view modules/argz @ 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 be92ce7ad147
children
line wrap: on
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Description:
Argv style string arrays in a single null delimited char*.

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

Depends-on:
memmove         [test -n "$ARGZ_H"]
mempcpy         [test -n "$ARGZ_H"]
stpcpy          [test -n "$ARGZ_H"]
strndup         [test -n "$ARGZ_H"]
strnlen         [test -n "$ARGZ_H"]
strstr          [test -n "$ARGZ_H"]

configure.ac:
gl_FUNC_ARGZ
if test -n "$ARGZ_H"; then
  AC_LIBOBJ([argz])
fi

Makefile.am:
BUILT_SOURCES += $(ARGZ_H)

# We need the following in order to create <argz.h> when the system
# doesn't have one that works with the given compiler.
if GL_GENERATE_ARGZ_H
argz.h: argz.in.h $(top_builddir)/config.status
	$(AM_V_GEN)rm -f $@-t $@ && \
	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
	  cat $(srcdir)/argz.in.h; \
	} > $@-t && \
	mv -f $@-t $@
else
argz.h: $(top_builddir)/config.status
	rm -f $@
endif
MOSTLYCLEANFILES += argz.h argz.h-t

Include:
<argz.h>

License:
LGPLv2+

Maintainer:
all