1d4e04f7a7
On Wasm, it's not currently possibly to change which `personality` is attached to a given IR function. This is primarily because no matter what `personality` is attached, codegen creates a call to a `Unwind_CallPersonality` wrapper hard-coded to call c++abi's personality. In order to allow alternative personalities without introducing bloat at each personality call site, this PR adjusts the ABI of the personality on Wasm. `Unwind_CallPersonality` is moved to `libcxxabi` under the name `__gxx_wasm_personality_v0`, with the "real" personality code renamed `__gxx_personality_imp` and called by `__gxx_wasm_personality_v0` (after resetting the landing pad context). The signature of EH personalities on Wasm is now `int personality(void* exception_object)` (where the int return is `_Unwind_Reason_Code` and the `void*` is `_Unwind_Exception*`), and personalities are expected to `__wasm_lpad_context.selector = 0;`. Based on #175202 |
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| .. | ||
| mach-o | ||
| __libunwind_config.h | ||
| CMakeLists.txt | ||
| libunwind.h | ||
| libunwind.modulemap | ||
| unwind.h | ||
| unwind_arm_ehabi.h | ||
| unwind_itanium.h | ||
| unwind_wasm.h | ||