perf tools: decoding capailitity for CoreSight traces

Added user space perf functionality for CoreSight trace decoding.

Author: tor-jeremiassen

tools/perf/Makefile.perf

@@ -77,6 +77,9 @@ include config/utilities.mak
 # Define NO_AUXTRACE if you do not want AUX area tracing support
 #
 # Define NO_LIBBPF if you do not want BPF support
+#
+# Define NO_CSTRACE if you do not want CoreSight trace decoding support
+#
 
 # As per kernel Makefile, avoid funny character set dependencies
 unexport LC_ALL

tools/perf/builtin-script.c

@@ -92,7 +92,8 @@ static struct {
 
 		.fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 			      PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
-			      PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
+			      PERF_OUTPUT_EVNAME | PERF_OUTPUT_ADDR |
+                              PERF_OUTPUT_IP |
 			      PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
 			      PERF_OUTPUT_PERIOD,
 

tools/perf/config/Makefile

@@ -433,6 +433,24 @@ endif
 grep-libs  = $(filter -l%,$(1))
 strip-libs = $(filter-out -l%,$(1))
 
+ifdef CSTRACE_PATH
+  ifeq (${IS_64_BIT}, 1)
+    CSTRACE_LNX = linux64
+  else
+    CSTRACE_LNX = linux
+  endif
+  ifdef DEBUG
+    LIBCSTRACE = -lcstraced_c_api -lcstraced
+    CSTRACE_LIB_PATH = $(CSTRACE_PATH)/lib/$(CSTRACE_LNX)/dbg
+  else
+    LIBCSTRACE = -lcstrace_c_api -lcstrace
+    CSTRACE_LIB_PATH = $(CSTRACE_PATH)/lib/$(CSTRACE_LNX)/rel
+  endif
+  $(call detected,CSTRACE)
+  $(call detected_var,CSTRACE_PATH)
+  EXTLIBS += -L$(CSTRACE_LIB_PATH) $(LIBCSTRACE) -lstdc++
+endif
+
 ifdef NO_LIBPERL
   CFLAGS += -DNO_LIBPERL
 else

tools/perf/util/Build

@@ -84,6 +84,8 @@ libperf-$(CONFIG_AUXTRACE) += auxtrace.o
 libperf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
 libperf-$(CONFIG_AUXTRACE) += intel-pt.o
 libperf-$(CONFIG_AUXTRACE) += intel-bts.o
+libperf-$(CONFIG_AUXTRACE) += cs-etm.o
+libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
 libperf-y += parse-branch-options.o
 libperf-y += parse-regs-options.o
 

tools/perf/util/auxtrace.c

@@ -49,6 +49,7 @@
 
 #include "intel-pt.h"
 #include "intel-bts.h"
+#include "cs-etm.h"
 
 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 			struct auxtrace_mmap_params *mp,
@@ -893,6 +894,7 @@ int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
 	case PERF_AUXTRACE_INTEL_BTS:
 		return intel_bts_process_auxtrace_info(event, session);
 	case PERF_AUXTRACE_CS_ETM:
+		return cs_etm__process_auxtrace_info(event, session);
 	case PERF_AUXTRACE_UNKNOWN:
 	default:
 		return -EINVAL;

tools/perf/util/build-id.c

@@ -145,7 +145,7 @@ static int asnprintf(char **strp, size_t size, const char *fmt, ...)
 	return ret;
 }
 
-static char *build_id__filename(const char *sbuild_id, char *bf, size_t size)
+char *build_id__filename(const char *sbuild_id, char *bf, size_t size)
 {
 	char *tmp = bf;
 	int ret = asnprintf(&bf, size, "%s/.build-id/%.2s/%s", buildid_dir,

tools/perf/util/build-id.h

@@ -11,6 +11,7 @@
 extern struct perf_tool build_id__mark_dso_hit_ops;
 struct dso;
 
+char *build_id__filename(const char *sbuild_id, char *bf, size_t size);
 int build_id__sprintf(const u8 *build_id, int len, char *bf);
 int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id);
 int filename__sprintf_build_id(const char *pathname, char *sbuild_id);

tools/perf/util/cs-etm-decoder/Build

@@ -0,0 +1,7 @@
+ifeq ($(CSTRACE_PATH),)
+libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder-stub.o
+else
+CFLAGS_cs-etm-decoder.o += -I$(CSTRACE_PATH)/include
+libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o
+endif
+

tools/perf/util/cs-etm-decoder/cs-etm-decoder-stub.c

@@ -0,0 +1,91 @@
+/*
+ *
+ * Copyright(C) 2015 Linaro Limited. All rights reserved.
+ * Author: Tor Jeremiassen <tor.jeremiassen@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU GEneral Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+
+#include "cs-etm-decoder.h"
+#include "../util.h"
+
+
+struct cs_etm_decoder
+{
+        void *state;
+        int dummy;
+};
+
+int cs_etm_decoder__flush(struct cs_etm_decoder *decoder)
+{
+        (void) decoder;
+        return -1;
+}
+
+int cs_etm_decoder__add_bin_file(struct cs_etm_decoder *decoder, uint64_t offset, uint64_t address, uint64_t len, const char *fname)
+{
+        (void) decoder;
+        (void) offset;
+        (void) address;
+        (void) len;
+        (void) fname;
+        return -1;
+}
+
+const struct cs_etm_state *cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
+                                       uint64_t indx,
+                                       const uint8_t *buf,
+                                       size_t len,
+                                       size_t *consumed)
+{
+        (void) decoder;
+        (void) indx;
+        (void) buf;
+        (void) len;
+        (void) consumed;
+        return NULL;
+}
+
+int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder, uint64_t address, uint64_t len, cs_etm_mem_cb_type cb_func)
+{
+        (void) decoder;
+        (void) address;
+        (void) len;
+        (void) cb_func;
+        return -1;
+}
+
+int cs_etm_decoder__get_packet(struct cs_etm_decoder *decoder, 
+                               struct cs_etm_packet *packet)
+{
+        (void) decoder;
+        (void) packet;
+        return -1;
+}
+
+struct cs_etm_decoder *cs_etm_decoder__new(uint32_t num_cpu, struct cs_etm_decoder_params *d_params, struct cs_etm_trace_params t_params[])
+{
+        (void) num_cpu;
+        (void) d_params;
+        (void) t_params;
+        return NULL;
+}
+
+
+void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
+{
+        (void) decoder;
+        return;
+}