* lib/gcc-dg.exp (${tool}_load): Handle non-existing
	set_target_env_var the same as if it is empty list.
	(dg-set-target-env-var): Fix up error message.
	(set-target-env-var): Record both preexisting env var values
	as well as info that env wasn't set.
	(restore-target-env-var): Iterate on reversed list, if second
	sublist element is 1, setenv the env var to the third sublist
	element, otherwise unsetenv it.
	(gcc-dg-runtest): Don't initialize set_target_env_var.
	(dg-test): Unset set_target_env_var if it was set.

	* g++.dg/asan/deep-tail-call-1.C: Whitespace fixes.  Don't rely
	on argc being one.
	* g++.dg/asan/interception-malloc-test-1.C: Only run on linux.
	Whitespace fixes.  Avoid unnecessary * sizeof(char).
	* g++.dg/asan/deep-thread-stack-1.C: Add -lasan -lpthread to
	dg-options.  Whitespace fixes.
	* g++.dg/asan/deep-stack-uaf-1.C: Skip for -flto.  Whitespace fixes.
	* g++.dg/asan/interception-test-1.C: Whitespace fixes.
	* g++.dg/asan/interception-failure-test-1.C: Whitespace fixes.
	Avoid unnecessary * sizeof(char).  Remove // CHECK: comment.
	* g++.dg/asan/default-options-1.C: Whitespace fixes.
	* g++.dg/asan/symbolize-callback-1.C: Whitespace fixes.  Make
	first __asan_symbolize argument unnamed.  Avoid unnecessary
	* sizeof(char).
	* g++.dg/asan/large-func-test-1.C: Whitespace fixes.  Don't rely
	on argc being one.  Allow both _Znwj and _Znwm as operator new.
	Ignore everything in the backtrace above operator new.  Fix up
	dg-output regexps.
	* c-c++-common/asan/null-deref-1.c: Add -fno-omit-frame-pointer
	and for x86 -mno-omit-leaf-frame-pointer.  Fix up dg-output regexps.
	* c-c++-common/asan/clone-test-1.c: Whitespace fixes.  Return non-zero
	on failures.  Avoid pointless PASS dg-output check. Remove bogus
	dg-shouldfail.
	* c-c++-common/asan/sanity-check-pure-c-1.c: Fix up dg-output regexps.
	Avoid unnecessary * sizeof(char).
	* c-c++-common/asan/heap-overflow-1.c: Fix up dg-output regexps.
	Don't rely on argc being one.
	* c-c++-common/asan/sleep-before-dying-1.c: Whitespace fixes.
	Avoid unnecessary * sizeof(char).
	* c-c++-common/asan/rlimit-mmap-test-1.c: Whitespace fixes.
	* c-c++-common/asan/stack-overflow-1.c: Fix up dg-output regexps.
	* c-c++-common/asan/global-overflow-1.c: Add -fno-builtin-memset.
	Fix up dg-output regexps.
	* c-c++-common/asan/strncpy-overflow-1.c: Fix up dg-output regexps.
	* c-c++-common/asan/memcmp-1.c:	Don't rely on argc being one.
	* c-c++-common/asan/use-after-free-1.c: Fix up dg-output regexps.
	* c-c++-common/asan/swapcontext-test-1.c: Don't rely on argc being
	one.
	* c-c++-common/asan/force-inline-opt0-1.c: Remove dg-skip-if.
	* c-c++-common/asan/strip-path-prefix-1.c: Whitespace fixes.
	Avoid unnecessary * sizeof(char).

2012-12-12  Wei Mi  <wmi@google.com>

	* lib/target-supports.exp (check_effective_target_dlopen,
	check_effective_target_clone, check_effective_target_setrlimit,
	check_effective_target_swapcontext): New procedures.
	* lib/gcc-dg.exp (${tool}_load): Handle dg-set-target-env-var.
	(dg-set-target-env-var, set-target-env-var,
	restore-target-env-var): New procedures.
	(gcc-dg-runtest): Set set_target_env_var.
	* g++.dg/asan/symbolize-callback-1.C: New test.
	* g++.dg/asan/shared-lib-test-1-so.cc: New file.
	* g++.dg/asan/deep-tail-call-1.C: New test.
	* g++.dg/asan/default-options-1.C: New test.
	* g++.dg/asan/interception-test-1.C: New test.
	* g++.dg/asan/dlclose-test-1-so.cc: New file.
	* g++.dg/asan/deep-thread-stack-1.C: New test.
	* g++.dg/asan/interception-malloc-test-1.C: New test.
	* g++.dg/asan/deep-stack-uaf-1.C: New test.
	* g++.dg/asan/large-func-test-1.C: New test.
	* g++.dg/asan/interception-failure-test-1.C: New test.
	* c-c++-common/asan/strip-path-prefix-1.c: New test.
	* c-c++-common/asan/force-inline-opt0-1.c: New test.
	* c-c++-common/asan/swapcontext-test-1.c: New test.
	* c-c++-common/asan/null-deref-1.c: New test.
	* c-c++-common/asan/global-overflow-1.c: New test.
	* c-c++-common/asan/strncpy-overflow-1.c: New test.
	* c-c++-common/asan/rlimit-mmap-test-1.c: New test.
	* c-c++-common/asan/stack-overflow-1.c: New test.
	* c-c++-common/asan/use-after-free-1.c: New test.
	* c-c++-common/asan/sanity-check-pure-c-1.c: New test.
	* c-c++-common/asan/clone-test-1.c: New test.
	* c-c++-common/asan/heap-overflow-1.c: New test.
	* c-c++-common/asan/sleep-before-dying-1.c: New test.

From-SVN: r194458