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cmd/link, plugin: use full plugin path for symbols

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Plumb the import path of a plugin package through to the linker, and
use it as the prefix on the exported symbol names.

Before this we used the basename of the plugin file as the prefix,
which could conflict and result in multiple loaded plugins sharing
symbols that are distinct.

Fixes #17155
Fixes #17579

Change-Id: I7ce966ca82d04e8507c0bcb8ea4ad946809b1ef5
Reviewed-on: https://go-review.googlesource.com/32355
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Crawshaw 2016-10-30 15:31:21 -04:00
parent 590fce4884
commit 9da7058466
12 changed files with 119 additions and 40 deletions
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5
src/cmd/link/internal/ld/main.go
View file

@ -37,7 +37,6 @@ import (
"flag"
"log"
"os"
"path/filepath"
"runtime"
"runtime/pprof"
"strings"
@ -59,6 +58,7 @@ var (
flagBuildid = flag.String("buildid", "", "record `id` as Go toolchain build id")
flagOutfile = flag.String("o", "", "write output to `file`")
flagPluginPath = flag.String("pluginpath", "", "full path name for plugin")
FlagLinkshared = flag.Bool("linkshared", false, "link against installed Go shared libraries")
flagInstallSuffix = flag.String("installsuffix", "", "set package directory `suffix`")
@ -175,8 +175,7 @@ func Main() {
addlibpath(ctxt, "command line", "command line", file, pkgpath, "")
}
case BuildmodePlugin:
pluginName := strings.TrimSuffix(filepath.Base(flag.Arg(0)), ".a")
addlibpath(ctxt, "command line", "command line", flag.Arg(0), pluginName, "")
addlibpath(ctxt, "command line", "command line", flag.Arg(0), *flagPluginPath, "")
default:
addlibpath(ctxt, "command line", "command line", flag.Arg(0), "main", "")
}