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For a wasmexport wrapper, we generate a call to the actual exported Go function, and use the wrapper function's PC 1 as the (fake) return address. This address is not used for returning, which is handled by the Wasm call stack. It is used for stack unwinding, and PC 1 makes it past the prologue and therefore has the right SP delta. But if the function has no arguments and results, the wrapper is frameless, with no prologue, and PC 1 doesn't exist. This causes the unwinder to fail. In this case, we put PC 0, which also has the correct SP delta (0). Fixes #69584. Change-Id: Ic047a6e62100db540b5099cc5a56a1d0f16d58b9 Reviewed-on: https://go-review.googlesource.com/c/go/+/624000 Reviewed-by: David Chase <drchase@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> |
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