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[PATCH, v2, rs6000] pr65479 Add -fasynchronous-unwind-tables when the -fsanitize=address option is seen. 

All feedback from the earlier version has been taken into account now.

This patch adds the -fasynchronous-unwind-tables option to compilations when
the -fsanitize=address option is seen but not if any
-fasynchronous-unwind-tables options were already specified.
-fasynchronous-unwind-tables causes a full strack trace to be produced when
the sanitizer detects an error.  Without the full trace several of the asan
test cases fail on powerpc.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65479 for more information.

Bootstrapped and tested on powerpc64le-unknown-linux-gnu,
powerpc64be-unknown-linux-gnu, and x86_64-pc-linux-gnu with no regressions.
Is this ok for trunk?

[gcc]

2016-12-21  Bill Seurer  <seurer@linux.vnet.ibm.com>

	PR sanitizer/65479
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
	-fasynchronous-unwind-tables option when -fsanitize=address is
	specified.

From-SVN: r243863
This commit is contained in:
Bill Seurer 2016-12-21 19:09:10 +00:00 committed by Bill Seurer
parent 8f0db5664a
commit 3a8f9451d9
2 changed files with 14 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-12-21 Bill Seurer <seurer@linux.vnet.ibm.com>
PR sanitizer/65479
* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
-fasynchronous-unwind-tables option when -fsanitize=address is
specified.
2016-12-21 Bernd Schmidt <bschmidt@redhat.com>
PR target/71321

7
gcc/config/rs6000/rs6000.c
View File

@ -3858,6 +3858,13 @@ rs6000_option_override_internal (bool global_init_p)
&& !global_options_set.x_flag_ira_loop_pressure)
flag_ira_loop_pressure = 1;
/* -fsanitize=address needs to turn on -fasynchronous-unwind-tables in order
for tracebacks to be complete but not if any -fasynchronous-unwind-tables
options were already specified. */
if (flag_sanitize & SANITIZE_USER_ADDRESS
&& !global_options_set.x_flag_asynchronous_unwind_tables)
flag_asynchronous_unwind_tables = 1;
/* Set the pointer size. */
if (TARGET_64BIT)
{