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authorAdrian Hunter <adrian.hunter@intel.com>2014-07-22 16:17:18 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-07-23 11:22:35 -0300
commitc27697d6dee02ef2389b6701c792a075bc9873dc (patch)
treedd651ab086c5f25d5cee4a51b1b4f6928bad9645 /tools/perf/util
parent578bea40058b68f83658827c2b68a596b08419fc (diff)
downloadop-kernel-dev-c27697d6dee02ef2389b6701c792a075bc9873dc.zip
op-kernel-dev-c27697d6dee02ef2389b6701c792a075bc9873dc.tar.gz
perf tools: Record whether a dso has data
Add 'data.status' to record whether a dso has data (i.e. an object file). This is used to avoid repeatedly creating the file name and attempting to open a file that is not present. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1406035081-14301-10-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/dso.c23
-rw-r--r--tools/perf/util/dso.h7
2 files changed, 22 insertions, 8 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 28cf747..8827db3 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -331,26 +331,32 @@ int dso__data_fd(struct dso *dso, struct machine *machine)
};
int i = 0;
+ if (dso->data.status == DSO_DATA_STATUS_ERROR)
+ return -1;
+
if (dso->data.fd >= 0)
- return dso->data.fd;
+ goto out;
if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
dso->data.fd = open_dso(dso, machine);
- return dso->data.fd;
+ goto out;
}
do {
- int fd;
-
dso->binary_type = binary_type_data[i++];
- fd = open_dso(dso, machine);
- if (fd >= 0)
- return dso->data.fd = fd;
+ dso->data.fd = open_dso(dso, machine);
+ if (dso->data.fd >= 0)
+ goto out;
} while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
+out:
+ if (dso->data.fd >= 0)
+ dso->data.status = DSO_DATA_STATUS_OK;
+ else
+ dso->data.status = DSO_DATA_STATUS_ERROR;
- return -EINVAL;
+ return dso->data.fd;
}
static void
@@ -701,6 +707,7 @@ struct dso *dso__new(const char *name)
dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
dso->data.cache = RB_ROOT;
dso->data.fd = -1;
+ dso->data.status = DSO_DATA_STATUS_UNKNOWN;
dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
dso->is_64_bit = (sizeof(void *) == 8);
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index c239e86..aeb7bcb 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -40,6 +40,12 @@ enum dso_swap_type {
DSO_SWAP__YES,
};
+enum dso_data_status {
+ DSO_DATA_STATUS_ERROR = -1,
+ DSO_DATA_STATUS_UNKNOWN = 0,
+ DSO_DATA_STATUS_OK = 1,
+};
+
#define DSO__SWAP(dso, type, val) \
({ \
type ____r = val; \
@@ -104,6 +110,7 @@ struct dso {
struct {
struct rb_root cache;
int fd;
+ int status;
size_t file_size;
struct list_head open_entry;
} data;
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