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From: Siddhesh Poyarekar <siddhesh@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/siddhesh/malloc-hooks] Simplify __malloc_initialized Date: Mon, 19 Jul 2021 17:48:07 +0000 (GMT) [thread overview] Message-ID: <20210719174807.22339396E071@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ee902be2c8650bf63901d65011858d0c958d7991 commit ee902be2c8650bf63901d65011858d0c958d7991 Author: Siddhesh Poyarekar <siddhesh@sourceware.org> Date: Mon Jul 5 02:18:41 2021 +0530 Simplify __malloc_initialized Now that mcheck no longer needs to check __malloc_initialized (and no other third party hook can since the symbol is not exported), make the variable boolean and static so that it is used strictly within malloc. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com> Diff: --- include/malloc.h | 6 ------ malloc/arena.c | 12 ++++++------ malloc/malloc.c | 24 ++++++++++++------------ 3 files changed, 18 insertions(+), 24 deletions(-) diff --git a/include/malloc.h b/include/malloc.h index b77761f74d..f9c9610548 100644 --- a/include/malloc.h +++ b/include/malloc.h @@ -5,12 +5,6 @@ # ifndef _ISOMAC # include <rtld-malloc.h> -/* In the GNU libc we rename the global variable - `__malloc_initialized' to `__libc_malloc_initialized'. */ -#define __malloc_initialized __libc_malloc_initialized -/* Nonzero if the malloc is already initialized. */ -extern int __malloc_initialized attribute_hidden; - struct malloc_state; typedef struct malloc_state *mstate; diff --git a/malloc/arena.c b/malloc/arena.c index 9111b49589..840426f9fb 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -97,7 +97,7 @@ static mstate free_list; __libc_lock_define_initialized (static, list_lock); /* Already initialized? */ -int __malloc_initialized = -1; +static bool __malloc_initialized = false; /**************************************************************************/ @@ -143,7 +143,7 @@ int __malloc_initialized = -1; void __malloc_fork_lock_parent (void) { - if (__malloc_initialized < 1) + if (!__malloc_initialized) return; /* We do not acquire free_list_lock here because we completely @@ -163,7 +163,7 @@ __malloc_fork_lock_parent (void) void __malloc_fork_unlock_parent (void) { - if (__malloc_initialized < 1) + if (!__malloc_initialized) return; for (mstate ar_ptr = &main_arena;; ) @@ -179,7 +179,7 @@ __malloc_fork_unlock_parent (void) void __malloc_fork_unlock_child (void) { - if (__malloc_initialized < 1) + if (!__malloc_initialized) return; /* Push all arenas to the free list, except thread_arena, which is @@ -286,10 +286,10 @@ static void tcache_key_initialize (void); static void ptmalloc_init (void) { - if (__malloc_initialized >= 0) + if (__malloc_initialized) return; - __malloc_initialized = 0; + __malloc_initialized = true; #if USE_TCACHE tcache_key_initialize (); diff --git a/malloc/malloc.c b/malloc/malloc.c index cf71314b2b..ed0316e690 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -3195,7 +3195,7 @@ __libc_malloc (size_t bytes) _Static_assert (PTRDIFF_MAX <= SIZE_MAX / 2, "PTRDIFF_MAX is not more than half of SIZE_MAX"); - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); #if USE_TCACHE /* int_free also calls request2size, be careful to not pad twice. */ @@ -3308,7 +3308,7 @@ __libc_realloc (void *oldmem, size_t bytes) void *newp; /* chunk to return */ - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); #if REALLOC_ZERO_BYTES_FREES @@ -3444,7 +3444,7 @@ libc_hidden_def (__libc_realloc) void * __libc_memalign (size_t alignment, size_t bytes) { - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); void *address = RETURN_ADDRESS (0); @@ -3515,7 +3515,7 @@ libc_hidden_def (__libc_memalign) void * __libc_valloc (size_t bytes) { - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); void *address = RETURN_ADDRESS (0); @@ -3526,7 +3526,7 @@ __libc_valloc (size_t bytes) void * __libc_pvalloc (size_t bytes) { - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); void *address = RETURN_ADDRESS (0); @@ -3565,7 +3565,7 @@ __libc_calloc (size_t n, size_t elem_size) sz = bytes; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); MAYBE_INIT_TCACHE (); @@ -5022,7 +5022,7 @@ __malloc_trim (size_t s) { int result = 0; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); mstate ar_ptr = &main_arena; @@ -5157,7 +5157,7 @@ __libc_mallinfo2 (void) struct mallinfo2 m; mstate ar_ptr; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); memset (&m, 0, sizeof (m)); @@ -5208,7 +5208,7 @@ __malloc_stats (void) mstate ar_ptr; unsigned int in_use_b = mp_.mmapped_mem, system_b = in_use_b; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); _IO_flockfile (stderr); int old_flags2 = stderr->_flags2; @@ -5377,7 +5377,7 @@ __libc_mallopt (int param_number, int value) mstate av = &main_arena; int res = 1; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); __libc_lock_lock (av->mutex); @@ -5595,7 +5595,7 @@ __posix_memalign (void **memptr, size_t alignment, size_t size) { void *mem; - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); /* Test whether the SIZE argument is valid. It must be a power of @@ -5639,7 +5639,7 @@ __malloc_info (int options, FILE *fp) - if (__malloc_initialized < 0) + if (!__malloc_initialized) ptmalloc_init (); fputs ("<malloc version=\"1\">\n", fp);
next reply other threads:[~2021-07-19 17:48 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-19 17:48 Siddhesh Poyarekar [this message] -- strict thread matches above, loose matches on Subject: below -- 2021-07-19 13:29 Siddhesh Poyarekar 2021-07-13 3:39 Siddhesh Poyarekar 2021-07-12 4:56 Siddhesh Poyarekar 2021-07-09 2:35 Siddhesh Poyarekar 2021-07-08 13:21 Siddhesh Poyarekar
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