Viewing file:  pr97461.c (1.59 KB) -rw-r--r--
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/* PR gcov-profile/97461 */
/* { dg-options "-O2 -ldl -fprofile-correction" } */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int malloc_depth = 0;
static char memory[128* 1024];
static size_t memory_p = 0;
void f1(void) {}
void f2(void) {}
typedef void (*fun_t)(void);
static const fun_t funs[2] = { f1, f2, };
static void * malloc_impl(size_t size) {
void * r = &memory[memory_p];
/* The malloc() and calloc() functions return a pointer to the allocated
* memory, which is suitably aligned for any built-in type. Use 16
* bytes here as the basic alignment requirement for user-defined malloc
* and calloc. See PR97594 for the details. */
#define ROUND_UP_FOR_16B_ALIGNMENT(x) ((x + 15) & (-16))
memory_p += ROUND_UP_FOR_16B_ALIGNMENT(size);
// force TOPN profile
funs[size % 2]();
return r;
}
// Override default malloc, check it it get s called recursively
void * malloc(size_t size) {
// Must not be called recursively. Malloc implementation does not support it.
if (malloc_depth != 0) __builtin_trap();
++malloc_depth;
void * r = malloc_impl(size);
--malloc_depth;
return r;
}
// Called from gcov
void *calloc(size_t nmemb, size_t size) {
// Must not be called recursively. Malloc implementation does not support it.
if (malloc_depth != 0) __builtin_trap();
++malloc_depth;
void * r = malloc_impl(size * nmemb);
memset(r, 0, size * nmemb);
--malloc_depth;
return r;
}
void free(void *ptr){}
int main() {
void * p = malloc(8);
return p != 0 ? 0 : 1;
}
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