Crash reporter plugin

Summary: iOS side of crash reporter plugin

Reviewed By: jknoxville

Differential Revision: D13176725

fbshipit-source-id: be104958c5e26aa67709a33ef43c0b99600ca2b7

iOS/Plugins/FlipperKitCrashReporterPlugin/FlipperKitCrashReporterPlugin/FlipperKitCrashReporterPlugin.h

@@ -0,0 +1,19 @@
+/*
+ *  Copyright (c) Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+#if FB_SONARKIT_ENABLED
+
+#import <Foundation/Foundation.h>
+#import <FlipperKit/FlipperPlugin.h>
+
+@interface FlipperKitCrashReporterPlugin : NSObject<FlipperPlugin>
+- (instancetype)init NS_UNAVAILABLE;
++ (instancetype) sharedInstance;
+@end
+
+
+#endif

iOS/Plugins/FlipperKitCrashReporterPlugin/FlipperKitCrashReporterPlugin/FlipperKitCrashReporterPlugin.mm

@@ -0,0 +1,76 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+ #if FB_SONARKIT_ENABLED
+ #import "FlipperKitCrashReporterPlugin.h"
+#import <FlipperKit/FlipperConnection.h>
+
+@interface FlipperKitCrashReporterPlugin()
+@property (strong, nonatomic) id<FlipperConnection> connection;
+@property (assign, nonatomic) NSUInteger notificationID;
+@property (assign, nonatomic) NSUncaughtExceptionHandler *prevHandler;
+- (void) handleException:(NSException *)exception;
+
+@end
+
+void flipperkitUncaughtExceptionHandler(NSException *exception) {
+  NSLog(@"CRASH: %@", exception);
+  NSLog(@"Stack Trace: %@", [exception callStackSymbols]);
+  [[FlipperKitCrashReporterPlugin sharedInstance] handleException:exception];
+}
+
+@implementation FlipperKitCrashReporterPlugin
+
+- (instancetype)init {
+  if (self = [super init]) {
+    _connection = nil;
+    _notificationID = 0;
+    _prevHandler = NSGetUncaughtExceptionHandler();
+  }
+  return self;
+}
+
++ (instancetype)sharedInstance {
+  static FlipperKitCrashReporterPlugin *sInstance = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sInstance = [FlipperKitCrashReporterPlugin new];
+  });
+
+  return sInstance;
+}
+
+- (NSString *)identifier {
+  return @"CrashReporter";
+}
+
+- (void) handleException:(NSException *)exception {
+  // TODO: Rather than having indirection from c function, somehow pass objective c selectors as a c function pointer to NSSetUncaughtExceptionHandler
+  self.notificationID += 1;
+  [self.connection send:@"crash-report" withParams:@{@"reason": [exception reason], @"name": [exception name], @"callstack": [exception callStackSymbols]}];
+    if (self.prevHandler) {
+        self.prevHandler(exception);
+    }
+}
+
+- (void)didConnect:(id<FlipperConnection>)connection {
+  self.connection = connection;
+  NSSetUncaughtExceptionHandler(&flipperkitUncaughtExceptionHandler);
+}
+
+- (void)didDisconnect {
+  self.connection = nil;
+  NSSetUncaughtExceptionHandler(self.prevHandler);
+}
+
+- (BOOL)runInBackground {
+  return YES;
+}
+
+@end
+#endif