glibc/malloc/Makefile, branch master

malloc: Always install mtrace (bug 31892)

2024-06-20T08:32:16Z

Generation of the Perl script does not depend on Perl, so we can always install it even if $(PERL) is not set during the build. Change the malloc/mtrace.pl text substition not to rely on $(PERL). Instead use PATH at run time to find the Perl interpreter. The Perl interpreter cannot execute directly a script that starts with “#! /bin/sh”: it always executes it with /bin/sh. There is no perl command line switch to disable this behavior. Instead, use the Perl require function to execute the script. The additional shift calls remove the “.” shell arguments. Perl interprets the “.” as a string concatenation operator, making the expression syntactically valid. Reviewed-by: Carlos O'Donell

malloc: New test to check malloc alternate path using memory obstruction

2024-06-04T16:00:29Z

The test aims to ensure that malloc uses the alternate path to allocate memory when sbrk() or brk() fails.To achieve this, the test first creates an obstruction at current program break, tests that obstruction with a failing sbrk(), then checks if malloc is still returning a valid ptr thus inferring that malloc() used mmap() instead of brk() or sbrk() to allocate the memory. Reviewed-by: Arjun Shankar Reviewed-by: Zack Weinberg

malloc: Improve aligned_alloc and calloc test coverage.

2024-05-14T14:36:50Z

Add a DSO (malloc/tst-aligned_alloc-lib.so) that can be used during testing to interpose malloc with a call that randomly uses either aligned_alloc, __libc_malloc, or __libc_calloc in the place of malloc. Use LD_PRELOAD with the DSO to mirror malloc/tst-malloc.c testing as an example in malloc/tst-malloc-random.c. Add malloc/tst-aligned-alloc-random.c as another example that does a number of malloc calls with randomly sized, but limited to 0xffff, requests. The intention is to be able to utilize existing malloc testing to ensure that similar allocation APIs are also exposed to the same rigors. Reviewed-by: DJ Delorie

malloc/Makefile: Split and sort tests

2024-05-10T12:26:48Z

Put each test on a separate line and sort tests. Signed-off-by: H.J. Lu Reviewed-by: Carlos O'Donell

Update copyright dates with scripts/update-copyrights

2024-01-01T18:53:40Z

malloc: Fix tst-tcfree3 build csky-linux-gnuabiv2 with fortify source

2023-10-23T16:34:04Z

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

malloc: Decrease resource usage for malloc tests

2023-06-12T17:45:24Z

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

aligned_alloc: conform to C17

2023-05-08T20:40:10Z

This patch adds the strict checking for power-of-two alignments in aligned_alloc(), and updates the manual accordingly. Reviewed-by: Carlos O'Donell

malloc: Really fix tst-memalign-3 link against threads

2023-05-02T19:26:30Z

All the tst malloc variants need the thread linking flags.

malloc: Fix tst-memalign-3 link against threads

2023-05-02T19:08:10Z