================
@@ -2595,6 +2604,37 @@ bool DWARFExpression::Evaluate(
break;
}
+ case DW_OP_WASM_location: {
+ uint8_t wasm_op = opcodes.GetU8(&offset);
+ uint32_t index;
+
+ /* LLDB doesn't have an address space to represents WebAssembly locals,
+ * globals and operand stacks.
+ * We encode these elements into virtual registers:
+ * | tag: 2 bits | index: 30 bits |
+ * where tag is:
+ * 0: Not a WebAssembly location
+ * 1: Local
+ * 2: Global
+ * 3: Operand stack value
----------------
paolosevMSFT wrote:
It is better to keep the tag '0' to represent normal (non-Wasm-location)
registers like PC, so I would keep the values like this. But for readability we
can add a static function `WasmVirtualRegisterKinds
WasmVirtualRegisterInfo::VirtualRegisterKindFromDWARFLocation(DWARFWasmLocation
dwarf_location)` that does this conversion from the DWARF representation into
the virtual register tag.
https://github.com/llvm/llvm-project/pull/77949
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