1 /* Copyright (c) 2012-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/Exception.hpp"
8 #include "xbt/mmalloc.h"
18 XBT_LOG_NEW_DEFAULT_CATEGORY(test,"this test");
20 #define BUFFSIZE 204800
22 #define size_of_block(i) (((i % 50)+1)* 100)
24 static void check_block(const void* s, int c, int n)
26 const unsigned char* p = static_cast<const unsigned char*>(s);
27 unsigned char b = static_cast<unsigned char>(c);
28 for (int i = 0; i < n; i++)
30 xbt_die("value mismatch: %p[%d] = %#hhx, expected %#hhx", p, i, p[i], b);
33 int main(int argc, char**argv)
35 xbt_mheap_t heapA = nullptr;
36 void *pointers[TESTSIZE];
39 XBT_INFO("Allocating a new heap");
40 unsigned long mask = ~((unsigned long)xbt_pagesize - 1);
41 void *addr = (void*)(((unsigned long)sbrk(0) + BUFFSIZE) & mask);
42 heapA = xbt_mheap_new(-1, addr);
44 perror("attach 1 failed");
45 fprintf(stderr, "bye\n");
49 XBT_INFO("HeapA allocated");
53 for (i = 0; i < TESTSIZE; i++) {
54 size = size_of_block(i);
55 pointers[i] = mmalloc(heapA, size);
56 XBT_INFO("%d bytes allocated with offset %zx", size, (size_t)((char*)pointers[i] - (char*)heapA));
58 XBT_INFO("All blocks were correctly allocated. Free every second block");
59 for (i = 0; i < TESTSIZE; i+=2) {
60 mfree(heapA, pointers[i]);
62 XBT_INFO("Memset every second block to zero (yeah, they are not currently allocated :)");
63 for (i = 0; i < TESTSIZE; i+=2) {
64 size = size_of_block(i);
65 memset(pointers[i],0, size);
67 XBT_INFO("Re-allocate every second block");
68 for (i = 0; i < TESTSIZE; i+=2) {
69 size = size_of_block(i);
70 pointers[i] = mmalloc(heapA, size);
73 XBT_INFO("free all blocks (each one twice, to check that double free are correctly catched)");
74 for (i = 0; i < TESTSIZE; i++) {
76 mfree(heapA, pointers[i]);
78 mfree(heapA, pointers[i]);
83 xbt_die("FAIL: A double-free went undetected (for size:%d)",size_of_block(i));
86 XBT_INFO("free again all blocks (to really check that double free are correctly catched)");
87 for (i = 0; i < TESTSIZE; i++) {
90 mfree(heapA, pointers[i]);
95 xbt_die("FAIL: A double-free went undetected (for size:%d)",size_of_block(i));
98 XBT_INFO("Let's try different codepaths for mrealloc");
99 for (i = 0; i < TESTSIZE; i++) {
100 const std::vector<std::pair<int, int>> requests = {
101 {size_of_block(i) / 2, 0x77}, {size_of_block(i) * 2, 0xaa}, {1, 0xc0}, {0, 0}};
102 pointers[i] = nullptr;
103 for (unsigned k = 0; k < requests.size(); ++k) {
104 size = requests[k].first;
105 pointers[i] = mrealloc(heapA, pointers[i], size);
107 check_block(pointers[i], requests[k - 1].second, std::min(size, requests[k - 1].first));
109 memset(pointers[i], requests[k].second, size);
113 XBT_INFO("Damnit, I cannot break mmalloc this time. That's SO disappointing.");