diff options
author | Ian Lance Taylor <iant@golang.org> | 2019-01-18 19:04:36 +0000 |
---|---|---|
committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-01-18 19:04:36 +0000 |
commit | 4f4a855d82a889cebcfca150a7a43909bcb6a346 (patch) | |
tree | f12bae0781920fa34669fe30b6f4615a86d9fb80 /libgo/go/runtime/debug | |
parent | 225220d668dafb8262db7012bced688acbe63b33 (diff) | |
download | gcc-4f4a855d82a889cebcfca150a7a43909bcb6a346.zip gcc-4f4a855d82a889cebcfca150a7a43909bcb6a346.tar.gz gcc-4f4a855d82a889cebcfca150a7a43909bcb6a346.tar.bz2 |
libgo: update to Go1.12beta2
Reviewed-on: https://go-review.googlesource.com/c/158019
gotools/:
* Makefile.am (go_cmd_vet_files): Update for Go1.12beta2 release.
(GOTOOLS_TEST_TIMEOUT): Increase to 600.
(check-runtime): Export LD_LIBRARY_PATH before computing GOARCH
and GOOS.
(check-vet): Copy golang.org/x/tools into check-vet-dir.
* Makefile.in: Regenerate.
gcc/testsuite/:
* go.go-torture/execute/names-1.go: Stop using debug/xcoff, which
is no longer externally visible.
From-SVN: r268084
Diffstat (limited to 'libgo/go/runtime/debug')
-rw-r--r-- | libgo/go/runtime/debug/mod.go | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/libgo/go/runtime/debug/mod.go b/libgo/go/runtime/debug/mod.go new file mode 100644 index 0000000..f2948c6 --- /dev/null +++ b/libgo/go/runtime/debug/mod.go @@ -0,0 +1,112 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package debug + +import ( + "strings" + _ "unsafe" // for go:linkname +) + +// set using cmd/go/internal/modload.ModInfoProg +var modinfo string + +// setmodinfo is visible to code generated by cmd/go/internal/modload.ModInfoProg. +//go:linkname setmodinfo runtime..z2fdebug.setmodinfo +func setmodinfo(s string) { + modinfo = s +} + +// ReadBuildInfo returns the build information embedded +// in the running binary. The information is available only +// in binaries built with module support. +func ReadBuildInfo() (info *BuildInfo, ok bool) { + return readBuildInfo(modinfo) +} + +// BuildInfo represents the build information read from +// the running binary. +type BuildInfo struct { + Path string // The main package path + Main Module // The main module information + Deps []*Module // Module dependencies +} + +// Module represents a module. +type Module struct { + Path string // module path + Version string // module version + Sum string // checksum + Replace *Module // replaced by this module +} + +func readBuildInfo(data string) (*BuildInfo, bool) { + if len(data) < 32 { + return nil, false + } + data = data[16 : len(data)-16] + + const ( + pathLine = "path\t" + modLine = "mod\t" + depLine = "dep\t" + repLine = "=>\t" + ) + + info := &BuildInfo{} + + var line string + // Reverse of cmd/go/internal/modload.PackageBuildInfo + for len(data) > 0 { + i := strings.IndexByte(data, '\n') + if i < 0 { + break + } + line, data = data[:i], data[i+1:] + switch { + case strings.HasPrefix(line, pathLine): + elem := line[len(pathLine):] + info.Path = elem + case strings.HasPrefix(line, modLine): + elem := strings.Split(line[len(modLine):], "\t") + if len(elem) != 3 { + return nil, false + } + info.Main = Module{ + Path: elem[0], + Version: elem[1], + Sum: elem[2], + } + case strings.HasPrefix(line, depLine): + elem := strings.Split(line[len(depLine):], "\t") + if len(elem) != 2 && len(elem) != 3 { + return nil, false + } + sum := "" + if len(elem) == 3 { + sum = elem[2] + } + info.Deps = append(info.Deps, &Module{ + Path: elem[0], + Version: elem[1], + Sum: sum, + }) + case strings.HasPrefix(line, repLine): + elem := strings.Split(line[len(repLine):], "\t") + if len(elem) != 3 { + return nil, false + } + last := len(info.Deps) - 1 + if last < 0 { + return nil, false + } + info.Deps[last].Replace = &Module{ + Path: elem[0], + Version: elem[1], + Sum: elem[2], + } + } + } + return info, true +} |