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Subject[tip:perfcounters/urgent] perf_counter tools: Enable kernel module symbol loading in tools
Commit-ID:  429764873cf3fc3e73142872a674bb27cda589c1
Gitweb: http://git.kernel.org/tip/429764873cf3fc3e73142872a674bb27cda589c1
Author: Mike Galbraith <efault@gmx.de>
AuthorDate: Thu, 2 Jul 2009 08:09:46 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 2 Jul 2009 08:42:21 +0200

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>


---
tools/perf/builtin-annotate.c | 25 ++++++++++++++++++++-----
tools/perf/builtin-report.c | 9 ++++++++-
tools/perf/builtin-top.c | 12 ++++++++++--
3 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 8820568..08ea6c5 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()
};

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 38d136f..b44476c 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -46,6 +46,8 @@ static int dump_trace = 0;
static int verbose;
#define eprintf(x...) do { if (verbose) fprintf(stderr, x); } while (0)

+static int modules;
+
static int full_paths;

static unsigned long page_size;
@@ -188,7 +190,7 @@ 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;
@@ -648,6 +650,9 @@ sort__sym_print(FILE *fp, struct hist_entry *self)
ret += fprintf(fp, "[%c] %s",
self->dso == kernel_dso ? 'k' :
self->dso == hypervisor_dso ? 'h' : '.', self->sym->name);
+
+ if (self->sym->module)
+ ret += fprintf(fp, "\t[%s]", self->sym->module->name);
} else {
ret += fprintf(fp, "%#016llx", (u64)self->ip);
}
@@ -1710,6 +1715,8 @@ 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_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol, parent"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 9bb25fc..aa044ea 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -66,6 +66,7 @@ static unsigned int page_size;
static unsigned int mmap_pages = 16;
static int freq = 0;
static int verbose = 0;
+static char *vmlinux = NULL;

static char *sym_filter;
static unsigned long filter_start;
@@ -265,7 +266,10 @@ static void print_sym_table(void)
printf("%9.1f %10ld - ", syme->weight, syme->snap_count);

color_fprintf(stdout, color, "%4.1f%%", pcnt);
- printf(" - %016llx : %s\n", sym->start, sym->name);
+ printf(" - %016llx : %s", sym->start, sym->name);
+ if (sym->module)
+ printf("\t[%s]", sym->module->name);
+ printf("\n");
}
}

@@ -359,12 +363,13 @@ static int parse_symbols(void)
{
struct rb_node *node;
struct symbol *sym;
+ int modules = vmlinux ? 1 : 0;

kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry));
if (kernel_dso == NULL)
return -1;

- if (dso__load_kernel(kernel_dso, NULL, symbol_filter, 1, 0) <= 0)
+ if (dso__load_kernel(kernel_dso, vmlinux, symbol_filter, verbose, modules) <= 0)
goto out_delete_dso;

node = rb_first(&kernel_dso->syms);
@@ -680,6 +685,7 @@ static const struct option options[] = {
"system-wide collection from all CPUs"),
OPT_INTEGER('C', "CPU", &profile_cpu,
"CPU to profile on"),
+ OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_INTEGER('m', "mmap-pages", &mmap_pages,
"number of mmap data pages"),
OPT_INTEGER('r', "realtime", &realtime_prio,
@@ -709,6 +715,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
{
int counter;

+ symbol__init();
+
page_size = sysconf(_SC_PAGE_SIZE);

argc = parse_options(argc, argv, options, top_usage, 0);

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