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emit YUL builtins debug line info and fix debug info source file (#358)

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This PR fixes and enhances debug info generation:
1. Adds line information for each lowered YUL builtin and the `if`
statement.
2. Fixes the debug info source path to match the YUL file of the
contract dumped to the `--debug-output-dir`.

This improves inspection of the generated code a lot. Excerpt from
`llvm-objdump -Sl /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.so`:

```
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:203
;                 let _1 := memoryguard(0x80)
   13c3e: 3aa5b023      sd      a0, 0x3a0(a1)
   13c42: 38a5bc23      sd      a0, 0x398(a1)
   13c46: 38a5b823      sd      a0, 0x390(a1)
   13c4a: 08000513      li      a0, 0x80
   13c4e: 38a5b423      sd      a0, 0x388(a1)
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:204
;                 mstore(64, _1)
   13c52: 3885b503      ld      a0, 0x388(a1)
   13c56: 3905b603      ld      a2, 0x390(a1)
   13c5a: 3985b683      ld      a3, 0x398(a1)
   13c5e: 3a05b703      ld      a4, 0x3a0(a1)
   13c62: 38e5b023      sd      a4, 0x380(a1)
   13c66: 36d5bc23      sd      a3, 0x378(a1)
   13c6a: 36c5b823      sd      a2, 0x370(a1)
   13c6e: 36a5b423      sd      a0, 0x368(a1)
   13c72: 04000513      li      a0, 0x40
   13c76: 65d9          lui     a1, 0x16
   13c78: a605859b      addiw   a1, a1, -0x5a0
   13c7c: 95a6          add     a1, a1, s1
   13c7e: 00000097      auipc   ra, 0x0
   13c82: 000080e7      jalr    ra <__runtime+0x1de>

0000000000013c86 <.Lpcrel_hi27>:
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:205
;                 if iszero(lt(calldatasize(), 4))
   13c86: 00000517      auipc   a0, 0x0
   13c8a: 00053503      ld      a0, 0x0(a0)
   13c8e: 4108          lw      a0, 0x0(a0)
   13c90: 4591          li      a1, 0x4
   13c92: 06b56263      bltu    a0, a1, 0x13cf6 <.Lpcrel_hi27+0x70>
   13c96: a009          j       0x13c98 <.Lpcrel_hi27+0x12>
```

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
This commit is contained in:
xermicus
2025-07-04 19:56:52 +02:00
committed by GitHub
parent ed608699af
commit b238913a7d
8 changed files with 69 additions and 9 deletions
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crates/llvm-context/src/polkavm/context/debug_info.rs
+11 -2
View File
@@ -51,11 +51,20 @@ pub struct DebugInfo<'ctx> {
impl<'ctx> DebugInfo<'ctx> {
/// A shortcut constructor.
pub fn new(module: &inkwell::module::Module<'ctx>) -> Self {
pub fn new(
module: &inkwell::module::Module<'ctx>,
debug_config: &crate::debug_config::DebugConfig,
) -> Self {
let module_name = module.get_name().to_string_lossy();
let yul_name = debug_config
.contract_path
.as_ref()
.map(|path| path.display().to_string());
let (builder, compile_unit) = module.create_debug_info_builder(
true,
inkwell::debug_info::DWARFSourceLanguage::C,
module.get_name().to_string_lossy().as_ref(),
yul_name.as_deref().unwrap_or_else(|| module_name.as_ref()),
"",
"",
false,