368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <algorithm>
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#include <cstdio>
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#include <cstdlib>
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#include <__threading_support>
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#include <unistd.h>
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#include "../src/cxa_exception.h"
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typedef __cxxabiv1::__cxa_eh_globals globals_t ;
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void *thread_code (void *parm) {
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size_t *result = (size_t *) parm;
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globals_t *glob1, *glob2;
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glob1 = __cxxabiv1::__cxa_get_globals ();
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if ( NULL == glob1 )
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std::printf("Got null result from __cxa_get_globals\n");
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glob2 = __cxxabiv1::__cxa_get_globals_fast ();
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if ( glob1 != glob2 )
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std::printf("Got different globals!\n");
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*result = (size_t) glob1;
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#ifndef _LIBCXXABI_HAS_NO_THREADS
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sleep ( 1 );
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#endif
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return parm;
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}
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#ifndef _LIBCXXABI_HAS_NO_THREADS
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#define NUMTHREADS 10
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size_t thread_globals [ NUMTHREADS ] = { 0 };
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std::__libcpp_thread_t threads [ NUMTHREADS ];
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#endif
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int main() {
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#ifndef _LIBCXXABI_HAS_NO_THREADS
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// Make the threads, let them run, and wait for them to finish
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for ( int i = 0; i < NUMTHREADS; ++i )
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std::__libcpp_thread_create ( threads + i, thread_code, (void *) (thread_globals + i));
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for ( int i = 0; i < NUMTHREADS; ++i )
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std::__libcpp_thread_join ( &threads [ i ] );
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int retVal = 0;
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for ( int i = 0; i < NUMTHREADS; ++i ) {
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if ( 0 == thread_globals [ i ] ) {
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std::printf("Thread #%d had a zero global\n", i);
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retVal = 1;
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}
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}
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std::sort ( thread_globals, thread_globals + NUMTHREADS );
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for ( int i = 1; i < NUMTHREADS; ++i ) {
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if ( thread_globals [ i - 1 ] == thread_globals [ i ] ) {
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std::printf("Duplicate thread globals (%d and %d)\n", i-1, i);
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retVal = 2;
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}
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}
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return retVal;
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#else // _LIBCXXABI_HAS_NO_THREADS
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size_t thread_globals;
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thread_code(&thread_globals);
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// Check that __cxa_get_globals() is not NULL.
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return (thread_globals == 0) ? 1 : 0;
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#endif // !_LIBCXXABI_HAS_NO_THREADS
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}
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