e78e04ce39
DWARF generation uses variable source positions (file/line/col) as a way to uniquely identify locals and parameters, as part of the process of matching up post-optimization variables with the corresponding pre-optimization versions (since the DWARF needs to be in terms of the original source constructs). This strategy can run into problems when compiling obfuscated or machine-generated code, where you can in some circumstances wind up with two local variables that appear to have the same name, file, line, and column. This patch changes DWARF generation to skip over such duplicates as opposed to issuing a fatal error (if an obfuscation tool is in use, it is unlikely that a human being will be able to make much sense of DWARF info in any case). Fixes #44378. Change-Id: I198022d184701aa9ec3dce42c005d29b72d2e321 Reviewed-on: https://go-review.googlesource.com/c/go/+/294289 TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Jeremy Faller <jeremy@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Trust: Than McIntosh <thanm@google.com> Run-TryBot: Than McIntosh <thanm@google.com> |
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The Go Programming Language
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