vmprof-python
vmprof-python copied to clipboard
Flush buffers before reading back in to construct all seen addresses
When disabling profiling, the log of samples written is read back in by LogReaderDumpNative
to construct a deduplicated set of all code addresses that were recorded during sampling. This set is then passed to _vmprof.write_all_code_objects
to write out the address and file/symbol info.
However if the last call to commit_buffer
is a short write (for example because it was interrupted by a signal), then the LogReader may not be able to parse the tail of the file because we may still have pending un-flushed buffers (see: _write_single_ready_buffer
).
This change adds a function to ensure all pending buffers are flushed to disk before attempting to reread them with the LogReader.