[Mono-bugs] [Bug 69972][Cri] New - crashbug passing big struct by value

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Changed by joe@otee.dk.

http://bugzilla.ximian.com/show_bug.cgi?id=69972

--- shadow/69972	2004-11-27 21:50:08.000000000 -0500
+++ shadow/69972.tmp.15854	2004-11-27 21:50:08.000000000 -0500
@@ -0,0 +1,86 @@
+Bug#: 69972
+Product: Mono: Runtime
+Version: 1.0
+OS: 
+OS Details: Mac os x 10.3.5 mono 1.1.2 and 1.0.2
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Critical
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: joe@otee.dk               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: crashbug passing big struct by value
+
+Running the following c sharp application, i get a crash inside:
+Thread 2 Crashed:
+0   libSystem.B.dylib   	0x9000147c szone_free + 0x3dc
+1   libSystem.B.dylib   	0x9000879c szone_realloc + 0x8bc
+2   libSystem.B.dylib   	0x9000a96c malloc_zone_realloc + 0x6c
+3   libSystem.B.dylib   	0x90008a1c realloc + 0xfc
+4   libglib-2.0.0.dylib 	0x0014a57c g_realloc + 0x40 (gmem.c:170)
+5   libmono.0.dylib     	0x00447564 mono_arch_output_basic_block + 0xac (mini-ppc.c:2277)
+6   libmono.0.dylib     	0x0043183c mono_codegen + 0xd0 (mini.c:7318)
+7   libmono.0.dylib     	0x00432454 mini_method_compile + 0x400 (mini.c:7795)
+8   libmono.0.dylib     	0x00432a50 mono_jit_compile_method_inner + 0x228 (mini.c:7947)
+9   libmono.0.dylib     	0x0044e860 ppc_magic_trampoline + 0x28 (tramp-ppc.c:108)
+10  <<00000000>> 	0x0300eb14 0 + 0x300eb14
+11  <<00000000>> 	0x00032c6c 0 + 0x32c6c
+12  <<00000000>> 	0x00032890 0 + 0x32890
+13  libmono.0.dylib     	0x004770f4 mono_runtime_exec_main + 0x144 (object.c:1576)
+14  libmono.0.dylib     	0x00476cbc mono_runtime_run_main + 0x224 (object.c:1429)
+15  libmono.0.dylib     	0x00498314 start_wrapper + 0xb4 (threads.c:292)
+16  libmono.0.dylib     	0x004df7b8 timed_thread_start_routine + 0xe4 (timed-thread.c:135)
+17  libSystem.B.dylib   	0x900246e8 _pthread_body + 0x28
+
+Malloc debug says:
+malloc[29984]: error for object 0xc43b30: Incorrect checksum for freed object - object was 
+probably modified after being freed; break at szone_error
+
+This happens on mac
+
+---
+
+using System;
+
+public class Test
+{
+	static void Main ()
+	{
+		Matrix4x4 m = TestPassing (Matrix4x4.identity, Matrix4x4.identity, 
+Matrix4x4.identity);
+		Console.WriteLine ("Done!");
+	}
+	
+	static Matrix4x4 TestPassing (Matrix4x4 a, Matrix4x4 b, Matrix4x4 c)
+	{
+		return Matrix4x4.identity;
+	}
+}
+
+public struct Matrix4x4
+{
+	float m00, m10, m20, m30;
+    float m01, m11, m21, m31;
+ 	float m02, m12, m22, m32;
+    float m03, m13, m23, m33;
+
+	static public Matrix4x4 identity
+	{
+		get
+		{
+			Matrix4x4 m;
+			m.m00 = 1F; m.m01 = 0F; m.m02 = 0F; m.m03 = 0F;
+			m.m10 = 0F; m.m11 = 1F; m.m12 = 0F; m.m13 = 0F;
+			m.m20 = 0F; m.m21 = 0F; m.m22 = 1F; m.m23 = 0F;
+			m.m30 = 0F; m.m31 = 0F; m.m32 = 0F; m.m33 = 1F;
+			return m;
+		}
+	}
+}
+
+----