Add observe_native_calls (CLI: observe-native-calls <path> <input-json>). It
launches the active Mach-O as an owned process under `lldb --batch`, stops at
caller-selected functions or Objective-C methods, records each entry and
auto-continues:
- thread, image, symbol, load and file address;
- raw integer argument registers and optional caller frames;
- for methods, the selector read from _cmd and the receiver's dynamic class,
from LLDB's runtime reader without running target code.
No expression is evaluated and no existing process is attached. The run ends
on exit, max_events or duration_ms; REA then kills the process and confirms
that it is gone. The result also carries exit status, bounded stdout/stderr,
breakpoint resolution with partial coverage for unresolved requests, and
limitations. A target LLDB may not debug fails with a debugger-attach-denied
reason and remediation.
verify:native-calls checks the tool through the CLI and stdio MCP against a
compiled fixture, compares breakpoint addresses with nm, exercises every
outcome, and checks hardened-runtime targets with and without get-task-allow.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Kaoru0822