mirror of
https://gitee.com/acl-dev/acl.git
synced 2024-12-13 16:35:35 +08:00
157 lines
3.3 KiB
C++
157 lines
3.3 KiB
C++
#include "lib_acl.h"
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#include <unistd.h>
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#include <execinfo.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifndef __USE_GNU
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#define __USE_GNU
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#endif
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#include <dlfcn.h>
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#include "hook_close.h"
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static acl_pthread_key_t __trace_key;
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static acl_pthread_once_t __trace_once = ACL_PTHREAD_ONCE_INIT;
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static unsigned int *__main_buf = NULL;
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static void trace_buf_free(void *buf)
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{
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if ((unsigned long) acl_pthread_self() != acl_main_thread_self())
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free(buf);
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}
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static void main_buf_free(void)
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{
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if (__main_buf)
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free(__main_buf);
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}
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static void trace_buf_init(void)
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{
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acl_assert(acl_pthread_key_create(&__trace_key, trace_buf_free) == 0);
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}
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static void trace_info(const char* prompt)
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{
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void *buffer[1000];
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size_t n, i;
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char **results;
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unsigned int *intbuf;
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if (acl_pthread_once(&__trace_once, trace_buf_init) != 0)
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return;
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intbuf = (unsigned int *) acl_pthread_getspecific(__trace_key);
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if (intbuf == NULL) {
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intbuf = (unsigned int *) malloc(sizeof(int));
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*intbuf = 0;
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acl_assert(acl_pthread_setspecific(__trace_key, intbuf) == 0);
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if ((unsigned long) acl_pthread_self() == acl_main_thread_self()) {
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__main_buf = intbuf;
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atexit(main_buf_free);
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}
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}
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if ((*intbuf) > 0)
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return;
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n = backtrace(buffer, 1000);
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if (n == 0)
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return;
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(*intbuf)++;
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results = backtrace_symbols(buffer, n);
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for (i = 0; i < n; i++)
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acl_msg_info("%s->backtrace: %s", prompt, results[i]);
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if (results != NULL)
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free(results);
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(*intbuf)--;
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}
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/****************************************************************************/
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typedef int (*close_fn)(int);
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static close_fn __sys_close = NULL;
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void hook_setup(void) __attribute__ ((constructor));
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void hook_setup(void)
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{
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__sys_close = (close_fn) dlsym(RTLD_NEXT, "close");
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}
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static int __monitor_ports[100];
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static int __monitor_ports_max = sizeof(__monitor_ports);
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static int __monitor_ports_cur = 0;
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int monitor_port_add(int port)
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{
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if (port <= 0) {
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acl_msg_error("%s(%d), %s: invalid port: %d",
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__FILE__, __LINE__, __FUNCTION__, port);
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return -1;
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}
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if (__monitor_ports_cur >= __monitor_ports_max) {
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acl_msg_error("too many ports added, cur: %d, max: %d",
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__monitor_ports_cur, __monitor_ports_max);
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return __monitor_ports_cur;
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}
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__monitor_ports[__monitor_ports_cur] = port;
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__monitor_ports_cur++;
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return __monitor_ports_cur;
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}
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static int should_check(int port)
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{
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int i;
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if (port <= 0) {
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acl_msg_error("%s(%d), %s: invalid port: %d",
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__FILE__, __LINE__, __FUNCTION__, port);
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return 0;
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}
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for (i = 0; i < __monitor_ports_cur; i++) {
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if (__monitor_ports[i] == port)
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return 1;
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}
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return 0;
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}
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int close(int fd)
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{
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char peer[64], *at, buf[256];
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if (fd < 0) {
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acl_msg_error("%s(%d), %s: invalid fd: %d",
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__FILE__, __LINE__, __FUNCTION__, fd);
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trace_info("invalid fd");
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return -1;
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}
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if (__monitor_ports_cur == 0
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|| acl_getpeername(fd, peer, sizeof(peer)) == -1)
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{
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peer[0] = 0;
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} else if ((at = strchr(peer, ':')) && *++at && should_check(atoi(at))) {
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snprintf(buf, sizeof(buf), "closing %s", peer);
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trace_info(buf);
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}
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if (__sys_close(fd) == 0)
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return 0;
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snprintf(buf, sizeof(buf), "close error %s, fd=%d, peer=%s",
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acl_last_serror(), fd, peer);
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trace_info(buf);
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return -1;
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}
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