1 /* (c) 2007,2008 Andrei Nigmatulin */
2
3 #ifndef _GNU_SOURCE
4 # define _GNU_SOURCE
5 #endif
6 #define _FILE_OFFSET_BITS 64
7
8 #include "fpm_config.h"
9
10 #include <unistd.h>
11
12 #include <fcntl.h>
13 #include <stdio.h>
14 #include <inttypes.h>
15
16 #include "fpm_trace.h"
17 #include "fpm_process_ctl.h"
18 #include "zlog.h"
19
20 static int mem_file = -1;
21
fpm_trace_signal(pid_t pid)22 int fpm_trace_signal(pid_t pid) /* {{{ */
23 {
24 if (0 > fpm_pctl_kill(pid, FPM_PCTL_STOP)) {
25 zlog(ZLOG_SYSERROR, "failed to send SIGSTOP to %d", pid);
26 return -1;
27 }
28 return 0;
29 }
30 /* }}} */
31
fpm_trace_ready(pid_t pid)32 int fpm_trace_ready(pid_t pid) /* {{{ */
33 {
34 char buf[128];
35
36 sprintf(buf, "/proc/%d/" PROC_MEM_FILE, (int) pid);
37 mem_file = open(buf, O_RDONLY);
38 if (0 > mem_file) {
39 zlog(ZLOG_SYSERROR, "failed to open %s", buf);
40 return -1;
41 }
42 return 0;
43 }
44 /* }}} */
45
fpm_trace_close(pid_t pid)46 int fpm_trace_close(pid_t pid) /* {{{ */
47 {
48 close(mem_file);
49 mem_file = -1;
50 return 0;
51 }
52 /* }}} */
53
fpm_trace_get_long(long addr,long * data)54 int fpm_trace_get_long(long addr, long *data) /* {{{ */
55 {
56 if (sizeof(*data) != pread(mem_file, (void *) data, sizeof(*data), (uintptr_t) addr)) {
57 zlog(ZLOG_SYSERROR, "pread() failed");
58 return -1;
59 }
60 return 0;
61 }
62 /* }}} */
63
