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make instrumentation "work" on wasm

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Using instrumentation on WASM causes it to complain about the
llvm.returnaddress instrinsic. This PR could be considered a "hack" but
makes this work by just passing `nil` instead of the return address.
This commit is contained in:
Laytan Laats
2024-07-11 01:57:00 +02:00
parent d43a2daa17
commit 65ca03a930
1 changed files with 12 additions and 8 deletions
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20
src/llvm_backend_opt.cpp
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@@ -398,16 +398,20 @@ gb_internal LLVMValueRef lb_run_instrumentation_pass_insert_call(lbProcedure *p,
LLVMValueRef args[3] = {};
args[0] = p->value;
LLVMValueRef returnaddress_args[1] = {};
if (is_arch_wasm()) {
args[1] = LLVMConstPointerNull(lb_type(m, t_rawptr));
} else {
LLVMValueRef returnaddress_args[1] = {};
returnaddress_args[0] = LLVMConstInt(LLVMInt32TypeInContext(m->ctx), 0, false);
returnaddress_args[0] = LLVMConstInt(LLVMInt32TypeInContext(m->ctx), 0, false);
char const *instrinsic_name = "llvm.returnaddress";
unsigned id = LLVMLookupIntrinsicID(instrinsic_name, gb_strlen(instrinsic_name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", instrinsic_name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, nullptr, 0);
LLVMTypeRef call_type = LLVMIntrinsicGetType(m->ctx, id, nullptr, 0);
args[1] = LLVMBuildCall2(dummy_builder, call_type, ip, returnaddress_args, gb_count_of(returnaddress_args), "");
char const *instrinsic_name = "llvm.returnaddress";
unsigned id = LLVMLookupIntrinsicID(instrinsic_name, gb_strlen(instrinsic_name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", instrinsic_name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, nullptr, 0);
LLVMTypeRef call_type = LLVMIntrinsicGetType(m->ctx, id, nullptr, 0);
args[1] = LLVMBuildCall2(dummy_builder, call_type, ip, returnaddress_args, gb_count_of(returnaddress_args), "");
}
Token name = {};
if (p->entity) {