util/all_tests.go - boringssl - Git at Google

 // Copyright (c) 2015, Google Inc.
 //
 // Permission to use, copy, modify, and/or distribute this software for any
 // purpose with or without fee is hereby granted, provided that the above
 // copyright notice and this permission notice appear in all copies.
 //
 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 //go:build ignore

 package main

 import (
 	"bytes"
 	"errors"
 	"flag"
 	"fmt"
 	"os"
 	"os/exec"
 	"path"
 	"runtime"
 	"strconv"
 	"strings"
 	"sync"
 	"syscall"

 	"boringssl.googlesource.com/boringssl/util/testconfig"
 	"boringssl.googlesource.com/boringssl/util/testresult"
 )

 // TODO(davidben): Link tests with the malloc shim and port -malloc-test to this runner.

 var (
 	useValgrind     = flag.Bool("valgrind", false, "If true, run code under valgrind")
 	useCallgrind    = flag.Bool("callgrind", false, "If true, run code under valgrind to generate callgrind traces.")
 	useGDB          = flag.Bool("gdb", false, "If true, run BoringSSL code under gdb")
 	useSDE          = flag.Bool("sde", false, "If true, run BoringSSL code under Intel's SDE for each supported chip")
 	sdePath         = flag.String("sde-path", "sde", "The path to find the sde binary.")
 	buildDir        = flag.String("build-dir", "build", "The build directory to run the tests from.")
 	numWorkers      = flag.Int("num-workers", runtime.NumCPU(), "Runs the given number of workers when testing.")
 	jsonOutput      = flag.String("json-output", "", "The file to output JSON results to.")
 	mallocTest      = flag.Int64("malloc-test", -1, "If non-negative, run each test with each malloc in turn failing from the given number onwards.")
 	mallocTestDebug = flag.Bool("malloc-test-debug", false, "If true, ask each test to abort rather than fail a malloc. This can be used with a specific value for --malloc-test to identity the malloc failing that is causing problems.")
 	simulateARMCPUs = flag.Bool("simulate-arm-cpus", simulateARMCPUsDefault(), "If true, runs tests simulating different ARM CPUs.")
 )

 func simulateARMCPUsDefault() bool {
 	return (runtime.GOOS == "linux" || runtime.GOOS == "android") && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64")
 }

 type test struct {
 	testconfig.Test

 	shard, numShards int
 	// cpu, if not empty, contains a code to simulate. For SDE, run `sde64
 	// -help` to get a list of these codes. For ARM, see gtest_main.cc for
 	// the supported values.
 	cpu string
 }

 type result struct {
 	Test   test
 	Passed bool
 	Error  error
 }

 // sdeCPUs contains a list of CPU code that we run all tests under when *useSDE
 // is true.
 var sdeCPUs = []string{
 	"p4p", // Pentium4 Prescott
 	"mrm", // Merom
 	"pnr", // Penryn
 	"nhm", // Nehalem
 	"wsm", // Westmere
 	"snb", // Sandy Bridge
 	"ivb", // Ivy Bridge
 	"hsw", // Haswell
 	"bdw", // Broadwell
 	"slt", // Saltwell
 	"slm", // Silvermont
 	"glm", // Goldmont
 	"glp", // Goldmont Plus
 	"tnt", // Tremont
 	"skl", // Skylake
 	"cnl", // Cannon Lake
 	"icl", // Ice Lake
 	"skx", // Skylake server
 	"clx", // Cascade Lake
 	"cpx", // Cooper Lake
 	"icx", // Ice Lake server
 	"knl", // Knights landing
 	"knm", // Knights mill
 	"tgl", // Tiger Lake
 }

 var armCPUs = []string{
 	"none",   // No support for any ARM extensions.
 	"neon",   // Support for NEON.
 	"crypto", // Support for NEON and crypto extensions.
 }

 func valgrindOf(dbAttach bool, path string, args ...string) *exec.Cmd {
 	valgrindArgs := []string{"--error-exitcode=99", "--track-origins=yes", "--leak-check=full", "--quiet"}
 	if dbAttach {
 		valgrindArgs = append(valgrindArgs, "--db-attach=yes", "--db-command=xterm -e gdb -nw %f %p")
 	}
 	valgrindArgs = append(valgrindArgs, path)
 	valgrindArgs = append(valgrindArgs, args...)

 	return exec.Command("valgrind", valgrindArgs...)
 }

 func callgrindOf(path string, args ...string) *exec.Cmd {
 	valgrindArgs := []string{"-q", "--tool=callgrind", "--dump-instr=yes", "--collect-jumps=yes", "--callgrind-out-file=" + *buildDir + "/callgrind/callgrind.out.%p"}
 	valgrindArgs = append(valgrindArgs, path)
 	valgrindArgs = append(valgrindArgs, args...)

 	return exec.Command("valgrind", valgrindArgs...)
 }

 func gdbOf(path string, args ...string) *exec.Cmd {
 	xtermArgs := []string{"-e", "gdb", "--args"}
 	xtermArgs = append(xtermArgs, path)
 	xtermArgs = append(xtermArgs, args...)

 	return exec.Command("xterm", xtermArgs...)
 }

 func sdeOf(cpu, path string, args ...string) *exec.Cmd {
 	sdeArgs := []string{"-" + cpu}
 	// The kernel's vdso code for gettimeofday sometimes uses the RDTSCP
 	// instruction. Although SDE has a -chip_check_vsyscall flag that
 	// excludes such code by default, it does not seem to work. Instead,
 	// pass the -chip_check_exe_only flag which retains test coverage when
 	// statically linked and excludes the vdso.
 	if cpu == "p4p" || cpu == "pnr" || cpu == "mrm" || cpu == "slt" {
 		sdeArgs = append(sdeArgs, "-chip_check_exe_only")
 	}
 	sdeArgs = append(sdeArgs, "--", path)
 	sdeArgs = append(sdeArgs, args...)
 	return exec.Command(*sdePath, sdeArgs...)
 }

 var (
 	errMoreMallocs = errors.New("child process did not exhaust all allocation calls")
 	errTestSkipped = errors.New("test was skipped")
 )

 func runTestOnce(test test, mallocNumToFail int64) (passed bool, err error) {
 	prog := path.Join(*buildDir, test.Cmd[0])
 	args := append([]string{}, test.Cmd[1:]...)
 	if *simulateARMCPUs && test.cpu != "" {
 		args = append(args, "--cpu="+test.cpu)
 	}
 	if *useSDE {
 		// SDE is neither compatible with the unwind tester nor automatically
 		// detected.
 		args = append(args, "--no_unwind_tests")
 	}
 	var cmd *exec.Cmd
 	if *useValgrind {
 		cmd = valgrindOf(false, prog, args...)
 	} else if *useCallgrind {
 		cmd = callgrindOf(prog, args...)
 	} else if *useGDB {
 		cmd = gdbOf(prog, args...)
 	} else if *useSDE {
 		cmd = sdeOf(test.cpu, prog, args...)
 	} else {
 		cmd = exec.Command(prog, args...)
 	}
 	if test.Env != nil || test.numShards != 0 {
 		cmd.Env = make([]string, len(os.Environ()))
 		copy(cmd.Env, os.Environ())
 	}
 	if test.Env != nil {
 		cmd.Env = append(cmd.Env, test.Env...)
 	}
 	if test.numShards != 0 {
 		cmd.Env = append(cmd.Env, fmt.Sprintf("GTEST_SHARD_INDEX=%d", test.shard))
 		cmd.Env = append(cmd.Env, fmt.Sprintf("GTEST_TOTAL_SHARDS=%d", test.numShards))
 	}
 	var outBuf bytes.Buffer
 	cmd.Stdout = &outBuf
 	cmd.Stderr = &outBuf
 	if mallocNumToFail >= 0 {
 		cmd.Env = os.Environ()
 		cmd.Env = append(cmd.Env, "MALLOC_NUMBER_TO_FAIL="+strconv.FormatInt(mallocNumToFail, 10))
 		if *mallocTestDebug {
 			cmd.Env = append(cmd.Env, "MALLOC_ABORT_ON_FAIL=1")
 		}
 		cmd.Env = append(cmd.Env, "_MALLOC_CHECK=1")
 	}

 	if err := cmd.Start(); err != nil {
 		return false, err
 	}
 	if err := cmd.Wait(); err != nil {
 		if exitError, ok := err.(*exec.ExitError); ok {
 			switch exitError.Sys().(syscall.WaitStatus).ExitStatus() {
 			case 88:
 				return false, errMoreMallocs
 			case 89:
 				fmt.Print(string(outBuf.Bytes()))
 				return false, errTestSkipped
 			}
 		}
 		fmt.Print(string(outBuf.Bytes()))
 		return false, err
 	}

 	// Account for Windows line-endings.
 	stdout := bytes.Replace(outBuf.Bytes(), []byte("\r\n"), []byte("\n"), -1)

 	if bytes.HasSuffix(stdout, []byte("PASS\n")) &&
 		(len(stdout) == 5 || stdout[len(stdout)-6] == '\n') {
 		return true, nil
 	}

 	// Also accept a googletest-style pass line. This is left here in
 	// transition until the tests are all converted and this script made
 	// unnecessary.
 	if bytes.Contains(stdout, []byte("\n[  PASSED  ]")) {
 		return true, nil
 	}

 	fmt.Print(string(outBuf.Bytes()))
 	return false, nil
 }

 func runTest(test test) (bool, error) {
 	if *mallocTest < 0 {
 		return runTestOnce(test, -1)
 	}

 	for mallocNumToFail := int64(*mallocTest); ; mallocNumToFail++ {
 		if passed, err := runTestOnce(test, mallocNumToFail); err != errMoreMallocs {
 			if err != nil {
 				err = fmt.Errorf("at malloc %d: %s", mallocNumToFail, err)
 			}
 			return passed, err
 		}
 	}
 }

 // setWorkingDirectory walks up directories as needed until the current working
 // directory is the top of a BoringSSL checkout.
 func setWorkingDirectory() {
 	for i := 0; i < 64; i++ {
 		if _, err := os.Stat("BUILDING.md"); err == nil {
 			return
 		}
 		os.Chdir("..")
 	}

 	panic("Couldn't find BUILDING.md in a parent directory!")
 }

 func worker(tests <-chan test, results chan<- result, done *sync.WaitGroup) {
 	defer done.Done()
 	for test := range tests {
 		passed, err := runTest(test)
 		results <- result{test, passed, err}
 	}
 }

 func (t test) shortName() string {
 	return strings.Join(t.Cmd, " ") + t.shardMsg() + t.cpuMsg() + t.envMsg()
 }

 func SpaceIf(returnSpace bool) string {
 	if !returnSpace {
 		return ""
 	}
 	return " "
 }

 func (t test) longName() string {
 	return strings.Join(t.Env, " ") + SpaceIf(len(t.Env) != 0) + strings.Join(t.Cmd, " ") + t.shardMsg() + t.cpuMsg()
 }

 func (t test) shardMsg() string {
 	if t.numShards == 0 {
 		return ""
 	}

 	return fmt.Sprintf(" [shard %d/%d]", t.shard+1, t.numShards)
 }

 func (t test) cpuMsg() string {
 	if len(t.cpu) == 0 {
 		return ""
 	}

 	return fmt.Sprintf(" (for CPU %q)", t.cpu)
 }

 func (t test) envMsg() string {
 	if len(t.Env) == 0 {
 		return ""
 	}

 	return " (custom environment)"
 }

 func (t test) getGTestShards() ([]test, error) {
 	if *numWorkers == 1 || !t.Shard {
 		return []test{t}, nil
 	}

 	shards := make([]test, *numWorkers)
 	for i := range shards {
 		shards[i] = t
 		shards[i].shard = i
 		shards[i].numShards = *numWorkers
 	}

 	return shards, nil
 }

 func main() {
 	flag.Parse()
 	setWorkingDirectory()

 	testCases, err := testconfig.ParseTestConfig("util/all_tests.json")
 	if err != nil {
 		fmt.Printf("Failed to parse input: %s\n", err)
 		os.Exit(1)
 	}

 	var wg sync.WaitGroup
 	tests := make(chan test, *numWorkers)
 	results := make(chan result, *numWorkers)

 	for i := 0; i < *numWorkers; i++ {
 		wg.Add(1)
 		go worker(tests, results, &wg)
 	}

 	go func() {
 		for _, baseTest := range testCases {
 			test := test{Test: baseTest}
 			if *useSDE {
 				if test.SkipSDE {
 					continue
 				}
 				// SDE generates plenty of tasks and gets slower
 				// with additional sharding.
 				for _, cpu := range sdeCPUs {
 					testForCPU := test
 					testForCPU.cpu = cpu
 					tests <- testForCPU
 				}
 			} else if *simulateARMCPUs {
 				// This mode is run instead of the default path,
 				// so also include the native flow.
 				tests <- test
 				for _, cpu := range armCPUs {
 					testForCPU := test
 					testForCPU.cpu = cpu
 					tests <- testForCPU
 				}
 			} else {
 				shards, err := test.getGTestShards()
 				if err != nil {
 					fmt.Printf("Error listing tests: %s\n", err)
 					os.Exit(1)
 				}
 				for _, shard := range shards {
 					tests <- shard
 				}
 			}
 		}
 		close(tests)

 		wg.Wait()
 		close(results)
 	}()

 	testOutput := testresult.NewResults()
 	var failed, skipped []test
 	for testResult := range results {
 		test := testResult.Test
 		args := test.Cmd

 		if testResult.Error == errTestSkipped {
 			fmt.Printf("%s\n", test.longName())
 			fmt.Printf("%s was skipped\n", args[0])
 			skipped = append(skipped, test)
 			testOutput.AddSkip(test.longName())
 		} else if testResult.Error != nil {
 			fmt.Printf("%s\n", test.longName())
 			fmt.Printf("%s failed to complete: %s\n", args[0], testResult.Error)
 			failed = append(failed, test)
 			testOutput.AddResult(test.longName(), "CRASH")
 		} else if !testResult.Passed {
 			fmt.Printf("%s\n", test.longName())
 			fmt.Printf("%s failed to print PASS on the last line.\n", args[0])
 			failed = append(failed, test)
 			testOutput.AddResult(test.longName(), "FAIL")
 		} else {
 			fmt.Printf("%s\n", test.shortName())
 			testOutput.AddResult(test.longName(), "PASS")
 		}
 	}

 	if *jsonOutput != "" {
 		if err := testOutput.WriteToFile(*jsonOutput); err != nil {
 			fmt.Fprintf(os.Stderr, "Error: %s\n", err)
 		}
 	}

 	if len(skipped) > 0 {
 		fmt.Printf("\n%d of %d tests were skipped:\n", len(skipped), len(testCases))
 		for _, test := range skipped {
 			fmt.Printf("\t%s\n", test.shortName())
 		}
 	}

 	if len(failed) > 0 {
 		fmt.Printf("\n%d of %d tests failed:\n", len(failed), len(testCases))
 		for _, test := range failed {
 			fmt.Printf("\t%s\n", test.shortName())
 		}
 		os.Exit(1)
 	}

 	fmt.Printf("All unit tests passed!\n")
 }
	// Copyright (c) 2015, Google Inc.
	//
	// Permission to use, copy, modify, and/or distribute this software for any
	// purpose with or without fee is hereby granted, provided that the above
	// copyright notice and this permission notice appear in all copies.
	//
	// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

	//go:build ignore

	package main

	import (
	"bytes"
	"errors"
	"flag"
	"fmt"
	"os"
	"os/exec"
	"path"
	"runtime"
	"strconv"
	"strings"
	"sync"
	"syscall"

	"boringssl.googlesource.com/boringssl/util/testconfig"
	"boringssl.googlesource.com/boringssl/util/testresult"
	)

	// TODO(davidben): Link tests with the malloc shim and port -malloc-test to this runner.

	var (
	useValgrind = flag.Bool("valgrind", false, "If true, run code under valgrind")
	useCallgrind = flag.Bool("callgrind", false, "If true, run code under valgrind to generate callgrind traces.")
	useGDB = flag.Bool("gdb", false, "If true, run BoringSSL code under gdb")
	useSDE = flag.Bool("sde", false, "If true, run BoringSSL code under Intel's SDE for each supported chip")
	sdePath = flag.String("sde-path", "sde", "The path to find the sde binary.")
	buildDir = flag.String("build-dir", "build", "The build directory to run the tests from.")
	numWorkers = flag.Int("num-workers", runtime.NumCPU(), "Runs the given number of workers when testing.")
	jsonOutput = flag.String("json-output", "", "The file to output JSON results to.")
	mallocTest = flag.Int64("malloc-test", -1, "If non-negative, run each test with each malloc in turn failing from the given number onwards.")
	mallocTestDebug = flag.Bool("malloc-test-debug", false, "If true, ask each test to abort rather than fail a malloc. This can be used with a specific value for --malloc-test to identity the malloc failing that is causing problems.")
	simulateARMCPUs = flag.Bool("simulate-arm-cpus", simulateARMCPUsDefault(), "If true, runs tests simulating different ARM CPUs.")
	)

	func simulateARMCPUsDefault() bool {
	return (runtime.GOOS == "linux" \|\| runtime.GOOS == "android") && (runtime.GOARCH == "arm" \|\| runtime.GOARCH == "arm64")
	}

	type test struct {
	testconfig.Test

	shard, numShards int
	// cpu, if not empty, contains a code to simulate. For SDE, run `sde64
	// -help` to get a list of these codes. For ARM, see gtest_main.cc for
	// the supported values.
	cpu string
	}

	type result struct {
	Test test
	Passed bool
	Error error
	}

	// sdeCPUs contains a list of CPU code that we run all tests under when *useSDE
	// is true.
	var sdeCPUs = []string{
	"p4p", // Pentium4 Prescott
	"mrm", // Merom
	"pnr", // Penryn
	"nhm", // Nehalem
	"wsm", // Westmere
	"snb", // Sandy Bridge
	"ivb", // Ivy Bridge
	"hsw", // Haswell
	"bdw", // Broadwell
	"slt", // Saltwell
	"slm", // Silvermont
	"glm", // Goldmont
	"glp", // Goldmont Plus
	"tnt", // Tremont
	"skl", // Skylake
	"cnl", // Cannon Lake
	"icl", // Ice Lake
	"skx", // Skylake server
	"clx", // Cascade Lake
	"cpx", // Cooper Lake
	"icx", // Ice Lake server
	"knl", // Knights landing
	"knm", // Knights mill
	"tgl", // Tiger Lake
	}

	var armCPUs = []string{
	"none", // No support for any ARM extensions.
	"neon", // Support for NEON.
	"crypto", // Support for NEON and crypto extensions.
	}

	func valgrindOf(dbAttach bool, path string, args ...string) *exec.Cmd {
	valgrindArgs := []string{"--error-exitcode=99", "--track-origins=yes", "--leak-check=full", "--quiet"}
	if dbAttach {
	valgrindArgs = append(valgrindArgs, "--db-attach=yes", "--db-command=xterm -e gdb -nw %f %p")
	}
	valgrindArgs = append(valgrindArgs, path)
	valgrindArgs = append(valgrindArgs, args...)

	return exec.Command("valgrind", valgrindArgs...)
	}

	func callgrindOf(path string, args ...string) *exec.Cmd {
	valgrindArgs := []string{"-q", "--tool=callgrind", "--dump-instr=yes", "--collect-jumps=yes", "--callgrind-out-file=" + *buildDir + "/callgrind/callgrind.out.%p"}
	valgrindArgs = append(valgrindArgs, path)
	valgrindArgs = append(valgrindArgs, args...)

	return exec.Command("valgrind", valgrindArgs...)
	}

	func gdbOf(path string, args ...string) *exec.Cmd {
	xtermArgs := []string{"-e", "gdb", "--args"}
	xtermArgs = append(xtermArgs, path)
	xtermArgs = append(xtermArgs, args...)

	return exec.Command("xterm", xtermArgs...)
	}

	func sdeOf(cpu, path string, args ...string) *exec.Cmd {
	sdeArgs := []string{"-" + cpu}
	// The kernel's vdso code for gettimeofday sometimes uses the RDTSCP
	// instruction. Although SDE has a -chip_check_vsyscall flag that
	// excludes such code by default, it does not seem to work. Instead,
	// pass the -chip_check_exe_only flag which retains test coverage when
	// statically linked and excludes the vdso.
	if cpu == "p4p" \|\| cpu == "pnr" \|\| cpu == "mrm" \|\| cpu == "slt" {
	sdeArgs = append(sdeArgs, "-chip_check_exe_only")
	}
	sdeArgs = append(sdeArgs, "--", path)
	sdeArgs = append(sdeArgs, args...)
	return exec.Command(*sdePath, sdeArgs...)
	}

	var (
	errMoreMallocs = errors.New("child process did not exhaust all allocation calls")
	errTestSkipped = errors.New("test was skipped")
	)

	func runTestOnce(test test, mallocNumToFail int64) (passed bool, err error) {
	prog := path.Join(*buildDir, test.Cmd[0])
	args := append([]string{}, test.Cmd[1:]...)
	if *simulateARMCPUs && test.cpu != "" {
	args = append(args, "--cpu="+test.cpu)
	}
	if *useSDE {
	// SDE is neither compatible with the unwind tester nor automatically
	// detected.
	args = append(args, "--no_unwind_tests")
	}
	var cmd *exec.Cmd
	if *useValgrind {
	cmd = valgrindOf(false, prog, args...)
	} else if *useCallgrind {
	cmd = callgrindOf(prog, args...)
	} else if *useGDB {
	cmd = gdbOf(prog, args...)
	} else if *useSDE {
	cmd = sdeOf(test.cpu, prog, args...)
	} else {
	cmd = exec.Command(prog, args...)
	}
	if test.Env != nil \|\| test.numShards != 0 {
	cmd.Env = make([]string, len(os.Environ()))
	copy(cmd.Env, os.Environ())
	}
	if test.Env != nil {
	cmd.Env = append(cmd.Env, test.Env...)
	}
	if test.numShards != 0 {
	cmd.Env = append(cmd.Env, fmt.Sprintf("GTEST_SHARD_INDEX=%d", test.shard))
	cmd.Env = append(cmd.Env, fmt.Sprintf("GTEST_TOTAL_SHARDS=%d", test.numShards))
	}
	var outBuf bytes.Buffer
	cmd.Stdout = &outBuf
	cmd.Stderr = &outBuf
	if mallocNumToFail >= 0 {
	cmd.Env = os.Environ()
	cmd.Env = append(cmd.Env, "MALLOC_NUMBER_TO_FAIL="+strconv.FormatInt(mallocNumToFail, 10))
	if *mallocTestDebug {
	cmd.Env = append(cmd.Env, "MALLOC_ABORT_ON_FAIL=1")
	}
	cmd.Env = append(cmd.Env, "_MALLOC_CHECK=1")
	}

	if err := cmd.Start(); err != nil {
	return false, err
	}
	if err := cmd.Wait(); err != nil {
	if exitError, ok := err.(*exec.ExitError); ok {
	switch exitError.Sys().(syscall.WaitStatus).ExitStatus() {
	case 88:
	return false, errMoreMallocs
	case 89:
	fmt.Print(string(outBuf.Bytes()))
	return false, errTestSkipped
	}
	}
	fmt.Print(string(outBuf.Bytes()))
	return false, err
	}

	// Account for Windows line-endings.
	stdout := bytes.Replace(outBuf.Bytes(), []byte("\r\n"), []byte("\n"), -1)

	if bytes.HasSuffix(stdout, []byte("PASS\n")) &&
	(len(stdout) == 5 \|\| stdout[len(stdout)-6] == '\n') {
	return true, nil
	}

	// Also accept a googletest-style pass line. This is left here in
	// transition until the tests are all converted and this script made
	// unnecessary.
	if bytes.Contains(stdout, []byte("\n[ PASSED ]")) {
	return true, nil
	}

	fmt.Print(string(outBuf.Bytes()))
	return false, nil
	}

	func runTest(test test) (bool, error) {
	if *mallocTest < 0 {
	return runTestOnce(test, -1)
	}

	for mallocNumToFail := int64(*mallocTest); ; mallocNumToFail++ {
	if passed, err := runTestOnce(test, mallocNumToFail); err != errMoreMallocs {
	if err != nil {
	err = fmt.Errorf("at malloc %d: %s", mallocNumToFail, err)
	}
	return passed, err
	}
	}
	}

	// setWorkingDirectory walks up directories as needed until the current working
	// directory is the top of a BoringSSL checkout.
	func setWorkingDirectory() {
	for i := 0; i < 64; i++ {
	if _, err := os.Stat("BUILDING.md"); err == nil {
	return
	}
	os.Chdir("..")
	}

	panic("Couldn't find BUILDING.md in a parent directory!")
	}

	func worker(tests <-chan test, results chan<- result, done *sync.WaitGroup) {
	defer done.Done()
	for test := range tests {
	passed, err := runTest(test)
	results <- result{test, passed, err}
	}
	}

	func (t test) shortName() string {
	return strings.Join(t.Cmd, " ") + t.shardMsg() + t.cpuMsg() + t.envMsg()
	}

	func SpaceIf(returnSpace bool) string {
	if !returnSpace {
	return ""
	}
	return " "
	}

	func (t test) longName() string {
	return strings.Join(t.Env, " ") + SpaceIf(len(t.Env) != 0) + strings.Join(t.Cmd, " ") + t.shardMsg() + t.cpuMsg()
	}

	func (t test) shardMsg() string {
	if t.numShards == 0 {
	return ""
	}

	return fmt.Sprintf(" [shard %d/%d]", t.shard+1, t.numShards)
	}

	func (t test) cpuMsg() string {
	if len(t.cpu) == 0 {
	return ""
	}

	return fmt.Sprintf(" (for CPU %q)", t.cpu)
	}

	func (t test) envMsg() string {
	if len(t.Env) == 0 {
	return ""
	}

	return " (custom environment)"
	}

	func (t test) getGTestShards() ([]test, error) {
	if *numWorkers == 1 \|\| !t.Shard {
	return []test{t}, nil
	}

	shards := make([]test, *numWorkers)
	for i := range shards {
	shards[i] = t
	shards[i].shard = i
	shards[i].numShards = *numWorkers
	}

	return shards, nil
	}

	func main() {
	flag.Parse()
	setWorkingDirectory()

	testCases, err := testconfig.ParseTestConfig("util/all_tests.json")
	if err != nil {
	fmt.Printf("Failed to parse input: %s\n", err)
	os.Exit(1)
	}

	var wg sync.WaitGroup
	tests := make(chan test, *numWorkers)
	results := make(chan result, *numWorkers)

	for i := 0; i < *numWorkers; i++ {
	wg.Add(1)
	go worker(tests, results, &wg)
	}

	go func() {
	for _, baseTest := range testCases {
	test := test{Test: baseTest}
	if *useSDE {
	if test.SkipSDE {
	continue
	}
	// SDE generates plenty of tasks and gets slower
	// with additional sharding.
	for _, cpu := range sdeCPUs {
	testForCPU := test
	testForCPU.cpu = cpu
	tests <- testForCPU
	}
	} else if *simulateARMCPUs {
	// This mode is run instead of the default path,
	// so also include the native flow.
	tests <- test
	for _, cpu := range armCPUs {
	testForCPU := test
	testForCPU.cpu = cpu
	tests <- testForCPU
	}
	} else {
	shards, err := test.getGTestShards()
	if err != nil {
	fmt.Printf("Error listing tests: %s\n", err)
	os.Exit(1)
	}
	for _, shard := range shards {
	tests <- shard
	}
	}
	}
	close(tests)

	wg.Wait()
	close(results)
	}()

	testOutput := testresult.NewResults()
	var failed, skipped []test
	for testResult := range results {
	test := testResult.Test
	args := test.Cmd

	if testResult.Error == errTestSkipped {
	fmt.Printf("%s\n", test.longName())
	fmt.Printf("%s was skipped\n", args[0])
	skipped = append(skipped, test)
	testOutput.AddSkip(test.longName())
	} else if testResult.Error != nil {
	fmt.Printf("%s\n", test.longName())
	fmt.Printf("%s failed to complete: %s\n", args[0], testResult.Error)
	failed = append(failed, test)
	testOutput.AddResult(test.longName(), "CRASH")
	} else if !testResult.Passed {
	fmt.Printf("%s\n", test.longName())
	fmt.Printf("%s failed to print PASS on the last line.\n", args[0])
	failed = append(failed, test)
	testOutput.AddResult(test.longName(), "FAIL")
	} else {
	fmt.Printf("%s\n", test.shortName())
	testOutput.AddResult(test.longName(), "PASS")
	}
	}

	if *jsonOutput != "" {
	if err := testOutput.WriteToFile(*jsonOutput); err != nil {
	fmt.Fprintf(os.Stderr, "Error: %s\n", err)
	}
	}

	if len(skipped) > 0 {
	fmt.Printf("\n%d of %d tests were skipped:\n", len(skipped), len(testCases))
	for _, test := range skipped {
	fmt.Printf("\t%s\n", test.shortName())
	}
	}

	if len(failed) > 0 {
	fmt.Printf("\n%d of %d tests failed:\n", len(failed), len(testCases))
	for _, test := range failed {
	fmt.Printf("\t%s\n", test.shortName())
	}
	os.Exit(1)
	}

	fmt.Printf("All unit tests passed!\n")
	}