[Mono-dev] Embedded mono bug "The 'ExeConfigFilename' argument cannot be null"

[Tim Matthews]

Hi I noticed a bug that was introduced in Mono 3 for embedding mono:

#include <glib.h>
#include <mono/jit/jit.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/object.h>

#include <stdio.h>

int
main (int argc, char* argv[]) {
    MonoDomain *domain;
    MonoImage *image;
  MonoAssemblyName *assemName;
  MonoAssembly *assem;
  MonoMethodDesc* desc;
  MonoMethod* method;

  mono_config_parse(NULL);
    domain = mono_jit_init (argv [0]);

  assemName = mono_assembly_name_new("System.Windows.Forms,
Culture=neutral, PublicKeyToken=b77a5c561934e089");
  assem = mono_assembly_load(assemName, NULL, NULL);
  image = mono_assembly_get_image(assem);
  desc =
mono_method_desc_new("System.Windows.Forms.Application:EnableVisualStyles()",
1);
  method = mono_method_desc_search_in_image(desc, image);

  printf("About to crash\n");

  mono_runtime_invoke(method, NULL, NULL, NULL);  //crash

    mono_jit_cleanup (domain);
    return 0;
}




Produces the following output:

% ./a.out
About to crash

Unhandled Exception:
System.TypeInitializationException: An exception was thrown by the type
initializer for System.Windows.Forms.XplatUI --->
System.TypeInitializationException: An exception was thrown by the type
initializer for System.Net.Sockets.Socket --->
System.Configuration.ConfigurationErrorsException: Error Initializing the
configuration system. ---> System.ArgumentException: The
'ExeConfigFilename' argument cannot be null.
  at System.Configuration.ExeConfigurationHost.CheckFileMap
(ConfigurationUserLevel level, System.Configuration.ExeConfigurationFileMap
map) [0x00000] in <filename unknown>:0
  at System.Configuration.ExeConfigurationHost.InitForConfiguration
(System.String& locationSubPath, System.String& configPath, System.String&
locationConfigPath, IInternalConfigRoot root, System.Object[]
hostInitConfigurationParams) [0x00000] in <filename unknown>:0
  at System.Configuration.InternalConfigurationSystem.InitForConfiguration
(System.String& locationConfigPath, System.String& parentConfigPath,
System.String& parentLocationConfigPath) [0x00000] in <filename unknown>:0
  at System.Configuration.Configuration..ctor
(System.Configuration.InternalConfigurationSystem system, System.String
locationSubPath) [0x00000] in <filename unknown>:0
  at System.Configuration.InternalConfigurationFactory.Create (System.Type
typeConfigHost, System.Object[] hostInitConfigurationParams) [0x00000] in
<filename unknown>:0
  at System.Configuration.ConfigurationManager.OpenExeConfigurationInternal
(ConfigurationUserLevel userLevel, System.Reflection.Assembly
calling_assembly, System.String exePath) [0x00000] in <filename unknown>:0
  at System.Configuration.ClientConfigurationSystem.get_Configuration ()
[0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Configuration.ClientConfigurationSystem.get_Configuration ()
[0x00000] in <filename unknown>:0
  at
System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection
(System.String configKey) [0x00000] in <filename unknown>:0
  at System.Configuration.ConfigurationManager.GetSection (System.String
sectionName) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.Socket.CheckProtocolSupport () [0x00000] in
<filename unknown>:0
  at System.Net.Sockets.Socket..cctor () [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.XplatUIX11.SetDisplay (IntPtr display_handle)
[0x00000] in <filename unknown>:0
  at System.Windows.Forms.XplatUIX11..ctor () [0x00000] in <filename
unknown>:0
  at System.Windows.Forms.XplatUIX11.GetInstance () [0x00000] in <filename
unknown>:0
  at System.Windows.Forms.XplatUI..cctor () [0x00000] in <filename
unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.Application.EnableVisualStyles () [0x00000] in
<filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: An
exception was thrown by the type initializer for
System.Windows.Forms.XplatUI ---> System.TypeInitializationException: An
exception was thrown by the type initializer for System.Net.Sockets.Socket
---> System.Configuration.ConfigurationErrorsException: Error Initializing
the configuration system. ---> System.ArgumentException: The
'ExeConfigFilename' argument cannot be null.
  at System.Configuration.ExeConfigurationHost.CheckFileMap
(ConfigurationUserLevel level, System.Configuration.ExeConfigurationFileMap
map) [0x00000] in <filename unknown>:0
  at System.Configuration.ExeConfigurationHost.InitForConfiguration
(System.String& locationSubPath, System.String& configPath, System.String&
locationConfigPath, IInternalConfigRoot root, System.Object[]
hostInitConfigurationParams) [0x00000] in <filename unknown>:0
  at System.Configuration.InternalConfigurationSystem.InitForConfiguration
(System.String& locationConfigPath, System.String& parentConfigPath,
System.String& parentLocationConfigPath) [0x00000] in <filename unknown>:0
  at System.Configuration.Configuration..ctor
(System.Configuration.InternalConfigurationSystem system, System.String
locationSubPath) [0x00000] in <filename unknown>:0
  at System.Configuration.InternalConfigurationFactory.Create (System.Type
typeConfigHost, System.Object[] hostInitConfigurationParams) [0x00000] in
<filename unknown>:0
  at System.Configuration.ConfigurationManager.OpenExeConfigurationInternal
(ConfigurationUserLevel userLevel, System.Reflection.Assembly
calling_assembly, System.String exePath) [0x00000] in <filename unknown>:0
  at System.Configuration.ClientConfigurationSystem.get_Configuration ()
[0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Configuration.ClientConfigurationSystem.get_Configuration ()
[0x00000] in <filename unknown>:0
  at
System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection
(System.String configKey) [0x00000] in <filename unknown>:0
  at System.Configuration.ConfigurationManager.GetSection (System.String
sectionName) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.Socket.CheckProtocolSupport () [0x00000] in
<filename unknown>:0
  at System.Net.Sockets.Socket..cctor () [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.XplatUIX11.SetDisplay (IntPtr display_handle)
[0x00000] in <filename unknown>:0
  at System.Windows.Forms.XplatUIX11..ctor () [0x00000] in <filename
unknown>:0
  at System.Windows.Forms.XplatUIX11.GetInstance () [0x00000] in <filename
unknown>:0
  at System.Windows.Forms.XplatUI..cctor () [0x00000] in <filename
unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.Application.EnableVisualStyles () [0x00000] in
<filename unknown>:0
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