da419bdb5e
Summary: This adds support for the 'event section' specified in the exception handling proposal. (This was named 'exception section' first, but later renamed to 'event section' to take possibilities of other kinds of events into consideration. But currently we only store exception info in this section.) The event section is added between the global section and the export section. This is for ease of validation per request of the V8 team. This patch: - Creates the event symbol type, which is a weak symbol - Makes 'throw' instruction take the event symbol '__cpp_exception' - Adds relocation support for events - Adds WasmObjectWriter / WasmObjectFile (Reader) support - Adds obj2yaml / yaml2obj support - Adds '.eventtype' printing support Reviewers: dschuff, sbc100, aardappel Subscribers: jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D54096 llvm-svn: 346825
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
//===-- WasmException.h - Wasm Exception Framework -------------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing WebAssembly exception info into asm
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// files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WASMEXCEPTION_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_WASMEXCEPTION_H
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#include "EHStreamer.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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namespace llvm {
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class LLVM_LIBRARY_VISIBILITY WasmException : public EHStreamer {
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public:
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WasmException(AsmPrinter *A) : EHStreamer(A) {}
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void endModule() override;
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void beginFunction(const MachineFunction *MF) override {}
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virtual void markFunctionEnd() override;
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void endFunction(const MachineFunction *MF) override;
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protected:
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// Compute the call site table for wasm EH.
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void computeCallSiteTable(
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SmallVectorImpl<CallSiteEntry> &CallSites,
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const SmallVectorImpl<const LandingPadInfo *> &LandingPads,
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const SmallVectorImpl<unsigned> &FirstActions) override;
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};
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} // End of namespace llvm
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#endif
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