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carlpetocarlpeto
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[Backtracing][Tests] add unit tests for coloured/uncoloured output
rdar://164624364
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‎test/Backtracing/Inputs/CrashSubprocess.swift‎

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#if os(macOS)
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internal import Darwin
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#elseif canImport(Glibc)
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internal import Glibc
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#elseif canImport(Musl)
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internal import Musl
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#endif
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func level1() {
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level2()
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}
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func level2() {
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level3()
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}
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func level3() {
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level4()
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}
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func level4() {
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level5()
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}
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func level5() {
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print("About to crash")
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let ptr = UnsafeMutablePointer<Int>(bitPattern: 4)!
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ptr.pointee = 42
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}
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@main
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struct Crash {
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static func main() {
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print("subprocess stdout is a tty: \(isatty(1))")
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print("subprocess stderr is a tty: \(isatty(2))")
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level1()
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}
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}

‎test/Backtracing/TTYDetection.swift‎

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// RUN: %empty-directory(%t)
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// RUN: %target-build-swift %s -parse-as-library -Onone -g -o %t/TTYDetection
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// RUN: %target-codesign %t/TTYDetection
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// RUN: (env SWIFT_BACKTRACE=enable=yes,cache=no %target-run %t/TTYDetection 2> %t/default-output || true) && cat %t/default-output | %FileCheck %s
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// RUN: (env SWIFT_BACKTRACE=enable=yes,cache=no,output-to=stderr %target-run %t/TTYDetection 2> %t/stderr-output || true) && cat %t/stderr-output | %FileCheck %s --check-prefix STDERR
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// RUN: (env SWIFT_BACKTRACE=enable=yes,cache=no,output-to=stdout %target-run %t/TTYDetection > %t/stdout-output || true) && cat %t/stdout-output | %FileCheck %s --check-prefix STDOUT
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// UNSUPPORTED: use_os_stdlib
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// UNSUPPORTED: back_deployment_runtime
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// UNSUPPORTED: asan
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// REQUIRES: executable_test
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// REQUIRES: backtracing
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// REQUIRES: OS=macosx || OS=linux-gnu
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// COM: we should be able to add Windows to this test
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func level1() {
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level2()
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}
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func level2() {
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level3()
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}
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func level3() {
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level4()
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}
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func level4() {
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level5()
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}
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func level5() {
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print("About to crash")
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let ptr = UnsafeMutablePointer<Int>(bitPattern: 4)!
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ptr.pointee = 42
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}
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@main
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struct TTYDetection {
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static func main() {
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level1()
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}
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}
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// CHECK: *** Program crashed: Bad pointer dereference at 0x{{0+}}4 ***
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// CHECK: Thread 0 {{(".*" )?}}crashed:
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// CHECK: 0 0x{{[0-9a-f]+}} level5() + {{[0-9]+}} in TTYDetection
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// CHECK-NEXT: 1 [ra] 0x{{[0-9a-f]+}} level4() + {{[0-9]+}} in TTYDetection
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// CHECK-NEXT: 2 [ra] 0x{{[0-9a-f]+}} level3() + {{[0-9]+}} in TTYDetection
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// CHECK-NEXT: 3 [ra] 0x{{[0-9a-f]+}} level2() + {{[0-9]+}} in TTYDetection
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// STDERR: *** Program crashed: Bad pointer dereference at 0x{{0+}}4 ***
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// STDERR: Thread 0 {{(".*" )?}}crashed:
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// STDERR: 0 0x{{[0-9a-f]+}} level5() + {{[0-9]+}} in TTYDetection
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// STDERR-NEXT: 1 [ra] 0x{{[0-9a-f]+}} level4() + {{[0-9]+}} in TTYDetection
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// STDERR-NEXT: 2 [ra] 0x{{[0-9a-f]+}} level3() + {{[0-9]+}} in TTYDetection
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// STDERR-NEXT: 3 [ra] 0x{{[0-9a-f]+}} level2() + {{[0-9]+}} in TTYDetection
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// STDOUT: *** Program crashed: Bad pointer dereference at 0x{{0+}}4 ***
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// STDOUT: Thread 0 {{(".*" )?}}crashed:
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// STDOUT: 0 0x{{[0-9a-f]+}} level5() + {{[0-9]+}} in TTYDetection
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// STDOUT-NEXT: 1 [ra] 0x{{[0-9a-f]+}} level4() + {{[0-9]+}} in TTYDetection
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// STDOUT-NEXT: 2 [ra] 0x{{[0-9a-f]+}} level3() + {{[0-9]+}} in TTYDetection
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// STDOUT-NEXT: 3 [ra] 0x{{[0-9a-f]+}} level2() + {{[0-9]+}} in TTYDetection

‎test/Backtracing/TTYDetectionColourLinux.swift‎

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// RUN: %empty-directory(%t)
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// RUN: %target-build-swift %S/Inputs/CrashSubprocess.swift -parse-as-library -Onone -g -o %t/crash
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// RUN: %target-codesign %t/crash
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// RUN: %target-build-swift %s -o %t/crash-host
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// RUN: (env SWIFT_BACKTRACE=enable=yes,cache=no,interactive=no %target-run %t/crash-host %t/crash)| %FileCheck %s
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// UNSUPPORTED: use_os_stdlib
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// UNSUPPORTED: back_deployment_runtime
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// UNSUPPORTED: asan
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// REQUIRES: executable_test
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// REQUIRES: backtracing
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// REQUIRES: OS=linux-gnu || OS=macosx
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// COM: this test would need significant rework on Windows/WinSDK, but is not critical function so probably not worth porting the test to that platform
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#if os(macOS)
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internal import Darwin
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#elseif canImport(Glibc)
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internal import Glibc
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#elseif canImport(Musl)
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internal import Musl
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#endif
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guard CommandLine.arguments.count > 1 else {
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fputs("Usage: \(CommandLine.arguments[0]) <path-to-crash>\n", stderr)
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exit(1)
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}
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let crashPath = CommandLine.arguments[1]
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// CHECK: host stdout is a tty: 0
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print("host stdout is a tty: \(isatty(1))")
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// (piped output on linux is fully buffered by default)
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fflush(stdout)
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// CHECK: host stderr is a tty: 0
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print("host stderr is a tty: \(isatty(2))")
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fflush(stdout)
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var masterFD: Int32 = 0
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var slaveFD: Int32 = 0
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let slaveName = UnsafeMutablePointer<CChar>.allocate(capacity: 1024)
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guard openpty(&masterFD, &slaveFD, slaveName, nil, nil) == 0 else {
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perror("openpty")
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exit(1)
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}
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// CHECK: slave is: /dev/{{.+}}
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print("slave is: \(String(cString: slaveName))")
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slaveName.deallocate()
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fflush(stdout)
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// try to avoid using Foundation, use Posix primitives instead
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var childPid: pid_t = 0
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#if os(macOS)
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var childFileActions: posix_spawn_file_actions_t?
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posix_spawn_file_actions_init(&childFileActions)
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posix_spawn_file_actions_adddup2(&childFileActions, slaveFD, STDOUT_FILENO)
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posix_spawn_file_actions_adddup2(&childFileActions, slaveFD, STDERR_FILENO)
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guard posix_spawn(&childPid, Array<CChar>(crashPath.utf8CString), &childFileActions, nil, nil, environ) == 0 else {
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perror("unable to spawn child")
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exit(1)
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}
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posix_spawn_file_actions_destroy(&childFileActions)
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#elseif os(Linux)
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var childFileActions = posix_spawn_file_actions_t()
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posix_spawn_file_actions_init(&childFileActions)
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posix_spawn_file_actions_adddup2(&childFileActions, slaveFD, STDOUT_FILENO)
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posix_spawn_file_actions_adddup2(&childFileActions, slaveFD, STDERR_FILENO)
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var argv: [UnsafeMutablePointer<CChar>?] = [nil]
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guard posix_spawn(&childPid, Array<CChar>(crashPath.utf8CString), &childFileActions, nil, argv, environ) == 0 else {
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perror("unable to spawn child")
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exit(1)
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}
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posix_spawn_file_actions_destroy(&childFileActions)
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#endif
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// CHECK: child pid is {{[0-9]+}}
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print("child pid is \(childPid)")
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fflush(stdout)
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// the parent process should now close this FD as it is used by the child for stdout/stderr
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close(slaveFD)
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// CHECK: subprocess stdout is a tty: 1
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// CHECK: subprocess stderr is a tty: 1
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// CHECK: About to crash
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// CHECK: 💣{{.*}}Program crashed: Bad pointer dereference at 0x{{0+}}4
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// CHECK: Thread 0 {{(".*" )?}}crashed:
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// CHECK: Backtrace took {{[0-9.]+}}s
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// allow the child process time to start, and crash...
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sleep(1)
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// now read the standard output and error from our master pty
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// and write it to our own standard output for scanning by FileCheck
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let bufferSize = 4096
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let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
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var bytesRead = read(masterFD, buffer, bufferSize)
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while bytesRead > 0 {
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write(1, buffer, bytesRead)
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bytesRead = read(masterFD, buffer, bufferSize)
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}
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close(masterFD)
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buffer.deallocate()
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// CHECK-NOT: child exited with status: 0
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var childExitStatus: Int32 = 0
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waitpid(childPid, &childExitStatus, 0)
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print("child exited with status: \(childExitStatus)")

‎test/Backtracing/TTYDetectionColourMacOS.swift‎

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// RUN: %empty-directory(%t)
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// RUN: %target-build-swift %s -parse-as-library -Onone -g -o %t/TTYDetection
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// RUN: %target-codesign %t/TTYDetection
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// RUN: (env SWIFT_BACKTRACE=enable=yes,cache=no,interactive=no %target-run script -reF %t/script-output %t/TTYDetection || true) && cat %t/script-output | %FileCheck %s
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// UNSUPPORTED: use_os_stdlib
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// UNSUPPORTED: back_deployment_runtime
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// UNSUPPORTED: asan
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// REQUIRES: executable_test
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// REQUIRES: backtracing
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// REQUIRES: OS=macosx
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// COM: this won't work on Windows, but is not critical function
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func level1() {
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level2()
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}
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func level2() {
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level3()
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}
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func level3() {
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level4()
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}
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func level4() {
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level5()
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}
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func level5() {
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print("About to crash")
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let ptr = UnsafeMutablePointer<Int>(bitPattern: 4)!
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ptr.pointee = 42
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}
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@main
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struct TTYDetection {
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static func main() {
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level1()
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}
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}
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// CHECK: 💣{{.*}}Program crashed: Bad pointer dereference at 0x{{0+}}4
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// CHECK: Thread 0 {{(".*" )?}}crashed:

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