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debug/dwarf: better error message when reading absent debug_line_str

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When a DW_FORM_line_strp is used without a debug_line_str section a
good error message (about the missing section) is generated but
immediately overwritten by the underflow error generated by trying to
read the non-existent section.

Updates #49590

Change-Id: I1c431392123a86c78c95ef1f185ebd6f17f2476a
Reviewed-on: https://go-review.googlesource.com/c/go/+/363894
Run-TryBot: Alessandro Arzilli <alessandro.arzilli@gmail.com>
Trust: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Alessandro Arzilli 2021-11-15 09:42:28 +01:00 committed by Ian Lance Taylor
parent d15610128e
commit 9e13a8876f
1 changed files with 1 additions and 0 deletions
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1
src/debug/dwarf/entry.go
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@ -641,6 +641,7 @@ func (b *buf) entry(cu *Entry, atab abbrevTable, ubase Offset, vers int) *Entry
} else {
if len(b.dwarf.lineStr) == 0 {
b.error("DW_FORM_line_strp with no .debug_line_str section")
return nil
}
b1 = makeBuf(b.dwarf, b.format, "line_str", 0, b.dwarf.lineStr)
}