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As detailed in PR11157, the use of '__block' is known to interfere
with keywords in some environments, such as the Clang -fblocks extension.
Recently a similar issue was raised concerning the use of '__unused'
and a '__glibc' prefix was proposed to create a glibc implementation
namespace for these sorts of issues [1]. This patches takes that
approach.
[1] https://sourceware.org/ml/libc-alpha/2012-02/msg00047.html
[2] http://lists.debian.org/debian-glibc/2013/11/msg00020.html
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To make malloc code more maintainable we make malloc and pvalloc share
logic with memalign.
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A very large alignment argument passed to mealign/posix_memalign
causes _int_memalign to enter an infinite loop. Limit the maximum
alignment value to the maximum representable power of two to
prevent this from happening.
Changelog:
2013-10-30 Will Newton <will.newton@linaro.org>
[BZ #16038]
* malloc/hooks.c (memalign_check): Limit alignment to the
maximum representable power of two.
* malloc/malloc.c (__libc_memalign): Likewise.
* malloc/tst-memalign.c (do_test): Add test for very
large alignment values.
* malloc/tst-posix_memalign.c (do_test): Likewise.
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Autoconf has been deprecating configure.in for quite a long time.
Rename all our configure.in and preconfigure.in files to .ac.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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A large value of bytes passed to memalign_check can cause an integer
overflow in _int_memalign and heap corruption. This issue can be
exposed by running tst-memalign with MALLOC_CHECK_=3.
ChangeLog:
2013-10-10 Will Newton <will.newton@linaro.org>
* malloc/hooks.c (memalign_check): Ensure the value of bytes
passed to _int_memalign does not overflow.
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Add some comments and call free on all potentially allocated pointers.
Also remove duplicate check for NULL pointer.
ChangeLog:
2013-10-04 Will Newton <will.newton@linaro.org>
* malloc/tst-valloc.c: Add comments.
(do_test): Add comments and call free on all potentially
allocated pointers. Remove duplicate check for NULL pointer.
Add space after cast.
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Add some comments and call free on all potentially allocated pointers.
Also remove duplicate check for NULL pointer.
ChangeLog:
2013-10-04 Will Newton <will.newton@linaro.org>
* malloc/tst-pvalloc.c: Add comments.
(do_test): Add comments and call free on all potentially
allocated pointers. Remove duplicate check for NULL pointer.
Add space after cast.
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Add some comments and call free on all potentially allocated pointers.
ChangeLog:
2013-10-04 Will Newton <will.newton@linaro.org>
* malloc/tst-posix_memalign.c: Add comments.
(do_test): Add comments and call free on all potentially
allocated pointers. Add space after cast.
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ChangeLog:
2013-10-04 Will Newton <will.newton@linaro.org>
* malloc/Makefile: Add tst-memalign.
* malloc/tst-memalign.c: New file.
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ChangeLog:
2013-10-02 Will Newton <will.newton@linaro.org>
* malloc/Makefile: Add tst-pvalloc.
* malloc/tst-pvalloc.c: New file.
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ChangeLog:
2013-10-02 Will Newton <will.newton@linaro.org>
* malloc/tst-valloc.c: Rewrite to use test-skeleton.c and
improve test coverage.
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ChangeLog:
2013-10-02 Will Newton <will.newton@linaro.org>
* malloc/Makefile: Add tst-posix_memalign.
* malloc/tst-posix_memalign.c: New file.
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for ChangeLog
* malloc/arena.c (new_heap): New memory_heap_new probe.
(grow_heap): New memory_heap_more probe.
(shrink_heap): New memory_heap_less probe.
(heap_trim): New memory_heap_free probe.
* malloc/malloc.c (sysmalloc): New memory_sbrk_more probe.
(systrim): New memory_sbrk_less probe.
* manual/probes.texi: Document them.
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for ChangeLog
* malloc/arena.c (arena_get_retry): Add memory_arena_retry probe.
* manual/probes.texi: Document it.
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for ChangeLog
* malloc/malloc.c (__libc_malloc): Add memory_malloc_retry probe.
(__libc_realloc): Add memory_realloc_retry probe.
(__libc_memalign): Add memory_memalign_retry probe.
(__libc_valloc): Add memory_valloc_retry probe.
(__libc_pvalloc): Add memory_pvalloc_retry probe.
(__libc_calloc): Add memory_calloc_retry probe.
* manual/probes.texi: Document them.
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for ChangeLog
* malloc/arena.c (get_free_list): Add probe
memory_arena_reuse_free_list.
(reused_arena) [PER_THREAD]: Add probes memory_arena_reuse_wait
and memory_arena_reuse.
(arena_get2) [!PER_THREAD]: Likewise.
* malloc/malloc.c (__libc_realloc) [!PER_THREAD]: Add probe
memory_arena_reuse_realloc.
* manual/probes.texi: Document them.
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for ChangeLog
* malloc/malloc.c (__libc_free): Add
memory_mallopt_free_dyn_thresholds probe.
(__libc_mallopt): Add multiple memory_mallopt probes.
* manual/probes.texi: Document them.
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for ChangeLog
* malloc/malloc.c: Include stap-probe.h.
(__libc_mallopt): Add memory_mallopt probe.
* malloc/arena.c (_int_new_arena): Add memory_arena_new probe.
* manual/probes.texi: New.
* manual/Makefile (chapters): Add probes.
* manual/threads.texi: Set next node.
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A large bytes parameter to memalign could cause an integer overflow
and corrupt allocator internals. Check the overflow does not occur
before continuing with the allocation.
ChangeLog:
2013-09-11 Will Newton <will.newton@linaro.org>
[BZ #15857]
* malloc/malloc.c (__libc_memalign): Check the value of bytes
does not overflow.
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A large bytes parameter to valloc could cause an integer overflow
and corrupt allocator internals. Check the overflow does not occur
before continuing with the allocation.
ChangeLog:
2013-09-11 Will Newton <will.newton@linaro.org>
[BZ #15856]
* malloc/malloc.c (__libc_valloc): Check the value of bytes
does not overflow.
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A large bytes parameter to pvalloc could cause an integer overflow
and corrupt allocator internals. Check the overflow does not occur
before continuing with the allocation.
ChangeLog:
2013-09-11 Will Newton <will.newton@linaro.org>
[BZ #15855]
* malloc/malloc.c (__libc_pvalloc): Check the value of bytes
does not overflow.
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The current tests don't test the functionality of realloc in detail.
Add a new test for realloc that exercises some of the corner cases
that are not otherwise tested.
ChangeLog:
2013-09-09 Will Newton <will.newton@linaro.org>
* malloc/Makefile: Add tst-realloc to tests.
* malloc/tst-realloc.c: New file.
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it is impossible to create an alias of a common symbol (as
compat_symbol does), because common symbols do not have a section or
an offset until linked. GNU as tolerates aliases of common symbols by
simply creating another common symbol, but other assemblers (notably
LLVM's integrated assembler) are less tolerant.
2013-05-15 Peter Collingbourne <pcc@google.com>
* malloc/obstack.c (_obstack_compat): Add initializer.
-
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in utilities.
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[BZ #15160]
Draw graphs for heap and stack only if MAXSIZE_HEAP and MAXSIZE_STACK
are non-zero.
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Introduce (only on Linux) and use a HAVE_MREMAP symbol to advertize mremap
availability.
Move the malloc-sysdep.h include from arena.c to malloc.c, since what is
provided by malloc-sysdep.h is needed earlier in malloc.c, before the inclusion
of arena.c.
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* catgets/gencat.c: Update copyright year.
* csu/version.c: Likewise.
* debug/catchsegv.sh: Likewise.
* debug/pcprofiledump.c: Likewise.
* debug/xtrace.sh: Likewise.
* elf/ldconfig.c: Likewise.
* elf/ldd.bash.in: Likewise.
* elf/pldd.c: Likewise.
* elf/sotruss.ksh: Likewise.
* elf/sprof.c: Likewise.
* iconv/iconv_prog.c: Likewise.
* iconv/iconvconfig.c: Likewise.
* locale/programs/locale.c: Likewise.
* locale/programs/localedef.c: Likewise.
* login/programs/pt_chown.c: Likewise.
* malloc/memusage.sh: Likewise.
* malloc/memusagestat.c: Likewise.
* malloc/mtrace.pl: Likewise.
* nscd/nscd.c: Likewise.
* nss/getent.c: Likewise.
* nss/makedb.c: Likewise.
* posix/getconf.c: Likewise.
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fclose will call free, invoking its hook, then fprintf which would indirectly
try to allocate a buffer, and this can cause malloc to be used (thus its hook
to be invoked) if libio uses malloc instead of mmap; given any malloc/free hook
locks the internal lock, this leads to a deadlock.
To prevent this hook roundtrip at muntrace, first unset MALLSTREAM and the
hooks, and only after that close the trace file.
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