根據函式地址查詢函式名稱，或根據函式名稱查詢函式地址的實現
阿新 • • 發佈：2021-08-24
linux平臺上查問題時，定位到出錯的函式地址，但無法知道是哪個模組的函式，記錄如下函式可實現：
int getFuncAddrByName(char *funcName, unsigned int nameLen)
{
void *handle = NULL;
void *iptr = NULL;
/* open the needed object */
handle = dlopen(NULL, RTLD_LOCAL | RTLD_LAZY);
if(handle == NULL)
{
return NULL;
}
/* find the address of function and data objects */
iptr = dlsym(handle, funcName);
dlclose(handle);
if(iptr == NULL)
{
return NULL;
}
return (int)iptr;
}
int getFuncNameByAddr (FUNCPTR funcAddr, char *funcName, unsigned int funcNameLen)
{
void *handle = NULL;
Dl_info dl;
int ret = 0;
/* open the needed object */
handle = dlopen(NULL, RTLD_LOCAL | RTLD_LAZY);
if(handle == NULL)
{
return -1;
}
/* find the address of function and data objects */
ret = dladdr (funcAddr, &dl);
dlclose(handle);
if(ret == 0)
{
return -1;
}
strncpy(funcName, dl.dli_sname, funcNameLen - 1);
return 0;
}