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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>
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@ -85,6 +85,12 @@ void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
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}
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EXPORT_SYMBOL(__gcov_merge_ior);
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void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_time_profile);
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/**
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* gcov_enable_events - enable event reporting through gcov_event()
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*
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@ -18,7 +18,12 @@
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#include <linux/vmalloc.h>
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#include "gcov.h"
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#if __GNUC__ == 4 && __GNUC_MINOR__ >= 9
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#define GCOV_COUNTERS 9
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#else
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#define GCOV_COUNTERS 8
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#endif
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#define GCOV_TAG_FUNCTION_LENGTH 3
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static struct gcov_info *gcov_info_head;
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