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44a79a6eca
Per https://cygwin.com/pipermail/cygwin-developers/2021-October/012429.html, we may encounter a crash when starting multiple threads during process startup (here: fhandler_fifo::fixup_after_{fork,exec}) which in turn allocate memory via malloc. The problem is concurrent usage of malloc before the malloc muto has been initialized. To fix this issue, convert the muto to a SRWLOCK and make sure it is statically initalized. Thus, malloc can be called as early as necessary and malloc_init is only required to check for user space provided malloc. Note that this requires to implement a __malloc_trylock macro to be called from fork. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
18 lines
455 B
C
18 lines
455 B
C
/* heap.h: Cygwin heap manager definitions.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "perprocess.h"
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/* Heap management. */
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void heap_init ();
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#define inheap(s) \
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(cygheap->user_heap.ptr && s \
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&& ((char *) (s) >= (char *) cygheap->user_heap.base) \
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&& ((char *) (s) <= (char *) cygheap->user_heap.top))
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