/**
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* \file
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* Images created at runtime.
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*
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*
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* Author:
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* Paolo Molaro (lupus@ximian.com)
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*
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* Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
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* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
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* Copyright 2011 Rodrigo Kumpera
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* Copyright 2016 Microsoft
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*
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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|
#include <config.h>
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#include <glib.h>
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#include "mono/metadata/object.h"
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#include "mono/metadata/dynamic-image-internals.h"
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#include "mono/metadata/dynamic-stream-internals.h"
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#include "mono/metadata/gc-internals.h"
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#include "mono/metadata/metadata-internals.h"
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#include "mono/metadata/profiler-private.h"
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#include "mono/metadata/reflection-internals.h"
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#include "mono/metadata/sre-internals.h"
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#include "mono/utils/checked-build.h"
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#include "mono/utils/mono-error-internals.h"
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#include "mono/utils/mono-os-mutex.h"
|
|
const unsigned char table_sizes [MONO_TABLE_NUM] = {
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MONO_MODULE_SIZE,
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MONO_TYPEREF_SIZE,
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MONO_TYPEDEF_SIZE,
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0,
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MONO_FIELD_SIZE,
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0,
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MONO_METHOD_SIZE,
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0,
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MONO_PARAM_SIZE,
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MONO_INTERFACEIMPL_SIZE,
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MONO_MEMBERREF_SIZE, /* 0x0A */
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MONO_CONSTANT_SIZE,
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MONO_CUSTOM_ATTR_SIZE,
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MONO_FIELD_MARSHAL_SIZE,
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MONO_DECL_SECURITY_SIZE,
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MONO_CLASS_LAYOUT_SIZE,
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MONO_FIELD_LAYOUT_SIZE, /* 0x10 */
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MONO_STAND_ALONE_SIGNATURE_SIZE,
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MONO_EVENT_MAP_SIZE,
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0,
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MONO_EVENT_SIZE,
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MONO_PROPERTY_MAP_SIZE,
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0,
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MONO_PROPERTY_SIZE,
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MONO_METHOD_SEMA_SIZE,
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MONO_METHODIMPL_SIZE,
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MONO_MODULEREF_SIZE, /* 0x1A */
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MONO_TYPESPEC_SIZE,
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MONO_IMPLMAP_SIZE,
|
MONO_FIELD_RVA_SIZE,
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0,
|
0,
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MONO_ASSEMBLY_SIZE, /* 0x20 */
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MONO_ASSEMBLY_PROCESSOR_SIZE,
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MONO_ASSEMBLYOS_SIZE,
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MONO_ASSEMBLYREF_SIZE,
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MONO_ASSEMBLYREFPROC_SIZE,
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MONO_ASSEMBLYREFOS_SIZE,
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MONO_FILE_SIZE,
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MONO_EXP_TYPE_SIZE,
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MONO_MANIFEST_SIZE,
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MONO_NESTED_CLASS_SIZE,
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MONO_GENERICPARAM_SIZE, /* 0x2A */
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MONO_METHODSPEC_SIZE,
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MONO_GENPARCONSTRAINT_SIZE
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};
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// The dynamic images list is only needed to support the mempool reference tracking feature in checked-build.
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static GPtrArray *dynamic_images;
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static mono_mutex_t dynamic_images_mutex;
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static inline void
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dynamic_images_lock (void)
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{
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mono_os_mutex_lock (&dynamic_images_mutex);
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}
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static inline void
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dynamic_images_unlock (void)
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{
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mono_os_mutex_unlock (&dynamic_images_mutex);
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}
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void
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mono_dynamic_images_init (void)
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{
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mono_os_mutex_init (&dynamic_images_mutex);
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}
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#ifndef DISABLE_REFLECTION_EMIT
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static void
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string_heap_init (MonoDynamicStream *sh)
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{
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mono_dynstream_init (sh);
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}
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#endif
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#ifndef DISABLE_REFLECTION_EMIT
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static int
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mono_blob_entry_hash (const char* str)
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{
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MONO_REQ_GC_NEUTRAL_MODE;
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guint len, h;
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const char *end;
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len = mono_metadata_decode_blob_size (str, &str);
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if (len > 0) {
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end = str + len;
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h = *str;
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for (str += 1; str < end; str++)
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h = (h << 5) - h + *str;
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return h;
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} else {
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return 0;
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}
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}
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static gboolean
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mono_blob_entry_equal (const char *str1, const char *str2) {
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MONO_REQ_GC_NEUTRAL_MODE;
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int len, len2;
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const char *end1;
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const char *end2;
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len = mono_metadata_decode_blob_size (str1, &end1);
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len2 = mono_metadata_decode_blob_size (str2, &end2);
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if (len != len2)
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return 0;
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return memcmp (end1, end2, len) == 0;
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}
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#endif
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|
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/**
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* mono_find_dynamic_image_owner:
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*
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* Find the dynamic image, if any, which a given pointer is located in the memory of.
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*/
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MonoImage *
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mono_find_dynamic_image_owner (void *ptr)
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{
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MonoImage *owner = NULL;
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int i;
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dynamic_images_lock ();
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if (dynamic_images)
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{
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for (i = 0; !owner && i < dynamic_images->len; ++i) {
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MonoImage *image = (MonoImage *)g_ptr_array_index (dynamic_images, i);
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if (mono_mempool_contains_addr (image->mempool, ptr))
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owner = image;
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}
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}
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dynamic_images_unlock ();
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return owner;
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}
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static inline void
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dynamic_image_lock (MonoDynamicImage *image)
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{
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MONO_ENTER_GC_SAFE;
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mono_image_lock ((MonoImage*)image);
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MONO_EXIT_GC_SAFE;
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}
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static inline void
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dynamic_image_unlock (MonoDynamicImage *image)
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{
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mono_image_unlock ((MonoImage*)image);
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}
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#ifndef DISABLE_REFLECTION_EMIT
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/*
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* mono_dynamic_image_register_token:
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*
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* Register the TOKEN->OBJ mapping in the mapping table in ASSEMBLY. This is required for
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* the Module.ResolveXXXToken () methods to work.
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*/
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void
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mono_dynamic_image_register_token (MonoDynamicImage *assembly, guint32 token, MonoObjectHandle obj, int how_collide)
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{
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MONO_REQ_GC_UNSAFE_MODE;
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g_assert (!MONO_HANDLE_IS_NULL (obj));
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g_assert (strcmp (mono_handle_class (obj)->name, "EnumBuilder"));
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dynamic_image_lock (assembly);
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MonoObject *prev = (MonoObject *)mono_g_hash_table_lookup (assembly->tokens, GUINT_TO_POINTER (token));
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if (prev) {
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switch (how_collide) {
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case MONO_DYN_IMAGE_TOK_NEW:
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g_warning ("%s: Unexpected previous object when called with MONO_DYN_IMAGE_TOK_NEW", __func__);
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break;
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case MONO_DYN_IMAGE_TOK_SAME_OK:
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if (prev != MONO_HANDLE_RAW (obj)) {
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g_warning ("%s: condition `prev == MONO_HANDLE_RAW (obj)' not met", __func__);
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}
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break;
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case MONO_DYN_IMAGE_TOK_REPLACE:
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break;
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default:
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g_assert_not_reached ();
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}
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}
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mono_g_hash_table_insert (assembly->tokens, GUINT_TO_POINTER (token), MONO_HANDLE_RAW (obj));
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dynamic_image_unlock (assembly);
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}
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#else
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void
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mono_dynamic_image_register_token (MonoDynamicImage *assembly, guint32 token, MonoObjectHandle obj, int how_collide)
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{
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}
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#endif
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static MonoObject*
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lookup_dyn_token (MonoDynamicImage *assembly, guint32 token)
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{
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MONO_REQ_GC_UNSAFE_MODE;
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MonoObject *obj;
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dynamic_image_lock (assembly);
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obj = (MonoObject *)mono_g_hash_table_lookup (assembly->tokens, GUINT_TO_POINTER (token));
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dynamic_image_unlock (assembly);
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return obj;
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}
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#ifndef DISABLE_REFLECTION_EMIT
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MonoObjectHandle
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mono_dynamic_image_get_registered_token (MonoDynamicImage *dynimage, guint32 token, MonoError *error)
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{
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error_init (error);
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return MONO_HANDLE_NEW (MonoObject, lookup_dyn_token (dynimage, token));
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}
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#else /* DISABLE_REFLECTION_EMIT */
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MonoObjectHandle
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mono_dynamic_image_get_registered_token (MonoDynamicImage *dynimage, guint32 token, MonoError *error)
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{
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g_assert_not_reached ();
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return NULL_HANDLE;
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}
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#endif
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/**
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*
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* mono_dynamic_image_is_valid_token:
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*
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* Returns TRUE if token is valid in the given image.
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*
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*/
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gboolean
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mono_dynamic_image_is_valid_token (MonoDynamicImage *image, guint32 token)
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{
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return lookup_dyn_token (image, token) != NULL;
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}
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#ifndef DISABLE_REFLECTION_EMIT
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#endif /* DISABLE_REFLECTION_EMIT */
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#ifndef DISABLE_REFLECTION_EMIT
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/**
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* mono_reflection_lookup_dynamic_token:
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*
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* Finish the Builder object pointed to by TOKEN and return the corresponding
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* runtime structure. If HANDLE_CLASS is not NULL, it is set to the class required by
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* mono_ldtoken. If valid_token is TRUE, assert if it is not found in the token->object
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* mapping table.
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*
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* LOCKING: Take the loader lock
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*/
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gpointer
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mono_reflection_lookup_dynamic_token (MonoImage *image, guint32 token, gboolean valid_token, MonoClass **handle_class, MonoGenericContext *context, MonoError *error)
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{
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MonoDynamicImage *assembly = (MonoDynamicImage*)image;
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MonoObject *obj;
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MonoClass *klass;
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error_init (error);
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obj = lookup_dyn_token (assembly, token);
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if (!obj) {
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if (valid_token)
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g_error ("Could not find required dynamic token 0x%08x", token);
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else {
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mono_error_set_execution_engine (error, "Could not find dynamic token 0x%08x", token);
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return NULL;
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}
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}
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if (!handle_class)
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handle_class = &klass;
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gpointer result = mono_reflection_resolve_object (image, obj, handle_class, context, error);
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return result;
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}
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#else /* DISABLE_REFLECTION_EMIT */
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gpointer
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mono_reflection_lookup_dynamic_token (MonoImage *image, guint32 token, gboolean valid_token, MonoClass **handle_class, MonoGenericContext *context, MonoError *error)
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{
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error_init (error);
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return NULL;
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}
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#endif /* DISABLE_REFLECTION_EMIT */
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#ifndef DISABLE_REFLECTION_EMIT
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MonoDynamicImage*
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mono_dynamic_image_create (MonoDynamicAssembly *assembly, char *assembly_name, char *module_name)
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{
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static const guchar entrycode [16] = {0xff, 0x25, 0};
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MonoDynamicImage *image;
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int i;
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const char *version;
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if (!strcmp (mono_get_runtime_info ()->framework_version, "2.1"))
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version = "v2.0.50727"; /* HACK: SL 2 enforces the .net 2 metadata version */
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else
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version = mono_get_runtime_info ()->runtime_version;
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image = g_new0 (MonoDynamicImage, 1);
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MONO_PROFILER_RAISE (image_loading, (&image->image));
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/*g_print ("created image %p\n", image);*/
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/* keep in sync with image.c */
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image->image.name = assembly_name;
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image->image.assembly_name = image->image.name; /* they may be different */
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image->image.module_name = module_name;
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image->image.version = g_strdup (version);
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image->image.md_version_major = 1;
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image->image.md_version_minor = 1;
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image->image.dynamic = TRUE;
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image->image.references = g_new0 (MonoAssembly*, 1);
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image->image.references [0] = NULL;
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mono_image_init (&image->image);
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image->token_fixups = mono_g_hash_table_new_type ((GHashFunc)mono_object_hash, NULL, MONO_HASH_KEY_GC, MONO_ROOT_SOURCE_REFLECTION, NULL, "Reflection Dynamic Image Token Fixup Table");
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image->method_to_table_idx = g_hash_table_new (NULL, NULL);
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image->field_to_table_idx = g_hash_table_new (NULL, NULL);
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image->method_aux_hash = g_hash_table_new (NULL, NULL);
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image->vararg_aux_hash = g_hash_table_new (NULL, NULL);
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image->handleref = g_hash_table_new (NULL, NULL);
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image->tokens = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_REFLECTION, NULL, "Reflection Dynamic Image Token Table");
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image->generic_def_objects = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_REFLECTION, NULL, "Reflection Dynamic Image Generic Definition Table");
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image->typespec = g_hash_table_new ((GHashFunc)mono_metadata_type_hash, (GCompareFunc)mono_metadata_type_equal);
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image->typeref = g_hash_table_new ((GHashFunc)mono_metadata_type_hash, (GCompareFunc)mono_metadata_type_equal);
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image->blob_cache = g_hash_table_new ((GHashFunc)mono_blob_entry_hash, (GCompareFunc)mono_blob_entry_equal);
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image->gen_params = g_ptr_array_new ();
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image->remapped_tokens = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_REFLECTION, NULL, "Reflection Dynamic Image Remapped Token Table");
|
|
/*g_print ("string heap create for image %p (%s)\n", image, module_name);*/
|
string_heap_init (&image->sheap);
|
mono_dynstream_add_data (&image->us, "", 1);
|
mono_dynamic_image_add_to_blob_cached (image, (char*) "", 1, NULL, 0);
|
/* import tables... */
|
mono_dynstream_add_data (&image->code, (char*)entrycode, sizeof (entrycode));
|
image->iat_offset = mono_dynstream_add_zero (&image->code, 8); /* two IAT entries */
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image->idt_offset = mono_dynstream_add_zero (&image->code, 2 * sizeof (MonoIDT)); /* two IDT entries */
|
image->imp_names_offset = mono_dynstream_add_zero (&image->code, 2); /* flags for name entry */
|
mono_dynstream_add_data (&image->code, "_CorExeMain", 12);
|
mono_dynstream_add_data (&image->code, "mscoree.dll", 12);
|
image->ilt_offset = mono_dynstream_add_zero (&image->code, 8); /* two ILT entries */
|
mono_dynstream_data_align (&image->code);
|
|
image->cli_header_offset = mono_dynstream_add_zero (&image->code, sizeof (MonoCLIHeader));
|
|
for (i=0; i < MONO_TABLE_NUM; ++i) {
|
image->tables [i].next_idx = 1;
|
image->tables [i].columns = table_sizes [i];
|
}
|
|
image->image.assembly = (MonoAssembly*)assembly;
|
image->run = assembly->run;
|
image->save = assembly->save;
|
image->pe_kind = 0x1; /* ILOnly */
|
image->machine = 0x14c; /* I386 */
|
|
MONO_PROFILER_RAISE (image_loaded, (&image->image));
|
|
dynamic_images_lock ();
|
|
if (!dynamic_images)
|
dynamic_images = g_ptr_array_new ();
|
|
g_ptr_array_add (dynamic_images, image);
|
|
dynamic_images_unlock ();
|
|
return image;
|
}
|
#else /* DISABLE_REFLECTION_EMIT */
|
MonoDynamicImage*
|
mono_dynamic_image_create (MonoDynamicAssembly *assembly, char *assembly_name, char *module_name)
|
{
|
g_assert_not_reached ();
|
return NULL;
|
}
|
#endif /* DISABLE_REFLECTION_EMIT */
|
|
guint32
|
mono_dynamic_image_add_to_blob_cached (MonoDynamicImage *assembly, char *b1, int s1, char *b2, int s2)
|
{
|
MONO_REQ_GC_NEUTRAL_MODE;
|
|
guint32 idx;
|
char *copy;
|
gpointer oldkey, oldval;
|
|
copy = (char *)g_malloc (s1+s2);
|
memcpy (copy, b1, s1);
|
memcpy (copy + s1, b2, s2);
|
if (g_hash_table_lookup_extended (assembly->blob_cache, copy, &oldkey, &oldval)) {
|
g_free (copy);
|
idx = GPOINTER_TO_UINT (oldval);
|
} else {
|
idx = mono_dynstream_add_data (&assembly->blob, b1, s1);
|
mono_dynstream_add_data (&assembly->blob, b2, s2);
|
g_hash_table_insert (assembly->blob_cache, copy, GUINT_TO_POINTER (idx));
|
}
|
return idx;
|
}
|
|
void
|
mono_dynimage_alloc_table (MonoDynamicTable *table, guint nrows)
|
{
|
MONO_REQ_GC_NEUTRAL_MODE;
|
|
table->rows = nrows;
|
g_assert (table->columns);
|
if (nrows + 1 >= table->alloc_rows) {
|
while (nrows + 1 >= table->alloc_rows) {
|
if (table->alloc_rows == 0)
|
table->alloc_rows = 16;
|
else
|
table->alloc_rows *= 2;
|
}
|
|
table->values = (guint32 *)g_renew (guint32, table->values, (table->alloc_rows) * table->columns);
|
}
|
}
|
|
|
static void
|
free_blob_cache_entry (gpointer key, gpointer val, gpointer user_data)
|
{
|
g_free (key);
|
}
|
|
static void
|
release_hashtable (MonoGHashTable **hash)
|
{
|
if (*hash) {
|
mono_g_hash_table_destroy (*hash);
|
*hash = NULL;
|
}
|
}
|
|
void
|
mono_dynamic_image_release_gc_roots (MonoDynamicImage *image)
|
{
|
release_hashtable (&image->token_fixups);
|
release_hashtable (&image->tokens);
|
release_hashtable (&image->remapped_tokens);
|
release_hashtable (&image->generic_def_objects);
|
}
|
|
// Free dynamic image pass one: Free resources but not image itself
|
void
|
mono_dynamic_image_free (MonoDynamicImage *image)
|
{
|
MonoDynamicImage *di = image;
|
GList *list;
|
int i;
|
|
if (di->typespec)
|
g_hash_table_destroy (di->typespec);
|
if (di->typeref)
|
g_hash_table_destroy (di->typeref);
|
if (di->handleref)
|
g_hash_table_destroy (di->handleref);
|
if (di->tokens)
|
mono_g_hash_table_destroy (di->tokens);
|
if (di->remapped_tokens)
|
mono_g_hash_table_destroy (di->remapped_tokens);
|
if (di->generic_def_objects)
|
mono_g_hash_table_destroy (di->generic_def_objects);
|
if (di->blob_cache) {
|
g_hash_table_foreach (di->blob_cache, free_blob_cache_entry, NULL);
|
g_hash_table_destroy (di->blob_cache);
|
}
|
if (di->standalonesig_cache)
|
g_hash_table_destroy (di->standalonesig_cache);
|
for (list = di->array_methods; list; list = list->next) {
|
ArrayMethod *am = (ArrayMethod *)list->data;
|
mono_sre_array_method_free (am);
|
}
|
g_list_free (di->array_methods);
|
if (di->gen_params) {
|
for (i = 0; i < di->gen_params->len; i++) {
|
GenericParamTableEntry *entry = (GenericParamTableEntry *)g_ptr_array_index (di->gen_params, i);
|
mono_sre_generic_param_table_entry_free (entry);
|
}
|
g_ptr_array_free (di->gen_params, TRUE);
|
}
|
if (di->token_fixups)
|
mono_g_hash_table_destroy (di->token_fixups);
|
if (di->method_to_table_idx)
|
g_hash_table_destroy (di->method_to_table_idx);
|
if (di->field_to_table_idx)
|
g_hash_table_destroy (di->field_to_table_idx);
|
if (di->method_aux_hash)
|
g_hash_table_destroy (di->method_aux_hash);
|
if (di->vararg_aux_hash)
|
g_hash_table_destroy (di->vararg_aux_hash);
|
g_free (di->strong_name);
|
g_free (di->win32_res);
|
if (di->public_key)
|
g_free (di->public_key);
|
|
/*g_print ("string heap destroy for image %p\n", di);*/
|
mono_dynamic_stream_reset (&di->sheap);
|
mono_dynamic_stream_reset (&di->code);
|
mono_dynamic_stream_reset (&di->resources);
|
mono_dynamic_stream_reset (&di->us);
|
mono_dynamic_stream_reset (&di->blob);
|
mono_dynamic_stream_reset (&di->tstream);
|
mono_dynamic_stream_reset (&di->guid);
|
for (i = 0; i < MONO_TABLE_NUM; ++i) {
|
g_free (di->tables [i].values);
|
}
|
|
dynamic_images_lock ();
|
|
if (dynamic_images)
|
g_ptr_array_remove (dynamic_images, di);
|
|
dynamic_images_unlock ();
|
}
|
|
// Free dynamic image pass two: Free image itself (might never get called in some debug modes)
|
void
|
mono_dynamic_image_free_image (MonoDynamicImage *image)
|
{
|
g_free (image);
|
}
|
