Bring the cvar-gated JSONL extraction tracer (event_log) forward from the
phase-a-tracing line so args/args_resolved + file.read events are
available alongside the GPU draw logging. Purely additive:
- src/xenia/kernel/event_log.{cc,h}: the tracer (auto-globbed into the
kernel target). Tier 1 fills kernel.call args (raw r3..r10) +
args_resolved.path under --phase_a_trace_args; Tier 2 resolves
NtReadFile handle->path via the object table and emits file.read.
- cpu_flags: phase_a_event_log_path / _mem_writes / _trace_args /
_hash_probe / kernel_emit_contention (all default-off).
- shim_utils.h: phase_a_bridge decl + EmitImportAndCallWithCtx/EmitReturn
hooks in the active X::Trampoline, skipped when Enabled() is false.
Deliberately EXCLUDES the Tier-3 hash-probe HIR/emitter trap (the IPFB
name-hash was recovered statically, so the probe is moot). The
phase_a_hash_probe cvar is defined but inert.
Default-off => instrument-current behaviour byte-identical when unused.
Not yet compile-verified against instrument-current's toolchain.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
a40bc50159