<分区>
我遇到了段错误，我已将其缩小为回调函数中的 for 循环。很奇怪，因为该程序以前可以运行，现在不行了!
struct debuggerth_command debuggerth_protocol[] = { /*
* Note: These strings are NOT null-terminated. The
* strings are 4 bytes long for memory alignment and
* integer-cast comparisons.
*/
{ "run ", debuggerth_startprocess },
{ "stop", 0 },
{ "inp ", 0 },
{ "sig ", 0 },
{ 0, 0 }
};
这是代码:
int debuggerth_callback (struct libwebsocket_context * context,
struct libwebsocket * wsi,
enum libwebsocket_callback_reasons reason,
void * user,
void * in,
size_t len){
switch (reason) {
case LWS_CALLBACK_RECEIVE:
if (len < 4){
/* send error */
return -1;
}
/* Getting a segmentation fault
* within this loop.
*/
// I used this break to determine where the seg fault starts
// break
int i = 0;
for (; debuggerth_protocol[i].cmd; i++)
if (cmpcmd (debuggerth_protocol[i].cmd, in)) break;
//break;
if (!debuggerth_protocol[i].cmd){
int byteswritten = sprintf
(debuggerth_message,
debuggerth_format,
debuggerth_headers[0],
debuggerth_errors [0]);
libwebsocket_write (wsi, debuggerth_message,
byteswritten,
LWS_WRITE_TEXT);
return -1;
}
break;
这是字符串比较宏:
#define cmpcmd(cmd, str) ((*(int*)(cmd)) == (*(int*)(str)))
有人有什么想法吗？