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* malloc: Improve MAP_HUGETLB with glibc.malloc.hugetlb=2Adhemerval Zanella2023-11-291-3/+10
| | | | | | | | | | | | | | | | Even for explicit large page support, allocation might use mmap without the hugepage bit set if the requested size is smaller than mmap_threshold. For this case where mmap is issued, MAP_HUGETLB is set iff the allocation size is larger than the used large page. To force such allocations to use large pages, also tune the mmap_threhold (if it is not explicit set by a tunable). This forces allocation to follow the sbrk path, which will fall back to mmap (which will try large pages before galling back to default mmap). Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
* malloc: Use __get_nprocs on arena_get2 (BZ 30945)Adhemerval Zanella2023-11-221-1/+1
| | | | | | | | | | | | | | | | This restore the 2.33 semantic for arena_get2. It was changed by 11a02b035b46 to avoid arena_get2 call malloc (back when __get_nproc was refactored to use an scratch_buffer - 903bc7dcc2acafc). The __get_nproc was refactored over then and now it also avoid to call malloc. The 11a02b035b46 did not take in consideration any performance implication, which should have been discussed properly. The __get_nprocs_sched is still used as a fallback mechanism if procfs and sysfs is not acessible. Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Decorate malloc mapsAdhemerval Zanella2023-11-072-0/+9
| | | | | | | | | | | | | | | Add anonymous mmap annotations on loader malloc, malloc when it allocates memory with mmap, and on malloc arena. The /proc/self/maps will now print: [anon: glibc: malloc arena] [anon: glibc: malloc] [anon: glibc: loader malloc] On arena allocation, glibc annotates only the read/write mapping. Checked on x86_64-linux-gnu and aarch64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Fix tst-tcfree3 build csky-linux-gnuabiv2 with fortify sourceAdhemerval Zanella2023-10-232-3/+2
| | | | | | | | | | | | | | | | | | | | | | | With gcc 13.1 with --enable-fortify-source=2, tst-tcfree3 fails to build on csky-linux-gnuabiv2 with: ../string/bits/string_fortified.h: In function ‘do_test’: ../string/bits/string_fortified.h:26:8: error: inlining failed in call to ‘always_inline’ ‘memcpy’: target specific option mismatch 26 | __NTH (memcpy (void *__restrict __dest, const void *__restrict __src, | ^~~~~~ ../misc/sys/cdefs.h:81:62: note: in definition of macro ‘__NTH’ 81 | # define __NTH(fct) __attribute__ ((__nothrow__ __LEAF)) fct | ^~~ tst-tcfree3.c:45:3: note: called from here 45 | memcpy (c, a, 32); | ^~~~~~~~~~~~~~~~~ Instead of relying on -O0 to avoid malloc/free to be optimized away, disable the builtin. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Remove bin scanning from memalign (bug 30723)Florian Weimer2023-08-152-166/+10
| | | | | | | | | | | | | | | | | On the test workload (mpv --cache=yes with VP9 video decoding), the bin scanning has a very poor success rate (less than 2%). The tcache scanning has about 50% success rate, so keep that. Update comments in malloc/tst-memalign-2 to indicate the purpose of the tests. Even with the scanning removed, the additional merging opportunities since commit 542b1105852568c3ebc712225ae78b ("malloc: Enable merging of remainders in memalign (bug 30723)") are sufficient to pass the existing large bins test. Remove leftover variables from _int_free from refactoring in the same commit. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Enable merging of remainders in memalign (bug 30723)Florian Weimer2023-08-111-76/+121
| | | | | | | | | | | | | | | | | | | | | Previously, calling _int_free from _int_memalign could put remainders into the tcache or into fastbins, where they are invisible to the low-level allocator. This results in missed merge opportunities because once these freed chunks become available to the low-level allocator, further memalign allocations (even of the same size are) likely obstructing merges. Furthermore, during forwards merging in _int_memalign, do not completely give up when the remainder is too small to serve as a chunk on its own. We can still give it back if it can be merged with the following unused chunk. This makes it more likely that memalign calls in a loop achieve a compact memory layout, independently of initial heap layout. Drop some useless (unsigned long) casts along the way, and tweak the style to more closely match GNU on changed lines. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Fix set-freeres.c with gcc 6Adhemerval Zanella Netto2023-07-261-0/+46
| | | | | | | | | | | | | | | Old GCC might trigger the the comparison will always evaluate as ‘true’ warnig for static build: set-freeres.c:87:14: error: the comparison will always evaluate as ‘true’ for the address of ‘__libc_getgrgid_freemem_ptr’ will never be NULL [-Werror=address] if (&__ptr != NULL) \ So add pragma weak for all affected usages. Checked on x86_64 and i686 with gcc 6 and 13. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* realloc: Limit chunk reuse to only growing requests [BZ #30579]Siddhesh Poyarekar2023-07-061-8/+15
| | | | | | | | | | | | | | | | | | | | | The trim_threshold is too aggressive a heuristic to decide if chunk reuse is OK for reallocated memory; for repeated small, shrinking allocations it leads to internal fragmentation and for repeated larger allocations that fragmentation may blow up even worse due to the dynamic nature of the threshold. Limit reuse only when it is within the alignment padding, which is 2 * size_t for heap allocations and a page size for mmapped allocations. There's the added wrinkle of THP, but this fix ignores it for now, pessimizing that case in favor of keeping fragmentation low. This resolves BZ #30579. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reported-by: Nicolas Dusart <nicolas@freedelity.be> Reported-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Tested-by: Aurelien Jarno <aurelien@aurel32.net>
* malloc: Decrease resource usage for malloc testsAdhemerval Zanella Netto2023-06-121-12/+11
| | | | | | | | | | | | | | | | | | | | | | The tst-mallocfork2 and tst-mallocfork3 create large number of subprocesss, around 11k for former and 20k for latter, to check for malloc async-signal-safeness on both fork and _Fork. However they do not really exercise allocation patterns different than other tests fro malloc itself, and the spawned process just exit without any extra computation. The tst-malloc-tcache-leak is similar, but creates 100k threads and already checks the resulting with mallinfo. These tests are also very sensitive to system load (since they estresss heavy the kernel resource allocation), and adding them on THP tunable and mcheck tests increase the pressure even more. For THP the fork tests do not add any more coverage than other tests. The mcheck is also not enable for tst-malloc-tcache-leak. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Move {read,write}_all functions to a dedicated headerFrédéric Bérat2023-06-062-60/+2
| | | | | | | | Since these functions are used in both catgets/gencat.c and malloc/memusage{,stat}.c, it make sense to move them into a dedicated header where they can be inlined. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Fix a few more typos I missed in previous round -- BZ 25337Paul Pluzhnikov2023-06-021-1/+1
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* Fix all the remaining misspellings -- BZ 25337Paul Pluzhnikov2023-06-026-14/+14
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* malloc/{memusage.c, memusagestat.c}: fix warn unused resultFrédéric Bérat2023-06-012-16/+86
| | | | | | Fix unused result warnings, detected when _FORTIFY_SOURCE is enabled in glibc. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* aligned_alloc: conform to C17DJ Delorie2023-05-085-6/+116
| | | | | | | This patch adds the strict checking for power-of-two alignments in aligned_alloc(), and updates the manual accordingly. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* malloc: Really fix tst-memalign-3 link against threadsSamuel Thibault2023-05-021-1/+2
| | | | All the tst malloc variants need the thread linking flags.
* malloc: Fix tst-memalign-3 link against threadsSamuel Thibault2023-05-021-0/+1
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* malloc: Add missing shared thread library flagsAdhemerval Zanella2023-04-201-0/+1
| | | | So tst-memalign-3 builds on Hurd.
* malloc: set NON_MAIN_ARENA flag for reclaimed memalign chunk (BZ #30101)DJ Delorie2023-04-184-82/+268
| | | | | | | | | | | | | | | | | | | | | | | | | | | Based on these comments in malloc.c: size field is or'ed with NON_MAIN_ARENA if the chunk was obtained from a non-main arena. This is only set immediately before handing the chunk to the user, if necessary. The NON_MAIN_ARENA flag is never set for unsorted chunks, so it does not have to be taken into account in size comparisons. When we pull a chunk off the unsorted list (or any list) we need to make sure that flag is set properly before returning the chunk. Use the rounded-up size for chunk_ok_for_memalign() Do not scan the arena for reusable chunks if there's no arena. Account for chunk overhead when determining if a chunk is a reuse candidate. mcheck interferes with memalign, so skip mcheck variants of memalign tests. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* malloc: Only set pragma weak for rpc freemem if requiredAdhemerval Zanella2023-04-051-2/+4
| | | | | Both __rpc_freemem and __rpc_thread_destroy are only used if the the compat symbols are required.
* memalign: Support scanning for aligned chunks.DJ Delorie2023-03-293-28/+390
| | | | | | | | | | | | | | | | This patch adds a chunk scanning algorithm to the _int_memalign code path that reduces heap fragmentation by reusing already aligned chunks instead of always looking for chunks of larger sizes and splitting them. The tcache macros are extended to allow removing a chunk from the middle of the list. The goal is to fix the pathological use cases where heaps grow continuously in workloads that are heavy users of memalign. Note that tst-memalign-2 checks for tcache operation, which malloc-check bypasses. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* malloc: Use C11 atomics on memusageAdhemerval Zanella2023-03-291-82/+111
| | | | | | Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
* Remove --enable-tunables configure optionAdhemerval Zanella Netto2023-03-294-137/+5
| | | | | | | | | | | | And make always supported. The configure option was added on glibc 2.25 and some features require it (such as hwcap mask, huge pages support, and lock elisition tuning). It also simplifies the build permutations. Changes from v1: * Remove glibc.rtld.dynamic_sort changes, it is orthogonal and needs more discussion. * Cleanup more code. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Remove --disable-experimental-malloc optionAdhemerval Zanella2023-03-291-4/+0
| | | | | | | | | | | | | | | | | | | It is the default since 2.26 and it has bitrotten over the years, By using it multiple malloc tests fails: FAIL: malloc/tst-memalign-2 FAIL: malloc/tst-memalign-2-malloc-hugetlb1 FAIL: malloc/tst-memalign-2-malloc-hugetlb2 FAIL: malloc/tst-memalign-2-mcheck FAIL: malloc/tst-mxfast-malloc-hugetlb1 FAIL: malloc/tst-mxfast-malloc-hugetlb2 FAIL: malloc/tst-tcfree2 FAIL: malloc/tst-tcfree2-malloc-hugetlb1 FAIL: malloc/tst-tcfree2-malloc-hugetlb2 Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
* Allow building with --disable-nscd againFlavio Cruz2023-03-281-0/+6
| | | | | The change 88677348b4de breaks the build with undefiend references to the NSCD functions.
* Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functionsAdhemerval Zanella Netto2023-03-272-29/+136
| | | | | | | | | | | | | | | | | | | | They are both used by __libc_freeres to free all library malloc allocated resources to help tooling like mtrace or valgrind with memory leak tracking. The current scheme uses assembly markers and linker script entries to consolidate the free routine function pointers in the RELRO segment and to be freed buffers in BSS. This patch changes it to use specific free functions for libc_freeres_ptrs buffers and call the function pointer array directly with call_function_static_weak. It allows the removal of both the internal macros and the linker script sections. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* malloc: Fix transposed arguments in sysmalloc_mmap_fallback callRobert Morell2023-03-081-2/+2
| | | | | | | | | | | | git commit 0849eed45daa ("malloc: Move MORECORE fallback mmap to sysmalloc_mmap_fallback") moved a block of code from sysmalloc to a new helper function sysmalloc_mmap_fallback(), but 'pagesize' is used for the 'minsize' argument and 'MMAP_AS_MORECORE_SIZE' for the 'pagesize' argument. Fixes: 0849eed45daa ("malloc: Move MORECORE fallback mmap to sysmalloc_mmap_fallback") Signed-off-by: Robert Morell <rmorell@nvidia.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* malloc: remove redundant check of unsorted bin corruptionAyush Mittal2023-02-221-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | * malloc/malloc.c (_int_malloc): remove redundant check of unsorted bin corruption With commit "b90ddd08f6dd688e651df9ee89ca3a69ff88cd0c" (malloc: Additional checks for unsorted bin integrity), same check of (bck->fd != victim) is added before checking of unsorted chunk corruption, which was added in "bdc3009b8ff0effdbbfb05eb6b10966753cbf9b8" (Added check before removing from unsorted list). .. 3773 if (__glibc_unlikely (bck->fd != victim) 3774 || __glibc_unlikely (victim->fd != unsorted_chunks (av))) 3775 malloc_printerr ("malloc(): unsorted double linked list corrupted"); .. .. 3815 /* remove from unsorted list */ 3816 if (__glibc_unlikely (bck->fd != victim)) 3817 malloc_printerr ("malloc(): corrupted unsorted chunks 3"); 3818 unsorted_chunks (av)->bk = bck; .. So this extra check can be removed. Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Ayush Mittal <ayush.m@samsung.com> Reviewed-by: DJ Delorie <dj@redhat.com>
* Update copyright dates not handled by scripts/update-copyrightsJoseph Myers2023-01-063-3/+3
| | | | | | I've updated copyright dates in glibc for 2023. This is the patch for the changes not generated by scripts/update-copyrights and subsequent build / regeneration of generated files.
* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-0687-87/+87
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* Avoid use of atoi in mallocJoseph Myers2022-12-221-7/+12
| | | | | | | | | | | | | | | | | | | | | | This patch is analogous to commit a3708cf6b0a5a68e2ed1ce3db28a03ed21d368d2. atoi has undefined behavior on out-of-range input, which makes it problematic to use anywhere in glibc that might be processing input out-of-range for atoi but not specified to produce undefined behavior for the function calling atoi. In conjunction with the C2x strtol changes, use of atoi in libc can also result in localplt test failures because the redirection for strtol does not interact properly with the libc_hidden_proto call for __isoc23_strtol for the call in the inline atoi implementation. In malloc/arena.c, this issue shows up for atoi calls that are only compiled for --disable-tunables (thus with the x86_64-linux-gnu-minimal configuration of build-many-glibcs.py, for example). Change those atoi calls to use strtol directly, as in the previous such changes. Tested for x86_64 (--disable-tunables).
* realloc: Return unchanged if request is within usable sizeSiddhesh Poyarekar2022-12-082-0/+33
| | | | | | | | | | | | | | | | | If there is enough space in the chunk to satisfy the new size, return the old pointer as is, thus avoiding any locks or reallocations. The only real place this has a benefit is in large chunks that tend to get satisfied with mmap, since there is a large enough spare size (up to a page) for it to matter. For allocations on heap, the extra size is typically barely a few bytes (up to 15) and it's unlikely that it would make much difference in performance. Also added a smoke test to ensure that the old pointer is returned unchanged if the new size to realloc is within usable size of the old pointer. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Use uintptr_t for pointer alignmentCarlos Eduardo Seo2022-11-011-3/+3
| | | | | | Avoid integer casts that assume unsigned long can represent pointers. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Remove unused scratch_buffer_dupfreeSzabolcs Nagy2022-10-284-63/+0
| | | | | | | | | | | | Turns out scratch_buffer_dupfree internal API was unused since commit ef0700004bf0dccf493a5e8e21f71d9e7972ea9f stdlib: Simplify buffer management in canonicalize And the related test in malloc/tst-scratch_buffer had issues so it's better to remove it completely. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* malloc: Use uintptr_t in alloc_bufferSzabolcs Nagy2022-10-281-3/+3
| | | | | | | The values represnt pointers and not sizes. The members of struct alloc_buffer are already uintptr_t. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* malloc: Switch global_max_fast to uint8_tFlorian Weimer2022-10-131-1/+1
| | | | | | | | MAX_FAST_SIZE is 160 at most, so a uint8_t is sufficient. This makes it harder to use memory corruption, by overwriting global_max_fast with a large value, to fundamentally alter malloc behavior. Reviewed-by: DJ Delorie <dj@redhat.com>
* Use atomic_exchange_release/acquireWilco Dijkstra2022-09-261-1/+1
| | | | | | | Rename atomic_exchange_rel/acq to use atomic_exchange_release/acquire since these map to the standard C11 atomic builtins. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* malloc: Print error when oldsize is not equal to the current size.Qingqing Li2022-09-221-1/+2
| | | | | | | | This is used to detect errors early. The read of the oldsize is not protected by any lock, so check this value to avoid causing bigger mistakes. Reviewed-by: DJ Delorie <dj@redhat.com>
* Use C11 atomics instead of atomic_decrement(_val)Wilco Dijkstra2022-09-091-1/+1
| | | | | | | Replace atomic_decrement and atomic_decrement_val with atomic_fetch_add_relaxed. Reviewed-by: DJ Delorie <dj@redhat.com>
* Use C11 atomics instead atomic_add(_zero)Wilco Dijkstra2022-09-091-1/+1
| | | | | | Replace atomic_add and atomic_add_zero with atomic_fetch_add_relaxed. Reviewed-by: DJ Delorie <dj@redhat.com>
* malloc: Use C11 atomics rather than atomic_exchange_and_addWilco Dijkstra2022-09-061-3/+3
| | | | | | | Replace a few counters using atomic_exchange_and_add with atomic_fetch_add_relaxed. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* malloc: Do not use MAP_NORESERVE to allocate heap segmentsFlorian Weimer2022-08-152-8/+1
| | | | | | | | | | | | | | | | | | Address space for heap segments is reserved in a mmap call with MAP_ANONYMOUS | MAP_PRIVATE and protection flags PROT_NONE. This reservation does not count against the RSS limit of the process or system. Backing memory is allocated using mprotect in alloc_new_heap and grow_heap, and at this point, the allocator expects the kernel to provide memory (subject to memory overcommit). The SIGSEGV that might generate due to MAP_NORESERVE (according to the mmap manual page) does not seem to occur in practice, it's always SIGKILL from the OOM killer. Even if there is a way that SIGSEGV could be generated, it is confusing to applications that this only happens for secondary heaps, not for large mmap-based allocations, and not for the main arena. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* assert: Do not use stderr in libc-internal assertFlorian Weimer2022-08-031-16/+0
| | | | | | | | | | | | | | | | | | | | Redirect internal assertion failures to __libc_assert_fail, based on based on __libc_message, which writes directly to STDERR_FILENO and calls abort. Also disable message translation and reword the error message slightly (adjusting stdlib/tst-bz20544 accordingly). As a result of these changes, malloc no longer needs its own redefinition of __assert_fail. __libc_assert_fail needs to be stubbed out during rtld dependency analysis because the rtld rebuilds turn __libc_assert_fail into __assert_fail, which is unconditionally provided by elf/dl-minimal.c. This change is not possible for the public assert macro and its __assert_fail function because POSIX requires that the diagnostic is written to stderr. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* stdio: Clean up __libc_message after unconditional abortFlorian Weimer2022-08-031-3/+2
| | | | | | | | | | | | Since commit ec2c1fcefb200c6cb7e09553f3c6af8815013d83 ("malloc: Abort on heap corruption, without a backtrace [BZ #21754]"), __libc_message always terminates the process. Since commit a289ea09ea843ced6e5277c2f2e63c357bc7f9a3 ("Do not print backtraces on fatal glibc errors"), the backtrace facility has been removed. Therefore, remove enum __libc_message_action and the action argument of __libc_message, and mark __libc_message as _No_return. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* malloc: Use __getrandom_nocancel during tcache initiailizationFlorian Weimer2022-08-011-1/+2
| | | | | | | | | | Cancellation currently cannot happen at this point because dlopen as used by the unwind link always performs additional allocations for libgcc_s.so.1, even if it has been loaded already as a dependency of the main executable. But it seems prudent not to rely on this quirk. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Remove spurious references to _dl_open_hookFlorian Weimer2022-08-011-5/+0
| | | | | | | _dl_open_hook was removed in commit 466c1ea15f461edb8e3ffaf5d86d708 ("dlfcn: Rework static dlopen hooks"). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417)Adhemerval Zanella Netto2022-07-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The implementation is based on scalar Chacha20 with per-thread cache. It uses getrandom or /dev/urandom as fallback to get the initial entropy, and reseeds the internal state on every 16MB of consumed buffer. To improve performance and lower memory consumption the per-thread cache is allocated lazily on first arc4random functions call, and if the memory allocation fails getentropy or /dev/urandom is used as fallback. The cache is also cleared on thread exit iff it was initialized (so if arc4random is not called it is not touched). Although it is lock-free, arc4random is still not async-signal-safe (the per thread state is not updated atomically). The ChaCha20 implementation is based on RFC8439 [1], omitting the final XOR of the keystream with the plaintext because the plaintext is a stream of zeros. This strategy is similar to what OpenBSD arc4random does. The arc4random_uniform is based on previous work by Florian Weimer, where the algorithm is based on Jérémie Lumbroso paper Optimal Discrete Uniform Generation from Coin Flips, and Applications (2013) [2], who credits Donald E. Knuth and Andrew C. Yao, The complexity of nonuniform random number generation (1976), for solving the general case. The main advantage of this method is the that the unit of randomness is not the uniform random variable (uint32_t), but a random bit. It optimizes the internal buffer sampling by initially consuming a 32-bit random variable and then sampling byte per byte. Depending of the upper bound requested, it might lead to better CPU utilization. Checked on x86_64-linux-gnu, aarch64-linux, and powerpc64le-linux-gnu. Co-authored-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Yann Droneaud <ydroneaud@opteya.com> [1] https://datatracker.ietf.org/doc/html/rfc8439 [2] https://arxiv.org/pdf/1304.1916.pdf
* malloc: Simplify implementation of __malloc_assertFlorian Weimer2022-07-211-10/+5
| | | | | | | | | | It is prudent not to run too much code after detecting heap corruption, and __fxprintf is really complex. The line number and file name do not carry much information, so it is not included in the error message. (__libc_message only supports %s formatting.) The function name and assertion should provide some context. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* malloc: Simplify checked_request2size interfaceFlorian Weimer2022-07-052-15/+18
| | | | | | | In-band signaling avoids an uninitialized variable warning when building with -Og and GCC 12. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* malloc: Fix duplicate inline for do_set_mxfastAdhemerval Zanella2022-03-231-2/+1
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* malloc: Exit early on test failure in tst-reallocFlorian Weimer2022-03-101-31/+15
| | | | | | | | | | This addresses more (correct) use-after-free warnings reported by GCC 12 on some targets. Fixes commit c094c232eb3246154265bb035182f92fe1b17ab8 ("Avoid -Wuse-after-free in tests [BZ #26779]."). Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-05 05:10:55 +0000