https://bugs.kde.org/show_bug.cgi?id=217695
Mark Wielaard <m...@klomp.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Mark Wielaard <m...@klomp.org> ---
commit 1c9a0bf58a47e855e6e5bf78a30bcee0af835804
Author: Mark Wielaard <m...@klomp.org>
Date: Fri Feb 12 23:29:34 2021 +0100
PR217695 malloc/calloc/realloc/memalign failure doesn't set errno to ENOMEM
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
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