1
2 /* $Id: fpm_trace_mach.c,v 1.4 2008/08/26 15:09:15 anight Exp $ */
3 /* (c) 2007,2008 Andrei Nigmatulin */
4
5 #include "fpm_config.h"
6
7 #include <mach/mach.h>
8 #include <mach/mach_vm.h>
9
10 #include <unistd.h>
11
12 #include "fpm_trace.h"
13 #include "fpm_process_ctl.h"
14 #include "fpm_unix.h"
15 #include "zlog.h"
16
17
18 static mach_port_name_t target;
19 static vm_offset_t target_page_base;
20 static vm_offset_t local_page;
21 static mach_msg_type_number_t local_size;
22
fpm_mach_vm_deallocate()23 static void fpm_mach_vm_deallocate() /* {{{ */
24 {
25 if (local_page) {
26 mach_vm_deallocate(mach_task_self(), local_page, local_size);
27 target_page_base = 0;
28 local_page = 0;
29 local_size = 0;
30 }
31 }
32 /* }}} */
33
fpm_mach_vm_read_page(vm_offset_t page)34 static int fpm_mach_vm_read_page(vm_offset_t page) /* {{{ */
35 {
36 kern_return_t kr;
37
38 kr = mach_vm_read(target, page, fpm_pagesize, &local_page, &local_size);
39 if (kr != KERN_SUCCESS) {
40 zlog(ZLOG_ERROR, "failed to read vm page: mach_vm_read(): %s (%d)", mach_error_string(kr), kr);
41 return -1;
42 }
43 return 0;
44 }
45 /* }}} */
46
fpm_trace_signal(pid_t pid)47 int fpm_trace_signal(pid_t pid) /* {{{ */
48 {
49 if (0 > fpm_pctl_kill(pid, FPM_PCTL_STOP)) {
50 zlog(ZLOG_SYSERROR, "failed to send SIGSTOP to %d", pid);
51 return -1;
52 }
53 return 0;
54 }
55 /* }}} */
56
fpm_trace_ready(pid_t pid)57 int fpm_trace_ready(pid_t pid) /* {{{ */
58 {
59 kern_return_t kr;
60
61 kr = task_for_pid(mach_task_self(), pid, &target);
62 if (kr != KERN_SUCCESS) {
63 char *msg = "";
64
65 if (kr == KERN_FAILURE) {
66 msg = " It seems that master process does not have enough privileges to trace processes.";
67 }
68 zlog(ZLOG_ERROR, "task_for_pid() failed: %s (%d)%s", mach_error_string(kr), kr, msg);
69 return -1;
70 }
71 return 0;
72 }
73 /* }}} */
74
fpm_trace_close(pid_t pid)75 int fpm_trace_close(pid_t pid) /* {{{ */
76 {
77 fpm_mach_vm_deallocate();
78 target = 0;
79 return 0;
80 }
81 /* }}} */
82
fpm_trace_get_long(long addr,long * data)83 int fpm_trace_get_long(long addr, long *data) /* {{{ */
84 {
85 size_t offset = ((uintptr_t) (addr) % fpm_pagesize);
86 vm_offset_t base = (uintptr_t) (addr) - offset;
87
88 if (base != target_page_base) {
89 fpm_mach_vm_deallocate();
90 if (0 > fpm_mach_vm_read_page(base)) {
91 return -1;
92 }
93 }
94 *data = * (long *) (local_page + offset);
95 return 0;
96 }
97 /* }}} */
98
99
100
