gimli-rs / gimli / 9222243958

89%

Build Type

push

github

Committed by web-flow

Commit Message

read: Skip invalid ranges in RngListIter/LocListIter (#715)

I've encountered a toolchain which produces invalid ranges, where the
end of the range is before the beginning.

I want to fix that toolchain, of course, but I also noticed that tools
like `llvm-addr2line` and `llvm-dwarfdump --lookup` apparently silently
skip the invalid ranges, so they're able to give partial answers. By
contrast, `gimli` returns an error in this case. Then the `addr2line`
crate, for example, bubbles the error all the way out and doesn't return
any results.

The specific toolchain where I've encountered this is TinyGo (which uses
LLVM), when building WebAssembly with the `wasip1` target. I tested
TinyGo 0.32.0-dev and LLVM 17, and this was the shortest program I could
find which produces invalid ranges:
tinygo build -target=wasip1 /tmp/test.go
```go
package main
import "os"
func main() {
        os.Lstat("some-filename")
}
```

Run Details

2 of 2 new or added lines in 2 files covered. (100.0%)

14 existing lines in 1 file now uncovered.

6414 of 11084 relevant lines covered (57.87%)

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