Add signal handler callback

Classes/BITCrashManager.m

@@ -28,7 +28,7 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#import "HockeySDK.h"
+#import "HockeySDKFeatureConfig.h"
 
 #if HOCKEYSDK_FEATURE_CRASH_REPORTER
 
@@ -39,13 +39,20 @@
 #import "BITHockeyHelper.h"
 #import "BITHockeyAppClient.h"
 
+#import "BITCrashManager.h"
+#import "BITCrashManagerPrivate.h"
 #import "BITCrashAttachment.h"
 #import "BITHockeyBaseManagerPrivate.h"
-#import "BITCrashManagerPrivate.h"
 #import "BITCrashReportTextFormatter.h"
 #import "BITCrashDetailsPrivate.h"
 #import "BITCrashCXXExceptionHandler.h"
 
+#if HOCKEYSDK_FEATURE_METRICS
+#import "BITMetricsManagerPrivate.h"
+#import "BITChannel.h"
+#import "BITPersistencePrivate.h"
+#endif
+
 #include <sys/sysctl.h>
 
 // stores the set of crashreports that have been approved but aren't sent yet
@@ -81,16 +88,40 @@ NSString *const kBITFakeCrashDeviceModel = @"BITFakeCrashDeviceModel";
 NSString *const kBITFakeCrashAppBinaryUUID = @"BITFakeCrashAppBinaryUUID";
 NSString *const kBITFakeCrashReport = @"BITFakeCrashAppString";
 
+#if HOCKEYSDK_FEATURE_METRICS
+static char const *BITSaveEventsFilePath;
+#endif
 
 static BITCrashManagerCallbacks bitCrashCallbacks = {
   .context = NULL,
   .handleSignal = NULL
 };
 
-// proxy implementation for PLCrashReporter to keep our interface stable while this can change
+#if HOCKEYSDK_FEATURE_METRICS
+static void bit_save_events_callback(siginfo_t *info, ucontext_t *uap, void *context) {
+  // Try to get a file descriptor with our pre-filled path
+  int fd = open(BITSaveEventsFilePath, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+  if (fd < 0) {
+    return;
+  }
+  
+  size_t len = strlen(BITSafeJsonEventsString);
+  if (len > 0) {
+    // Simply write the whole string to disk
+    write(fd, BITSafeJsonEventsString, len);
+  }
+  close(fd);
+}
+#endif
+
+// Proxy implementation for PLCrashReporter to keep our interface stable while this can change
 static void plcr_post_crash_callback (siginfo_t *info, ucontext_t *uap, void *context) {
-  if (bitCrashCallbacks.handleSignal != NULL)
+#if HOCKEYSDK_FEATURE_METRICS
+  bit_save_events_callback(info, uap, context);
+#endif
+  if (bitCrashCallbacks.handleSignal != NULL) {
     bitCrashCallbacks.handleSignal(context);
+  }
 }
 
 static PLCrashReporterCallbacks plCrashCallbacks = {
@@ -99,7 +130,6 @@ static PLCrashReporterCallbacks plCrashCallbacks = {
   .handleSignal = plcr_post_crash_callback
 };
 
-
 // Temporary class until PLCR catches up
 // We trick PLCR with an Objective-C exception.
 //
@@ -154,8 +184,6 @@ static void uncaught_cxx_exception_handler(const BITCrashUncaughtCXXExceptionInf
   NSString       *_settingsFile;
   NSString       *_analyzerInProgressFile;
   NSFileManager  *_fileManager;
-    
-  PLCrashReporterCallbacks *_crashCallBacks;
   
   BOOL _crashIdenticalCurrentVersion;
   
@@ -183,7 +211,6 @@ static void uncaught_cxx_exception_handler(const BITCrashUncaughtCXXExceptionInf
     
     _plCrashReporter = nil;
     _exceptionHandler = nil;
-    _crashCallBacks = nil;
     
     _crashIdenticalCurrentVersion = YES;
     
@@ -657,17 +684,18 @@ static void uncaught_cxx_exception_handler(const BITCrashUncaughtCXXExceptionInf
   return useremail;
 }
 
-
-#pragma mark - Public
-
+#pragma mark - CrashCallbacks
 
 /**
  *  Set the callback for PLCrashReporter
  *
  *  @param callbacks BITCrashManagerCallbacks instance
  */
-- (void)setCrashCallbacks: (BITCrashManagerCallbacks *) callbacks {
+- (void)setCrashCallbacks:(BITCrashManagerCallbacks *)callbacks {
   if (!callbacks) return;
+  if (_isSetup) {
+    BITHockeyLog(@"CrashCallbacks need to be configured before calling startManager!");
+  }
   
   // set our proxy callback struct
   bitCrashCallbacks.context = callbacks->context;
@@ -675,10 +703,17 @@ static void uncaught_cxx_exception_handler(const BITCrashUncaughtCXXExceptionInf
   
   // set the PLCrashReporterCallbacks struct
   plCrashCallbacks.context = callbacks->context;
-  
-  _crashCallBacks = &plCrashCallbacks;
 }
 
+#if HOCKEYSDK_FEATURE_METRICS
+- (void)configDefaultCrashCallback {
+  BITMetricsManager *metricsManager = [BITHockeyManager sharedHockeyManager].metricsManager;
+  BITPersistence *persistence = metricsManager.persistence;
+  BITSaveEventsFilePath = strdup([persistence fileURLForType:BITPersistenceTypeTelemetry].UTF8String);
+}
+#endif
+
+#pragma mark - Public
 
 - (void)setAlertViewHandler:(BITCustomAlertViewHandler)alertViewHandler{
   _alertViewHandler = alertViewHandler;
@@ -1174,10 +1209,11 @@ static void uncaught_cxx_exception_handler(const BITCrashUncaughtCXXExceptionInf
         // can't break this
         NSError *error = NULL;
         
-        // set any user defined callbacks, hopefully the users knows what they do
-        if (_crashCallBacks) {
-          [self.plCrashReporter setCrashCallbacks:_crashCallBacks];
-        }
+#if HOCKEYSDK_FEATURE_METRICS
+        [self configDefaultCrashCallback];
+#endif
+        // Set plCrashReporter callback which contains our default callback and potentially user defined callbacks
+        [self.plCrashReporter setCrashCallbacks:&plCrashCallbacks];
         
         // Enable the Crash Reporter
         if (![self.plCrashReporter enableCrashReporterAndReturnError: &error])