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* [PATCH 1/6] perf symbols: Remove unrelated actions from dso__load_kernel_sym
@ 2009-11-20 22:51 Arnaldo Carvalho de Melo
  2009-11-20 22:51 ` [PATCH 2/6] perf symbols: filename__read_build_id should look at .notes section too Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

It should just load kernel symbols, not load the list of modules. There
are more stuff to move to other routines, but lets do it in several
steps.

End goal is to be able to defer symbol table loading till we find a hit
for that map address range. So that the kernel & modules are handled
just like all the other DSOs in the system.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-annotate.c |    5 ++-
 tools/perf/builtin-report.c   |    3 +-
 tools/perf/builtin-top.c      |   10 ++++++++-
 tools/perf/util/data_map.c    |    2 +-
 tools/perf/util/symbol.c      |   46 +++++++++++++++++------------------------
 tools/perf/util/symbol.h      |    7 +++--
 6 files changed, 38 insertions(+), 35 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 77d50a6..b6da147 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -33,6 +33,7 @@ static int		input;
 static int		full_paths;
 
 static int		print_line;
+static bool		use_modules;
 
 static unsigned long	page_size;
 static unsigned long	mmap_window = 32;
@@ -636,7 +637,7 @@ static int __cmd_annotate(void)
 		exit(0);
 	}
 
-	if (load_kernel(symbol_filter) < 0) {
+	if (load_kernel(symbol_filter, use_modules) < 0) {
 		perror("failed to load kernel symbols");
 		return EXIT_FAILURE;
 	}
@@ -742,7 +743,7 @@ static const struct option options[] = {
 	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 		    "dump raw trace in ASCII"),
 	OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
-	OPT_BOOLEAN('m', "modules", &modules,
+	OPT_BOOLEAN('m', "modules", &use_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)"),
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 1a806d5..0af4840 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -38,6 +38,7 @@ static char		*dso_list_str, *comm_list_str, *sym_list_str,
 static struct strlist	*dso_list, *comm_list, *sym_list;
 
 static int		force;
+static bool		use_modules;
 
 static int		full_paths;
 static int		show_nr_samples;
@@ -1023,7 +1024,7 @@ static const struct option options[] = {
 		    "dump raw trace in ASCII"),
 	OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
 	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
-	OPT_BOOLEAN('m', "modules", &modules,
+	OPT_BOOLEAN('m', "modules", &use_modules,
 		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
 	OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
 		    "Show a column with the number of samples"),
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 6d770ac..48cc108 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -953,8 +953,16 @@ static int parse_symbols(void)
 	if (kernel == NULL)
 		return -1;
 
+	if (dsos__load_modules() < 0)
+		pr_debug("Couldn't read the complete list of modules, "
+			 "continuing...\n");
+
+	if (dsos__load_modules_sym(symbol_filter) < 0)
+		pr_warning("Failed to read module symbols, continuing...\n");
+
 	if (dso__load_kernel_sym(kernel, symbol_filter, 1) <= 0)
-		return -1;
+		pr_debug("Couldn't read the complete list of kernel symbols, "
+			 "continuing...\n");
 
 	if (dump_symtab)
 		dsos__fprintf(stderr);
diff --git a/tools/perf/util/data_map.c b/tools/perf/util/data_map.c
index 5543e7d..a444a26 100644
--- a/tools/perf/util/data_map.c
+++ b/tools/perf/util/data_map.c
@@ -171,7 +171,7 @@ int mmap_dispatch_perf_file(struct perf_header **pheader,
 		goto out_delete;
 
 	err = -ENOMEM;
-	if (load_kernel(NULL) < 0) {
+	if (load_kernel(NULL, 1) < 0) {
 		pr_err("failed to load kernel symbols\n");
 		goto out_delete;
 	}
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 4d75e74..3b23c18 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1230,7 +1230,7 @@ failure:
 	return -1;
 }
 
-static int dsos__load_modules_sym(symbol_filter_t filter)
+int dsos__load_modules_sym(symbol_filter_t filter)
 {
 	struct utsname uts;
 	char modules_path[PATH_MAX];
@@ -1352,33 +1352,18 @@ static int dso__load_vmlinux(struct dso *self, struct map *map,
 	return err;
 }
 
-int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter, int use_modules)
+int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter,
+			 int use_modules)
 {
-	int err = -1;
+	int err;
 
 	kernel_map = map__new2(0, self);
 	if (kernel_map == NULL)
-		goto out_delete_dso;
+		return -1;
 
 	kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
 
-	if (use_modules && dsos__load_modules() < 0) {
-		pr_warning("Failed to load list of modules in use! "
-			   "Continuing...\n");
-		use_modules = 0;
-	}
-
 	err = dso__load_vmlinux(self, kernel_map, self->name, filter);
-	if (err > 0 && use_modules) {
-		int syms = dsos__load_modules_sym(filter);
-
-		if (syms < 0)
-			pr_warning("Failed to read module symbols!"
-				   " Continuing...\n");
-		else
-			err += syms;
-	}
-
 	if (err <= 0)
 		err = kernel_maps__load_kallsyms(filter, use_modules);
 
@@ -1404,17 +1389,12 @@ int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter, int use_modul
 	}
 
 	return err;
-
-out_delete_dso:
-	dso__delete(self);
-	return -1;
 }
 
 LIST_HEAD(dsos);
 struct dso	*vdso;
 
 const char	*vmlinux_name = "vmlinux";
-int		modules;
 
 static void dsos__add(struct dso *dso)
 {
@@ -1488,14 +1468,26 @@ struct dso *dsos__load_kernel(void)
 	return kernel;
 }
 
-int load_kernel(symbol_filter_t filter)
+int load_kernel(symbol_filter_t filter, bool use_modules)
 {
 	struct dso *kernel = dsos__load_kernel();
 
 	if (kernel == NULL)
 		return -1;
 
-	return dso__load_kernel_sym(kernel, filter, modules);
+	if (use_modules) {
+		if (dsos__load_modules() < 0)
+			pr_warning("Failed to load list of modules in use, "
+				   "continuing...\n");
+		else if (dsos__load_modules_sym(filter) < 0)
+			pr_warning("Failed to read module symbols, "
+				   "continuing...\n");
+	}
+
+	if (dso__load_kernel_sym(kernel, filter, use_modules) < 0)
+		pr_warning("Failed to read kernel symbols, continuing...\n");
+
+	return 0;
 }
 
 void symbol__init(unsigned int priv_size)
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index f0593a6..3d9d346 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -78,9 +78,11 @@ void dso__delete(struct dso *self);
 struct symbol *dso__find_symbol(struct dso *self, u64 ip);
 
 int dsos__load_modules(void);
+int dsos__load_modules_sym(symbol_filter_t filter);
 struct dso *dsos__findnew(const char *name);
 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter);
-int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter, int modules);
+int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter,
+			 int use_modules);
 void dsos__fprintf(FILE *fp);
 size_t dsos__fprintf_buildid(FILE *fp);
 
@@ -95,7 +97,7 @@ bool dsos__read_build_ids(void);
 int build_id__sprintf(u8 *self, int len, char *bf);
 
 struct dso *dsos__load_kernel(void);
-int load_kernel(symbol_filter_t filter);
+int load_kernel(symbol_filter_t filter, bool use_modules);
 
 void symbol__init(unsigned int priv_size);
 
@@ -103,5 +105,4 @@ extern struct list_head dsos;
 extern struct map *kernel_map;
 extern struct dso *vdso;
 extern const char *vmlinux_name;
-extern int   modules;
 #endif /* __PERF_SYMBOL */
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 2/6] perf symbols: filename__read_build_id should look at .notes section too
  2009-11-20 22:51 [PATCH 1/6] perf symbols: Remove unrelated actions from dso__load_kernel_sym Arnaldo Carvalho de Melo
@ 2009-11-20 22:51 ` Arnaldo Carvalho de Melo
  2009-11-20 22:51   ` [PATCH 3/6] perf symbols: Introduce dso__build_id_equal Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

In the kernel we have more than one notes section, so the linker script
combines all and puts them into a ".notes" combined section. So we need
to look at both sections and also traverse them looking at multiple
GElf_Nhdr entries till we find the one we want, with the build_id.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c |   47 +++++++++++++++++++++++++++++++++++++--------
 1 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 3b23c18..d220308 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -899,13 +899,19 @@ bool dsos__read_build_ids(void)
 	return have_build_id;
 }
 
+/*
+ * Align offset to 4 bytes as needed for note name and descriptor data.
+ */
+#define NOTE_ALIGN(n) (((n) + 3) & -4U)
+
 int filename__read_build_id(const char *filename, void *bf, size_t size)
 {
 	int fd, err = -1;
 	GElf_Ehdr ehdr;
 	GElf_Shdr shdr;
-	Elf_Data *build_id_data;
+	Elf_Data *data;
 	Elf_Scn *sec;
+	void *ptr;
 	Elf *elf;
 
 	if (size < BUILD_ID_SIZE)
@@ -928,14 +934,37 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
 
 	sec = elf_section_by_name(elf, &ehdr, &shdr,
 				  ".note.gnu.build-id", NULL);
-	if (sec == NULL)
-		goto out_elf_end;
+	if (sec == NULL) {
+		sec = elf_section_by_name(elf, &ehdr, &shdr,
+					  ".notes", NULL);
+		if (sec == NULL)
+			goto out_elf_end;
+	}
 
-	build_id_data = elf_getdata(sec, NULL);
-	if (build_id_data == NULL)
+	data = elf_getdata(sec, NULL);
+	if (data == NULL)
 		goto out_elf_end;
-	memcpy(bf, build_id_data->d_buf + 16, BUILD_ID_SIZE);
-	err = BUILD_ID_SIZE;
+
+	ptr = data->d_buf;
+	while (ptr < (data->d_buf + data->d_size)) {
+		GElf_Nhdr *nhdr = ptr;
+		int namesz = NOTE_ALIGN(nhdr->n_namesz),
+		    descsz = NOTE_ALIGN(nhdr->n_descsz);
+		const char *name;
+
+		ptr += sizeof(*nhdr);
+		name = ptr;
+		ptr += namesz;
+		if (nhdr->n_type == NT_GNU_BUILD_ID &&
+		    nhdr->n_namesz == sizeof("GNU")) {
+			if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
+				memcpy(bf, ptr, BUILD_ID_SIZE);
+				err = BUILD_ID_SIZE;
+				break;
+			}
+		}
+		ptr += descsz;
+	}
 out_elf_end:
 	elf_end(elf);
 out_close:
@@ -963,8 +992,8 @@ int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
 		if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
 			break;
 
-		namesz = (nhdr.n_namesz + 3) & -4U;
-		descsz = (nhdr.n_descsz + 3) & -4U;
+		namesz = NOTE_ALIGN(nhdr.n_namesz);
+		descsz = NOTE_ALIGN(nhdr.n_descsz);
 		if (nhdr.n_type == NT_GNU_BUILD_ID &&
 		    nhdr.n_namesz == sizeof("GNU")) {
 			if (read(fd, bf, namesz) != namesz)
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 3/6] perf symbols: Introduce dso__build_id_equal
  2009-11-20 22:51 ` [PATCH 2/6] perf symbols: filename__read_build_id should look at .notes section too Arnaldo Carvalho de Melo
@ 2009-11-20 22:51   ` Arnaldo Carvalho de Melo
  2009-11-20 22:51     ` [PATCH 4/6] perf symbols: Do lazy symtab loading for the kernel & modules too Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Will be used in more places.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index d220308..c324bdf 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -884,6 +884,11 @@ out_close:
 	return err;
 }
 
+static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
+{
+	return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
+}
+
 bool dsos__read_build_ids(void)
 {
 	bool have_build_id = false;
@@ -1099,8 +1104,7 @@ more:
 						    sizeof(build_id)) < 0)
 				goto more;
 compare_build_id:
-			if (memcmp(build_id, self->build_id,
-				   sizeof(self->build_id)) != 0)
+			if (!dso__build_id_equal(self, build_id))
 				goto more;
 		}
 
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 4/6] perf symbols: Do lazy symtab loading for the kernel & modules too
  2009-11-20 22:51   ` [PATCH 3/6] perf symbols: Introduce dso__build_id_equal Arnaldo Carvalho de Melo
@ 2009-11-20 22:51     ` Arnaldo Carvalho de Melo
  2009-11-20 22:51       ` [PATCH 5/6] perf symbols: Check vmlinux buildid Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Just like we do with the other DSOs. This also simplifies the
kernel_maps setup process, now all that the tools need to do is to call
kernel_maps__init and the maps for the modules and kernel will be
created, then, later, when kernel_maps__find_symbol() is used, it will
also call maps__find_symbol that already checks if the symtab was
loaded, loading it if needed.

Now if one does 'perf top --hide_kernel_symbols' we won't pay the price
of loading the (many) symbols in /proc/kallsyms or vmlinux.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-annotate.c |    8 +-
 tools/perf/builtin-report.c   |    6 +-
 tools/perf/builtin-top.c      |   35 ++-------
 tools/perf/util/data_map.c    |    4 +-
 tools/perf/util/event.h       |    3 +
 tools/perf/util/header.c      |    6 +-
 tools/perf/util/map.c         |   23 ++++++
 tools/perf/util/symbol.c      |  173 ++++++++++++++---------------------------
 tools/perf/util/symbol.h      |    9 +--
 tools/perf/util/thread.h      |    3 +-
 10 files changed, 109 insertions(+), 161 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index b6da147..2031527 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -157,7 +157,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 
 	if (event->header.misc & PERF_RECORD_MISC_KERNEL) {
 		level = 'k';
-		sym = kernel_maps__find_symbol(ip, &map);
+		sym = kernel_maps__find_symbol(ip, &map, symbol_filter);
 		dump_printf(" ...... dso: %s\n",
 			    map ? map->dso->long_name : "<not found>");
 	} else if (event->header.misc & PERF_RECORD_MISC_USER) {
@@ -637,9 +637,9 @@ static int __cmd_annotate(void)
 		exit(0);
 	}
 
-	if (load_kernel(symbol_filter, use_modules) < 0) {
-		perror("failed to load kernel symbols");
-		return EXIT_FAILURE;
+	if (kernel_maps__init(use_modules) < 0) {
+		pr_err("failed to create kernel maps for symbol resolution\b");
+		return -1;
 	}
 
 remap:
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0af4840..0d39e80 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -449,7 +449,7 @@ got_map:
 		 * trick of looking in the whole kernel symbol list.
 		 */
 		if ((long long)ip < 0)
-			return kernel_maps__find_symbol(ip, mapp);
+			return kernel_maps__find_symbol(ip, mapp, NULL);
 	}
 	dump_printf(" ...... dso: %s\n",
 		    map ? map->dso->long_name : "<not found>");
@@ -496,7 +496,7 @@ static struct symbol **resolve_callchain(struct thread *thread, struct map *map,
 		case PERF_CONTEXT_HV:
 			break;
 		case PERF_CONTEXT_KERNEL:
-			sym = kernel_maps__find_symbol(ip, &map);
+			sym = kernel_maps__find_symbol(ip, &map, NULL);
 			break;
 		default:
 			sym = resolve_symbol(thread, &map, &ip);
@@ -716,7 +716,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 
 	if (cpumode == PERF_RECORD_MISC_KERNEL) {
 		level = 'k';
-		sym = kernel_maps__find_symbol(ip, &map);
+		sym = kernel_maps__find_symbol(ip, &map, NULL);
 		dump_printf(" ...... dso: %s\n",
 			    map ? map->dso->long_name : "<not found>");
 	} else if (cpumode == PERF_RECORD_MISC_USER) {
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 48cc108..ea49c2e 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -830,6 +830,8 @@ static void handle_keypress(int c)
 		case 'q':
 		case 'Q':
 			printf("exiting.\n");
+			if (dump_symtab)
+				dsos__fprintf(stderr);
 			exit(0);
 		case 's':
 			prompt_symbol(&sym_filter_entry, "Enter details symbol");
@@ -946,30 +948,6 @@ static int symbol_filter(struct map *map, struct symbol *sym)
 	return 0;
 }
 
-static int parse_symbols(void)
-{
-	struct dso *kernel = dsos__load_kernel();
-
-	if (kernel == NULL)
-		return -1;
-
-	if (dsos__load_modules() < 0)
-		pr_debug("Couldn't read the complete list of modules, "
-			 "continuing...\n");
-
-	if (dsos__load_modules_sym(symbol_filter) < 0)
-		pr_warning("Failed to read module symbols, continuing...\n");
-
-	if (dso__load_kernel_sym(kernel, symbol_filter, 1) <= 0)
-		pr_debug("Couldn't read the complete list of kernel symbols, "
-			 "continuing...\n");
-
-	if (dump_symtab)
-		dsos__fprintf(stderr);
-
-	return 0;
-}
-
 static void event__process_sample(const event_t *self, int counter)
 {
 	u64 ip = self->ip.ip;
@@ -1012,7 +990,7 @@ static void event__process_sample(const event_t *self, int counter)
 		if (hide_kernel_symbols)
 			return;
 
-		sym = kernel_maps__find_symbol(ip, &map);
+		sym = kernel_maps__find_symbol(ip, &map, symbol_filter);
 		if (sym == NULL)
 			return;
 		break;
@@ -1339,7 +1317,7 @@ static const struct option options[] = {
 
 int cmd_top(int argc, const char **argv, const char *prefix __used)
 {
-	int counter;
+	int counter, err;
 
 	page_size = sysconf(_SC_PAGE_SIZE);
 
@@ -1363,10 +1341,11 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
 	if (delay_secs < 1)
 		delay_secs = 1;
 
-	parse_symbols();
+	err = kernel_maps__init(true);
+	if (err < 0)
+		return err;
 	parse_source(sym_filter_entry);
 
-
 	/*
 	 * User specified count overrides default frequency.
 	 */
diff --git a/tools/perf/util/data_map.c b/tools/perf/util/data_map.c
index a444a26..e7b6c2b 100644
--- a/tools/perf/util/data_map.c
+++ b/tools/perf/util/data_map.c
@@ -171,8 +171,8 @@ int mmap_dispatch_perf_file(struct perf_header **pheader,
 		goto out_delete;
 
 	err = -ENOMEM;
-	if (load_kernel(NULL, 1) < 0) {
-		pr_err("failed to load kernel symbols\n");
+	if (kernel_maps__init(true) < 0) {
+		pr_err("failed to setup the kernel maps to resolve symbols\n");
 		goto out_delete;
 	}
 
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 34c6fcb..f1e3926 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -115,10 +115,13 @@ typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
 void map__init(struct map *self, u64 start, u64 end, u64 pgoff,
 	       struct dso *dso);
 struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
+void map__delete(struct map *self);
 struct map *map__clone(struct map *self);
 int map__overlap(struct map *l, struct map *r);
 size_t map__fprintf(struct map *self, FILE *fp);
 struct symbol *map__find_symbol(struct map *self, u64 ip, symbol_filter_t filter);
+void map__fixup_start(struct map *self);
+void map__fixup_end(struct map *self);
 
 int event__synthesize_thread(pid_t pid, int (*process)(event_t *event));
 void event__synthesize_threads(int (*process)(event_t *event));
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d5c81eb..ac3410b 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -253,11 +253,11 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
 
 		buildid_sec = &feat_sec[idx++];
 
-		dsos__load_kernel();
 		/*
-		 * Read the list of loaded modules with its build_ids
+		 * Read the kernel buildid nad the list of loaded modules with
+		 * its build_ids:
 		 */
-		dsos__load_modules();
+		kernel_maps__init(true);
 
 		/* Write build-ids */
 		buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 94ca950..0941232 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -75,6 +75,29 @@ out_delete:
 	return NULL;
 }
 
+void map__delete(struct map *self)
+{
+	free(self);
+}
+
+void map__fixup_start(struct map *self)
+{
+	struct rb_node *nd = rb_first(&self->dso->syms);
+	if (nd != NULL) {
+		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+		self->start = sym->start;
+	}
+}
+
+void map__fixup_end(struct map *self)
+{
+	struct rb_node *nd = rb_last(&self->dso->syms);
+	if (nd != NULL) {
+		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+		self->end = sym->end;
+	}
+}
+
 #define DSO__DELETED "(deleted)"
 
 struct symbol *
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c324bdf..cb086cb 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -27,6 +27,8 @@ static void dsos__add(struct dso *dso);
 static struct dso *dsos__find(const char *name);
 static struct map *map__new2(u64 start, struct dso *dso);
 static void kernel_maps__insert(struct map *map);
+static int dso__load_kernel_sym(struct dso *self, struct map *map,
+				symbol_filter_t filter);
 unsigned int symbol__priv_size;
 
 static struct rb_root kernel_maps;
@@ -69,12 +71,6 @@ static void kernel_maps__fixup_end(void)
 		curr = rb_entry(nd, struct map, rb_node);
 		prev->end = curr->start - 1;
 	}
-
-	nd = rb_last(&curr->dso->syms);
-	if (nd) {
-		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
-		curr->end = sym->end;
-	}
 }
 
 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
@@ -324,7 +320,7 @@ out_failure:
  * kernel range is broken in several maps, named [kernel].N, as we don't have
  * the original ELF section names vmlinux have.
  */
-static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules)
+static int kernel_maps__split_kallsyms(symbol_filter_t filter)
 {
 	struct map *map = kernel_map;
 	struct symbol *pos;
@@ -340,9 +336,6 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules)
 
 		module = strchr(pos->name, '\t');
 		if (module) {
-			if (!use_modules)
-				goto delete_symbol;
-
 			*module++ = '\0';
 
 			if (strcmp(map->dso->name, module)) {
@@ -382,7 +375,6 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules)
 		}
 
 		if (filter && filter(map, pos)) {
-delete_symbol:
 			rb_erase(&pos->rb_node, &kernel_map->dso->syms);
 			symbol__delete(pos);
 		} else {
@@ -398,17 +390,18 @@ delete_symbol:
 }
 
 
-static int kernel_maps__load_kallsyms(symbol_filter_t filter, int use_modules)
+static int kernel_maps__load_kallsyms(symbol_filter_t filter)
 {
 	if (kernel_maps__load_all_kallsyms())
 		return -1;
 
 	dso__fixup_sym_end(kernel_map->dso);
+	kernel_map->dso->origin = DSO__ORIG_KERNEL;
 
-	return kernel_maps__split_kallsyms(filter, use_modules);
+	return kernel_maps__split_kallsyms(filter);
 }
 
-static size_t kernel_maps__fprintf(FILE *fp)
+size_t kernel_maps__fprintf(FILE *fp)
 {
 	size_t printed = fprintf(fp, "Kernel maps:\n");
 	struct rb_node *nd;
@@ -1042,13 +1035,17 @@ char dso__symtab_origin(const struct dso *self)
 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
 {
 	int size = PATH_MAX;
-	char *name = malloc(size);
+	char *name;
 	u8 build_id[BUILD_ID_SIZE];
 	int ret = -1;
 	int fd;
 
 	self->loaded = 1;
 
+	if (self->kernel)
+		return dso__load_kernel_sym(self, map, filter);
+
+	name = malloc(size);
 	if (!name)
 		return -1;
 
@@ -1139,7 +1136,8 @@ static void kernel_maps__insert(struct map *map)
 	maps__insert(&kernel_maps, map);
 }
 
-struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp)
+struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp,
+					symbol_filter_t filter)
 {
 	struct map *map = maps__find(&kernel_maps, ip);
 
@@ -1148,7 +1146,7 @@ struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp)
 
 	if (map) {
 		ip = map->map_ip(map, ip);
-		return map->dso->find_symbol(map->dso, ip);
+		return map__find_symbol(map, ip, filter);
 	}
 
 	return NULL;
@@ -1168,28 +1166,9 @@ struct map *kernel_maps__find_by_dso_name(const char *name)
 	return NULL;
 }
 
-static int dso__load_module_sym(struct dso *self, struct map *map,
-				symbol_filter_t filter)
-{
-	int err = 0, fd = open(self->long_name, O_RDONLY);
-
-	self->loaded = 1;
-
-	if (fd < 0) {
-		pr_err("%s: cannot open %s\n", __func__, self->long_name);
-		return err;
-	}
-
-	err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1);
-	close(fd);
-
-	return err;
-}
-
-static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter)
+static int dsos__set_modules_path_dir(char *dirname)
 {
 	struct dirent *dent;
-	int nr_symbols = 0, err;
 	DIR *dir = opendir(dirname);
 
 	if (!dir) {
@@ -1207,14 +1186,12 @@ static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter)
 
 			snprintf(path, sizeof(path), "%s/%s",
 				 dirname, dent->d_name);
-			err = dsos__load_modules_sym_dir(path, filter);
-			if (err < 0)
+			if (dsos__set_modules_path_dir(path) < 0)
 				goto failure;
 		} else {
 			char *dot = strrchr(dent->d_name, '.'),
 			     dso_name[PATH_MAX];
 			struct map *map;
-			struct rb_node *last;
 			char *long_name;
 
 			if (dot == NULL || strcmp(dot, ".ko"))
@@ -1234,36 +1211,16 @@ static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter)
 			if (long_name == NULL)
 				goto failure;
 			dso__set_long_name(map->dso, long_name);
-			dso__set_basename(map->dso);
-
-			err = dso__load_module_sym(map->dso, map, filter);
-			if (err < 0)
-				goto failure;
-			last = rb_last(&map->dso->syms);
-			if (last) {
-				struct symbol *sym;
-				/*
-				 * We do this here as well, even having the
-				 * symbol size found in the symtab because
-				 * misannotated ASM symbols may have the size
-				 * set to zero.
-				 */
-				dso__fixup_sym_end(map->dso);
-
-				sym = rb_entry(last, struct symbol, rb_node);
-				map->end = map->start + sym->end;
-			}
 		}
-		nr_symbols += err;
 	}
 
-	return nr_symbols;
+	return 0;
 failure:
 	closedir(dir);
 	return -1;
 }
 
-int dsos__load_modules_sym(symbol_filter_t filter)
+static int dsos__set_modules_path(void)
 {
 	struct utsname uts;
 	char modules_path[PATH_MAX];
@@ -1274,7 +1231,7 @@ int dsos__load_modules_sym(symbol_filter_t filter)
 	snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
 		 uts.release);
 
-	return dsos__load_modules_sym_dir(modules_path, filter);
+	return dsos__set_modules_path_dir(modules_path);
 }
 
 /*
@@ -1296,7 +1253,7 @@ static struct map *map__new2(u64 start, struct dso *dso)
 	return self;
 }
 
-int dsos__load_modules(void)
+static int kernel_maps__create_module_maps(void)
 {
 	char *line = NULL;
 	size_t n;
@@ -1360,7 +1317,13 @@ int dsos__load_modules(void)
 	free(line);
 	fclose(file);
 
-	return 0;
+	/*
+	 * Now that we have all sorted out, just set the ->end of all
+	 * maps:
+	 */
+	kernel_maps__fixup_end();
+
+	return dsos__set_modules_path();
 
 out_delete_line:
 	free(line);
@@ -1385,40 +1348,17 @@ static int dso__load_vmlinux(struct dso *self, struct map *map,
 	return err;
 }
 
-int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter,
-			 int use_modules)
+static int dso__load_kernel_sym(struct dso *self, struct map *map,
+				symbol_filter_t filter)
 {
-	int err;
+	int err = dso__load_vmlinux(self, map, self->name, filter);
 
-	kernel_map = map__new2(0, self);
-	if (kernel_map == NULL)
-		return -1;
-
-	kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
-
-	err = dso__load_vmlinux(self, kernel_map, self->name, filter);
 	if (err <= 0)
-		err = kernel_maps__load_kallsyms(filter, use_modules);
+		err = kernel_maps__load_kallsyms(filter);
 
 	if (err > 0) {
-		struct rb_node *node = rb_first(&self->syms);
-		struct symbol *sym = rb_entry(node, struct symbol, rb_node);
-
-		kernel_map->start = sym->start;
-		node = rb_last(&self->syms);
-		sym = rb_entry(node, struct symbol, rb_node);
-		kernel_map->end = sym->end;
-
-		self->origin = DSO__ORIG_KERNEL;
-		kernel_maps__insert(kernel_map);
-		/*
-		 * Now that we have all sorted out, just set the ->end of all
-		 * maps:
-		 */
-		kernel_maps__fixup_end();
-
-		if (verbose)
-			kernel_maps__fprintf(stderr);
+		map__fixup_start(map);
+		map__fixup_end(map);
 	}
 
 	return err;
@@ -1479,46 +1419,51 @@ size_t dsos__fprintf_buildid(FILE *fp)
 	return ret;
 }
 
-struct dso *dsos__load_kernel(void)
+static int kernel_maps__create_kernel_map(void)
 {
 	struct dso *kernel = dso__new(vmlinux_name);
 
 	if (kernel == NULL)
-		return NULL;
+		return -1;
+
+	kernel_map = map__new2(0, kernel);
+	if (kernel_map == NULL)
+		goto out_delete_kernel_dso;
+
+	kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
 
 	kernel->short_name = "[kernel]";
+	kernel->kernel = 1;
 	vdso = dso__new("[vdso]");
-	if (!vdso)
-		return NULL;
+	if (vdso == NULL)
+		goto out_delete_kernel_map;
 
 	if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id,
 				 sizeof(kernel->build_id)) == 0)
 		kernel->has_build_id = true;
 
+	kernel_maps__insert(kernel_map);
 	dsos__add(kernel);
 	dsos__add(vdso);
 
-	return kernel;
+	return 0;
+
+out_delete_kernel_map:
+	map__delete(kernel_map);
+	kernel_map = NULL;
+out_delete_kernel_dso:
+	dso__delete(kernel);
+	return -1;
 }
 
-int load_kernel(symbol_filter_t filter, bool use_modules)
+int kernel_maps__init(bool use_modules)
 {
-	struct dso *kernel = dsos__load_kernel();
-
-	if (kernel == NULL)
+	if (kernel_maps__create_kernel_map() < 0)
 		return -1;
 
-	if (use_modules) {
-		if (dsos__load_modules() < 0)
-			pr_warning("Failed to load list of modules in use, "
-				   "continuing...\n");
-		else if (dsos__load_modules_sym(filter) < 0)
-			pr_warning("Failed to read module symbols, "
-				   "continuing...\n");
-	}
-
-	if (dso__load_kernel_sym(kernel, filter, use_modules) < 0)
-		pr_warning("Failed to read kernel symbols, continuing...\n");
+	if (use_modules && kernel_maps__create_module_maps() < 0)
+		pr_warning("Failed to load list of modules in use, "
+			   "continuing...\n");
 
 	return 0;
 }
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 3d9d346..7a12904 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -64,6 +64,7 @@ struct dso {
 	u8		 slen_calculated:1;
 	u8		 loaded:1;
 	u8		 has_build_id:1;
+	u8		 kernel:1;
 	unsigned char	 origin;
 	u8		 build_id[BUILD_ID_SIZE];
 	u16		 long_name_len;
@@ -77,12 +78,8 @@ void dso__delete(struct dso *self);
 
 struct symbol *dso__find_symbol(struct dso *self, u64 ip);
 
-int dsos__load_modules(void);
-int dsos__load_modules_sym(symbol_filter_t filter);
 struct dso *dsos__findnew(const char *name);
 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter);
-int dso__load_kernel_sym(struct dso *self, symbol_filter_t filter,
-			 int use_modules);
 void dsos__fprintf(FILE *fp);
 size_t dsos__fprintf_buildid(FILE *fp);
 
@@ -96,8 +93,8 @@ int sysfs__read_build_id(const char *filename, void *bf, size_t size);
 bool dsos__read_build_ids(void);
 int build_id__sprintf(u8 *self, int len, char *bf);
 
-struct dso *dsos__load_kernel(void);
-int load_kernel(symbol_filter_t filter, bool use_modules);
+int kernel_maps__init(bool use_modules);
+size_t kernel_maps__fprintf(FILE *fp);
 
 void symbol__init(unsigned int priv_size);
 
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 53addd7..e4b8d43 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -26,7 +26,8 @@ size_t threads__fprintf(FILE *fp);
 void maps__insert(struct rb_root *maps, struct map *map);
 struct map *maps__find(struct rb_root *maps, u64 ip);
 
-struct symbol *kernel_maps__find_symbol(const u64 ip, struct map **mapp);
+struct symbol *kernel_maps__find_symbol(const u64 ip, struct map **mapp,
+					symbol_filter_t filter);
 struct map *kernel_maps__find_by_dso_name(const char *name);
 
 static inline struct map *thread__find_map(struct thread *self, u64 ip)
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 5/6] perf symbols: Check vmlinux buildid
  2009-11-20 22:51     ` [PATCH 4/6] perf symbols: Do lazy symtab loading for the kernel & modules too Arnaldo Carvalho de Melo
@ 2009-11-20 22:51       ` Arnaldo Carvalho de Melo
  2009-11-20 22:51         ` [PATCH 6/6] perf symbols: Change the kernel DSO name if it comes from kallsyms Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

E.g.:

[root@doppio linux-2.6-tip]# perf top -v --vmlinux ../build/tip/vmlinux > /dev/null
build_id in vmlinux is e96699725a47413a50c231864a8e7a8ced40a31b while
expected is 18e7cc53db62a7d35e9d6f6c9ddc23017d38ee9a, ignoring it

I.e. perf top was told to use a vmlinux file that is not the one
currently running on the machine, it ignores it and falls back to using
/proc/kallsyms.

This solves many, at first, mysterious results when people have a stale
vmlinux file while keeping the default of trying to use the vmlinux file
in the current directory in things like 'perf annotate' where the DWARF
info is required and thus we can't use just /proc/kallsyms.

Modules buildids are already being checked as of the previous changeset
in this series, because we are using the default dso__load routine, that
will look at a series of places looking for the best file with a
matching buildid, starting in the -debuginfo directories.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c |   28 ++++++++++++++++++++++++++--
 1 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index cb086cb..9cf6dbc 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1334,13 +1334,37 @@ out_failure:
 static int dso__load_vmlinux(struct dso *self, struct map *map,
 			     const char *vmlinux, symbol_filter_t filter)
 {
-	int err, fd = open(vmlinux, O_RDONLY);
+	int err = -1, fd;
 
-	self->loaded = 1;
+	if (self->has_build_id) {
+		u8 build_id[BUILD_ID_SIZE];
+
+		if (filename__read_build_id(vmlinux, build_id,
+					    sizeof(build_id)) < 0) {
+			pr_debug("No build_id in %s, ignoring it\n", vmlinux);
+			return -1;
+		}
+		if (!dso__build_id_equal(self, build_id)) {
+			char expected_build_id[BUILD_ID_SIZE * 2 + 1],
+			     vmlinux_build_id[BUILD_ID_SIZE * 2 + 1];
+
+			build_id__sprintf(self->build_id,
+					  sizeof(self->build_id),
+					  expected_build_id);
+			build_id__sprintf(build_id, sizeof(build_id),
+					  vmlinux_build_id);
+			pr_debug("build_id in %s is %s while expected is %s, "
+				 "ignoring it\n", vmlinux, vmlinux_build_id,
+				 expected_build_id);
+			return -1;
+		}
+	}
 
+	fd = open(vmlinux, O_RDONLY);
 	if (fd < 0)
 		return -1;
 
+	self->loaded = 1;
 	err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0);
 
 	close(fd);
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 6/6] perf symbols: Change the kernel DSO name if it comes from kallsyms
  2009-11-20 22:51       ` [PATCH 5/6] perf symbols: Check vmlinux buildid Arnaldo Carvalho de Melo
@ 2009-11-20 22:51         ` Arnaldo Carvalho de Melo
  0 siblings, 0 replies; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2009-11-20 22:51 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo,
	Frédéric Weisbecker, Mike Galbraith, Peter Zijlstra,
	Paul Mackerras

From: Arnaldo Carvalho de Melo <acme@redhat.com>

So that the user have a clearer indication about the source of the
symbols, as we only state buildid mismatches in verbose mode, because
'perf top' would overwrite such warning anyway.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 9cf6dbc..48f87f0 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -108,6 +108,8 @@ static size_t symbol__fprintf(struct symbol *self, FILE *fp)
 
 static void dso__set_long_name(struct dso *self, char *name)
 {
+	if (name == NULL)
+		return;
 	self->long_name = name;
 	self->long_name_len = strlen(name);
 }
@@ -1377,8 +1379,11 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map,
 {
 	int err = dso__load_vmlinux(self, map, self->name, filter);
 
-	if (err <= 0)
+	if (err <= 0) {
 		err = kernel_maps__load_kallsyms(filter);
+		if (err > 0)
+                        dso__set_long_name(self, strdup("[kernel.kallsyms]"));
+	}
 
 	if (err > 0) {
 		map__fixup_start(map);
-- 
1.6.2.5


^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-11-20 22:52 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-11-20 22:51 [PATCH 1/6] perf symbols: Remove unrelated actions from dso__load_kernel_sym Arnaldo Carvalho de Melo
2009-11-20 22:51 ` [PATCH 2/6] perf symbols: filename__read_build_id should look at .notes section too Arnaldo Carvalho de Melo
2009-11-20 22:51   ` [PATCH 3/6] perf symbols: Introduce dso__build_id_equal Arnaldo Carvalho de Melo
2009-11-20 22:51     ` [PATCH 4/6] perf symbols: Do lazy symtab loading for the kernel & modules too Arnaldo Carvalho de Melo
2009-11-20 22:51       ` [PATCH 5/6] perf symbols: Check vmlinux buildid Arnaldo Carvalho de Melo
2009-11-20 22:51         ` [PATCH 6/6] perf symbols: Change the kernel DSO name if it comes from kallsyms Arnaldo Carvalho de Melo

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