767e7680ec
This patch rolls out the necessary changes to migrate the DWARF line table support in the compiler and linker to DWARF version 5, gated by the "dwarf5" GOEXPERIMENT. DWARF version 5 includes a number of changes to the line table, notably a revamped prolog section and a change in the indexing system used to refer to files and directories within the line table program. Specifically, prior to DWARF 4 a compilation's directory table was considered to have an implicit zero entry containing the compilation directory of the translation unit (package), and the file table was considered to have an implicit zero entry storing the "primary source file" (stored in the compilation unit DIE name). DWARF 5 does away with these implicity entries meaning that files and dirs are now effectively a 0-based index. Updates #26379. Change-Id: I9b4f1be5415aacec1ba57366d60bd48819c56ea5 Reviewed-on: https://go-review.googlesource.com/c/go/+/633879 Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com> Reviewed-by: David Chase <drchase@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cherry Mui <cherryyz@google.com> |
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The Go Programming Language
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