Make pdb2mdb work with files in other directories.
[mono.git] / mono / mini / mini-trampolines.c
index 7d5bcec2e22aba329f9f99cbcc3cd7b6a1e4af24..92a07726e83b16c1a2c4cb2dff0fc84a8949718a 100644 (file)
@@ -21,14 +21,14 @@ guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
 static GHashTable *class_init_hash_addr = NULL;
 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
-static guint32 trampoline_calls;
+static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
 
 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
 static CRITICAL_SECTION trampolines_mutex;
 
 static gpointer
-get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
+get_unbox_trampoline (MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
 {
        if (mono_aot_only) {
                if (need_rgctx_tramp)
@@ -40,7 +40,8 @@ get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer
                else
                        return mono_aot_get_unbox_trampoline (m);
        } else {
-               return mono_arch_get_unbox_trampoline (gsctx, m, addr);
+               unbox_trampolines ++;
+               return mono_arch_get_unbox_trampoline (m, addr);
        }
 }
 
@@ -133,6 +134,8 @@ mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
        g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
        mono_domain_unlock (domain);
 
+       static_rgctx_trampolines ++;
+
        return res;
 }
 #else
@@ -147,23 +150,15 @@ mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
 }
 #endif
 
-gpointer*
-mono_get_vcall_slot_addr (guint8* code, mgreg_t *regs)
-{
-       gpointer vt;
-       int displacement;
-       vt = mono_arch_get_vcall_slot (code, regs, &displacement);
-       if (!vt)
-               return NULL;
-       return (gpointer*)((char*)vt + displacement);
-}
-
 #ifdef MONO_ARCH_HAVE_IMT
 
+/*
+ * Either IMPL_METHOD or AOT_ADDR will be set on return.
+ */
 static gpointer*
-mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used)
+mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used, gpointer *aot_addr)
 {
-       MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (method), regs, code);
+       MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
        MonoVTable *vt = this_argument->vtable;
        int displacement = slot - ((gpointer*)vt);
 
@@ -175,6 +170,7 @@ mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *cod
                return slot;
        } else {
                MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
+               MonoMethod *impl;
                int interface_offset;
                int imt_slot = MONO_IMT_SIZE + displacement;
 
@@ -186,37 +182,42 @@ mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *cod
                }
                mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
 
-               if (impl_method) {
-                       MonoMethod *impl;
+               if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
+                       MonoGenericContext context = { NULL, NULL };
 
-                       if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
-                               MonoGenericContext context = { NULL, NULL };
+                       /* 
+                        * Generic virtual method, imt_method contains the inflated interface 
+                        * method, need to get the inflated impl method.
+                        */
+                       /* imt_method->slot might not be set */
+                       impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
 
-                               /* 
-                                * Generic virtual method, imt_method contains the inflated interface 
-                                * method, need to get the inflated impl method.
-                                */
-                               /* imt_method->slot might not be set */
-                               impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
-
-                               if (impl->klass->generic_class)
-                                       context.class_inst = impl->klass->generic_class->context.class_inst;
-                               context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
-                               impl = mono_class_inflate_generic_method (impl, &context);
-                       } else {
+                       if (impl->klass->generic_class)
+                               context.class_inst = impl->klass->generic_class->context.class_inst;
+                       context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
+                       impl = mono_class_inflate_generic_method (impl, &context);
+               } else {
+                       /* Avoid loading metadata or creating a generic vtable if possible */
+                       if (!vt->klass->valuetype)
+                               *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
+                       else
+                               *aot_addr = NULL;
+                       if (*aot_addr)
+                               impl = NULL;
+                       else
                                impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
-                       }
+               }
 
-                       if (mono_method_needs_static_rgctx_invoke (impl, FALSE))
-                               *need_rgctx_tramp = TRUE;
+               if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
+                       *need_rgctx_tramp = TRUE;
 
-                       *impl_method = impl;
+               *impl_method = impl;
 #if DEBUG_IMT
                printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
                                method->klass->name_space, method->klass->name, method->name, 
                                imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
 #endif
-               }
+
                g_assert (imt_slot < MONO_IMT_SIZE);
                if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
                        int slot = mono_method_get_vtable_index (imt_method);
@@ -271,87 +272,26 @@ is_generic_method_definition (MonoMethod *m)
  * from JITted and LLVM compiled code.
  */
 static gpointer
-common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
+common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
 {
        gpointer addr, compiled_method;
        gboolean generic_shared = FALSE;
-       MonoMethod *m;
        MonoMethod *declaring = NULL;
        MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
        int context_used;
        gboolean virtual, proxy = FALSE, variance_used = FALSE;
-       gpointer *orig_vtable_slot;
+       gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
        MonoJitInfo *ji = NULL;
 
-       /* The first case is for !llvm, the second is for llvm */
-       virtual = (arg == MONO_FAKE_VTABLE_METHOD) || ((gpointer)vtable_slot > (gpointer)vt);
-
-       m = arg;
+       virtual = (gpointer)vtable_slot > (gpointer)vt;
 
        orig_vtable_slot = vtable_slot;
+       vtable_slot_to_patch = vtable_slot;
 
-       if (m == MONO_FAKE_VTABLE_METHOD) {
-               int displacement;
-               if (!vt) {
-                       int i;
-                       MonoJitInfo *ji;
-
-                       ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
-                       if (ji)
-                               printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
-                       /* Print some debug info */
-                       for (i = 0; i < 32; ++i)
-                               printf ("0x%x ", code [-32 + i]);
-                       printf ("\n");
-                       g_assert (vt);
-               }
-               displacement = (guint8*)vtable_slot - (guint8*)vt;
-               if (displacement > 0) {
-                       int slot = (displacement - G_STRUCT_OFFSET (MonoVTable, vtable)) / sizeof (gpointer);
-                       g_assert (slot >= 0);
-
-                       /* Avoid loading metadata or creating a generic vtable if possible */
-                       addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
-                       if (addr)
-                               addr = mono_create_ftnptr (mono_domain_get (), addr);
-                       if (addr && !vt->klass->valuetype) {
-                               vtable_slot = mono_get_vcall_slot_addr (code, regs);
-                               if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
-                                       *vtable_slot = mono_get_addr_from_ftnptr (addr);
-                               }
-
-                               return addr;
-                       }
-
-                       /*
-                        * Bug #616463 (see
-                        * is_generic_method_definition() above) also
-                        * goes away if we do a
-                        * mono_class_setup_vtable (vt->klass) here,
-                        * because we then inflate the method
-                        * correctly, put it in the cache, and the
-                        * "wrong" inflation invocation still looks up
-                        * the correctly inflated method.
-                        *
-                        * The hack above seems more stable and
-                        * trustworthy.
-                        */
-                       m = mono_class_get_vtable_entry (vt->klass, slot);
-                       if (mono_method_needs_static_rgctx_invoke (m, FALSE))
-                               need_rgctx_tramp = TRUE;
-
-                       /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
-               } else {
-                       /* We got here from an interface method: redirect to IMT handling */
-                       m = MONO_FAKE_IMT_METHOD;
-                       /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
-               }
-       }
-
-       /* this is the IMT trampoline */
 #ifdef MONO_ARCH_HAVE_IMT
-       if (m == MONO_FAKE_IMT_METHOD) {
-               MonoMethod *impl_method;
+       /* IMT call */
+       if (vt && (gpointer)vtable_slot < (gpointer)vt) {
+               MonoMethod *impl_method = NULL;
                MonoObject *this_arg;
 
                /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
@@ -361,14 +301,18 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
                vtable_slot = orig_vtable_slot;
                g_assert (vtable_slot);
 
-               this_arg = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
+               this_arg = mono_arch_get_this_arg_from_call (regs, code);
 
                if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
                        /* Use the slow path for now */
                        proxy = TRUE;
                    m = mono_object_get_virtual_method (this_arg, m);
+                       vtable_slot_to_patch = NULL;
                } else {
-                       vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used);
+                       addr = NULL;
+                       vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
+                       /* This is the vcall slot which gets called through the IMT thunk */
+                       vtable_slot_to_patch = vtable_slot;
                        /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
                         * to be called, so we compile it and go ahead as usual.
                         */
@@ -380,6 +324,17 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
                        } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
                                variant_iface = m;
                        }
+
+                       if (addr && !generic_virtual && !variant_iface) {
+                               /*
+                                * We found AOT compiled code for the method, skip the rest.
+                                */
+                               if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
+                                       *vtable_slot = addr;
+
+                               return mono_create_ftnptr (mono_domain_get (), addr);
+                       }
+
                        m = impl_method;
                }
        }
@@ -444,7 +399,7 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
 #endif
                } else {
 #ifdef MONO_ARCH_HAVE_IMT
-                       MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
+                       MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
 
                        vt = this_argument->vtable;
                        vtable_slot = orig_vtable_slot;
@@ -511,8 +466,10 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
                        ji = NULL;
 
                /* Avoid recursion */
-               if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
+               if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED)) {
                        m = mono_marshal_get_synchronized_wrapper (m);
+                       need_rgctx_tramp = FALSE;
+               }
        }
 
        /* Calls made through delegates on platforms without delegate trampolines */
@@ -534,7 +491,7 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
                g_assert (vtable_slot);
 
                if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
-                       addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
+                       addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
 
                mono_method_add_generic_virtual_invocation (mono_domain_get (), 
                                                                                                        vt, vtable_slot,
@@ -574,16 +531,12 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
        vtable_slot = orig_vtable_slot;
 
        if (vtable_slot) {
-               gboolean variance_used = FALSE;
                if (m->klass->valuetype)
-                       addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
-               g_assert (*vtable_slot);
+                       addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
 
-               if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
-#ifdef MONO_ARCH_HAVE_IMT
-                       vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, NULL, &need_rgctx_tramp, &variance_used);
-#endif
-                       *vtable_slot = mono_get_addr_from_ftnptr (addr);
+               if (vtable_slot_to_patch && (mono_aot_is_got_entry (code, (guint8*)vtable_slot_to_patch) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot_to_patch))) {
+                       g_assert (*vtable_slot_to_patch);
+                       *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
                }
        }
        else {
@@ -602,9 +555,13 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
                        {
                                MonoJitInfo *target_ji = 
                                        mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
+                               if (!target_ji)
+                                       target_ji = mono_jit_info_table_find (mono_get_root_domain (), mono_get_addr_from_ftnptr (compiled_method));
 
                                if (!ji)
                                        ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
+                               if (!ji)
+                                       ji = mono_jit_info_table_find (mono_get_root_domain (), (char*)code);
 
                                if (mono_method_same_domain (ji, target_ji))
                                        mono_arch_patch_callsite (ji->code_start, code, addr);
@@ -618,43 +575,30 @@ common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp
 /**
  * mono_magic_trampoline:
  *
- *   This trampoline handles calls from JITted code.
+ *   This trampoline handles normal calls from JITted code.
  */
 gpointer
 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
 {
-       gpointer *vtable_slot;
-       int displacement;
-       MonoVTable *vt;
-
        trampoline_calls ++;
 
-       if (code && !mono_use_llvm)
-               vt = mono_arch_get_vcall_slot (code, regs, &displacement);
-       else
-               vt = NULL;
-       if (vt)
-               vtable_slot = (gpointer*)((char*)vt + displacement);
-       else
-               vtable_slot = NULL;
-
-       return common_call_trampoline (regs, code, arg, tramp, vt, vtable_slot, FALSE);
+       return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
 }
 
-#ifdef MONO_ARCH_LLVM_SUPPORTED
 /*
- * mono_llvm_vcall_trampoline:
+ * mono_vcall_trampoline:
  *
- *   This trampoline handles virtual calls when using LLVM.
+ *   This trampoline handles virtual calls.
  */
 static gpointer
-mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
+mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
 {
        MonoObject *this;
        MonoVTable *vt;
        gpointer *vtable_slot;
        MonoMethod *m;
-       gboolean need_rgctx_tramp;
+       gboolean need_rgctx_tramp = FALSE;
+       gpointer addr;
 
        trampoline_calls ++;
 
@@ -662,36 +606,61 @@ mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp
         * We need to obtain the following pieces of information:
         * - the method which needs to be compiled.
         * - the vtable slot.
-        * Since disassembly is impossible with LLVM, we use one vtable trampoline per
-        * vtable slot index, and obtain the method using this index + the this argument.
-        * This requires us to always pass this as the first argument, regardless of the
-        * signature.
+        * We use one vtable trampoline per vtable slot index, so we need only the vtable,
+        * the other two can be computed from the vtable + the slot index.
         */
 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
-       NOT_IMPLEMENTED;
+       /* All architectures should support this */
+       g_assert_not_reached ();
 #endif
 
-       this = mono_arch_get_this_arg_from_call (NULL, NULL, regs, code);
+       /*
+        * Obtain the vtable from the 'this' arg.
+        */
+       this = mono_arch_get_this_arg_from_call (regs, code);
        g_assert (this);
 
        vt = this->vtable;
 
-       if (slot < 0) {
-               m = MONO_FAKE_IMT_METHOD;
-               need_rgctx_tramp = FALSE;
-               vtable_slot = &(((gpointer*)vt) [slot]);
-       } else {
+       if (slot >= 0) {
+               /* Normal virtual call */
+               vtable_slot = &(vt->vtable [slot]);
+
+               /* Avoid loading metadata or creating a generic vtable if possible */
+               addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
+               if (addr && !vt->klass->valuetype) {
+                       if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
+                               *vtable_slot = addr;
+
+                       return mono_create_ftnptr (mono_domain_get (), addr);
+               }
 
-               m = mono_class_get_vtable_entry (this->vtable->klass, slot);
+               /*
+                * Bug #616463 (see
+                * is_generic_method_definition() above) also
+                * goes away if we do a
+                * mono_class_setup_vtable (vt->klass) here,
+                * because we then inflate the method
+                * correctly, put it in the cache, and the
+                * "wrong" inflation invocation still looks up
+                * the correctly inflated method.
+                *
+                * The hack above seems more stable and
+                * trustworthy.
+                */
+               m = mono_class_get_vtable_entry (vt->klass, slot);
 
                need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
+       } else {
+               /* IMT call */
+               vtable_slot = &(((gpointer*)vt) [slot]);
 
-               vtable_slot = &(vt->vtable [slot]);
+               m = NULL;
+               need_rgctx_tramp = FALSE;
        }
 
        return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
 }
-#endif
 
 gpointer
 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
@@ -745,7 +714,6 @@ mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
        guint32 token;
        MonoMethod *method = NULL;
        gpointer addr;
-       gpointer *vtable_slot;
        guint8 *plt_entry;
 
        trampoline_calls ++;
@@ -765,9 +733,6 @@ mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
 
        addr = mono_create_ftnptr (mono_domain_get (), addr);
 
-       vtable_slot = mono_get_vcall_slot_addr (code, regs);
-       g_assert (!vtable_slot);
-
        /* This is a normal call through a PLT entry */
        plt_entry = mono_aot_get_plt_entry (code);
        g_assert (plt_entry);
@@ -899,6 +864,7 @@ mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, gui
        MonoMethod *method = NULL;
        gboolean multicast, callvirt = FALSE;
        gboolean need_rgctx_tramp = FALSE;
+       gboolean enable_caching = TRUE;
        MonoMethod *invoke = tramp_data [0];
        guint8 *impl_this = tramp_data [1];
        guint8 *impl_nothis = tramp_data [2];
@@ -908,12 +874,7 @@ mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, gui
        trampoline_calls ++;
 
        /* Obtain the delegate object according to the calling convention */
-
-       /* 
-        * Avoid calling mono_get_generic_context_from_code () now since it is expensive, 
-        * get_this_arg_from_call will call it if needed.
-        */
-       delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
+       delegate = mono_arch_get_this_arg_from_call (regs, code);
 
        if (delegate->method) {
                method = delegate->method;
@@ -954,6 +915,13 @@ mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, gui
                        mono_error_raise_exception (&err);
 
                callvirt = !delegate->target && sig->hasthis;
+               if (delegate->target && 
+                       method->flags & METHOD_ATTRIBUTE_VIRTUAL && 
+                       method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
+                       method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
+                       method = mono_object_get_virtual_method (delegate->target, method);
+                       enable_caching = FALSE;
+               }
        }
 
        if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
@@ -968,13 +936,13 @@ mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, gui
         */
        if (method && !callvirt) {
                /* Avoid the overhead of looking up an already compiled method if possible */
-               if (delegate->method_code && *delegate->method_code) {
+               if (enable_caching && delegate->method_code && *delegate->method_code) {
                        delegate->method_ptr = *delegate->method_code;
                } else {
                        delegate->method_ptr = mono_compile_method (method);
                        if (need_rgctx_tramp)
                                delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
-                       if (delegate->method_code)
+                       if (enable_caching && delegate->method_code)
                                *delegate->method_code = delegate->method_ptr;
                        mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
                }
@@ -1017,7 +985,7 @@ mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tram
        MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
        gpointer resume_ip = jit_tls->handler_block_return_address;
 
-       memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
+       memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
        MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
 
        jit_tls->handler_block_return_address = NULL;
@@ -1099,10 +1067,8 @@ mono_get_trampoline_func (MonoTrampolineType tramp_type)
                return mono_monitor_enter_trampoline;
        case MONO_TRAMPOLINE_MONITOR_EXIT:
                return mono_monitor_exit_trampoline;
-#ifdef MONO_ARCH_LLVM_SUPPORTED
-       case MONO_TRAMPOLINE_LLVM_VCALL:
-               return mono_llvm_vcall_trampoline;
-#endif
+       case MONO_TRAMPOLINE_VCALL:
+               return mono_vcall_trampoline;
 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
        case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
                return mono_handler_block_guard_trampoline;
@@ -1121,7 +1087,9 @@ create_trampoline_code (MonoTrampolineType tramp_type)
 
        code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
        if (info) {
-               mono_save_trampoline_xdebug_info (info->name, info->code, info->code_size, info->unwind_ops);
+               mono_save_trampoline_xdebug_info (info);
+               if (mono_jit_map_is_enabled ())
+                       mono_emit_jit_tramp (info->code, info->code_size, info->name);
                mono_tramp_info_free (info);
        }
 
@@ -1152,15 +1120,16 @@ mono_trampolines_init (void)
        mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
        mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
        mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
-#ifdef MONO_ARCH_LLVM_SUPPORTED
-       mono_trampoline_code [MONO_TRAMPOLINE_LLVM_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_LLVM_VCALL);
-#endif
+       mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
        mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
        mono_create_handler_block_trampoline ();
 #endif
 
        mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
+       mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
+       mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
+       mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
 }
 
 void
@@ -1168,6 +1137,10 @@ mono_trampolines_cleanup (void)
 {
        if (class_init_hash_addr)
                g_hash_table_destroy (class_init_hash_addr);
+       if (rgctx_lazy_fetch_trampoline_hash)
+               g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
+       if (rgctx_lazy_fetch_trampoline_hash_addr)
+               g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
 
        DeleteCriticalSection (&trampolines_mutex);
 }
@@ -1230,6 +1203,7 @@ mono_create_generic_class_init_trampoline (void)
 {
 #ifdef MONO_ARCH_VTABLE_REG
        static gpointer code;
+       MonoTrampInfo *info;
 
        mono_trampolines_lock ();
 
@@ -1237,8 +1211,16 @@ mono_create_generic_class_init_trampoline (void)
                if (mono_aot_only)
                        /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
                        code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
-               else
-                       code = mono_arch_create_generic_class_init_trampoline (NULL, FALSE);
+               else {
+                       code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
+
+                       if (info) {
+                               mono_save_trampoline_xdebug_info (info);
+                               if (mono_jit_map_is_enabled ())
+                                       mono_emit_jit_tramp (info->code, info->code_size, info->name);
+                               mono_tramp_info_free (info);
+                       }
+               }
        }
 
        mono_trampolines_unlock ();
@@ -1318,7 +1300,7 @@ mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
        g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
        mono_domain_unlock (domain);
 
-       mono_jit_stats.method_trampolines++;
+       jit_trampolines++;
 
        return tramp;
 }      
@@ -1345,7 +1327,7 @@ mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
 
        tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
 
-       mono_jit_stats.method_trampolines++;
+       jit_trampolines++;
 
        return tramp;
 }      
@@ -1395,6 +1377,7 @@ mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
 {
        static gboolean inited = FALSE;
        static int num_trampolines = 0;
+       MonoTrampInfo *info;
 
        gpointer tramp, ptr;
 
@@ -1410,7 +1393,13 @@ mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
        if (tramp)
                return tramp;
 
-       tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, NULL, FALSE);
+       tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
+       if (info) {
+               mono_save_trampoline_xdebug_info (info);
+               if (mono_jit_map_is_enabled ())
+                       mono_emit_jit_tramp (info->code, info->code_size, info->name);
+               mono_tramp_info_free (info);
+       }
        ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
 
        mono_trampolines_lock ();
@@ -1437,6 +1426,7 @@ gpointer
 mono_create_monitor_enter_trampoline (void)
 {
        static gpointer code;
+       MonoTrampInfo *info;
 
        if (mono_aot_only) {
                if (!code)
@@ -1447,8 +1437,15 @@ mono_create_monitor_enter_trampoline (void)
 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
        mono_trampolines_lock ();
 
-       if (!code)
-               code = mono_arch_create_monitor_enter_trampoline (NULL, FALSE);
+       if (!code) {
+               code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
+               if (info) {
+                       mono_save_trampoline_xdebug_info (info);
+                       if (mono_jit_map_is_enabled ())
+                               mono_emit_jit_tramp (info->code, info->code_size, info->name);
+                       mono_tramp_info_free (info);
+               }
+       }
 
        mono_trampolines_unlock ();
 #else
@@ -1463,6 +1460,7 @@ gpointer
 mono_create_monitor_exit_trampoline (void)
 {
        static gpointer code;
+       MonoTrampInfo *info;
 
        if (mono_aot_only) {
                if (!code)
@@ -1473,8 +1471,15 @@ mono_create_monitor_exit_trampoline (void)
 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
        mono_trampolines_lock ();
 
-       if (!code)
-               code = mono_arch_create_monitor_exit_trampoline (NULL, FALSE);
+       if (!code) {
+               code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
+               if (info) {
+                       mono_save_trampoline_xdebug_info (info);
+                       if (mono_jit_map_is_enabled ())
+                               mono_emit_jit_tramp (info->code, info->code_size, info->name);
+                       mono_tramp_info_free (info);
+               }
+       }
 
        mono_trampolines_unlock ();
 #else
@@ -1485,41 +1490,6 @@ mono_create_monitor_exit_trampoline (void)
 }
  
 #ifdef MONO_ARCH_LLVM_SUPPORTED
-/*
- * mono_create_llvm_vcall_trampoline:
- *
- *  LLVM emits code for virtual calls which mono_get_vcall_slot is unable to
- * decode, i.e. only the final branch address is available:
- * mov <offset>(%rax), %rax
- * <random code inserted by instruction scheduling>
- * call *%rax
- *
- * To work around this problem, we don't use the common vtable trampoline when
- * llvm is enabled. Instead, we use one trampoline per method.
- */
-gpointer
-mono_create_llvm_vcall_trampoline (MonoMethod *method)
-{
-       MonoDomain *domain;
-       gpointer res;
-
-       domain = mono_domain_get ();
-
-       mono_domain_lock (domain);
-       res = g_hash_table_lookup (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method);
-       mono_domain_unlock (domain);
-       if (res)
-               return res;
-
-       res = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_LLVM_VCALL, domain, NULL);
-
-       mono_domain_lock (domain);
-       g_hash_table_insert (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method, res);
-       mono_domain_unlock (domain);
-
-       return res;
-}
-
 /*
  * mono_create_llvm_imt_trampoline:
  *
@@ -1572,3 +1542,51 @@ mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
        mono_trampolines_unlock ();
        return offset;
 }
+
+static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
+       "jit",
+       "jump",
+       "class_init",
+       "generic_class_init",
+       "rgctx_lazy_fetch",
+       "aot",
+       "aot_plt",
+       "delegate",
+       "restore_stack_prot",
+       "generic_virtual_remoting",
+       "monitor_enter",
+       "monitor_exit",
+       "vcall",
+#ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
+       "handler_block_guard"
+#endif
+};
+
+/*
+ * mono_get_generic_trampoline_name:
+ *
+ *   Returns a pointer to malloc-ed memory.
+ */
+char*
+mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
+{
+       return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
+}
+
+/*
+ * mono_get_rgctx_fetch_trampoline_name:
+ *
+ *   Returns a pointer to malloc-ed memory.
+ */
+char*
+mono_get_rgctx_fetch_trampoline_name (int slot)
+{
+       gboolean mrgctx;
+       int index;
+
+       mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
+       index = MONO_RGCTX_SLOT_INDEX (slot);
+
+       return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
+}
+