5 #include <mono/metadata/appdomain.h>
6 #include <mono/metadata/metadata-internals.h>
7 #include <mono/metadata/marshal.h>
8 #include <mono/metadata/tabledefs.h>
10 #ifdef HAVE_VALGRIND_MEMCHECK_H
11 #include <valgrind/memcheck.h>
15 #include "debug-mini.h"
17 #ifdef MONO_ARCH_HAVE_IMT
20 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, gpointer *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method)
22 MonoObject *this_argument = mono_arch_find_this_argument (regs, method);
23 MonoVTable *vt = this_argument->vtable;
24 int displacement = slot - ((gpointer*)vt);
26 if (displacement > 0) {
27 /* slot is in the vtable, not in the IMT */
29 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
33 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
35 int imt_slot = MONO_IMT_SIZE + displacement;
37 mono_class_setup_vtable (vt->klass);
38 interface_offset = mono_class_interface_offset (vt->klass, imt_method->klass);
40 if (interface_offset < 0) {
41 g_print ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, 0), mono_type_get_name_full (&imt_method->klass->byval_arg, 0));
42 g_assert_not_reached ();
44 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
47 *impl_method = vt->klass->vtable [interface_offset + imt_method->slot];
49 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
50 method->klass->name_space, method->klass->name, method->name,
51 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
53 g_assert (imt_slot < MONO_IMT_SIZE);
54 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
55 int vtable_offset = interface_offset + imt_method->slot;
56 gpointer *vtable_slot = & (vt->vtable [vtable_offset]);
58 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, and colliding becomes %p[%d] (interface_offset = %d, method->slot = %d)\n", slot, imt_slot, vtable_slot, vtable_offset, interface_offset, imt_method->slot);
63 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
72 * mono_magic_trampoline:
74 * This trampoline handles calls from JITted code.
77 mono_magic_trampoline (gssize *regs, guint8 *code, MonoMethod *m, guint8* tramp)
80 gpointer *vtable_slot;
82 #if MONO_ARCH_COMMON_VTABLE_TRAMPOLINE
83 if (m == MONO_FAKE_VTABLE_METHOD) {
85 MonoVTable *vt = mono_arch_get_vcall_slot (code, (gpointer*)regs, &displacement);
87 if (displacement > 0) {
88 displacement -= G_STRUCT_OFFSET (MonoVTable, vtable);
89 g_assert (displacement >= 0);
90 displacement /= sizeof (gpointer);
92 /* Avoid loading metadata or creating a generic vtable if possible */
93 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, displacement);
94 if (addr && !vt->klass->valuetype) {
95 vtable_slot = mono_arch_get_vcall_slot_addr (code, (gpointer*)regs);
96 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
97 *vtable_slot = mono_get_addr_from_ftnptr (addr);
103 mono_class_setup_vtable (vt->klass);
104 m = vt->klass->vtable [displacement];
105 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
106 m = mono_marshal_get_synchronized_wrapper (m);
107 /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
109 /* We got here from an interface method: redirect to IMT handling */
110 m = MONO_FAKE_IMT_METHOD;
111 /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
115 /* this is the IMT trampoline */
116 #ifdef MONO_ARCH_HAVE_IMT
117 if (m == MONO_FAKE_IMT_METHOD) {
118 MonoMethod *impl_method;
119 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
120 * needs the signature to be able to find the this argument
122 m = mono_arch_find_imt_method ((gpointer*)regs, code);
123 vtable_slot = mono_arch_get_vcall_slot_addr (code, (gpointer*)regs);
124 g_assert (vtable_slot);
125 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, (gpointer*)regs, code, m, &impl_method);
126 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
127 * to be called, so we compile it and go ahead as usual.
129 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
134 addr = mono_compile_method (m);
137 mono_debugger_trampoline_compiled (m, addr);
139 /* the method was jumped to */
143 vtable_slot = mono_arch_get_vcall_slot_addr (code, (gpointer*)regs);
146 if (m->klass->valuetype)
147 addr = mono_arch_get_unbox_trampoline (m, addr);
149 g_assert (*vtable_slot);
151 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
152 #ifdef MONO_ARCH_HAVE_IMT
153 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, (gpointer*)regs, code, m, NULL);
155 *vtable_slot = mono_get_addr_from_ftnptr (addr);
159 guint8 *plt_entry = mono_aot_get_plt_entry (code);
161 /* Patch calling code */
163 mono_arch_patch_plt_entry (plt_entry, addr);
166 mono_jit_info_table_find (mono_domain_get (), (char*)code);
167 MonoJitInfo *target_ji =
168 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (addr));
170 if (mono_method_same_domain (ji, target_ji))
171 mono_arch_patch_callsite (code, addr);
179 * mono_aot_trampoline:
181 * This trampoline handles calls made from AOT code. We try to bypass the
182 * normal JIT compilation logic to avoid loading the metadata for the method.
184 #ifdef MONO_ARCH_HAVE_CREATE_TRAMPOLINE_FROM_TOKEN
186 mono_aot_trampoline (gssize *regs, guint8 *code, guint8 *token_info,
191 MonoMethod *method = NULL;
193 gpointer *vtable_slot;
194 gboolean is_got_entry;
196 image = *(gpointer*)(gpointer)token_info;
197 token_info += sizeof (gpointer);
198 token = *(guint32*)(gpointer)token_info;
200 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
202 method = mono_get_method (image, token, NULL);
205 //printf ("F: %s\n", mono_method_full_name (method, TRUE));
207 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
208 method = mono_marshal_get_synchronized_wrapper (method);
210 addr = mono_compile_method (method);
214 vtable_slot = mono_arch_get_vcall_slot_addr (code, (gpointer*)regs);
217 is_got_entry = mono_aot_is_got_entry (code, (guint8*)vtable_slot);
221 method = mono_get_method (image, token, NULL);
222 if (method->klass->valuetype)
223 addr = mono_arch_get_unbox_trampoline (method, addr);
226 /* This is a normal call through a PLT entry */
227 guint8 *plt_entry = mono_aot_get_plt_entry (code);
229 g_assert (plt_entry);
231 mono_arch_patch_plt_entry (plt_entry, addr);
233 is_got_entry = FALSE;
237 * Since AOT code is only used in the root domain,
238 * mono_domain_get () != mono_get_root_domain () means the calling method
239 * is AppDomain:InvokeInDomain, so this is the same check as in
240 * mono_method_same_domain () but without loading the metadata for the method.
242 if ((is_got_entry && (mono_domain_get () == mono_get_root_domain ())) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
243 #ifdef MONO_ARCH_HAVE_IMT
245 method = mono_get_method (image, token, NULL);
246 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, (gpointer*)regs, code, method, NULL);
255 * mono_aot_plt_trampoline:
257 * This trampoline handles calls made from AOT code through the PLT table.
260 mono_aot_plt_trampoline (gssize *regs, guint8 *code, guint8 *aot_module,
263 #ifdef MONO_ARCH_AOT_PLT_OFFSET_REG
264 guint32 plt_info_offset = regs [MONO_ARCH_AOT_PLT_OFFSET_REG];
266 guint32 plt_info_offset = -1;
269 return mono_aot_plt_resolve (aot_module, plt_info_offset, code);
274 * mono_class_init_trampoline:
276 * This method calls mono_runtime_class_init () to run the static constructor
277 * for the type, then patches the caller code so it is not called again.
280 mono_class_init_trampoline (gssize *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
282 guint8 *plt_entry = mono_aot_get_plt_entry (code);
284 mono_runtime_class_init (vtable);
286 if (!mono_running_on_valgrind ()) {
288 mono_arch_nullify_plt_entry (plt_entry);
290 mono_arch_nullify_class_init_trampoline (code, regs);
295 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
298 * mono_delegate_trampoline:
300 * This trampoline handles calls made to Delegate:Invoke ().
303 mono_delegate_trampoline (gssize *regs, guint8 *code, MonoClass *klass, guint8* tramp)
305 MonoDomain *domain = mono_domain_get ();
306 MonoDelegate *delegate;
309 MonoMethod *invoke, *m;
310 gboolean multicast, callvirt;
312 /* Find the Invoke method */
314 while ((invoke = mono_class_get_methods (klass, &iter))) {
315 if (!strcmp (invoke->name, "Invoke"))
320 /* Obtain the delegate object according to the calling convention */
322 delegate = mono_arch_get_this_arg_from_call (mono_method_signature (invoke), regs, code);
325 * If the called address is a trampoline, replace it with the compiled method so
326 * further calls don't have to go through the trampoline.
328 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
329 callvirt = !delegate->target && ji && mono_method_signature (ji->method)->hasthis;
330 if (ji && !callvirt) {
331 delegate->method_ptr = mono_compile_method (ji->method);
332 mono_debugger_trampoline_compiled (ji->method, delegate->method_ptr);
335 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
336 if (!multicast && !callvirt) {
337 code = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), delegate->target != NULL);
340 delegate->invoke_impl = code;
345 /* The general, unoptimized case */
346 m = mono_marshal_get_delegate_invoke (invoke, delegate);
347 delegate->invoke_impl = mono_compile_method (m);
348 mono_debugger_trampoline_compiled (m, delegate->invoke_impl);
350 return delegate->invoke_impl;