[PATCH 0/2] Enhance the init of vmlinux_path and add new path

[PATCH 0/2] Enhance the init of vmlinux_path and add new path

[Ekaterina Tumanova]

These pathset improves perf processing of the paths to vmlinux files:
1. it refactors the vmlinux_path__init procedure, to allow a simple
usage in future: instead of adding several lines for every future vmlinux path,
make it possible to simply add a path itself (1 line) to an array.
2. Some distibutions separate debuginfo to vmlinux.debug file. This patchset
adds a path to vmlinux.debug, so that perf could use its symbols.

Ekaterina Tumanova (2):
  perf: Refactor vmlinux_path_init
  perf: add the path to vmlinux.debug

 tools/perf/util/symbol.c | 65 +++++++++++++++++++++++++-----------------------
 1 file changed, 34 insertions(+), 31 deletions(-)

-- 
2.3.9

[PATCH 1/2] perf: Refactor vmlinux_path_init

[Ekaterina Tumanova]

Refactor vmlinux_path_init function to ease subsequent additions of
new vmlinux locations.

Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
---
 tools/perf/util/symbol.c | 64 +++++++++++++++++++++++++-----------------------
 1 file changed, 33 insertions(+), 31 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index cd08027..9335088 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1860,24 +1860,43 @@ static void vmlinux_path__exit(void)
 	zfree(&vmlinux_path);
 }
 
+static const char * const vmlinux_paths[] = {
+	"vmlinux",
+	"/boot/vmlinux"
+};
+
+static const char * const vmlinux_paths_upd[] = {
+	"/boot/vmlinux-%s",
+	"/usr/lib/debug/boot/vmlinux-%s",
+	"/lib/modules/%s/build/vmlinux",
+	"/usr/lib/debug/lib/modules/%s/vmlinux"
+};
+
+static int vmlinux_path__update(const char *new_entry)
+{
+	vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
+	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
+		return -1;
+	++vmlinux_path__nr_entries;
+
+	return 0;
+}
+
 static int vmlinux_path__init(struct perf_env *env)
 {
 	struct utsname uts;
 	char bf[PATH_MAX];
 	char *kernel_version;
+	unsigned int i;
 
-	vmlinux_path = malloc(sizeof(char *) * 6);
+	vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
+			      ARRAY_SIZE(vmlinux_paths_upd)));
 	if (vmlinux_path == NULL)
 		return -1;
 
-	vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
+	for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
+		if (vmlinux_path__update(vmlinux_paths[i]) < 0)
+			goto out_fail;
 
 	/* only try kernel version if no symfs was given */
 	if (symbol_conf.symfs[0] != 0)
@@ -1892,28 +1911,11 @@ static int vmlinux_path__init(struct perf_env *env)
 		kernel_version = uts.release;
 	}
 
-	snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s",
-		 kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-        ++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
-		 kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
+	for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
+		snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
+		if (vmlinux_path__update(bf) < 0)
+			goto out_fail;
+	}
 
 	return 0;
 
-- 
2.3.9

[PATCH 2/2] perf: add the path to vmlinux.debug

[Ekaterina Tumanova]

Currently when debuginfo is separated to vmlinux.debug, it's contents
get ignored. Let's change that and add it to the vmlinux_path list.

Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
---
 tools/perf/util/symbol.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 9335088..8772ff6 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1869,7 +1869,8 @@ static const char * const vmlinux_paths_upd[] = {
 	"/boot/vmlinux-%s",
 	"/usr/lib/debug/boot/vmlinux-%s",
 	"/lib/modules/%s/build/vmlinux",
-	"/usr/lib/debug/lib/modules/%s/vmlinux"
+	"/usr/lib/debug/lib/modules/%s/vmlinux",
+	"/usr/lib/debug/boot/vmlinux-%s.debug"
 };
 
 static int vmlinux_path__update(const char *new_entry)
-- 
2.3.9

Re: [PATCH 1/2] perf: Refactor vmlinux_path_init

[Jiri Olsa]

On Wed, Nov 25, 2015 at 05:32:45PM +0100, Ekaterina Tumanova wrote:
> Refactor vmlinux_path_init function to ease subsequent additions of
> new vmlinux locations.
> 
> Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
> Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka

Re: [PATCH 2/2] perf: add the path to vmlinux.debug

[Jiri Olsa]

On Wed, Nov 25, 2015 at 05:32:46PM +0100, Ekaterina Tumanova wrote:
> Currently when debuginfo is separated to vmlinux.debug, it's contents
> get ignored. Let's change that and add it to the vmlinux_path list.
> 
> Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
> Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka

Re: [PATCH 1/2] perf: Refactor vmlinux_path_init

[Arnaldo Carvalho de Melo]

Em Wed, Nov 25, 2015 at 05:32:45PM +0100, Ekaterina Tumanova escreveu:
> Refactor vmlinux_path_init function to ease subsequent additions of
> new vmlinux locations.
> 
> Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
> Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
> ---
>  tools/perf/util/symbol.c | 64 +++++++++++++++++++++++++-----------------------
>  1 file changed, 33 insertions(+), 31 deletions(-)
> 
> diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
> index cd08027..9335088 100644
> --- a/tools/perf/util/symbol.c
> +++ b/tools/perf/util/symbol.c
> @@ -1860,24 +1860,43 @@ static void vmlinux_path__exit(void)
>  	zfree(&vmlinux_path);
>  }
>  
> +static const char * const vmlinux_paths[] = {
> +	"vmlinux",
> +	"/boot/vmlinux"
> +};
> +
> +static const char * const vmlinux_paths_upd[] = {
> +	"/boot/vmlinux-%s",
> +	"/usr/lib/debug/boot/vmlinux-%s",
> +	"/lib/modules/%s/build/vmlinux",
> +	"/usr/lib/debug/lib/modules/%s/vmlinux"
> +};
> +
> +static int vmlinux_path__update(const char *new_entry)

Changing this to vmlinux_path__add().

> +{
> +	vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
> +	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> +		return -1;
> +	++vmlinux_path__nr_entries;
> +
> +	return 0;
> +}
> +
>  static int vmlinux_path__init(struct perf_env *env)
>  {
>  	struct utsname uts;
>  	char bf[PATH_MAX];
>  	char *kernel_version;
> +	unsigned int i;
>  
> -	vmlinux_path = malloc(sizeof(char *) * 6);
> +	vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
> +			      ARRAY_SIZE(vmlinux_paths_upd)));
>  	if (vmlinux_path == NULL)
>  		return -1;
>  
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -	++vmlinux_path__nr_entries;
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -	++vmlinux_path__nr_entries;
> +	for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
> +		if (vmlinux_path__update(vmlinux_paths[i]) < 0)
> +			goto out_fail;
>  
>  	/* only try kernel version if no symfs was given */
>  	if (symbol_conf.symfs[0] != 0)
> @@ -1892,28 +1911,11 @@ static int vmlinux_path__init(struct perf_env *env)
>  		kernel_version = uts.release;
>  	}
>  
> -	snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version);
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -	++vmlinux_path__nr_entries;
> -	snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s",
> -		 kernel_version);
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -        ++vmlinux_path__nr_entries;
> -	snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version);
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -	++vmlinux_path__nr_entries;
> -	snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
> -		 kernel_version);
> -	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
> -	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
> -		goto out_fail;
> -	++vmlinux_path__nr_entries;
> +	for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
> +		snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
> +		if (vmlinux_path__update(bf) < 0)
> +			goto out_fail;
> +	}
>  
>  	return 0;
>  
> -- 
> 2.3.9

Re: [PATCH 0/2] Enhance the init of vmlinux_path and add new path

[Arnaldo Carvalho de Melo]

Em Wed, Nov 25, 2015 at 05:32:44PM +0100, Ekaterina Tumanova escreveu:
> These pathset improves perf processing of the paths to vmlinux files:
> 1. it refactors the vmlinux_path__init procedure, to allow a simple
> usage in future: instead of adding several lines for every future vmlinux path,
> make it possible to simply add a path itself (1 line) to an array.
> 2. Some distibutions separate debuginfo to vmlinux.debug file. This patchset
> adds a path to vmlinux.debug, so that perf could use its symbols.
> 
> Ekaterina Tumanova (2):
>   perf: Refactor vmlinux_path_init
>   perf: add the path to vmlinux.debug

Applied both, after renaming vmlinux_path__update() to
vmlinux_path__add(), as this "adds" entries to vmlinux_path.

- Arnaldo

[tip:perf/core] perf symbols: Refactor vmlinux_path__init() to ease path additions

[tip-bot for Ekaterina Tumanova]

Commit-ID:  aac4864727f4b3838ec1c03277bbc47a237b7516
Gitweb:     http://git.kernel.org/tip/aac4864727f4b3838ec1c03277bbc47a237b7516
Author:     Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
AuthorDate: Wed, 25 Nov 2015 17:32:45 +0100
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 26 Nov 2015 16:49:29 -0300

perf symbols: Refactor vmlinux_path__init() to ease path additions

Refactor vmlinux_path__init() to ease subsequent additions of new
vmlinux locations.

Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1448469166-61363-2-git-send-email-tumanova@linux.vnet.ibm.com
[ Rename vmlinux_path__update() to vmlinux_path__add() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c | 64 +++++++++++++++++++++++++-----------------------
 1 file changed, 33 insertions(+), 31 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index cd08027..e2ac6b6 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1860,24 +1860,43 @@ static void vmlinux_path__exit(void)
 	zfree(&vmlinux_path);
 }
 
+static const char * const vmlinux_paths[] = {
+	"vmlinux",
+	"/boot/vmlinux"
+};
+
+static const char * const vmlinux_paths_upd[] = {
+	"/boot/vmlinux-%s",
+	"/usr/lib/debug/boot/vmlinux-%s",
+	"/lib/modules/%s/build/vmlinux",
+	"/usr/lib/debug/lib/modules/%s/vmlinux"
+};
+
+static int vmlinux_path__add(const char *new_entry)
+{
+	vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
+	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
+		return -1;
+	++vmlinux_path__nr_entries;
+
+	return 0;
+}
+
 static int vmlinux_path__init(struct perf_env *env)
 {
 	struct utsname uts;
 	char bf[PATH_MAX];
 	char *kernel_version;
+	unsigned int i;
 
-	vmlinux_path = malloc(sizeof(char *) * 6);
+	vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
+			      ARRAY_SIZE(vmlinux_paths_upd)));
 	if (vmlinux_path == NULL)
 		return -1;
 
-	vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
+	for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
+		if (vmlinux_path__add(vmlinux_paths[i]) < 0)
+			goto out_fail;
 
 	/* only try kernel version if no symfs was given */
 	if (symbol_conf.symfs[0] != 0)
@@ -1892,28 +1911,11 @@ static int vmlinux_path__init(struct perf_env *env)
 		kernel_version = uts.release;
 	}
 
-	snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/usr/lib/debug/boot/vmlinux-%s",
-		 kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-        ++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
-	snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
-		 kernel_version);
-	vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
-	if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
-		goto out_fail;
-	++vmlinux_path__nr_entries;
+	for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
+		snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
+		if (vmlinux_path__add(bf) < 0)
+			goto out_fail;
+	}
 
 	return 0;
 

[tip:perf/core] perf symbols: Add the path to vmlinux.debug

[tip-bot for Ekaterina Tumanova]

Commit-ID:  f55ae9540d16a355e61cb57b035aab9e1ae2da28
Gitweb:     http://git.kernel.org/tip/f55ae9540d16a355e61cb57b035aab9e1ae2da28
Author:     Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
AuthorDate: Wed, 25 Nov 2015 17:32:46 +0100
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 26 Nov 2015 16:50:35 -0300

perf symbols: Add the path to vmlinux.debug

Currently when debuginfo is separated to vmlinux.debug, it's contents
get ignored. Let's change that and add it to the vmlinux_path list.

Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1448469166-61363-3-git-send-email-tumanova@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index e2ac6b6..d51abd2 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1869,7 +1869,8 @@ static const char * const vmlinux_paths_upd[] = {
 	"/boot/vmlinux-%s",
 	"/usr/lib/debug/boot/vmlinux-%s",
 	"/lib/modules/%s/build/vmlinux",
-	"/usr/lib/debug/lib/modules/%s/vmlinux"
+	"/usr/lib/debug/lib/modules/%s/vmlinux",
+	"/usr/lib/debug/boot/vmlinux-%s.debug"
 };
 
 static int vmlinux_path__add(const char *new_entry)