• Paolo Severini's avatar
    Wasm debugging with LLDB: access Wasm engine state · 74e93186
    Paolo Severini authored
    This changelist makes the GDB-stub actually execute GDB-remote commands, by
    accessing the Wasm engine state. More precisely:
    - class GdbServer registers DebugDelegates that receive debug notifications when
      a new Wasm module is loaded, when execution suspends at a breakpoint or for an
      unhandled exception.
    - Since the GDB-remote commands arrive on a separate thread, all
      queries from the debugger are transformed into Task objects, that are posted
      into a TaskRunner that runs in the Isolate thread.
    - class WasmModuleDebug contains the logic to retrieve the value of globals, locals, memory ranges from the
      Wasm engine and to add/remove breakpoints.
    
    Build with: v8_enable_wasm_gdb_remote_debugging = true
    Run with: --wasm-gdb-remote
    Test with: python tools\run-tests.py --outdir=out\debug_x64 debugging -j 1
    
    Bug: chromium:1010467
    Change-Id: I9703894620a027d3c920926db92e2ff809d84ab8
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1941139Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
    Reviewed-by: 's avatarClemens Backes <clemensb@chromium.org>
    Commit-Queue: Paolo Severini <paolosev@microsoft.com>
    Cr-Commit-Position: refs/heads/master@{#67412}
    74e93186
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