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>
54 #include "debugger-agent.h"
55 #include "seq-points.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);
90 mono_tramp_info_register (info);
91 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
92 mono_tramp_info_register (info);
93 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
94 mono_tramp_info_register (info);
95 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
96 mono_tramp_info_register (info);
98 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
99 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
100 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
103 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
104 mono_arch_exceptions_init ();
106 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
107 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
108 cbs.mono_raise_exception = mono_get_throw_exception ();
109 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
110 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
111 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
112 mono_install_eh_callbacks (&cbs);
116 mono_get_throw_exception (void)
118 g_assert (throw_exception_func);
119 return throw_exception_func;
123 mono_get_rethrow_exception (void)
125 g_assert (rethrow_exception_func);
126 return rethrow_exception_func;
130 mono_get_call_filter (void)
132 g_assert (call_filter_func);
133 return call_filter_func;
137 mono_get_restore_context (void)
139 g_assert (restore_context_func);
140 return restore_context_func;
144 mono_get_throw_corlib_exception (void)
146 gpointer code = NULL;
149 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
150 if (throw_corlib_exception_func)
151 return throw_corlib_exception_func;
154 code = mono_aot_get_trampoline ("throw_corlib_exception");
156 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
157 mono_tramp_info_register (info);
160 mono_memory_barrier ();
162 throw_corlib_exception_func = code;
164 return throw_corlib_exception_func;
168 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
170 MonoTryBlockHoleTableJitInfo *table;
175 if (ei->try_start > ip || ip >= ei->try_end)
178 if (!ji->has_try_block_holes)
181 table = mono_jit_info_get_try_block_hole_table_info (ji);
182 offset = (guint32)((char*)ip - (char*)ji->code_start);
183 clause = (guint16)(ei - ji->clauses);
184 g_assert (clause < ji->num_clauses);
186 for (i = 0; i < table->num_holes; ++i) {
187 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
188 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
197 * Translate between the mono_arch_find_jit_info function and the old API.
200 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
201 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
203 StackFrameInfo frame;
206 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
208 /* Avoid costly table lookup during stack overflow */
209 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
212 ji = mini_jit_info_table_find (domain, ip, NULL);
217 err = mono_arch_find_jit_info (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
221 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
223 * Remove any unused lmf.
224 * Mask out the lower bits which might be used to hold additional information.
226 *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
229 /* Convert between the new and the old APIs */
230 switch (frame.type) {
231 case FRAME_TYPE_MANAGED:
235 case FRAME_TYPE_MANAGED_TO_NATIVE:
239 memset (res, 0, sizeof (MonoJitInfo));
240 res->d.method = frame.method;
243 case FRAME_TYPE_DEBUGGER_INVOKE: {
247 * The normal exception handling code can't handle this frame, so just
250 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
251 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
255 g_assert_not_reached ();
260 /* mono_find_jit_info:
262 * This function is used to gather information from @ctx. It return the
263 * MonoJitInfo of the corresponding function, unwinds one stack frame and
264 * stores the resulting context into @new_ctx. It also stores a string
265 * describing the stack location into @trace (if not NULL), and modifies
266 * the @lmf if necessary. @native_offset return the IP offset from the
267 * start of the function or -1 if that info is not available.
270 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
271 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
275 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
277 MonoMethod *method = NULL;
288 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
290 if (ji == (gpointer)-1)
294 method = jinfo_get_method (ji);
296 if (managed2 || (ji && method->wrapper_type)) {
297 const char *real_ip, *start;
300 start = (const char *)ji->code_start;
302 /* ctx->ip points into native code */
303 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
305 real_ip = (const char*)ip;
307 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
308 offset = real_ip - start;
313 *native_offset = offset;
316 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
320 *trace = mono_debug_print_stack_frame (method, offset, domain);
323 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
324 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
333 * mono_find_jit_info_ext:
335 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
337 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
338 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
339 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
340 * to obtain the last managed frame.
341 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
342 * On return, it will be filled with the locations where callee saved registers are saved
343 * by the current frame. This is returned outside of StackFrameInfo because it can be
344 * quite large on some platforms.
345 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
349 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
350 MonoJitInfo *prev_ji, MonoContext *ctx,
351 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
352 mgreg_t **save_locations,
353 StackFrameInfo *frame)
356 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
358 MonoDomain *target_domain = domain;
359 MonoMethod *method = NULL;
360 gboolean async = mono_thread_info_is_async_context ();
365 /* Avoid costly table lookup during stack overflow */
366 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
369 ji = mini_jit_info_table_find (domain, ip, &target_domain);
372 target_domain = domain;
375 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
377 err = mono_arch_find_jit_info (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
381 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
383 * Remove any unused lmf.
384 * Mask out the lower bits which might be used to hold additional information.
386 *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
389 if (frame->ji && !frame->ji->async)
390 method = jinfo_get_method (frame->ji);
392 if (frame->type == FRAME_TYPE_MANAGED && method) {
393 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
394 frame->managed = TRUE;
397 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
399 * This type of frame is just a marker, the caller should unwind once more to get the
400 * last managed frame.
403 frame->method = NULL;
406 frame->native_offset = -1;
407 frame->domain = target_domain;
408 frame->async_context = async;
412 if (frame->type == FRAME_TYPE_MANAGED)
413 frame->method = method;
415 if (ji && (frame->managed || (method && method->wrapper_type))) {
416 const char *real_ip, *start;
418 start = (const char *)ji->code_start;
420 /* ctx->ip points into native code */
421 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
423 real_ip = (const char*)ip;
425 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
426 frame->native_offset = real_ip - start;
428 frame->native_offset = -1;
431 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
433 if (trace && frame->method) {
434 char *fname = mono_method_full_name (frame->method, TRUE);
435 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
444 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
446 MonoGenericJitInfo *gi;
450 if (!ji->has_generic_jit_info)
452 gi = mono_jit_info_get_generic_jit_info (ji);
458 * Search location list if available, it contains the precise location of the
459 * argument for every pc offset, even if the method was interrupted while it was in
463 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
466 for (i = 0; i < gi->nlocs; ++i) {
467 MonoDwarfLocListEntry *entry = &gi->locations [i];
469 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
471 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
473 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
477 g_assert (i < gi->nlocs);
480 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
482 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
486 method = jinfo_get_method (ji);
487 if (mono_method_get_context (method)->method_inst) {
489 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
492 /* Avoid returning a managed object */
493 MonoObject *this_obj = info;
495 return this_obj->vtable->klass;
499 static MonoGenericContext
500 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
502 MonoGenericContext context = { NULL, NULL };
503 MonoClass *class, *method_container_class;
506 g_assert (generic_info);
508 method = jinfo_get_method (ji);
509 g_assert (method->is_inflated);
510 if (mono_method_get_context (method)->method_inst) {
511 MonoMethodRuntimeGenericContext *mrgctx = generic_info;
513 class = mrgctx->class_vtable->klass;
514 context.method_inst = mrgctx->method_inst;
515 g_assert (context.method_inst);
516 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
517 MonoVTable *vtable = generic_info;
519 class = vtable->klass;
521 class = generic_info;
524 //g_assert (!method->klass->generic_container);
525 if (method->klass->generic_class)
526 method_container_class = method->klass->generic_class->container_class;
528 method_container_class = method->klass;
530 /* class might refer to a subclass of method's class */
531 while (!(class == method->klass || (class->generic_class && class->generic_class->container_class == method_container_class))) {
532 class = class->parent;
536 if (class->generic_class || class->generic_container)
537 context.class_inst = mini_class_get_context (class)->class_inst;
539 if (class->generic_class)
540 g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
542 g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
548 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
550 MonoGenericContext context;
553 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
554 return jinfo_get_method (ji);
555 context = get_generic_context_from_stack_frame (ji, generic_info);
557 method = jinfo_get_method (ji);
558 method = mono_method_get_declaring_generic_method (method);
559 method = mono_class_inflate_generic_method (method, &context);
565 * mono_exception_walk_native_trace:
566 * @ex: The exception object whose frames should be walked
567 * @func: callback to call for each stack frame
568 * @user_data: data passed to the callback
570 * This function walks the stacktrace of an exception. For
571 * each frame the callback function is called with the relevant info.
572 * The walk ends when no more stack frames are found or when the callback
573 * returns a TRUE value.
577 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
579 MonoDomain *domain = mono_domain_get ();
580 MonoArray *ta = ex->trace_ips;
586 len = mono_array_length (ta) >> 1;
587 for (i = 0; i < len; i++) {
588 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
589 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
590 MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
593 if (func (NULL, ip, 0, FALSE, user_data))
596 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
597 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
606 ves_icall_System_Exception_get_trace (MonoException *ex)
608 MonoDomain *domain = mono_domain_get ();
610 MonoArray *ta = ex->trace_ips;
615 /* Exception is not thrown yet */
618 len = mono_array_length (ta) >> 1;
619 trace_str = g_string_new ("");
620 for (i = 0; i < len; i++) {
622 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
623 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
625 ji = mono_jit_info_table_find (domain, ip);
627 /* Unmanaged frame */
628 g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
632 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
634 address = (char *)ip - (char *)ji->code_start;
635 location = mono_debug_print_stack_frame (
636 method, address, ex->object.vtable->domain);
638 g_string_append_printf (trace_str, "%s\n", location);
643 res = mono_string_new (ex->object.vtable->domain, trace_str->str);
644 g_string_free (trace_str, TRUE);
650 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
652 MonoDomain *domain = mono_domain_get ();
654 MonoArray *ta = exc->trace_ips;
655 MonoDebugSourceLocation *location;
659 /* Exception is not thrown yet */
660 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
663 len = mono_array_length (ta) >> 1;
665 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
667 for (i = skip; i < len; i++) {
669 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
670 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
671 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
674 ji = mono_jit_info_table_find (domain, ip);
676 /* Unmanaged frame */
677 mono_array_setref (res, i, sf);
681 g_assert (ji != NULL);
683 method = get_method_from_stack_frame (ji, generic_info);
684 if (jinfo_get_method (ji)->wrapper_type) {
688 s = mono_method_full_name (method, TRUE);
689 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
693 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
694 sf->method_address = (gint64) ji->code_start;
695 sf->native_offset = (char *)ip - (char *)ji->code_start;
698 * mono_debug_lookup_source_location() returns both the file / line number information
699 * and the IL offset. Note that computing the IL offset is already an expensive
700 * operation, so we shouldn't call this method twice.
702 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
704 sf->il_offset = location->il_offset;
707 if (find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
708 sf->il_offset = sp.il_offset;
713 if (need_file_info) {
714 if (location && location->source_file) {
715 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
716 sf->line = location->row;
717 sf->column = location->column;
719 sf->line = sf->column = 0;
724 mono_debug_free_source_location (location);
725 mono_array_setref (res, i, sf);
732 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
735 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
736 if (jit_tls && jit_tls->orig_ex_ctx_set)
737 start_ctx = &jit_tls->orig_ex_ctx;
739 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
742 * mono_walk_stack_with_ctx:
744 * Unwind the current thread starting at @start_ctx.
746 * If @start_ctx is null, we capture the current context.
749 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
751 MonoContext extra_ctx;
752 MonoInternalThread *thread = mono_thread_internal_current ();
753 MONO_ARCH_CONTEXT_DEF
755 if (!thread || !thread->jit_data)
759 mono_arch_flush_register_windows ();
761 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
762 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
764 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
766 start_ctx = &extra_ctx;
769 mono_walk_stack_full (func, start_ctx, mono_domain_get (), thread->jit_data, mono_get_lmf (), unwind_options, user_data);
773 * mono_walk_stack_with_state:
775 * Unwind a thread described by @state.
777 * State must be valid (state->valid == TRUE).
779 * If you are using this function to unwind another thread, make sure it is suspended.
781 * If @state is null, we capture the current context.
784 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
786 MonoThreadUnwindState extra_state;
788 g_assert (!mono_thread_info_is_async_context ());
789 if (!mono_thread_state_init_from_current (&extra_state))
791 state = &extra_state;
794 g_assert (state->valid);
796 mono_walk_stack_full (func,
798 state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
799 state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
800 state->unwind_data [MONO_UNWIND_DATA_LMF],
801 unwind_options, user_data);
805 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
807 MonoThreadUnwindState state;
808 if (!mono_thread_state_init_from_current (&state))
810 mono_walk_stack_with_state (func, &state, options, user_data);
814 * mono_walk_stack_full:
815 * @func: callback to call for each stack frame
816 * @domain: starting appdomain, can be NULL to use the current domain
817 * @unwind_options: what extra information the unwinder should gather
818 * @start_ctx: starting state of the stack walk, can be NULL.
819 * @thread: the thread whose stack to walk, can be NULL to use the current thread
820 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
821 * @user_data: data passed to the callback
823 * This function walks the stack of a thread, starting from the state
824 * represented by start_ctx. For each frame the callback
825 * function is called with the relevant info. The walk ends when no more
826 * managed stack frames are found or when the callback returns a TRUE value.
829 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
832 MonoContext ctx, new_ctx;
833 StackFrameInfo frame;
835 mgreg_t *reg_locations [MONO_MAX_IREGS];
836 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
837 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
838 gboolean async = mono_thread_info_is_async_context ();
840 g_assert (start_ctx);
843 /*The LMF will be null if the target have no managed frames.*/
844 /* g_assert (lmf); */
847 g_assert (unwind_options == MONO_UNWIND_NONE);
849 memcpy (&ctx, start_ctx, sizeof (MonoContext));
850 memset (reg_locations, 0, sizeof (reg_locations));
852 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
854 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
858 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji) {
859 MonoDebugSourceLocation *source;
861 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
863 il_offset = source->il_offset;
866 if (find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
867 il_offset = sp.il_offset;
871 mono_debug_free_source_location (source);
875 frame.il_offset = il_offset;
877 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji) {
878 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
880 frame.actual_method = frame.method;
883 if (get_reg_locations)
884 frame.reg_locations = reg_locations;
886 if (func (&frame, &ctx, user_data))
889 if (get_reg_locations) {
890 for (i = 0; i < MONO_MAX_IREGS; ++i)
891 if (new_reg_locations [i])
892 reg_locations [i] = new_reg_locations [i];
900 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
901 MonoReflectionMethod **method,
902 gint32 *iloffset, gint32 *native_offset,
903 MonoString **file, gint32 *line, gint32 *column)
905 MonoDomain *domain = mono_domain_get ();
906 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
907 MonoLMF *lmf = mono_get_lmf ();
908 MonoJitInfo *ji = NULL;
909 MonoContext ctx, new_ctx;
910 MonoDebugSourceLocation *location;
911 MonoMethod *jmethod = NULL, *actual_method;
912 StackFrameInfo frame;
915 MONO_ARCH_CONTEXT_DEF;
917 mono_arch_flush_register_windows ();
919 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
920 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
922 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
928 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
932 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE || frame.type == FRAME_TYPE_DEBUGGER_INVOKE)
936 *native_offset = frame.native_offset;
938 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
939 jmethod = jinfo_get_method (ji);
940 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
945 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
947 mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
949 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
951 *iloffset = location->il_offset;
955 if (need_file_info) {
957 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
958 *line = location->row;
959 *column = location->column;
966 mono_debug_free_source_location (location);
973 MonoSecurityFrame *frame;
974 } MonoFrameSecurityInfo;
977 callback_get_first_frame_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
979 MonoFrameSecurityInfo *si = (MonoFrameSecurityInfo*) data;
980 MonoJitInfo *ji = frame->ji;
986 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
987 method = jinfo_get_method (ji);
988 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
989 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
990 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
991 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
992 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1001 si->frame = mono_declsec_create_frame (frame->domain, ji);
1003 /* Stop - we only want the first frame (e.g. LinkDemand and InheritanceDemand) */
1008 * ves_icall_System_Security_SecurityFrame_GetSecurityFrame:
1009 * @skip: the number of stack frames to skip
1011 * This function returns a the security informations of a single stack frame
1012 * (after the skipped ones). This is required for [NonCas]LinkDemand[Choice]
1013 * and [NonCas]InheritanceDemand[Choice] as only the caller security is
1017 ves_icall_System_Security_SecurityFrame_GetSecurityFrame (gint32 skip)
1019 MonoFrameSecurityInfo si;
1024 mono_walk_stack (callback_get_first_frame_security_info, MONO_UNWIND_DEFAULT, &si);
1026 return (si.skips == 0) ? si.frame : NULL;
1035 } MonoSecurityStack;
1038 grow_array (MonoSecurityStack *stack)
1040 MonoDomain *domain = mono_domain_get ();
1041 guint32 newsize = (stack->maximum << 1);
1042 MonoArray *newstack = mono_array_new (domain, mono_defaults.runtimesecurityframe_class, newsize);
1044 for (i=0; i < stack->maximum; i++) {
1045 gpointer frame = mono_array_get (stack->stack, gpointer, i);
1046 mono_array_setref (newstack, i, frame);
1048 stack->maximum = newsize;
1049 stack->stack = newstack;
1053 callback_get_stack_frames_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
1055 MonoSecurityStack *ss = (MonoSecurityStack*) data;
1056 MonoJitInfo *ji = frame->ji;
1062 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
1063 method = jinfo_get_method (ji);
1064 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1065 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1066 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
1067 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
1068 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1072 if (ss->skips > 0) {
1077 if (ss->count == ss->maximum)
1080 mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (frame->domain, ji));
1082 /* continue down the stack */
1087 glist_to_array (GList *list, MonoClass *eclass)
1089 MonoDomain *domain = mono_domain_get ();
1096 len = g_list_length (list);
1097 res = mono_array_new (domain, eclass, len);
1099 for (i = 0; list; list = list->next, i++)
1100 mono_array_set (res, gpointer, i, list->data);
1106 * ves_icall_System_Security_SecurityFrame_GetSecurityStack:
1107 * @skip: the number of stack frames to skip
1109 * This function returns an managed array of containing the security
1110 * informations for each frame (after the skipped ones). This is used for
1111 * [NonCas]Demand[Choice] where the complete evaluation of the stack is
1115 ves_icall_System_Security_SecurityFrame_GetSecurityStack (gint32 skip)
1117 MonoSecurityStack ss;
1119 #if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
1125 ss.maximum = MONO_CAS_INITIAL_STACK_SIZE;
1126 ss.stack = mono_array_new (mono_domain_get (), mono_defaults.runtimesecurityframe_class, ss.maximum);
1127 mono_walk_stack (callback_get_stack_frames_security_info, MONO_UNWIND_DEFAULT, &ss);
1128 /* g_warning ("STACK RESULT: %d out of %d", ss.count, ss.maximum); */
1133 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1135 MonoClass *catch_class = ei->data.catch_class;
1136 MonoType *inflated_type;
1137 MonoGenericContext context;
1139 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1140 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1143 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1145 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1147 /* FIXME: we shouldn't inflate but instead put the
1148 type in the rgctx and fetch it from there. It
1149 might be a good idea to do this lazily, i.e. only
1150 when the exception is actually thrown, so as not to
1151 waste space for exception clauses which might never
1153 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1154 catch_class = mono_class_from_mono_type (inflated_type);
1155 mono_metadata_free_type (inflated_type);
1161 * mini_jit_info_table_find:
1163 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1164 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1165 * OUT_DOMAIN if it is not NULL.
1168 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1171 MonoInternalThread *t = mono_thread_internal_current ();
1177 ji = mono_jit_info_table_find (domain, addr);
1180 *out_domain = domain;
1184 /* maybe it is shared code, so we also search in the root domain */
1185 if (domain != mono_get_root_domain ()) {
1186 ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
1189 *out_domain = mono_get_root_domain ();
1197 refs = (t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL;
1198 for (; refs && *refs; refs++) {
1199 if (*refs != domain && *refs != mono_get_root_domain ()) {
1200 ji = mono_jit_info_table_find ((MonoDomain*) *refs, addr);
1203 *out_domain = (MonoDomain*) *refs;
1213 * wrap_non_exception_throws:
1215 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1216 * WrapNonExceptionThrows flag set.
1219 wrap_non_exception_throws (MonoMethod *m)
1221 MonoAssembly *ass = m->klass->image->assembly;
1222 MonoCustomAttrInfo* attrs;
1223 static MonoClass *klass;
1225 gboolean val = FALSE;
1228 if (ass->wrap_non_exception_throws_inited)
1229 return ass->wrap_non_exception_throws;
1231 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1233 attrs = mono_custom_attrs_from_assembly (ass);
1235 for (i = 0; i < attrs->num_attrs; ++i) {
1236 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1238 int len, num_named, named_type, data_type, name_len;
1241 if (!attr->ctor || attr->ctor->klass != klass)
1243 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1244 len = attr->data_size;
1245 p = (const char*)attr->data;
1246 g_assert (read16 (p) == 0x0001);
1248 num_named = read16 (p);
1257 if (named_type != 0x54)
1259 name_len = mono_metadata_decode_blob_size (p, &p);
1260 name = g_malloc (name_len + 1);
1261 memcpy (name, p, name_len);
1262 name [name_len] = 0;
1264 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1266 /* The value is a BOOLEAN */
1269 mono_custom_attrs_free (attrs);
1272 ass->wrap_non_exception_throws = val;
1273 mono_memory_barrier ();
1274 ass->wrap_non_exception_throws_inited = TRUE;
1279 #ifndef MONO_ARCH_STACK_GROWS_UP
1280 #define DOES_STACK_GROWS_UP 1
1282 #define DOES_STACK_GROWS_UP 0
1285 #define MAX_UNMANAGED_BACKTRACE 128
1287 build_native_trace (void)
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];
1293 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1298 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1300 for (i = 0; i < size; i++)
1301 mono_array_set (res, gpointer, i, native_trace [i]);
1308 #define setup_managed_stacktrace_information() do { \
1309 if (mono_ex && !initial_trace_ips) { \
1310 trace_ips = g_list_reverse (trace_ips); \
1311 MONO_OBJECT_SETREF (mono_ex, trace_ips, glist_to_array (trace_ips, mono_defaults.int_class)); \
1312 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ()); \
1313 if (has_dynamic_methods) \
1314 /* These methods could go away anytime, so compute the stack trace now */ \
1315 MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex)); \
1317 g_list_free (trace_ips); \
1321 * mono_handle_exception_internal_first_pass:
1323 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1324 * OBJ is found. Run the index of the filter clause which caught the exception into
1325 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1328 mono_handle_exception_internal_first_pass (MonoContext *ctx, gpointer obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1330 MonoDomain *domain = mono_domain_get ();
1331 MonoJitInfo *ji = NULL;
1332 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1333 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1334 MonoLMF *lmf = mono_get_lmf ();
1335 MonoArray *initial_trace_ips = NULL;
1336 GList *trace_ips = NULL;
1337 MonoException *mono_ex;
1338 gboolean stack_overflow = FALSE;
1339 MonoContext initial_ctx;
1341 int frame_count = 0;
1342 gboolean has_dynamic_methods = FALSE;
1347 g_assert (ctx != NULL);
1349 if (obj == domain->stack_overflow_ex)
1350 stack_overflow = TRUE;
1352 mono_ex = (MonoException*)obj;
1353 initial_trace_ips = mono_ex->trace_ips;
1355 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1356 mono_ex = (MonoException*)obj;
1357 initial_trace_ips = mono_ex->trace_ips;
1363 call_filter = mono_get_call_filter ();
1365 g_assert (jit_tls->end_of_stack);
1366 g_assert (jit_tls->abort_func);
1369 *out_filter_idx = -1;
1373 *out_prev_ji = NULL;
1378 MonoContext new_ctx;
1380 int clause_index_start = 0;
1381 gboolean unwind_res = TRUE;
1383 StackFrameInfo frame;
1388 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1390 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1394 g_assert (frame.type == FRAME_TYPE_MANAGED);
1399 setup_managed_stacktrace_information ();
1404 method = jinfo_get_method (ji);
1405 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1407 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1408 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1409 "The native frame called the managed method:\n%s\n",
1410 mono_method_full_name (method, TRUE));
1413 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1415 * Avoid overwriting the stack trace if the exception is
1416 * rethrown. Also avoid giant stack traces during a stack
1419 if (!initial_trace_ips && (frame_count < 1000)) {
1420 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1421 trace_ips = g_list_prepend (trace_ips,
1422 get_generic_info_from_stack_frame (ji, ctx));
1426 if (method->dynamic)
1427 has_dynamic_methods = TRUE;
1429 if (stack_overflow) {
1430 if (DOES_STACK_GROWS_UP)
1431 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1433 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1435 free_stack = 0xffffff;
1438 for (i = clause_index_start; i < ji->num_clauses; i++) {
1439 MonoJitExceptionInfo *ei = &ji->clauses [i];
1440 gboolean filtered = FALSE;
1443 * During stack overflow, wait till the unwinding frees some stack
1444 * space before running handlers/finalizers.
1446 if (free_stack <= (64 * 1024))
1449 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1451 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1454 * Have to unwrap RuntimeWrappedExceptions if the
1455 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1457 if (non_exception && !wrap_non_exception_throws (method))
1458 ex_obj = non_exception;
1462 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1463 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1464 #ifndef DISABLE_PERFCOUNTERS
1465 mono_perfcounters->exceptions_filters++;
1468 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1469 trim the stackframe since if it returns FALSE we lose information.
1471 FIXME Not 100% sure if it's a good idea even with user clauses.
1474 setup_managed_stacktrace_information ();
1476 if (ji->from_llvm) {
1477 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1478 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1480 g_assert_not_reached ();
1483 /* store the exception object in bp + ei->exvar_offset */
1484 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1487 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1488 filtered = call_filter (ctx, ei->data.filter);
1489 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1490 if (filtered && out_filter_idx)
1491 *out_filter_idx = filter_idx;
1498 setup_managed_stacktrace_information ();
1499 /* mono_debugger_agent_handle_exception () needs this */
1500 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1505 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1506 setup_managed_stacktrace_information ();
1511 /* mono_debugger_agent_handle_exception () needs this */
1512 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1521 g_assert_not_reached ();
1525 * mono_handle_exception_internal:
1526 * @ctx: saved processor state
1527 * @obj: the exception object
1528 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1531 mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gboolean resume, MonoJitInfo **out_ji)
1533 MonoDomain *domain = mono_domain_get ();
1534 MonoJitInfo *ji, *prev_ji;
1535 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1536 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1537 MonoLMF *lmf = mono_get_lmf ();
1538 MonoException *mono_ex;
1539 gboolean stack_overflow = FALSE;
1540 MonoContext initial_ctx;
1542 int frame_count = 0;
1543 gint32 filter_idx, first_filter_idx = 0;
1546 MonoObject *non_exception = NULL;
1548 g_assert (ctx != NULL);
1550 MonoException *ex = mono_get_exception_null_reference ();
1551 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1552 obj = (MonoObject *)ex;
1556 * Allocate a new exception object instead of the preconstructed ones.
1558 if (obj == domain->stack_overflow_ex) {
1560 * It is not a good idea to try and put even more pressure on the little stack available.
1561 * obj = mono_get_exception_stack_overflow ();
1563 stack_overflow = TRUE;
1565 else if (obj == domain->null_reference_ex) {
1566 obj = mono_get_exception_null_reference ();
1569 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1570 non_exception = obj;
1571 obj = mono_get_exception_runtime_wrapped (obj);
1574 mono_ex = (MonoException*)obj;
1576 if (mini_get_debug_options ()->suspend_on_exception) {
1577 mono_runtime_printf_err ("Exception thrown, suspending...");
1582 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1583 mono_ex = (MonoException*)obj;
1588 if (mono_ex && jit_tls->class_cast_from) {
1589 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1590 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1591 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1592 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1593 mono_ex->message = mono_string_new (domain, msg);
1598 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1599 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1600 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1601 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1602 mono_ex->message = mono_string_new (domain, msg);
1610 call_filter = mono_get_call_filter ();
1612 g_assert (jit_tls->end_of_stack);
1613 g_assert (jit_tls->abort_func);
1616 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1617 * end up being TRUE on any code path.
1619 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1624 MonoContext ctx_cp = *ctx;
1625 if (mono_trace_is_enabled ()) {
1626 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1627 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1628 MonoObject *message;
1629 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1631 MonoObject *exc = NULL;
1632 if (get_message == NULL) {
1634 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1636 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1638 message = mono_runtime_invoke (get_message, obj, NULL, &exc);
1642 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1644 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1646 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1647 mono_print_thread_dump_from_ctx (ctx);
1649 jit_tls->orig_ex_ctx_set = TRUE;
1650 mono_profiler_exception_thrown (obj);
1651 jit_tls->orig_ex_ctx_set = FALSE;
1653 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1656 if (mini_get_debug_options ()->break_on_exc)
1658 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1660 if (mini_get_debug_options ()->suspend_on_unhandled) {
1661 mono_runtime_printf_err ("Unhandled exception, suspending...");
1666 // FIXME: This runs managed code so it might cause another stack overflow when
1667 // we are handling a stack overflow
1668 mono_unhandled_exception (obj);
1670 gboolean unhandled = FALSE;
1673 * The exceptions caught by the mono_runtime_invoke () calls in mono_async_invoke () needs to be treated as
1674 * unhandled (#669836).
1675 * FIXME: The check below is hackish, but its hard to distinguish these runtime invoke calls from others
1678 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1680 MonoInternalThread *thread = mono_thread_internal_current ();
1681 if (jinfo_get_method (prev_ji) == thread->async_invoke_method)
1686 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1688 mono_debugger_agent_handle_exception (obj, ctx, &ctx_cp);
1698 MonoContext new_ctx;
1700 int clause_index_start = 0;
1701 gboolean unwind_res = TRUE;
1705 ji = jit_tls->resume_state.ji;
1706 new_ctx = jit_tls->resume_state.new_ctx;
1707 clause_index_start = jit_tls->resume_state.clause_index;
1708 lmf = jit_tls->resume_state.lmf;
1709 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1710 filter_idx = jit_tls->resume_state.filter_idx;
1712 StackFrameInfo frame;
1714 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1716 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1720 g_assert (frame.type == FRAME_TYPE_MANAGED);
1726 *(mono_get_lmf_addr ()) = lmf;
1728 jit_tls->abort_func (obj);
1729 g_assert_not_reached ();
1732 method = jinfo_get_method (ji);
1734 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1736 if (stack_overflow) {
1737 if (DOES_STACK_GROWS_UP)
1738 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1740 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1742 free_stack = 0xffffff;
1745 for (i = clause_index_start; i < ji->num_clauses; i++) {
1746 MonoJitExceptionInfo *ei = &ji->clauses [i];
1747 gboolean filtered = FALSE;
1750 * During stack overflow, wait till the unwinding frees some stack
1751 * space before running handlers/finalizers.
1753 if (free_stack <= (64 * 1024))
1756 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1758 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1761 * Have to unwrap RuntimeWrappedExceptions if the
1762 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1764 if (non_exception && !wrap_non_exception_throws (method))
1765 ex_obj = non_exception;
1769 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1770 if (ji->from_llvm) {
1771 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1772 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1774 g_assert_not_reached ();
1777 /* store the exception object in bp + ei->exvar_offset */
1778 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1782 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1784 * Filter clauses should only be run in the
1785 * first pass of exception handling.
1787 filtered = (filter_idx == first_filter_idx);
1791 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1792 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1794 * This guards against the situation that we abort a thread that is executing a finally clause
1795 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1796 * check for this situation here and resume interruption if we are below the guarded block.
1798 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1799 gboolean is_outside = FALSE;
1800 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1801 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1802 //FIXME make this stack direction aware
1803 if (catch_bp > prot_bp) {
1805 } else if (catch_bp == prot_bp) {
1806 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1807 * So we check if the catch handler_start is protected by the guarded handler protected region
1810 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1811 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1812 * There aren't any further finally/fault handler blocks down the stack over this exception.
1813 * This must be ensured by the code that installs the guard trampoline.
1815 g_assert (ji == mini_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1817 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1822 jit_tls->handler_block_return_address = NULL;
1823 jit_tls->handler_block = NULL;
1824 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1828 if (mono_trace_is_enabled () && mono_trace_eval (method))
1829 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1830 jit_tls->orig_ex_ctx_set = TRUE;
1831 mono_profiler_exception_clause_handler (method, ei->flags, i);
1832 jit_tls->orig_ex_ctx_set = FALSE;
1833 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1835 #ifndef DISABLE_PERFCOUNTERS
1836 mono_perfcounters->exceptions_depth += frame_count;
1838 if (obj == domain->stack_overflow_ex)
1839 jit_tls->handling_stack_ovf = FALSE;
1843 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1844 (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
1845 if (mono_trace_is_enabled () && mono_trace_eval (method))
1846 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1847 jit_tls->orig_ex_ctx_set = TRUE;
1848 mono_profiler_exception_clause_handler (method, ei->flags, i);
1849 jit_tls->orig_ex_ctx_set = FALSE;
1850 call_filter (ctx, ei->handler_start);
1852 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1853 (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
1854 if (mono_trace_is_enabled () && mono_trace_eval (method))
1855 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1856 jit_tls->orig_ex_ctx_set = TRUE;
1857 mono_profiler_exception_clause_handler (method, ei->flags, i);
1858 jit_tls->orig_ex_ctx_set = FALSE;
1859 #ifndef DISABLE_PERFCOUNTERS
1860 mono_perfcounters->exceptions_finallys++;
1863 if (ji->from_llvm) {
1865 * LLVM compiled finally handlers follow the design
1866 * of the c++ ehabi, i.e. they call a resume function
1867 * at the end instead of returning to the caller.
1868 * So save the exception handling state,
1869 * mono_resume_unwind () will call us again to continue
1872 jit_tls->resume_state.ex_obj = obj;
1873 jit_tls->resume_state.ji = ji;
1874 jit_tls->resume_state.clause_index = i + 1;
1875 jit_tls->resume_state.ctx = *ctx;
1876 jit_tls->resume_state.new_ctx = new_ctx;
1877 jit_tls->resume_state.lmf = lmf;
1878 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1879 jit_tls->resume_state.filter_idx = filter_idx;
1880 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1883 call_filter (ctx, ei->handler_start);
1889 jit_tls->orig_ex_ctx_set = TRUE;
1890 mono_profiler_exception_method_leave (method);
1891 jit_tls->orig_ex_ctx_set = FALSE;
1896 g_assert_not_reached ();
1900 * mono_debugger_run_finally:
1901 * @start_ctx: saved processor state
1903 * This method is called by the Mono Debugger to call all `finally' clauses of the
1904 * current stack frame. It's used when the user issues a `return' command to make
1905 * the current stack frame return. After returning from this method, the debugger
1906 * unwinds the stack one frame and gives control back to the user.
1908 * NOTE: This method is only used when running inside the Mono Debugger.
1911 mono_debugger_run_finally (MonoContext *start_ctx)
1913 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1914 MonoDomain *domain = mono_domain_get ();
1915 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1916 MonoLMF *lmf = mono_get_lmf ();
1917 MonoContext ctx, new_ctx;
1918 MonoJitInfo *ji, rji;
1923 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1924 if (!ji || ji == (gpointer)-1)
1928 call_filter = mono_get_call_filter ();
1930 for (i = 0; i < ji->num_clauses; i++) {
1931 MonoJitExceptionInfo *ei = &ji->clauses [i];
1933 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1934 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1935 call_filter (&ctx, ei->handler_start);
1941 * mono_handle_exception:
1942 * @ctx: saved processor state
1943 * @obj: the exception object
1946 mono_handle_exception (MonoContext *ctx, gpointer obj)
1948 #ifndef DISABLE_PERFCOUNTERS
1949 mono_perfcounters->exceptions_thrown++;
1952 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1955 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1957 #ifndef MONO_ARCH_USE_SIGACTION
1958 #error "Can't use sigaltstack without sigaction"
1961 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
1964 mono_setup_altstack (MonoJitTlsData *tls)
1968 guint8 *staddr = NULL;
1970 if (mono_running_on_valgrind ())
1973 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1977 tls->end_of_stack = staddr + stsize;
1978 tls->stack_size = stsize;
1980 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
1982 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
1983 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
1985 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
1987 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
1988 /* mprotect can fail for the main thread stack */
1989 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);
1990 g_assert (gaddr == tls->stack_ovf_guard_base);
1991 tls->stack_ovf_valloced = TRUE;
1994 /* Setup an alternate signal stack */
1995 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
1996 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
1998 g_assert (tls->signal_stack);
2000 sa.ss_sp = tls->signal_stack;
2001 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2003 g_assert (sigaltstack (&sa, NULL) == 0);
2005 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);
2009 mono_free_altstack (MonoJitTlsData *tls)
2014 sa.ss_sp = tls->signal_stack;
2015 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2016 sa.ss_flags = SS_DISABLE;
2017 err = sigaltstack (&sa, NULL);
2018 g_assert (err == 0);
2020 if (tls->signal_stack)
2021 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
2022 if (tls->stack_ovf_valloced)
2023 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
2025 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2028 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2031 mono_setup_altstack (MonoJitTlsData *tls)
2036 mono_free_altstack (MonoJitTlsData *tls)
2040 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2043 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2045 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2046 /* we need to leave some room for throwing the exception */
2047 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2048 unprotect_size -= mono_pagesize ();
2049 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2050 * is sufficient stack
2052 //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);
2054 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2055 return unprotect_size == jit_tls->stack_ovf_guard_size;
2058 static G_GNUC_UNUSED void
2059 try_more_restore (void)
2061 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2062 if (try_restore_stack_protection (jit_tls, 500))
2063 jit_tls->restore_stack_prot = NULL;
2066 static G_GNUC_UNUSED void
2067 restore_stack_protection (void)
2069 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2070 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2071 /* if we can't restore the stack protection, keep a callback installed so
2072 * we'll try to restore as much stack as we can at each return from unmanaged
2075 if (try_restore_stack_protection (jit_tls, 4096))
2076 jit_tls->restore_stack_prot = NULL;
2078 jit_tls->restore_stack_prot = try_more_restore_tramp;
2079 /* here we also throw a stack overflow exception */
2080 ex->trace_ips = NULL;
2081 ex->stack_trace = NULL;
2082 mono_raise_exception (ex);
2086 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2088 void (*func)(void) = (gpointer)tramp_data;
2094 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2096 /* we got a stack overflow in the soft-guard pages
2097 * There are two cases:
2098 * 1) managed code caused the overflow: we unprotect the soft-guard page
2099 * and let the arch-specific code trigger the exception handling mechanism
2100 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2101 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2102 * and hope we can continue with those enabled, at least until the hard-guard page
2103 * is hit. The alternative to continuing here is to just print a message and abort.
2104 * We may add in the future the code to protect the pages again in the codepath
2105 * when we return from unmanaged to managed code.
2107 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2108 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2109 /* we unprotect the minimum amount we can */
2111 gboolean handled = FALSE;
2113 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2114 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2115 guard_size -= mono_pagesize ();
2117 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2118 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2119 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);
2120 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2122 mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
2127 /* We print a message: after this even managed stack overflows
2128 * may crash the runtime
2130 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2131 if (!jit_tls->handling_stack_ovf) {
2132 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2133 jit_tls->handling_stack_ovf = 1;
2135 /*fprintf (stderr, "Already handling stack overflow\n");*/
2144 MonoMethod *omethod;
2146 } PrintOverflowUserData;
2148 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2150 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2152 MonoMethod *method = NULL;
2153 PrintOverflowUserData *user_data = data;
2157 method = jinfo_get_method (frame->ji);
2160 if (user_data->count == 0) {
2161 /* The first frame is in its prolog, so a line number cannot be computed */
2162 user_data->count ++;
2166 /* If this is a one method overflow, skip the other instances */
2167 if (method == user_data->omethod)
2170 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2171 mono_runtime_printf_err (" %s", location);
2174 if (user_data->count == 1) {
2175 mono_runtime_printf_err (" <...>");
2176 user_data->omethod = method;
2178 user_data->omethod = NULL;
2181 user_data->count ++;
2183 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2190 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2192 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2193 PrintOverflowUserData ud;
2197 /* we don't do much now, but we can warn the user with a useful message */
2198 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2200 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2201 mono_sigctx_to_monoctx (ctx, &mctx);
2203 mono_runtime_printf_err ("Stacktrace:");
2205 memset (&ud, 0, sizeof (ud));
2207 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2209 if (ji && jinfo_get_method (ji))
2210 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2212 mono_runtime_printf_err ("At <unmanaged>.");
2219 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2221 MonoMethod *method = NULL;
2224 method = jinfo_get_method (frame->ji);
2227 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2228 mono_runtime_printf_err (" %s", location);
2231 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2236 static G_GNUC_UNUSED gboolean
2237 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2239 GString *p = (GString*)data;
2240 MonoMethod *method = NULL;
2243 method = jinfo_get_method (frame->ji);
2245 if (method && frame->domain) {
2246 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
2247 g_string_append_printf (p, " %s\n", location);
2250 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2255 #ifndef MONO_CROSS_COMPILE
2257 static gboolean handling_sigsegv = FALSE;
2260 * mono_handle_native_sigsegv:
2262 * Handle a SIGSEGV received while in native code by printing diagnostic
2263 * information and aborting.
2266 mono_handle_native_sigsegv (int signal, void *ctx)
2268 #ifdef MONO_ARCH_USE_SIGACTION
2269 struct sigaction sa;
2271 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2272 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2274 if (handling_sigsegv)
2277 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2278 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2289 /* To prevent infinite loops when the stack walk causes a crash */
2290 handling_sigsegv = TRUE;
2292 /* !jit_tls means the thread was not registered with the runtime */
2293 if (jit_tls && mono_thread_internal_current ()) {
2294 mono_runtime_printf_err ("Stacktrace:\n");
2296 mono_walk_stack (print_stack_frame_to_stderr, TRUE, NULL);
2299 #ifdef HAVE_BACKTRACE_SYMBOLS
2305 mono_runtime_printf_err ("\nNative stacktrace:\n");
2307 size = backtrace (array, 256);
2308 names = backtrace_symbols (array, size);
2309 for (i =0; i < size; ++i) {
2310 mono_runtime_printf_err ("\t%s", names [i]);
2314 /* Try to get more meaningful information using gdb */
2316 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2317 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2318 /* From g_spawn_command_line_sync () in eglib */
2321 pid_t crashed_pid = getpid ();
2325 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2326 * it will deadlock. Call the syscall directly instead.
2328 pid = mono_runtime_syscall_fork ();
2331 dup2 (STDERR_FILENO, STDOUT_FILENO);
2333 mono_gdb_render_native_backtraces (crashed_pid);
2337 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2338 waitpid (pid, &status, 0);
2345 * A SIGSEGV indicates something went very wrong so we can no longer depend
2346 * on anything working. So try to print out lots of diagnostics, starting
2347 * with ones which have a greater chance of working.
2349 mono_runtime_printf_err (
2351 "=================================================================\n"
2352 "Got a %s while executing native code. This usually indicates\n"
2353 "a fatal error in the mono runtime or one of the native libraries \n"
2354 "used by your application.\n"
2355 "=================================================================\n",
2359 #ifdef MONO_ARCH_USE_SIGACTION
2361 /* Remove our SIGABRT handler */
2362 sa.sa_handler = SIG_DFL;
2363 sigemptyset (&sa.sa_mask);
2366 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2370 if (!mono_do_crash_chaining) {
2371 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2372 #if defined (PLATFORM_ANDROID)
2383 mono_handle_native_sigsegv (int signal, void *ctx)
2385 g_assert_not_reached ();
2388 #endif /* !MONO_CROSS_COMPILE */
2391 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2393 MonoInternalThread *thread = mono_thread_internal_current ();
2394 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2402 GError *error = NULL;
2407 text = g_string_new (0);
2409 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2411 g_string_append_printf (text, "\n\"%s\"", name);
2414 else if (thread->threadpool_thread)
2415 g_string_append (text, "\n\"<threadpool thread>\"");
2417 g_string_append (text, "\n\"<unnamed thread>\"");
2420 wapi_desc = wapi_current_thread_desc ();
2421 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2425 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2427 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2429 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2431 mono_sigctx_to_monoctx (sigctx, &ctx);
2433 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2435 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2438 mono_runtime_printf ("%s", text->str);
2440 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2441 OutputDebugStringA(text->str);
2444 g_string_free (text, TRUE);
2445 mono_runtime_stdout_fflush ();
2449 * mono_print_thread_dump:
2451 * Print information about the current thread to stdout.
2452 * SIGCTX can be NULL, allowing this to be called from gdb.
2455 mono_print_thread_dump (void *sigctx)
2457 mono_print_thread_dump_internal (sigctx, NULL);
2461 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2463 mono_print_thread_dump_internal (NULL, ctx);
2467 * mono_resume_unwind:
2469 * This is called by a trampoline from LLVM compiled finally clauses to continue
2473 mono_resume_unwind (MonoContext *ctx)
2475 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2476 MonoContext new_ctx;
2478 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2479 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2482 mono_handle_exception_internal (&new_ctx, jit_tls->resume_state.ex_obj, TRUE, NULL);
2484 mono_restore_context (&new_ctx);
2487 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2492 MonoJitExceptionInfo *ei;
2493 } FindHandlerBlockData;
2496 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2500 FindHandlerBlockData *pdata = data;
2501 MonoJitInfo *ji = frame->ji;
2506 ip = MONO_CONTEXT_GET_IP (ctx);
2508 for (i = 0; i < ji->num_clauses; ++i) {
2509 MonoJitExceptionInfo *ei = ji->clauses + i;
2510 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2512 /*If ip points to the first instruction it means the handler block didn't start
2513 so we can leave its execution to the EH machinery*/
2514 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2526 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2529 MonoJitExceptionInfo *clause = NULL;
2532 ip = MONO_CONTEXT_GET_IP (ctx);
2534 for (i = 0; i < ji->num_clauses; ++i) {
2535 clause = &ji->clauses [i];
2536 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2538 if (clause->handler_start < ip && clause->data.handler_end > ip)
2542 /*no matching finally */
2543 if (i == ji->num_clauses)
2546 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2547 if (ip == clause->handler_start)
2550 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2554 * Finds the bottom handler block running and install a block guard if needed.
2555 * FIXME add full-aot support.
2558 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2560 FindHandlerBlockData data = { 0 };
2561 MonoJitTlsData *jit_tls = ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2568 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2569 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2571 if (!jit_tls || jit_tls->handler_block_return_address)
2574 /* Do an async safe stack walk */
2575 mono_thread_info_set_is_async_context (TRUE);
2576 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2577 mono_thread_info_set_is_async_context (FALSE);
2582 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2584 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2585 if (resume_ip == NULL)
2588 jit_tls->handler_block_return_address = resume_ip;
2589 jit_tls->handler_block = data.ei;
2596 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2604 mono_set_cast_details (MonoClass *from, MonoClass *to)
2606 MonoJitTlsData *jit_tls = NULL;
2608 if (mini_get_debug_options ()->better_cast_details) {
2609 jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2610 jit_tls->class_cast_from = from;
2611 jit_tls->class_cast_to = to;
2616 /*returns false if the thread is not attached*/
2618 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2620 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2621 MonoInternalThread *thread = mono_thread_internal_current ();
2622 if (!thread || !thread->jit_data) {
2628 mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
2630 #if MONO_ARCH_HAS_MONO_CONTEXT && !defined(MONO_CROSS_COMPILE)
2631 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2633 g_error ("Use a null sigctx requires a working mono-context");
2636 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2637 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2638 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2642 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2648 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2650 MonoInternalThread *thread = mono_thread_internal_current ();
2651 if (!thread || !thread->jit_data) {
2657 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2658 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2659 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2664 /*returns false if the thread is not attached*/
2666 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2668 MonoInternalThread *thread = mono_thread_internal_current ();
2669 MONO_ARCH_CONTEXT_DEF
2671 mono_arch_flush_register_windows ();
2673 if (!thread || !thread->jit_data) {
2677 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2678 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2680 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2683 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2684 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2685 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2691 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2693 mono_handle_exception (ctx, exc);
2694 mono_restore_context (ctx);
2697 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2699 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2701 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2702 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2703 jit_tls->ex_ctx = *ctx;
2705 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2707 g_error ("This target doesn't support mono_arch_setup_async_callback");
2712 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2714 unhandled_exception_hook = func;
2715 unhandled_exception_hook_data = user_data;
2719 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2721 if (unhandled_exception_hook) {
2722 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2724 MonoObject *other = NULL;
2725 MonoString *str = mono_object_to_string (exc, &other);
2729 msg = mono_string_to_utf8 (str);
2731 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2732 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2734 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2735 original_backtrace, nested_backtrace);
2737 g_free (original_backtrace);
2738 g_free (nested_backtrace);
2740 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2742 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2744 #if defined(__APPLE__) && defined(__arm__)
2745 g_assertion_message ("Terminating runtime due to unhandled exception");
2747 exit (mono_environment_exitcode_get ());
2751 g_assert_not_reached ();
2755 * mono_restore_context:
2757 * Call the architecture specific restore context function.
2760 mono_restore_context (MonoContext *ctx)
2762 static void (*restore_context) (MonoContext *);
2764 if (!restore_context)
2765 restore_context = mono_get_restore_context ();
2766 restore_context (ctx);
2767 g_assert_not_reached ();
2771 * mono_jinfo_get_unwind_info:
2773 * Return the unwind info for JI.
2776 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2779 return mono_aot_get_unwind_info (ji, unwind_info_len);
2781 return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
2785 mono_jinfo_get_epilog_size (MonoJitInfo *ji)
2787 MonoArchEHJitInfo *info;
2789 info = mono_jit_info_get_arch_eh_info (ji);
2792 return info->epilog_size;