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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-01-14 18:30:06 -0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-01-16 10:58:47 +0100 |
commit | 9e201442de7c954f03710ac76f28c1927d07550c (patch) | |
tree | 7682ebe87ca85468e0ecd28b277013e9359605c0 /tools/perf/util/header.c | |
parent | 8d0591f6ad9edf66697ce29de176fb6f3213b9e3 (diff) | |
download | kernel_samsung_smdk4412-9e201442de7c954f03710ac76f28c1927d07550c.zip kernel_samsung_smdk4412-9e201442de7c954f03710ac76f28c1927d07550c.tar.gz kernel_samsung_smdk4412-9e201442de7c954f03710ac76f28c1927d07550c.tar.bz2 |
perf symbols: Cache /proc/kallsyms files by build-id
So that when we don't have a vmlinux handy we can store the
kallsyms for later use by 'perf report'.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1263501006-14185-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/header.c')
-rw-r--r-- | tools/perf/util/header.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index b31e0ae..1b65fed 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -237,11 +237,13 @@ static int dso__cache_build_id(struct dso *self, const char *debugdir) char *filename = malloc(size), *linkname = malloc(size), *targetname, *sbuild_id; int len, err = -1; + bool is_kallsyms = self->kernel && self->long_name[0] != '/'; if (filename == NULL || linkname == NULL) goto out_free; - len = snprintf(filename, size, "%s%s", debugdir, self->long_name); + len = snprintf(filename, size, "%s%s%s", + debugdir, is_kallsyms ? "/" : "", self->long_name); if (mkdir_p(filename, 0755)) goto out_free; @@ -249,9 +251,14 @@ static int dso__cache_build_id(struct dso *self, const char *debugdir) sbuild_id = filename + len; build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); - if (access(filename, F_OK) && link(self->long_name, filename) && - copyfile(self->long_name, filename)) - goto out_free; + if (access(filename, F_OK)) { + if (is_kallsyms) { + if (copyfile("/proc/kallsyms", filename)) + goto out_free; + } else if (link(self->long_name, filename) && + copyfile(self->long_name, filename)) + goto out_free; + } len = snprintf(linkname, size, "%s/.build-id/%.2s", debugdir, sbuild_id); |