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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2025 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Foundation
import SWBLibc
public enum Debugger: Sendable {
public static func pause() {
#if os(Windows)
DebugActiveProcess(GetCurrentProcessId())
#else
raise(SIGSTOP)
#endif
}
public static func resume() {
#if os(Windows)
DebugActiveProcessStop(GetCurrentProcessId())
#else
raise(SIGCONT)
#endif
}
public static func isAttached() throws -> Bool {
#if canImport(Darwin)
var info = kinfo_proc()
var mib: [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()]
var size = MemoryLayout<kinfo_proc>.stride
if sysctl(&mib, u_int(mib.count), &info, &size, nil, 0) != 0 {
throw POSIXError(errno, context: "sysctl")
}
return (info.kp_proc.p_flag & P_TRACED) != 0
#else
throw StubError.error("Debugger detection is not supported on this platform")
#endif
}
public static func waitForAttachment(_ condition: @escaping () throws -> Bool = { true }) async throws {
var attached = try isAttached()
while !attached {
try await Task.sleep(for: .seconds(0.1))
guard try condition() else {
return
}
attached = try isAttached()
}
}
public static var isXcodeAutoAttachEnabled: Bool {
return ProcessInfo.processInfo.environment["IB_AUTO_ATTACH_ENABLED"]?.boolValue == true
}
public static func waitForXcodeAutoAttachIfEnabled() async throws {
#if canImport(Darwin)
if isXcodeAutoAttachEnabled {
try await waitForAttachment() {
// Exit if parent process died while waiting for debugger
if kill(getppid(), 0) != 0 { // ignore-unacceptable-language; POSIX API
throw StubError.error("Parent process exited while waiting for debugger")
}
return true
}
}
#else
throw StubError.error("Debugger detection is not supported on this platform")
#endif
}
public static func requestXcodeAutoAttachIfEnabled(_ remoteToolPID: Int32) throws {
#if canImport(Darwin)
if isXcodeAutoAttachEnabled, let sendPipeName = ProcessInfo.processInfo.environment["IB_AUTO_ATTACH_PIPE_NAME"] {
let returnPipeName = "/tmp/Xcode.IBCTTAutoAttachPipe.Return.\(getpid()).\(remoteToolPID)"
unlink(returnPipeName)
let success = mkfifo(returnPipeName, S_IRWXU | S_IRWXG | S_IRWXO) == 0
if let writeHandle = FileHandle(forWritingAtPath: sendPipeName) {
let payload = "\(getpid()).\(remoteToolPID).IBCocoaFramework;"
try writeHandle.write(contentsOf: Data(payload.utf8))
try writeHandle.close()
}
if success {
if let readHandle = FileHandle(forReadingAtPath: returnPipeName) {
_ = try readHandle.readToEnd()
try readHandle.close()
}
unlink(returnPipeName)
}
}
#else
throw StubError.error("Debugger detection is not supported on this platform")
#endif
}
}
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