Reland "[wasm] trap handlers: fall back on old signal handler"
This is a reland of ee4fe896 Original change's description: > [wasm] trap handlers: fall back on old signal handler > > This is primarily needed to test D8 under ASan. ASan installs a signal handler > early in the process startup to show stack traces from crashes. We need to make > sure that if V8 does not handle a signal then the existing handler gets a > chance. > > This change only applies when using V8's default signal handler. When > integrating with the embedder's signal handler the behavior is unchanged. > > Bug: chromium:771948 > Change-Id: Ifd560acf9700ec5f714f009530258fa92c83cabe > Reviewed-on: https://chromium-review.googlesource.com/705823 > Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> > Commit-Queue: Eric Holk <eholk@chromium.org> > Cr-Commit-Position: refs/heads/master@{#48429} Bug: chromium:771948 Change-Id: Ide307091c432fd933c48f89c51851b8dce44dd30 Reviewed-on: https://chromium-review.googlesource.com/710114Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> Commit-Queue: Eric Holk <eholk@chromium.org> Cr-Commit-Position: refs/heads/master@{#48435}
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