2 * mini-exceptions.c: generic exception support
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Mono Team (mono-list@lists.ximian.com)
8 * Copyright 2001-2003 Ximian, Inc.
9 * Copyright 2003-2008 Novell, Inc.
10 * Copyright 2011 Xamarin Inc (http://www.xamarin.com).
21 #ifdef HAVE_EXECINFO_H
25 #ifdef HAVE_SYS_TYPES_H
26 #include <sys/types.h>
29 #ifdef HAVE_SYS_WAIT_H
37 #ifdef HAVE_SYS_SYSCALL_H
38 #include <sys/syscall.h>
41 #ifdef HAVE_SYS_PRCTL_H
42 #include <sys/prctl.h>
49 #include <mono/metadata/appdomain.h>
50 #include <mono/metadata/tabledefs.h>
51 #include <mono/metadata/threads.h>
52 #include <mono/metadata/threads-types.h>
53 #include <mono/metadata/debug-helpers.h>
54 #include <mono/metadata/exception.h>
55 #include <mono/metadata/object-internals.h>
56 #include <mono/metadata/reflection-internals.h>
57 #include <mono/metadata/gc-internals.h>
58 #include <mono/metadata/mono-debug.h>
59 #include <mono/metadata/profiler.h>
60 #include <mono/metadata/mono-endian.h>
61 #include <mono/metadata/environment.h>
62 #include <mono/metadata/mono-mlist.h>
63 #include <mono/utils/mono-mmap.h>
64 #include <mono/utils/mono-logger-internals.h>
65 #include <mono/utils/mono-error.h>
66 #include <mono/utils/mono-error-internals.h>
70 #include "debugger-agent.h"
71 #include "seq-points.h"
72 #include "llvm-runtime.h"
73 #include "mini-llvm.h"
76 #include "mini-llvm-cpp.h"
79 #ifdef ENABLE_EXTENSION_MODULE
80 #include "../../../mono-extensions/mono/mini/mini-exceptions.c"
83 #ifndef MONO_ARCH_CONTEXT_DEF
84 #define MONO_ARCH_CONTEXT_DEF
87 static gpointer restore_context_func, call_filter_func;
88 static gpointer throw_exception_func, rethrow_exception_func;
89 static gpointer throw_corlib_exception_func;
91 static gpointer try_more_restore_tramp = NULL;
92 static gpointer restore_stack_protection_tramp = NULL;
94 static MonoUnhandledExceptionFunc unhandled_exception_hook = NULL;
95 static gpointer unhandled_exception_hook_data = NULL;
97 static void try_more_restore (void);
98 static void restore_stack_protection (void);
99 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
100 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
101 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
104 mono_exceptions_init (void)
106 MonoRuntimeExceptionHandlingCallbacks cbs;
108 restore_context_func = mono_aot_get_trampoline ("restore_context");
109 call_filter_func = mono_aot_get_trampoline ("call_filter");
110 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
111 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
115 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
116 mono_tramp_info_register (info, NULL);
117 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
118 mono_tramp_info_register (info, NULL);
119 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
120 mono_tramp_info_register (info, NULL);
121 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
122 mono_tramp_info_register (info, NULL);
124 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
125 if (!mono_llvm_only) {
126 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
127 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
131 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
132 mono_arch_exceptions_init ();
134 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
135 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
138 cbs.mono_raise_exception = mono_llvm_raise_exception;
140 cbs.mono_raise_exception = (void (*)(MonoException *))mono_get_throw_exception ();
141 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
142 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
143 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
144 mono_install_eh_callbacks (&cbs);
148 mono_get_throw_exception (void)
150 g_assert (throw_exception_func);
151 return throw_exception_func;
155 mono_get_rethrow_exception (void)
157 g_assert (rethrow_exception_func);
158 return rethrow_exception_func;
162 mono_get_call_filter (void)
164 g_assert (call_filter_func);
165 return call_filter_func;
169 mono_get_restore_context (void)
171 g_assert (restore_context_func);
172 return restore_context_func;
176 mono_get_throw_corlib_exception (void)
178 gpointer code = NULL;
181 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
182 if (throw_corlib_exception_func)
183 return throw_corlib_exception_func;
186 code = mono_aot_get_trampoline ("throw_corlib_exception");
188 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
189 mono_tramp_info_register (info, NULL);
192 mono_memory_barrier ();
194 throw_corlib_exception_func = code;
196 return throw_corlib_exception_func;
200 * mono_get_throw_exception_addr:
202 * Return an address which stores the result of
203 * mono_get_throw_exception.
206 mono_get_throw_exception_addr (void)
208 return &throw_exception_func;
212 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
214 MonoTryBlockHoleTableJitInfo *table;
219 if (ei->try_start > ip || ip >= ei->try_end)
222 if (!ji->has_try_block_holes)
225 table = mono_jit_info_get_try_block_hole_table_info (ji);
226 offset = (guint32)((char*)ip - (char*)ji->code_start);
227 clause = (guint16)(ei - ji->clauses);
228 g_assert (clause < ji->num_clauses);
230 for (i = 0; i < table->num_holes; ++i) {
231 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
232 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
238 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
241 static gboolean show_native_addresses = TRUE;
243 static gboolean show_native_addresses = FALSE;
246 static _Unwind_Reason_Code
247 build_stack_trace (struct _Unwind_Context *frame_ctx, void *state)
249 MonoDomain *domain = mono_domain_get ();
250 uintptr_t ip = _Unwind_GetIP (frame_ctx);
252 if (show_native_addresses || mono_jit_info_table_find (domain, (char*)ip)) {
253 GList **trace_ips = (GList **)state;
254 *trace_ips = g_list_prepend (*trace_ips, (gpointer)ip);
257 return _URC_NO_REASON;
261 get_unwind_backtrace (void)
265 _Unwind_Backtrace (build_stack_trace, &ips);
267 return g_slist_reverse (ips);
273 get_unwind_backtrace (void)
283 * Translate between the mono_arch_unwind_frame function and the old API.
286 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
287 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
289 StackFrameInfo frame;
292 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
294 /* Avoid costly table lookup during stack overflow */
295 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
298 ji = mini_jit_info_table_find (domain, (char *)ip, NULL);
303 err = mono_arch_unwind_frame (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
305 return (MonoJitInfo *)-1;
307 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
309 * Remove any unused lmf.
310 * Mask out the lower bits which might be used to hold additional information.
312 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
315 /* Convert between the new and the old APIs */
316 switch (frame.type) {
317 case FRAME_TYPE_MANAGED:
321 case FRAME_TYPE_TRAMPOLINE:
323 case FRAME_TYPE_MANAGED_TO_NATIVE:
327 memset (res, 0, sizeof (MonoJitInfo));
328 res->d.method = frame.method;
331 case FRAME_TYPE_DEBUGGER_INVOKE: {
335 * The normal exception handling code can't handle this frame, so just
338 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
339 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
343 g_assert_not_reached ();
348 /* mono_find_jit_info:
350 * This function is used to gather information from @ctx. It return the
351 * MonoJitInfo of the corresponding function, unwinds one stack frame and
352 * stores the resulting context into @new_ctx. It also stores a string
353 * describing the stack location into @trace (if not NULL), and modifies
354 * the @lmf if necessary. @native_offset return the IP offset from the
355 * start of the function or -1 if that info is not available.
358 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
359 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
363 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
365 MonoMethod *method = NULL;
376 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
378 if (ji == (gpointer)-1)
381 if (ji && !ji->is_trampoline)
382 method = jinfo_get_method (ji);
384 if (managed2 || (method && method->wrapper_type)) {
385 const char *real_ip, *start;
388 start = (const char *)ji->code_start;
390 /* ctx->ip points into native code */
391 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
393 real_ip = (const char*)ip;
395 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
396 offset = real_ip - start;
401 *native_offset = offset;
404 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
408 *trace = mono_debug_print_stack_frame (method, offset, domain);
411 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
412 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
421 * mono_find_jit_info_ext:
423 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
425 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
426 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
427 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
428 * to obtain the last managed frame.
429 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
430 * On return, it will be filled with the locations where callee saved registers are saved
431 * by the current frame. This is returned outside of StackFrameInfo because it can be
432 * quite large on some platforms.
433 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
437 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
438 MonoJitInfo *prev_ji, MonoContext *ctx,
439 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
440 mgreg_t **save_locations,
441 StackFrameInfo *frame)
444 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
446 MonoDomain *target_domain = domain;
447 MonoMethod *method = NULL;
448 gboolean async = mono_thread_info_is_async_context ();
453 /* Avoid costly table lookup during stack overflow */
454 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
457 ji = mini_jit_info_table_find (domain, (char *)ip, &target_domain);
460 target_domain = domain;
463 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
465 err = mono_arch_unwind_frame (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
469 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
471 * Remove any unused lmf.
472 * Mask out the lower bits which might be used to hold additional information.
474 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
477 if (frame->ji && !frame->ji->is_trampoline && !frame->ji->async)
478 method = jinfo_get_method (frame->ji);
480 if (frame->type == FRAME_TYPE_MANAGED && method) {
481 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
482 frame->managed = TRUE;
485 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
487 * This type of frame is just a marker, the caller should unwind once more to get the
488 * last managed frame.
491 frame->method = NULL;
494 frame->native_offset = -1;
495 frame->domain = target_domain;
496 frame->async_context = async;
500 if (frame->type == FRAME_TYPE_MANAGED)
501 frame->method = method;
503 if (ji && (frame->managed || (method && method->wrapper_type))) {
504 const char *real_ip, *start;
506 start = (const char *)ji->code_start;
507 if (frame->type == FRAME_TYPE_MANAGED)
508 real_ip = (const char*)ip;
510 /* ctx->ip points into native code */
511 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
513 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
514 frame->native_offset = real_ip - start;
516 frame->native_offset = -1;
520 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
522 if (trace && frame->method) {
523 char *fname = mono_method_full_name (frame->method, TRUE);
524 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
533 * This function is async-safe.
536 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
538 MonoGenericJitInfo *gi;
542 if (!ji->has_generic_jit_info)
544 gi = mono_jit_info_get_generic_jit_info (ji);
550 * Search location list if available, it contains the precise location of the
551 * argument for every pc offset, even if the method was interrupted while it was in
555 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
558 for (i = 0; i < gi->nlocs; ++i) {
559 MonoDwarfLocListEntry *entry = &gi->locations [i];
561 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
563 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
565 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
569 g_assert (i < gi->nlocs);
572 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
574 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
578 method = jinfo_get_method (ji);
579 if (mono_method_get_context (method)->method_inst) {
580 /* A MonoMethodRuntimeGenericContext* */
582 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
586 /* Avoid returning a managed object */
587 MonoObject *this_obj = (MonoObject *)info;
589 return this_obj->vtable;
594 * generic_info is either a MonoMethodRuntimeGenericContext or a MonoVTable.
596 static MonoGenericContext
597 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
599 MonoGenericContext context = { NULL, NULL };
600 MonoClass *klass, *method_container_class;
603 g_assert (generic_info);
605 method = jinfo_get_method (ji);
606 g_assert (method->is_inflated);
607 if (mono_method_get_context (method)->method_inst) {
608 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext *)generic_info;
610 klass = mrgctx->class_vtable->klass;
611 context.method_inst = mrgctx->method_inst;
612 g_assert (context.method_inst);
614 MonoVTable *vtable = (MonoVTable *)generic_info;
616 klass = vtable->klass;
619 //g_assert (!method->klass->generic_container);
620 if (method->klass->generic_class)
621 method_container_class = method->klass->generic_class->container_class;
623 method_container_class = method->klass;
625 /* class might refer to a subclass of method's class */
626 while (!(klass == method->klass || (klass->generic_class && klass->generic_class->container_class == method_container_class))) {
627 klass = klass->parent;
631 if (klass->generic_class || klass->generic_container)
632 context.class_inst = mini_class_get_context (klass)->class_inst;
634 if (klass->generic_class)
635 g_assert (mono_class_has_parent_and_ignore_generics (klass->generic_class->container_class, method_container_class));
637 g_assert (mono_class_has_parent_and_ignore_generics (klass, method_container_class));
643 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
646 MonoGenericContext context;
649 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
650 return jinfo_get_method (ji);
651 context = get_generic_context_from_stack_frame (ji, generic_info);
653 method = jinfo_get_method (ji);
654 method = mono_method_get_declaring_generic_method (method);
655 method = mono_class_inflate_generic_method_checked (method, &context, &error);
656 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
662 * mono_exception_walk_native_trace:
663 * @ex: The exception object whose frames should be walked
664 * @func: callback to call for each stack frame
665 * @user_data: data passed to the callback
667 * This function walks the stacktrace of an exception. For
668 * each frame the callback function is called with the relevant info.
669 * The walk ends when no more stack frames are found or when the callback
670 * returns a TRUE value.
674 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
676 MonoDomain *domain = mono_domain_get ();
677 MonoArray *ta = ex->trace_ips;
683 len = mono_array_length (ta) >> 1;
684 for (i = 0; i < len; i++) {
685 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
686 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
687 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *)ip);
690 if (func (NULL, ip, 0, FALSE, user_data))
693 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
694 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
703 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
706 MonoDomain *domain = mono_domain_get ();
708 MonoArray *ta = exc->trace_ips;
709 MonoDebugSourceLocation *location;
713 /* Exception is not thrown yet */
714 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
717 len = mono_array_length (ta) >> 1;
719 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
721 for (i = skip; i < len; i++) {
723 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
724 mono_error_raise_exception (&error);
725 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
726 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
729 ji = mono_jit_info_table_find (domain, (char *)ip);
731 /* Unmanaged frame */
732 mono_array_setref (res, i, sf);
736 g_assert (ji != NULL);
739 /* Can't resolve actual method */
740 method = jinfo_get_method (ji);
742 method = get_method_from_stack_frame (ji, generic_info);
743 if (jinfo_get_method (ji)->wrapper_type) {
747 s = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_REFLECTION);
748 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
752 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
753 mono_error_raise_exception (&error);
754 MONO_OBJECT_SETREF (sf, method, rm);
757 sf->method_index = ji->from_aot ? mono_aot_find_method_index (method) : 0xffffff;
758 sf->method_address = (gsize) ji->code_start;
759 sf->native_offset = (char *)ip - (char *)ji->code_start;
762 * mono_debug_lookup_source_location() returns both the file / line number information
763 * and the IL offset. Note that computing the IL offset is already an expensive
764 * operation, so we shouldn't call this method twice.
766 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
768 sf->il_offset = location->il_offset;
771 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
772 sf->il_offset = sp.il_offset;
777 if (need_file_info) {
778 if (location && location->source_file) {
779 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
780 sf->line = location->row;
781 sf->column = location->column;
783 sf->line = sf->column = 0;
788 mono_debug_free_source_location (location);
789 mono_array_setref (res, i, sf);
796 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
799 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
800 if (jit_tls && jit_tls->orig_ex_ctx_set)
801 start_ctx = &jit_tls->orig_ex_ctx;
803 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
806 * mono_walk_stack_with_ctx:
808 * Unwind the current thread starting at @start_ctx.
810 * If @start_ctx is null, we capture the current context.
813 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
815 MonoContext extra_ctx;
816 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
817 MONO_ARCH_CONTEXT_DEF
819 if (!thread || !thread->jit_data)
823 mono_arch_flush_register_windows ();
825 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
826 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
828 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
830 start_ctx = &extra_ctx;
833 mono_walk_stack_full (func, start_ctx, mono_domain_get (), (MonoJitTlsData *)thread->jit_data, mono_get_lmf (), unwind_options, user_data);
837 * mono_walk_stack_with_state:
839 * Unwind a thread described by @state.
841 * State must be valid (state->valid == TRUE).
843 * If you are using this function to unwind another thread, make sure it is suspended.
845 * If @state is null, we capture the current context.
848 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
850 MonoThreadUnwindState extra_state;
852 g_assert (!mono_thread_info_is_async_context ());
853 if (!mono_thread_state_init_from_current (&extra_state))
855 state = &extra_state;
858 g_assert (state->valid);
860 if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
864 mono_walk_stack_full (func,
866 (MonoDomain *)state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
867 (MonoJitTlsData *)state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
868 (MonoLMF *)state->unwind_data [MONO_UNWIND_DATA_LMF],
869 unwind_options, user_data);
873 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
875 MonoThreadUnwindState state;
876 if (!mono_thread_state_init_from_current (&state))
878 mono_walk_stack_with_state (func, &state, options, user_data);
882 * mono_walk_stack_full:
883 * @func: callback to call for each stack frame
884 * @domain: starting appdomain, can be NULL to use the current domain
885 * @unwind_options: what extra information the unwinder should gather
886 * @start_ctx: starting state of the stack walk, can be NULL.
887 * @thread: the thread whose stack to walk, can be NULL to use the current thread
888 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
889 * @user_data: data passed to the callback
891 * This function walks the stack of a thread, starting from the state
892 * represented by start_ctx. For each frame the callback
893 * function is called with the relevant info. The walk ends when no more
894 * managed stack frames are found or when the callback returns a TRUE value.
897 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
900 MonoContext ctx, new_ctx;
901 StackFrameInfo frame;
903 mgreg_t *reg_locations [MONO_MAX_IREGS];
904 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
905 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
906 gboolean async = mono_thread_info_is_async_context ();
908 if (mono_llvm_only) {
914 ips = get_unwind_backtrace ();
915 for (l = ips; l; l = l->next) {
916 guint8 *ip = (guint8*)l->data;
917 memset (&frame, 0, sizeof (StackFrameInfo));
918 frame.ji = mini_jit_info_table_find (domain, (char*)ip, &frame.domain);
919 if (!frame.ji || frame.ji->is_trampoline)
921 frame.type = FRAME_TYPE_MANAGED;
922 frame.method = jinfo_get_method (frame.ji);
923 // FIXME: Cannot lookup the actual method
924 frame.actual_method = frame.method;
925 if (frame.type == FRAME_TYPE_MANAGED) {
926 if (!frame.method->wrapper_type || frame.method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
927 frame.managed = TRUE;
929 frame.native_offset = ip - (guint8*)frame.ji->code_start;
930 frame.il_offset = -1;
932 if (func (&frame, NULL, user_data))
939 g_assert (start_ctx);
942 /*The LMF will be null if the target have no managed frames.*/
943 /* g_assert (lmf); */
946 g_assert (unwind_options == MONO_UNWIND_NONE);
948 memcpy (&ctx, start_ctx, sizeof (MonoContext));
949 memset (reg_locations, 0, sizeof (reg_locations));
951 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
953 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
957 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji && !frame.ji->is_trampoline) {
958 MonoDebugSourceLocation *source;
960 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
962 il_offset = source->il_offset;
965 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
966 il_offset = sp.il_offset;
970 mono_debug_free_source_location (source);
974 frame.il_offset = il_offset;
976 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji && !frame.ji->is_trampoline) {
977 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
979 frame.actual_method = frame.method;
982 if (get_reg_locations)
983 frame.reg_locations = reg_locations;
985 if (func (&frame, &ctx, user_data))
988 if (get_reg_locations) {
989 for (i = 0; i < MONO_MAX_IREGS; ++i)
990 if (new_reg_locations [i])
991 reg_locations [i] = new_reg_locations [i];
999 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
1000 MonoReflectionMethod **method,
1001 gint32 *iloffset, gint32 *native_offset,
1002 MonoString **file, gint32 *line, gint32 *column)
1005 MonoDomain *domain = mono_domain_get ();
1006 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1007 MonoLMF *lmf = mono_get_lmf ();
1008 MonoJitInfo *ji = NULL;
1009 MonoContext ctx, new_ctx;
1010 MonoDebugSourceLocation *location;
1011 MonoMethod *jmethod = NULL, *actual_method;
1012 StackFrameInfo frame;
1015 MONO_ARCH_CONTEXT_DEF;
1017 if (mono_llvm_only) {
1019 MonoDomain *frame_domain;
1020 guint8 *frame_ip = NULL;
1022 /* FIXME: Generalize this code with an interface which returns an array of StackFrame structures */
1024 ips = get_unwind_backtrace ();
1025 for (l = ips; l && skip >= 0; l = l->next) {
1026 guint8 *ip = (guint8*)l->data;
1030 ji = mini_jit_info_table_find (mono_domain_get (), (char*)ip, &frame_domain);
1031 if (!ji || ji->is_trampoline)
1034 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1035 jmethod = jinfo_get_method (ji);
1036 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1043 /* No way to resolve generic instances */
1044 actual_method = jmethod;
1045 *native_offset = frame_ip - (guint8*)ji->code_start;
1047 mono_arch_flush_register_windows ();
1049 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
1050 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
1052 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
1058 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1062 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1063 frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1064 frame.type == FRAME_TYPE_TRAMPOLINE)
1068 *native_offset = frame.native_offset;
1070 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1071 jmethod = jinfo_get_method (ji);
1072 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1075 } while (skip >= 0);
1077 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
1080 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, actual_method, NULL, &error);
1081 mono_error_raise_exception (&error);
1082 mono_gc_wbarrier_generic_store (method, (MonoObject*) rm);
1084 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
1086 *iloffset = location->il_offset;
1090 if (need_file_info) {
1092 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
1093 *line = location->row;
1094 *column = location->column;
1097 *line = *column = 0;
1101 mono_debug_free_source_location (location);
1107 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1109 MonoClass *catch_class = ei->data.catch_class;
1110 MonoType *inflated_type;
1111 MonoGenericContext context;
1113 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1114 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1117 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1119 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1121 /* FIXME: we shouldn't inflate but instead put the
1122 type in the rgctx and fetch it from there. It
1123 might be a good idea to do this lazily, i.e. only
1124 when the exception is actually thrown, so as not to
1125 waste space for exception clauses which might never
1127 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1128 catch_class = mono_class_from_mono_type (inflated_type);
1129 mono_metadata_free_type (inflated_type);
1135 * mini_jit_info_table_find_ext:
1137 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1138 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1139 * OUT_DOMAIN if it is not NULL.
1142 mini_jit_info_table_find_ext (MonoDomain *domain, char *addr, gboolean allow_trampolines, MonoDomain **out_domain)
1145 MonoInternalThread *t = mono_thread_internal_current ();
1151 ji = mono_jit_info_table_find_internal (domain, addr, TRUE, allow_trampolines);
1154 *out_domain = domain;
1158 /* maybe it is shared code, so we also search in the root domain */
1159 if (domain != mono_get_root_domain ()) {
1160 ji = mono_jit_info_table_find_internal (mono_get_root_domain (), addr, TRUE, allow_trampolines);
1163 *out_domain = mono_get_root_domain ();
1171 refs = (gpointer *)((t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL);
1172 for (; refs && *refs; refs++) {
1173 if (*refs != domain && *refs != mono_get_root_domain ()) {
1174 ji = mono_jit_info_table_find_internal ((MonoDomain*) *refs, addr, TRUE, allow_trampolines);
1177 *out_domain = (MonoDomain*) *refs;
1187 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1189 return mini_jit_info_table_find_ext (domain, addr, FALSE, out_domain);
1193 * wrap_non_exception_throws:
1195 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1196 * WrapNonExceptionThrows flag set.
1199 wrap_non_exception_throws (MonoMethod *m)
1201 MonoAssembly *ass = m->klass->image->assembly;
1202 MonoCustomAttrInfo* attrs;
1203 static MonoClass *klass;
1205 gboolean val = FALSE;
1208 if (ass->wrap_non_exception_throws_inited)
1209 return ass->wrap_non_exception_throws;
1211 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1213 attrs = mono_custom_attrs_from_assembly (ass);
1215 for (i = 0; i < attrs->num_attrs; ++i) {
1216 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1218 int num_named, named_type, name_len;
1221 if (!attr->ctor || attr->ctor->klass != klass)
1223 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1224 p = (const char*)attr->data;
1225 g_assert (read16 (p) == 0x0001);
1227 num_named = read16 (p);
1233 /* data_type = *p; */
1236 if (named_type != 0x54)
1238 name_len = mono_metadata_decode_blob_size (p, &p);
1239 name = (char *)g_malloc (name_len + 1);
1240 memcpy (name, p, name_len);
1241 name [name_len] = 0;
1243 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1245 /* The value is a BOOLEAN */
1248 mono_custom_attrs_free (attrs);
1251 ass->wrap_non_exception_throws = val;
1252 mono_memory_barrier ();
1253 ass->wrap_non_exception_throws_inited = TRUE;
1258 #ifndef MONO_ARCH_STACK_GROWS_UP
1259 #define DOES_STACK_GROWS_UP 1
1261 #define DOES_STACK_GROWS_UP 0
1264 #define MAX_UNMANAGED_BACKTRACE 128
1266 build_native_trace (void)
1268 /* This puppy only makes sense on mobile, IOW, ARM. */
1269 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1271 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1272 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1277 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1279 for (i = 0; i < size; i++)
1280 mono_array_set (res, gpointer, i, native_trace [i]);
1288 setup_stack_trace (MonoException *mono_ex, GSList *dynamic_methods, MonoArray *initial_trace_ips, GList **trace_ips)
1290 if (mono_ex && !initial_trace_ips) {
1291 *trace_ips = g_list_reverse (*trace_ips);
1292 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (*trace_ips, mono_defaults.int_class));
1293 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ());
1294 if (dynamic_methods) {
1295 /* These methods could go away anytime, so save a reference to them in the exception object */
1297 MonoMList *list = NULL;
1299 for (l = dynamic_methods; l; l = l->next) {
1301 MonoDomain *domain = mono_domain_get ();
1303 if (domain->method_to_dyn_method) {
1304 mono_domain_lock (domain);
1305 dis_link = (guint32)(size_t)g_hash_table_lookup (domain->method_to_dyn_method, l->data);
1306 mono_domain_unlock (domain);
1308 MonoObject *o = mono_gchandle_get_target (dis_link);
1310 list = mono_mlist_prepend (list, o);
1316 MONO_OBJECT_SETREF (mono_ex, dynamic_methods, list);
1319 g_list_free (*trace_ips);
1324 * mono_handle_exception_internal_first_pass:
1326 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1327 * OBJ is found. Run the index of the filter clause which caught the exception into
1328 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1331 mono_handle_exception_internal_first_pass (MonoContext *ctx, MonoObject *obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1333 MonoDomain *domain = mono_domain_get ();
1334 MonoJitInfo *ji = NULL;
1335 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1336 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1337 MonoLMF *lmf = mono_get_lmf ();
1338 MonoArray *initial_trace_ips = NULL;
1339 GList *trace_ips = NULL;
1340 GSList *dynamic_methods = NULL;
1341 MonoException *mono_ex;
1342 gboolean stack_overflow = FALSE;
1343 MonoContext initial_ctx;
1345 int frame_count = 0;
1350 g_assert (ctx != NULL);
1352 if (obj == (MonoObject *)domain->stack_overflow_ex)
1353 stack_overflow = TRUE;
1355 mono_ex = (MonoException*)obj;
1356 initial_trace_ips = mono_ex->trace_ips;
1358 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1359 mono_ex = (MonoException*)obj;
1360 initial_trace_ips = mono_ex->trace_ips;
1366 call_filter = (int (*) (MonoContext *, void *))mono_get_call_filter ();
1368 g_assert (jit_tls->end_of_stack);
1369 g_assert (jit_tls->abort_func);
1372 *out_filter_idx = -1;
1376 *out_prev_ji = NULL;
1381 MonoContext new_ctx;
1383 int clause_index_start = 0;
1384 gboolean unwind_res = TRUE;
1386 StackFrameInfo frame;
1391 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1393 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1394 frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1395 frame.type == FRAME_TYPE_TRAMPOLINE) {
1399 g_assert (frame.type == FRAME_TYPE_MANAGED);
1404 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1405 g_slist_free (dynamic_methods);
1410 method = jinfo_get_method (ji);
1411 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1413 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1414 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1415 "The native frame called the managed method:\n%s\n",
1416 mono_method_full_name (method, TRUE));
1419 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1421 * Avoid overwriting the stack trace if the exception is
1422 * rethrown. Also avoid giant stack traces during a stack
1425 if (!initial_trace_ips && (frame_count < 1000)) {
1426 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1427 trace_ips = g_list_prepend (trace_ips,
1428 get_generic_info_from_stack_frame (ji, ctx));
1432 if (method->dynamic)
1433 dynamic_methods = g_slist_prepend (dynamic_methods, method);
1435 if (stack_overflow) {
1436 if (DOES_STACK_GROWS_UP)
1437 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1439 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1441 free_stack = 0xffffff;
1444 for (i = clause_index_start; i < ji->num_clauses; i++) {
1445 MonoJitExceptionInfo *ei = &ji->clauses [i];
1446 gboolean filtered = FALSE;
1449 * During stack overflow, wait till the unwinding frees some stack
1450 * space before running handlers/finalizers.
1452 if (free_stack <= (64 * 1024))
1455 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1457 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1460 * Have to unwrap RuntimeWrappedExceptions if the
1461 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1463 if (non_exception && !wrap_non_exception_throws (method))
1464 ex_obj = non_exception;
1468 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1469 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1470 #ifndef DISABLE_PERFCOUNTERS
1471 mono_perfcounters->exceptions_filters++;
1474 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1475 trim the stackframe since if it returns FALSE we lose information.
1477 FIXME Not 100% sure if it's a good idea even with user clauses.
1480 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1482 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1484 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1486 /* Can't pass the ex object in a register yet to filter clauses, because call_filter () might not support it */
1487 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1489 g_assert (!ji->from_llvm);
1490 /* store the exception object in bp + ei->exvar_offset */
1491 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1494 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1496 * Pass the original il clause index to the landing pad so it can
1497 * branch to the landing pad associated with the il clause.
1498 * This is needed because llvm compiled code assumes that the EH
1499 * code always branches to the innermost landing pad.
1502 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1505 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1506 filtered = call_filter (ctx, ei->data.filter);
1507 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1508 if (filtered && out_filter_idx)
1509 *out_filter_idx = filter_idx;
1516 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1517 g_slist_free (dynamic_methods);
1518 /* mono_debugger_agent_handle_exception () needs this */
1519 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1524 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1525 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1526 g_slist_free (dynamic_methods);
1531 /* mono_debugger_agent_handle_exception () needs this */
1532 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1541 g_assert_not_reached ();
1545 * mono_handle_exception_internal:
1546 * @ctx: saved processor state
1547 * @obj: the exception object
1548 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1551 mono_handle_exception_internal (MonoContext *ctx, MonoObject *obj, gboolean resume, MonoJitInfo **out_ji)
1554 MonoDomain *domain = mono_domain_get ();
1555 MonoJitInfo *ji, *prev_ji;
1556 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1557 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1558 MonoLMF *lmf = mono_get_lmf ();
1559 MonoException *mono_ex;
1560 gboolean stack_overflow = FALSE;
1561 MonoContext initial_ctx;
1563 int frame_count = 0;
1564 gint32 filter_idx, first_filter_idx = 0;
1567 MonoObject *non_exception = NULL;
1569 g_assert (ctx != NULL);
1571 MonoException *ex = mono_get_exception_null_reference ();
1572 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1573 obj = (MonoObject *)ex;
1577 * Allocate a new exception object instead of the preconstructed ones.
1579 if (obj == (MonoObject *)domain->stack_overflow_ex) {
1581 * It is not a good idea to try and put even more pressure on the little stack available.
1582 * obj = mono_get_exception_stack_overflow ();
1584 stack_overflow = TRUE;
1586 else if (obj == (MonoObject *)domain->null_reference_ex) {
1587 obj = (MonoObject *)mono_get_exception_null_reference ();
1590 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1591 non_exception = obj;
1592 obj = (MonoObject *)mono_get_exception_runtime_wrapped (obj);
1595 mono_ex = (MonoException*)obj;
1597 if (mini_get_debug_options ()->suspend_on_exception) {
1598 mono_runtime_printf_err ("Exception thrown, suspending...");
1603 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1604 mono_ex = (MonoException*)obj;
1609 if (mono_ex && jit_tls->class_cast_from) {
1610 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1611 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1612 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1613 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1614 mono_ex->message = mono_string_new (domain, msg);
1619 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1620 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1621 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1622 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1623 mono_ex->message = mono_string_new (domain, msg);
1631 call_filter = (int (*)(MonoContext *, void*))mono_get_call_filter ();
1633 g_assert (jit_tls->end_of_stack);
1634 g_assert (jit_tls->abort_func);
1637 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1638 * end up being TRUE on any code path.
1640 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1645 MonoContext ctx_cp = *ctx;
1646 if (mono_trace_is_enabled ()) {
1647 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1648 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1649 MonoObject *message;
1650 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1652 if (get_message == NULL) {
1654 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1656 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1658 MonoObject *exc = NULL;
1659 message = mono_runtime_try_invoke (get_message, obj, NULL, &exc, &error);
1660 g_assert (exc == NULL);
1661 mono_error_assert_ok (&error);
1664 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1666 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)mono_native_thread_id_get (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1668 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1669 mono_print_thread_dump_from_ctx (ctx);
1671 jit_tls->orig_ex_ctx_set = TRUE;
1672 mono_profiler_exception_thrown (obj);
1673 jit_tls->orig_ex_ctx_set = FALSE;
1675 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1678 if (mini_get_debug_options ()->break_on_exc)
1680 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1682 if (mini_get_debug_options ()->suspend_on_unhandled) {
1683 mono_runtime_printf_err ("Unhandled exception, suspending...");
1688 // FIXME: This runs managed code so it might cause another stack overflow when
1689 // we are handling a stack overflow
1690 mono_unhandled_exception (obj);
1692 gboolean unhandled = FALSE;
1695 * The exceptions caught by the mono_runtime_invoke_checked () calls
1696 * in the threadpool needs to be treated as unhandled (#669836).
1698 * FIXME: The check below is hackish, but its hard to distinguish
1699 * these runtime invoke calls from others in the runtime.
1701 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1702 if (prev_ji && jinfo_get_method (prev_ji) == mono_defaults.threadpool_perform_wait_callback_method)
1707 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1709 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, &ctx_cp);
1719 MonoContext new_ctx;
1721 int clause_index_start = 0;
1722 gboolean unwind_res = TRUE;
1726 ji = jit_tls->resume_state.ji;
1727 new_ctx = jit_tls->resume_state.new_ctx;
1728 clause_index_start = jit_tls->resume_state.clause_index;
1729 lmf = jit_tls->resume_state.lmf;
1730 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1731 filter_idx = jit_tls->resume_state.filter_idx;
1733 StackFrameInfo frame;
1735 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1737 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1738 frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1739 frame.type == FRAME_TYPE_TRAMPOLINE) {
1743 g_assert (frame.type == FRAME_TYPE_MANAGED);
1749 *(mono_get_lmf_addr ()) = lmf;
1751 jit_tls->abort_func (obj);
1752 g_assert_not_reached ();
1755 method = jinfo_get_method (ji);
1757 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1759 if (stack_overflow) {
1760 if (DOES_STACK_GROWS_UP)
1761 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1763 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1765 free_stack = 0xffffff;
1768 for (i = clause_index_start; i < ji->num_clauses; i++) {
1769 MonoJitExceptionInfo *ei = &ji->clauses [i];
1770 gboolean filtered = FALSE;
1773 * During stack overflow, wait till the unwinding frees some stack
1774 * space before running handlers/finalizers.
1776 if (free_stack <= (64 * 1024))
1779 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1781 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1784 * Have to unwrap RuntimeWrappedExceptions if the
1785 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1787 if (non_exception && !wrap_non_exception_throws (method))
1788 ex_obj = non_exception;
1792 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1793 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1794 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1796 g_assert (!ji->from_llvm);
1797 /* store the exception object in bp + ei->exvar_offset */
1798 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1802 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1804 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1807 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1809 * Filter clauses should only be run in the
1810 * first pass of exception handling.
1812 filtered = (filter_idx == first_filter_idx);
1816 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1817 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1819 * This guards against the situation that we abort a thread that is executing a finally clause
1820 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1821 * check for this situation here and resume interruption if we are below the guarded block.
1823 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1824 gboolean is_outside = FALSE;
1825 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1826 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1827 //FIXME make this stack direction aware
1828 if (catch_bp > prot_bp) {
1830 } else if (catch_bp == prot_bp) {
1831 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1832 * So we check if the catch handler_start is protected by the guarded handler protected region
1835 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1836 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1837 * There aren't any further finally/fault handler blocks down the stack over this exception.
1838 * This must be ensured by the code that installs the guard trampoline.
1840 g_assert (ji == mini_jit_info_table_find (domain, (char *)MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1842 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1847 jit_tls->handler_block_return_address = NULL;
1848 jit_tls->handler_block = NULL;
1849 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1853 if (mono_trace_is_enabled () && mono_trace_eval (method))
1854 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1855 jit_tls->orig_ex_ctx_set = TRUE;
1856 mono_profiler_exception_clause_handler (method, ei->flags, i);
1857 jit_tls->orig_ex_ctx_set = FALSE;
1858 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1860 #ifndef DISABLE_PERFCOUNTERS
1861 mono_perfcounters->exceptions_depth += frame_count;
1863 if (obj == (MonoObject *)domain->stack_overflow_ex)
1864 jit_tls->handling_stack_ovf = FALSE;
1868 if (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
1869 if (mono_trace_is_enabled () && mono_trace_eval (method))
1870 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1871 jit_tls->orig_ex_ctx_set = TRUE;
1872 mono_profiler_exception_clause_handler (method, ei->flags, i);
1873 jit_tls->orig_ex_ctx_set = FALSE;
1874 call_filter (ctx, ei->handler_start);
1876 if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
1877 if (mono_trace_is_enabled () && mono_trace_eval (method))
1878 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1879 jit_tls->orig_ex_ctx_set = TRUE;
1880 mono_profiler_exception_clause_handler (method, ei->flags, i);
1881 jit_tls->orig_ex_ctx_set = FALSE;
1882 #ifndef DISABLE_PERFCOUNTERS
1883 mono_perfcounters->exceptions_finallys++;
1886 if (ji->from_llvm) {
1888 * LLVM compiled finally handlers follow the design
1889 * of the c++ ehabi, i.e. they call a resume function
1890 * at the end instead of returning to the caller.
1891 * So save the exception handling state,
1892 * mono_resume_unwind () will call us again to continue
1895 jit_tls->resume_state.ex_obj = obj;
1896 jit_tls->resume_state.ji = ji;
1897 jit_tls->resume_state.clause_index = i + 1;
1898 jit_tls->resume_state.ctx = *ctx;
1899 jit_tls->resume_state.new_ctx = new_ctx;
1900 jit_tls->resume_state.lmf = lmf;
1901 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1902 jit_tls->resume_state.filter_idx = filter_idx;
1903 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1906 call_filter (ctx, ei->handler_start);
1912 jit_tls->orig_ex_ctx_set = TRUE;
1913 mono_profiler_exception_method_leave (method);
1914 jit_tls->orig_ex_ctx_set = FALSE;
1919 g_assert_not_reached ();
1923 * mono_debugger_run_finally:
1924 * @start_ctx: saved processor state
1926 * This method is called by the Mono Debugger to call all `finally' clauses of the
1927 * current stack frame. It's used when the user issues a `return' command to make
1928 * the current stack frame return. After returning from this method, the debugger
1929 * unwinds the stack one frame and gives control back to the user.
1931 * NOTE: This method is only used when running inside the Mono Debugger.
1934 mono_debugger_run_finally (MonoContext *start_ctx)
1936 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1937 MonoDomain *domain = mono_domain_get ();
1938 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1939 MonoLMF *lmf = mono_get_lmf ();
1940 MonoContext ctx, new_ctx;
1941 MonoJitInfo *ji, rji;
1946 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1947 if (!ji || ji == (gpointer)-1)
1951 call_filter = (int (*)(MonoContext *, void *))mono_get_call_filter ();
1953 for (i = 0; i < ji->num_clauses; i++) {
1954 MonoJitExceptionInfo *ei = &ji->clauses [i];
1956 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1957 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1958 call_filter (&ctx, ei->handler_start);
1964 * mono_handle_exception:
1965 * @ctx: saved processor state
1966 * @obj: the exception object
1969 mono_handle_exception (MonoContext *ctx, MonoObject *obj)
1971 #ifndef DISABLE_PERFCOUNTERS
1972 mono_perfcounters->exceptions_thrown++;
1975 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1978 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1980 #ifndef MONO_ARCH_USE_SIGACTION
1981 #error "Can't use sigaltstack without sigaction"
1984 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
1987 mono_setup_altstack (MonoJitTlsData *tls)
1991 guint8 *staddr = NULL;
1993 if (mono_running_on_valgrind ())
1996 mono_thread_info_get_stack_bounds (&staddr, &stsize);
2000 tls->end_of_stack = staddr + stsize;
2001 tls->stack_size = stsize;
2003 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2005 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2006 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2008 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2010 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2011 /* mprotect can fail for the main thread stack */
2012 gpointer gaddr = mono_valloc (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON|MONO_MMAP_FIXED);
2013 g_assert (gaddr == tls->stack_ovf_guard_base);
2014 tls->stack_ovf_valloced = TRUE;
2017 /* Setup an alternate signal stack */
2018 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
2019 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2021 g_assert (tls->signal_stack);
2023 sa.ss_sp = tls->signal_stack;
2024 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2026 g_assert (sigaltstack (&sa, NULL) == 0);
2028 mono_gc_register_altstack ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size, (char*)staddr + stsize - ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size), tls->signal_stack, tls->signal_stack_size);
2032 mono_free_altstack (MonoJitTlsData *tls)
2037 sa.ss_sp = tls->signal_stack;
2038 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2039 sa.ss_flags = SS_DISABLE;
2040 err = sigaltstack (&sa, NULL);
2041 g_assert (err == 0);
2043 if (tls->signal_stack)
2044 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
2045 if (tls->stack_ovf_valloced)
2046 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
2048 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2051 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2054 mono_setup_altstack (MonoJitTlsData *tls)
2059 mono_free_altstack (MonoJitTlsData *tls)
2063 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2066 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2068 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2069 /* we need to leave some room for throwing the exception */
2070 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2071 unprotect_size -= mono_pagesize ();
2072 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2073 * is sufficient stack
2075 //fprintf (stderr, "restoring stack protection: %p-%p (%d)\n", jit_tls->stack_ovf_guard_base, (char*)jit_tls->stack_ovf_guard_base + unprotect_size, unprotect_size);
2077 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2078 return unprotect_size == jit_tls->stack_ovf_guard_size;
2081 static G_GNUC_UNUSED void
2082 try_more_restore (void)
2084 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2085 if (try_restore_stack_protection (jit_tls, 500))
2086 jit_tls->restore_stack_prot = NULL;
2089 static G_GNUC_UNUSED void
2090 restore_stack_protection (void)
2092 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2093 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2094 /* if we can't restore the stack protection, keep a callback installed so
2095 * we'll try to restore as much stack as we can at each return from unmanaged
2098 if (try_restore_stack_protection (jit_tls, 4096))
2099 jit_tls->restore_stack_prot = NULL;
2101 jit_tls->restore_stack_prot = try_more_restore_tramp;
2102 /* here we also throw a stack overflow exception */
2103 ex->trace_ips = NULL;
2104 ex->stack_trace = NULL;
2105 mono_raise_exception (ex);
2109 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2111 void (*func)(void) = (void (*)(void))tramp_data;
2117 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *siginfo, guint8* fault_addr)
2122 /* we got a stack overflow in the soft-guard pages
2123 * There are two cases:
2124 * 1) managed code caused the overflow: we unprotect the soft-guard page
2125 * and let the arch-specific code trigger the exception handling mechanism
2126 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2127 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2128 * and hope we can continue with those enabled, at least until the hard-guard page
2129 * is hit. The alternative to continuing here is to just print a message and abort.
2130 * We may add in the future the code to protect the pages again in the codepath
2131 * when we return from unmanaged to managed code.
2133 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2134 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2135 /* we unprotect the minimum amount we can */
2137 gboolean handled = FALSE;
2139 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2140 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2141 guard_size -= mono_pagesize ();
2143 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2144 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2145 mono_mprotect ((char*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size - guard_size, guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2146 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2148 mono_arch_handle_altstack_exception (ctx, siginfo, fault_addr, TRUE);
2153 /* We print a message: after this even managed stack overflows
2154 * may crash the runtime
2156 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2157 if (!jit_tls->handling_stack_ovf) {
2158 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2159 jit_tls->handling_stack_ovf = 1;
2161 /*fprintf (stderr, "Already handling stack overflow\n");*/
2170 MonoMethod *omethod;
2172 } PrintOverflowUserData;
2174 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2176 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2178 MonoMethod *method = NULL;
2179 PrintOverflowUserData *user_data = (PrintOverflowUserData *)data;
2182 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2183 method = jinfo_get_method (frame->ji);
2186 if (user_data->count == 0) {
2187 /* The first frame is in its prolog, so a line number cannot be computed */
2188 user_data->count ++;
2192 /* If this is a one method overflow, skip the other instances */
2193 if (method == user_data->omethod)
2196 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2197 mono_runtime_printf_err (" %s", location);
2200 if (user_data->count == 1) {
2201 mono_runtime_printf_err (" <...>");
2202 user_data->omethod = method;
2204 user_data->omethod = NULL;
2207 user_data->count ++;
2209 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2216 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2218 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2219 PrintOverflowUserData ud;
2223 /* we don't do much now, but we can warn the user with a useful message */
2224 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2226 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2227 mono_sigctx_to_monoctx (ctx, &mctx);
2229 mono_runtime_printf_err ("Stacktrace:");
2231 memset (&ud, 0, sizeof (ud));
2233 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2235 if (ji && !ji->is_trampoline && jinfo_get_method (ji))
2236 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2238 mono_runtime_printf_err ("At <unmanaged>.");
2245 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2247 MonoMethod *method = NULL;
2249 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2250 method = jinfo_get_method (frame->ji);
2253 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2254 mono_runtime_printf_err (" %s", location);
2257 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2262 static G_GNUC_UNUSED gboolean
2263 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2265 GString *p = (GString*)data;
2266 MonoMethod *method = NULL;
2268 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2269 method = jinfo_get_method (frame->ji);
2271 if (method && frame->domain) {
2272 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
2273 g_string_append_printf (p, " %s\n", location);
2276 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2281 #ifndef MONO_CROSS_COMPILE
2283 static gboolean handling_sigsegv = FALSE;
2286 * mono_handle_native_sigsegv:
2288 * Handle a SIGSEGV received while in native code by printing diagnostic
2289 * information and aborting.
2292 mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2294 #ifdef MONO_ARCH_USE_SIGACTION
2295 struct sigaction sa;
2297 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2298 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2300 if (handling_sigsegv)
2303 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2304 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2315 /* To prevent infinite loops when the stack walk causes a crash */
2316 handling_sigsegv = TRUE;
2318 /* !jit_tls means the thread was not registered with the runtime */
2319 if (jit_tls && mono_thread_internal_current ()) {
2320 mono_runtime_printf_err ("Stacktrace:\n");
2322 /* FIXME: Is MONO_UNWIND_LOOKUP_IL_OFFSET correct here? */
2323 mono_walk_stack (print_stack_frame_to_stderr, MONO_UNWIND_LOOKUP_IL_OFFSET, NULL);
2326 #ifdef HAVE_BACKTRACE_SYMBOLS
2332 mono_runtime_printf_err ("\nNative stacktrace:\n");
2334 size = backtrace (array, 256);
2335 names = backtrace_symbols (array, size);
2336 for (i =0; i < size; ++i) {
2337 mono_runtime_printf_err ("\t%s", names [i]);
2341 /* Try to get more meaningful information using gdb */
2343 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2344 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2345 /* From g_spawn_command_line_sync () in eglib */
2348 pid_t crashed_pid = getpid ();
2352 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2353 * it will deadlock. Call the syscall directly instead.
2355 pid = mono_runtime_syscall_fork ();
2356 #if defined (HAVE_PRCTL) && defined(PR_SET_PTRACER)
2358 // Allow gdb to attach to the process even if ptrace_scope sysctl variable is set to
2359 // a value other than 0 (the most permissive ptrace scope). Most modern Linux
2360 // distributions set the scope to 1 which allows attaching only to direct children of
2361 // the current process
2362 prctl (PR_SET_PTRACER, pid, 0, 0, 0);
2366 dup2 (STDERR_FILENO, STDOUT_FILENO);
2368 mono_gdb_render_native_backtraces (crashed_pid);
2372 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2373 waitpid (pid, &status, 0);
2377 #elif defined (ENABLE_EXTENSION_MODULE)
2378 mono_extension_handle_native_sigsegv (ctx, info);
2382 * A SIGSEGV indicates something went very wrong so we can no longer depend
2383 * on anything working. So try to print out lots of diagnostics, starting
2384 * with ones which have a greater chance of working.
2386 mono_runtime_printf_err (
2388 "=================================================================\n"
2389 "Got a %s while executing native code. This usually indicates\n"
2390 "a fatal error in the mono runtime or one of the native libraries \n"
2391 "used by your application.\n"
2392 "=================================================================\n",
2396 #ifdef MONO_ARCH_USE_SIGACTION
2398 /* Remove our SIGABRT handler */
2399 sa.sa_handler = SIG_DFL;
2400 sigemptyset (&sa.sa_mask);
2403 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2407 if (!mono_do_crash_chaining) {
2408 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2409 #if defined (PLATFORM_ANDROID)
2420 mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2422 g_assert_not_reached ();
2425 #endif /* !MONO_CROSS_COMPILE */
2428 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2430 MonoInternalThread *thread = mono_thread_internal_current ();
2431 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2439 GError *error = NULL;
2444 text = g_string_new (0);
2446 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2448 g_string_append_printf (text, "\n\"%s\"", name);
2451 else if (thread->threadpool_thread)
2452 g_string_append (text, "\n\"<threadpool thread>\"");
2454 g_string_append (text, "\n\"<unnamed thread>\"");
2457 wapi_desc = wapi_current_thread_desc ();
2458 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2462 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2464 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2466 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2468 mono_sigctx_to_monoctx (sigctx, &ctx);
2470 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2472 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2475 mono_runtime_printf ("%s", text->str);
2477 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2478 OutputDebugStringA(text->str);
2481 g_string_free (text, TRUE);
2482 mono_runtime_stdout_fflush ();
2486 * mono_print_thread_dump:
2488 * Print information about the current thread to stdout.
2489 * SIGCTX can be NULL, allowing this to be called from gdb.
2492 mono_print_thread_dump (void *sigctx)
2494 mono_print_thread_dump_internal (sigctx, NULL);
2498 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2500 mono_print_thread_dump_internal (NULL, ctx);
2504 * mono_resume_unwind:
2506 * This is called by a trampoline from LLVM compiled finally clauses to continue
2510 mono_resume_unwind (MonoContext *ctx)
2512 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2513 MonoContext new_ctx;
2515 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2516 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2519 mono_handle_exception_internal (&new_ctx, (MonoObject *)jit_tls->resume_state.ex_obj, TRUE, NULL);
2521 mono_restore_context (&new_ctx);
2524 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2529 MonoJitExceptionInfo *ei;
2530 } FindHandlerBlockData;
2533 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2537 FindHandlerBlockData *pdata = (FindHandlerBlockData *)data;
2538 MonoJitInfo *ji = frame->ji;
2543 ip = MONO_CONTEXT_GET_IP (ctx);
2545 for (i = 0; i < ji->num_clauses; ++i) {
2546 MonoJitExceptionInfo *ei = ji->clauses + i;
2547 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2549 /*If ip points to the first instruction it means the handler block didn't start
2550 so we can leave its execution to the EH machinery*/
2551 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2563 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2566 MonoJitExceptionInfo *clause = NULL;
2569 ip = MONO_CONTEXT_GET_IP (ctx);
2571 for (i = 0; i < ji->num_clauses; ++i) {
2572 clause = &ji->clauses [i];
2573 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2575 if (clause->handler_start < ip && clause->data.handler_end > ip)
2579 /*no matching finally */
2580 if (i == ji->num_clauses)
2583 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2584 if (ip == clause->handler_start)
2587 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2591 * Finds the bottom handler block running and install a block guard if needed.
2592 * FIXME add full-aot support.
2595 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2597 FindHandlerBlockData data = { 0 };
2598 MonoJitTlsData *jit_tls = (MonoJitTlsData *)ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2605 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2606 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2608 if (!jit_tls || jit_tls->handler_block_return_address)
2611 /* Do an async safe stack walk */
2612 mono_thread_info_set_is_async_context (TRUE);
2613 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2614 mono_thread_info_set_is_async_context (FALSE);
2619 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2621 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2622 if (resume_ip == NULL)
2625 jit_tls->handler_block_return_address = resume_ip;
2626 jit_tls->handler_block = data.ei;
2633 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2641 mono_set_cast_details (MonoClass *from, MonoClass *to)
2643 MonoJitTlsData *jit_tls = NULL;
2645 if (mini_get_debug_options ()->better_cast_details) {
2646 jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2647 jit_tls->class_cast_from = from;
2648 jit_tls->class_cast_to = to;
2653 /*returns false if the thread is not attached*/
2655 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2657 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2658 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2666 mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
2668 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2669 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2670 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2673 mono_thread_state_init (ctx);
2676 if (!ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] || !ctx->unwind_data [MONO_UNWIND_DATA_LMF])
2682 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2688 mono_thread_state_init (MonoThreadUnwindState *ctx)
2690 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2692 #if defined(MONO_CROSS_COMPILE)
2693 ctx->valid = FALSE; //A cross compiler doesn't need to suspend.
2694 #elif MONO_ARCH_HAS_MONO_CONTEXT
2695 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2697 g_error ("Use a null sigctx requires a working mono-context");
2700 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2701 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2702 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread ? thread->jit_data : NULL;
2708 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2710 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2717 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2718 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2719 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2724 /*returns false if the thread is not attached*/
2726 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2728 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2729 MONO_ARCH_CONTEXT_DEF
2731 mono_arch_flush_register_windows ();
2733 if (!thread || !thread->jit_data) {
2737 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2738 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2740 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2743 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2744 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2745 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2751 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2753 mono_handle_exception (ctx, (MonoObject *)exc);
2754 mono_restore_context (ctx);
2757 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2759 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2761 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2762 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2763 jit_tls->ex_ctx = *ctx;
2765 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2767 g_error ("This target doesn't support mono_arch_setup_async_callback");
2772 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2774 unhandled_exception_hook = func;
2775 unhandled_exception_hook_data = user_data;
2779 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2781 if (unhandled_exception_hook) {
2782 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2784 MonoObject *other = NULL;
2785 MonoString *str = mono_object_to_string (exc, &other);
2789 msg = mono_string_to_utf8 (str);
2791 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2792 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2794 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2795 original_backtrace, nested_backtrace);
2797 g_free (original_backtrace);
2798 g_free (nested_backtrace);
2800 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2802 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2804 #if defined(HOST_IOS)
2805 g_assertion_message ("Terminating runtime due to unhandled exception");
2807 exit (mono_environment_exitcode_get ());
2811 g_assert_not_reached ();
2815 * mono_restore_context:
2817 * Call the architecture specific restore context function.
2820 mono_restore_context (MonoContext *ctx)
2822 static void (*restore_context) (MonoContext *);
2824 if (!restore_context)
2825 restore_context = (void (*)(MonoContext *))mono_get_restore_context ();
2826 restore_context (ctx);
2827 g_assert_not_reached ();
2831 * mono_jinfo_get_unwind_info:
2833 * Return the unwind info for JI.
2836 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2839 return mono_aot_get_unwind_info (ji, unwind_info_len);
2841 return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
2845 mono_jinfo_get_epilog_size (MonoJitInfo *ji)
2847 MonoArchEHJitInfo *info;
2849 info = mono_jit_info_get_arch_eh_info (ji);
2852 return info->epilog_size;
2856 * LLVM/Bitcode exception handling.
2860 throw_exception (MonoObject *ex, gboolean rethrow)
2862 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
2863 MonoException *mono_ex;
2865 if (!mono_object_isinst (ex, mono_defaults.exception_class))
2866 mono_ex = mono_get_exception_runtime_wrapped (ex);
2868 mono_ex = (MonoException*)ex;
2871 jit_tls->thrown_exc = mono_gchandle_new ((MonoObject*)mono_ex, FALSE);
2874 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
2875 GList *l, *ips = NULL;
2878 _Unwind_Backtrace (build_stack_trace, &ips);
2879 /* The list contains ip-gshared info pairs */
2881 ips = g_list_reverse (ips);
2882 for (l = ips; l; l = l->next) {
2883 trace = g_list_append (trace, l->data);
2884 trace = g_list_append (trace, NULL);
2886 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (trace, mono_defaults.int_class));
2888 g_list_free (trace);
2892 mono_llvm_cpp_throw_exception ();
2896 mono_llvm_throw_exception (MonoObject *ex)
2898 throw_exception (ex, FALSE);
2902 mono_llvm_rethrow_exception (MonoObject *ex)
2904 throw_exception (ex, TRUE);
2908 mono_llvm_raise_exception (MonoException *e)
2910 mono_llvm_throw_exception ((MonoObject*)e);
2914 mono_llvm_throw_corlib_exception (guint32 ex_token_index)
2916 guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
2919 ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
2921 mono_llvm_throw_exception ((MonoObject*)ex);
2925 * mono_llvm_resume_exception:
2927 * Resume exception propagation.
2930 mono_llvm_resume_exception (void)
2932 mono_llvm_cpp_throw_exception ();
2936 * mono_llvm_load_exception:
2938 * Return the currently thrown exception.
2941 mono_llvm_load_exception (void)
2943 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
2945 MonoException *mono_ex = (MonoException*)mono_gchandle_get_target (jit_tls->thrown_exc);
2947 if (mono_ex->trace_ips) {
2948 GList *trace_ips = NULL;
2949 gpointer ip = __builtin_return_address (0);
2951 size_t upper = mono_array_length (mono_ex->trace_ips);
2953 for (int i = 0; i < upper; i+= 2) {
2954 gpointer curr_ip = mono_array_get (mono_ex->trace_ips, gpointer, i);
2955 gpointer curr_info = mono_array_get (mono_ex->trace_ips, gpointer, i + 1);
2956 trace_ips = g_list_append (trace_ips, curr_ip);
2957 trace_ips = g_list_append (trace_ips, curr_info);
2963 // FIXME: Does this work correctly for rethrows?
2964 // We may be discarding useful information
2965 // when this gets GC'ed
2966 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (trace_ips, mono_defaults.int_class));
2967 g_list_free (trace_ips);
2970 //MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex));
2972 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_array_new (mono_domain_get (), mono_defaults.int_class, 0));
2973 MONO_OBJECT_SETREF (mono_ex, stack_trace, mono_array_new (mono_domain_get (), mono_defaults.stack_frame_class, 0));
2976 return &mono_ex->object;
2980 * mono_llvm_clear_exception:
2982 * Mark the currently thrown exception as handled.
2985 mono_llvm_clear_exception (void)
2987 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
2988 mono_gchandle_free (jit_tls->thrown_exc);
2989 jit_tls->thrown_exc = 0;
2991 mono_memory_barrier ();
2995 * mono_llvm_match_exception:
2997 * Return the innermost clause containing REGION_START-REGION_END which can handle
2998 * the current exception.
3001 mono_llvm_match_exception (MonoJitInfo *jinfo, guint32 region_start, guint32 region_end, gpointer rgctx, MonoObject *this_obj)
3003 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3007 g_assert (jit_tls->thrown_exc);
3008 exc = mono_gchandle_get_target (jit_tls->thrown_exc);
3009 for (int i = 0; i < jinfo->num_clauses; i++) {
3010 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
3011 MonoClass *catch_class;
3013 if (! (ei->try_offset == region_start && ei->try_offset + ei->try_len == region_end) )
3016 catch_class = ei->data.catch_class;
3017 if (catch_class->byval_arg.type == MONO_TYPE_VAR || catch_class->byval_arg.type == MONO_TYPE_MVAR || catch_class->byval_arg.type == MONO_TYPE_GENERICINST) {
3018 MonoGenericContext context;
3019 MonoType *inflated_type;
3021 g_assert (rgctx || this_obj);
3022 context = get_generic_context_from_stack_frame (jinfo, rgctx ? rgctx : this_obj->vtable);
3023 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
3024 catch_class = mono_class_from_mono_type (inflated_type);
3025 mono_metadata_free_type (inflated_type);
3028 // FIXME: Handle edge cases handled in get_exception_catch_class
3029 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (exc, catch_class)) {
3030 index = ei->clause_index;
3032 } else if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3033 g_assert_not_reached ();
3042 mono_debug_personality (int a, _Unwind_Action b,
3043 uint64_t c, struct _Unwind_Exception *d, struct _Unwind_Context *e)
3045 g_assert_not_reached ();
3049 mono_debug_personality (void);
3052 mono_debug_personality (void)
3054 g_assert_not_reached ();