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Evaluate request: return memory reference (take 2) #1067

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Evaluate request: return memory reference (take 2) #1067

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48 changes: 29 additions & 19 deletions adapter/codelldb/src/debug_session/variables.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -224,25 +224,7 @@ impl super::DebugSession {
})
};

let mem_ref = match self.client_caps.supports_memory_references {
Some(true) => {
match var.value_type() {
// Assume that the register value is an address, and use that.
// So users can dump memory, e.g. as the SP, RIP+offset, etc.
ValueType::Register => Some(format!("0x{:X}", var.value_as_unsigned(0))),
// TODO: if it's a literal and looks like an address (e.g. some
// sort of integer, use that as the addres)
_ => {
let load_addr = var.load_address();
match load_addr {
lldb::INVALID_ADDRESS => None,
_ => Some(format!("0x{:X}", load_addr)),
}
}
}
}
_ => None,
};
let mem_ref = self.get_mem_ref_for_var(var);

let is_settable = match var.type_().basic_type() {
BasicType::Char
Expand Down Expand Up @@ -455,6 +437,33 @@ impl super::DebugSession {
Err(AsyncResponse(Box::new(future::ready(result))).into())
}

fn get_mem_ref_for_var(&self, var: &SBValue) -> Option<String> {
match self.client_caps.supports_memory_references {
Some(true) => {
match var.value_type() {
// Assume that the register value is an address, and use that.
// So users can dump memory, e.g. as the SP, RIP+offset, etc.
ValueType::Register => Some(format!("0x{:X}", var.value_as_unsigned(0))),
_ => {
if var.type_().is_pointer_type() {
// Any pointer type is itself a memory address.
// This allows users to dump any arbitrary address
// e.g. using the expression (void*)0x1234.
Some(format!("0x{:X}", var.value_as_unsigned(0)))
} else {
let load_addr = var.load_address();
match load_addr {
lldb::INVALID_ADDRESS => None,
_ => Some(format!("0x{:X}", load_addr)),
}
}
}
}
}
_ => None,
}
}

fn handle_execute_command(
&mut self,
command: &str,
Expand Down Expand Up @@ -499,6 +508,7 @@ impl super::DebugSession {
result: self.get_var_summary(&sbval, handle.is_some()),
type_: sbval.display_type_name().map(|s| s.to_owned()),
variables_reference: handles::to_i64(handle),
memory_reference: self.get_mem_ref_for_var(&sbval),
..Default::default()
})
}
Expand Down