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Implement FIXME in debug/src/expression.rs (#902)

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This commit is contained in:
Yury Delendik
2020-02-04 18:47:20 -06:00
committed by GitHub
parent 1bfca842b0
commit b3ac718421
4 changed files with 82 additions and 4 deletions
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17
crates/debug/src/transform/expression.rs
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@@ -119,16 +119,27 @@ fn map_reg(reg: RegUnit) -> Register {
}
fn translate_loc(loc: ValueLoc, frame_info: Option<&FunctionFrameInfo>) -> Option<Vec<u8>> {
use gimli::write::Writer;
match loc {
ValueLoc::Reg(reg) => {
let machine_reg = map_reg(reg).0 as u8;
assert_lt!(machine_reg, 32); // FIXME
Some(vec![gimli::constants::DW_OP_reg0.0 + machine_reg])
Some(if machine_reg < 32 {
vec![gimli::constants::DW_OP_reg0.0 + machine_reg]
} else {
let endian = gimli::RunTimeEndian::Little;
let mut writer = write::EndianVec::new(endian);
writer
.write_u8(gimli::constants::DW_OP_regx.0 as u8)
.expect("regx");
writer
.write_uleb128(machine_reg.into())
.expect("machine_reg");
writer.into_vec()
})
}
ValueLoc::Stack(ss) => {
if let Some(frame_info) = frame_info {
if let Some(ss_offset) = frame_info.stack_slots[ss].offset {
use gimli::write::Writer;
let endian = gimli::RunTimeEndian::Little;
let mut writer = write::EndianVec::new(endian);
writer