| @@ -40,6 +40,7 @@ pub unsafe fn _Unwind_DeleteException(exception: *mut _Unwind_Exception) { |
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} |
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pub unsafe fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code { |
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+#[cfg(panic = "unwind")] |
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extern "C" { |
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/// LLVM lowers this intrinsic to the `throw` instruction. |
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// FIXME(coolreader18): move to stdarch |
| @@ -52,5 +53,13 @@ pub unsafe fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwi |
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// via integers, with 0 corresponding to C++ exceptions and 1 to C setjmp()/longjmp(). |
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// Ideally, we'd be able to choose something unique for Rust, but for now, |
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// we pretend to be C++ and implement the Itanium exception-handling ABI. |
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-wasm_throw(0, exception.cast()) |
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+ cfg_if::cfg_if! { |
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+// for now, unless we're -Zbuild-std with panic=unwind, never codegen a throw. |
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+if #[cfg(panic = "unwind")] { |
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+ wasm_throw(0, exception.cast()) |
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+} else { |
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+let _ = exception; |
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+ core::arch::wasm32::unreachable() |
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+} |
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+} |
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} |