tree abeb154f258ab883c1b1424198d508f1b73e5c5c
parent 8fc70b190754fea3c61719185a10c937180f73fc
author Ryan Macnak <rmacnak@google.com> 1646951906 +0000
committer Commit Bot <commit-bot@chromium.org> 1646951906 +0000

[vm, compiler] Match the C frame pointer convention on RISC-V.

The RISC-V frame pointer convention is different from that of x86 and ARM. FP is the caller's SP, and the saved FP is at FP[-2] instead of FP[0].

Making Dart frames match the convention of C frames allows stack walkers to continue their traversals through transitions between Dart and C (e.g., for stack dumps or profiling).

TEST=ci
Change-Id: I463348beba70c1a75bfb0d902b3391be524de0fe
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/235960
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>