXCL" : "",
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flags & O_NONBLOCK ? "|O_NONBLOCK" : "",
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flags & O_TRUNC ? "|O_TRUNC" : "",
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flags & O_RDWR ? "|O_RDWR" : "",
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#if O_RDONLY == 0
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!(flags & (O_WRONLY | O_RDWR)) ? "|O_RDONLY" : "",
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#else
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flags & O_RDONLY ? "|O_RDONLY" : "",
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#endif
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flags & O_WRONLY ? "|O_WRONLY" : "",
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"");
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flags &= ~(O_CREAT | O_APPEND | O_EXCL | O_NONBLOCK | O_TRUNC | O_RDWR | O_RDONLY | O_WRONLY);
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if (flags) {
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STORE_COMMON(res, "open", "\"%s\",%s|%d,%04o", path, sflags, flags, mode);
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} else {
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STORE_COMMON(res, "open", "\"%s\",%s,%04o", path, sflags, mode);
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}
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}
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} else {
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res = open(path, flags);
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if (res > -1 && res < ARRAY_LEN(fdleaks)) {
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STORE_COMMON(res, "open", "\"%s\",%d", path, flags);
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}
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}
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return res;
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}
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#undef accept
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int __ast_fdleak_accept(int socket, struct sockaddr *address, socklen_t *address_len,
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const char *file, int line, const char *func)
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{
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int res = accept(socket, address, address_len);
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if (res >= 0) {
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STORE_COMMON(res, "accept", "{%d}", socket);
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}
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return res;
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}
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#undef pipe
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int __ast_fdleak_pipe(int *fds, const char *file, int line, const char *func)
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{
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int i, res = pipe(fds);
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if (res) {
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return res;
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}
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for (i = 0; i < 2; i++) {
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if (fds[i] > -1 && fds[i] < ARRAY_LEN(fdleaks)) {
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STORE_COMMON(fds[i], "pipe", "{%d,%d}", fds[0], fds[1]);
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}
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}
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return 0;
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}
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#undef socketpair
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int __ast_fdleak_socketpair(int domain, int type, int protocol, int sv[2],
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const char *file, int line, const char *func)
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{
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int i, res = socketpair(domain, type, protocol, sv);
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if (res) {
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return res;
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}
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for (i = 0; i < 2; i++) {
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if (sv[i] > -1 && sv[i] < ARRAY_LEN(fdleaks)) {
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STORE_COMMON(sv[i], "socketpair", "{%d,%d}", sv[0], sv[1]);
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}
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}
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return 0;
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}
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#if defined(HAVE_EVENTFD)
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#undef eventfd
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#include <sys/eventfd.h>
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int __ast_fdleak_eventfd(unsigned int initval, int flags, const char *file, int line, const char *func)
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{
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int res = eventfd(initval, flags);
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if (res >= 0) {
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STORE_COMMON(res, "eventfd", "{%d}", res);
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}
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return res;
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}
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#endif
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#if defined(HAVE_TIMERFD)
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#undef timerfd_create
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#include <sys/timerfd.h>
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int __ast_fdleak_timerfd_create(int clockid, int flags, const char *file, int line, const char *func)
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{
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int res = timerfd_create(clockid, flags);
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if (res >= 0) {
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STORE_COMMON(res, "timerfd_create", "{%d}", res);
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}
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return res;
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}
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#endif
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#undef socket
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int __ast_fdleak_socket(int domain, int type, int protocol, const char *file, int line, const char *func)
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{
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char sdomain[20], stype[20], *sproto = NULL;
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struct protoent *pe;
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int res = socket(domain, type, protocol);
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if (res < 0 || res >= ARRAY_LEN(fdleaks)) {
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return res;
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}
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if ((pe = getprotobynumber(protocol))) {
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sproto = pe->p_name;
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}
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if (domain == PF_UNIX) {
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ast_copy_string(sdomain, "PF_UNIX", sizeof(sdomain));
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} else if (domain == PF_INET) {
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ast_copy_string(sdomain, "PF_INET", sizeof(sdomain));
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} else {
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snprintf(sdomain, sizeof(sdomain), "%d", domain);
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}
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if (type == SOCK_DGRAM) {
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ast_copy_string(stype, "SOCK_DGRAM", sizeof(stype));
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if (protocol == 0) {
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sproto = "udp";
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}
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} else if (type == SOCK_STREAM) {
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ast_copy_string(stype, "SOCK_STREAM", sizeof(stype));
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if (protocol == 0) {
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sproto = "tcp";
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}
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} else {
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snprintf(stype, sizeof(stype), "%d", type);
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}
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if (sproto) {
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STORE_COMMON(res, "socket", "%s,%s,\"%s\"", sdomain, stype, sproto);
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} else {
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STORE_COMMON(res, "socket", "%s,%s,\"%d\"", sdomain, stype, protocol);
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}
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return res;
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}
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#undef close
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int __ast_fdleak_close(int fd)
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{
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int res = close(fd);
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if (!res && fd > -1 && fd < ARRAY_LEN(fdleaks)) {
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fdleaks[fd].isopen = 0;
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}
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return res;
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}
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#undef fopen
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FILE *__ast_fdleak_fopen(const char *path, const char *mode, const char *file, int line, const char *func)
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{
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FILE *res = fopen(path, mode);
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int fd;
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if (!res) {
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return res;
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}
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fd = fileno(res);
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if (fd > -1 && fd < ARRAY_LEN(fdleaks)) {
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STORE_COMMON(fd, "fopen", "\"%s\",\"%s\"", path, mode);
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}
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return res;
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}
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#undef fclose
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int __ast_fdleak_fclose(FILE *ptr)
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{
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int fd, res;
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if (!ptr) {
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return fclose(ptr);
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}
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fd = fileno(ptr);
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if ((res = fclose(ptr)) || fd < 0 || fd >= ARRAY_LEN(fdleaks)) {
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return res;
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}
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fdleaks[fd].isopen = 0;
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return res;
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}
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#undef dup2
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int __ast_fdleak_dup2(int oldfd, int newfd, const char *file, int line, const char *func)
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{
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int res = dup2(oldfd, newfd);
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if (res < 0 || res >= ARRAY_LEN(fdleaks)) {
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return res;
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}
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/* On success, newfd will be closed automatically if it was already
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* open. We don't need to mention anything about that, we're updating
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* the value anyway. */
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STORE_COMMON(res, "dup2", "%d,%d", oldfd, newfd); /* res == newfd */
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return res;
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}
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#undef dup
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int __ast_fdleak_dup(int oldfd, const char *file, int line, const char *func)
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{
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int res = dup(oldfd);
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if (res < 0 || res >= ARRAY_LEN(fdleaks)) {
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return res;
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}
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STORE_COMMON(res, "dup2", "%d", oldfd);
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return res;
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}
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static char *handle_show_fd(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
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{
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int i;
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char line[24];
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struct rlimit rl;
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switch (cmd) {
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case CLI_INIT:
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e->command = "core show fd";
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e->usage =
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"Usage: core show fd\n"
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" List all file descriptors currently in use and where\n"
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" each was opened, and with what command.\n";
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return NULL;
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case CLI_GENERATE:
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return NULL;
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}
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getrlimit(RLIMIT_NOFILE, &rl);
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if (rl.rlim_cur == RLIM_INFINITY) {
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ast_copy_string(line, "unlimited", sizeof(line));
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} else {
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snprintf(line, sizeof(line), "%d", (int) rl.rlim_cur);
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}
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ast_cli(a->fd, "Current maxfiles: %s\n", line);
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for (i = 0; i < ARRAY_LEN(fdleaks); i++) {
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if (fdleaks[i].isopen) {
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struct ast_tm tm = {0};
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char datestring[256];
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ast_localtime(&fdleaks[i].now, &tm, NULL);
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ast_strftime(datestring, sizeof(datestring), "%F %T", &tm);
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snprintf(line, sizeof(line), "%d", fdleaks[i].line);
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ast_cli(a->fd, "%5d [%s] %22s:%-7.7s (%-25s): %s(%s)\n", i, datestring, fdleaks[i].file, line, fdleaks[i].function, fdleaks[i].callname, fdleaks[i].callargs);
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}
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}
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return CLI_SUCCESS;
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}
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static struct ast_cli_entry cli_show_fd = AST_CLI_DEFINE(handle_show_fd, "Show open file descriptors");
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static void fd_shutdown(void)
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{
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ast_cli_unregister(&cli_show_fd);
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}
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int ast_fd_init(void)
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{
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ast_register_cleanup(fd_shutdown);
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return ast_cli_register(&cli_show_fd);
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}
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#else /* !defined(DEBUG_FD_LEAKS) */
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int ast_fd_init(void)
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{
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return 0;
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}
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#endif /* defined(DEBUG_FD_LEAKS) */
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