5419b94747
I gave up trying to use the usual thread-local buffer idiom; calls to calloc(3) and free(3) from any of the "dl" functions -- which live in the dynamic linker -- end up resolving to the dynamic linker's stubs. I tried to work around that, but was just making things more complicated. This alternative costs us a well-known TLS slot (instead of the dynamically-allocated TLS slot we'd have used otherwise, so no difference there), plus an extra buffer inside every pthread_internal_t. Bug: 5404023 Change-Id: Ie9614edd05b6d1eeaf7bf9172792d616c6361767
46 lines
1.9 KiB
C++
46 lines
1.9 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <string.h>
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#include "ThreadLocalBuffer.h"
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extern "C" const char* __strsignal_lookup(int);
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extern "C" const char* __strsignal(int, char*, size_t);
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GLOBAL_INIT_THREAD_LOCAL_BUFFER(strsignal);
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char* strsignal(int signal_number) {
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// Just return the original constant in the easy cases.
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char* result = const_cast<char*>(__strsignal_lookup(signal_number));
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if (result != NULL) {
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return result;
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}
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LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, strsignal, NL_TEXTMAX);
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return const_cast<char*>(__strsignal(signal_number, strsignal_tls_buffer, strsignal_tls_buffer_size));
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}
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