From 9e201442de7c954f03710ac76f28c1927d07550c Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 14 Jan 2010 18:30:06 -0200 Subject: perf symbols: Cache /proc/kallsyms files by build-id MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1263501006-14185-3-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/util/header.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) (limited to 'tools/perf/util/header.c') diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index b31e0ae4b8d..1b65fed0dd2 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); -- cgit v1.2.3-18-g5258