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cmd/internal/obj: avoid duplicate file name symbols

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The meaning of Version=1 was overloaded: it was reserved for file name
symbols (to avoid conflicts with non-file name symbols), but was also
used to mean "give me a fresh version number for this symbol."

With the new inlining tree, the same file name symbol can appear in
multiple entries, but each one would become a distinct symbol with its
own version number.

Now, we avoid duplicating symbols by using Version=0 for file name
symbols and we avoid conflicts with other symbols by prefixing the
symbol name with "gofile..".

Change-Id: I8d0374053b8cdb6a9ca7fb71871b69b4dd369a9c
Reviewed-on: https://go-review.googlesource.com/37234
Run-TryBot: David Lazar <lazard@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
David Lazar 2017-02-17 16:20:52 -05:00
parent 781fd3998e
commit 301149b9e4
5 changed files with 8 additions and 11 deletions
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6
src/cmd/internal/obj/link.go
View file

@ -708,12 +708,6 @@ type Pcdata struct {
P []byte
}
// symbol version, incremented each time a file is loaded.
// version==1 is reserved for savehist.
const (
HistVersion = 1
)
// Link holds the context for writing object code from a compiler
// to be linker input or for reading that input into the linker.
type Link struct {