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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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1c9a0bf58a
When one of the allocation functions in vg_replace_malloc failed they return NULL, but didn't set errno. This is slightly tricky since errno is implementation defined and might be a macro. In the case of glibc ernno is defined as: extern int *__errno_location (void) __THROW __attribute__ ((__const__)); #define errno (*__errno_location ()) We can use the same trick as we use for __libc_freeres in coregrind/vg_preloaded.c. Define the function as "weak". This means it will only be defined if another library (glibc in this case) actually provides a definition. Otherwise it will be NULL. So we will only call it if it is defined and one of the allocation functions failed, returned NULL. Include a new linux only memcheck testcase, enomem.vgtest. https://bugs.kde.org/show_bug.cgi?id=217695
35 lines
712 B
C
35 lines
712 B
C
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/* Test malloc, calloc, realloc and memalign set errno to ENOMEM */
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#include <errno.h>
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#include <limits.h>
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#include <malloc.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main ( void )
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{
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char* small = malloc (16);
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char* p;
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errno = 0;
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p = malloc(SSIZE_MAX);
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if (!p && errno == ENOMEM) puts("malloc: Cannot allocate memory");
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errno = 0;
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p = calloc(1, SSIZE_MAX);
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if (!p && errno == ENOMEM) puts("calloc: Cannot allocate memory");
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errno = 0;
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p = realloc(small, SSIZE_MAX);
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if (!p && errno == ENOMEM) puts("realloc: Cannot allocate memory");
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errno = 0;
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p = memalign(64, SSIZE_MAX);
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if (!p && errno == ENOMEM) puts("memalign: Cannot allocate memory");
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free(small);
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return 0;
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}
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