Commit a992bf83 authored Jun 10, 2014 by Yuan Pengfei Committed by Linus Torvalds Jun 10, 2014

gcov: add support for GCC 4.9



This patch handles the gcov-related changes in GCC 4.9:

  A new counter (time profile) is added. The total number is 9 now.

  A new profile merge function __gcov_merge_time_profile is added.

See gcc/gcov-io.h and libgcc/libgcov-merge.c

For the first change, the layout of struct gcov_info is affected.

For the second one, a dummy function is added to kernel/gcov/base.c
similarly.

Signed-off-by: Yuan Pengfei <coolypf@qq.com>
Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 79deb3c1

kernel/gcov/base.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -85,6 +85,12 @@ void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
		}
		EXPORT_SYMBOL(__gcov_merge_ior);

		void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
		{
		/* Unused. */
		}
		EXPORT_SYMBOL(__gcov_merge_time_profile);

		/**
		* gcov_enable_events - enable event reporting through gcov_event()
		*

kernel/gcov/gcc_4_7.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -18,7 +18,12 @@
		#include <linux/vmalloc.h>
		#include "gcov.h"

		#if __GNUC__ == 4 && __GNUC_MINOR__ >= 9
		#define GCOV_COUNTERS 9
		#else
		#define GCOV_COUNTERS 8
		#endif

		#define GCOV_TAG_FUNCTION_LENGTH 3

		static struct gcov_info *gcov_info_head;

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