sascha/devlib
1
0
Fork 0
mirror of https://github.com/ARM-software/devlib.git synced 2025-11-04 07:51:21 +00:00
Code Issues Releases Wiki Activity

trace/ftrace: Only require CONFIG_FUNCTION_PROFILER for the function profiling

Browse Source 
We currently raise an exception when trying to use the 'function' or
'function_graph' tracer if the kernel wasn't compiled
CONFIG_FUNCTION_PROFILER, but that is a completely valid use.
This commit is contained in:
Valentin Schneider
2019-11-26 17:43:18 +00:00
committed by Marc Bonnici
parent 745dc9499a
commit 72be3d01f8
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
devlib/trace/ftrace.py
View File

@@ -161,9 +161,6 @@ class FtraceCollector(TraceCollector):
# Check for function tracing support # Check for function tracing support
if self.functions: if self.functions:
if not self.target.file_exists(self.function_profile_file):
raise TargetStableError('Function profiling not supported. '\
'A kernel build with CONFIG_FUNCTION_PROFILER enable is required')
# Validate required functions to be traced # Validate required functions to be traced
available_functions = self.target.execute( available_functions = self.target.execute(
'cat {}'.format(self.available_functions_file), 'cat {}'.format(self.available_functions_file),
@@ -178,7 +175,11 @@ class FtraceCollector(TraceCollector):
else: else:
selected_functions.append(function) selected_functions.append(function)
# Function profiling
if self.tracer is None: if self.tracer is None:
if not self.target.file_exists(self.function_profile_file):
raise TargetStableError('Function profiling not supported. '\
'A kernel build with CONFIG_FUNCTION_PROFILER enable is required')
self.function_string = _build_trace_functions(selected_functions) self.function_string = _build_trace_functions(selected_functions)
# If function profiling is enabled we always need at least one event. # If function profiling is enabled we always need at least one event.
# Thus, if not other events have been specified, try to add at least # Thus, if not other events have been specified, try to add at least