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malloc/tst-obstack.c
66 строк
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Martin Sebor
Avoid -Wuse-after-free in tests [BZ #26779].
26 янв 2022, 20:38
26 янв 2022, 20:38
c094c23
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#include <obstack.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #define obstack_chunk_alloc verbose_malloc #define obstack_chunk_free verbose_free #define ALIGN_BOUNDARY 64 #define ALIGN_MASK (ALIGN_BOUNDARY - 1) #define OBJECT_SIZE 1000 static void * verbose_malloc (size_t size) { void *buf = malloc (size); printf ("malloc (%zu) => %p\n", size, buf); return buf; } static void verbose_free (void *buf) { printf ("free (%p)\n", buf); free (buf); } static int do_test (void) { int result = 0; int align = 2; while (align <= 64) { struct obstack obs; int i; int align_mask = align - 1; printf ("\n Alignment mask: %d\n", align_mask); obstack_init (&obs); obstack_alignment_mask (&obs) = align_mask; /* finish an empty object to take alignment into account */ obstack_finish (&obs); /* let's allocate some objects and print their addresses */ for (i = 15; i > 0; --i) { void *obj = obstack_alloc (&obs, OBJECT_SIZE); printf ("obstack_alloc (%u) => %p \t%s\n", OBJECT_SIZE, obj, ((uintptr_t) obj & align_mask) ? "(not aligned)" : ""); result |= ((uintptr_t) obj & align_mask) != 0; } /* clean up */ obstack_free (&obs, 0); align <<= 1; } return result; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"