Re: [PATCH] perf: introduce new two options for objdump.
From: Martin LiÅka
Date: Wed May 20 2015 - 09:02:12 EST
On 05/19/2015 04:33 PM, Arnaldo Carvalho de Melo wrote:
Em Tue, May 19, 2015 at 08:29:58AM -0600, David Ahern escreveu:
On 5/19/15 8:08 AM, Arnaldo Carvalho de Melo wrote:
Em Thu, Jan 29, 2015 at 02:03:46PM +0100, Martin LiÅka escreveu:
Newly introduced options usedfull for off-box usage:
New useful options for off-box usage:
--objdump-prefix: specify prefix to add to the absolute paths
where objdump looks for source files.
--objdump-prefix-strip: indicate how many initial directory names
to strip off the hardwired absolute paths, passed to objdump.
It has no effect without --objdump-prefix.
Does this, for instance, allows one looking at source code + assembly
with debuginfo packages? Is that a usecase you tested this against?
Anyway, sorry for the delay in processing this, fell thru the cracks ;-\
Can you please respin this on top of my current perf/core, at:
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
Perhaps it should be generalized a bit? Right now we have symfs for the
location of the tree for binaries. What about a srcfs for a source tree?
That is a good idea indeed.
- Arnaldo
Hello.
I was motivated to be able to annotate source code, realized out-of-box. More precisely, on a machine A
I run perf record, I moved the report file to machine B and I use these options to annotate source code.
Let's consider source code location
Machine A:
P1=/a/b/c/d/source-files
Machine B:
P2=/x/y/z/source-files
Using just a single option (--objdump-prefix) works, but one how to place source code on machine B to:
/a/b/c/d/x/y/z/source-files
That's quite cumbersome, thus adding second option, one can strip '/a/b/c/d', with --objdump-prefix-strip=4.
Still, no ideal, but it's quite flexible. A new 'srcfs' can used as --objdump-prefix, am I right?
Respun version of patch is attached.
Thanks,
Martin
diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index e9cd39a..4d2a5be 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -90,6 +90,12 @@ OPTIONS
--objdump=<path>::
Path to objdump binary.
+--objdump-prefix=<path>::
+ Specify prefix to add to the absolute paths where objdump looks for source files.
+
+--objdump-prefix-strip=<level>::
+ Indicate how many initial directory names to strip off the hardwired absolute paths, passed to objdump. It has no effect without --objdump-prefix.
+
--skip-missing::
Skip symbols that cannot be annotated.
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index c33b69f..2b3cb21 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -286,6 +286,12 @@ OPTIONS
--objdump=<path>::
Path to objdump binary.
+--objdump-prefix=<path>::
+ Specify prefix to add to the absolute paths where objdump looks for source files.
+
+--objdump-prefix-strip=<level>::
+ Indicate how many initial directory names to strip off the hardwired absolute paths, passed to objdump. It has no effect without --objdump-prefix.
+
--group::
Show event group information together.
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 9e5b07eb..2f269e9 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -157,6 +157,16 @@ Default is to monitor all CPUS.
--asm-raw::
Show raw instruction encoding of assembly instructions.
+--objdump=<path>::
+ Path to objdump binary.
+
+--objdump-prefix=<path>::
+ Specify prefix to add to the absolute paths where objdump looks for source files.
+
+--objdump-prefix-strip=<level>::
+ Indicate how many initial directory names to strip off the hardwired absolute paths, passed to objdump. It has no effect without --objdump-prefix.
+
+
-g::
Enables call-graph (stack chain/backtrace) recording.
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index b57a027..9f0690d 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -324,6 +324,11 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
"Specify disassembler style (e.g. -M intel for intel syntax)"),
OPT_STRING(0, "objdump", &objdump_path, "path",
"objdump binary to use for disassembly and annotations"),
+ OPT_STRING(0, "objdump-prefix", &objdump_prefix_path, "path",
+ "prefix to the absolute paths where objdump looks for source files"),
+ OPT_STRING(0, "objdump-prefix-strip", &objdump_prefix_strip, "level",
+ "Indicate how many initial directory names to strip off the hardwired "
+ "absolute paths, passed to objdump."),
OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
"Show event group information together"),
OPT_END()
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 56025d9..3328fb8 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -715,6 +715,11 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
"add last branch records to call history"),
OPT_STRING(0, "objdump", &objdump_path, "path",
"objdump binary to use for disassembly and annotations"),
+ OPT_STRING(0, "objdump-prefix", &objdump_prefix_path, "path",
+ "prefix to the absolute paths where objdump looks for source files"),
+ OPT_STRING(0, "objdump-prefix-strip", &objdump_prefix_strip, "level",
+ "Indicate how many initial directory names to strip off the hardwired "
+ "absolute paths, passed to objdump."),
OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
"Disable symbol demangling"),
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 6b98742..24bdb08 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1150,6 +1150,11 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
"Enable kernel symbol demangling"),
OPT_STRING(0, "objdump", &objdump_path, "path",
"objdump binary to use for disassembly and annotations"),
+ OPT_STRING(0, "objdump-prefix", &objdump_prefix_path, "path",
+ "prefix to the absolute paths where objdump looks for source files"),
+ OPT_STRING(0, "objdump-prefix-strip", &objdump_prefix_strip, "level",
+ "Indicate how many initial directory names to strip off the hardwired "
+ "absolute paths, passed to objdump."),
OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
"Specify disassembler style (e.g. -M intel for intel syntax)"),
OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 7f5bdfc..c5373f4 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -23,6 +23,8 @@
const char *disassembler_style;
const char *objdump_path;
+const char *objdump_prefix_path;
+const char *objdump_prefix_strip;
static regex_t file_lineno;
static struct ins *ins__find(const char *name);
@@ -1039,12 +1041,16 @@ fallback:
}
snprintf(command, sizeof(command),
- "%s %s%s --start-address=0x%016" PRIx64
+ "%s %s%s %s%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64
" -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
objdump_path ? objdump_path : "objdump",
disassembler_style ? "-M " : "",
disassembler_style ? disassembler_style : "",
+ objdump_prefix_path ? "--prefix=" : "",
+ objdump_prefix_path ? objdump_prefix_path : "",
+ objdump_prefix_strip ? "--prefix-strip=" : "",
+ objdump_prefix_strip ? objdump_prefix_strip : "",
map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end),
symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index cadbdc9..fd9782e 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -168,5 +168,7 @@ static inline int symbol__tui_annotate(struct symbol *sym __maybe_unused,
#endif
extern const char *disassembler_style;
+extern const char *objdump_prefix_path;
+extern const char *objdump_prefix_strip;
#endif /* __PERF_ANNOTATE_H */