neoneye · October 4, 2015 19:15 · Oct 9, 2013 · Oct 9, 2013 · Sep 30, 2013 · Sep 30, 2013
diff --git a/ignore_specified_objc_exceptions.py b/ignore_specified_objc_exceptions.py
@@ -10,6 +10,8 @@ def getRegister(target):
         return "rdi"
     elif target.triple.startswith('i386'):
         return "eax"
+    elif target.triple.startswith('arm64'):
+        return "x0"
     else:
         return "r0"
 

diff --git a/ignore_specified_objc_exceptions.py b/ignore_specified_objc_exceptions.py
@@ -8,20 +8,37 @@
 def getRegister(target):
     if target.triple.startswith('x86_64'):
         return "rdi"
+    elif target.triple.startswith('i386'):
+        return "eax"
     else:
         return "r0"
 
+def callMethodOnException(frame, register, method):
+    return frame.EvaluateExpression("(NSString *)[(NSException *)${0} {1}]".format(register, method)).GetObjectDescription()
 
-def command(debugger, user_input, result, unused):
+def filterException(debugger, user_input, result, unused):
     target = debugger.GetSelectedTarget()
     frame = target.GetProcess().GetSelectedThread().GetFrameAtIndex(0)
+
+    if frame.symbol.name != 'objc_exception_throw':
+        # We can't handle anything except objc_exception_throw
+        return None
+
     filters = shlex.split(user_input)
 
     register = getRegister(target)
 
+
     for filter in filters:
         method, regexp_str = filter.split(":", 1)
-        value = frame.EvaluateExpression("(NSString *)[(NSException *)${0} {1}]".format(register, method)).GetObjectDescription()
+        value = callMethodOnException(frame, register, method)
+
+        if value is None:
+            output = "Unable to grab exception from register {0} with method {1}; skipping...".format(register, method)
+            result.PutCString(output)
+            result.flush()
+            continue
+
         regexp = re.compile(regexp_str)
 
         if regexp.match(value):
@@ -39,5 +56,4 @@ def command(debugger, user_input, result, unused):
     return None
 
 def __lldb_init_module(debugger, unused):
-    debugger.HandleCommand('command script add --function ignore_specified_objc_exceptions.command ignore_specified_objc_exceptions')
-
+    debugger.HandleCommand('command script add --function ignore_specified_objc_exceptions.filterException ignore_specified_objc_exceptions')
diff --git a/ignore_specified_objc_exceptions.py b/ignore_specified_objc_exceptions.py
@@ -21,7 +21,7 @@ def command(debugger, user_input, result, unused):
 
     for filter in filters:
         method, regexp_str = filter.split(":", 1)
-        value = frame.EvaluateExpression("(NSString *)[(NSException *)$" + register + " " + method + "]").GetObjectDescription()
+        value = frame.EvaluateExpression("(NSString *)[(NSException *)${0} {1}]".format(register, method)).GetObjectDescription()
         regexp = re.compile(regexp_str)
 
         if regexp.match(value):
@@ -40,3 +40,4 @@ def command(debugger, user_input, result, unused):
 
 def __lldb_init_module(debugger, unused):
     debugger.HandleCommand('command script add --function ignore_specified_objc_exceptions.command ignore_specified_objc_exceptions')
+
diff --git a/ignore_specified_objc_exceptions.py b/ignore_specified_objc_exceptions.py
@@ -4,16 +4,24 @@
 
 # This script allows Xcode to selectively ignore Obj-C exceptions
 # based on any selector on the NSException instance
-
+
+def getRegister(target):
+    if target.triple.startswith('x86_64'):
+        return "rdi"
+    else:
+        return "r0"
+
 
 def command(debugger, user_input, result, unused):
     target = debugger.GetSelectedTarget()
     frame = target.GetProcess().GetSelectedThread().GetFrameAtIndex(0)
     filters = shlex.split(user_input)
 
+    register = getRegister(target)
+
     for filter in filters:
         method, regexp_str = filter.split(":", 1)
-        value = frame.EvaluateExpression("(NSString *)[(NSException *)$rdi " + method + "]").GetObjectDescription()
+        value = frame.EvaluateExpression("(NSString *)[(NSException *)$" + register + " " + method + "]").GetObjectDescription()
         regexp = re.compile(regexp_str)
 
         if regexp.match(value):
@@ -32,4 +40,3 @@ def command(debugger, user_input, result, unused):
 
 def __lldb_init_module(debugger, unused):
     debugger.HandleCommand('command script add --function ignore_specified_objc_exceptions.command ignore_specified_objc_exceptions')
-
diff --git a/ignore_specified_objc_exceptions.py b/ignore_specified_objc_exceptions.py
@@ -0,0 +1,35 @@
+import lldb
+import re
+import shlex
+
+# This script allows Xcode to selectively ignore Obj-C exceptions
+# based on any selector on the NSException instance
+
+
+def command(debugger, user_input, result, unused):
+    target = debugger.GetSelectedTarget()
+    frame = target.GetProcess().GetSelectedThread().GetFrameAtIndex(0)
+    filters = shlex.split(user_input)
+
+    for filter in filters:
+        method, regexp_str = filter.split(":", 1)
+        value = frame.EvaluateExpression("(NSString *)[(NSException *)$rdi " + method + "]").GetObjectDescription()
+        regexp = re.compile(regexp_str)
+
+        if regexp.match(value):
+            output = "Skipping exception because exception's {0} ({1}) matches {2}".format(method, value, regexp_str)
+            result.PutCString(output)
+            result.flush()
+
+            # If we tell the debugger to continue before this script finishes,
+            # Xcode gets into a weird state where it won't refuse to quit LLDB,
+            # so we set async so the script terminates and hands control back to Xcode
+            debugger.SetAsync(True)
+            debugger.HandleCommand("continue")
+            return None
+
+    return None
+
+def __lldb_init_module(debugger, unused):
+    debugger.HandleCommand('command script add --function ignore_specified_objc_exceptions.command ignore_specified_objc_exceptions')
+