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cmd/link: include DW_AT_producer in .debug_info

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This can make life easier for Delve (and other debuggers),
and can help them with bug reports.

Sample producer field (from objdump):
<48> DW_AT_producer : Go cmd/compile devel +8a59dbf41a Mon May 8 16:02:44 2017 -0400

Change-Id: I0605843c959b53a60a25a3b870aa8755bf5d5b13
Reviewed-on: https://go-review.googlesource.com/33588
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Chase 2017-05-08 14:37:02 -04:00
parent 9bced47706
commit 41d0bbdc16
2 changed files with 3 additions and 0 deletions
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1
src/cmd/internal/dwarf/dwarf.go
View File

@ -197,6 +197,7 @@ var abbrevs = [DW_NABRV]dwAbbrev{
{DW_AT_high_pc, DW_FORM_addr},
{DW_AT_stmt_list, DW_FORM_data4},
{DW_AT_comp_dir, DW_FORM_string},
{DW_AT_producer, DW_FORM_string},
},
},

2
src/cmd/link/internal/ld/dwarf.go
View File

@ -1024,6 +1024,8 @@ func writelines(ctxt *Link, syms []*Symbol) ([]*Symbol, []*Symbol) {
// OS X linker requires compilation dir or absolute path in comp unit name to output debug info.
compDir := getCompilationDir()
newattr(dwinfo, dwarf.DW_AT_comp_dir, dwarf.DW_CLS_STRING, int64(len(compDir)), compDir)
producer := "Go cmd/compile " + objabi.Version
newattr(dwinfo, dwarf.DW_AT_producer, dwarf.DW_CLS_STRING, int64(len(producer)), producer)
// Write .debug_line Line Number Program Header (sec 6.2.4)
// Fields marked with (*) must be changed for 64-bit dwarf