From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgo/go/debug/gosym/pclntab_test.go | 207 +++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 libgo/go/debug/gosym/pclntab_test.go (limited to 'libgo/go/debug/gosym/pclntab_test.go') diff --git a/libgo/go/debug/gosym/pclntab_test.go b/libgo/go/debug/gosym/pclntab_test.go new file mode 100644 index 000000000..908702173 --- /dev/null +++ b/libgo/go/debug/gosym/pclntab_test.go @@ -0,0 +1,207 @@ +// 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 + } +} -- cgit v1.2.3