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/* $Id: fpm_php_trace.c,v 1.27.2.1 2008/11/15 00:57:24 anight Exp $ */
/* (c) 2007,2008 Andrei Nigmatulin */
#include "fpm_config.h"
#if HAVE_FPM_TRACE
#include "php.h"
#include "php_main.h"
#include <stdio.h>
#include <stddef.h>
#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# include <stdint.h>
#endif
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <errno.h>
#include "fpm_trace.h"
#include "fpm_php_trace.h"
#include "fpm_children.h"
#include "fpm_worker_pool.h"
#include "fpm_process_ctl.h"
#include "fpm_scoreboard.h"
#include "zlog.h"
#define valid_ptr(p) ((p) && 0 == ((p) & (sizeof(long) - 1)))
#if SIZEOF_LONG == 4
#define PTR_FMT "08"
#elif SIZEOF_LONG == 8
#define PTR_FMT "016"
#endif
static int fpm_php_trace_dump(struct fpm_child_s *child, FILE *slowlog) /* {{{ */
{
int callers_limit = 20;
pid_t pid = child->pid;
struct timeval tv;
static const int buf_size = 1024;
char buf[buf_size];
long execute_data;
long path_translated;
long l;
gettimeofday(&tv, 0);
zlog_print_time(&tv, buf, buf_size);
fprintf(slowlog, "\n%s [pool %s] pid %d\n", buf, child->wp->config->name, (int) pid);
if (0 > fpm_trace_get_long((long) &SG(request_info).path_translated, &l)) {
return -1;
}
path_translated = l;
if (0 > fpm_trace_get_strz(buf, buf_size, path_translated)) {
return -1;
}
fprintf(slowlog, "script_filename = %s\n", buf);
if (0 > fpm_trace_get_long((long) &EG(current_execute_data), &l)) {
return -1;
}
execute_data = l;
while (execute_data) {
long function;
long function_name;
long file_name;
long prev;
uint lineno = 0;
if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, func), &l)) {
return -1;
}
function = l;
if (valid_ptr(function)) {
if (0 > fpm_trace_get_long(function + offsetof(zend_function, common.function_name), &l)) {
return -1;
}
function_name = l;
if (function_name == 0) {
uint32_t *call_info = (uint32_t *)&l;
if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, This.u1.type_info), &l)) {
return -1;
}
if (ZEND_CALL_KIND_EX((*call_info) >> ZEND_CALL_INFO_SHIFT) == ZEND_CALL_TOP_CODE) {
return 0;
} else if (ZEND_CALL_KIND_EX(*(call_info) >> ZEND_CALL_INFO_SHIFT) == ZEND_CALL_NESTED_CODE) {
memcpy(buf, "[INCLUDE_OR_EVAL]", sizeof("[INCLUDE_OR_EVAL]"));
} else {
ZEND_ASSERT(0);
}
} else {
if (0 > fpm_trace_get_strz(buf, buf_size, function_name + offsetof(zend_string, val))) {
return -1;
}
}
} else {
memcpy(buf, "???", sizeof("???"));
}
fprintf(slowlog, "[0x%" PTR_FMT "lx] ", execute_data);
fprintf(slowlog, "%s()", buf);
*buf = '\0';
if (0 > fpm_trace_get_long(execute_data + offsetof(zend_execute_data, prev_execute_data), &l)) {
return -1;
}
execute_data = prev = l;
while (prev) {
zend_uchar *type;
if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, func), &l)) {
return -1;
}
function = l;
if (!valid_ptr(function)) {
break;
}
type = (zend_uchar *)&l;
if (0 > fpm_trace_get_long(function + offsetof(zend_function, type), &l)) {
return -1;
}
if (ZEND_USER_CODE(*type)) {
if (0 > fpm_trace_get_long(function + offsetof(zend_op_array, filename), &l)) {
return -1;
}
file_name = l;
if (0 > fpm_trace_get_strz(buf, buf_size, file_name + offsetof(zend_string, val))) {
return -1;
}
if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, opline), &l)) {
return -1;
}
if (valid_ptr(l)) {
long opline = l;
uint32_t *lu = (uint32_t *) &l;
if (0 > fpm_trace_get_long(opline + offsetof(struct _zend_op, lineno), &l)) {
return -1;
}
lineno = *lu;
}
break;
}
if (0 > fpm_trace_get_long(prev + offsetof(zend_execute_data, prev_execute_data), &l)) {
return -1;
}
prev = l;
}
fprintf(slowlog, " %s:%u\n", *buf ? buf : "unknown", lineno);
if (0 == --callers_limit) {
break;
}
}
return 0;
}
/* }}} */
void fpm_php_trace(struct fpm_child_s *child) /* {{{ */
{
fpm_scoreboard_update(0, 0, 0, 0, 0, 0, 1, FPM_SCOREBOARD_ACTION_INC, child->wp->scoreboard);
FILE *slowlog;
zlog(ZLOG_NOTICE, "about to trace %d", (int) child->pid);
slowlog = fopen(child->wp->config->slowlog, "a+");
if (!slowlog) {
zlog(ZLOG_SYSERROR, "unable to open slowlog (%s)", child->wp->config->slowlog);
goto done0;
}
if (0 > fpm_trace_ready(child->pid)) {
goto done1;
}
if (0 > fpm_php_trace_dump(child, slowlog)) {
fprintf(slowlog, "+++ dump failed\n");
}
if (0 > fpm_trace_close(child->pid)) {
goto done1;
}
done1:
fclose(slowlog);
done0:
fpm_pctl_kill(child->pid, FPM_PCTL_CONT);
child->tracer = 0;
zlog(ZLOG_NOTICE, "finished trace of %d", (int) child->pid);
}
/* }}} */
#endif
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