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dlmalloc_proxy.c
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93 lines (84 loc) · 2.18 KB
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/*
* Copyright 2013 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
// Emscripten tests
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <dlfcn.h>
typedef void *(*mallocer)(int n);
typedef void (*freeer)(void *p);
void *lib_handle;
int handles = 0;
mallocer mallocproxy = NULL;
freeer freeproxy = NULL;
void get_lib() {
//printf("get lib\n");
lib_handle = dlopen("liblib.so", RTLD_NOW);
assert(lib_handle != NULL);
handles++;
mallocproxy = (mallocer)dlsym(lib_handle, "mallocproxy");
assert(mallocproxy!= NULL);
freeproxy = (freeer)dlsym(lib_handle, "freeproxy");
assert(freeproxy!= NULL);
}
void unget_lib() {
//printf("unget lib\n");
assert(lib_handle);
dlclose(lib_handle);
handles--;
if (handles == 0) lib_handle = NULL;
}
int main() {
int n = 0, total = 0, l = 0;
void *allocs[50];
allocs[n++] = malloc(10); // pull in real malloc
for (int i = 0; i < 1000; i++) {
//printf("%d: total ever %d MB, current MB %d, total libs %d\n", i, total, n, l);
assert(n < 50);
if (i % 5 == 0) {
if (handles < 10) {
get_lib();
l++;
}
}
if (i % 7 == 0) {
if (handles > 0) unget_lib();
}
if (i % 3 == 0) {
if (handles > 0) {
if (n < 10) {
if (i % 2 == 0) {
//printf("%d: alloc\n", i);
allocs[n++] = mallocproxy(1024*1024);
} else {
//printf("%d: real alloc\n", i);
allocs[n++] = malloc(1024*1024);
}
total++;
} else {
//printf("real free\n");
free(allocs[--n]); // real free
}
}
}
if (i % 4 == 0) {
if (handles > 0 && n > 0) {
//printf("free\n");
if (i % 2 == 0) {
//printf("free\n");
freeproxy(allocs[--n]);
} else {
//printf("real free\n");
free(allocs[--n]);
}
}
}
}
while (n > 0) free(allocs[--n]); // real free
while (handles > 0) unget_lib();
printf("*%d,%d*\n", total, l);
}