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).
11 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
22 #ifdef HAVE_EXECINFO_H
26 #ifdef HAVE_SYS_TYPES_H
27 #include <sys/types.h>
30 #ifdef HAVE_SYS_WAIT_H
38 #ifdef HAVE_SYS_SYSCALL_H
39 #include <sys/syscall.h>
42 #ifdef HAVE_SYS_PRCTL_H
43 #include <sys/prctl.h>
50 #include <mono/metadata/appdomain.h>
51 #include <mono/metadata/tabledefs.h>
52 #include <mono/metadata/threads.h>
53 #include <mono/metadata/threads-types.h>
54 #include <mono/metadata/debug-helpers.h>
55 #include <mono/metadata/exception.h>
56 #include <mono/metadata/exception-internals.h>
57 #include <mono/metadata/object-internals.h>
58 #include <mono/metadata/reflection-internals.h>
59 #include <mono/metadata/gc-internals.h>
60 #include <mono/metadata/mono-debug.h>
61 #include <mono/metadata/profiler.h>
62 #include <mono/metadata/mono-endian.h>
63 #include <mono/metadata/environment.h>
64 #include <mono/metadata/mono-mlist.h>
65 #include <mono/utils/mono-mmap.h>
66 #include <mono/utils/mono-logger-internals.h>
67 #include <mono/utils/mono-error.h>
68 #include <mono/utils/mono-error-internals.h>
72 #include "debugger-agent.h"
73 #include "seq-points.h"
74 #include "llvm-runtime.h"
75 #include "mini-llvm.h"
78 #include "mini-llvm-cpp.h"
81 #ifndef MONO_ARCH_CONTEXT_DEF
82 #define MONO_ARCH_CONTEXT_DEF
85 static gpointer restore_context_func, call_filter_func;
86 static gpointer throw_exception_func, rethrow_exception_func;
87 static gpointer throw_corlib_exception_func;
89 static gpointer try_more_restore_tramp = NULL;
90 static gpointer restore_stack_protection_tramp = NULL;
92 static void try_more_restore (void);
93 static void restore_stack_protection (void);
94 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
95 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
96 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
97 static gboolean mono_current_thread_has_handle_block_guard (void);
100 mono_exceptions_init (void)
102 MonoRuntimeExceptionHandlingCallbacks cbs;
104 restore_context_func = mono_aot_get_trampoline ("restore_context");
105 call_filter_func = mono_aot_get_trampoline ("call_filter");
106 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
107 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
111 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
112 mono_tramp_info_register (info, NULL);
113 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
114 mono_tramp_info_register (info, NULL);
115 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
116 mono_tramp_info_register (info, NULL);
117 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
118 mono_tramp_info_register (info, NULL);
120 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
121 if (!mono_llvm_only) {
122 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
123 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
127 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
128 mono_arch_exceptions_init ();
130 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
131 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
134 cbs.mono_raise_exception = mono_llvm_raise_exception;
136 cbs.mono_raise_exception = (void (*)(MonoException *))mono_get_throw_exception ();
137 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
138 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
139 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
140 cbs.mono_current_thread_has_handle_block_guard = mono_current_thread_has_handle_block_guard;
141 mono_install_eh_callbacks (&cbs);
145 mono_get_throw_exception (void)
147 g_assert (throw_exception_func);
148 return throw_exception_func;
152 mono_get_rethrow_exception (void)
154 g_assert (rethrow_exception_func);
155 return rethrow_exception_func;
159 mono_get_call_filter (void)
161 g_assert (call_filter_func);
162 return call_filter_func;
166 mono_get_restore_context (void)
168 g_assert (restore_context_func);
169 return restore_context_func;
173 mono_get_throw_corlib_exception (void)
175 gpointer code = NULL;
178 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
179 if (throw_corlib_exception_func)
180 return throw_corlib_exception_func;
183 code = mono_aot_get_trampoline ("throw_corlib_exception");
185 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
186 mono_tramp_info_register (info, NULL);
189 mono_memory_barrier ();
191 throw_corlib_exception_func = code;
193 return throw_corlib_exception_func;
197 * mono_get_throw_exception_addr:
199 * Return an address which stores the result of
200 * mono_get_throw_exception.
203 mono_get_throw_exception_addr (void)
205 return &throw_exception_func;
209 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
211 MonoTryBlockHoleTableJitInfo *table;
216 if (ei->try_start > ip || ip >= ei->try_end)
219 if (!ji->has_try_block_holes)
222 table = mono_jit_info_get_try_block_hole_table_info (ji);
223 offset = (guint32)((char*)ip - (char*)ji->code_start);
224 clause = (guint16)(ei - ji->clauses);
225 g_assert (clause < ji->num_clauses);
227 for (i = 0; i < table->num_holes; ++i) {
228 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
229 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
235 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
238 static gboolean show_native_addresses = TRUE;
240 static gboolean show_native_addresses = FALSE;
243 static _Unwind_Reason_Code
244 build_stack_trace (struct _Unwind_Context *frame_ctx, void *state)
246 MonoDomain *domain = mono_domain_get ();
247 uintptr_t ip = _Unwind_GetIP (frame_ctx);
249 if (show_native_addresses || mono_jit_info_table_find (domain, (char*)ip)) {
250 GList **trace_ips = (GList **)state;
251 *trace_ips = g_list_prepend (*trace_ips, (gpointer)ip);
254 return _URC_NO_REASON;
258 get_unwind_backtrace (void)
262 _Unwind_Backtrace (build_stack_trace, &ips);
264 return g_slist_reverse (ips);
270 get_unwind_backtrace (void)
280 * Translate between the mono_arch_unwind_frame function and the old API.
283 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
284 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
286 StackFrameInfo frame;
289 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
291 /* Avoid costly table lookup during stack overflow */
292 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
295 ji = mini_jit_info_table_find (domain, (char *)ip, NULL);
300 err = mono_arch_unwind_frame (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
302 return (MonoJitInfo *)-1;
304 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
306 * Remove any unused lmf.
307 * Mask out the lower bits which might be used to hold additional information.
309 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
312 /* Convert between the new and the old APIs */
313 switch (frame.type) {
314 case FRAME_TYPE_MANAGED:
318 case FRAME_TYPE_TRAMPOLINE:
320 case FRAME_TYPE_MANAGED_TO_NATIVE:
324 memset (res, 0, sizeof (MonoJitInfo));
325 res->d.method = frame.method;
328 case FRAME_TYPE_DEBUGGER_INVOKE: {
332 * The normal exception handling code can't handle this frame, so just
335 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
336 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
340 g_assert_not_reached ();
345 /* mono_find_jit_info:
347 * This function is used to gather information from @ctx. It return the
348 * MonoJitInfo of the corresponding function, unwinds one stack frame and
349 * stores the resulting context into @new_ctx. It also stores a string
350 * describing the stack location into @trace (if not NULL), and modifies
351 * the @lmf if necessary. @native_offset return the IP offset from the
352 * start of the function or -1 if that info is not available.
355 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
356 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
360 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
362 MonoMethod *method = NULL;
373 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
375 if (ji == (gpointer)-1)
378 if (ji && !ji->is_trampoline)
379 method = jinfo_get_method (ji);
381 if (managed2 || (method && method->wrapper_type)) {
382 const char *real_ip, *start;
385 start = (const char *)ji->code_start;
387 /* ctx->ip points into native code */
388 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
390 real_ip = (const char*)ip;
392 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
393 offset = real_ip - start;
398 *native_offset = offset;
401 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
405 *trace = mono_debug_print_stack_frame (method, offset, domain);
408 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
409 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
418 * mono_find_jit_info_ext:
420 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
422 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
423 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
424 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
425 * to obtain the last managed frame.
426 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
427 * On return, it will be filled with the locations where callee saved registers are saved
428 * by the current frame. This is returned outside of StackFrameInfo because it can be
429 * quite large on some platforms.
430 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
434 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
435 MonoJitInfo *prev_ji, MonoContext *ctx,
436 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
437 mgreg_t **save_locations,
438 StackFrameInfo *frame)
441 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
443 MonoDomain *target_domain = domain;
444 MonoMethod *method = NULL;
445 gboolean async = mono_thread_info_is_async_context ();
450 /* Avoid costly table lookup during stack overflow */
451 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
454 ji = mini_jit_info_table_find (domain, (char *)ip, &target_domain);
457 target_domain = domain;
460 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
462 err = mono_arch_unwind_frame (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
466 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
468 * Remove any unused lmf.
469 * Mask out the lower bits which might be used to hold additional information.
471 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
474 if (frame->ji && !frame->ji->is_trampoline && !frame->ji->async)
475 method = jinfo_get_method (frame->ji);
477 if (frame->type == FRAME_TYPE_MANAGED && method) {
478 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
479 frame->managed = TRUE;
482 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
484 * This type of frame is just a marker, the caller should unwind once more to get the
485 * last managed frame.
488 frame->method = NULL;
491 frame->native_offset = -1;
492 frame->domain = target_domain;
493 frame->async_context = async;
497 if (frame->type == FRAME_TYPE_MANAGED)
498 frame->method = method;
500 if (ji && (frame->managed || (method && method->wrapper_type))) {
501 const char *real_ip, *start;
503 start = (const char *)ji->code_start;
504 if (frame->type == FRAME_TYPE_MANAGED)
505 real_ip = (const char*)ip;
507 /* ctx->ip points into native code */
508 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
510 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
511 frame->native_offset = real_ip - start;
513 frame->native_offset = -1;
517 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
519 if (trace && frame->method) {
520 char *fname = mono_method_full_name (frame->method, TRUE);
521 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
530 * This function is async-safe.
533 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
535 MonoGenericJitInfo *gi;
539 if (!ji->has_generic_jit_info)
541 gi = mono_jit_info_get_generic_jit_info (ji);
547 * Search location list if available, it contains the precise location of the
548 * argument for every pc offset, even if the method was interrupted while it was in
552 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
555 for (i = 0; i < gi->nlocs; ++i) {
556 MonoDwarfLocListEntry *entry = &gi->locations [i];
558 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
560 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
562 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
566 g_assert (i < gi->nlocs);
569 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
571 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
575 method = jinfo_get_method (ji);
576 if (mono_method_get_context (method)->method_inst) {
577 /* A MonoMethodRuntimeGenericContext* */
579 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
583 /* Avoid returning a managed object */
584 MonoObject *this_obj = (MonoObject *)info;
586 return this_obj->vtable;
591 * generic_info is either a MonoMethodRuntimeGenericContext or a MonoVTable.
593 static MonoGenericContext
594 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
596 MonoGenericContext context = { NULL, NULL };
597 MonoClass *klass, *method_container_class;
600 g_assert (generic_info);
602 method = jinfo_get_method (ji);
603 g_assert (method->is_inflated);
604 if (mono_method_get_context (method)->method_inst) {
605 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext *)generic_info;
607 klass = mrgctx->class_vtable->klass;
608 context.method_inst = mrgctx->method_inst;
609 g_assert (context.method_inst);
611 MonoVTable *vtable = (MonoVTable *)generic_info;
613 klass = vtable->klass;
616 //g_assert (!method->klass->generic_container);
617 if (method->klass->generic_class)
618 method_container_class = method->klass->generic_class->container_class;
620 method_container_class = method->klass;
622 /* class might refer to a subclass of method's class */
623 while (!(klass == method->klass || (klass->generic_class && klass->generic_class->container_class == method_container_class))) {
624 klass = klass->parent;
628 if (klass->generic_class || klass->generic_container)
629 context.class_inst = mini_class_get_context (klass)->class_inst;
631 if (klass->generic_class)
632 g_assert (mono_class_has_parent_and_ignore_generics (klass->generic_class->container_class, method_container_class));
634 g_assert (mono_class_has_parent_and_ignore_generics (klass, method_container_class));
640 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
643 MonoGenericContext context;
646 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
647 return jinfo_get_method (ji);
648 context = get_generic_context_from_stack_frame (ji, generic_info);
650 method = jinfo_get_method (ji);
651 method = mono_method_get_declaring_generic_method (method);
652 method = mono_class_inflate_generic_method_checked (method, &context, &error);
653 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
659 * mono_exception_walk_native_trace:
660 * @ex: The exception object whose frames should be walked
661 * @func: callback to call for each stack frame
662 * @user_data: data passed to the callback
664 * This function walks the stacktrace of an exception. For
665 * each frame the callback function is called with the relevant info.
666 * The walk ends when no more stack frames are found or when the callback
667 * returns a TRUE value.
671 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
673 MONO_REQ_GC_UNSAFE_MODE;
675 MonoDomain *domain = mono_domain_get ();
676 MonoArray *ta = ex->trace_ips;
682 len = mono_array_length (ta) >> 1;
683 for (i = 0; i < len; i++) {
684 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
685 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
686 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *)ip);
689 if (func (NULL, ip, 0, FALSE, user_data))
692 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
693 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
702 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
705 MonoDomain *domain = mono_domain_get ();
707 MonoArray *ta = exc->trace_ips;
708 MonoDebugSourceLocation *location;
712 /* Exception is not thrown yet */
713 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, 0, &error);
714 mono_error_set_pending_exception (&error);
718 len = mono_array_length (ta) >> 1;
720 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0, &error);
721 if (mono_error_set_pending_exception (&error))
724 for (i = skip; i < len; i++) {
726 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
727 if (!mono_error_ok (&error)) {
728 mono_error_set_pending_exception (&error);
731 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
732 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
735 ji = mono_jit_info_table_find (domain, (char *)ip);
737 /* Unmanaged frame */
738 mono_array_setref (res, i, sf);
742 g_assert (ji != NULL);
745 /* Can't resolve actual method */
746 method = jinfo_get_method (ji);
748 method = get_method_from_stack_frame (ji, generic_info);
749 if (jinfo_get_method (ji)->wrapper_type) {
753 s = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_REFLECTION);
754 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
758 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
759 if (!mono_error_ok (&error)) {
760 mono_error_set_pending_exception (&error);
763 MONO_OBJECT_SETREF (sf, method, rm);
766 sf->method_index = ji->from_aot ? mono_aot_find_method_index (method) : 0xffffff;
767 sf->method_address = (gsize) ji->code_start;
768 sf->native_offset = (char *)ip - (char *)ji->code_start;
771 * mono_debug_lookup_source_location() returns both the file / line number information
772 * and the IL offset. Note that computing the IL offset is already an expensive
773 * operation, so we shouldn't call this method twice.
775 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
777 sf->il_offset = location->il_offset;
780 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
781 sf->il_offset = sp.il_offset;
786 if (need_file_info) {
787 if (location && location->source_file) {
788 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
789 sf->line = location->row;
790 sf->column = location->column;
792 sf->line = sf->column = 0;
797 mono_debug_free_source_location (location);
798 mono_array_setref (res, i, sf);
805 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
808 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
809 if (jit_tls && jit_tls->orig_ex_ctx_set)
810 start_ctx = &jit_tls->orig_ex_ctx;
812 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
815 * mono_walk_stack_with_ctx:
817 * Unwind the current thread starting at @start_ctx.
819 * If @start_ctx is null, we capture the current context.
822 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
824 MonoContext extra_ctx;
825 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
826 MONO_ARCH_CONTEXT_DEF
828 if (!thread || !thread->jit_data)
832 mono_arch_flush_register_windows ();
834 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
835 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
837 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
839 start_ctx = &extra_ctx;
842 mono_walk_stack_full (func, start_ctx, mono_domain_get (), (MonoJitTlsData *)thread->jit_data, mono_get_lmf (), unwind_options, user_data);
846 * mono_walk_stack_with_state:
848 * Unwind a thread described by @state.
850 * State must be valid (state->valid == TRUE).
852 * If you are using this function to unwind another thread, make sure it is suspended.
854 * If @state is null, we capture the current context.
857 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
859 MonoThreadUnwindState extra_state;
861 g_assert (!mono_thread_info_is_async_context ());
862 if (!mono_thread_state_init_from_current (&extra_state))
864 state = &extra_state;
867 g_assert (state->valid);
869 if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
873 mono_walk_stack_full (func,
875 (MonoDomain *)state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
876 (MonoJitTlsData *)state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
877 (MonoLMF *)state->unwind_data [MONO_UNWIND_DATA_LMF],
878 unwind_options, user_data);
882 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
884 MonoThreadUnwindState state;
885 if (!mono_thread_state_init_from_current (&state))
887 mono_walk_stack_with_state (func, &state, options, user_data);
891 * mono_walk_stack_full:
892 * @func: callback to call for each stack frame
893 * @domain: starting appdomain, can be NULL to use the current domain
894 * @unwind_options: what extra information the unwinder should gather
895 * @start_ctx: starting state of the stack walk, can be NULL.
896 * @thread: the thread whose stack to walk, can be NULL to use the current thread
897 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
898 * @user_data: data passed to the callback
900 * This function walks the stack of a thread, starting from the state
901 * represented by start_ctx. For each frame the callback
902 * function is called with the relevant info. The walk ends when no more
903 * managed stack frames are found or when the callback returns a TRUE value.
906 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
909 MonoContext ctx, new_ctx;
910 StackFrameInfo frame;
912 mgreg_t *reg_locations [MONO_MAX_IREGS];
913 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
914 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
915 gboolean async = mono_thread_info_is_async_context ();
917 if (mono_llvm_only) {
923 ips = get_unwind_backtrace ();
924 for (l = ips; l; l = l->next) {
925 guint8 *ip = (guint8*)l->data;
926 memset (&frame, 0, sizeof (StackFrameInfo));
927 frame.ji = mini_jit_info_table_find (domain, (char*)ip, &frame.domain);
928 if (!frame.ji || frame.ji->is_trampoline)
930 frame.type = FRAME_TYPE_MANAGED;
931 frame.method = jinfo_get_method (frame.ji);
932 // FIXME: Cannot lookup the actual method
933 frame.actual_method = frame.method;
934 if (frame.type == FRAME_TYPE_MANAGED) {
935 if (!frame.method->wrapper_type || frame.method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
936 frame.managed = TRUE;
938 frame.native_offset = ip - (guint8*)frame.ji->code_start;
939 frame.il_offset = -1;
941 if (func (&frame, NULL, user_data))
948 g_assert (start_ctx);
951 /*The LMF will be null if the target have no managed frames.*/
952 /* g_assert (lmf); */
955 g_assert (unwind_options == MONO_UNWIND_NONE);
957 memcpy (&ctx, start_ctx, sizeof (MonoContext));
958 memset (reg_locations, 0, sizeof (reg_locations));
960 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
962 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
966 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji && !frame.ji->is_trampoline) {
967 MonoDebugSourceLocation *source;
969 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
971 il_offset = source->il_offset;
974 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
975 il_offset = sp.il_offset;
979 mono_debug_free_source_location (source);
983 frame.il_offset = il_offset;
985 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji && !frame.ji->is_trampoline) {
986 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
988 frame.actual_method = frame.method;
991 if (get_reg_locations)
992 frame.reg_locations = reg_locations;
994 if (func (&frame, &ctx, user_data))
997 if (get_reg_locations) {
998 for (i = 0; i < MONO_MAX_IREGS; ++i)
999 if (new_reg_locations [i])
1000 reg_locations [i] = new_reg_locations [i];
1008 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
1009 MonoReflectionMethod **method,
1010 gint32 *iloffset, gint32 *native_offset,
1011 MonoString **file, gint32 *line, gint32 *column)
1014 MonoDomain *domain = mono_domain_get ();
1015 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1016 MonoLMF *lmf = mono_get_lmf ();
1017 MonoJitInfo *ji = NULL;
1018 MonoContext ctx, new_ctx;
1019 MonoDebugSourceLocation *location;
1020 MonoMethod *jmethod = NULL, *actual_method;
1021 StackFrameInfo frame;
1024 MONO_ARCH_CONTEXT_DEF;
1026 if (mono_llvm_only) {
1028 MonoDomain *frame_domain;
1029 guint8 *frame_ip = NULL;
1031 /* FIXME: Generalize this code with an interface which returns an array of StackFrame structures */
1033 ips = get_unwind_backtrace ();
1034 for (l = ips; l && skip >= 0; l = l->next) {
1035 guint8 *ip = (guint8*)l->data;
1039 ji = mini_jit_info_table_find (mono_domain_get (), (char*)ip, &frame_domain);
1040 if (!ji || ji->is_trampoline)
1043 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1044 jmethod = jinfo_get_method (ji);
1045 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1052 /* No way to resolve generic instances */
1053 actual_method = jmethod;
1054 *native_offset = frame_ip - (guint8*)ji->code_start;
1056 mono_arch_flush_register_windows ();
1058 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
1059 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
1061 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
1067 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1071 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1072 frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1073 frame.type == FRAME_TYPE_TRAMPOLINE)
1077 *native_offset = frame.native_offset;
1079 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1080 jmethod = jinfo_get_method (ji);
1081 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1084 } while (skip >= 0);
1086 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
1089 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, actual_method, NULL, &error);
1090 if (!mono_error_ok (&error)) {
1091 mono_error_set_pending_exception (&error);
1094 mono_gc_wbarrier_generic_store (method, (MonoObject*) rm);
1096 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
1098 *iloffset = location->il_offset;
1102 if (need_file_info) {
1104 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
1105 *line = location->row;
1106 *column = location->column;
1109 *line = *column = 0;
1113 mono_debug_free_source_location (location);
1119 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1122 MonoClass *catch_class = ei->data.catch_class;
1123 MonoType *inflated_type;
1124 MonoGenericContext context;
1126 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1127 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1130 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1132 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1134 /* FIXME: we shouldn't inflate but instead put the
1135 type in the rgctx and fetch it from there. It
1136 might be a good idea to do this lazily, i.e. only
1137 when the exception is actually thrown, so as not to
1138 waste space for exception clauses which might never
1140 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
1141 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1143 catch_class = mono_class_from_mono_type (inflated_type);
1144 mono_metadata_free_type (inflated_type);
1150 * mini_jit_info_table_find_ext:
1152 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1153 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1154 * OUT_DOMAIN if it is not NULL.
1157 mini_jit_info_table_find_ext (MonoDomain *domain, char *addr, gboolean allow_trampolines, MonoDomain **out_domain)
1160 MonoInternalThread *t = mono_thread_internal_current ();
1166 ji = mono_jit_info_table_find_internal (domain, addr, TRUE, allow_trampolines);
1169 *out_domain = domain;
1173 /* maybe it is shared code, so we also search in the root domain */
1174 if (domain != mono_get_root_domain ()) {
1175 ji = mono_jit_info_table_find_internal (mono_get_root_domain (), addr, TRUE, allow_trampolines);
1178 *out_domain = mono_get_root_domain ();
1186 refs = (gpointer *)((t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL);
1187 for (; refs && *refs; refs++) {
1188 if (*refs != domain && *refs != mono_get_root_domain ()) {
1189 ji = mono_jit_info_table_find_internal ((MonoDomain*) *refs, addr, TRUE, allow_trampolines);
1192 *out_domain = (MonoDomain*) *refs;
1202 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1204 return mini_jit_info_table_find_ext (domain, addr, FALSE, out_domain);
1207 /* Class lazy loading functions */
1208 static GENERATE_GET_CLASS_WITH_CACHE (runtime_compat_attr, System.Runtime.CompilerServices, RuntimeCompatibilityAttribute)
1211 * wrap_non_exception_throws:
1213 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1214 * WrapNonExceptionThrows flag set.
1217 wrap_non_exception_throws (MonoMethod *m)
1220 MonoAssembly *ass = m->klass->image->assembly;
1221 MonoCustomAttrInfo* attrs;
1224 gboolean val = FALSE;
1227 if (ass->wrap_non_exception_throws_inited)
1228 return ass->wrap_non_exception_throws;
1230 klass = mono_class_get_runtime_compat_attr_class ();
1232 attrs = mono_custom_attrs_from_assembly_checked (ass, FALSE, &error);
1233 mono_error_cleanup (&error); /* FIXME don't swallow the error */
1235 for (i = 0; i < attrs->num_attrs; ++i) {
1236 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1238 int num_named, named_type, name_len;
1241 if (!attr->ctor || attr->ctor->klass != klass)
1243 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1244 p = (const char*)attr->data;
1245 g_assert (read16 (p) == 0x0001);
1247 num_named = read16 (p);
1253 /* data_type = *p; */
1256 if (named_type != 0x54)
1258 name_len = mono_metadata_decode_blob_size (p, &p);
1259 name = (char *)g_malloc (name_len + 1);
1260 memcpy (name, p, name_len);
1261 name [name_len] = 0;
1263 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1265 /* The value is a BOOLEAN */
1268 mono_custom_attrs_free (attrs);
1271 ass->wrap_non_exception_throws = val;
1272 mono_memory_barrier ();
1273 ass->wrap_non_exception_throws_inited = TRUE;
1278 #ifndef MONO_ARCH_STACK_GROWS_UP
1279 #define DOES_STACK_GROWS_UP 1
1281 #define DOES_STACK_GROWS_UP 0
1284 #define MAX_UNMANAGED_BACKTRACE 128
1286 build_native_trace (MonoError *error)
1288 mono_error_init (error);
1289 /* This puppy only makes sense on mobile, IOW, ARM. */
1290 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1292 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1295 size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1301 res = mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, size, error);
1302 return_val_if_nok (error, NULL);
1304 for (i = 0; i < size; i++)
1305 mono_array_set (res, gpointer, i, native_trace [i]);
1313 setup_stack_trace (MonoException *mono_ex, GSList *dynamic_methods, MonoArray *initial_trace_ips, GList **trace_ips)
1315 if (mono_ex && !initial_trace_ips) {
1316 *trace_ips = g_list_reverse (*trace_ips);
1318 MonoArray *ips_arr = mono_glist_to_array (*trace_ips, mono_defaults.int_class, &error);
1319 mono_error_assert_ok (&error);
1320 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
1321 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace (&error));
1322 mono_error_assert_ok (&error);
1323 if (dynamic_methods) {
1324 /* These methods could go away anytime, so save a reference to them in the exception object */
1326 MonoMList *list = NULL;
1328 for (l = dynamic_methods; l; l = l->next) {
1330 MonoDomain *domain = mono_domain_get ();
1332 if (domain->method_to_dyn_method) {
1333 mono_domain_lock (domain);
1334 dis_link = (guint32)(size_t)g_hash_table_lookup (domain->method_to_dyn_method, l->data);
1335 mono_domain_unlock (domain);
1337 MonoObject *o = mono_gchandle_get_target (dis_link);
1339 list = mono_mlist_prepend_checked (list, o, &error);
1340 mono_error_assert_ok (&error);
1346 MONO_OBJECT_SETREF (mono_ex, dynamic_methods, list);
1349 g_list_free (*trace_ips);
1354 * mono_handle_exception_internal_first_pass:
1356 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1357 * OBJ is found. Run the index of the filter clause which caught the exception into
1358 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1361 mono_handle_exception_internal_first_pass (MonoContext *ctx, MonoObject *obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1364 MonoDomain *domain = mono_domain_get ();
1365 MonoJitInfo *ji = NULL;
1366 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1367 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1368 MonoLMF *lmf = mono_get_lmf ();
1369 MonoArray *initial_trace_ips = NULL;
1370 GList *trace_ips = NULL;
1371 GSList *dynamic_methods = NULL;
1372 MonoException *mono_ex;
1373 gboolean stack_overflow = FALSE;
1374 MonoContext initial_ctx;
1376 int frame_count = 0;
1381 g_assert (ctx != NULL);
1383 if (obj == (MonoObject *)domain->stack_overflow_ex)
1384 stack_overflow = TRUE;
1386 mono_ex = (MonoException*)obj;
1387 initial_trace_ips = mono_ex->trace_ips;
1389 if (mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1390 mono_ex = (MonoException*)obj;
1391 initial_trace_ips = mono_ex->trace_ips;
1393 mono_error_assert_ok (&error);
1398 call_filter = (int (*) (MonoContext *, void *))mono_get_call_filter ();
1400 g_assert (jit_tls->end_of_stack);
1401 g_assert (jit_tls->abort_func);
1404 *out_filter_idx = -1;
1408 *out_prev_ji = NULL;
1413 MonoContext new_ctx;
1415 int clause_index_start = 0;
1416 gboolean unwind_res = TRUE;
1418 StackFrameInfo frame;
1423 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1425 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1426 frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1427 frame.type == FRAME_TYPE_TRAMPOLINE) {
1431 g_assert (frame.type == FRAME_TYPE_MANAGED);
1436 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1437 g_slist_free (dynamic_methods);
1442 method = jinfo_get_method (ji);
1443 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1445 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1446 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1447 "The native frame called the managed method:\n%s\n",
1448 mono_method_full_name (method, TRUE));
1451 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1453 * Avoid overwriting the stack trace if the exception is
1454 * rethrown. Also avoid giant stack traces during a stack
1457 if (!initial_trace_ips && (frame_count < 1000)) {
1458 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1459 trace_ips = g_list_prepend (trace_ips,
1460 get_generic_info_from_stack_frame (ji, ctx));
1464 if (method->dynamic)
1465 dynamic_methods = g_slist_prepend (dynamic_methods, method);
1467 if (stack_overflow) {
1468 if (DOES_STACK_GROWS_UP)
1469 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1471 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1473 free_stack = 0xffffff;
1476 for (i = clause_index_start; i < ji->num_clauses; i++) {
1477 MonoJitExceptionInfo *ei = &ji->clauses [i];
1478 gboolean filtered = FALSE;
1481 * During stack overflow, wait till the unwinding frees some stack
1482 * space before running handlers/finalizers.
1484 if (free_stack <= (64 * 1024))
1487 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1489 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1492 * Have to unwrap RuntimeWrappedExceptions if the
1493 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1495 if (non_exception && !wrap_non_exception_throws (method))
1496 ex_obj = non_exception;
1500 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1501 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1502 #ifndef DISABLE_PERFCOUNTERS
1503 mono_perfcounters->exceptions_filters++;
1506 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1507 trim the stackframe since if it returns FALSE we lose information.
1509 FIXME Not 100% sure if it's a good idea even with user clauses.
1512 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1514 #ifndef MONO_CROSS_COMPILE
1515 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1517 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1519 /* Can't pass the ex object in a register yet to filter clauses, because call_filter () might not support it */
1520 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1522 g_assert (!ji->from_llvm);
1523 /* store the exception object in bp + ei->exvar_offset */
1524 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1528 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1530 * Pass the original il clause index to the landing pad so it can
1531 * branch to the landing pad associated with the il clause.
1532 * This is needed because llvm compiled code assumes that the EH
1533 * code always branches to the innermost landing pad.
1536 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1539 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1540 filtered = call_filter (ctx, ei->data.filter);
1541 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1542 if (filtered && out_filter_idx)
1543 *out_filter_idx = filter_idx;
1550 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1551 g_slist_free (dynamic_methods);
1552 /* mono_debugger_agent_handle_exception () needs this */
1553 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1558 MonoError isinst_error;
1559 mono_error_init (&isinst_error);
1560 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (ex_obj, catch_class, &error)) {
1561 setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
1562 g_slist_free (dynamic_methods);
1567 /* mono_debugger_agent_handle_exception () needs this */
1568 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1571 mono_error_cleanup (&isinst_error);
1578 g_assert_not_reached ();
1582 * mono_handle_exception_internal:
1583 * @ctx: saved processor state
1584 * @obj: the exception object
1585 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1588 mono_handle_exception_internal (MonoContext *ctx, MonoObject *obj, gboolean resume, MonoJitInfo **out_ji)
1591 MonoDomain *domain = mono_domain_get ();
1592 MonoJitInfo *ji, *prev_ji;
1593 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1594 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1595 MonoLMF *lmf = mono_get_lmf ();
1596 MonoException *mono_ex;
1597 gboolean stack_overflow = FALSE;
1598 MonoContext initial_ctx;
1600 int frame_count = 0;
1601 gint32 filter_idx, first_filter_idx = 0;
1604 MonoObject *non_exception = NULL;
1606 g_assert (ctx != NULL);
1608 MonoException *ex = mono_get_exception_null_reference ();
1609 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1610 obj = (MonoObject *)ex;
1614 * Allocate a new exception object instead of the preconstructed ones.
1616 if (obj == (MonoObject *)domain->stack_overflow_ex) {
1618 * It is not a good idea to try and put even more pressure on the little stack available.
1619 * obj = mono_get_exception_stack_overflow ();
1621 stack_overflow = TRUE;
1623 else if (obj == (MonoObject *)domain->null_reference_ex) {
1624 obj = (MonoObject *)mono_get_exception_null_reference ();
1627 if (!mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1628 mono_error_assert_ok (&error);
1629 non_exception = obj;
1630 obj = (MonoObject *)mono_get_exception_runtime_wrapped_checked (obj, &error);
1631 mono_error_assert_ok (&error);
1634 mono_ex = (MonoException*)obj;
1636 if (mini_get_debug_options ()->suspend_on_exception) {
1637 mono_runtime_printf_err ("Exception thrown, suspending...");
1642 if (mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1643 mono_ex = (MonoException*)obj;
1645 mono_error_assert_ok (&error);
1649 if (mono_ex && jit_tls->class_cast_from) {
1650 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1651 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1652 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1653 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1654 mono_ex->message = mono_string_new (domain, msg);
1659 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1660 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1661 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1662 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1663 mono_ex->message = mono_string_new (domain, msg);
1671 call_filter = (int (*)(MonoContext *, void*))mono_get_call_filter ();
1673 g_assert (jit_tls->end_of_stack);
1674 g_assert (jit_tls->abort_func);
1677 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1678 * end up being TRUE on any code path.
1680 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1685 MonoContext ctx_cp = *ctx;
1686 if (mono_trace_is_enabled ()) {
1687 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1688 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1689 MonoObject *message;
1690 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1692 if (get_message == NULL) {
1694 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1696 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1698 MonoObject *exc = NULL;
1699 message = mono_runtime_try_invoke (get_message, obj, NULL, &exc, &error);
1700 g_assert (exc == NULL);
1701 mono_error_assert_ok (&error);
1705 msg = mono_string_to_utf8_checked ((MonoString *) message, &error);
1706 if (!is_ok (&error)) {
1707 mono_error_cleanup (&error);
1708 msg = g_strdup ("(error while display System.Exception.Message property)");
1711 msg = g_strdup ("(System.Exception.Message property not available)");
1714 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);
1716 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1717 mono_print_thread_dump_from_ctx (ctx);
1719 jit_tls->orig_ex_ctx_set = TRUE;
1720 mono_profiler_exception_thrown (obj);
1721 jit_tls->orig_ex_ctx_set = FALSE;
1723 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1726 if (mini_get_debug_options ()->break_on_exc)
1728 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1730 if (mini_get_debug_options ()->suspend_on_unhandled) {
1731 mono_runtime_printf_err ("Unhandled exception, suspending...");
1736 // FIXME: This runs managed code so it might cause another stack overflow when
1737 // we are handling a stack overflow
1738 mono_unhandled_exception (obj);
1740 gboolean unhandled = FALSE;
1743 * The exceptions caught by the mono_runtime_invoke_checked () calls
1744 * in the threadpool needs to be treated as unhandled (#669836).
1746 * FIXME: The check below is hackish, but its hard to distinguish
1747 * these runtime invoke calls from others in the runtime.
1749 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1750 if (prev_ji && jinfo_get_method (prev_ji) == mono_defaults.threadpool_perform_wait_callback_method)
1755 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1757 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, &ctx_cp);
1767 MonoContext new_ctx;
1769 int clause_index_start = 0;
1770 gboolean unwind_res = TRUE;
1774 ji = jit_tls->resume_state.ji;
1775 new_ctx = jit_tls->resume_state.new_ctx;
1776 clause_index_start = jit_tls->resume_state.clause_index;
1777 lmf = jit_tls->resume_state.lmf;
1778 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1779 filter_idx = jit_tls->resume_state.filter_idx;
1781 StackFrameInfo frame;
1783 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1785 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
1786 frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
1787 frame.type == FRAME_TYPE_TRAMPOLINE) {
1791 g_assert (frame.type == FRAME_TYPE_MANAGED);
1797 *(mono_get_lmf_addr ()) = lmf;
1799 jit_tls->abort_func (obj);
1800 g_assert_not_reached ();
1803 method = jinfo_get_method (ji);
1805 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1807 if (stack_overflow) {
1808 if (DOES_STACK_GROWS_UP)
1809 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1811 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1813 free_stack = 0xffffff;
1816 for (i = clause_index_start; i < ji->num_clauses; i++) {
1817 MonoJitExceptionInfo *ei = &ji->clauses [i];
1818 gboolean filtered = FALSE;
1821 * During stack overflow, wait till the unwinding frees some stack
1822 * space before running handlers/finalizers.
1824 if (free_stack <= (64 * 1024))
1827 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1829 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1832 * Have to unwrap RuntimeWrappedExceptions if the
1833 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1835 if (non_exception && !wrap_non_exception_throws (method))
1836 ex_obj = non_exception;
1840 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1841 #ifndef MONO_CROSS_COMPILE
1842 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1843 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1845 g_assert (!ji->from_llvm);
1846 /* store the exception object in bp + ei->exvar_offset */
1847 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1852 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1854 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1857 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1859 * Filter clauses should only be run in the
1860 * first pass of exception handling.
1862 filtered = (filter_idx == first_filter_idx);
1866 mono_error_init (&error);
1867 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1868 mono_object_isinst_checked (ex_obj, catch_class, &error)) || filtered) {
1870 * This guards against the situation that we abort a thread that is executing a finally clause
1871 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1872 * check for this situation here and resume interruption if we are below the guarded block.
1874 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1875 gboolean is_outside = FALSE;
1876 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1877 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1878 //FIXME make this stack direction aware
1879 if (catch_bp > prot_bp) {
1881 } else if (catch_bp == prot_bp) {
1882 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1883 * So we check if the catch handler_start is protected by the guarded handler protected region
1886 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1887 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1888 * There aren't any further finally/fault handler blocks down the stack over this exception.
1889 * This must be ensured by the code that installs the guard trampoline.
1891 g_assert (ji == mini_jit_info_table_find (domain, (char *)MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1893 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1898 jit_tls->handler_block_return_address = NULL;
1899 jit_tls->handler_block = NULL;
1900 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1904 if (mono_trace_is_enabled () && mono_trace_eval (method))
1905 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1906 jit_tls->orig_ex_ctx_set = TRUE;
1907 mono_profiler_exception_clause_handler (method, ei->flags, i);
1908 jit_tls->orig_ex_ctx_set = FALSE;
1909 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1911 #ifndef DISABLE_PERFCOUNTERS
1912 mono_perfcounters->exceptions_depth += frame_count;
1914 if (obj == (MonoObject *)domain->stack_overflow_ex)
1915 jit_tls->handling_stack_ovf = FALSE;
1919 mono_error_cleanup (&error);
1920 if (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
1921 if (mono_trace_is_enabled () && mono_trace_eval (method))
1922 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1923 jit_tls->orig_ex_ctx_set = TRUE;
1924 mono_profiler_exception_clause_handler (method, ei->flags, i);
1925 jit_tls->orig_ex_ctx_set = FALSE;
1926 call_filter (ctx, ei->handler_start);
1928 if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
1929 if (mono_trace_is_enabled () && mono_trace_eval (method))
1930 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1931 jit_tls->orig_ex_ctx_set = TRUE;
1932 mono_profiler_exception_clause_handler (method, ei->flags, i);
1933 jit_tls->orig_ex_ctx_set = FALSE;
1934 #ifndef DISABLE_PERFCOUNTERS
1935 mono_perfcounters->exceptions_finallys++;
1938 if (ji->from_llvm) {
1940 * LLVM compiled finally handlers follow the design
1941 * of the c++ ehabi, i.e. they call a resume function
1942 * at the end instead of returning to the caller.
1943 * So save the exception handling state,
1944 * mono_resume_unwind () will call us again to continue
1947 jit_tls->resume_state.ex_obj = obj;
1948 jit_tls->resume_state.ji = ji;
1949 jit_tls->resume_state.clause_index = i + 1;
1950 jit_tls->resume_state.ctx = *ctx;
1951 jit_tls->resume_state.new_ctx = new_ctx;
1952 jit_tls->resume_state.lmf = lmf;
1953 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1954 jit_tls->resume_state.filter_idx = filter_idx;
1955 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1958 call_filter (ctx, ei->handler_start);
1964 jit_tls->orig_ex_ctx_set = TRUE;
1965 mono_profiler_exception_method_leave (method);
1966 jit_tls->orig_ex_ctx_set = FALSE;
1971 g_assert_not_reached ();
1975 * mono_debugger_run_finally:
1976 * @start_ctx: saved processor state
1978 * This method is called by the Mono Debugger to call all `finally' clauses of the
1979 * current stack frame. It's used when the user issues a `return' command to make
1980 * the current stack frame return. After returning from this method, the debugger
1981 * unwinds the stack one frame and gives control back to the user.
1983 * NOTE: This method is only used when running inside the Mono Debugger.
1986 mono_debugger_run_finally (MonoContext *start_ctx)
1988 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1989 MonoDomain *domain = mono_domain_get ();
1990 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1991 MonoLMF *lmf = mono_get_lmf ();
1992 MonoContext ctx, new_ctx;
1993 MonoJitInfo *ji, rji;
1998 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1999 if (!ji || ji == (gpointer)-1)
2003 call_filter = (int (*)(MonoContext *, void *))mono_get_call_filter ();
2005 for (i = 0; i < ji->num_clauses; i++) {
2006 MonoJitExceptionInfo *ei = &ji->clauses [i];
2008 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
2009 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
2010 call_filter (&ctx, ei->handler_start);
2016 * mono_handle_exception:
2017 * @ctx: saved processor state
2018 * @obj: the exception object
2021 mono_handle_exception (MonoContext *ctx, MonoObject *obj)
2023 MONO_REQ_GC_UNSAFE_MODE;
2025 #ifndef DISABLE_PERFCOUNTERS
2026 mono_perfcounters->exceptions_thrown++;
2029 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
2032 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2034 #ifndef MONO_ARCH_USE_SIGACTION
2035 #error "Can't use sigaltstack without sigaction"
2038 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
2041 mono_setup_altstack (MonoJitTlsData *tls)
2045 guint8 *staddr = NULL;
2047 if (mono_running_on_valgrind ())
2050 mono_thread_info_get_stack_bounds (&staddr, &stsize);
2054 tls->end_of_stack = staddr + stsize;
2055 tls->stack_size = stsize;
2057 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2059 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2060 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2062 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2064 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2065 /* mprotect can fail for the main thread stack */
2066 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, MONO_MEM_ACCOUNT_EXCEPTIONS);
2067 g_assert (gaddr == tls->stack_ovf_guard_base);
2068 tls->stack_ovf_valloced = TRUE;
2071 /* Setup an alternate signal stack */
2072 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON, MONO_MEM_ACCOUNT_EXCEPTIONS);
2073 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2075 g_assert (tls->signal_stack);
2077 sa.ss_sp = tls->signal_stack;
2078 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2080 g_assert (sigaltstack (&sa, NULL) == 0);
2082 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);
2086 mono_free_altstack (MonoJitTlsData *tls)
2091 sa.ss_sp = tls->signal_stack;
2092 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2093 sa.ss_flags = SS_DISABLE;
2094 err = sigaltstack (&sa, NULL);
2095 g_assert (err == 0);
2097 if (tls->signal_stack)
2098 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MEM_ACCOUNT_EXCEPTIONS);
2099 if (tls->stack_ovf_valloced)
2100 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MEM_ACCOUNT_EXCEPTIONS);
2102 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2105 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2108 mono_setup_altstack (MonoJitTlsData *tls)
2113 mono_free_altstack (MonoJitTlsData *tls)
2117 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2120 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2122 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2123 /* we need to leave some room for throwing the exception */
2124 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2125 unprotect_size -= mono_pagesize ();
2126 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2127 * is sufficient stack
2129 //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);
2131 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2132 return unprotect_size == jit_tls->stack_ovf_guard_size;
2135 static G_GNUC_UNUSED void
2136 try_more_restore (void)
2138 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2139 if (try_restore_stack_protection (jit_tls, 500))
2140 jit_tls->restore_stack_prot = NULL;
2143 static G_GNUC_UNUSED void
2144 restore_stack_protection (void)
2146 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2147 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2148 /* if we can't restore the stack protection, keep a callback installed so
2149 * we'll try to restore as much stack as we can at each return from unmanaged
2152 if (try_restore_stack_protection (jit_tls, 4096))
2153 jit_tls->restore_stack_prot = NULL;
2155 jit_tls->restore_stack_prot = try_more_restore_tramp;
2156 /* here we also throw a stack overflow exception */
2157 ex->trace_ips = NULL;
2158 ex->stack_trace = NULL;
2159 mono_raise_exception (ex);
2163 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2165 MONO_REQ_GC_UNSAFE_MODE;
2167 void (*func)(void) = (void (*)(void))tramp_data;
2173 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *siginfo, guint8* fault_addr)
2178 /* we got a stack overflow in the soft-guard pages
2179 * There are two cases:
2180 * 1) managed code caused the overflow: we unprotect the soft-guard page
2181 * and let the arch-specific code trigger the exception handling mechanism
2182 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2183 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2184 * and hope we can continue with those enabled, at least until the hard-guard page
2185 * is hit. The alternative to continuing here is to just print a message and abort.
2186 * We may add in the future the code to protect the pages again in the codepath
2187 * when we return from unmanaged to managed code.
2189 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2190 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2191 /* we unprotect the minimum amount we can */
2193 gboolean handled = FALSE;
2195 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2196 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2197 guard_size -= mono_pagesize ();
2199 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2200 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2201 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);
2202 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2204 mono_arch_handle_altstack_exception (ctx, siginfo, fault_addr, TRUE);
2209 /* We print a message: after this even managed stack overflows
2210 * may crash the runtime
2212 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2213 if (!jit_tls->handling_stack_ovf) {
2214 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2215 jit_tls->handling_stack_ovf = 1;
2217 /*fprintf (stderr, "Already handling stack overflow\n");*/
2226 MonoMethod *omethod;
2228 } PrintOverflowUserData;
2230 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2232 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2234 MonoMethod *method = NULL;
2235 PrintOverflowUserData *user_data = (PrintOverflowUserData *)data;
2238 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2239 method = jinfo_get_method (frame->ji);
2242 if (user_data->count == 0) {
2243 /* The first frame is in its prolog, so a line number cannot be computed */
2244 user_data->count ++;
2248 /* If this is a one method overflow, skip the other instances */
2249 if (method == user_data->omethod)
2252 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2253 mono_runtime_printf_err (" %s", location);
2256 if (user_data->count == 1) {
2257 mono_runtime_printf_err (" <...>");
2258 user_data->omethod = method;
2260 user_data->omethod = NULL;
2263 user_data->count ++;
2265 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2272 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2274 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2275 PrintOverflowUserData ud;
2279 /* we don't do much now, but we can warn the user with a useful message */
2280 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2282 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2283 mono_sigctx_to_monoctx (ctx, &mctx);
2285 mono_runtime_printf_err ("Stacktrace:");
2287 memset (&ud, 0, sizeof (ud));
2289 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2291 if (ji && !ji->is_trampoline && jinfo_get_method (ji))
2292 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2294 mono_runtime_printf_err ("At <unmanaged>.");
2301 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2303 MonoMethod *method = NULL;
2305 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2306 method = jinfo_get_method (frame->ji);
2309 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2310 mono_runtime_printf_err (" %s", location);
2313 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2318 static G_GNUC_UNUSED gboolean
2319 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2321 GString *p = (GString*)data;
2322 MonoMethod *method = NULL;
2324 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2325 method = jinfo_get_method (frame->ji);
2327 if (method && frame->domain) {
2328 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
2329 g_string_append_printf (p, " %s\n", location);
2332 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2337 #ifndef MONO_CROSS_COMPILE
2339 static gboolean handling_sigsegv = FALSE;
2342 * mono_handle_native_sigsegv:
2344 * Handle a SIGSEGV received while in native code by printing diagnostic
2345 * information and aborting.
2348 mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2350 #ifdef MONO_ARCH_USE_SIGACTION
2351 struct sigaction sa;
2353 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2354 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2356 if (handling_sigsegv)
2359 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2360 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2371 /* To prevent infinite loops when the stack walk causes a crash */
2372 handling_sigsegv = TRUE;
2374 /* !jit_tls means the thread was not registered with the runtime */
2375 if (jit_tls && mono_thread_internal_current ()) {
2376 mono_runtime_printf_err ("Stacktrace:\n");
2378 /* FIXME: Is MONO_UNWIND_LOOKUP_IL_OFFSET correct here? */
2379 mono_walk_stack (print_stack_frame_to_stderr, MONO_UNWIND_LOOKUP_IL_OFFSET, NULL);
2382 #ifdef HAVE_BACKTRACE_SYMBOLS
2388 mono_runtime_printf_err ("\nNative stacktrace:\n");
2390 size = backtrace (array, 256);
2391 names = backtrace_symbols (array, size);
2392 for (i =0; i < size; ++i) {
2393 mono_runtime_printf_err ("\t%s", names [i]);
2397 /* Try to get more meaningful information using gdb */
2399 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2400 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2401 /* From g_spawn_command_line_sync () in eglib */
2404 pid_t crashed_pid = getpid ();
2408 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2409 * it will deadlock. Call the syscall directly instead.
2411 pid = mono_runtime_syscall_fork ();
2412 #if defined (HAVE_PRCTL) && defined(PR_SET_PTRACER)
2414 // Allow gdb to attach to the process even if ptrace_scope sysctl variable is set to
2415 // a value other than 0 (the most permissive ptrace scope). Most modern Linux
2416 // distributions set the scope to 1 which allows attaching only to direct children of
2417 // the current process
2418 prctl (PR_SET_PTRACER, pid, 0, 0, 0);
2422 dup2 (STDERR_FILENO, STDOUT_FILENO);
2424 mono_gdb_render_native_backtraces (crashed_pid);
2428 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2429 waitpid (pid, &status, 0);
2434 mono_exception_native_unwind (ctx, info);
2438 * A SIGSEGV indicates something went very wrong so we can no longer depend
2439 * on anything working. So try to print out lots of diagnostics, starting
2440 * with ones which have a greater chance of working.
2442 mono_runtime_printf_err (
2444 "=================================================================\n"
2445 "Got a %s while executing native code. This usually indicates\n"
2446 "a fatal error in the mono runtime or one of the native libraries \n"
2447 "used by your application.\n"
2448 "=================================================================\n",
2452 #ifdef MONO_ARCH_USE_SIGACTION
2454 /* Remove our SIGABRT handler */
2455 sa.sa_handler = SIG_DFL;
2456 sigemptyset (&sa.sa_mask);
2459 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2463 if (!mono_do_crash_chaining) {
2464 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2465 #if defined (PLATFORM_ANDROID)
2476 mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2478 g_assert_not_reached ();
2481 #endif /* !MONO_CROSS_COMPILE */
2484 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2486 MonoInternalThread *thread = mono_thread_internal_current ();
2487 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2492 GError *error = NULL;
2497 text = g_string_new (0);
2499 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2501 g_string_append_printf (text, "\n\"%s\"", name);
2504 else if (thread->threadpool_thread)
2505 g_string_append (text, "\n\"<threadpool thread>\"");
2507 g_string_append (text, "\n\"<unnamed thread>\"");
2509 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
2510 mono_thread_internal_describe (thread, text);
2511 g_string_append (text, "\n");
2513 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2515 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2517 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2519 mono_sigctx_to_monoctx (sigctx, &ctx);
2521 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2523 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2526 mono_runtime_printf ("%s", text->str);
2528 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2529 OutputDebugStringA(text->str);
2532 g_string_free (text, TRUE);
2533 mono_runtime_stdout_fflush ();
2537 * mono_print_thread_dump:
2539 * Print information about the current thread to stdout.
2540 * SIGCTX can be NULL, allowing this to be called from gdb.
2543 mono_print_thread_dump (void *sigctx)
2545 mono_print_thread_dump_internal (sigctx, NULL);
2549 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2551 mono_print_thread_dump_internal (NULL, ctx);
2555 * mono_resume_unwind:
2557 * This is called by a trampoline from LLVM compiled finally clauses to continue
2561 mono_resume_unwind (MonoContext *ctx)
2563 MONO_REQ_GC_UNSAFE_MODE;
2565 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2566 MonoContext new_ctx;
2568 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2569 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2572 mono_handle_exception_internal (&new_ctx, (MonoObject *)jit_tls->resume_state.ex_obj, TRUE, NULL);
2574 mono_restore_context (&new_ctx);
2577 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2582 MonoJitExceptionInfo *ei;
2583 } FindHandlerBlockData;
2586 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2590 FindHandlerBlockData *pdata = (FindHandlerBlockData *)data;
2591 MonoJitInfo *ji = frame->ji;
2596 ip = MONO_CONTEXT_GET_IP (ctx);
2598 for (i = 0; i < ji->num_clauses; ++i) {
2599 MonoJitExceptionInfo *ei = ji->clauses + i;
2600 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2602 /*If ip points to the first instruction it means the handler block didn't start
2603 so we can leave its execution to the EH machinery*/
2604 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2616 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2619 MonoJitExceptionInfo *clause = NULL;
2622 ip = MONO_CONTEXT_GET_IP (ctx);
2624 for (i = 0; i < ji->num_clauses; ++i) {
2625 clause = &ji->clauses [i];
2626 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2628 if (clause->handler_start < ip && clause->data.handler_end > ip)
2632 /*no matching finally */
2633 if (i == ji->num_clauses)
2636 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2637 if (ip == clause->handler_start)
2640 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2644 * Finds the bottom handler block running and install a block guard if needed.
2647 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2649 FindHandlerBlockData data = { 0 };
2650 MonoJitTlsData *jit_tls = (MonoJitTlsData *)ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2653 #ifndef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD_AOT
2658 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2659 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2661 if (!jit_tls || jit_tls->handler_block_return_address)
2664 /* Do an async safe stack walk */
2665 mono_thread_info_set_is_async_context (TRUE);
2666 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2667 mono_thread_info_set_is_async_context (FALSE);
2672 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2674 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2675 if (resume_ip == NULL)
2678 jit_tls->handler_block_return_address = resume_ip;
2679 jit_tls->handler_block = data.ei;
2685 mono_current_thread_has_handle_block_guard (void)
2687 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2688 return jit_tls && jit_tls->handler_block_return_address != NULL;
2693 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2699 mono_current_thread_has_handle_block_guard (void)
2707 mono_set_cast_details (MonoClass *from, MonoClass *to)
2709 MonoJitTlsData *jit_tls = NULL;
2711 if (mini_get_debug_options ()->better_cast_details) {
2712 jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2713 jit_tls->class_cast_from = from;
2714 jit_tls->class_cast_to = to;
2719 /*returns false if the thread is not attached*/
2721 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2723 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2724 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2727 g_error ("Invoked mono_thread_state_init_from_sigctx from non-Mono thread");
2732 mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
2734 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2735 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2736 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2739 mono_thread_state_init (ctx);
2742 if (!ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] || !ctx->unwind_data [MONO_UNWIND_DATA_LMF])
2748 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2754 mono_thread_state_init (MonoThreadUnwindState *ctx)
2756 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2758 #if defined(MONO_CROSS_COMPILE)
2759 ctx->valid = FALSE; //A cross compiler doesn't need to suspend.
2760 #elif MONO_ARCH_HAS_MONO_CONTEXT
2761 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2763 g_error ("Use a null sigctx requires a working mono-context");
2766 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2767 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2768 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread ? thread->jit_data : NULL;
2774 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2776 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2783 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2784 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2785 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2790 /*returns false if the thread is not attached*/
2792 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2794 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2795 MONO_ARCH_CONTEXT_DEF
2797 mono_arch_flush_register_windows ();
2799 if (!thread || !thread->jit_data) {
2803 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2804 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2806 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2809 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2810 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2811 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2817 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2819 mono_handle_exception (ctx, (MonoObject *)exc);
2820 mono_restore_context (ctx);
2823 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2825 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2827 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2828 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
2829 jit_tls->ex_ctx = *ctx;
2831 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2833 g_error ("This target doesn't support mono_arch_setup_async_callback");
2838 * mono_restore_context:
2840 * Call the architecture specific restore context function.
2843 mono_restore_context (MonoContext *ctx)
2845 static void (*restore_context) (MonoContext *);
2847 if (!restore_context)
2848 restore_context = (void (*)(MonoContext *))mono_get_restore_context ();
2849 restore_context (ctx);
2850 g_assert_not_reached ();
2854 * mono_jinfo_get_unwind_info:
2856 * Return the unwind info for JI.
2859 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2862 return mono_aot_get_unwind_info (ji, unwind_info_len);
2864 return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
2868 mono_jinfo_get_epilog_size (MonoJitInfo *ji)
2870 MonoArchEHJitInfo *info;
2872 info = mono_jit_info_get_arch_eh_info (ji);
2875 return info->epilog_size;
2879 * LLVM/Bitcode exception handling.
2883 throw_exception (MonoObject *ex, gboolean rethrow)
2885 MONO_REQ_GC_UNSAFE_MODE;
2888 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
2889 MonoException *mono_ex;
2891 if (!mono_object_isinst_checked (ex, mono_defaults.exception_class, &error)) {
2892 mono_error_assert_ok (&error);
2893 mono_ex = mono_get_exception_runtime_wrapped_checked (ex, &error);
2894 mono_error_assert_ok (&error);
2895 jit_tls->thrown_non_exc = mono_gchandle_new (ex, FALSE);
2898 mono_ex = (MonoException*)ex;
2901 jit_tls->thrown_exc = mono_gchandle_new ((MonoObject*)mono_ex, FALSE);
2904 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
2905 GList *l, *ips = NULL;
2908 _Unwind_Backtrace (build_stack_trace, &ips);
2909 /* The list contains ip-gshared info pairs */
2911 ips = g_list_reverse (ips);
2912 for (l = ips; l; l = l->next) {
2913 trace = g_list_append (trace, l->data);
2914 trace = g_list_append (trace, NULL);
2916 MonoArray *ips_arr = mono_glist_to_array (trace, mono_defaults.int_class, &error);
2917 mono_error_assert_ok (&error);
2918 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
2920 g_list_free (trace);
2924 mono_llvm_cpp_throw_exception ();
2928 mono_llvm_throw_exception (MonoObject *ex)
2930 throw_exception (ex, FALSE);
2934 mono_llvm_rethrow_exception (MonoObject *ex)
2936 throw_exception (ex, TRUE);
2940 mono_llvm_raise_exception (MonoException *e)
2942 mono_llvm_throw_exception ((MonoObject*)e);
2946 mono_llvm_throw_corlib_exception (guint32 ex_token_index)
2948 guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
2951 ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
2953 mono_llvm_throw_exception ((MonoObject*)ex);
2957 * mono_llvm_resume_exception:
2959 * Resume exception propagation.
2962 mono_llvm_resume_exception (void)
2964 mono_llvm_cpp_throw_exception ();
2968 * mono_llvm_load_exception:
2970 * Return the currently thrown exception.
2973 mono_llvm_load_exception (void)
2976 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
2978 MonoException *mono_ex = (MonoException*)mono_gchandle_get_target (jit_tls->thrown_exc);
2980 if (mono_ex->trace_ips) {
2981 GList *trace_ips = NULL;
2982 gpointer ip = __builtin_return_address (0);
2984 size_t upper = mono_array_length (mono_ex->trace_ips);
2986 for (int i = 0; i < upper; i+= 2) {
2987 gpointer curr_ip = mono_array_get (mono_ex->trace_ips, gpointer, i);
2988 gpointer curr_info = mono_array_get (mono_ex->trace_ips, gpointer, i + 1);
2989 trace_ips = g_list_append (trace_ips, curr_ip);
2990 trace_ips = g_list_append (trace_ips, curr_info);
2996 // FIXME: Does this work correctly for rethrows?
2997 // We may be discarding useful information
2998 // when this gets GC'ed
2999 MonoArray *ips_arr = mono_glist_to_array (trace_ips, mono_defaults.int_class, &error);
3000 mono_error_assert_ok (&error);
3001 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
3002 g_list_free (trace_ips);
3005 //MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex));
3007 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, 0, &error));
3008 mono_error_assert_ok (&error);
3009 MONO_OBJECT_SETREF (mono_ex, stack_trace, mono_array_new_checked (mono_domain_get (), mono_defaults.stack_frame_class, 0, &error));
3010 mono_error_assert_ok (&error);
3013 return &mono_ex->object;
3017 * mono_llvm_clear_exception:
3019 * Mark the currently thrown exception as handled.
3022 mono_llvm_clear_exception (void)
3024 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3025 mono_gchandle_free (jit_tls->thrown_exc);
3026 jit_tls->thrown_exc = 0;
3027 if (jit_tls->thrown_non_exc)
3028 mono_gchandle_free (jit_tls->thrown_non_exc);
3029 jit_tls->thrown_non_exc = 0;
3031 mono_memory_barrier ();
3035 * mono_llvm_match_exception:
3037 * Return the innermost clause containing REGION_START-REGION_END which can handle
3038 * the current exception.
3041 mono_llvm_match_exception (MonoJitInfo *jinfo, guint32 region_start, guint32 region_end, gpointer rgctx, MonoObject *this_obj)
3044 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3048 g_assert (jit_tls->thrown_exc);
3049 exc = mono_gchandle_get_target (jit_tls->thrown_exc);
3050 if (jit_tls->thrown_non_exc) {
3052 * Have to unwrap RuntimeWrappedExceptions if the
3053 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
3055 if (!wrap_non_exception_throws (jinfo_get_method (jinfo)))
3056 exc = mono_gchandle_get_target (jit_tls->thrown_non_exc);
3059 for (int i = 0; i < jinfo->num_clauses; i++) {
3060 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
3061 MonoClass *catch_class;
3063 if (! (ei->try_offset == region_start && ei->try_offset + ei->try_len == region_end) )
3066 catch_class = ei->data.catch_class;
3067 if (mono_class_is_open_constructed_type (&catch_class->byval_arg)) {
3068 MonoGenericContext context;
3069 MonoType *inflated_type;
3071 g_assert (rgctx || this_obj);
3072 context = get_generic_context_from_stack_frame (jinfo, rgctx ? rgctx : this_obj->vtable);
3073 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
3074 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
3076 catch_class = mono_class_from_mono_type (inflated_type);
3077 mono_metadata_free_type (inflated_type);
3080 // FIXME: Handle edge cases handled in get_exception_catch_class
3081 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (exc, catch_class, &error)) {
3082 index = ei->clause_index;
3085 mono_error_assert_ok (&error);
3087 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3088 g_assert_not_reached ();
3097 mono_debug_personality (int a, _Unwind_Action b,
3098 uint64_t c, struct _Unwind_Exception *d, struct _Unwind_Context *e)
3100 g_assert_not_reached ();
3104 mono_debug_personality (void);
3107 mono_debug_personality (void)
3109 g_assert_not_reached ();