Commit 7ee235ef authored Mar 03, 2011 by Lin Ming Committed by Arnaldo Carvalho de Melo Mar 09, 2011

perf symbols: Avoid resolving [kernel.kallsyms] to real path for buildid cache

kallsyms has a virtual file name [kernel.kallsyms].  Currently, it can't
be added to buildid cache successfully because the code
(build_id_cache__add_s) tries to resolve [kernel.kallsyms] to a real
absolute pathname and that fails.

Fixes it by not resolving it and just use the name [kernel.kallsyms].
So dir ~/.debug/[kernel.kallsyms] is created.

Original bug report at:
https://lkml.org/lkml/2011/3/1/524



Tested-by: Han Pingtian <phan@redhat.com>
Cc: Han Pingtian <phan@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1299165837-27817-1-git-send-email-ming.m.lin@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent a639dc64

tools/perf/util/header.c

+8 −3

Original line number	Diff line number	Diff line
		@@ -270,11 +270,15 @@ int build_id_cache__add_s(const char sbuild_id, const char debugdir,
		const char *name, bool is_kallsyms)
		{
		const size_t size = PATH_MAX;
		char *realname = realpath(name, NULL),
		*filename = malloc(size),
		char realname, filename = malloc(size),
		linkname = malloc(size), targetname;
		int len, err = -1;

		if (is_kallsyms)
		realname = (char *)name;
		else
		realname = realpath(name, NULL);

		if (realname == NULL \|\| filename == NULL \|\| linkname == NULL)
		goto out_free;

		@@ -306,6 +310,7 @@ int build_id_cache__add_s(const char sbuild_id, const char debugdir,
		if (symlink(targetname, linkname) == 0)
		err = 0;
		out_free:
		if (!is_kallsyms)
		free(realname);
		free(filename);
		free(linkname);