[WebAssembly] Fix crash when __wasm_call_ctor is GCd in programs containing static init/fini
Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58864 llvm-svn: 355263
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@ -0,0 +1,48 @@
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; RUN: llc -filetype=obj -o %t.o %s
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; RUN: wasm-ld %t.o -o %t.wasm
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; RUN: obj2yaml %t.wasm | FileCheck %s
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; RUN: wasm-ld %t.o -o %t.wasm
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; RUN: obj2yaml %t.wasm | FileCheck %s
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; RUN: wasm-ld --export=__wasm_call_ctors %t.o -o %t.export.wasm
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; RUN: obj2yaml %t.export.wasm | FileCheck %s -check-prefix=EXPORT
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; Test that the __wasm_call_ctor function if not referenced
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target triple = "wasm32-unknown-unknown"
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define hidden void @_start() {
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entry:
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ret void
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}
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define hidden void @func1() {
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entry:
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ret void
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}
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define hidden void @func2() {
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entry:
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ret void
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}
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define i32 @__cxa_atexit(i32 %func, i32 %arg, i32 %dso_handle) {
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ret i32 0
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}
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@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [
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{ i32, void ()*, i8* } { i32 1, void ()* @func1, i8* null }
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]
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@llvm.global_dtors = appending global [1 x { i32, void ()*, i8* }] [
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{ i32, void ()*, i8* } { i32 1, void ()* @func2, i8* null }
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]
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; CHECK-NOT: __cxa_atexit
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; CHECK-NOT: __wasm_call_ctors
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; EXPORT: __wasm_call_ctors
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; EXPORT: func1
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; EXPORT: func2
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; EXPORT: __cxa_atexit
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@ -1168,6 +1168,9 @@ void Writer::createCtorFunction() {
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// This is then used either when creating the output linking section or to
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// synthesize the "__wasm_call_ctors" function.
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void Writer::calculateInitFunctions() {
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if (!Config->Relocatable && !WasmSym::CallCtors->isLive())
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return;
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for (ObjFile *File : Symtab->ObjectFiles) {
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const WasmLinkingData &L = File->getWasmObj()->linkingData();
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for (const WasmInitFunc &F : L.InitFunctions) {
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