Date: Sat, 17 Jan 2004 09:25:59 +0800 From: David Xu <davidxu@freebsd.org> To: freebsd-threads@freebsd.org Subject: MINSIGSTKSZ and PTHREAD_STACK_MIN Message-ID: <40088F27.90609@freebsd.org>
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There is a conflict between MINSIGSTKSZ and PTHREAD_STACK_MIN, PTHREAD_STACK_MIN defined in pthread.h has a fixed value 1024, MINSIGSTKSZ is variable on per-architecture, on i386, it is defined in sys/i386/include/signal.h: #define MINSIGSTKSZ (512 * 4) so on i386, makecontext is failed when user specifies PTHREAD_STACK_MIN for new thread, result is we get following message in libkse: Fatal error 'Thread has returned from _thread_switch' at line 1099 in file /usr/home/davidxu/src/lib/libpthread/thread/thr_kern.c (errno = 0) This becauses context is not fully initialized in pthread_create. Either makecontext shouldn't check stacksize or we should synchoronize MINSIGSTKSZ and PTHREAD_STACK_MIN. David Xu
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