* [PATCH 1/5] perf tools: Use shell function for perl cflags retrieval
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
@ 2017-12-18 14:39 ` Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 2/5] perf tools: Fix up build in hardened environments Arnaldo Carvalho de Melo
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-12-18 14:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, linux-perf-users, Jiri Olsa, David Ahern,
Namhyung Kim, Peter Zijlstra, Arnaldo Carvalho de Melo
From: Jiri Olsa <jolsa@kernel.org>
Using the shell function for perl CFLAGS retrieval instead of back
quotes (``). Both execute shell with the command, but the latter is more
explicit and seems to be the preferred way.
Also we don't have any other use of the back quotes in perf Makefiles.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171108102739.30338-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Makefile.config | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ed65e82f034e..710623ddb8af 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -583,7 +583,7 @@ else
PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
- PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
+ PERL_EMBED_CCOPTS = $(shell perl -MExtUtils::Embed -e ccopts 2>/dev/null)
FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
ifneq ($(feature-libperl), 1)
--
2.13.6
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 2/5] perf tools: Fix up build in hardened environments
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 1/5] perf tools: Use shell function for perl cflags retrieval Arnaldo Carvalho de Melo
@ 2017-12-18 14:39 ` Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 3/5] perf jvmti: Generate correct debug information for inlined code Arnaldo Carvalho de Melo
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-12-18 14:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, linux-perf-users, Jiri Olsa, David Ahern,
Namhyung Kim, Peter Zijlstra, Arnaldo Carvalho de Melo
From: Jiri Olsa <jolsa@kernel.org>
On Fedora systems the perl and python CFLAGS/LDFLAGS include the
hardened specs from redhat-rpm-config package. We apply them only for
perl/python objects, which makes them not compatible with the rest of
the objects and the build fails with:
/usr/bin/ld: perf-in.o: relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -f
+PIC
/usr/bin/ld: libperf.a(libperf-in.o): relocation R_X86_64_32S against `.text' can not be used when making a shared object; recompile w
+ith -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile.perf:507: perf] Error 1
make[1]: *** [Makefile.perf:210: sub-make] Error 2
make: *** [Makefile:69: all] Error 2
Mainly it's caused by perl/python objects being compiled with:
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
which prevent the final link impossible, because it will check
for 'proper' objects with following option:
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20171204082437.GC30564@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Makefile.config | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 710623ddb8af..0294bfb6c5f8 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -188,9 +188,7 @@ ifdef PYTHON_CONFIG
PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS)) -lutil
PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
- ifeq ($(CC_NO_CLANG), 1)
- PYTHON_EMBED_CCOPTS := $(filter-out -specs=%,$(PYTHON_EMBED_CCOPTS))
- endif
+ PYTHON_EMBED_CCOPTS := $(filter-out -specs=%,$(PYTHON_EMBED_CCOPTS))
FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
endif
@@ -576,7 +574,6 @@ ifndef NO_GTK2
endif
endif
-
ifdef NO_LIBPERL
CFLAGS += -DNO_LIBPERL
else
@@ -584,6 +581,8 @@ else
PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
PERL_EMBED_CCOPTS = $(shell perl -MExtUtils::Embed -e ccopts 2>/dev/null)
+ PERL_EMBED_CCOPTS := $(filter-out -specs=%,$(PERL_EMBED_CCOPTS))
+ PERL_EMBED_LDOPTS := $(filter-out -specs=%,$(PERL_EMBED_LDOPTS))
FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
ifneq ($(feature-libperl), 1)
--
2.13.6
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 3/5] perf jvmti: Generate correct debug information for inlined code
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 1/5] perf tools: Use shell function for perl cflags retrieval Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 2/5] perf tools: Fix up build in hardened environments Arnaldo Carvalho de Melo
@ 2017-12-18 14:39 ` Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 4/5] tools arch s390: Do not include header files from the kernel sources Arnaldo Carvalho de Melo
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-12-18 14:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, linux-perf-users, Ben Gainey, Alexander Shishkin,
Colin King, Darren Hart, Jiri Olsa, Namhyung Kim, Peter Zijlstra,
Thomas Gleixner, Kim Phillips, Arnaldo Carvalho de Melo
From: Ben Gainey <ben.gainey@arm.com>
tools/perf/jvmti is broken in so far as it generates incorrect debug
information. Specifically it attributes all debug lines to the original
method being output even in the case that some code is being inlined
from elsewhere. This patch fixes the issue.
To test (from within linux/tools/perf):
export JDIR=/usr/lib/jvm/java-8-openjdk-amd64/
make
cat << __EOF > Test.java
public class Test
{
private StringBuilder b = new StringBuilder();
private void loop(int i, String... args)
{
for (String a : args)
b.append(a);
long hc = b.hashCode() * System.nanoTime();
b = new StringBuilder();
b.append(hc);
System.out.printf("Iteration %d = %d\n", i, hc);
}
public void run(String... args)
{
for (int i = 0; i < 10000; ++i)
{
loop(i, args);
}
}
public static void main(String... args)
{
Test t = new Test();
t.run(args);
}
}
__EOF
$JDIR/bin/javac Test.java
./perf record -F 10000 -g -k mono $JDIR/bin/java -agentpath:`pwd`/libperf-jvmti.so Test
./perf inject --jit -i perf.data -o perf.data.jitted
./perf annotate -i perf.data.jitted --stdio | grep Test\.java: | sort -u
Before this patch, Test.java line numbers get reported that are greater
than the number of lines in the Test.java file. They come from the
source file of the inlined function, e.g. java/lang/String.java:1085.
For further validation one can examine those lines in the JDK source
distribution and confirm that they map to inlined functions called by
Test.java.
After this patch, the filename of the inlined function is output
rather than the incorrect original source filename.
Signed-off-by: Ben Gainey <ben.gainey@arm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ben Gainey <ben.gainey@arm.com>
Cc: Colin King <colin.king@canonical.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 598b7c6919c7 ("perf jit: add source line info support")
Link: http://lkml.kernel.org/r/20171122182541.d25599a3eb1ada3480d142fa@arm.com
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/jvmti/jvmti_agent.c | 16 +++--
tools/perf/jvmti/jvmti_agent.h | 7 +-
tools/perf/jvmti/libjvmti.c | 147 ++++++++++++++++++++++++++++++++++-------
3 files changed, 134 insertions(+), 36 deletions(-)
diff --git a/tools/perf/jvmti/jvmti_agent.c b/tools/perf/jvmti/jvmti_agent.c
index cf36de7ea255..0c6d1002b524 100644
--- a/tools/perf/jvmti/jvmti_agent.c
+++ b/tools/perf/jvmti/jvmti_agent.c
@@ -384,13 +384,13 @@ jvmti_write_code(void *agent, char const *sym,
}
int
-jvmti_write_debug_info(void *agent, uint64_t code, const char *file,
- jvmti_line_info_t *li, int nr_lines)
+jvmti_write_debug_info(void *agent, uint64_t code,
+ int nr_lines, jvmti_line_info_t *li,
+ const char * const * file_names)
{
struct jr_code_debug_info rec;
- size_t sret, len, size, flen;
+ size_t sret, len, size, flen = 0;
uint64_t addr;
- const char *fn = file;
FILE *fp = agent;
int i;
@@ -405,7 +405,9 @@ jvmti_write_debug_info(void *agent, uint64_t code, const char *file,
return -1;
}
- flen = strlen(file) + 1;
+ for (i = 0; i < nr_lines; ++i) {
+ flen += strlen(file_names[i]) + 1;
+ }
rec.p.id = JIT_CODE_DEBUG_INFO;
size = sizeof(rec);
@@ -421,7 +423,7 @@ jvmti_write_debug_info(void *agent, uint64_t code, const char *file,
* file[] : source file name
*/
size += nr_lines * sizeof(struct debug_entry);
- size += flen * nr_lines;
+ size += flen;
rec.p.total_size = size;
/*
@@ -452,7 +454,7 @@ jvmti_write_debug_info(void *agent, uint64_t code, const char *file,
if (sret != 1)
goto error;
- sret = fwrite_unlocked(fn, flen, 1, fp);
+ sret = fwrite_unlocked(file_names[i], strlen(file_names[i]) + 1, 1, fp);
if (sret != 1)
goto error;
}
diff --git a/tools/perf/jvmti/jvmti_agent.h b/tools/perf/jvmti/jvmti_agent.h
index fe32d8344a82..6ed82f6c06dd 100644
--- a/tools/perf/jvmti/jvmti_agent.h
+++ b/tools/perf/jvmti/jvmti_agent.h
@@ -14,6 +14,7 @@ typedef struct {
unsigned long pc;
int line_number;
int discrim; /* discriminator -- 0 for now */
+ jmethodID methodID;
} jvmti_line_info_t;
void *jvmti_open(void);
@@ -22,11 +23,9 @@ int jvmti_write_code(void *agent, char const *symbol_name,
uint64_t vma, void const *code,
const unsigned int code_size);
-int jvmti_write_debug_info(void *agent,
- uint64_t code,
- const char *file,
+int jvmti_write_debug_info(void *agent, uint64_t code, int nr_lines,
jvmti_line_info_t *li,
- int nr_lines);
+ const char * const * file_names);
#if defined(__cplusplus)
}
diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c
index c62c9fc9a525..6add3e982614 100644
--- a/tools/perf/jvmti/libjvmti.c
+++ b/tools/perf/jvmti/libjvmti.c
@@ -47,6 +47,7 @@ do_get_line_numbers(jvmtiEnv *jvmti, void *pc, jmethodID m, jint bci,
tab[lines].pc = (unsigned long)pc;
tab[lines].line_number = loc_tab[i].line_number;
tab[lines].discrim = 0; /* not yet used */
+ tab[lines].methodID = m;
lines++;
} else {
break;
@@ -125,6 +126,99 @@ get_line_numbers(jvmtiEnv *jvmti, const void *compile_info, jvmti_line_info_t **
return JVMTI_ERROR_NONE;
}
+static void
+copy_class_filename(const char * class_sign, const char * file_name, char * result, size_t max_length)
+{
+ /*
+ * Assume path name is class hierarchy, this is a common practice with Java programs
+ */
+ if (*class_sign == 'L') {
+ int j, i = 0;
+ char *p = strrchr(class_sign, '/');
+ if (p) {
+ /* drop the 'L' prefix and copy up to the final '/' */
+ for (i = 0; i < (p - class_sign); i++)
+ result[i] = class_sign[i+1];
+ }
+ /*
+ * append file name, we use loops and not string ops to avoid modifying
+ * class_sign which is used later for the symbol name
+ */
+ for (j = 0; i < (max_length - 1) && file_name && j < strlen(file_name); j++, i++)
+ result[i] = file_name[j];
+
+ result[i] = '\0';
+ } else {
+ /* fallback case */
+ size_t file_name_len = strlen(file_name);
+ strncpy(result, file_name, file_name_len < max_length ? file_name_len : max_length);
+ }
+}
+
+static jvmtiError
+get_source_filename(jvmtiEnv *jvmti, jmethodID methodID, char ** buffer)
+{
+ jvmtiError ret;
+ jclass decl_class;
+ char *file_name = NULL;
+ char *class_sign = NULL;
+ char fn[PATH_MAX];
+ size_t len;
+
+ ret = (*jvmti)->GetMethodDeclaringClass(jvmti, methodID, &decl_class);
+ if (ret != JVMTI_ERROR_NONE) {
+ print_error(jvmti, "GetMethodDeclaringClass", ret);
+ return ret;
+ }
+
+ ret = (*jvmti)->GetSourceFileName(jvmti, decl_class, &file_name);
+ if (ret != JVMTI_ERROR_NONE) {
+ print_error(jvmti, "GetSourceFileName", ret);
+ return ret;
+ }
+
+ ret = (*jvmti)->GetClassSignature(jvmti, decl_class, &class_sign, NULL);
+ if (ret != JVMTI_ERROR_NONE) {
+ print_error(jvmti, "GetClassSignature", ret);
+ goto free_file_name_error;
+ }
+
+ copy_class_filename(class_sign, file_name, fn, PATH_MAX);
+ len = strlen(fn);
+ *buffer = malloc((len + 1) * sizeof(char));
+ if (!*buffer) {
+ print_error(jvmti, "GetClassSignature", ret);
+ ret = JVMTI_ERROR_OUT_OF_MEMORY;
+ goto free_class_sign_error;
+ }
+ strcpy(*buffer, fn);
+ ret = JVMTI_ERROR_NONE;
+
+free_class_sign_error:
+ (*jvmti)->Deallocate(jvmti, (unsigned char *)class_sign);
+free_file_name_error:
+ (*jvmti)->Deallocate(jvmti, (unsigned char *)file_name);
+
+ return ret;
+}
+
+static jvmtiError
+fill_source_filenames(jvmtiEnv *jvmti, int nr_lines,
+ const jvmti_line_info_t * line_tab,
+ char ** file_names)
+{
+ int index;
+ jvmtiError ret;
+
+ for (index = 0; index < nr_lines; ++index) {
+ ret = get_source_filename(jvmti, line_tab[index].methodID, &(file_names[index]));
+ if (ret != JVMTI_ERROR_NONE)
+ return ret;
+ }
+
+ return JVMTI_ERROR_NONE;
+}
+
static void JNICALL
compiled_method_load_cb(jvmtiEnv *jvmti,
jmethodID method,
@@ -135,16 +229,18 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
const void *compile_info)
{
jvmti_line_info_t *line_tab = NULL;
+ char ** line_file_names = NULL;
jclass decl_class;
char *class_sign = NULL;
char *func_name = NULL;
char *func_sign = NULL;
- char *file_name= NULL;
+ char *file_name = NULL;
char fn[PATH_MAX];
uint64_t addr = (uint64_t)(uintptr_t)code_addr;
jvmtiError ret;
int nr_lines = 0; /* in line_tab[] */
size_t len;
+ int output_debug_info = 0;
ret = (*jvmti)->GetMethodDeclaringClass(jvmti, method,
&decl_class);
@@ -158,6 +254,19 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
if (ret != JVMTI_ERROR_NONE) {
warnx("jvmti: cannot get line table for method");
nr_lines = 0;
+ } else if (nr_lines > 0) {
+ line_file_names = malloc(sizeof(char*) * nr_lines);
+ if (!line_file_names) {
+ warnx("jvmti: cannot allocate space for line table method names");
+ } else {
+ memset(line_file_names, 0, sizeof(char*) * nr_lines);
+ ret = fill_source_filenames(jvmti, nr_lines, line_tab, line_file_names);
+ if (ret != JVMTI_ERROR_NONE) {
+ warnx("jvmti: fill_source_filenames failed");
+ } else {
+ output_debug_info = 1;
+ }
+ }
}
}
@@ -181,33 +290,14 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
goto error;
}
- /*
- * Assume path name is class hierarchy, this is a common practice with Java programs
- */
- if (*class_sign == 'L') {
- int j, i = 0;
- char *p = strrchr(class_sign, '/');
- if (p) {
- /* drop the 'L' prefix and copy up to the final '/' */
- for (i = 0; i < (p - class_sign); i++)
- fn[i] = class_sign[i+1];
- }
- /*
- * append file name, we use loops and not string ops to avoid modifying
- * class_sign which is used later for the symbol name
- */
- for (j = 0; i < (PATH_MAX - 1) && file_name && j < strlen(file_name); j++, i++)
- fn[i] = file_name[j];
- fn[i] = '\0';
- } else {
- /* fallback case */
- strcpy(fn, file_name);
- }
+ copy_class_filename(class_sign, file_name, fn, PATH_MAX);
+
/*
* write source line info record if we have it
*/
- if (jvmti_write_debug_info(jvmti_agent, addr, fn, line_tab, nr_lines))
- warnx("jvmti: write_debug_info() failed");
+ if (output_debug_info)
+ if (jvmti_write_debug_info(jvmti_agent, addr, nr_lines, line_tab, (const char * const *) line_file_names))
+ warnx("jvmti: write_debug_info() failed");
len = strlen(func_name) + strlen(class_sign) + strlen(func_sign) + 2;
{
@@ -223,6 +313,13 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
(*jvmti)->Deallocate(jvmti, (unsigned char *)class_sign);
(*jvmti)->Deallocate(jvmti, (unsigned char *)file_name);
free(line_tab);
+ while (line_file_names && (nr_lines > 0)) {
+ if (line_file_names[nr_lines - 1]) {
+ free(line_file_names[nr_lines - 1]);
+ }
+ nr_lines -= 1;
+ }
+ free(line_file_names);
}
static void JNICALL
--
2.13.6
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 4/5] tools arch s390: Do not include header files from the kernel sources
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
` (2 preceding siblings ...)
2017-12-18 14:39 ` [PATCH 3/5] perf jvmti: Generate correct debug information for inlined code Arnaldo Carvalho de Melo
@ 2017-12-18 14:39 ` Arnaldo Carvalho de Melo
2017-12-18 14:39 ` [PATCH 5/5] x86/asm: Allow again using asm.h when building for the 'bpf' clang target Arnaldo Carvalho de Melo
2017-12-18 17:11 ` [GIT PULL 0/5] perf/urgent fixes Ingo Molnar
5 siblings, 0 replies; 7+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-12-18 14:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, linux-perf-users, Arnaldo Carvalho de Melo,
Hendrik Brueckner, Thomas Richter, Martin Schwidefsky,
Adrian Hunter, David Ahern, Jiri Olsa, Namhyung Kim, Wang Nan
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Long ago we decided to be verbotten including files in the kernel git
sources from tools/ living source code, to avoid disturbing kernel
development (and perf's and other tools/) when, say, a kernel hacker
adds something, tests everything but tools/ and have tools/ build
broken.
This got broken recently by s/390, fix it by copying
arch/s390/include/uapi/asm/perf_regs.h to tools/arch/s390/include/uapi/asm/,
making this one be used by means of <asm/perf_regs.h> and updating
tools/perf/check_headers.sh to make sure we are notified when the
original changes, so that we can check if anything is needed on the
tooling side.
This would have been caught by the 'tarkpg' test entry in:
$ make -C tools/perf build-test
When run on a s/390 build system or container.
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: f704ef44602f ("s390/perf: add support for perf_regs and libdw")
Link: https://lkml.kernel.org/n/tip-9ftf7h6n7t9n7515aceg44yf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/arch/s390/include/uapi/asm/perf_regs.h | 43 ++++++++++++++++++++++++++++
tools/perf/arch/s390/include/perf_regs.h | 2 +-
| 1 +
3 files changed, 45 insertions(+), 1 deletion(-)
create mode 100644 tools/arch/s390/include/uapi/asm/perf_regs.h
diff --git a/tools/arch/s390/include/uapi/asm/perf_regs.h b/tools/arch/s390/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..7c8564f98205
--- /dev/null
+++ b/tools/arch/s390/include/uapi/asm/perf_regs.h
@@ -0,0 +1,43 @@
+#ifndef _ASM_S390_PERF_REGS_H
+#define _ASM_S390_PERF_REGS_H
+
+enum perf_event_s390_regs {
+ PERF_REG_S390_R0,
+ PERF_REG_S390_R1,
+ PERF_REG_S390_R2,
+ PERF_REG_S390_R3,
+ PERF_REG_S390_R4,
+ PERF_REG_S390_R5,
+ PERF_REG_S390_R6,
+ PERF_REG_S390_R7,
+ PERF_REG_S390_R8,
+ PERF_REG_S390_R9,
+ PERF_REG_S390_R10,
+ PERF_REG_S390_R11,
+ PERF_REG_S390_R12,
+ PERF_REG_S390_R13,
+ PERF_REG_S390_R14,
+ PERF_REG_S390_R15,
+ PERF_REG_S390_FP0,
+ PERF_REG_S390_FP1,
+ PERF_REG_S390_FP2,
+ PERF_REG_S390_FP3,
+ PERF_REG_S390_FP4,
+ PERF_REG_S390_FP5,
+ PERF_REG_S390_FP6,
+ PERF_REG_S390_FP7,
+ PERF_REG_S390_FP8,
+ PERF_REG_S390_FP9,
+ PERF_REG_S390_FP10,
+ PERF_REG_S390_FP11,
+ PERF_REG_S390_FP12,
+ PERF_REG_S390_FP13,
+ PERF_REG_S390_FP14,
+ PERF_REG_S390_FP15,
+ PERF_REG_S390_MASK,
+ PERF_REG_S390_PC,
+
+ PERF_REG_S390_MAX
+};
+
+#endif /* _ASM_S390_PERF_REGS_H */
diff --git a/tools/perf/arch/s390/include/perf_regs.h b/tools/perf/arch/s390/include/perf_regs.h
index d2df54a6bc5a..bcfbaed78cc2 100644
--- a/tools/perf/arch/s390/include/perf_regs.h
+++ b/tools/perf/arch/s390/include/perf_regs.h
@@ -3,7 +3,7 @@
#include <stdlib.h>
#include <linux/types.h>
-#include <../../../../arch/s390/include/uapi/asm/perf_regs.h>
+#include <asm/perf_regs.h>
void perf_regs_load(u64 *regs);
--git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
index 77406d25e521..e5170038e446 100755
--- a/tools/perf/check-headers.sh
+++ b/tools/perf/check-headers.sh
@@ -21,6 +21,7 @@ arch/x86/include/asm/cpufeatures.h
arch/arm/include/uapi/asm/perf_regs.h
arch/arm64/include/uapi/asm/perf_regs.h
arch/powerpc/include/uapi/asm/perf_regs.h
+arch/s390/include/uapi/asm/perf_regs.h
arch/x86/include/uapi/asm/perf_regs.h
arch/x86/include/uapi/asm/kvm.h
arch/x86/include/uapi/asm/kvm_perf.h
--
2.13.6
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 5/5] x86/asm: Allow again using asm.h when building for the 'bpf' clang target
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
` (3 preceding siblings ...)
2017-12-18 14:39 ` [PATCH 4/5] tools arch s390: Do not include header files from the kernel sources Arnaldo Carvalho de Melo
@ 2017-12-18 14:39 ` Arnaldo Carvalho de Melo
2017-12-18 17:11 ` [GIT PULL 0/5] perf/urgent fixes Ingo Molnar
5 siblings, 0 replies; 7+ messages in thread
From: Arnaldo Carvalho de Melo @ 2017-12-18 14:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, linux-perf-users, Arnaldo Carvalho de Melo,
Adrian Hunter, Alexander Potapenko, Alexei Starovoitov,
Andrey Ryabinin, Andy Lutomirski, Arnd Bergmann, Daniel Borkmann,
David Ahern, Dmitriy Vyukov, Jiri Olsa, Josh Poimboeuf,
Linus Torvalds, Matthias Kaehlcke, Miguel Bernal Marin,
Namhyung Kim, Peter Zijlstra, Thom
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Up to f5caf621ee35 ("x86/asm: Fix inline asm call constraints for Clang")
we were able to use x86 headers to build to the 'bpf' clang target, as
done by the BPF code in tools/perf/.
With that commit, we ended up with following failure for 'perf test LLVM', this
is because "clang ... -target bpf ..." fails since 4.0 does not have bpf inline
asm support and 6.0 does not recognize the register 'esp', fix it by guarding
that part with an #ifndef __BPF__, that is defined by clang when building to
the "bpf" target.
# perf test -v LLVM
37: LLVM search and compile :
37.1: Basic BPF llvm compile :
--- start ---
test child forked, pid 25526
Kernel build dir is set to /lib/modules/4.14.0+/build
set env: KBUILD_DIR=/lib/modules/4.14.0+/build
unset env: KBUILD_OPTS
include option is set to -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h
set env: NR_CPUS=4
set env: LINUX_VERSION_CODE=0x40e00
set env: CLANG_EXEC=/usr/local/bin/clang
set env: CLANG_OPTIONS=-xc
set env: KERNEL_INC_OPTIONS= -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h
set env: WORKING_DIR=/lib/modules/4.14.0+/build
set env: CLANG_SOURCE=-
llvm compiling command template: echo '/*
* bpf-script-example.c
* Test basic LLVM building
*/
#ifndef LINUX_VERSION_CODE
# error Need LINUX_VERSION_CODE
# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
#endif
#define BPF_ANY 0
#define BPF_MAP_TYPE_ARRAY 2
#define BPF_FUNC_map_lookup_elem 1
#define BPF_FUNC_map_update_elem 2
static void *(*bpf_map_lookup_elem)(void *map, void *key) =
(void *) BPF_FUNC_map_lookup_elem;
static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) =
(void *) BPF_FUNC_map_update_elem;
struct bpf_map_def {
unsigned int type;
unsigned int key_size;
unsigned int value_size;
unsigned int max_entries;
};
#define SEC(NAME) __attribute__((section(NAME), used))
struct bpf_map_def SEC("maps") flip_table = {
.type = BPF_MAP_TYPE_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(int),
.max_entries = 1,
};
SEC("func=SyS_epoll_wait")
int bpf_func__SyS_epoll_wait(void *ctx)
{
int ind =0;
int *flag = bpf_map_lookup_elem(&flip_table, &ind);
int new_flag;
if (!flag)
return 0;
/* flip flag and store back */
new_flag = !*flag;
bpf_map_update_elem(&flip_table, &ind, &new_flag, BPF_ANY);
return new_flag;
}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
' | $CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS -DLINUX_VERSION_CODE=$LINUX_VERSION_CODE $CLANG_OPTIONS $KERNEL_INC_OPTIONS -Wno-unused-value -Wno-pointer-sign -working-directory $WORKING_DIR -c "$CLANG_SOURCE" -target bpf -O2 -o -
test child finished with 0
---- end ----
LLVM search and compile subtest 0: Ok
37.2: kbuild searching :
--- start ---
test child forked, pid 25950
Kernel build dir is set to /lib/modules/4.14.0+/build
set env: KBUILD_DIR=/lib/modules/4.14.0+/build
unset env: KBUILD_OPTS
include option is set to -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h
set env: NR_CPUS=4
set env: LINUX_VERSION_CODE=0x40e00
set env: CLANG_EXEC=/usr/local/bin/clang
set env: CLANG_OPTIONS=-xc
set env: KERNEL_INC_OPTIONS= -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h
set env: WORKING_DIR=/lib/modules/4.14.0+/build
set env: CLANG_SOURCE=-
llvm compiling command template: echo '/*
* bpf-script-test-kbuild.c
* Test include from kernel header
*/
#ifndef LINUX_VERSION_CODE
# error Need LINUX_VERSION_CODE
# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
#endif
#define SEC(NAME) __attribute__((section(NAME), used))
#include <uapi/linux/fs.h>
#include <uapi/asm/ptrace.h>
SEC("func=vfs_llseek")
int bpf_func__vfs_llseek(void *ctx)
{
return 0;
}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
' | $CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS -DLINUX_VERSION_CODE=$LINUX_VERSION_CODE $CLANG_OPTIONS $KERNEL_INC_OPTIONS -Wno-unused-value -Wno-pointer-sign -working-directory $WORKING_DIR -c "$CLANG_SOURCE" -target bpf -O2 -o -
In file included from <stdin>:12:
In file included from /home/acme/git/linux/arch/x86/include/uapi/asm/ptrace.h:5:
In file included from /home/acme/git/linux/include/linux/compiler.h:242:
In file included from /home/acme/git/linux/arch/x86/include/asm/barrier.h:5:
In file included from /home/acme/git/linux/arch/x86/include/asm/alternative.h:10:
/home/acme/git/linux/arch/x86/include/asm/asm.h:145:50: error: unknown register name 'esp' in asm
register unsigned long current_stack_pointer asm(_ASM_SP);
^
/home/acme/git/linux/arch/x86/include/asm/asm.h:44:18: note: expanded from macro '_ASM_SP'
#define _ASM_SP __ASM_REG(sp)
^
/home/acme/git/linux/arch/x86/include/asm/asm.h:27:32: note: expanded from macro '__ASM_REG'
#define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg)
^
/home/acme/git/linux/arch/x86/include/asm/asm.h:18:29: note: expanded from macro '__ASM_SEL_RAW'
# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a)
^
/home/acme/git/linux/arch/x86/include/asm/asm.h:11:32: note: expanded from macro '__ASM_FORM_RAW'
# define __ASM_FORM_RAW(x) #x
^
<scratch space>:4:1: note: expanded from here
"esp"
^
1 error generated.
ERROR: unable to compile -
Hint: Check error message shown above.
Hint: You can also pre-compile it into .o using:
clang -target bpf -O2 -c -
with proper -I and -D options.
Failed to compile test case: 'kbuild searching'
test child finished with -1
---- end ----
LLVM search and compile subtest 1: FAILED!
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lkml.kernel.org/r/20171128175948.GL3298@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
arch/x86/include/asm/asm.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 219faaec51df..386a6900e206 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -136,6 +136,7 @@
#endif
#ifndef __ASSEMBLY__
+#ifndef __BPF__
/*
* This output constraint should be used for any inline asm which has a "call"
* instruction. Otherwise the asm may be inserted before the frame pointer
@@ -145,5 +146,6 @@
register unsigned long current_stack_pointer asm(_ASM_SP);
#define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
#endif
+#endif
#endif /* _ASM_X86_ASM_H */
--
2.13.6
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [GIT PULL 0/5] perf/urgent fixes
2017-12-18 14:39 [GIT PULL 0/5] perf/urgent fixes Arnaldo Carvalho de Melo
` (4 preceding siblings ...)
2017-12-18 14:39 ` [PATCH 5/5] x86/asm: Allow again using asm.h when building for the 'bpf' clang target Arnaldo Carvalho de Melo
@ 2017-12-18 17:11 ` Ingo Molnar
5 siblings, 0 replies; 7+ messages in thread
From: Ingo Molnar @ 2017-12-18 17:11 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: linux-kernel, linux-perf-users, Adrian Hunter,
Alexander Potapenko, Alexander Shishkin, Alexei Starovoitov,
Andrey Ryabinin, Andy Lutomirski, Arnd Bergmann, Ben Gainey,
Colin King, Daniel Borkmann, Darren Hart, David Ahern,
Dmitriy Vyukov, Heiko Carstens, Hendrik Brueckner, Jiri Olsa,
Josh Poimboeuf, Kim Phillips <kim>
* Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> Hi Ingo,
>
> This was ready already before my short vacations, and get things
> building on the recently released fedora 27 and make 'perf test' pass
> all entries, so please consider pulling,
>
> - Arnaldo
>
> Test results at the end of this message, as usual.
>
> The following changes since commit 34c9ca37aaec2e307b837bb099d3b44f0ea04ddc:
>
> tooling/headers: Synchronize updated s390 and x86 UAPI headers (2017-12-06 22:45:24 +0100)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-urgent-for-mingo-4.15-20171218
>
> for you to fetch changes up to 38ab834165924bf86fe7ee67bb5dbea56240b03f:
>
> x86/asm: Allow again using asm.h when building for the 'bpf' clang target (2017-12-15 12:30:16 -0300)
>
> ----------------------------------------------------------------
> perf/urgent fixes:
>
> - Fix up build in hardened environments, such as fedora 27 (Jiri Olsa)
>
> - Do not include header files from the kernel sources for the s/390 arch,
> fixing the detached tarball building (Arnaldo Carvalho de Melo)
>
> - Allow again using asm.h when building for the 'bpf' clang target,
> guarding x86 specific bits under ifndef __BPF__ (Arnaldo Carvalho de Melo)
>
> - Generate correct debug information for inlined code when generating
> ELF images for JITted java programs (Ben Gainey)
>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (2):
> tools arch s390: Do not include header files from the kernel sources
> x86/asm: Allow again using asm.h when building for the 'bpf' clang target
>
> Ben Gainey (1):
> perf jvmti: Generate correct debug information for inlined code
>
> Jiri Olsa (2):
> perf tools: Use shell function for perl cflags retrieval
> perf tools: Fix up build in hardened environments
>
> arch/x86/include/asm/asm.h | 2 +
> tools/arch/s390/include/uapi/asm/perf_regs.h | 43 ++++++++
> tools/perf/Makefile.config | 9 +-
> tools/perf/arch/s390/include/perf_regs.h | 2 +-
> tools/perf/check-headers.sh | 1 +
> tools/perf/jvmti/jvmti_agent.c | 16 +--
> tools/perf/jvmti/jvmti_agent.h | 7 +-
> tools/perf/jvmti/libjvmti.c | 147 ++++++++++++++++++++++-----
> 8 files changed, 185 insertions(+), 42 deletions(-)
> create mode 100644 tools/arch/s390/include/uapi/asm/perf_regs.h
Pulled, thanks a lot Arnaldo!
Ingo
^ permalink raw reply [flat|nested] 7+ messages in thread