perf_counter tools: Enable kernel module symbol loading in tools

Add the -m/--modules option to perf report and perf annotate,
which enables live module symbol/image loading. To be used
with -k/--vmlinux.

(Also give perf annotate a -P/--full-paths option.)

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1246514986.13293.48.camel@marge.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 20 insertions, 5 deletions

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 88205686eb6e..08ea6c5329d9 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -43,6 +43,10 @@ static int		dump_trace = 0;
 
 static int              verbose;
 
+static int              modules;
+
+static int              full_paths;
+
 static int              print_line;
 
 static unsigned long    page_size;
@@ -171,7 +175,7 @@ static int load_kernel(void)
         if (!kernel_dso)
                 return -1;
 
-        err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, 0);
+        err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, modules);
         if (err <= 0) {
                 dso__delete(kernel_dso);
                 kernel_dso = NULL;
@@ -1268,19 +1272,25 @@ static void print_summary(char *filename)
 
 static void annotate_sym(struct dso *dso, struct symbol *sym)
 {
-        char *filename = dso->name;
+        char *filename = dso->name, *d_filename;
         u64 start, end, len;
         char command[PATH_MAX*2];
         FILE *file;
 
         if (!filename)
                 return;
-        if (dso == kernel_dso)
+        if (sym->module)
+                filename = sym->module->path;
+        else if (dso == kernel_dso)
                 filename = vmlinux;
 
         start = sym->obj_start;
         if (!start)
                 start = sym->start;
+        if (full_paths)
+                d_filename = filename;
+        else
+                d_filename = basename(filename);
 
         end = start + sym->end - sym->start + 1;
         len = sym->end - sym->start;
@@ -1291,13 +1301,14 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
         }
 
         printf("\n\n------------------------------------------------\n");
-        printf(" Percent |      Source code & Disassembly of %s\n", filename);
+        printf(" Percent |      Source code & Disassembly of %s\n", d_filename);
         printf("------------------------------------------------\n");
 
         if (verbose >= 2)
                 printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
 
-        sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", (u64)start, (u64)end, filename);
+        sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
+                        (u64)start, (u64)end, filename, filename);
 
         if (verbose >= 3)
                 printf("doing: %s\n", command);
@@ -1472,8 +1483,12 @@ static const struct option options[] = {
         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                     "dump raw trace in ASCII"),
         OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+        OPT_BOOLEAN('m', "modules", &modules,
+                    "load module symbols - WARNING: use only with -k and LIVE kernel"),
         OPT_BOOLEAN('l', "print-line", &print_line,
                     "print matching source lines (may be slow)"),
+        OPT_BOOLEAN('P', "full-paths", &full_paths,
+                    "Don't shorten the displayed pathnames"),
         OPT_END()
 };