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Date: Mon, 14 May 2012 16:10:23 +0900
From: Namhyung Kim <namhyung.kim@....com>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...hat.com>,
Namhyung Kim <namhyung@...il.com>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/5] perf tools: Support minimal build
Now we have isolated all ELF-specific stuff, it's possible
to build without libelf. The output binary can do most of
jobs but lacks (user level) symbol information - kernel
symbols are still accessable thanks to the kallsyms.
For now, only 'perf probe' command is removed since it
depends on libelf/libdw heavily.
Signed-off-by: Namhyung Kim <namhyung.kim@....com>
---
tools/perf/Makefile | 28 ++++++++++++++++++++++++++++
tools/perf/command-list.txt | 2 +-
tools/perf/perf.c | 2 ++
tools/perf/util/generate-cmdlist.sh | 15 +++++++++++++++
tools/perf/util/symbol-minimal.c | 32 ++++++++++++++++++++++++++++++++
5 files changed, 78 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/util/symbol-minimal.c
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 7198c6cbc006..001aec806903 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -424,6 +424,32 @@ PYRF_OBJS += $(OUTPUT)util/xyarray.o
-include config.mak.autogen
-include config.mak
+ifdef MINIMAL
+NO_DWARF := 1
+NO_NEWT := 1
+NO_GTK2 := 1
+NO_LIBPERL := 1
+NO_LIBPYTHON := 1
+NO_DEMANGLE := 1
+NO_STRLCPY := 1
+
+BASIC_CFLAGS += -DMINIMAL_BUILD
+
+EXTLIBS := $(filter-out -lelf,$(EXTLIBS))
+
+# Remove ELF/DWARF dependent codes
+LIB_OBJS := $(filter-out $(OUTPUT)util/symbol-elf.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/dwarf-aux.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/probe-event.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/probe-finder.o,$(LIB_OBJS))
+
+BUILTIN_OBJS := $(filter-out $(OUTPUT)builtin-probe.o,$(BUILTIN_OBJS))
+
+# Use minimal symbol handling
+LIB_OBJS += $(OUTPUT)util/symbol-minimal.o
+
+endif # MINIMAL
+
ifndef NO_DWARF
FLAGS_DWARF=$(ALL_CFLAGS) -ldw -lelf $(ALL_LDFLAGS) $(EXTLIBS)
ifneq ($(call try-cc,$(SOURCE_DWARF),$(FLAGS_DWARF)),y)
@@ -438,6 +464,7 @@ ifneq ($(OUTPUT),)
BASIC_CFLAGS += -I$(OUTPUT)
endif
+ifndef MINIMAL
FLAGS_LIBELF=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS)
ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
FLAGS_GLIBC=$(ALL_CFLAGS) $(ALL_LDFLAGS)
@@ -447,6 +474,7 @@ ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel);
endif
endif
+endif # MINIMAL
ifneq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON)),y)
BASIC_CFLAGS += -DLIBELF_NO_MMAP
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index d695fe40fbff..0303ec692274 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -18,7 +18,7 @@ perf-stat mainporcelain common
perf-timechart mainporcelain common
perf-top mainporcelain common
perf-script mainporcelain common
-perf-probe mainporcelain common
+perf-probe mainporcelain full
perf-kmem mainporcelain common
perf-lock mainporcelain common
perf-kvm mainporcelain common
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2b2e225a4d4c..1640d96c1716 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -313,7 +313,9 @@ static void handle_internal_command(int argc, const char **argv)
{ "version", cmd_version, 0 },
{ "script", cmd_script, 0 },
{ "sched", cmd_sched, 0 },
+#ifndef MINIMAL_BUILD
{ "probe", cmd_probe, 0 },
+#endif
{ "kmem", cmd_kmem, 0 },
{ "lock", cmd_lock, 0 },
{ "kvm", cmd_kvm, 0 },
diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
index f06f6fd148f8..829badc0f56a 100755
--- a/tools/perf/util/generate-cmdlist.sh
+++ b/tools/perf/util/generate-cmdlist.sh
@@ -21,4 +21,19 @@ do
p
}' "Documentation/perf-$cmd.txt"
done
+
+echo "#ifndef MINIMAL_BUILD"
+sed -n -e 's/^perf-\([^ ]*\)[ ].* full.*/\1/p' command-list.txt |
+sort |
+while read cmd
+do
+ sed -n '
+ /^NAME/,/perf-'"$cmd"'/H
+ ${
+ x
+ s/.*perf-'"$cmd"' - \(.*\)/ {"'"$cmd"'", "\1"},/
+ p
+ }' "Documentation/perf-$cmd.txt"
+done
+echo "#endif /* MINIMAL_BUILD */"
echo "};"
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
new file mode 100644
index 000000000000..2917ede1d5ba
--- /dev/null
+++ b/tools/perf/util/symbol-minimal.c
@@ -0,0 +1,32 @@
+#include "symbol.h"
+
+
+int filename__read_build_id(const char *filename __used, void *bf __used,
+ size_t size __used)
+{
+ return -1;
+}
+
+int sysfs__read_build_id(const char *filename __used, void *build_id __used,
+ size_t size __used)
+{
+ return -1;
+}
+
+int dso__synthesize_plt_symbols(struct dso *dso __used, struct map *map __used,
+ symbol_filter_t filter __used)
+{
+ return 0;
+}
+
+int dso__load_sym(struct dso *dso __used, struct map *map __used,
+ const char *name __used, int fd __used,
+ symbol_filter_t filter __used, int kmodule __used,
+ int want_symtab __used)
+{
+ return 0;
+}
+
+void symbol__elf_init(void)
+{
+}
--
1.7.10.1
--
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