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compiler,linker: support for DWARF inlined instances

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Compiler and linker changes to support DWARF inlined instances,
see https://go.googlesource.com/proposal/+/HEAD/design/22080-dwarf-inlining.md
for design details.

This functionality is gated via the cmd/compile option -gendwarfinl=N,
where N={0,1,2}, where a value of 0 disables dwarf inline generation,
a value of 1 turns on dwarf generation without tracking of formal/local
vars from inlined routines, and a value of 2 enables inlines with
variable tracking.

Updates #22080

Change-Id: I69309b3b815d9fed04aebddc0b8d33d0dbbfad6e
Reviewed-on: https://go-review.googlesource.com/75550
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Than McIntosh 2017-10-06 11:32:28 -04:00
parent dbb1d198ab
commit 4435fcfd6c
17 changed files with 1950 additions and 152 deletions
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5
src/cmd/compile/internal/gc/go.go
View file

@ -219,6 +219,11 @@ var instrumenting bool
// Whether we are tracking lexical scopes for DWARF.
var trackScopes bool
// Controls generation of DWARF inlined instance records. Zero
// disables, 1 emits inlined routines but suppresses var info,
// and 2 emits inlined routines with tracking of formals/locals.
var genDwarfInline int
var debuglive int
var Ctxt *obj.Link