my_debug.c
cat my_debug.c
#include "my_debug.h"
#define MY_DEBUG_FILE_PATH1 "/usr/local/nginx_sendfile/sbin/trace.txt"
#define MY_DEBUG_FILE_PATH "/data/haoning/mygit/mynginxmodule/nginx_release/debug/my_debug.log"
int _flag=0;
#define open_my_debug_file() \
(my_debug_fd=fopen(MY_DEBUG_FILE_PATH,"a"))
#define close_my_debug_file() \
do { \
if (NULL != my_debug_fd) { \
fclose(my_debug_fd); \
} \
}while(0)
#define my_debug_print(args,fmt...) \
do{ \
if (0 == _flag) { \
break; \
} \
if (NULL == my_debug_fd && NULL == open_my_debug_file()) { \
printf("Err: can not open output file.\n"); \
break; \
} \
fprintf(my_debug_fd,args,##fmt); \
fflush(my_debug_fd); \
}while(0)
void enable_my_debug( void )
{
_flag = 1;
}
void disable_my_debug( void )
{
_flag = 0;
}
int get_my_debug_flag( void )
{
return _flag;
}
void set_my_debug_flag( int flag )
{
_flag = flag;
}
void main_constructor( void )
{
//do nothing
}
void main_destructor( void )
{
close_my_debug_file();
}
void __cyg_profile_func_enter( void *this,void *call )
{
my_debug_print("enter\n%p\n%p\n",call,this);
}
void __cyg_profile_func_exit( void *this,void *call )
{
my_debug_print("exit\n%p\n%p\n",call,this);
}
my_debug.h
#ifndef MY_DEBUG_LENKY_H #define MY_DEBUG_LENKY_H #includevoid enable_my_debug( void ) __attribute__((no_instrument_function)); void disable_my_debug( void ) __attribute__((no_instrument_function)); int get_my_debug_flag( void ) __attribute__((no_instrument_function)); void set_my_debug_flag( int ) __attribute__((no_instrument_function)); void main_constructor( void ) __attribute__((no_instrument_function,constructor)); void main_destructor( void ) __attribute__((no_instrument_function,destructor)); void __cyg_profile_func_enter( void *,void * ) __attribute__((no_instrument_function)); void __cyg_profile_func_exit( void *,void * ) __attribute__((no_instrument_function)); #ifndef MY_DEBUG_MAIN extern FILE *my_debug_fd; #else FILE *my_debug_fd; #endif #endif
cp my_debug.c my_debug.h ../nginx-1.5.6/src/core/
vim ../nginx-1.5.6/src/core/nginx.c
11 #include12 #include "my_debug.h" ..... 204 main(int argc, char *const *argv) 205 { 206 enable_my_debug();
configure之后修改objs/Makefile
CFLAGS = -pipe -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g -finstrument-functions ... 18 CORE_DEPS = src/core/nginx.h \ 19 src/core/my_debug.h \ ..... 84 HTTP_DEPS = src/http/ngx_http.h \ 85 src/core/my_debug.h \ .... 105 objs/nginx: objs/src/core/nginx.o \ 106 objs/src/core/my_debug.o \ ...... 216 $(LINK) -o objs/nginx \ 217 objs/src/core/nginx.o \ 218 objs/src/core/my_debug.o \ ...... 331 objs/src/core/my_debug.o: $(CORE_DEPS) src/core/my_debug.c 332 $(CC) -c $(CFLAGS) $(CORE_INCS) \ 333 -o objs/src/core/my_debug.o \ 334 src/core/my_debug.c
make &&make install 之后
启动
./nginx
得到
/data/haoning/mygit/mynginxmodule/nginx_release/debug/my_debug.log
编写处理脚本
addr2line.sh
#!/bin/sh
if [ $# != 3 ]; then
echo 'Usage: addr2line.sh executefile addressfile functionfile'
exit;
fi;
echo "begin"
cat $2 |while read line
do
if [ "$line" = 'enter' ]; then
read line1
read line2
# echo $line >> $3
addr2line -e $1 -f $line1 -s >>$3
echo "--->" >> $3
addr2line -e $1 -f $line2 -s | sed 's/^/ /' >> $3
echo >> $3
elif [ "$line" = 'exit' ]; then
read line1
read line2
addr2line -e $1 -f $line2 -s | sed 's/^/ /' >> $3
echo "<---" >> $3
addr2line -e $1 -f $line1 -s >> $3
# echo $line >> $3
echo >> $3
fi;
done
echo "end"
./addr2line.sh /usr/local/nginx_sendfile/sbin/nginx my_debug.log a.log
生成a.log为所要的结果
类似如下
main nginx.c:216 ---> ngx_strerror_init ngx_errno.c:47 ngx_strerror_init ngx_errno.c:47 <--- main nginx.c:216 ?? ??:0 ---> main nginx.c:205 main nginx.c:205 <--- ?? ??:0 main nginx.c:280 ---> ngx_time_init ngx_times.c:61 ngx_time_init ngx_times.c:69 ---> ngx_time_update ngx_times.c:75 ngx_time_update ngx_times.c:116 ---> ngx_gmtime ngx_times.c:284 ngx_gmtime ngx_times.c:284 <--- ngx_time_update ngx_times.c:116
附件中a.log.jpg 重命名为a.log查看具体内容