| from debuginfo_trace_writer import DebugInfoTraceWriter |
| import sys |
| |
| ''' |
| Generate a trace simulating an exec. When an exec happens, the address space |
| of the process is reset (previously loaded libraries are not there anymore, |
| and the main executable is replaced), so any know mapping should be forgotten. |
| In the trace, this is represented by a new statedump (when the liblttng-ust.so |
| library is loaded again in the new address space, its constructor is called |
| again, which initiates a new statedump). |
| ''' |
| |
| if len(sys.argv) < 2: |
| print("Please provide trace output path.", file=sys.stderr) |
| sys.exit(1) |
| |
| def timestamp_generator(): |
| ts = 1 |
| while True: |
| yield ts |
| ts += 1 |
| |
| vpid = 1337 |
| ts = timestamp_generator() |
| gen = DebugInfoTraceWriter(sys.argv[1]) |
| |
| baddr = 0x400000 |
| memsz = 0x10000 |
| |
| gen.write_lttng_ust_statedump_start(next(ts), 0, vpid) |
| gen.write_lttng_ust_statedump_bin_info(next(ts), 0, vpid, baddr, memsz, "/tmp/foo", 0, 0, 0) |
| gen.write_lttng_ust_statedump_end(next(ts), 0, vpid) |
| gen.write_dummy_event(next(ts), 0, vpid, 0x400100) |
| |
| baddr = 0x500000 |
| memsz = 0x10000 |
| |
| gen.write_lttng_ust_statedump_start(next(ts), 0, vpid) |
| gen.write_lttng_ust_statedump_bin_info(next(ts), 0, vpid, baddr, memsz, "/tmp/bar", 0, 0, 0) |
| gen.write_lttng_ust_statedump_end(next(ts), 0, vpid) |
| # This event should not map to anything currently loaded. |
| gen.write_dummy_event(next(ts), 0, vpid, 0x400100) |
| gen.write_dummy_event(next(ts), 0, vpid, 0x500100) |
| |
| gen.flush() |
