Valgrind给了我疯狂的高数字，用于释放，分配和分配的字节数，以及没有意识到我已经在堆中释放了内存。
#include <stdio.h>
#include <stdlib.h>
int main(){
return 0;
}
gcc -std=c99 -g -Werror -Wextra -pedantic valgrind.c
valgrind --leak-check=full ./a.out
==44611== Memcheck, a memory error detector
==44611== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==44611== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==44611== Command: ./a.out
==44611==
==44611==
==44611== HEAP SUMMARY:
==44611== in use at exit: 22,223 bytes in 183 blocks
==44611== total heap usage: 259 allocs, 76 frees, 28,335 bytes allocated
==44611==
==44611== LEAK SUMMARY:
==44611== definitely lost: 0 bytes in 0 blocks
==44611== indirectly lost: 0 bytes in 0 blocks
==44611== possibly lost: 0 bytes in 0 blocks
==44611== still reachable: 0 bytes in 0 blocks
==44611== suppressed: 22,223 bytes in 183 blocks
==44611==
==44611== For counts of detected and suppressed errors, rerun with: -v
==44611== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 16)
它告诉我，当我的程序中没有任何内容时，我259 allocs, 76 frees, 28,335 bytes allocated是疯狂的。我害怕前几天永远不会释放malloced空间造成内存泄漏。如果是这样，任何想法如何我可以回收我Mac上以前的malloced内存？我正在使用El Capitan。
答案 0 :(得分：3)
正如我在评论中指出的那样，对于Mac OS X来说这是半正常的，至少在您调整系统之前是这样。我不得不为El Capitan添加相当多的压制（由Valgrind生成）。
首先要注意的是，您的代码不分配内存，因此您的代码无法泄漏任何内存。任何泄漏或可能泄露的东西都是在程序启动之前由操作系统完成的。
接下来需要注意的是，即使您决定担心它，也不用担心或者您可以做些什么。到目前为止，你最好的选择是让Valgrind知道你对此有所了解并继续生活。
那么，你怎么告诉Valgrind？
第1阶段正在使用--leak-check=full和--num-callers=100运行Valgrind。例如，使用您的程序leaks.c在我的El Capitan上运行，我得到了：
==43058== Memcheck, a memory error detector
==43058== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==43058== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==43058== Command: leaks
==43058==
--43058-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option
--43058-- UNKNOWN fcntl 97!
--43058-- UNKNOWN fcntl 97! (repeated 2 times)
--43058-- UNKNOWN fcntl 97! (repeated 4 times)
--43058-- UNKNOWN fcntl 97! (repeated 8 times)
--43058-- UNKNOWN fcntl 97! (repeated 16 times)
--43058-- UNKNOWN fcntl 97! (repeated 32 times)
--43058-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 2 times)
--43058-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 4 times)
--43058-- UNKNOWN task message [id 3406, to mach_task_self(), reply 0x60f]
--43058-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 8 times)
--43058-- UNKNOWN host message [id 412, to mach_host_self(), reply 0x60f]
--43058-- UNKNOWN host message [id 222, to mach_host_self(), reply 0x60f]
--43058-- UNKNOWN task message [id 3410, to mach_task_self(), reply 0x60f]
==43058==
==43058== HEAP SUMMARY:
==43058== in use at exit: 22,245 bytes in 187 blocks
==43058== total heap usage: 263 allocs, 76 frees, 28,341 bytes allocated
==43058==
==43058== LEAK SUMMARY:
==43058== definitely lost: 4,416 bytes in 4 blocks
==43058== indirectly lost: 2,288 bytes in 6 blocks
==43058== possibly lost: 7,096 bytes in 68 blocks
==43058== still reachable: 8,445 bytes in 109 blocks
==43058== suppressed: 0 bytes in 0 blocks
==43058== Rerun with --leak-check=full to see details of leaked memory
==43058==
==43058== For counts of detected and suppressed errors, rerun with: -v
==43058== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
我不喜欢那些UNKNOWN消息，但这可能意味着我需要重建。请注意，我从SVN获得了代码 - 请参阅版本号。
现在，再次运行：
$ valgrind --num-callers=100 --leak-check=full ./leaks
==43059== Memcheck, a memory error detector
==43059== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==43059== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==43059== Command: ./leaks
==43059==
--43059-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option
--43059-- UNKNOWN fcntl 97!
--43059-- UNKNOWN fcntl 97! (repeated 2 times)
--43059-- UNKNOWN fcntl 97! (repeated 4 times)
--43059-- UNKNOWN fcntl 97! (repeated 8 times)
--43059-- UNKNOWN fcntl 97! (repeated 16 times)
--43059-- UNKNOWN fcntl 97! (repeated 32 times)
--43059-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 2 times)
--43059-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 4 times)
--43059-- UNKNOWN task message [id 3406, to mach_task_self(), reply 0x60f]
--43059-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 8 times)
--43059-- UNKNOWN host message [id 412, to mach_host_self(), reply 0x60f]
--43059-- UNKNOWN host message [id 222, to mach_host_self(), reply 0x60f]
--43059-- UNKNOWN task message [id 3410, to mach_task_self(), reply 0x60f]
==43059==
==43059== HEAP SUMMARY:
==43059== in use at exit: 22,245 bytes in 187 blocks
==43059== total heap usage: 263 allocs, 76 frees, 28,341 bytes allocated
==43059==
==43059== 24 bytes in 1 blocks are possibly lost in loss record 9 of 62
==43059== at 0x100006355: malloc_zone_calloc (vg_replace_malloc.c:632)
==43059== by 0x1004FE4B1: NXHashInsert (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FE1BE: NXCreateHashTableFromZone (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FE053: NXCreateHashTable (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FD037: _read_images (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FBB4D: map_images_nolock (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FB538: map_2_images (in /usr/lib/libobjc.A.dylib)
==43059== by 0x7FFF5FC047CF: dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC04516: dyld::registerImageStateBatchChangeHandler(dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43059== by 0x10016689D: dyld_register_image_state_change_handler (in /usr/lib/system/libdyld.dylib)
==43059== by 0x1004FB07A: _objc_init (in /usr/lib/libobjc.A.dylib)
==43059== by 0x10010EC4B: _os_object_init (in /usr/lib/system/libdispatch.dylib)
==43059== by 0x10010EC37: libdispatch_init (in /usr/lib/system/libdispatch.dylib)
==43059== by 0x100010A01: libSystem_initializer (in /usr/lib/libSystem.B.dylib)
==43059== by 0x7FFF5FC12F1A: ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC13093: ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F6CC: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F661: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43059== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43059==
==43059== 24 bytes in 1 blocks are possibly lost in loss record 10 of 62
==43059== at 0x100006355: malloc_zone_calloc (vg_replace_malloc.c:632)
==43059== by 0x1004FE4B1: NXHashInsert (in /usr/lib/libobjc.A.dylib)
==43059== by 0x100500223: realizeClass(objc_class*) (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FD90C: _read_images (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FBB4D: map_images_nolock (in /usr/lib/libobjc.A.dylib)
==43059== by 0x1004FB538: map_2_images (in /usr/lib/libobjc.A.dylib)
==43059== by 0x7FFF5FC047CF: dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC04516: dyld::registerImageStateBatchChangeHandler(dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43059== by 0x10016689D: dyld_register_image_state_change_handler (in /usr/lib/system/libdyld.dylib)
==43059== by 0x1004FB07A: _objc_init (in /usr/lib/libobjc.A.dylib)
==43059== by 0x10010EC4B: _os_object_init (in /usr/lib/system/libdispatch.dylib)
==43059== by 0x10010EC37: libdispatch_init (in /usr/lib/system/libdispatch.dylib)
==43059== by 0x100010A01: libSystem_initializer (in /usr/lib/libSystem.B.dylib)
==43059== by 0x7FFF5FC12F1A: ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC13093: ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F6CC: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F661: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43059== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43059==
…lots of text missing…
==43059==
==43059== 4,096 bytes in 1 blocks are definitely lost in loss record 62 of 62
==43059== at 0x100007110: malloc_zone_memalign (vg_replace_malloc.c:769)
==43059== by 0x100504D71: (anonymous namespace)::AutoreleasePoolPage::autoreleaseNoPage(objc_object*) (in /usr/lib/libobjc.A.dylib)
==43059== by 0x100504CF5: objc_autoreleasePoolPush (in /usr/lib/libobjc.A.dylib)
==43059== by 0x100504998: call_load_methods (in /usr/lib/libobjc.A.dylib)
==43059== by 0x100501B9D: load_images (in /usr/lib/libobjc.A.dylib)
==43059== by 0x7FFF5FC01DE0: dyld::notifySingle(dyld_image_states, ImageLoader const*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F6B9: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F580: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43059== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43059== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43059==
==43059== LEAK SUMMARY:
==43059== definitely lost: 4,416 bytes in 4 blocks
==43059== indirectly lost: 2,288 bytes in 6 blocks
==43059== possibly lost: 7,096 bytes in 68 blocks
==43059== still reachable: 8,445 bytes in 109 blocks
==43059== suppressed: 0 bytes in 0 blocks
==43059== Reachable blocks (those to which a pointer was found) are not shown.
==43059== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==43059==
==43059== For counts of detected and suppressed errors, rerun with: -v
==43059== ERROR SUMMARY: 17 errors from 17 contexts (suppressed: 0 from 0)
当您查看这些堆栈跟踪时，您可以看到其中没有main条目。这表明问题不在您的代码中;它在系统代码中。因此，您再次使用--gen-suppressions=all重新运行Valgrind，并获得如下输出：
$ valgrind --gen-suppressions=all --num-callers=100 --leak-check=full ./leaks
==43060== Memcheck, a memory error detector
==43060== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==43060== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==43060== Command: ./leaks
==43060==
--43060-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option
--43060-- UNKNOWN fcntl 97!
--43060-- UNKNOWN fcntl 97! (repeated 2 times)
--43060-- UNKNOWN fcntl 97! (repeated 4 times)
--43060-- UNKNOWN fcntl 97! (repeated 8 times)
--43060-- UNKNOWN fcntl 97! (repeated 16 times)
--43060-- UNKNOWN fcntl 97! (repeated 32 times)
--43060-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 2 times)
--43060-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 4 times)
--43060-- UNKNOWN task message [id 3406, to mach_task_self(), reply 0x60f]
--43060-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 8 times)
--43060-- UNKNOWN host message [id 412, to mach_host_self(), reply 0x60f]
--43060-- UNKNOWN host message [id 222, to mach_host_self(), reply 0x60f]
--43060-- UNKNOWN task message [id 3410, to mach_task_self(), reply 0x60f]
==43060==
==43060== HEAP SUMMARY:
==43060== in use at exit: 22,245 bytes in 187 blocks
==43060== total heap usage: 263 allocs, 76 frees, 28,341 bytes allocated
==43060==
==43060== 24 bytes in 1 blocks are possibly lost in loss record 9 of 62
==43060== at 0x100006355: malloc_zone_calloc (vg_replace_malloc.c:632)
==43060== by 0x1004FE4B1: NXHashInsert (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FE1BE: NXCreateHashTableFromZone (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FE053: NXCreateHashTable (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FD037: _read_images (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FBB4D: map_images_nolock (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FB538: map_2_images (in /usr/lib/libobjc.A.dylib)
==43060== by 0x7FFF5FC047CF: dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC04516: dyld::registerImageStateBatchChangeHandler(dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43060== by 0x10016689D: dyld_register_image_state_change_handler (in /usr/lib/system/libdyld.dylib)
==43060== by 0x1004FB07A: _objc_init (in /usr/lib/libobjc.A.dylib)
==43060== by 0x10010EC4B: _os_object_init (in /usr/lib/system/libdispatch.dylib)
==43060== by 0x10010EC37: libdispatch_init (in /usr/lib/system/libdispatch.dylib)
==43060== by 0x100010A01: libSystem_initializer (in /usr/lib/libSystem.B.dylib)
==43060== by 0x7FFF5FC12F1A: ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC13093: ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F6CC: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F661: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43060== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43060==
{
<insert_a_suppression_name_here>
Memcheck:Leak
match-leak-kinds: possible
fun:malloc_zone_calloc
fun:NXHashInsert
fun:NXCreateHashTableFromZone
fun:NXCreateHashTable
fun:_read_images
fun:map_images_nolock
fun:map_2_images
fun:_ZN4dyldL18notifyBatchPartialE17dyld_image_statesbPFPKcS0_jPK15dyld_image_infoE
fun:_ZN4dyld36registerImageStateBatchChangeHandlerE17dyld_image_statesPFPKcS0_jPK15dyld_image_infoE
fun:dyld_register_image_state_change_handler
fun:_objc_init
fun:_os_object_init
fun:libdispatch_init
fun:libSystem_initializer
fun:_ZN16ImageLoaderMachO18doModInitFunctionsERKN11ImageLoader11LinkContextE
fun:_ZN16ImageLoaderMachO16doInitializationERKN11ImageLoader11LinkContextE
fun:_ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader19processInitializersERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader15runInitializersERKNS_11LinkContextERNS_21InitializerTimingListE
fun:_ZN4dyld24initializeMainExecutableEv
fun:_ZN4dyld5_mainEPK12macho_headermiPPKcS5_S5_Pm
fun:_ZN13dyldbootstrap5startEPK12macho_headeriPPKclS2_Pm
fun:_dyld_start
}
==43060== 24 bytes in 1 blocks are possibly lost in loss record 10 of 62
==43060== at 0x100006355: malloc_zone_calloc (vg_replace_malloc.c:632)
==43060== by 0x1004FE4B1: NXHashInsert (in /usr/lib/libobjc.A.dylib)
==43060== by 0x100500223: realizeClass(objc_class*) (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FD90C: _read_images (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FBB4D: map_images_nolock (in /usr/lib/libobjc.A.dylib)
==43060== by 0x1004FB538: map_2_images (in /usr/lib/libobjc.A.dylib)
==43060== by 0x7FFF5FC047CF: dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC04516: dyld::registerImageStateBatchChangeHandler(dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) (in /usr/lib/dyld)
==43060== by 0x10016689D: dyld_register_image_state_change_handler (in /usr/lib/system/libdyld.dylib)
==43060== by 0x1004FB07A: _objc_init (in /usr/lib/libobjc.A.dylib)
==43060== by 0x10010EC4B: _os_object_init (in /usr/lib/system/libdispatch.dylib)
==43060== by 0x10010EC37: libdispatch_init (in /usr/lib/system/libdispatch.dylib)
==43060== by 0x100010A01: libSystem_initializer (in /usr/lib/libSystem.B.dylib)
==43060== by 0x7FFF5FC12F1A: ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC13093: ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F6CC: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F661: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43060== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43060==
…lots of material omitted again…
==43060== 4,096 bytes in 1 blocks are definitely lost in loss record 62 of 62
==43060== at 0x100007110: malloc_zone_memalign (vg_replace_malloc.c:769)
==43060== by 0x100504D71: (anonymous namespace)::AutoreleasePoolPage::autoreleaseNoPage(objc_object*) (in /usr/lib/libobjc.A.dylib)
==43060== by 0x100504CF5: objc_autoreleasePoolPush (in /usr/lib/libobjc.A.dylib)
==43060== by 0x100504998: call_load_methods (in /usr/lib/libobjc.A.dylib)
==43060== by 0x100501B9D: load_images (in /usr/lib/libobjc.A.dylib)
==43060== by 0x7FFF5FC01DE0: dyld::notifySingle(dyld_image_states, ImageLoader const*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F6B9: ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F552: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F580: ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC0F7C2: ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC020AA: dyld::initializeMainExecutable() (in /usr/lib/dyld)
==43060== by 0x7FFF5FC05D46: dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01275: dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*, unsigned long*) (in /usr/lib/dyld)
==43060== by 0x7FFF5FC01035: _dyld_start (in /usr/lib/dyld)
==43060==
{
<insert_a_suppression_name_here>
Memcheck:Leak
match-leak-kinds: definite
fun:malloc_zone_memalign
fun:_ZN12_GLOBAL__N_119AutoreleasePoolPage17autoreleaseNoPageEP11objc_object
fun:objc_autoreleasePoolPush
fun:call_load_methods
fun:load_images
fun:_ZN4dyldL12notifySingleE17dyld_image_statesPK11ImageLoader
fun:_ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader19processInitializersERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader19processInitializersERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader15runInitializersERKNS_11LinkContextERNS_21InitializerTimingListE
fun:_ZN4dyld24initializeMainExecutableEv
fun:_ZN4dyld5_mainEPK12macho_headermiPPKcS5_S5_Pm
fun:_ZN13dyldbootstrap5startEPK12macho_headeriPPKclS2_Pm
fun:_dyld_start
}
==43060== LEAK SUMMARY:
==43060== definitely lost: 4,416 bytes in 4 blocks
==43060== indirectly lost: 2,288 bytes in 6 blocks
==43060== possibly lost: 7,096 bytes in 68 blocks
==43060== still reachable: 8,445 bytes in 109 blocks
==43060== suppressed: 0 bytes in 0 blocks
==43060== Reachable blocks (those to which a pointer was found) are not shown.
==43060== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==43060==
==43060== For counts of detected and suppressed errors, rerun with: -v
==43060== ERROR SUMMARY: 17 errors from 17 contexts (suppressed: 0 from 0)
$
然后将压缩收集到文件中，用更有用的东西替换<insert_a_suppression_name_here>。例如，我之前创建了一个条目：
{
Mac-OS-X-El-Capitan-System-Leak.019
Memcheck:Leak
match-leak-kinds: definite
fun:malloc_zone_memalign
fun:_ZN12_GLOBAL__N_119AutoreleasePoolPage17autoreleaseNoPageEP11objc_object
fun:objc_autoreleasePoolPush
fun:call_load_methods
fun:load_images
fun:_ZN4dyldL12notifySingleE17dyld_image_statesPK11ImageLoader
fun:_ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader19processInitializersERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader19processInitializersERKNS_11LinkContextEjRNS_21InitializerTimingListERNS_15UninitedUpwardsE
fun:_ZN11ImageLoader15runInitializersERKNS_11LinkContextERNS_21InitializerTimingListE
fun:_ZN4dyld24initializeMainExecutableEv
fun:_ZN4dyld5_mainEPK12macho_headermiPPKcS5_S5_Pm
}
它保存在文件suppressions中。如果我使用我之前的抑制文件运行代码（我碰巧与leaks代码位于同一目录中），我得到：
$ valgrind --suppressions=suppressions --leak-check=full --num-callers=100 ./leaks
==43063== Memcheck, a memory error detector
==43063== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==43063== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==43063== Command: ./leaks
==43063==
--43063-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option
--43063-- UNKNOWN fcntl 97!
--43063-- UNKNOWN fcntl 97! (repeated 2 times)
--43063-- UNKNOWN fcntl 97! (repeated 4 times)
--43063-- UNKNOWN fcntl 97! (repeated 8 times)
--43063-- UNKNOWN fcntl 97! (repeated 16 times)
--43063-- UNKNOWN fcntl 97! (repeated 32 times)
--43063-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 2 times)
--43063-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 4 times)
--43063-- UNKNOWN task message [id 3406, to mach_task_self(), reply 0x60f]
--43063-- UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option (repeated 8 times)
--43063-- UNKNOWN host message [id 412, to mach_host_self(), reply 0x60f]
--43063-- UNKNOWN host message [id 222, to mach_host_self(), reply 0x60f]
--43063-- UNKNOWN task message [id 3410, to mach_task_self(), reply 0x60f]
==43063==
==43063== HEAP SUMMARY:
==43063== in use at exit: 22,245 bytes in 187 blocks
==43063== total heap usage: 263 allocs, 76 frees, 28,341 bytes allocated
==43063==
==43063== LEAK SUMMARY:
==43063== definitely lost: 0 bytes in 0 blocks
==43063== indirectly lost: 2,288 bytes in 6 blocks
==43063== possibly lost: 0 bytes in 0 blocks
==43063== still reachable: 8,445 bytes in 109 blocks
==43063== suppressed: 11,512 bytes in 72 blocks
==43063== Reachable blocks (those to which a pointer was found) are not shown.
==43063== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==43063==
==43063== For counts of detected and suppressed errors, rerun with: -v
==43063== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 17 from 17)
$
你可以看到我需要做一些工作来抑制一些分配，但是没有泄漏声称。
这大致也是你需要做的事情。您应该能够与Valgrind一起安装抑制，这样您就不必每次都指定--suppressions=suppressions。
（我必须修剪输出以适应SO的30,000个字符限制。）