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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#if canImport(OSLog)
import OSLog
/// Reads oslog messages to find recent sourcekitd crashes.
struct OSLogScraper {
/// How far into the past we should search for crashes in OSLog.
var searchDuration: TimeInterval
private func getLogEntries(matching predicate: NSPredicate) throws -> [any OSLogEntryWithPayload & OSLogEntry] {
let logStore = try OSLogStore.local()
let startPoint = logStore.position(date: Date().addingTimeInterval(-searchDuration))
return
try logStore
.getEntries(
at: startPoint,
matching: predicate
).compactMap { $0 as? (OSLogEntryWithPayload & OSLogEntry) }
}
private func crashedSourceKitLSPRequests() throws -> [(name: String, logCategory: String)] {
let predicate = NSPredicate(
format: #"subsystem CONTAINS "sourcekit-lsp" AND composedMessage CONTAINS "sourcekitd crashed (1/""#
)
return try getLogEntries(matching: predicate).map {
(name: "Crash at \($0.date)", logCategory: $0.category)
}
}
/// Get the `RequestInfo` for a crash that was logged in `logCategory`.
private func requestInfo(for logCategory: String) throws -> RequestInfo {
let predicate = NSPredicate(
format:
#"subsystem CONTAINS "sourcekit-lsp" AND composedMessage CONTAINS "sourcekitd crashed" AND category = %@"#,
logCategory
)
var isInFileContentSection = false
var request = ""
var fileContents = ""
for entry in try getLogEntries(matching: predicate) {
for line in entry.composedMessage.components(separatedBy: "\n") {
if line.starts(with: "sourcekitd crashed (") {
continue
}
if line == "Request:" {
continue
}
if line == "File contents:" {
isInFileContentSection = true
continue
}
if line == "--- End Chunk" {
continue
}
if isInFileContentSection {
fileContents += line + "\n"
} else {
request += line + "\n"
}
}
}
var requestInfo = try RequestInfo(request: request)
requestInfo.fileContents = fileContents
return requestInfo
}
/// Get information about sourcekitd crashes that haven logged to OSLog.
/// This information can be used to reduce the crash.
///
/// Name is a human readable name that identifies the crash.
func getCrashedRequests() throws -> [(name: String, info: RequestInfo)] {
let crashedRequests = try crashedSourceKitLSPRequests().reversed()
return crashedRequests.compactMap { (name: String, logCategory: String) -> (name: String, info: RequestInfo)? in
guard let requestInfo = try? requestInfo(for: logCategory) else {
return nil
}
return (name, requestInfo)
}
}
}
#endif
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