Add option to open app with JIT

RootHelper/Makefile

@@ -14,6 +14,6 @@ trollstorehelper_CODESIGN_FLAGS = --entitlements entitlements.plist
 trollstorehelper_INSTALL_PATH = /usr/local/bin
 trollstorehelper_LIBRARIES = archive
 trollstorehelper_FRAMEWORKS = CoreTelephony
-trollstorehelper_PRIVATE_FRAMEWORKS = SpringBoardServices BackBoardServices MobileContainerManager FrontBoardServices
+trollstorehelper_PRIVATE_FRAMEWORKS = SpringBoardServices BackBoardServices MobileContainerManager FrontBoardServices RunningBoardServices
 
 include $(THEOS_MAKE_PATH)/tool.mk

RootHelper/entitlements.plist

@@ -48,5 +48,7 @@
     <true/>
     <key>com.apple.frontboard.shutdown</key>
     <true/>
+    <key>com.apple.runningboard.process-state</key>
+    <true/>
 </dict>
 </plist>

RootHelper/jit.h

@@ -0,0 +1,3 @@
+#import <Foundation/Foundation.h>
+
+int enableJIT(NSString *bundleID);

RootHelper/jit.m

@@ -0,0 +1,45 @@
+@import Foundation;
+@import Darwin;
+
+@interface RBSProcessPredicate
++ (instancetype)predicateMatchingBundleIdentifier:(NSString *)bundleID;
+@end
+
+@interface RBSProcessHandle
++ (instancetype)handleForPredicate:(RBSProcessPredicate *)predicate error:(NSError **)error;
+- (int)rbs_pid;
+@end
+
+#define PT_DETACH       11
+#define PT_ATTACHEXC    14
+int	 ptrace(int request, pid_t pid, caddr_t addr, int data);
+
+int enableJIT(NSString *bundleID) {
+#ifdef EMBEDDED_ROOT_HELPER
+ 	return -1;
+#else
+ 	RBSProcessPredicate *predicate = [RBSProcessPredicate predicateMatchingBundleIdentifier:bundleID];
+	RBSProcessHandle* process = [RBSProcessHandle handleForPredicate:predicate error:nil];
+	int pid = process.rbs_pid;
+
+	if (!pid)
+	{
+		return ESRCH;
+	}
+
+	int ret = ptrace(PT_ATTACHEXC, pid, 0, 0);
+	if (ret == -1)
+	{
+		return errno;
+	}
+
+	usleep(100000);
+	ret = ptrace(PT_DETACH, pid, 0, 0);
+	if (ret == -1)
+	{
+		return errno;
+	}
+	return 0;
+#endif
+}
+

RootHelper/main.m

@@ -11,6 +11,7 @@
 #import <mach-o/loader.h>
 #import <mach-o/fat.h>
 #import "devmode.h"
+#import "jit.h"
 #ifndef EMBEDDED_ROOT_HELPER
 #import "codesign.h"
 #import "coretrust_bug.h"
@@ -1573,6 +1574,12 @@ int MAIN_NAME(int argc, char *argv[], char *envp[])
 			// Give the system some time to reboot
 			sleep(1);
 		}
+		else if([cmd isEqualToString:@"enable-jit"])
+		{
+			if(args.count < 2) return -3;
+			NSString* userAppId = args.lastObject;
+			ret = enableJIT(userAppId);
+		}
 
 		NSLog(@"trollstorehelper returning %d", ret);
 		return ret;