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).
18 #ifdef HAVE_EXECINFO_H
22 #ifdef HAVE_SYS_TYPES_H
23 #include <sys/types.h>
26 #ifdef HAVE_SYS_WAIT_H
34 #ifdef HAVE_SYS_SYSCALL_H
35 #include <sys/syscall.h>
38 #include <mono/metadata/appdomain.h>
39 #include <mono/metadata/tabledefs.h>
40 #include <mono/metadata/threads.h>
41 #include <mono/metadata/threads-types.h>
42 #include <mono/metadata/debug-helpers.h>
43 #include <mono/metadata/exception.h>
44 #include <mono/metadata/gc-internal.h>
45 #include <mono/metadata/mono-debug.h>
46 #include <mono/metadata/profiler.h>
47 #include <mono/metadata/mono-endian.h>
48 #include <mono/metadata/environment.h>
49 #include <mono/utils/mono-mmap.h>
50 #include <mono/utils/mono-logger-internal.h>
53 #include "debug-mini.h"
55 #include "debugger-agent.h"
57 #ifndef MONO_ARCH_CONTEXT_DEF
58 #define MONO_ARCH_CONTEXT_DEF
61 static gpointer restore_context_func, call_filter_func;
62 static gpointer throw_exception_func, rethrow_exception_func;
63 static gpointer throw_corlib_exception_func;
65 static gpointer try_more_restore_tramp = NULL;
66 static gpointer restore_stack_protection_tramp = NULL;
68 static MonoUnhandledExceptionFunc unhandled_exception_hook = NULL;
69 static gpointer unhandled_exception_hook_data = NULL;
71 static void try_more_restore (void);
72 static void restore_stack_protection (void);
73 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
74 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
75 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
78 mono_exceptions_init (void)
80 MonoRuntimeExceptionHandlingCallbacks cbs;
82 restore_context_func = mono_aot_get_trampoline ("restore_context");
83 call_filter_func = mono_aot_get_trampoline ("call_filter");
84 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
85 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
89 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
91 mono_save_trampoline_xdebug_info (info);
92 mono_tramp_info_free (info);
94 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
96 mono_save_trampoline_xdebug_info (info);
97 mono_tramp_info_free (info);
99 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
101 mono_save_trampoline_xdebug_info (info);
102 mono_tramp_info_free (info);
104 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
106 mono_save_trampoline_xdebug_info (info);
107 mono_tramp_info_free (info);
110 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
111 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
112 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
115 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
116 mono_arch_exceptions_init ();
118 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
119 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
120 cbs.mono_raise_exception = mono_get_throw_exception ();
121 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
122 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
123 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
124 mono_install_eh_callbacks (&cbs);
128 mono_get_throw_exception (void)
130 g_assert (throw_exception_func);
131 return throw_exception_func;
135 mono_get_rethrow_exception (void)
137 g_assert (rethrow_exception_func);
138 return rethrow_exception_func;
142 mono_get_call_filter (void)
144 g_assert (call_filter_func);
145 return call_filter_func;
149 mono_get_restore_context (void)
151 g_assert (restore_context_func);
152 return restore_context_func;
156 mono_get_throw_corlib_exception (void)
158 gpointer code = NULL;
161 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
162 if (throw_corlib_exception_func)
163 return throw_corlib_exception_func;
166 code = mono_aot_get_trampoline ("throw_corlib_exception");
168 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
170 mono_save_trampoline_xdebug_info (info);
171 mono_tramp_info_free (info);
175 mono_memory_barrier ();
177 throw_corlib_exception_func = code;
179 return throw_corlib_exception_func;
183 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
185 MonoTryBlockHoleTableJitInfo *table;
190 if (ei->try_start > ip || ip >= ei->try_end)
193 if (!ji->has_try_block_holes)
196 table = mono_jit_info_get_try_block_hole_table_info (ji);
197 offset = (guint32)((char*)ip - (char*)ji->code_start);
198 clause = (guint16)(ei - ji->clauses);
199 g_assert (clause < ji->num_clauses);
201 for (i = 0; i < table->num_holes; ++i) {
202 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
203 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
212 * Translate between the mono_arch_find_jit_info function and the old API.
215 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
216 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
218 StackFrameInfo frame;
221 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
223 /* Avoid costly table lookup during stack overflow */
224 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
227 ji = mini_jit_info_table_find (domain, ip, NULL);
232 err = mono_arch_find_jit_info (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
236 /* Convert between the new and the old APIs */
237 switch (frame.type) {
238 case FRAME_TYPE_MANAGED:
242 case FRAME_TYPE_MANAGED_TO_NATIVE:
246 memset (res, 0, sizeof (MonoJitInfo));
247 res->method = frame.method;
250 case FRAME_TYPE_DEBUGGER_INVOKE: {
254 * The normal exception handling code can't handle this frame, so just
257 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
258 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
262 g_assert_not_reached ();
267 /* mono_find_jit_info:
269 * This function is used to gather information from @ctx. It return the
270 * MonoJitInfo of the corresponding function, unwinds one stack frame and
271 * stores the resulting context into @new_ctx. It also stores a string
272 * describing the stack location into @trace (if not NULL), and modifies
273 * the @lmf if necessary. @native_offset return the IP offset from the
274 * start of the function or -1 if that info is not available.
277 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
278 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
282 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
294 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
296 if (ji == (gpointer)-1)
299 if (managed2 || (ji && ji->method->wrapper_type)) {
300 const char *real_ip, *start;
303 start = (const char *)ji->code_start;
305 /* ctx->ip points into native code */
306 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
308 real_ip = (const char*)ip;
310 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
311 offset = real_ip - start;
316 *native_offset = offset;
319 if (!ji->method->wrapper_type || ji->method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
323 *trace = mono_debug_print_stack_frame (ji->method, offset, domain);
326 char *fname = mono_method_full_name (res->method, TRUE);
327 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
336 * mono_find_jit_info_ext:
338 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
340 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
341 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
342 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
343 * to obtain the last managed frame.
344 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
345 * On return, it will be filled with the locations where callee saved registers are saved
346 * by the current frame. This is returned outside of StackFrameInfo because it can be
347 * quite large on some platforms.
350 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
351 MonoJitInfo *prev_ji, MonoContext *ctx,
352 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
353 mgreg_t **save_locations,
354 StackFrameInfo *frame)
357 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
359 MonoDomain *target_domain;
364 /* Avoid costly table lookup during stack overflow */
365 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
368 ji = mini_jit_info_table_find (domain, ip, &target_domain);
371 target_domain = domain;
374 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
376 err = mono_arch_find_jit_info (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
380 if (frame->type == FRAME_TYPE_MANAGED) {
381 if (!frame->ji->method->wrapper_type || frame->ji->method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
382 frame->managed = TRUE;
385 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
387 * This type of frame is just a marker, the caller should unwind once more to get the
388 * last managed frame.
391 frame->method = NULL;
394 frame->native_offset = -1;
395 frame->domain = target_domain;
399 if (frame->type == FRAME_TYPE_MANAGED)
400 frame->method = ji->method;
402 if (ji && (frame->managed || ji->method->wrapper_type)) {
403 const char *real_ip, *start;
405 start = (const char *)ji->code_start;
407 /* ctx->ip points into native code */
408 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
410 real_ip = (const char*)ip;
412 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
413 frame->native_offset = real_ip - start;
415 frame->native_offset = -1;
418 *trace = mono_debug_print_stack_frame (ji->method, frame->native_offset, domain);
420 if (trace && frame->method) {
421 char *fname = mono_method_full_name (frame->method, TRUE);
422 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
431 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
433 MonoGenericJitInfo *gi;
436 if (!ji->has_generic_jit_info)
438 gi = mono_jit_info_get_generic_jit_info (ji);
444 * Search location list if available, it contains the precise location of the
445 * argument for every pc offset, even if the method was interrupted while it was in
449 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
452 for (i = 0; i < gi->nlocs; ++i) {
453 MonoDwarfLocListEntry *entry = &gi->locations [i];
455 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
457 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
459 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
463 g_assert (i < gi->nlocs);
466 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
468 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
472 if (mono_method_get_context (ji->method)->method_inst) {
474 } else if ((ji->method->flags & METHOD_ATTRIBUTE_STATIC) || ji->method->klass->valuetype) {
477 /* Avoid returning a managed object */
478 MonoObject *this_obj = info;
480 return this_obj->vtable->klass;
484 static MonoGenericContext
485 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
487 MonoGenericContext context = { NULL, NULL };
488 MonoClass *class, *method_container_class;
490 g_assert (generic_info);
492 g_assert (ji->method->is_inflated);
493 if (mono_method_get_context (ji->method)->method_inst) {
494 MonoMethodRuntimeGenericContext *mrgctx = generic_info;
496 class = mrgctx->class_vtable->klass;
497 context.method_inst = mrgctx->method_inst;
498 g_assert (context.method_inst);
499 } else if ((ji->method->flags & METHOD_ATTRIBUTE_STATIC) || ji->method->klass->valuetype) {
500 MonoVTable *vtable = generic_info;
502 class = vtable->klass;
504 class = generic_info;
507 //g_assert (!ji->method->klass->generic_container);
508 if (ji->method->klass->generic_class)
509 method_container_class = ji->method->klass->generic_class->container_class;
511 method_container_class = ji->method->klass;
513 /* class might refer to a subclass of ji->method's class */
514 while (!(class == ji->method->klass || (class->generic_class && class->generic_class->container_class == method_container_class))) {
515 class = class->parent;
519 if (class->generic_class || class->generic_container)
520 context.class_inst = mini_class_get_context (class)->class_inst;
522 if (class->generic_class)
523 g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
525 g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
531 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
533 MonoGenericContext context;
536 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
538 context = get_generic_context_from_stack_frame (ji, generic_info);
540 method = mono_method_get_declaring_generic_method (ji->method);
541 method = mono_class_inflate_generic_method (method, &context);
547 * mono_exception_walk_native_trace:
548 * @ex: The exception object whose frames should be walked
549 * @func: callback to call for each stack frame
550 * @user_data: data passed to the callback
552 * This function walks the stacktrace of an exception. For
553 * each frame the callback function is called with the relevant info.
554 * The walk ends when no more stack frames are found or when the callback
555 * returns a TRUE value.
559 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
561 MonoDomain *domain = mono_domain_get ();
562 MonoArray *ta = ex->trace_ips;
568 len = mono_array_length (ta) >> 1;
569 for (i = 0; i < len; i++) {
570 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
571 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
572 MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
575 if (func (NULL, ip, 0, FALSE, user_data))
578 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
579 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
588 ves_icall_System_Exception_get_trace (MonoException *ex)
590 MonoDomain *domain = mono_domain_get ();
592 MonoArray *ta = ex->trace_ips;
597 /* Exception is not thrown yet */
600 len = mono_array_length (ta) >> 1;
601 trace_str = g_string_new ("");
602 for (i = 0; i < len; i++) {
604 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
605 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
607 ji = mono_jit_info_table_find (domain, ip);
609 /* Unmanaged frame */
610 g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
614 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
616 address = (char *)ip - (char *)ji->code_start;
617 location = mono_debug_print_stack_frame (
618 method, address, ex->object.vtable->domain);
620 g_string_append_printf (trace_str, "%s\n", location);
625 res = mono_string_new (ex->object.vtable->domain, trace_str->str);
626 g_string_free (trace_str, TRUE);
632 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
634 MonoDomain *domain = mono_domain_get ();
636 MonoArray *ta = exc->trace_ips;
637 MonoDebugSourceLocation *location;
641 /* Exception is not thrown yet */
642 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
645 len = mono_array_length (ta) >> 1;
647 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
649 for (i = skip; i < len; i++) {
651 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
652 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
653 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
656 ji = mono_jit_info_table_find (domain, ip);
658 /* Unmanaged frame */
659 mono_array_setref (res, i, sf);
663 g_assert (ji != NULL);
665 method = get_method_from_stack_frame (ji, generic_info);
666 if (ji->method->wrapper_type) {
670 s = mono_method_full_name (method, TRUE);
671 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
675 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
676 sf->native_offset = (char *)ip - (char *)ji->code_start;
679 * mono_debug_lookup_source_location() returns both the file / line number information
680 * and the IL offset. Note that computing the IL offset is already an expensive
681 * operation, so we shouldn't call this method twice.
683 location = mono_debug_lookup_source_location (ji->method, sf->native_offset, domain);
685 sf->il_offset = location->il_offset;
689 if (need_file_info) {
690 if (location && location->source_file) {
691 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
692 sf->line = location->row;
693 sf->column = location->column;
695 sf->line = sf->column = 0;
700 mono_debug_free_source_location (location);
701 mono_array_setref (res, i, sf);
708 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
711 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
712 if (jit_tls && jit_tls->orig_ex_ctx_set)
713 start_ctx = &jit_tls->orig_ex_ctx;
715 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
718 * mono_walk_stack_with_ctx:
720 * Unwind the current thread starting at @start_ctx.
722 * If @start_ctx is null, we capture the current context.
725 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
727 MonoContext extra_ctx;
728 MonoInternalThread *thread = mono_thread_internal_current ();
729 MONO_ARCH_CONTEXT_DEF
731 if (!thread || !thread->jit_data)
735 mono_arch_flush_register_windows ();
737 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
738 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
740 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
742 start_ctx = &extra_ctx;
745 mono_walk_stack_full (func, start_ctx, mono_domain_get (), thread->jit_data, mono_get_lmf (), unwind_options, user_data);
749 * mono_walk_stack_with_state:
751 * Unwind a thread described by @state.
753 * State must be valid (state->valid == TRUE).
755 * If you are using this function to unwind another thread, make sure it is suspended.
757 * If @state is null, we capture the current context.
760 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
762 MonoThreadUnwindState extra_state;
764 if (!mono_thread_state_init_from_current (&extra_state))
766 state = &extra_state;
769 g_assert (state->valid);
771 mono_walk_stack_full (func,
773 state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
774 state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
775 state->unwind_data [MONO_UNWIND_DATA_LMF],
776 unwind_options, user_data);
780 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
782 MonoThreadUnwindState state;
783 if (!mono_thread_state_init_from_current (&state))
785 mono_walk_stack_with_state (func, &state, options, user_data);
789 * mono_walk_stack_full:
790 * @func: callback to call for each stack frame
791 * @domain: starting appdomain, can be NULL to use the current domain
792 * @unwind_options: what extra information the unwinder should gather
793 * @start_ctx: starting state of the stack walk, can be NULL.
794 * @thread: the thread whose stack to walk, can be NULL to use the current thread
795 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
796 * @user_data: data passed to the callback
798 * This function walks the stack of a thread, starting from the state
799 * represented by start_ctx. For each frame the callback
800 * function is called with the relevant info. The walk ends when no more
801 * managed stack frames are found or when the callback returns a TRUE value.
804 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
807 MonoContext ctx, new_ctx;
808 StackFrameInfo frame;
810 mgreg_t *reg_locations [MONO_MAX_IREGS];
811 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
812 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
814 g_assert (start_ctx);
817 /*The LMF will be null if the target have no managed frames.*/
818 /* g_assert (lmf); */
820 memcpy (&ctx, start_ctx, sizeof (MonoContext));
821 memset (reg_locations, 0, sizeof (reg_locations));
823 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
825 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
829 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji) {
830 MonoDebugSourceLocation *source;
832 source = mono_debug_lookup_source_location (frame.ji->method, frame.native_offset, domain);
833 il_offset = source ? source->il_offset : -1;
834 mono_debug_free_source_location (source);
838 frame.il_offset = il_offset;
840 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji) {
841 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
843 frame.actual_method = frame.method;
846 if (get_reg_locations)
847 frame.reg_locations = reg_locations;
849 if (func (&frame, &ctx, user_data))
852 if (get_reg_locations) {
853 for (i = 0; i < MONO_MAX_IREGS; ++i)
854 if (new_reg_locations [i])
855 reg_locations [i] = new_reg_locations [i];
863 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
864 MonoReflectionMethod **method,
865 gint32 *iloffset, gint32 *native_offset,
866 MonoString **file, gint32 *line, gint32 *column)
868 MonoDomain *domain = mono_domain_get ();
869 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
870 MonoLMF *lmf = mono_get_lmf ();
871 MonoJitInfo *ji = NULL;
872 MonoContext ctx, new_ctx;
873 MonoDebugSourceLocation *location;
874 MonoMethod *actual_method;
875 StackFrameInfo frame;
878 MONO_ARCH_CONTEXT_DEF;
880 mono_arch_flush_register_windows ();
882 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
883 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
885 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
891 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
895 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE || frame.type == FRAME_TYPE_DEBUGGER_INVOKE)
899 *native_offset = frame.native_offset;
901 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
902 if (ji->method->wrapper_type != MONO_WRAPPER_NONE && ji->method->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && ji->method->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
907 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
909 mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
911 location = mono_debug_lookup_source_location (ji->method, *native_offset, domain);
913 *iloffset = location->il_offset;
917 if (need_file_info) {
919 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
920 *line = location->row;
921 *column = location->column;
928 mono_debug_free_source_location (location);
935 MonoSecurityFrame *frame;
936 } MonoFrameSecurityInfo;
939 callback_get_first_frame_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
941 MonoFrameSecurityInfo *si = (MonoFrameSecurityInfo*) data;
942 MonoJitInfo *ji = frame->ji;
947 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
948 if (ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
949 ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
950 ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
951 ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
952 ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
961 si->frame = mono_declsec_create_frame (frame->domain, ji);
963 /* Stop - we only want the first frame (e.g. LinkDemand and InheritanceDemand) */
968 * ves_icall_System_Security_SecurityFrame_GetSecurityFrame:
969 * @skip: the number of stack frames to skip
971 * This function returns a the security informations of a single stack frame
972 * (after the skipped ones). This is required for [NonCas]LinkDemand[Choice]
973 * and [NonCas]InheritanceDemand[Choice] as only the caller security is
977 ves_icall_System_Security_SecurityFrame_GetSecurityFrame (gint32 skip)
979 MonoFrameSecurityInfo si;
984 mono_walk_stack (callback_get_first_frame_security_info, MONO_UNWIND_DEFAULT, &si);
986 return (si.skips == 0) ? si.frame : NULL;
998 grow_array (MonoSecurityStack *stack)
1000 MonoDomain *domain = mono_domain_get ();
1001 guint32 newsize = (stack->maximum << 1);
1002 MonoArray *newstack = mono_array_new (domain, mono_defaults.runtimesecurityframe_class, newsize);
1004 for (i=0; i < stack->maximum; i++) {
1005 gpointer frame = mono_array_get (stack->stack, gpointer, i);
1006 mono_array_setref (newstack, i, frame);
1008 stack->maximum = newsize;
1009 stack->stack = newstack;
1013 callback_get_stack_frames_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
1015 MonoSecurityStack *ss = (MonoSecurityStack*) data;
1016 MonoJitInfo *ji = frame->ji;
1021 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
1022 if (ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1023 ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1024 ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
1025 ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
1026 ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1030 if (ss->skips > 0) {
1035 if (ss->count == ss->maximum)
1038 mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (frame->domain, ji));
1040 /* continue down the stack */
1045 glist_to_array (GList *list, MonoClass *eclass)
1047 MonoDomain *domain = mono_domain_get ();
1054 len = g_list_length (list);
1055 res = mono_array_new (domain, eclass, len);
1057 for (i = 0; list; list = list->next, i++)
1058 mono_array_set (res, gpointer, i, list->data);
1064 * ves_icall_System_Security_SecurityFrame_GetSecurityStack:
1065 * @skip: the number of stack frames to skip
1067 * This function returns an managed array of containing the security
1068 * informations for each frame (after the skipped ones). This is used for
1069 * [NonCas]Demand[Choice] where the complete evaluation of the stack is
1073 ves_icall_System_Security_SecurityFrame_GetSecurityStack (gint32 skip)
1075 MonoSecurityStack ss;
1077 #if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
1083 ss.maximum = MONO_CAS_INITIAL_STACK_SIZE;
1084 ss.stack = mono_array_new (mono_domain_get (), mono_defaults.runtimesecurityframe_class, ss.maximum);
1085 mono_walk_stack (callback_get_stack_frames_security_info, MONO_UNWIND_DEFAULT, &ss);
1086 /* g_warning ("STACK RESULT: %d out of %d", ss.count, ss.maximum); */
1091 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1093 MonoClass *catch_class = ei->data.catch_class;
1094 MonoType *inflated_type;
1095 MonoGenericContext context;
1097 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1098 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1101 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1103 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1105 /* FIXME: we shouldn't inflate but instead put the
1106 type in the rgctx and fetch it from there. It
1107 might be a good idea to do this lazily, i.e. only
1108 when the exception is actually thrown, so as not to
1109 waste space for exception clauses which might never
1111 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1112 catch_class = mono_class_from_mono_type (inflated_type);
1113 mono_metadata_free_type (inflated_type);
1119 * mini_jit_info_table_find:
1121 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1122 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1123 * OUT_DOMAIN if it is not NULL.
1126 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1129 MonoInternalThread *t = mono_thread_internal_current ();
1135 ji = mono_jit_info_table_find (domain, addr);
1138 *out_domain = domain;
1142 /* maybe it is shared code, so we also search in the root domain */
1143 if (domain != mono_get_root_domain ()) {
1144 ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
1147 *out_domain = mono_get_root_domain ();
1152 refs = (t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL;
1153 for (; refs && *refs; refs++) {
1154 if (*refs != domain && *refs != mono_get_root_domain ()) {
1155 ji = mono_jit_info_table_find ((MonoDomain*) *refs, addr);
1158 *out_domain = (MonoDomain*) *refs;
1168 * wrap_non_exception_throws:
1170 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1171 * WrapNonExceptionThrows flag set.
1174 wrap_non_exception_throws (MonoMethod *m)
1176 MonoAssembly *ass = m->klass->image->assembly;
1177 MonoCustomAttrInfo* attrs;
1178 static MonoClass *klass;
1180 gboolean val = FALSE;
1183 if (ass->wrap_non_exception_throws_inited)
1184 return ass->wrap_non_exception_throws;
1186 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1188 attrs = mono_custom_attrs_from_assembly (ass);
1190 for (i = 0; i < attrs->num_attrs; ++i) {
1191 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1193 int len, num_named, named_type, data_type, name_len;
1196 if (!attr->ctor || attr->ctor->klass != klass)
1198 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1199 len = attr->data_size;
1200 p = (const char*)attr->data;
1201 g_assert (read16 (p) == 0x0001);
1203 num_named = read16 (p);
1212 if (named_type != 0x54)
1214 name_len = mono_metadata_decode_blob_size (p, &p);
1215 name = g_malloc (name_len + 1);
1216 memcpy (name, p, name_len);
1217 name [name_len] = 0;
1219 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1221 /* The value is a BOOLEAN */
1224 mono_custom_attrs_free (attrs);
1227 ass->wrap_non_exception_throws = val;
1228 mono_memory_barrier ();
1229 ass->wrap_non_exception_throws_inited = TRUE;
1234 #ifndef MONO_ARCH_STACK_GROWS_UP
1235 #define DOES_STACK_GROWS_UP 1
1237 #define DOES_STACK_GROWS_UP 0
1240 #define MAX_UNMANAGED_BACKTRACE 128
1242 build_native_trace (void)
1244 /* This puppy only makes sense on mobile, IOW, ARM. */
1245 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1247 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1248 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1253 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1255 for (i = 0; i < size; i++)
1256 mono_array_set (res, gpointer, i, native_trace [i]);
1263 #define setup_managed_stacktrace_information() do { \
1264 if (mono_ex && !initial_trace_ips) { \
1265 trace_ips = g_list_reverse (trace_ips); \
1266 MONO_OBJECT_SETREF (mono_ex, trace_ips, glist_to_array (trace_ips, mono_defaults.int_class)); \
1267 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ()); \
1268 if (has_dynamic_methods) \
1269 /* These methods could go away anytime, so compute the stack trace now */ \
1270 MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex)); \
1272 g_list_free (trace_ips); \
1276 * mono_handle_exception_internal_first_pass:
1278 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1279 * OBJ is found. Run the index of the filter clause which caught the exception into
1280 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1283 mono_handle_exception_internal_first_pass (MonoContext *ctx, gpointer obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1285 MonoDomain *domain = mono_domain_get ();
1286 MonoJitInfo *ji = NULL;
1287 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1288 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1289 MonoLMF *lmf = mono_get_lmf ();
1290 MonoArray *initial_trace_ips = NULL;
1291 GList *trace_ips = NULL;
1292 MonoException *mono_ex;
1293 gboolean stack_overflow = FALSE;
1294 MonoContext initial_ctx;
1295 int frame_count = 0;
1296 gboolean has_dynamic_methods = FALSE;
1301 g_assert (ctx != NULL);
1303 if (obj == domain->stack_overflow_ex)
1304 stack_overflow = TRUE;
1306 mono_ex = (MonoException*)obj;
1307 initial_trace_ips = mono_ex->trace_ips;
1309 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1310 mono_ex = (MonoException*)obj;
1311 initial_trace_ips = mono_ex->trace_ips;
1317 call_filter = mono_get_call_filter ();
1319 g_assert (jit_tls->end_of_stack);
1320 g_assert (jit_tls->abort_func);
1323 *out_filter_idx = -1;
1327 *out_prev_ji = NULL;
1332 MonoContext new_ctx;
1334 int clause_index_start = 0;
1335 gboolean unwind_res = TRUE;
1337 StackFrameInfo frame;
1342 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1344 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1348 g_assert (frame.type == FRAME_TYPE_MANAGED);
1353 setup_managed_stacktrace_information ();
1358 //printf ("M: %s %d.\n", mono_method_full_name (ji->method, TRUE), frame_count);
1360 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && ji->method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1361 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1362 "The native frame called the managed method:\n%s\n",
1363 mono_method_full_name (ji->method, TRUE));
1366 if (ji->method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1368 * Avoid overwriting the stack trace if the exception is
1369 * rethrown. Also avoid giant stack traces during a stack
1372 if (!initial_trace_ips && (frame_count < 1000)) {
1373 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1374 trace_ips = g_list_prepend (trace_ips,
1375 get_generic_info_from_stack_frame (ji, ctx));
1379 if (ji->method->dynamic)
1380 has_dynamic_methods = TRUE;
1382 if (stack_overflow) {
1383 if (DOES_STACK_GROWS_UP)
1384 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1386 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1388 free_stack = 0xffffff;
1391 for (i = clause_index_start; i < ji->num_clauses; i++) {
1392 MonoJitExceptionInfo *ei = &ji->clauses [i];
1393 gboolean filtered = FALSE;
1396 * During stack overflow, wait till the unwinding frees some stack
1397 * space before running handlers/finalizers.
1399 if (free_stack <= (64 * 1024))
1402 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1404 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1407 * Have to unwrap RuntimeWrappedExceptions if the
1408 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1410 if (non_exception && !wrap_non_exception_throws (ji->method))
1411 ex_obj = non_exception;
1415 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1416 gboolean is_user_frame = ji->method->wrapper_type == MONO_WRAPPER_NONE || ji->method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1417 #ifndef DISABLE_PERFCOUNTERS
1418 mono_perfcounters->exceptions_filters++;
1420 mono_debugger_call_exception_handler (ei->data.filter, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1423 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1424 trim the stackframe since if it returns FALSE we lose information.
1426 FIXME Not 100% sure if it's a good idea even with user clauses.
1429 setup_managed_stacktrace_information ();
1431 if (ji->from_llvm) {
1432 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1433 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1435 g_assert_not_reached ();
1438 /* store the exception object in bp + ei->exvar_offset */
1439 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1442 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1443 filtered = call_filter (ctx, ei->data.filter);
1444 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1445 if (filtered && out_filter_idx)
1446 *out_filter_idx = filter_idx;
1453 setup_managed_stacktrace_information ();
1454 /* mono_debugger_agent_handle_exception () needs this */
1455 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1460 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1461 setup_managed_stacktrace_information ();
1466 /* mono_debugger_agent_handle_exception () needs this */
1467 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1476 g_assert_not_reached ();
1480 * mono_handle_exception_internal:
1481 * @ctx: saved processor state
1482 * @obj: the exception object
1483 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1486 mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gboolean resume, MonoJitInfo **out_ji)
1488 MonoDomain *domain = mono_domain_get ();
1489 MonoJitInfo *ji, *prev_ji;
1490 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1491 static void (*restore_context) (void *);
1492 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1493 MonoLMF *lmf = mono_get_lmf ();
1494 MonoException *mono_ex;
1495 gboolean stack_overflow = FALSE;
1496 MonoContext initial_ctx;
1497 int frame_count = 0;
1498 gint32 filter_idx, first_filter_idx;
1501 MonoObject *non_exception = NULL;
1503 g_assert (ctx != NULL);
1505 MonoException *ex = mono_get_exception_null_reference ();
1506 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1507 obj = (MonoObject *)ex;
1511 * Allocate a new exception object instead of the preconstructed ones.
1513 if (obj == domain->stack_overflow_ex) {
1515 * It is not a good idea to try and put even more pressure on the little stack available.
1516 * obj = mono_get_exception_stack_overflow ();
1518 stack_overflow = TRUE;
1520 else if (obj == domain->null_reference_ex) {
1521 obj = mono_get_exception_null_reference ();
1524 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1525 non_exception = obj;
1526 obj = mono_get_exception_runtime_wrapped (obj);
1529 mono_ex = (MonoException*)obj;
1531 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1532 mono_ex = (MonoException*)obj;
1537 if (mono_ex && jit_tls->class_cast_from) {
1538 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1539 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1540 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1541 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1542 mono_ex->message = mono_string_new (domain, msg);
1547 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1548 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1549 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1550 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1551 mono_ex->message = mono_string_new (domain, msg);
1559 call_filter = mono_get_call_filter ();
1561 if (!restore_context)
1562 restore_context = mono_get_restore_context ();
1564 g_assert (jit_tls->end_of_stack);
1565 g_assert (jit_tls->abort_func);
1568 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1569 * end up being TRUE on any code path.
1571 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1576 MonoContext ctx_cp = *ctx;
1577 if (mono_trace_is_enabled ()) {
1578 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1579 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1580 MonoObject *message;
1581 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1583 MonoObject *exc = NULL;
1584 if (get_message == NULL) {
1586 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1588 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1590 message = mono_runtime_invoke (get_message, obj, NULL, &exc);
1594 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1596 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1598 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1599 mono_print_thread_dump_from_ctx (ctx);
1601 jit_tls->orig_ex_ctx_set = TRUE;
1602 mono_profiler_exception_thrown (obj);
1603 jit_tls->orig_ex_ctx_set = FALSE;
1605 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1608 if (mini_get_debug_options ()->break_on_exc)
1610 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1612 if (mini_get_debug_options ()->suspend_on_unhandled) {
1613 mono_runtime_printf_err ("Unhandled exception, suspending...");
1618 // FIXME: This runs managed code so it might cause another stack overflow when
1619 // we are handling a stack overflow
1620 mono_unhandled_exception (obj);
1622 gboolean unhandled = FALSE;
1625 * The exceptions caught by the mono_runtime_invoke () calls in mono_async_invoke () needs to be treated as
1626 * unhandled (#669836).
1627 * FIXME: The check below is hackish, but its hard to distinguish these runtime invoke calls from others
1630 if (ji && ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1632 MonoInternalThread *thread = mono_thread_internal_current ();
1633 if (prev_ji->method == thread->async_invoke_method)
1638 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1640 mono_debugger_agent_handle_exception (obj, ctx, &ctx_cp);
1650 MonoContext new_ctx;
1652 int clause_index_start = 0;
1653 gboolean unwind_res = TRUE;
1657 ji = jit_tls->resume_state.ji;
1658 new_ctx = jit_tls->resume_state.new_ctx;
1659 clause_index_start = jit_tls->resume_state.clause_index;
1660 lmf = jit_tls->resume_state.lmf;
1661 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1662 filter_idx = jit_tls->resume_state.filter_idx;
1664 StackFrameInfo frame;
1666 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1668 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1672 g_assert (frame.type == FRAME_TYPE_MANAGED);
1678 *(mono_get_lmf_addr ()) = lmf;
1680 jit_tls->abort_func (obj);
1681 g_assert_not_reached ();
1685 //printf ("M: %s %d.\n", mono_method_full_name (ji->method, TRUE), frame_count);
1687 if (stack_overflow) {
1688 if (DOES_STACK_GROWS_UP)
1689 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1691 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1693 free_stack = 0xffffff;
1696 for (i = clause_index_start; i < ji->num_clauses; i++) {
1697 MonoJitExceptionInfo *ei = &ji->clauses [i];
1698 gboolean filtered = FALSE;
1701 * During stack overflow, wait till the unwinding frees some stack
1702 * space before running handlers/finalizers.
1704 if (free_stack <= (64 * 1024))
1707 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1709 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1712 * Have to unwrap RuntimeWrappedExceptions if the
1713 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1715 if (non_exception && !wrap_non_exception_throws (ji->method))
1716 ex_obj = non_exception;
1720 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1721 if (ji->from_llvm) {
1722 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1723 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1725 g_assert_not_reached ();
1728 /* store the exception object in bp + ei->exvar_offset */
1729 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1733 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1735 * Filter clauses should only be run in the
1736 * first pass of exception handling.
1738 filtered = (filter_idx == first_filter_idx);
1742 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1743 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1745 * This guards against the situation that we abort a thread that is executing a finally clause
1746 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1747 * check for this situation here and resume interruption if we are below the guarded block.
1749 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1750 gboolean is_outside = FALSE;
1751 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1752 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1753 //FIXME make this stack direction aware
1754 if (catch_bp > prot_bp) {
1756 } else if (catch_bp == prot_bp) {
1757 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1758 * So we check if the catch handler_start is protected by the guarded handler protected region
1761 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1762 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1763 * There aren't any further finally/fault handler blocks down the stack over this exception.
1764 * This must be ensured by the code that installs the guard trampoline.
1766 g_assert (ji == mini_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1768 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1773 jit_tls->handler_block_return_address = NULL;
1774 jit_tls->handler_block = NULL;
1775 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1779 if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
1780 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
1781 jit_tls->orig_ex_ctx_set = TRUE;
1782 mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
1783 jit_tls->orig_ex_ctx_set = FALSE;
1784 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1785 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1786 *(mono_get_lmf_addr ()) = lmf;
1787 #ifndef DISABLE_PERFCOUNTERS
1788 mono_perfcounters->exceptions_depth += frame_count;
1790 if (obj == domain->stack_overflow_ex)
1791 jit_tls->handling_stack_ovf = FALSE;
1795 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1796 (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
1797 if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
1798 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
1799 jit_tls->orig_ex_ctx_set = TRUE;
1800 mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
1801 jit_tls->orig_ex_ctx_set = FALSE;
1802 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1803 call_filter (ctx, ei->handler_start);
1805 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1806 (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
1807 if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
1808 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
1809 jit_tls->orig_ex_ctx_set = TRUE;
1810 mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
1811 jit_tls->orig_ex_ctx_set = FALSE;
1812 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1813 #ifndef DISABLE_PERFCOUNTERS
1814 mono_perfcounters->exceptions_finallys++;
1816 *(mono_get_lmf_addr ()) = lmf;
1817 if (ji->from_llvm) {
1819 * LLVM compiled finally handlers follow the design
1820 * of the c++ ehabi, i.e. they call a resume function
1821 * at the end instead of returning to the caller.
1822 * So save the exception handling state,
1823 * mono_resume_unwind () will call us again to continue
1826 jit_tls->resume_state.ex_obj = obj;
1827 jit_tls->resume_state.ji = ji;
1828 jit_tls->resume_state.clause_index = i + 1;
1829 jit_tls->resume_state.ctx = *ctx;
1830 jit_tls->resume_state.new_ctx = new_ctx;
1831 jit_tls->resume_state.lmf = lmf;
1832 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1833 jit_tls->resume_state.filter_idx = filter_idx;
1834 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1837 call_filter (ctx, ei->handler_start);
1843 jit_tls->orig_ex_ctx_set = TRUE;
1844 mono_profiler_exception_method_leave (ji->method);
1845 jit_tls->orig_ex_ctx_set = FALSE;
1850 g_assert_not_reached ();
1854 * mono_debugger_handle_exception:
1856 * Notify the debugger about exceptions. Returns TRUE if the debugger wants us to stop
1857 * at the exception and FALSE to resume with the normal exception handling.
1859 * The arch code is responsible to setup @ctx in a way that MONO_CONTEXT_GET_IP () and
1860 * MONO_CONTEXT_GET_SP () point to the throw instruction; ie. before executing the
1861 * `callq throw' instruction.
1864 mono_debugger_handle_exception (MonoContext *ctx, MonoObject *obj)
1866 MonoDebuggerExceptionAction action;
1868 if (!mono_debug_using_mono_debugger ())
1872 MonoException *ex = mono_get_exception_null_reference ();
1873 MONO_OBJECT_SETREF (ex, message, mono_string_new (mono_domain_get (), "Object reference not set to an instance of an object"));
1874 obj = (MonoObject *)ex;
1877 action = _mono_debugger_throw_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1879 if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP) {
1881 * The debugger wants us to stop on the `throw' instruction.
1882 * By the time we get here, it already inserted a breakpoint there.
1885 } else if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED) {
1886 MonoContext ctx_cp = *ctx;
1887 MonoJitInfo *ji = NULL;
1891 * The debugger wants us to stop only if this exception is user-unhandled.
1894 ret = mono_handle_exception_internal_first_pass (&ctx_cp, obj, NULL, &ji, NULL, NULL);
1895 if (ret && (ji != NULL) && (ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE)) {
1897 * The exception is handled in a runtime-invoke wrapper, that means that it's unhandled
1898 * inside the method being invoked, so we handle it like a user-unhandled exception.
1905 * The exception is user-unhandled - tell the debugger to stop.
1907 return _mono_debugger_unhandled_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1911 * The exception is catched somewhere - resume with the normal exception handling and don't
1912 * stop in the debugger.
1920 * mono_debugger_run_finally:
1921 * @start_ctx: saved processor state
1923 * This method is called by the Mono Debugger to call all `finally' clauses of the
1924 * current stack frame. It's used when the user issues a `return' command to make
1925 * the current stack frame return. After returning from this method, the debugger
1926 * unwinds the stack one frame and gives control back to the user.
1928 * NOTE: This method is only used when running inside the Mono Debugger.
1931 mono_debugger_run_finally (MonoContext *start_ctx)
1933 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1934 MonoDomain *domain = mono_domain_get ();
1935 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1936 MonoLMF *lmf = mono_get_lmf ();
1937 MonoContext ctx, new_ctx;
1938 MonoJitInfo *ji, rji;
1943 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1944 if (!ji || ji == (gpointer)-1)
1948 call_filter = mono_get_call_filter ();
1950 for (i = 0; i < ji->num_clauses; i++) {
1951 MonoJitExceptionInfo *ei = &ji->clauses [i];
1953 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1954 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1955 call_filter (&ctx, ei->handler_start);
1961 * mono_handle_exception:
1962 * @ctx: saved processor state
1963 * @obj: the exception object
1966 mono_handle_exception (MonoContext *ctx, gpointer obj)
1968 #ifndef DISABLE_PERFCOUNTERS
1969 mono_perfcounters->exceptions_thrown++;
1972 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1975 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1977 #ifndef MONO_ARCH_USE_SIGACTION
1978 #error "Can't use sigaltstack without sigaction"
1981 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
1984 mono_setup_altstack (MonoJitTlsData *tls)
1988 guint8 *staddr = NULL;
1990 if (mono_running_on_valgrind ())
1993 mono_thread_get_stack_bounds (&staddr, &stsize);
1997 tls->end_of_stack = staddr + stsize;
1998 tls->stack_size = stsize;
2000 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2002 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2003 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2005 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2007 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2008 /* mprotect can fail for the main thread stack */
2009 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);
2010 g_assert (gaddr == tls->stack_ovf_guard_base);
2011 tls->stack_ovf_valloced = TRUE;
2014 /* Setup an alternate signal stack */
2015 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
2016 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2018 g_assert (tls->signal_stack);
2020 sa.ss_sp = tls->signal_stack;
2021 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2023 g_assert (sigaltstack (&sa, NULL) == 0);
2025 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);
2029 mono_free_altstack (MonoJitTlsData *tls)
2034 sa.ss_sp = tls->signal_stack;
2035 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2036 sa.ss_flags = SS_DISABLE;
2037 err = sigaltstack (&sa, NULL);
2038 g_assert (err == 0);
2040 if (tls->signal_stack)
2041 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
2042 if (tls->stack_ovf_valloced)
2043 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
2045 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2048 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2051 mono_setup_altstack (MonoJitTlsData *tls)
2056 mono_free_altstack (MonoJitTlsData *tls)
2060 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2063 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2065 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2066 /* we need to leave some room for throwing the exception */
2067 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2068 unprotect_size -= mono_pagesize ();
2069 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2070 * is sufficient stack
2072 //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);
2074 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2075 return unprotect_size == jit_tls->stack_ovf_guard_size;
2078 static G_GNUC_UNUSED void
2079 try_more_restore (void)
2081 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2082 if (try_restore_stack_protection (jit_tls, 500))
2083 jit_tls->restore_stack_prot = NULL;
2086 static G_GNUC_UNUSED void
2087 restore_stack_protection (void)
2089 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2090 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2091 /* if we can't restore the stack protection, keep a callback installed so
2092 * we'll try to restore as much stack as we can at each return from unmanaged
2095 if (try_restore_stack_protection (jit_tls, 4096))
2096 jit_tls->restore_stack_prot = NULL;
2098 jit_tls->restore_stack_prot = try_more_restore_tramp;
2099 /* here we also throw a stack overflow exception */
2100 ex->trace_ips = NULL;
2101 ex->stack_trace = NULL;
2102 mono_raise_exception (ex);
2106 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2108 void (*func)(void) = (gpointer)tramp_data;
2114 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2116 /* we got a stack overflow in the soft-guard pages
2117 * There are two cases:
2118 * 1) managed code caused the overflow: we unprotect the soft-guard page
2119 * and let the arch-specific code trigger the exception handling mechanism
2120 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2121 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2122 * and hope we can continue with those enabled, at least until the hard-guard page
2123 * is hit. The alternative to continuing here is to just print a message and abort.
2124 * We may add in the future the code to protect the pages again in the codepath
2125 * when we return from unmanaged to managed code.
2127 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2128 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2129 /* we unprotect the minimum amount we can */
2131 gboolean handled = FALSE;
2133 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2134 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2135 guard_size -= mono_pagesize ();
2137 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2138 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2139 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);
2140 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2142 mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
2147 /* We print a message: after this even managed stack overflows
2148 * may crash the runtime
2150 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2151 if (!jit_tls->handling_stack_ovf) {
2152 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2153 jit_tls->handling_stack_ovf = 1;
2155 /*fprintf (stderr, "Already handling stack overflow\n");*/
2164 MonoMethod *omethod;
2166 } PrintOverflowUserData;
2169 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2171 MonoMethod *method = NULL;
2172 PrintOverflowUserData *user_data = data;
2176 method = frame->ji->method;
2179 if (user_data->count == 0) {
2180 /* The first frame is in its prolog, so a line number cannot be computed */
2181 user_data->count ++;
2185 /* If this is a one method overflow, skip the other instances */
2186 if (method == user_data->omethod)
2189 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2190 mono_runtime_printf_err (" %s", location);
2193 if (user_data->count == 1) {
2194 mono_runtime_printf_err (" <...>");
2195 user_data->omethod = method;
2197 user_data->omethod = NULL;
2200 user_data->count ++;
2202 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2208 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2210 PrintOverflowUserData ud;
2213 /* we don't do much now, but we can warn the user with a useful message */
2214 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2216 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2217 mono_arch_sigctx_to_monoctx (ctx, &mctx);
2219 mono_runtime_printf_err ("Stacktrace:");
2221 memset (&ud, 0, sizeof (ud));
2223 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2225 if (ji && ji->method)
2226 mono_runtime_printf_err ("At %s", mono_method_full_name (ji->method, TRUE));
2228 mono_runtime_printf_err ("At <unmanaged>.");
2235 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2237 MonoMethod *method = NULL;
2239 method = frame->ji->method;
2242 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2243 mono_runtime_printf_err (" %s", location);
2246 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2251 static G_GNUC_UNUSED gboolean
2252 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2254 GString *p = (GString*)data;
2255 MonoMethod *method = NULL;
2257 method = frame->ji->method;
2260 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2261 g_string_append_printf (p, " %s\n", location);
2264 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2269 static gboolean handling_sigsegv = FALSE;
2272 * mono_handle_native_sigsegv:
2274 * Handle a SIGSEGV received while in native code by printing diagnostic
2275 * information and aborting.
2278 mono_handle_native_sigsegv (int signal, void *ctx)
2280 #ifdef MONO_ARCH_USE_SIGACTION
2281 struct sigaction sa;
2283 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2284 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2286 if (handling_sigsegv)
2289 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2290 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2295 /* To prevent infinite loops when the stack walk causes a crash */
2296 handling_sigsegv = TRUE;
2298 /* !jit_tls means the thread was not registered with the runtime */
2299 if (jit_tls && mono_thread_internal_current ()) {
2300 mono_runtime_printf_err ("Stacktrace:\n");
2302 mono_walk_stack (print_stack_frame_to_stderr, TRUE, NULL);
2305 #ifdef HAVE_BACKTRACE_SYMBOLS
2311 mono_runtime_printf_err ("\nNative stacktrace:\n");
2313 size = backtrace (array, 256);
2314 names = backtrace_symbols (array, size);
2315 for (i =0; i < size; ++i) {
2316 mono_runtime_printf_err ("\t%s", names [i]);
2320 /* Try to get more meaningful information using gdb */
2322 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2323 if (!mini_get_debug_options ()->no_gdb_backtrace && !mono_debug_using_mono_debugger ()) {
2324 /* From g_spawn_command_line_sync () in eglib */
2327 pid_t crashed_pid = getpid ();
2331 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2332 * it will deadlock. Call the syscall directly instead.
2334 pid = mono_runtime_syscall_fork ();
2337 dup2 (STDERR_FILENO, STDOUT_FILENO);
2339 mono_gdb_render_native_backtraces (crashed_pid);
2343 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2344 waitpid (pid, &status, 0);
2351 * A SIGSEGV indicates something went very wrong so we can no longer depend
2352 * on anything working. So try to print out lots of diagnostics, starting
2353 * with ones which have a greater chance of working.
2355 mono_runtime_printf_err (
2357 "=================================================================\n"
2358 "Got a %s while executing native code. This usually indicates\n"
2359 "a fatal error in the mono runtime or one of the native libraries \n"
2360 "used by your application.\n"
2361 "=================================================================\n",
2365 #ifdef MONO_ARCH_USE_SIGACTION
2367 /* Remove our SIGABRT handler */
2368 sa.sa_handler = SIG_DFL;
2369 sigemptyset (&sa.sa_mask);
2372 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2376 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2377 #if defined (PLATFORM_ANDROID)
2385 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2387 MonoInternalThread *thread = mono_thread_internal_current ();
2388 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2391 GString* text = g_string_new (0);
2392 char *name, *wapi_desc;
2393 GError *error = NULL;
2396 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2398 g_string_append_printf (text, "\n\"%s\"", name);
2401 else if (thread->threadpool_thread)
2402 g_string_append (text, "\n\"<threadpool thread>\"");
2404 g_string_append (text, "\n\"<unnamed thread>\"");
2407 wapi_desc = wapi_current_thread_desc ();
2408 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2412 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2414 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2416 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2418 mono_arch_sigctx_to_monoctx (sigctx, &ctx);
2420 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2422 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2425 mono_runtime_printf ("%s", text->str);
2427 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2428 OutputDebugStringA(text->str);
2431 g_string_free (text, TRUE);
2432 mono_runtime_stdout_fflush ();
2436 * mono_print_thread_dump:
2438 * Print information about the current thread to stdout.
2439 * SIGCTX can be NULL, allowing this to be called from gdb.
2442 mono_print_thread_dump (void *sigctx)
2444 mono_print_thread_dump_internal (sigctx, NULL);
2448 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2450 mono_print_thread_dump_internal (NULL, ctx);
2454 * mono_resume_unwind:
2456 * This is called by a trampoline from LLVM compiled finally clauses to continue
2460 mono_resume_unwind (MonoContext *ctx)
2462 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2463 static void (*restore_context) (MonoContext *);
2464 MonoContext new_ctx;
2466 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2467 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2470 mono_handle_exception_internal (&new_ctx, jit_tls->resume_state.ex_obj, TRUE, NULL);
2472 if (!restore_context)
2473 restore_context = mono_get_restore_context ();
2475 restore_context (&new_ctx);
2478 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2483 MonoJitExceptionInfo *ei;
2484 } FindHandlerBlockData;
2487 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2491 FindHandlerBlockData *pdata = data;
2492 MonoJitInfo *ji = frame->ji;
2497 if (ji->method->wrapper_type)
2500 ip = MONO_CONTEXT_GET_IP (ctx);
2502 for (i = 0; i < ji->num_clauses; ++i) {
2503 MonoJitExceptionInfo *ei = ji->clauses + i;
2504 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2506 /*If ip points to the first instruction it means the handler block didn't start
2507 so we can leave its execution to the EH machinery*/
2508 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2520 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2523 MonoJitExceptionInfo *clause = NULL;
2526 ip = MONO_CONTEXT_GET_IP (ctx);
2528 for (i = 0; i < ji->num_clauses; ++i) {
2529 clause = &ji->clauses [i];
2530 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2532 if (clause->handler_start < ip && clause->data.handler_end > ip)
2536 /*no matching finally */
2537 if (i == ji->num_clauses)
2540 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2541 if (ip == clause->handler_start)
2544 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2548 * Finds the bottom handler block running and install a block guard if needed.
2549 * FIXME add full-aot support.
2552 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2554 FindHandlerBlockData data = { 0 };
2555 MonoJitTlsData *jit_tls = ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2562 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2563 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2565 if (!jit_tls || jit_tls->handler_block_return_address)
2568 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_SIGNAL_SAFE, &data);
2573 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2575 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2576 if (resume_ip == NULL)
2579 jit_tls->handler_block_return_address = resume_ip;
2580 jit_tls->handler_block = data.ei;
2587 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2595 mono_set_cast_details (MonoClass *from, MonoClass *to)
2597 MonoJitTlsData *jit_tls = NULL;
2599 if (mini_get_debug_options ()->better_cast_details) {
2600 jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2601 jit_tls->class_cast_from = from;
2602 jit_tls->class_cast_to = to;
2607 /*returns false if the thread is not attached*/
2609 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2611 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2612 MonoInternalThread *thread = mono_thread_internal_current ();
2613 if (!thread || !thread->jit_data) {
2619 mono_arch_sigctx_to_monoctx (sigctx, &ctx->ctx);
2621 #if MONO_ARCH_HAS_MONO_CONTEXT && !defined(MONO_CROSS_COMPILE)
2622 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2624 g_error ("Use a null sigctx requires a working mono-context");
2627 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2628 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2629 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2633 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2639 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2641 MonoInternalThread *thread = mono_thread_internal_current ();
2642 if (!thread || !thread->jit_data) {
2648 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2649 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2650 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2655 /*returns false if the thread is not attached*/
2657 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2659 MonoInternalThread *thread = mono_thread_internal_current ();
2660 MONO_ARCH_CONTEXT_DEF
2662 mono_arch_flush_register_windows ();
2664 if (!thread || !thread->jit_data) {
2668 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2669 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2671 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2674 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2675 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2676 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2682 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2684 void (*restore_context) (MonoContext *);
2685 restore_context = mono_get_restore_context ();
2687 mono_handle_exception (ctx, exc);
2688 restore_context (ctx);
2691 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2693 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2695 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2696 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2697 jit_tls->ex_ctx = *ctx;
2699 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2701 g_error ("This target doesn't support mono_arch_setup_async_callback");
2706 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2708 unhandled_exception_hook = func;
2709 unhandled_exception_hook_data = user_data;
2713 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2715 if (unhandled_exception_hook) {
2716 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2718 MonoObject *other = NULL;
2719 MonoString *str = mono_object_to_string (exc, &other);
2723 msg = mono_string_to_utf8 (str);
2725 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2726 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2728 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2729 original_backtrace, nested_backtrace);
2731 g_free (original_backtrace);
2732 g_free (nested_backtrace);
2734 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2736 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2738 #if defined(__APPLE__) && defined(__arm__)
2739 g_assertion_message ("Terminating runtime due to unhandled exception");
2741 exit (mono_environment_exitcode_get ());
2745 g_assert_not_reached ();