1 files changed, 273 insertions, 0 deletions
diff --git a/tools/perf/scripts/python/arm-cs-trace-disasm.py b/tools/perf/scripts/python/arm-cs-trace-disasm.py
new file mode 100755
index 0000000000..d59ff53f1d
--- /dev/null
+++ b/tools/perf/scripts/python/arm-cs-trace-disasm.py
@@ -0,0 +1,273 @@
+# SPDX-License-Identifier: GPL-2.0
+# arm-cs-trace-disasm.py: ARM CoreSight Trace Dump With Disassember
+#
+# Author: Tor Jeremiassen <tor@ti.com>
+#         Mathieu Poirier <mathieu.poirier@linaro.org>
+#         Leo Yan <leo.yan@linaro.org>
+#         Al Grant <Al.Grant@arm.com>
+
+from __future__ import print_function
+import os
+from os import path
+import re
+from subprocess import *
+from optparse import OptionParser, make_option
+
+from perf_trace_context import perf_set_itrace_options, \
+	perf_sample_insn, perf_sample_srccode
+
+# Below are some example commands for using this script.
+#
+# Output disassembly with objdump:
+#  perf script -s scripts/python/arm-cs-trace-disasm.py \
+#		-- -d objdump -k path/to/vmlinux
+# Output disassembly with llvm-objdump:
+#  perf script -s scripts/python/arm-cs-trace-disasm.py \
+#		-- -d llvm-objdump-11 -k path/to/vmlinux
+# Output only source line and symbols:
+#  perf script -s scripts/python/arm-cs-trace-disasm.py
+
+# Command line parsing.
+option_list = [
+	# formatting options for the bottom entry of the stack
+	make_option("-k", "--vmlinux", dest="vmlinux_name",
+		    help="Set path to vmlinux file"),
+	make_option("-d", "--objdump", dest="objdump_name",
+		    help="Set path to objdump executable file"),
+	make_option("-v", "--verbose", dest="verbose",
+		    action="store_true", default=False,
+		    help="Enable debugging log")
+]
+
+parser = OptionParser(option_list=option_list)
+(options, args) = parser.parse_args()
+
+# Initialize global dicts and regular expression
+disasm_cache = dict()
+cpu_data = dict()
+disasm_re = re.compile("^\s*([0-9a-fA-F]+):")
+disasm_func_re = re.compile("^\s*([0-9a-fA-F]+)\s.*:")
+cache_size = 64*1024
+
+glb_source_file_name	= None
+glb_line_number		= None
+glb_dso			= None
+
+def get_optional(perf_dict, field):
+       if field in perf_dict:
+               return perf_dict[field]
+       return "[unknown]"
+
+def get_offset(perf_dict, field):
+	if field in perf_dict:
+		return "+%#x" % perf_dict[field]
+	return ""
+
+def get_dso_file_path(dso_name, dso_build_id):
+	if (dso_name == "[kernel.kallsyms]" or dso_name == "vmlinux"):
+		if (options.vmlinux_name):
+			return options.vmlinux_name;
+		else:
+			return dso_name
+
+	if (dso_name == "[vdso]") :
+		append = "/vdso"
+	else:
+		append = "/elf"
+
+	dso_path = os.environ['PERF_BUILDID_DIR'] + "/" + dso_name + "/" + dso_build_id + append;
+	# Replace duplicate slash chars to single slash char
+	dso_path = dso_path.replace('//', '/', 1)
+	return dso_path
+
+def read_disam(dso_fname, dso_start, start_addr, stop_addr):
+	addr_range = str(start_addr) + ":" + str(stop_addr) + ":" + dso_fname
+
+	# Don't let the cache get too big, clear it when it hits max size
+	if (len(disasm_cache) > cache_size):
+		disasm_cache.clear();
+
+	if addr_range in disasm_cache:
+		disasm_output = disasm_cache[addr_range];
+	else:
+		start_addr = start_addr - dso_start;
+		stop_addr = stop_addr - dso_start;
+		disasm = [ options.objdump_name, "-d", "-z",
+			   "--start-address="+format(start_addr,"#x"),
+			   "--stop-address="+format(stop_addr,"#x") ]
+		disasm += [ dso_fname ]
+		disasm_output = check_output(disasm).decode('utf-8').split('\n')
+		disasm_cache[addr_range] = disasm_output
+
+	return disasm_output
+
+def print_disam(dso_fname, dso_start, start_addr, stop_addr):
+	for line in read_disam(dso_fname, dso_start, start_addr, stop_addr):
+		m = disasm_func_re.search(line)
+		if m is None:
+			m = disasm_re.search(line)
+			if m is None:
+				continue
+		print("\t" + line)
+
+def print_sample(sample):
+	print("Sample = { cpu: %04d addr: 0x%016x phys_addr: 0x%016x ip: 0x%016x " \
+	      "pid: %d tid: %d period: %d time: %d }" % \
+	      (sample['cpu'], sample['addr'], sample['phys_addr'], \
+	       sample['ip'], sample['pid'], sample['tid'], \
+	       sample['period'], sample['time']))
+
+def trace_begin():
+	print('ARM CoreSight Trace Data Assembler Dump')
+
+def trace_end():
+	print('End')
+
+def trace_unhandled(event_name, context, event_fields_dict):
+	print(' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())]))
+
+def common_start_str(comm, sample):
+	sec = int(sample["time"] / 1000000000)
+	ns = sample["time"] % 1000000000
+	cpu = sample["cpu"]
+	pid = sample["pid"]
+	tid = sample["tid"]
+	return "%16s %5u/%-5u [%04u] %9u.%09u  " % (comm, pid, tid, cpu, sec, ns)
+
+# This code is copied from intel-pt-events.py for printing source code
+# line and symbols.
+def print_srccode(comm, param_dict, sample, symbol, dso):
+	ip = sample["ip"]
+	if symbol == "[unknown]":
+		start_str = common_start_str(comm, sample) + ("%x" % ip).rjust(16).ljust(40)
+	else:
+		offs = get_offset(param_dict, "symoff")
+		start_str = common_start_str(comm, sample) + (symbol + offs).ljust(40)
+
+	global glb_source_file_name
+	global glb_line_number
+	global glb_dso
+
+	source_file_name, line_number, source_line = perf_sample_srccode(perf_script_context)
+	if source_file_name:
+		if glb_line_number == line_number and glb_source_file_name == source_file_name:
+			src_str = ""
+		else:
+			if len(source_file_name) > 40:
+				src_file = ("..." + source_file_name[-37:]) + " "
+			else:
+				src_file = source_file_name.ljust(41)
+
+			if source_line is None:
+				src_str = src_file + str(line_number).rjust(4) + " <source not found>"
+			else:
+				src_str = src_file + str(line_number).rjust(4) + " " + source_line
+		glb_dso = None
+	elif dso == glb_dso:
+		src_str = ""
+	else:
+		src_str = dso
+		glb_dso = dso
+
+	glb_line_number = line_number
+	glb_source_file_name = source_file_name
+
+	print(start_str, src_str)
+
+def process_event(param_dict):
+	global cache_size
+	global options
+
+	sample = param_dict["sample"]
+	comm = param_dict["comm"]
+
+	name = param_dict["ev_name"]
+	dso = get_optional(param_dict, "dso")
+	dso_bid = get_optional(param_dict, "dso_bid")
+	dso_start = get_optional(param_dict, "dso_map_start")
+	dso_end = get_optional(param_dict, "dso_map_end")
+	symbol = get_optional(param_dict, "symbol")
+
+	if (options.verbose == True):
+		print("Event type: %s" % name)
+		print_sample(sample)
+
+	# If cannot find dso so cannot dump assembler, bail out
+	if (dso == '[unknown]'):
+		return
+
+	# Validate dso start and end addresses
+	if ((dso_start == '[unknown]') or (dso_end == '[unknown]')):
+		print("Failed to find valid dso map for dso %s" % dso)
+		return
+
+	if (name[0:12] == "instructions"):
+		print_srccode(comm, param_dict, sample, symbol, dso)
+		return
+
+	# Don't proceed if this event is not a branch sample, .
+	if (name[0:8] != "branches"):
+		return
+
+	cpu = sample["cpu"]
+	ip = sample["ip"]
+	addr = sample["addr"]
+
+	# Initialize CPU data if it's empty, and directly return back
+	# if this is the first tracing event for this CPU.
+	if (cpu_data.get(str(cpu) + 'addr') == None):
+		cpu_data[str(cpu) + 'addr'] = addr
+		return
+
+	# The format for packet is:
+	#
+	#		  +------------+------------+------------+
+	#  sample_prev:   |    addr    |    ip	    |	 cpu	 |
+	#		  +------------+------------+------------+
+	#  sample_next:   |    addr    |    ip	    |	 cpu	 |
+	#		  +------------+------------+------------+
+	#
+	# We need to combine the two continuous packets to get the instruction
+	# range for sample_prev::cpu:
+	#
+	#     [ sample_prev::addr .. sample_next::ip ]
+	#
+	# For this purose, sample_prev::addr is stored into cpu_data structure
+	# and read back for 'start_addr' when the new packet comes, and we need
+	# to use sample_next::ip to calculate 'stop_addr', plusing extra 4 for
+	# 'stop_addr' is for the sake of objdump so the final assembler dump can
+	# include last instruction for sample_next::ip.
+	start_addr = cpu_data[str(cpu) + 'addr']
+	stop_addr  = ip + 4
+
+	# Record for previous sample packet
+	cpu_data[str(cpu) + 'addr'] = addr
+
+	# Handle CS_ETM_TRACE_ON packet if start_addr=0 and stop_addr=4
+	if (start_addr == 0 and stop_addr == 4):
+		print("CPU%d: CS_ETM_TRACE_ON packet is inserted" % cpu)
+		return
+
+	if (start_addr < int(dso_start) or start_addr > int(dso_end)):
+		print("Start address 0x%x is out of range [ 0x%x .. 0x%x ] for dso %s" % (start_addr, int(dso_start), int(dso_end), dso))
+		return
+
+	if (stop_addr < int(dso_start) or stop_addr > int(dso_end)):
+		print("Stop address 0x%x is out of range [ 0x%x .. 0x%x ] for dso %s" % (stop_addr, int(dso_start), int(dso_end), dso))
+		return
+
+	if (options.objdump_name != None):
+		# It doesn't need to decrease virtual memory offset for disassembly
+		# for kernel dso, so in this case we set vm_start to zero.
+		if (dso == "[kernel.kallsyms]"):
+			dso_vm_start = 0
+		else:
+			dso_vm_start = int(dso_start)
+
+		dso_fname = get_dso_file_path(dso, dso_bid)
+		if path.exists(dso_fname):
+			print_disam(dso_fname, dso_vm_start, start_addr, stop_addr)
+		else:
+			print("Failed to find dso %s for address range [ 0x%x .. 0x%x ]" % (dso, start_addr, stop_addr))
+
+	print_srccode(comm, param_dict, sample, symbol, dso)