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| author | Yuan Pengfei <coolypf@qq.com> | 2014-06-10 15:18:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-10 15:34:46 -0700 |
| commit | a992bf836f9c3039a16f4bd068d161c86c6c3e2c (patch) | |
| tree | ebe4e7b553b45191df5b9fe25a446390a5a8376c /kernel/gcov | |
| parent | 79deb3c148e0ed0ac3dab9e953777b096d58b443 (diff) | |
| download | lwn-a992bf836f9c3039a16f4bd068d161c86c6c3e2c.tar.gz lwn-a992bf836f9c3039a16f4bd068d161c86c6c3e2c.zip | |
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>
Diffstat (limited to 'kernel/gcov')
| -rw-r--r-- | kernel/gcov/base.c | 6 | ||||
| -rw-r--r-- | kernel/gcov/gcc_4_7.c | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/kernel/gcov/base.c b/kernel/gcov/base.c index f45b75b713c0..b358a802fd18 100644 --- a/kernel/gcov/base.c +++ b/kernel/gcov/base.c @@ -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() * diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c index 2c6e4631c814..826ba9fb5e32 100644 --- a/kernel/gcov/gcc_4_7.c +++ b/kernel/gcov/gcc_4_7.c @@ -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; |