Files
ppsspp/Tools/wsdbg/Cargo.lock
T
Henrik Rydgård 1e35f00965 wsdbg: add :snapshot/:snapshots/:diff for quick memory comparisons
New REPL-only commands, kept entirely client-side (no new PPSSPP-side
event) since a snapshot is a debugging-session-scoped concept with no
real emulator-side meaning - memory.read's existing base64 response is
already the only primitive actually needed:

- :snapshot <name> <address> <size> - blocks on a memory.read (unlike the
  rest of the REPL, which is fire-and-forget or just waits without
  looking at the payload) and stores the decoded bytes locally under
  <name>. address/size are passed through to the server exactly as
  typed, same as any other event param.
- :snapshots - list what's been captured so far.
- :diff <name1> <name2> - byte-compare two snapshots, printing each
  differing run as "+offset (N bytes): old_hex -> new_hex".

Replaces the throwaway PowerShell/Bash diffing scripts written by hand at
least twice during the VSH boot investigation (see
docs/VSHBootInvestigation.md - the sceBSMan before/after test, and the GE
display list re-checks) with one correct, reusable implementation. In
memory only for now (lives as long as the wsdbg process does, which is
fine for the actual usage pattern - one piped batch of commands per
invocation, same as everything else in this tool); can add disk
persistence later if a real need for cross-invocation snapshots comes up.

Verified live against PPSSPPHeadless: snapshot/list/diff (both a
real detected difference and an identical-buffer comparison) all produce
correct output.
2026-08-14 11:04:32 +02:00

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