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provide workaround for pthread_get_stacksize_np
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* MP support header */ | ||
| #include "MacportsLegacySupport.h" | ||
| #if __MP_LEGACY_SUPPORT_PTHREAD_GET_STACKSIZE_NP_FIX__ | ||
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| #include <pthread.h> | ||
| #include <sys/resource.h> | ||
| #include <dlfcn.h> | ||
| #include <stdlib.h> | ||
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| #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1090 | ||
| /* private system call available on OS X Mavericks (version 10.9) and later */ | ||
| /* see https://github.com/apple-oss-distributions/libpthread/blob/ba8e1488a0e6848b710c5daad2e226f66cfed656/private/pthread/private.h#L34 */ | ||
| pthread_t pthread_main_thread_np(void); | ||
| #endif | ||
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| #define kMaxThreadStackSize 0x40000000 /* from LLVM: 1 << 30 or 1Gb */ | ||
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| size_t pthread_get_stacksize_np(pthread_t t) { | ||
| #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1090 | ||
| int is_main_thread = pthread_equal(t, pthread_main_thread_np()); | ||
| #else | ||
| /* taken from Apple Libc */ | ||
| /* see https://github.com/apple-oss-distributions/Libc/blob/224a8105d573730ae33f474ae5b63b113123aee4/pthreads/pthread.c#L1167 */ | ||
| /* for _PTHREAD_CREATE_PARENT, see https://github.com/apple-oss-distributions/Libc/blob/224a8105d573730ae33f474ae5b63b113123aee4/pthreads/pthread_internals.h#L647C9-L647C31 */ | ||
| /* for pthread_t, see https://github.com/apple-oss-distributions/Libc/blob/224a8105d573730ae33f474ae5b63b113123aee4/pthreads/pthread_internals.h#L107 */ | ||
| /* for pthread_lock_t, see https://github.com/apple-oss-distributions/Libc/blob/224a8105d573730ae33f474ae5b63b113123aee4/pthreads/pthread_machdep.h#L214C13-L214C27 */ | ||
| struct | ||
| { | ||
| long sig; | ||
| struct __darwin_pthread_handler_rec *cleanup_stack; | ||
| int lock; | ||
| __int32_t detached:8, | ||
| inherit:8, | ||
| policy:8, | ||
| freeStackOnExit:1, | ||
| newstyle:1, | ||
| kernalloc:1, | ||
| schedset:1, | ||
| wqthread:1, | ||
| pad:3; | ||
| char opaque[__PTHREAD_SIZE__-sizeof(int)-sizeof(__int32_t)]; | ||
| } *thread = (void*) t; | ||
| int is_main_thread = ((thread->detached & 4) == 4); | ||
| #endif | ||
| if ( is_main_thread ) { | ||
| /* use LLVM workaround */ | ||
| /* see https://github.com/llvm/llvm-project/blob/617a15a9eac96088ae5e9134248d8236e34b91b1/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp#L414 */ | ||
| /* OpenJDK also has a workaround */ | ||
| /* see https://github.com/openjdk/jdk/blob/e833bfc8ac6104522d037e7eb300f5aa112688bb/src/hotspot/os_cpu/bsd_x86/os_bsd_x86.cpp#L715 */ | ||
| struct rlimit limit; | ||
| if( getrlimit(RLIMIT_STACK, &limit) ) { | ||
| exit(EXIT_FAILURE); | ||
| } | ||
| if( limit.rlim_cur < kMaxThreadStackSize ) { | ||
| return limit.rlim_cur; | ||
| } else { | ||
| return kMaxThreadStackSize; | ||
| } | ||
| } else { | ||
| /* bug only affects main thread */ | ||
| size_t (*real_pthread_get_stacksize_np)(pthread_t); | ||
| real_pthread_get_stacksize_np = dlsym(RTLD_NEXT, "pthread_get_stacksize_np"); | ||
| if (real_pthread_get_stacksize_np == NULL) { | ||
| exit(EXIT_FAILURE); | ||
| } | ||
| return real_pthread_get_stacksize_np(t); | ||
| } | ||
| } | ||
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| #endif /* __MP_LEGACY_SUPPORT_PTHREAD_GET_STACKSIZE_NP_FIX__ */ |