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Enhance documentation of asan-use-after-return param. 

* doc/invoke.texi: Document asan-use-after-return that
	it's disabled by default in runtime.

From-SVN: r240648
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Martin Liska 2016-09-30 10:24:47 +02:00 committed by Martin Liska
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@ -1,3 +1,8 @@
2016-09-30 Martin Liska <mliska@suse.cz>
* doc/invoke.texi: Document asan-use-after-return that
it's disabled by default in runtime.
2016-09-30 Richard Biener <rguenther@suse.de>
* tree-vrp.c (intersect_ranges): If we failed to handle

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gcc/doc/invoke.texi
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@ -10034,6 +10034,10 @@ is enabled by default when using @option{-fsanitize=address} option.
To disable use-after-return detection use
@option{--param asan-use-after-return=0}.
Note: The check is disabled by default at runtime. To enable the check,
you should set environment variable @env{ASAN_OPTIONS} to
@code{detect_stack_use_after_return=1}.
@item asan-instrumentation-with-call-threshold
If number of memory accesses in function being instrumented
is greater or equal to this number, use callbacks instead of inline checks.