diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/dsos.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/tools/perf/util/dsos.c b/tools/perf/util/dsos.c index 183a81d5b2f9..2bd23e4cf19e 100644 --- a/tools/perf/util/dsos.c +++ b/tools/perf/util/dsos.c @@ -2,12 +2,15 @@ #include "debug.h" #include "dsos.h" #include "dso.h" +#include "util.h" #include "vdso.h" #include "namespaces.h" +#include <errno.h> #include <libgen.h> #include <stdlib.h> #include <string.h> #include <symbol.h> // filename__read_build_id +#include <unistd.h> static int __dso_id__cmp(struct dso_id *a, struct dso_id *b) { @@ -20,8 +23,19 @@ static int __dso_id__cmp(struct dso_id *a, struct dso_id *b) if (a->ino > b->ino) return -1; if (a->ino < b->ino) return 1; - if (a->ino_generation > b->ino_generation) return -1; - if (a->ino_generation < b->ino_generation) return 1; + /* + * Synthesized MMAP events have zero ino_generation, avoid comparing + * them with MMAP events with actual ino_generation. + * + * I found it harmful because the mismatch resulted in a new + * dso that did not have a build ID whereas the original dso did have a + * build ID. The build ID was essential because the object was not found + * otherwise. - Adrian + */ + if (a->ino_generation && b->ino_generation) { + if (a->ino_generation > b->ino_generation) return -1; + if (a->ino_generation < b->ino_generation) return 1; + } return 0; } @@ -76,6 +90,16 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits) if (filename__read_build_id(pos->long_name, &pos->bid) > 0) { have_build_id = true; pos->has_build_id = true; + } else if (errno == ENOENT && pos->nsinfo) { + char *new_name = filename_with_chroot(pos->nsinfo->pid, + pos->long_name); + + if (new_name && filename__read_build_id(new_name, + &pos->bid) > 0) { + have_build_id = true; + pos->has_build_id = true; + } + free(new_name); } nsinfo__mountns_exit(&nsc); } |