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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <signal.h>
  4.  
  5. int index = 0;
  6. int max_size = 5;
  7. void **mem = NULL;
  8.  
  9. void *newmem(size_t size) {
  10. 	void *temp = malloc(size), **temp2;
  11. 	int i;
  12. 	if (temp == NULL) {
  13. 		exit(EXIT_FAILURE);
  14. 	}
  15. 	if (mem == NULL) {
  16. 		mem = (void**)malloc(max_size * sizeof(void*));
  17. 		if (mem == NULL) {
  18. 			exit(EXIT_FAILURE);
  19. 		}
  20. 	}
  21. 	mem[index++] = temp;
  22. 	if (index >= max_size) {
  23. 		temp2 = (void**)realloc(mem, (max_size + 5) * sizeof(void*));
  24. 		if (temp2 == NULL) {
  25. 			exit(EXIT_FAILURE);
  26. 		}
  27. 		mem = temp2;
  28. 		max_size += 5;
  29. 	}
  30. 	puts("alloc!");
  31. 	return temp;
  32. }
  33.  
  34. void releasemem(void) {
  35. 	int i;
  36. 	if (mem == NULL) {
  37. 		return;
  38. 	}
  39. 	for (i = 0; i < index; i++) {
  40. 		if (mem[i] != NULL) {
  41. 			printf("%d ", *(int*)mem[i]);
  42. 			free(mem[i]);
  43. 			mem[i] = NULL;
  44. 			puts("free!");
  45. 		}
  46. 	}
  47. 	free(mem);
  48. 	index = 0;
  49. 	mem = NULL;
  50. }
  51.  
  52. void foo() {
  53. 	puts("abort");
  54. 	abort();
  55. }
  56.  
  57. void bar() {
  58. 	puts("exit failure");
  59. 	exit(EXIT_FAILURE);
  60. }
  61.  
  62. void baz() {
  63. 	puts("exit success");
  64. 	exit(EXIT_SUCCESS);
  65. }
  66.  
  67.  
  68. int main(void) {
  69. 	int i, *p;
  70.  
  71. 	atexit(releasemem);
  72. 	signal(SIGABRT, releasemem);
  73.  
  74. 	for (i = 0; i < 15; i++) {
  75. 		p = (int*)newmem(sizeof(int));
  76. 		*p = i;
  77. 	}
  78.  
  79. 	i = getchar();
  80. 	if (i == '1') {
  81. 		foo();
  82. 	} else if (i == '2') {
  83. 		bar();
  84. 	} else if (i == '3') {
  85. 		baz();
  86. 	}
  87.  
  88. 	puts("finish");
  89. 	return 0;
  90. }
  91.  
Runtime error #stdin #stdout 0s 2188KB
comments (?)
stdin
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1
stdout
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alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
alloc!
abort
0 free!
1 free!
2 free!
3 free!
4 free!
5 free!
6 free!
7 free!
8 free!
9 free!
10 free!
11 free!
12 free!
13 free!
14 free!
https://ideone.com/eIBkjJ
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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