7a9389330e
gcc/: * gcc.c (default_compilers): Add entry for ".go". * common.opt: Add -static-libgo as a driver option. * doc/install.texi (Configuration): Mention libgo as an option for --enable-shared. Mention go as an option for --enable-languages. * doc/invoke.texi (Overall Options): Mention .go as a file name suffix. Mention go as a -x option. * doc/frontends.texi (G++ and GCC): Mention Go as a supported language. * doc/sourcebuild.texi (Top Level): Mention libgo. * doc/standards.texi (Standards): Add section on Go language. Move references for other languages into their own section. * doc/contrib.texi (Contributors): Mention that I contributed the Go frontend. gcc/testsuite/: * lib/go.exp: New file. * lib/go-dg.exp: New file. * lib/go-torture.exp: New file. * lib/target-supports.exp (check_compile): Match // Go. From-SVN: r167407
208 lines
5.2 KiB
Go
208 lines
5.2 KiB
Go
// Copyright 2009 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 gosym
|
|
|
|
import (
|
|
"debug/elf"
|
|
"os"
|
|
"testing"
|
|
"syscall"
|
|
)
|
|
|
|
func dotest() bool {
|
|
// For now, only works on ELF platforms.
|
|
return syscall.OS == "linux" && os.Getenv("GOARCH") == "amd64"
|
|
}
|
|
|
|
func getTable(t *testing.T) *Table {
|
|
f, tab := crack(os.Args[0], t)
|
|
f.Close()
|
|
return tab
|
|
}
|
|
|
|
func crack(file string, t *testing.T) (*elf.File, *Table) {
|
|
// Open self
|
|
f, err := elf.Open(file)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return parse(file, f, t)
|
|
}
|
|
|
|
func parse(file string, f *elf.File, t *testing.T) (*elf.File, *Table) {
|
|
symdat, err := f.Section(".gosymtab").Data()
|
|
if err != nil {
|
|
f.Close()
|
|
t.Fatalf("reading %s gosymtab: %v", file, err)
|
|
}
|
|
pclndat, err := f.Section(".gopclntab").Data()
|
|
if err != nil {
|
|
f.Close()
|
|
t.Fatalf("reading %s gopclntab: %v", file, err)
|
|
}
|
|
|
|
pcln := NewLineTable(pclndat, f.Section(".text").Addr)
|
|
tab, err := NewTable(symdat, pcln)
|
|
if err != nil {
|
|
f.Close()
|
|
t.Fatalf("parsing %s gosymtab: %v", file, err)
|
|
}
|
|
|
|
return f, tab
|
|
}
|
|
|
|
var goarch = os.Getenv("O")
|
|
|
|
func TestLineFromAline(t *testing.T) {
|
|
if !dotest() {
|
|
return
|
|
}
|
|
|
|
tab := getTable(t)
|
|
|
|
// Find the sym package
|
|
pkg := tab.LookupFunc("debug/gosym.TestLineFromAline").Obj
|
|
if pkg == nil {
|
|
t.Fatalf("nil pkg")
|
|
}
|
|
|
|
// Walk every absolute line and ensure that we hit every
|
|
// source line monotonically
|
|
lastline := make(map[string]int)
|
|
final := -1
|
|
for i := 0; i < 10000; i++ {
|
|
path, line := pkg.lineFromAline(i)
|
|
// Check for end of object
|
|
if path == "" {
|
|
if final == -1 {
|
|
final = i - 1
|
|
}
|
|
continue
|
|
} else if final != -1 {
|
|
t.Fatalf("reached end of package at absolute line %d, but absolute line %d mapped to %s:%d", final, i, path, line)
|
|
}
|
|
// It's okay to see files multiple times (e.g., sys.a)
|
|
if line == 1 {
|
|
lastline[path] = 1
|
|
continue
|
|
}
|
|
// Check that the is the next line in path
|
|
ll, ok := lastline[path]
|
|
if !ok {
|
|
t.Errorf("file %s starts on line %d", path, line)
|
|
} else if line != ll+1 {
|
|
t.Errorf("expected next line of file %s to be %d, got %d", path, ll+1, line)
|
|
}
|
|
lastline[path] = line
|
|
}
|
|
if final == -1 {
|
|
t.Errorf("never reached end of object")
|
|
}
|
|
}
|
|
|
|
func TestLineAline(t *testing.T) {
|
|
if !dotest() {
|
|
return
|
|
}
|
|
|
|
tab := getTable(t)
|
|
|
|
for _, o := range tab.Files {
|
|
// A source file can appear multiple times in a
|
|
// object. alineFromLine will always return alines in
|
|
// the first file, so track which lines we've seen.
|
|
found := make(map[string]int)
|
|
for i := 0; i < 1000; i++ {
|
|
path, line := o.lineFromAline(i)
|
|
if path == "" {
|
|
break
|
|
}
|
|
|
|
// cgo files are full of 'Z' symbols, which we don't handle
|
|
if len(path) > 4 && path[len(path)-4:] == ".cgo" {
|
|
continue
|
|
}
|
|
|
|
if minline, ok := found[path]; path != "" && ok {
|
|
if minline >= line {
|
|
// We've already covered this file
|
|
continue
|
|
}
|
|
}
|
|
found[path] = line
|
|
|
|
a, err := o.alineFromLine(path, line)
|
|
if err != nil {
|
|
t.Errorf("absolute line %d in object %s maps to %s:%d, but mapping that back gives error %s", i, o.Paths[0].Name, path, line, err)
|
|
} else if a != i {
|
|
t.Errorf("absolute line %d in object %s maps to %s:%d, which maps back to absolute line %d\n", i, o.Paths[0].Name, path, line, a)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// gotest: if [ "$(uname)-$(uname -m)" = Linux-x86_64 -a "$GOARCH" = amd64 ]; then
|
|
// gotest: mkdir -p _test && $AS pclinetest.s && $LD -E main -o _test/pclinetest pclinetest.$O
|
|
// gotest: fi
|
|
func TestPCLine(t *testing.T) {
|
|
if !dotest() {
|
|
return
|
|
}
|
|
|
|
f, tab := crack("_test/pclinetest", t)
|
|
text := f.Section(".text")
|
|
textdat, err := text.Data()
|
|
if err != nil {
|
|
t.Fatalf("reading .text: %v", err)
|
|
}
|
|
|
|
// Test PCToLine
|
|
sym := tab.LookupFunc("linefrompc")
|
|
wantLine := 0
|
|
for pc := sym.Entry; pc < sym.End; pc++ {
|
|
file, line, fn := tab.PCToLine(pc)
|
|
off := pc - text.Addr // TODO(rsc): should not need off; bug in 8g
|
|
wantLine += int(textdat[off])
|
|
if fn == nil {
|
|
t.Errorf("failed to get line of PC %#x", pc)
|
|
} else if len(file) < 12 || file[len(file)-12:] != "pclinetest.s" || line != wantLine || fn != sym {
|
|
t.Errorf("expected %s:%d (%s) at PC %#x, got %s:%d (%s)", "pclinetest.s", wantLine, sym.Name, pc, file, line, fn.Name)
|
|
}
|
|
}
|
|
|
|
// Test LineToPC
|
|
sym = tab.LookupFunc("pcfromline")
|
|
lookupline := -1
|
|
wantLine = 0
|
|
off := uint64(0) // TODO(rsc): should not need off; bug in 8g
|
|
for pc := sym.Value; pc < sym.End; pc += 2 + uint64(textdat[off]) {
|
|
file, line, fn := tab.PCToLine(pc)
|
|
off = pc - text.Addr
|
|
wantLine += int(textdat[off])
|
|
if line != wantLine {
|
|
t.Errorf("expected line %d at PC %#x in pcfromline, got %d", wantLine, pc, line)
|
|
off = pc + 1 - text.Addr
|
|
continue
|
|
}
|
|
if lookupline == -1 {
|
|
lookupline = line
|
|
}
|
|
for ; lookupline <= line; lookupline++ {
|
|
pc2, fn2, err := tab.LineToPC(file, lookupline)
|
|
if lookupline != line {
|
|
// Should be nothing on this line
|
|
if err == nil {
|
|
t.Errorf("expected no PC at line %d, got %#x (%s)", lookupline, pc2, fn2.Name)
|
|
}
|
|
} else if err != nil {
|
|
t.Errorf("failed to get PC of line %d: %s", lookupline, err)
|
|
} else if pc != pc2 {
|
|
t.Errorf("expected PC %#x (%s) at line %d, got PC %#x (%s)", pc, fn.Name, line, pc2, fn2.Name)
|
|
}
|
|
}
|
|
off = pc + 1 - text.Addr
|
|
}
|
|
}
|