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profan/allocs.c

Last active Dec 5, 2020
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awful allocation tracking macro
#include <stdlib.h>
#include <stdio.h>
struct Node {
size_t attempted_allocations;
size_t successful_allocations;
size_t size;
struct Node* next;
const char* file;
size_t line;
};
static struct Node *head = NULL;
#define COMBINE(x, y) x ## y
#define EVAL(x, y) COMBINE(x, y)
#define NAME node
#define ALLOC(MEM, SZ) \
static struct Node EVAL(NAME, __LINE__); \
if (!EVAL(NAME, __LINE__).next) { \
EVAL(NAME, __LINE__).line = __LINE__; \
EVAL(NAME, __LINE__).file = __FILE__; \
} \
if (head && !EVAL(NAME, __LINE__).next) { \
struct Node* last = head; \
head = &EVAL(NAME, __LINE__); \
head->next = last; \
} \
if (!head) head = &EVAL(NAME, __LINE__); \
MEM = malloc(SZ); \
EVAL(NAME, __LINE__).attempted_allocations += 1; \
if (MEM) { \
EVAL(NAME, __LINE__).successful_allocations += 1; \
EVAL(NAME, __LINE__).size += SZ; \
} \
void do_thing() {
void *other_mem;
ALLOC(other_mem, 1024)
}
int main(int argc, char **argv) {
void *mem;
ALLOC(mem, 2048)
ALLOC(mem, 1024000000000000000)
do_thing();
do_thing();
struct Node *cur;
printf("allocations: \n");
for (cur = head; cur != NULL; cur = cur->next) {
printf("allocation - attempted num: %zu, successful num: %zu, size: %zu, line: %zu, file: %s\n",
cur->attempted_allocations, cur->successful_allocations, cur->size, cur->line, cur->file);
}
return 0;
}
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