view modules/pthread @ 37246:5cfb3a67238d

regex: avoid glibc deadlock during configure glibc has a known bug where certain corruptions of the heap can cause malloc to default to printing a debug message that includes a backtrace, but the act of getting the backtrace uses dlopen which in turn calls into malloc, causing a recursive lock ending in deadlock. Thus, when configure is probing for a known glibc heap corruption bug, the overall configure would hang. The solution suggested by glibc developers is to force malloc to quit printing debug messages, which avoids recursive malloc. * m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when glibc bug 15078 in turn triggers bug 16159. Reported by Michal Privoznik. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Tue, 03 Dec 2013 10:34:13 -0700
parents 2c5155680da7
children c4d4dc68512b
line wrap: on
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Description:
Implement a trivial subset of the pthreads library.

Files:
lib/pthread.c
lib/pthread.in.h
m4/pthread.m4

Depends-on:
extern-inline
sched
time

configure.ac:
gl_PTHREAD_CHECK
gl_MODULE_INDICATOR([pthread])

Makefile.am:
BUILT_SOURCES += $(PTHREAD_H)

# We need the following in order to create <pthread.h> when the system
# doesn't have one that works with the given compiler.
if GL_GENERATE_PTHREAD_H
pthread.h: pthread.in.h $(top_builddir)/config.status
	$(AM_V_GEN)rm -f $@-t $@ && \
	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
	  sed -e 's|@''GUARD_PREFIX''@|${gl_include_guard_prefix}|g' \
	      -e 's|@''HAVE_PTHREAD_H''@|$(HAVE_PTHREAD_H)|g' \
	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
	      -e 's|@''NEXT_PTHREAD_H''@|$(NEXT_PTHREAD_H)|g' \
	      -e 's|@''HAVE_PTHREAD_T''@|$(HAVE_PTHREAD_T)|g' \
	      -e 's|@''HAVE_PTHREAD_SPINLOCK_T''@|$(HAVE_PTHREAD_SPINLOCK_T)|g' \
	      < $(srcdir)/pthread.in.h; \
	} > $@-t && \
	mv $@-t $@
else
pthread.h: $(top_builddir)/config.status
	rm -f $@
endif
MOSTLYCLEANFILES += pthread.h pthread.h-t

Include:
<pthread.h>

Link:
$(LIB_PTHREAD)

License:
LGPLv2+

Maintainer:
Glen Lenker and Paul Eggert