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 <[email protected]> Signed-off-by: Lin Ming <[email protected]> --- tools/perf/util/header.c | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 72c124d..1f8883b 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -271,11 +271,15 @@ 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; @@ -307,7 +311,8 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, if (symlink(targetname, linkname) == 0) err = 0; out_free: - free(realname); + if (!is_kallsyms) + free(realname); free(filename); free(linkname); return err; -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
