asan_test.go

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build linux || (freebsd && amd64)
     6  
     7  package sanitizers_test
     8  
     9  import (
    10  	"fmt"
    11  	"internal/platform"
    12  	"internal/testenv"
    13  	"strings"
    14  	"testing"
    15  )
    16  
    17  func TestASAN(t *testing.T) {
    18  	testenv.MustHaveGoBuild(t)
    19  	testenv.MustHaveCGO(t)
    20  	goos, err := goEnv("GOOS")
    21  	if err != nil {
    22  		t.Fatal(err)
    23  	}
    24  	goarch, err := goEnv("GOARCH")
    25  	if err != nil {
    26  		t.Fatal(err)
    27  	}
    28  	// The asan tests require support for the -asan option.
    29  	if !platform.ASanSupported(goos, goarch) {
    30  		t.Skipf("skipping on %s/%s; -asan option is not supported.", goos, goarch)
    31  	}
    32  	// The current implementation is only compatible with the ASan library from version
    33  	// v7 to v9 (See the description in src/runtime/asan/asan.go). Therefore, using the
    34  	// -asan option must use a compatible version of ASan library, which requires that
    35  	// the gcc version is not less than 7 and the clang version is not less than 9,
    36  	// otherwise a segmentation fault will occur.
    37  	if !compilerRequiredAsanVersion(goos, goarch) {
    38  		t.Skipf("skipping on %s/%s: too old version of compiler", goos, goarch)
    39  	}
    40  
    41  	t.Parallel()
    42  	requireOvercommit(t)
    43  	config := configure("address")
    44  	config.skipIfCSanitizerBroken(t)
    45  
    46  	mustRun(t, config.goCmd("build", "std"))
    47  
    48  	cases := []struct {
    49  		src               string
    50  		memoryAccessError string
    51  		errorLocation     string
    52  		experiments       []string
    53  	}{
    54  		{src: "asan1_fail.go", memoryAccessError: "heap-use-after-free", errorLocation: "asan1_fail.go:25"},
    55  		{src: "asan2_fail.go", memoryAccessError: "heap-buffer-overflow", errorLocation: "asan2_fail.go:31"},
    56  		{src: "asan3_fail.go", memoryAccessError: "use-after-poison", errorLocation: "asan3_fail.go:13"},
    57  		{src: "asan4_fail.go", memoryAccessError: "use-after-poison", errorLocation: "asan4_fail.go:13"},
    58  		{src: "asan5_fail.go", memoryAccessError: "use-after-poison", errorLocation: "asan5_fail.go:18"},
    59  		{src: "asan_useAfterReturn.go"},
    60  		{src: "asan_unsafe_fail1.go", memoryAccessError: "use-after-poison", errorLocation: "asan_unsafe_fail1.go:25"},
    61  		{src: "asan_unsafe_fail2.go", memoryAccessError: "use-after-poison", errorLocation: "asan_unsafe_fail2.go:25"},
    62  		{src: "asan_unsafe_fail3.go", memoryAccessError: "use-after-poison", errorLocation: "asan_unsafe_fail3.go:18"},
    63  		{src: "asan_global1_fail.go", memoryAccessError: "global-buffer-overflow", errorLocation: "asan_global1_fail.go:12"},
    64  		{src: "asan_global2_fail.go", memoryAccessError: "global-buffer-overflow", errorLocation: "asan_global2_fail.go:19"},
    65  		{src: "asan_global3_fail.go", memoryAccessError: "global-buffer-overflow", errorLocation: "asan_global3_fail.go:13"},
    66  		{src: "asan_global4_fail.go", memoryAccessError: "global-buffer-overflow", errorLocation: "asan_global4_fail.go:21"},
    67  		{src: "asan_global5.go"},
    68  		{src: "arena_fail.go", memoryAccessError: "use-after-poison", errorLocation: "arena_fail.go:26", experiments: []string{"arenas"}},
    69  	}
    70  	for _, tc := range cases {
    71  		tc := tc
    72  		name := strings.TrimSuffix(tc.src, ".go")
    73  		t.Run(name, func(t *testing.T) {
    74  			t.Parallel()
    75  
    76  			dir := newTempDir(t)
    77  			defer dir.RemoveAll(t)
    78  
    79  			outPath := dir.Join(name)
    80  			mustRun(t, config.goCmdWithExperiments("build", []string{"-o", outPath, srcPath(tc.src)}, tc.experiments))
    81  
    82  			cmd := hangProneCmd(outPath)
    83  			if tc.memoryAccessError != "" {
    84  				outb, err := cmd.CombinedOutput()
    85  				out := string(outb)
    86  				if err != nil && strings.Contains(out, tc.memoryAccessError) {
    87  					// This string is output if the
    88  					// sanitizer library needs a
    89  					// symbolizer program and can't find it.
    90  					const noSymbolizer = "external symbolizer"
    91  					// Check if -asan option can correctly print where the error occurred.
    92  					if tc.errorLocation != "" &&
    93  						!strings.Contains(out, tc.errorLocation) &&
    94  						!strings.Contains(out, noSymbolizer) &&
    95  						compilerSupportsLocation() {
    96  
    97  						t.Errorf("%#q exited without expected location of the error\n%s; got failure\n%s", strings.Join(cmd.Args, " "), tc.errorLocation, out)
    98  					}
    99  					return
   100  				}
   101  				t.Fatalf("%#q exited without expected memory access error\n%s; got failure\n%s", strings.Join(cmd.Args, " "), tc.memoryAccessError, out)
   102  			}
   103  			mustRun(t, cmd)
   104  		})
   105  	}
   106  }
   107  
   108  func TestASANLinkerX(t *testing.T) {
   109  	testenv.MustHaveGoBuild(t)
   110  	testenv.MustHaveCGO(t)
   111  	// Test ASAN with linker's -X flag (see issue 56175).
   112  	goos, err := goEnv("GOOS")
   113  	if err != nil {
   114  		t.Fatal(err)
   115  	}
   116  	goarch, err := goEnv("GOARCH")
   117  	if err != nil {
   118  		t.Fatal(err)
   119  	}
   120  	// The asan tests require support for the -asan option.
   121  	if !platform.ASanSupported(goos, goarch) {
   122  		t.Skipf("skipping on %s/%s; -asan option is not supported.", goos, goarch)
   123  	}
   124  	if !compilerRequiredAsanVersion(goos, goarch) {
   125  		t.Skipf("skipping on %s/%s: too old version of compiler", goos, goarch)
   126  	}
   127  
   128  	t.Parallel()
   129  	requireOvercommit(t)
   130  	config := configure("address")
   131  	config.skipIfCSanitizerBroken(t)
   132  
   133  	dir := newTempDir(t)
   134  	defer dir.RemoveAll(t)
   135  
   136  	var ldflags string
   137  	for i := 1; i <= 10; i++ {
   138  		ldflags += fmt.Sprintf("-X=main.S%d=%d -X=cmd/cgo/internal/testsanitizers/testdata/asan_linkerx/p.S%d=%d ", i, i, i, i)
   139  	}
   140  
   141  	// build the binary
   142  	outPath := dir.Join("main.exe")
   143  	cmd := config.goCmd("build", "-ldflags="+ldflags, "-o", outPath)
   144  	cmd.Dir = srcPath("asan_linkerx")
   145  	mustRun(t, cmd)
   146  
   147  	// run the binary
   148  	mustRun(t, hangProneCmd(outPath))
   149  }
   150
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