定位问题：*** glibc detected *** : double free or corruption (!prev): 0x09b077d8

定位free/malloc的位置和参数，可以在对应的.cpp/.h文件中添加：

 

 #include <stdio.h>
 #include <stdlib.h>



 void *
 debug_malloc(size_t size, const char *file, int line, const char *func)
 {
         void *p;

         p = malloc(size);
         printf("%s:%d:%s:malloc(%ld): p=0x%lx\n",
             file, line, func, size, (unsigned long)p);
         return p;
 }

 #define malloc(s) debug_malloc(s, __FILE__, __LINE__, __func__)
 #define free(p)  do {                                                   \
         printf("%s:%d:%s:free(0x%lx)\n", __FILE__, __LINE__,            \
             __func__, (unsigned long)p);                                \
         free(p);                                                        \
 } while (0)

 int
 main(int argc, char *argv[])
 {
         char *p;
         p = malloc(1024);
         free(p);
         return 0;
 }

 

延伸一下，如果想在不改动原来代码的情况下跳过这个错误，则可以将上述代码再重新改写一下：

#define malloc(s) debug_malloc(s, __FILE__, __LINE__, __func__)
#define free(p)  do {                                                                                   \
        printf("%s:%d:%s:free(0x%lx)\n", __FILE__, __LINE__,            \
            __func__, (unsigned long)p);                                                       \

        if (p) {                                                                                                     \
          free(p);                                                                                                 \

          p = NULL;                                                                                           \

       }                                                                                                               \ 
} while (0)