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f62370290a
This PR implements a register context for Wasm, which uses virtual registers to resolve Wasm local, globals and stack values. The registers are used to implement support for `DW_OP_WASM_location` in the DWARF expression evaluator (#151010). This also adds a more comprehensive test, showing that we can use this to show local variables.
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "ThreadWasm.h"
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#include "ProcessWasm.h"
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#include "RegisterContextWasm.h"
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#include "UnwindWasm.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::wasm;
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Unwind &ThreadWasm::GetUnwinder() {
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if (!m_unwinder_up) {
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assert(CalculateTarget()->GetArchitecture().GetMachine() ==
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llvm::Triple::wasm32);
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m_unwinder_up.reset(new wasm::UnwindWasm(*this));
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}
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return *m_unwinder_up;
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}
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llvm::Expected<std::vector<lldb::addr_t>> ThreadWasm::GetWasmCallStack() {
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if (ProcessSP process_sp = GetProcess()) {
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ProcessWasm *wasm_process = static_cast<ProcessWasm *>(process_sp.get());
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return wasm_process->GetWasmCallStack(GetID());
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}
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return llvm::createStringError("no process");
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}
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lldb::RegisterContextSP
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ThreadWasm::CreateRegisterContextForFrame(StackFrame *frame) {
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uint32_t concrete_frame_idx = 0;
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ProcessSP process_sp(GetProcess());
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ProcessWasm *wasm_process = static_cast<ProcessWasm *>(process_sp.get());
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if (frame)
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concrete_frame_idx = frame->GetConcreteFrameIndex();
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if (concrete_frame_idx == 0)
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return std::make_shared<RegisterContextWasm>(
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*this, concrete_frame_idx, wasm_process->GetRegisterInfo());
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return GetUnwinder().CreateRegisterContextForFrame(frame);
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}
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