1
2 /* $Id: fpm_php_trace.c,v 1.27.2.1 2008/11/15 00:57:24 anight Exp $ */
3 /* (c) 2007,2008 Andrei Nigmatulin */
4
5 #include "fpm_config.h"
6
7 #if HAVE_FPM_TRACE
8
9 #include "php.h"
10 #include "php_main.h"
11
12 #include <stdio.h>
13 #include <stddef.h>
14 #if HAVE_INTTYPES_H
15 # include <inttypes.h>
16 #else
17 # include <stdint.h>
18 #endif
19 #include <unistd.h>
20 #include <sys/time.h>
21 #include <sys/types.h>
22 #include <errno.h>
23
24 #include "fpm_trace.h"
25 #include "fpm_php_trace.h"
26 #include "fpm_children.h"
27 #include "fpm_worker_pool.h"
28 #include "fpm_process_ctl.h"
29 #include "fpm_scoreboard.h"
30
31 #include "zlog.h"
32
33
34 #define valid_ptr(p) ((p) && 0 == ((p) & (sizeof(long) - 1)))
35
36 #if SIZEOF_LONG == 4
37 #define PTR_FMT "08"
38 #elif SIZEOF_LONG == 8
39 #define PTR_FMT "016"
40 #endif
41
42
fpm_php_trace_dump(struct fpm_child_s * child,FILE * slowlog)43 static int fpm_php_trace_dump(struct fpm_child_s *child, FILE *slowlog) /* {{{ */
44 {
45 int callers_limit = 20;
46 pid_t pid = child->pid;
47 struct timeval tv;
48 static const int buf_size = 1024;
49 char buf[buf_size];
50 long execute_data;
51 long path_translated;
52 long l;
53
54 gettimeofday(&tv, 0);
55
56 zlog_print_time(&tv, buf, buf_size);
57
58 fprintf(slowlog, "\n%s [pool %s] pid %d\n", buf, child->wp->config->name, (int) pid);
59
60 if (0 > fpm_trace_get_long((long) &SG(request_info).path_translated, &l)) {
61 return -1;
62 }
63
64 path_translated = l;
65
66 if (0 > fpm_trace_get_strz(buf, buf_size, path_translated)) {
67 return -1;
68 }
69
70 fprintf(slowlog, "script_filename = %s\n", buf);
71
72 if (0 > fpm_trace_get_long((long) &EG(current_execute_data), &l)) {
73 return -1;
74 }
75
76 execute_data = l;
77
78 while (execute_data) {
79 long function;
80 long function_name;
81 long file_name;
82 long prev;
83 uint lineno = 0;
84
85 if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, func), &l)) {
86 return -1;
87 }
88
89 function = l;
90
91 if (valid_ptr(function)) {
92 if (0 > fpm_trace_get_long(function + offsetof(zend_function, common.function_name), &l)) {
93 return -1;
94 }
95
96 function_name = l;
97
98 if (function_name == 0) {
99 uint32_t *call_info = (uint32_t *)&l;
100 if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, This.u1.type_info), &l)) {
101 return -1;
102 }
103
104 if (ZEND_CALL_KIND_EX((*call_info) >> 24) == ZEND_CALL_TOP_CODE) {
105 return 0;
106 } else if (ZEND_CALL_KIND_EX(*(call_info) >> 24) == ZEND_CALL_NESTED_CODE) {
107 memcpy(buf, "[INCLUDE_OR_EVAL]", sizeof("[INCLUDE_OR_EVAL]"));
108 } else {
109 ZEND_ASSERT(0);
110 }
111 } else {
112 if (0 > fpm_trace_get_strz(buf, buf_size, function_name + offsetof(zend_string, val))) {
113 return -1;
114 }
115
116 }
117 } else {
118 memcpy(buf, "???", sizeof("???"));
119 }
120
121 fprintf(slowlog, "[0x%" PTR_FMT "lx] ", execute_data);
122
123 fprintf(slowlog, "%s()", buf);
124
125 *buf = '\0';
126
127 if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, prev_execute_data), &l)) {
128 return -1;
129 }
130
131 execute_data = prev = l;
132
133 while (prev) {
134 zend_uchar *type;
135
136 if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, func), &l)) {
137 return -1;
138 }
139
140 function = l;
141
142 if (!valid_ptr(function)) {
143 break;
144 }
145
146 type = (zend_uchar *)&l;
147 if (0 > fpm_trace_get_long(function + offsetof(zend_function, type), &l)) {
148 return -1;
149 }
150
151 if (ZEND_USER_CODE(*type)) {
152 if (0 > fpm_trace_get_long(function + offsetof(zend_op_array, filename), &l)) {
153 return -1;
154 }
155
156 file_name = l;
157
158 if (0 > fpm_trace_get_strz(buf, buf_size, file_name + offsetof(zend_string, val))) {
159 return -1;
160 }
161
162 if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, opline), &l)) {
163 return -1;
164 }
165
166 if (valid_ptr(l)) {
167 long opline = l;
168 uint32_t *lu = (uint32_t *) &l;
169
170 if (0 > fpm_trace_get_long(opline + offsetof(struct _zend_op, lineno), &l)) {
171 return -1;
172 }
173
174 lineno = *lu;
175 }
176 break;
177 }
178
179 if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, prev_execute_data), &l)) {
180 return -1;
181 }
182
183 prev = l;
184 }
185
186 fprintf(slowlog, " %s:%u\n", *buf ? buf : "unknown", lineno);
187
188 if (0 == --callers_limit) {
189 break;
190 }
191 }
192
193 return 0;
194 }
195 /* }}} */
196
fpm_php_trace(struct fpm_child_s * child)197 void fpm_php_trace(struct fpm_child_s *child) /* {{{ */
198 {
199 fpm_scoreboard_update(0, 0, 0, 0, 0, 0, 1, FPM_SCOREBOARD_ACTION_INC, child->wp->scoreboard);
200 FILE *slowlog;
201
202 zlog(ZLOG_NOTICE, "about to trace %d", (int) child->pid);
203
204 slowlog = fopen(child->wp->config->slowlog, "a+");
205
206 if (!slowlog) {
207 zlog(ZLOG_SYSERROR, "unable to open slowlog (%s)", child->wp->config->slowlog);
208 goto done0;
209 }
210
211 if (0 > fpm_trace_ready(child->pid)) {
212 goto done1;
213 }
214
215 if (0 > fpm_php_trace_dump(child, slowlog)) {
216 fprintf(slowlog, "+++ dump failed\n");
217 }
218
219 if (0 > fpm_trace_close(child->pid)) {
220 goto done1;
221 }
222
223 done1:
224 fclose(slowlog);
225
226 done0:
227 fpm_pctl_kill(child->pid, FPM_PCTL_CONT);
228 child->tracer = 0;
229
230 zlog(ZLOG_NOTICE, "finished trace of %d", (int) child->pid);
231 }
232 /* }}} */
233
234 #endif
235
236
