From 11c6cbe706f218a8dc7e1f962f12b3a52ddd33a9 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 21 Nov 2018 17:42:00 -0300 Subject: tools build feature: Check if eventfd() is available A new 'perf bench epoll' will use this, and to disable it for older systems, add a feature test for this API. This is just a simple program that if successfully compiled, means that the feature is present, at least at the library level, in a build that sets the output directory to /tmp/build/perf (using O=/tmp/build/perf), we end up with: $ ls -la /tmp/build/perf/feature/test-eventfd* -rwxrwxr-x. 1 acme acme 8176 Nov 21 15:58 /tmp/build/perf/feature/test-eventfd.bin -rw-rw-r--. 1 acme acme 588 Nov 21 15:58 /tmp/build/perf/feature/test-eventfd.d -rw-rw-r--. 1 acme acme 0 Nov 21 15:58 /tmp/build/perf/feature/test-eventfd.make.output $ ldd /tmp/build/perf/feature/test-eventfd.bin linux-vdso.so.1 (0x00007fff3bf3f000) libc.so.6 => /lib64/libc.so.6 (0x00007fa984061000) /lib64/ld-linux-x86-64.so.2 (0x00007fa984417000) $ grep eventfd -A 2 -B 2 /tmp/build/perf/FEATURE-DUMP feature-dwarf=1 feature-dwarf_getlocations=1 feature-eventfd=1 feature-fortify-source=1 feature-sync-compare-and-swap=1 $ The main thing here is that in the end we'll have -DHAVE_EVENTFD in CFLAGS, and then the 'perf bench' entry needing that API can be selectively pruned. Cc: Adrian Hunter Cc: Andrew Morton Cc: David Ahern Cc: Davidlohr Bueso Cc: Jason Baron Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-wkeldwob7dpx6jvtuzl8164k@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.config | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'tools/perf/Makefile.config') diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index a0e8c23f9125..376d1f78be04 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -299,11 +299,14 @@ ifndef NO_BIONIC endif endif +ifeq ($(feature-eventfd), 1) + CFLAGS += -DHAVE_EVENTFD +endif + ifeq ($(feature-get_current_dir_name), 1) CFLAGS += -DHAVE_GET_CURRENT_DIR_NAME endif - ifdef NO_LIBELF NO_DWARF := 1 NO_DEMANGLE := 1 -- cgit v1.2.3-59-g8ed1b From dd1d0044dd1c1bf84a9b3e1f24e43347b26b96a0 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 21 Nov 2018 16:43:41 +0100 Subject: perf jvmti: Separate jvmti cmlr check The Compiled Method Load Record (cmlr) is JDK specific interface to access JVM stack info. This makes the jvmti agent code not compile under another jdk, which does not support that. Separating jvmti cmlr check into special feature check, and adding HAVE_JVMTI_CMLR macro to indicate that. Mark cmlr code in jvmti/libjvmti.c with HAVE_JVMTI_CMLR, so we can compile it on system without cmlr support. This change makes the jvmti compile with java-1.8.0-ibm package. It's without the line numbers support, but the rest works. Adding NO_JVMTI_CMLR compile variable for testing. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ben Gainey Cc: Gustavo Luiz Duarte Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20181121154341.21521-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/build/feature/Makefile | 4 ++++ tools/build/feature/test-jvmti-cmlr.c | 11 +++++++++++ tools/build/feature/test-jvmti.c | 1 - tools/perf/Makefile.config | 7 +++++++ tools/perf/Makefile.perf | 3 +++ tools/perf/jvmti/libjvmti.c | 12 ++++++++++++ 6 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 tools/build/feature/test-jvmti-cmlr.c (limited to 'tools/perf/Makefile.config') diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index 325087a0429c..38c22e122cb0 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -55,6 +55,7 @@ FILES= \ test-sdt.bin \ test-cxx.bin \ test-jvmti.bin \ + test-jvmti-cmlr.bin \ test-sched_getcpu.bin \ test-setns.bin \ test-libopencsd.bin \ @@ -267,6 +268,9 @@ $(OUTPUT)test-cxx.bin: $(OUTPUT)test-jvmti.bin: $(BUILD) +$(OUTPUT)test-jvmti-cmlr.bin: + $(BUILD) + $(OUTPUT)test-llvm.bin: $(BUILDXX) -std=gnu++11 \ -I$(shell $(LLVM_CONFIG) --includedir) \ diff --git a/tools/build/feature/test-jvmti-cmlr.c b/tools/build/feature/test-jvmti-cmlr.c new file mode 100644 index 000000000000..c27b5b71a0f6 --- /dev/null +++ b/tools/build/feature/test-jvmti-cmlr.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +int main(void) +{ + jvmtiCompiledMethodLoadInlineRecord rec __attribute__((unused)); + jvmtiCompiledMethodLoadRecordHeader hdr __attribute__((unused)); + PCStackInfo p __attribute__((unused)); + return 0; +} diff --git a/tools/build/feature/test-jvmti.c b/tools/build/feature/test-jvmti.c index 5cf31192f204..799916d2e3e3 100644 --- a/tools/build/feature/test-jvmti.c +++ b/tools/build/feature/test-jvmti.c @@ -1,6 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 #include -#include int main(void) { diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 376d1f78be04..e110010e7faa 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -855,6 +855,13 @@ ifndef NO_JVMTI $(call feature_check,jvmti) ifeq ($(feature-jvmti), 1) $(call detected_var,JDIR) + ifndef NO_JVMTI_CMLR + FEATURE_CHECK_CFLAGS-jvmti-cmlr := $(FEATURE_CHECK_CFLAGS-jvmti) + $(call feature_check,jvmti-cmlr) + ifeq ($(feature-jvmti-cmlr), 1) + CFLAGS += -DHAVE_JVMTI_CMLR + endif + endif # NO_JVMTI_CMLR else $(warning No openjdk development package found, please install JDK package, e.g. openjdk-8-jdk, java-1.8.0-openjdk-devel) NO_JVMTI := 1 diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index d95655489f7e..239e7b3270f4 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -95,6 +95,9 @@ include ../scripts/utilities.mak # # Define NO_JVMTI if you do not want jvmti agent built # +# Define NO_JVMTI_CMLR (debug only) if you do not want to process CMLR +# data for java source lines. +# # Define LIBCLANGLLVM if you DO want builtin clang and llvm support. # When selected, pass LLVM_CONFIG=/path/to/llvm-config to `make' if # llvm-config is not in $PATH. diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c index 6add3e982614..aea7b1fe85aa 100644 --- a/tools/perf/jvmti/libjvmti.c +++ b/tools/perf/jvmti/libjvmti.c @@ -6,7 +6,9 @@ #include #include #include +#ifdef HAVE_JVMTI_CMLR #include +#endif #include #include "jvmti_agent.h" @@ -27,6 +29,7 @@ static void print_error(jvmtiEnv *jvmti, const char *msg, jvmtiError ret) } } +#ifdef HAVE_JVMTI_CMLR static jvmtiError do_get_line_numbers(jvmtiEnv *jvmti, void *pc, jmethodID m, jint bci, jvmti_line_info_t *tab, jint *nr) @@ -125,6 +128,15 @@ get_line_numbers(jvmtiEnv *jvmti, const void *compile_info, jvmti_line_info_t ** *nr_lines = lines_total; return JVMTI_ERROR_NONE; } +#else /* HAVE_JVMTI_CMLR */ + +static jvmtiError +get_line_numbers(jvmtiEnv *jvmti __maybe_unused, const void *compile_info __maybe_unused, + jvmti_line_info_t **tab __maybe_unused, int *nr_lines __maybe_unused) +{ + return JVMTI_ERROR_NONE; +} +#endif /* HAVE_JVMTI_CMLR */ static void copy_class_filename(const char * class_sign, const char * file_name, char * result, size_t max_length) -- cgit v1.2.3-59-g8ed1b