perf tools: Add data_fd into dso object

Adding data_fd into dso object so we could handle caching
of opened dso file data descriptors coming int next patches.

Adding dso__data_close interface to keep the data_fd updated
when the descriptor is closed.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-4-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 1c3cdaf..5acb4b8 100644 (file)
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -159,6 +159,14 @@ static int open_dso(struct dso *dso, struct machine *machine)
        return fd;
 }
 
+void dso__data_close(struct dso *dso)
+{
+       if (dso->data.fd >= 0) {
+               close(dso->data.fd);
+               dso->data.fd = -1;
+       }
+}
+
 int dso__data_fd(struct dso *dso, struct machine *machine)
 {
        enum dso_binary_type binary_type_data[] = {
@@ -168,8 +176,13 @@ int dso__data_fd(struct dso *dso, struct machine *machine)
        };
        int i = 0;
 
-       if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND)
-               return open_dso(dso, machine);
+       if (dso->data.fd >= 0)
+               return dso->data.fd;
+
+       if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
+               dso->data.fd = open_dso(dso, machine);
+               return dso->data.fd;
+       }
 
        do {
                int fd;
@@ -178,7 +191,7 @@ int dso__data_fd(struct dso *dso, struct machine *machine)
 
                fd = open_dso(dso, machine);
                if (fd >= 0)
-                       return fd;
+                       return dso->data.fd = fd;
 
        } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
 
@@ -301,7 +314,7 @@ dso_cache__read(struct dso *dso, struct machine *machine,
        if (ret <= 0)
                free(cache);
 
-       close(fd);
+       dso__data_close(dso);
        return ret;
 }
 
@@ -474,6 +487,7 @@ struct dso *dso__new(const char *name)
                for (i = 0; i < MAP__NR_TYPES; ++i)
                        dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
                dso->data.cache = RB_ROOT;
+               dso->data.fd = -1;
                dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
                dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
                dso->loaded = 0;
@@ -506,6 +520,7 @@ void dso__delete(struct dso *dso)
                dso->long_name_allocated = false;
        }
 
+       dso__data_close(dso);
        dso_cache__free(&dso->data.cache);
        dso__free_a2l(dso);
        zfree(&dso->symsrc_filename);

diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 7637fdd..e48dcf5 100644 (file)
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -102,6 +102,7 @@ struct dso {
        /* dso data file */
        struct {
                struct rb_root   cache;
+               int              fd;
        } data;
 
        char             name[0];
@@ -147,6 +148,8 @@ int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type t
                                   char *root_dir, char *filename, size_t size);
 
 int dso__data_fd(struct dso *dso, struct machine *machine);
+void dso__data_close(struct dso *dso);
+
 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
                              u64 offset, u8 *data, ssize_t size);
 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,

diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index bd5768d..4f8dd9e 100644 (file)
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -250,7 +250,7 @@ static int read_unwind_spec_eh_frame(struct dso *dso, struct machine *machine,
 
        /* Check the .eh_frame section for unwinding info */
        offset = elf_section_offset(fd, ".eh_frame_hdr");
-       close(fd);
+       dso__data_close(dso);
 
        if (offset)
                ret = unwind_spec_ehframe(dso, machine, offset,
@@ -271,7 +271,7 @@ static int read_unwind_spec_debug_frame(struct dso *dso,
 
        /* Check the .debug_frame section for unwinding info */
        *offset = elf_section_offset(fd, ".debug_frame");
-       close(fd);
+       dso__data_close(dso);
 
        if (*offset)
                return 0;