[Mono-osx] Bug: Using interop that return struct crashes
Phi Le
iamphi at gmail.com
Fri Feb 6 15:58:04 EST 2009
Bug filed at https://bugzilla.novell.com/show_bug.cgi?id=473530
On Fri, Feb 6, 2009 at 10:30 AM, Geoff Norton <gnorton at novell.com> wrote:
> Please file a bug at bugzilla.novell.com
>
> On Fri, 2009-02-06 at 10:17 -0800, Phi Le wrote:
>> Hello,
>>
>> I am having problems calling CoreGraphics interops that return structs
>> in an embedded instance of mono. I am using Mono 2.2 on OS X 10.5.6.
>> I have attached and included the code to reproduce the problem. I
>> have found 3 different errors using different structs. Take a look at
>> my gdb output. Interestingly, there were no problem if the struct
>> contains just a pointer (void */IntPtr), or just an int.
>>
>> I know how to work around the problem by using an out parameter, but I
>> would like a solution where I can use the original function signature.
>>
>> Thanks,
>>
>> Phi
>>
>> File: MyClass.cs
>> <code>
>> using System;
>> using System.Runtime.InteropServices;
>>
>> namespace Test {
>> public class MyClass {
>> public static void Main(String[] args) {
>> try {
>> Console.WriteLine("MyClass.Main()");
>> InterOpTest();
>> } catch (Exception ex) {
>> Console.WriteLine(ex.ToString());
>> }
>> }
>>
>> [DllImport("__Internal")]
>> private static extern MyStruct InterOpTest();
>>
>> }
>>
>> [StructLayout(LayoutKind.Sequential)]
>> public struct MyStruct {
>> //public char x;
>> //public int y;
>> //public float f;
>> public IntPtr p;
>> }
>> }
>> </code>
>>
>> File: main.c
>> <code>
>> #include <mono/jit/jit.h>
>> #include <mono/metadata/assembly.h>
>>
>> struct MyStruct {
>> //char x;
>> //int y;
>> //float f;
>> void * p;
>> };
>> typedef struct MyStruct MyStruct;
>>
>> MyStruct InterOpTest() {
>> fprintf(stderr, "MyStruct InterOpTest()\n");
>> MyStruct retVal;
>> return retVal;
>> }
>>
>> int main(int argc, char *argv[])
>> {
>> char* file = "MyClass.exe";
>>
>> MonoAssembly* assembly;
>> MonoDomain* domain;
>>
>> domain = mono_jit_init(file);
>> assembly = mono_domain_assembly_open (domain, file);
>> mono_jit_exec(domain, assembly, 1, argv);
>> return 0;
>> }
>> </code>
>>
>> File: Makefile
>> <code>
>> all:
>> mcs MyClass.cs
>> gcc main.c `pkg-config --cflags --libs mono`
>> clean:
>> rm MyClass.exe a.out
>> </code>
>>
>>
>>
>>
>> gdb output for: struct { char x; }
>> <terminal>
>> phis-macbook-pro:monoTest phi$ make
>> mcs MyClass.cs
>> gcc main.c `pkg-config --cflags --libs mono`
>> phis-macbook-pro:monoTest phi$ gdb a.out
>> GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40 UTC 2008)
>> Copyright 2004 Free Software Foundation, Inc.
>> GDB is free software, covered by the GNU General Public License, and you are
>> welcome to change it and/or distribute copies of it under certain conditions.
>> Type "show copying" to see the conditions.
>> There is absolutely no warranty for GDB. Type "show warranty" for details.
>> This GDB was configured as "i386-apple-darwin"...Reading symbols for
>> shared libraries ....... done
>>
>> (gdb) run
>> Starting program: /Users/phi/workspace/monoTest/a.out
>> Reading symbols for shared libraries
>> ++++++..............................................................................
>> done
>> MyClass.Main()
>>
>> Program received signal SIGBUS, Bus error.
>> 0x008ea7d5 in mono_decompose_vtype_opts (cfg=0x110b6a0) at decompose.c:1185
>> 1185 decompose.c: No such file or directory.
>> in decompose.c
>> (gdb) where
>> #0 0x008ea7d5 in mono_decompose_vtype_opts (cfg=0x110b6a0) at decompose.c:1185
>> #1 0x0089ff00 in mini_method_compile (method=0x181aa94,
>> opts=64055807, domain=0x5fe70, run_cctors=1, compile_aot=0, parts=0)
>> at mini.c:12656
>> #2 0x008a0ba1 in mono_jit_compile_method (method=0x181aa94) at mini.c:13134
>> #3 0x008a0947 in mono_jit_compile_method (method=0x181a924) at mini.c:13122
>> #4 0x0091eebd in mono_magic_trampoline (regs=0xbffff7d8, code=0x802b1
>> "??\f?:", m=0x181a924, tramp=0x0) at mini-trampolines.c:290
>> #5 0x00025066 in ?? ()
>> #6 0x00080203 in ?? ()
>> #7 0x009df9e4 in mono_runtime_exec_main (method=0x1803c64,
>> args=0x66ea0, exc=0x0) at object.c:3299
>> #8 0x009e3a17 in mono_runtime_run_main (method=0x1803c64, argc=1,
>> argv=0xbffff9a8, exc=0x0) at object.c:3084
>> #9 0x00001fcf in main ()
>> (gdb) quit
>> The program is running. Exit anyway? (y or n) y
>> phis-macbook-pro:monoTest phi$
>> </terminal>
>>
>> gdb output for: struct { char x; int y;}
>> <terminal>
>> (gdb) run
>> Starting program: /Users/phi/workspace/monoTest/a.out
>> Reading symbols for shared libraries
>> ++++++..............................................................................
>> done
>> MyClass.Main()
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x8fe18c02 in __dyld_misaligned_stack_error ()
>> (gdb) where
>> #0 0x8fe18c02 in __dyld_misaligned_stack_error ()
>> #1 0x00000053 in ?? ()
>> #2 0x00001f6b in InterOpTest ()
>> #3 0x000848a5 in ?? ()
>> #4 0x000802b1 in ?? ()
>> #5 0x00080203 in ?? ()
>> #6 0x009df9e4 in mono_runtime_exec_main (method=0x1803c64,
>> args=0x66ea0, exc=0x0) at object.c:3299
>> #7 0x009e3a17 in mono_runtime_run_main (method=0x1803c64, argc=1,
>> argv=0xbffff9a8, exc=0x0) at object.c:3084
>> #8 0x00001fd1 in main ()
>> (gdb)
>> </terminal>
>>
>> gdb output for: struct { float f; }
>> <terminal>
>> gdb) run
>> Starting program: /Users/phi/workspace/monoTest/a.out
>> Reading symbols for shared libraries
>> ++++++..............................................................................
>> done
>> MyClass.Main()
>> **
>> ERROR:mini-x86.c:2020:emit_move_return_value: code should not be reached
>>
>> Program received signal SIGABRT, Aborted.
>> 0x919d4e42 in __kill ()
>> (gdb) where
>> #0 0x919d4e42 in __kill ()
>> #1 0x919d4e34 in kill$UNIX2003 ()
>> #2 0x91a4723a in raise ()
>> #3 0x91a53679 in abort ()
>> #4 0x00121f74 in g_assertion_message ()
>> #5 0x0093203a in emit_move_return_value (cfg=0x110bb10, ins=0xadc1ac,
>> code=0x184302b "") at mini-x86.c:2020
>> #6 0x009337ce in mono_arch_output_basic_block (cfg=0x110bb10,
>> bb=0x182457c) at mini-x86.c:2865
>> #7 0x00866332 in mono_codegen (cfg=0x110bb10) at mini.c:11955
>> #8 0x0089f4b0 in mini_method_compile (method=0x181aa94,
>> opts=64055807, domain=0x5fe70, run_cctors=1, compile_aot=0, parts=0)
>> at mini.c:12807
>> #9 0x008a0ba1 in mono_jit_compile_method (method=0x181aa94) at mini.c:13134
>> #10 0x008a0947 in mono_jit_compile_method (method=0x181a924) at mini.c:13122
>> #11 0x0091eebd in mono_magic_trampoline (regs=0xbffff7d8, code=0x802b1
>> "??\f?:", m=0x181a924, tramp=0x0) at mini-trampolines.c:290
>> #12 0x00025066 in ?? ()
>> #13 0x00080203 in ?? ()
>> #14 0x009df9e4 in mono_runtime_exec_main (method=0x1803c64,
>> args=0x66ea0, exc=0x0) at object.c:3299
>> #15 0x009e3a17 in mono_runtime_run_main (method=0x1803c64, argc=1,
>> argv=0xbffff9a8, exc=0x0) at object.c:3084
>> #16 0x00001fce in main ()
>> (gdb)
>> </terminal>
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