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);
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 /* Convert between the new and the old APIs */
222 switch (frame.type) {
223 case FRAME_TYPE_MANAGED:
227 case FRAME_TYPE_MANAGED_TO_NATIVE:
231 memset (res, 0, sizeof (MonoJitInfo));
232 res->d.method = frame.method;
235 case FRAME_TYPE_DEBUGGER_INVOKE: {
239 * The normal exception handling code can't handle this frame, so just
242 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
243 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
247 g_assert_not_reached ();
252 /* mono_find_jit_info:
254 * This function is used to gather information from @ctx. It return the
255 * MonoJitInfo of the corresponding function, unwinds one stack frame and
256 * stores the resulting context into @new_ctx. It also stores a string
257 * describing the stack location into @trace (if not NULL), and modifies
258 * the @lmf if necessary. @native_offset return the IP offset from the
259 * start of the function or -1 if that info is not available.
262 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
263 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
267 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
269 MonoMethod *method = NULL;
280 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
282 if (ji == (gpointer)-1)
286 method = jinfo_get_method (ji);
288 if (managed2 || (ji && method->wrapper_type)) {
289 const char *real_ip, *start;
292 start = (const char *)ji->code_start;
294 /* ctx->ip points into native code */
295 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
297 real_ip = (const char*)ip;
299 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
300 offset = real_ip - start;
305 *native_offset = offset;
308 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
312 *trace = mono_debug_print_stack_frame (method, offset, domain);
315 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
316 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
325 * mono_find_jit_info_ext:
327 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
329 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
330 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
331 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
332 * to obtain the last managed frame.
333 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
334 * On return, it will be filled with the locations where callee saved registers are saved
335 * by the current frame. This is returned outside of StackFrameInfo because it can be
336 * quite large on some platforms.
337 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
341 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
342 MonoJitInfo *prev_ji, MonoContext *ctx,
343 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
344 mgreg_t **save_locations,
345 StackFrameInfo *frame)
348 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
350 MonoDomain *target_domain = domain;
351 MonoMethod *method = NULL;
352 gboolean async = mono_thread_info_is_async_context ();
357 /* Avoid costly table lookup during stack overflow */
358 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
361 ji = mini_jit_info_table_find (domain, ip, &target_domain);
364 target_domain = domain;
367 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
369 err = mono_arch_find_jit_info (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
373 if (frame->ji && !frame->ji->async)
374 method = jinfo_get_method (frame->ji);
376 if (frame->type == FRAME_TYPE_MANAGED && method) {
377 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
378 frame->managed = TRUE;
381 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
383 * This type of frame is just a marker, the caller should unwind once more to get the
384 * last managed frame.
387 frame->method = NULL;
390 frame->native_offset = -1;
391 frame->domain = target_domain;
392 frame->async_context = async;
396 if (frame->type == FRAME_TYPE_MANAGED)
397 frame->method = method;
399 if (ji && (frame->managed || (method && method->wrapper_type))) {
400 const char *real_ip, *start;
402 start = (const char *)ji->code_start;
404 /* ctx->ip points into native code */
405 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
407 real_ip = (const char*)ip;
409 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
410 frame->native_offset = real_ip - start;
412 frame->native_offset = -1;
415 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
417 if (trace && frame->method) {
418 char *fname = mono_method_full_name (frame->method, TRUE);
419 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
428 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
430 MonoGenericJitInfo *gi;
434 if (!ji->has_generic_jit_info)
436 gi = mono_jit_info_get_generic_jit_info (ji);
442 * Search location list if available, it contains the precise location of the
443 * argument for every pc offset, even if the method was interrupted while it was in
447 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
450 for (i = 0; i < gi->nlocs; ++i) {
451 MonoDwarfLocListEntry *entry = &gi->locations [i];
453 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
455 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
457 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
461 g_assert (i < gi->nlocs);
464 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
466 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
470 method = jinfo_get_method (ji);
471 if (mono_method_get_context (method)->method_inst) {
473 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
476 /* Avoid returning a managed object */
477 MonoObject *this_obj = info;
479 return this_obj->vtable->klass;
483 static MonoGenericContext
484 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
486 MonoGenericContext context = { NULL, NULL };
487 MonoClass *class, *method_container_class;
490 g_assert (generic_info);
492 method = jinfo_get_method (ji);
493 g_assert (method->is_inflated);
494 if (mono_method_get_context (method)->method_inst) {
495 MonoMethodRuntimeGenericContext *mrgctx = generic_info;
497 class = mrgctx->class_vtable->klass;
498 context.method_inst = mrgctx->method_inst;
499 g_assert (context.method_inst);
500 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
501 MonoVTable *vtable = generic_info;
503 class = vtable->klass;
505 class = generic_info;
508 //g_assert (!method->klass->generic_container);
509 if (method->klass->generic_class)
510 method_container_class = method->klass->generic_class->container_class;
512 method_container_class = method->klass;
514 /* class might refer to a subclass of method's class */
515 while (!(class == method->klass || (class->generic_class && class->generic_class->container_class == method_container_class))) {
516 class = class->parent;
520 if (class->generic_class || class->generic_container)
521 context.class_inst = mini_class_get_context (class)->class_inst;
523 if (class->generic_class)
524 g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
526 g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
532 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
534 MonoGenericContext context;
537 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
538 return jinfo_get_method (ji);
539 context = get_generic_context_from_stack_frame (ji, generic_info);
541 method = jinfo_get_method (ji);
542 method = mono_method_get_declaring_generic_method (method);
543 method = mono_class_inflate_generic_method (method, &context);
549 * mono_exception_walk_native_trace:
550 * @ex: The exception object whose frames should be walked
551 * @func: callback to call for each stack frame
552 * @user_data: data passed to the callback
554 * This function walks the stacktrace of an exception. For
555 * each frame the callback function is called with the relevant info.
556 * The walk ends when no more stack frames are found or when the callback
557 * returns a TRUE value.
561 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
563 MonoDomain *domain = mono_domain_get ();
564 MonoArray *ta = ex->trace_ips;
570 len = mono_array_length (ta) >> 1;
571 for (i = 0; i < len; i++) {
572 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
573 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
574 MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
577 if (func (NULL, ip, 0, FALSE, user_data))
580 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
581 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
590 ves_icall_System_Exception_get_trace (MonoException *ex)
592 MonoDomain *domain = mono_domain_get ();
594 MonoArray *ta = ex->trace_ips;
599 /* Exception is not thrown yet */
602 len = mono_array_length (ta) >> 1;
603 trace_str = g_string_new ("");
604 for (i = 0; i < len; i++) {
606 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
607 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
609 ji = mono_jit_info_table_find (domain, ip);
611 /* Unmanaged frame */
612 g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
616 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
618 address = (char *)ip - (char *)ji->code_start;
619 location = mono_debug_print_stack_frame (
620 method, address, ex->object.vtable->domain);
622 g_string_append_printf (trace_str, "%s\n", location);
627 res = mono_string_new (ex->object.vtable->domain, trace_str->str);
628 g_string_free (trace_str, TRUE);
634 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
636 MonoDomain *domain = mono_domain_get ();
638 MonoArray *ta = exc->trace_ips;
639 MonoDebugSourceLocation *location;
643 /* Exception is not thrown yet */
644 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
647 len = mono_array_length (ta) >> 1;
649 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
651 for (i = skip; i < len; i++) {
653 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
654 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
655 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
658 ji = mono_jit_info_table_find (domain, ip);
660 /* Unmanaged frame */
661 mono_array_setref (res, i, sf);
665 g_assert (ji != NULL);
667 method = get_method_from_stack_frame (ji, generic_info);
668 if (jinfo_get_method (ji)->wrapper_type) {
672 s = mono_method_full_name (method, TRUE);
673 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
677 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
678 sf->native_offset = (char *)ip - (char *)ji->code_start;
681 * mono_debug_lookup_source_location() returns both the file / line number information
682 * and the IL offset. Note that computing the IL offset is already an expensive
683 * operation, so we shouldn't call this method twice.
685 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
687 sf->il_offset = location->il_offset;
691 if (need_file_info) {
692 if (location && location->source_file) {
693 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
694 sf->line = location->row;
695 sf->column = location->column;
697 sf->line = sf->column = 0;
702 mono_debug_free_source_location (location);
703 mono_array_setref (res, i, sf);
710 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
713 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
714 if (jit_tls && jit_tls->orig_ex_ctx_set)
715 start_ctx = &jit_tls->orig_ex_ctx;
717 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
720 * mono_walk_stack_with_ctx:
722 * Unwind the current thread starting at @start_ctx.
724 * If @start_ctx is null, we capture the current context.
727 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
729 MonoContext extra_ctx;
730 MonoInternalThread *thread = mono_thread_internal_current ();
731 MONO_ARCH_CONTEXT_DEF
733 if (!thread || !thread->jit_data)
737 mono_arch_flush_register_windows ();
739 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
740 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
742 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
744 start_ctx = &extra_ctx;
747 mono_walk_stack_full (func, start_ctx, mono_domain_get (), thread->jit_data, mono_get_lmf (), unwind_options, user_data);
751 * mono_walk_stack_with_state:
753 * Unwind a thread described by @state.
755 * State must be valid (state->valid == TRUE).
757 * If you are using this function to unwind another thread, make sure it is suspended.
759 * If @state is null, we capture the current context.
762 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
764 MonoThreadUnwindState extra_state;
766 g_assert (!mono_thread_info_is_async_context ());
767 if (!mono_thread_state_init_from_current (&extra_state))
769 state = &extra_state;
772 g_assert (state->valid);
774 mono_walk_stack_full (func,
776 state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
777 state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
778 state->unwind_data [MONO_UNWIND_DATA_LMF],
779 unwind_options, user_data);
783 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
785 MonoThreadUnwindState state;
786 if (!mono_thread_state_init_from_current (&state))
788 mono_walk_stack_with_state (func, &state, options, user_data);
792 * mono_walk_stack_full:
793 * @func: callback to call for each stack frame
794 * @domain: starting appdomain, can be NULL to use the current domain
795 * @unwind_options: what extra information the unwinder should gather
796 * @start_ctx: starting state of the stack walk, can be NULL.
797 * @thread: the thread whose stack to walk, can be NULL to use the current thread
798 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
799 * @user_data: data passed to the callback
801 * This function walks the stack of a thread, starting from the state
802 * represented by start_ctx. For each frame the callback
803 * function is called with the relevant info. The walk ends when no more
804 * managed stack frames are found or when the callback returns a TRUE value.
807 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
810 MonoContext ctx, new_ctx;
811 StackFrameInfo frame;
813 mgreg_t *reg_locations [MONO_MAX_IREGS];
814 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
815 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
816 gboolean async = mono_thread_info_is_async_context ();
818 g_assert (start_ctx);
821 /*The LMF will be null if the target have no managed frames.*/
822 /* g_assert (lmf); */
825 g_assert (unwind_options == MONO_UNWIND_NONE);
827 memcpy (&ctx, start_ctx, sizeof (MonoContext));
828 memset (reg_locations, 0, sizeof (reg_locations));
830 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
832 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
836 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji) {
837 MonoDebugSourceLocation *source;
839 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
840 il_offset = source ? source->il_offset : -1;
841 mono_debug_free_source_location (source);
845 frame.il_offset = il_offset;
847 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji) {
848 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
850 frame.actual_method = frame.method;
853 if (get_reg_locations)
854 frame.reg_locations = reg_locations;
856 if (func (&frame, &ctx, user_data))
859 if (get_reg_locations) {
860 for (i = 0; i < MONO_MAX_IREGS; ++i)
861 if (new_reg_locations [i])
862 reg_locations [i] = new_reg_locations [i];
870 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
871 MonoReflectionMethod **method,
872 gint32 *iloffset, gint32 *native_offset,
873 MonoString **file, gint32 *line, gint32 *column)
875 MonoDomain *domain = mono_domain_get ();
876 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
877 MonoLMF *lmf = mono_get_lmf ();
878 MonoJitInfo *ji = NULL;
879 MonoContext ctx, new_ctx;
880 MonoDebugSourceLocation *location;
881 MonoMethod *jmethod = NULL, *actual_method;
882 StackFrameInfo frame;
885 MONO_ARCH_CONTEXT_DEF;
887 mono_arch_flush_register_windows ();
889 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
890 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
892 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
898 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
902 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE || frame.type == FRAME_TYPE_DEBUGGER_INVOKE)
906 *native_offset = frame.native_offset;
908 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
909 jmethod = jinfo_get_method (ji);
910 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
915 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
917 mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
919 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
921 *iloffset = location->il_offset;
925 if (need_file_info) {
927 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
928 *line = location->row;
929 *column = location->column;
936 mono_debug_free_source_location (location);
943 MonoSecurityFrame *frame;
944 } MonoFrameSecurityInfo;
947 callback_get_first_frame_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
949 MonoFrameSecurityInfo *si = (MonoFrameSecurityInfo*) data;
950 MonoJitInfo *ji = frame->ji;
956 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
957 method = jinfo_get_method (ji);
958 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
959 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
960 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
961 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
962 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
971 si->frame = mono_declsec_create_frame (frame->domain, ji);
973 /* Stop - we only want the first frame (e.g. LinkDemand and InheritanceDemand) */
978 * ves_icall_System_Security_SecurityFrame_GetSecurityFrame:
979 * @skip: the number of stack frames to skip
981 * This function returns a the security informations of a single stack frame
982 * (after the skipped ones). This is required for [NonCas]LinkDemand[Choice]
983 * and [NonCas]InheritanceDemand[Choice] as only the caller security is
987 ves_icall_System_Security_SecurityFrame_GetSecurityFrame (gint32 skip)
989 MonoFrameSecurityInfo si;
994 mono_walk_stack (callback_get_first_frame_security_info, MONO_UNWIND_DEFAULT, &si);
996 return (si.skips == 0) ? si.frame : NULL;
1005 } MonoSecurityStack;
1008 grow_array (MonoSecurityStack *stack)
1010 MonoDomain *domain = mono_domain_get ();
1011 guint32 newsize = (stack->maximum << 1);
1012 MonoArray *newstack = mono_array_new (domain, mono_defaults.runtimesecurityframe_class, newsize);
1014 for (i=0; i < stack->maximum; i++) {
1015 gpointer frame = mono_array_get (stack->stack, gpointer, i);
1016 mono_array_setref (newstack, i, frame);
1018 stack->maximum = newsize;
1019 stack->stack = newstack;
1023 callback_get_stack_frames_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
1025 MonoSecurityStack *ss = (MonoSecurityStack*) data;
1026 MonoJitInfo *ji = frame->ji;
1032 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
1033 method = jinfo_get_method (ji);
1034 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1035 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1036 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
1037 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
1038 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1042 if (ss->skips > 0) {
1047 if (ss->count == ss->maximum)
1050 mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (frame->domain, ji));
1052 /* continue down the stack */
1057 glist_to_array (GList *list, MonoClass *eclass)
1059 MonoDomain *domain = mono_domain_get ();
1066 len = g_list_length (list);
1067 res = mono_array_new (domain, eclass, len);
1069 for (i = 0; list; list = list->next, i++)
1070 mono_array_set (res, gpointer, i, list->data);
1076 * ves_icall_System_Security_SecurityFrame_GetSecurityStack:
1077 * @skip: the number of stack frames to skip
1079 * This function returns an managed array of containing the security
1080 * informations for each frame (after the skipped ones). This is used for
1081 * [NonCas]Demand[Choice] where the complete evaluation of the stack is
1085 ves_icall_System_Security_SecurityFrame_GetSecurityStack (gint32 skip)
1087 MonoSecurityStack ss;
1089 #if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
1095 ss.maximum = MONO_CAS_INITIAL_STACK_SIZE;
1096 ss.stack = mono_array_new (mono_domain_get (), mono_defaults.runtimesecurityframe_class, ss.maximum);
1097 mono_walk_stack (callback_get_stack_frames_security_info, MONO_UNWIND_DEFAULT, &ss);
1098 /* g_warning ("STACK RESULT: %d out of %d", ss.count, ss.maximum); */
1103 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1105 MonoClass *catch_class = ei->data.catch_class;
1106 MonoType *inflated_type;
1107 MonoGenericContext context;
1109 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1110 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1113 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1115 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1117 /* FIXME: we shouldn't inflate but instead put the
1118 type in the rgctx and fetch it from there. It
1119 might be a good idea to do this lazily, i.e. only
1120 when the exception is actually thrown, so as not to
1121 waste space for exception clauses which might never
1123 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1124 catch_class = mono_class_from_mono_type (inflated_type);
1125 mono_metadata_free_type (inflated_type);
1131 * mini_jit_info_table_find:
1133 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1134 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1135 * OUT_DOMAIN if it is not NULL.
1138 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1141 MonoInternalThread *t = mono_thread_internal_current ();
1147 ji = mono_jit_info_table_find (domain, addr);
1150 *out_domain = domain;
1154 /* maybe it is shared code, so we also search in the root domain */
1155 if (domain != mono_get_root_domain ()) {
1156 ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
1159 *out_domain = mono_get_root_domain ();
1167 refs = (t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL;
1168 for (; refs && *refs; refs++) {
1169 if (*refs != domain && *refs != mono_get_root_domain ()) {
1170 ji = mono_jit_info_table_find ((MonoDomain*) *refs, addr);
1173 *out_domain = (MonoDomain*) *refs;
1183 * wrap_non_exception_throws:
1185 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1186 * WrapNonExceptionThrows flag set.
1189 wrap_non_exception_throws (MonoMethod *m)
1191 MonoAssembly *ass = m->klass->image->assembly;
1192 MonoCustomAttrInfo* attrs;
1193 static MonoClass *klass;
1195 gboolean val = FALSE;
1198 if (ass->wrap_non_exception_throws_inited)
1199 return ass->wrap_non_exception_throws;
1201 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1203 attrs = mono_custom_attrs_from_assembly (ass);
1205 for (i = 0; i < attrs->num_attrs; ++i) {
1206 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1208 int len, num_named, named_type, data_type, name_len;
1211 if (!attr->ctor || attr->ctor->klass != klass)
1213 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1214 len = attr->data_size;
1215 p = (const char*)attr->data;
1216 g_assert (read16 (p) == 0x0001);
1218 num_named = read16 (p);
1227 if (named_type != 0x54)
1229 name_len = mono_metadata_decode_blob_size (p, &p);
1230 name = g_malloc (name_len + 1);
1231 memcpy (name, p, name_len);
1232 name [name_len] = 0;
1234 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1236 /* The value is a BOOLEAN */
1239 mono_custom_attrs_free (attrs);
1242 ass->wrap_non_exception_throws = val;
1243 mono_memory_barrier ();
1244 ass->wrap_non_exception_throws_inited = TRUE;
1249 #ifndef MONO_ARCH_STACK_GROWS_UP
1250 #define DOES_STACK_GROWS_UP 1
1252 #define DOES_STACK_GROWS_UP 0
1255 #define MAX_UNMANAGED_BACKTRACE 128
1257 build_native_trace (void)
1259 /* This puppy only makes sense on mobile, IOW, ARM. */
1260 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1262 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1263 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1268 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1270 for (i = 0; i < size; i++)
1271 mono_array_set (res, gpointer, i, native_trace [i]);
1278 #define setup_managed_stacktrace_information() do { \
1279 if (mono_ex && !initial_trace_ips) { \
1280 trace_ips = g_list_reverse (trace_ips); \
1281 MONO_OBJECT_SETREF (mono_ex, trace_ips, glist_to_array (trace_ips, mono_defaults.int_class)); \
1282 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ()); \
1283 if (has_dynamic_methods) \
1284 /* These methods could go away anytime, so compute the stack trace now */ \
1285 MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex)); \
1287 g_list_free (trace_ips); \
1291 * mono_handle_exception_internal_first_pass:
1293 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1294 * OBJ is found. Run the index of the filter clause which caught the exception into
1295 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1298 mono_handle_exception_internal_first_pass (MonoContext *ctx, gpointer obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1300 MonoDomain *domain = mono_domain_get ();
1301 MonoJitInfo *ji = NULL;
1302 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1303 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1304 MonoLMF *lmf = mono_get_lmf ();
1305 MonoArray *initial_trace_ips = NULL;
1306 GList *trace_ips = NULL;
1307 MonoException *mono_ex;
1308 gboolean stack_overflow = FALSE;
1309 MonoContext initial_ctx;
1311 int frame_count = 0;
1312 gboolean has_dynamic_methods = FALSE;
1317 g_assert (ctx != NULL);
1319 if (obj == domain->stack_overflow_ex)
1320 stack_overflow = TRUE;
1322 mono_ex = (MonoException*)obj;
1323 initial_trace_ips = mono_ex->trace_ips;
1325 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1326 mono_ex = (MonoException*)obj;
1327 initial_trace_ips = mono_ex->trace_ips;
1333 call_filter = mono_get_call_filter ();
1335 g_assert (jit_tls->end_of_stack);
1336 g_assert (jit_tls->abort_func);
1339 *out_filter_idx = -1;
1343 *out_prev_ji = NULL;
1348 MonoContext new_ctx;
1350 int clause_index_start = 0;
1351 gboolean unwind_res = TRUE;
1353 StackFrameInfo frame;
1358 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1360 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1364 g_assert (frame.type == FRAME_TYPE_MANAGED);
1369 setup_managed_stacktrace_information ();
1374 method = jinfo_get_method (ji);
1375 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1377 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1378 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1379 "The native frame called the managed method:\n%s\n",
1380 mono_method_full_name (method, TRUE));
1383 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1385 * Avoid overwriting the stack trace if the exception is
1386 * rethrown. Also avoid giant stack traces during a stack
1389 if (!initial_trace_ips && (frame_count < 1000)) {
1390 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1391 trace_ips = g_list_prepend (trace_ips,
1392 get_generic_info_from_stack_frame (ji, ctx));
1396 if (method->dynamic)
1397 has_dynamic_methods = TRUE;
1399 if (stack_overflow) {
1400 if (DOES_STACK_GROWS_UP)
1401 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1403 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1405 free_stack = 0xffffff;
1408 for (i = clause_index_start; i < ji->num_clauses; i++) {
1409 MonoJitExceptionInfo *ei = &ji->clauses [i];
1410 gboolean filtered = FALSE;
1413 * During stack overflow, wait till the unwinding frees some stack
1414 * space before running handlers/finalizers.
1416 if (free_stack <= (64 * 1024))
1419 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1421 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1424 * Have to unwrap RuntimeWrappedExceptions if the
1425 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1427 if (non_exception && !wrap_non_exception_throws (method))
1428 ex_obj = non_exception;
1432 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1433 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1434 #ifndef DISABLE_PERFCOUNTERS
1435 mono_perfcounters->exceptions_filters++;
1437 mono_debugger_call_exception_handler (ei->data.filter, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1440 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1441 trim the stackframe since if it returns FALSE we lose information.
1443 FIXME Not 100% sure if it's a good idea even with user clauses.
1446 setup_managed_stacktrace_information ();
1448 if (ji->from_llvm) {
1449 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1450 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1452 g_assert_not_reached ();
1455 /* store the exception object in bp + ei->exvar_offset */
1456 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1459 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1460 filtered = call_filter (ctx, ei->data.filter);
1461 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1462 if (filtered && out_filter_idx)
1463 *out_filter_idx = filter_idx;
1470 setup_managed_stacktrace_information ();
1471 /* mono_debugger_agent_handle_exception () needs this */
1472 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1477 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1478 setup_managed_stacktrace_information ();
1483 /* mono_debugger_agent_handle_exception () needs this */
1484 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1493 g_assert_not_reached ();
1497 * mono_handle_exception_internal:
1498 * @ctx: saved processor state
1499 * @obj: the exception object
1500 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1503 mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gboolean resume, MonoJitInfo **out_ji)
1505 MonoDomain *domain = mono_domain_get ();
1506 MonoJitInfo *ji, *prev_ji;
1507 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1508 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1509 MonoLMF *lmf = mono_get_lmf ();
1510 MonoException *mono_ex;
1511 gboolean stack_overflow = FALSE;
1512 MonoContext initial_ctx;
1514 int frame_count = 0;
1515 gint32 filter_idx, first_filter_idx;
1518 MonoObject *non_exception = NULL;
1520 g_assert (ctx != NULL);
1522 MonoException *ex = mono_get_exception_null_reference ();
1523 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1524 obj = (MonoObject *)ex;
1528 * Allocate a new exception object instead of the preconstructed ones.
1530 if (obj == domain->stack_overflow_ex) {
1532 * It is not a good idea to try and put even more pressure on the little stack available.
1533 * obj = mono_get_exception_stack_overflow ();
1535 stack_overflow = TRUE;
1537 else if (obj == domain->null_reference_ex) {
1538 obj = mono_get_exception_null_reference ();
1541 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1542 non_exception = obj;
1543 obj = mono_get_exception_runtime_wrapped (obj);
1546 mono_ex = (MonoException*)obj;
1548 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1549 mono_ex = (MonoException*)obj;
1554 if (mono_ex && jit_tls->class_cast_from) {
1555 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1556 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1557 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1558 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1559 mono_ex->message = mono_string_new (domain, msg);
1564 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1565 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1566 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1567 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1568 mono_ex->message = mono_string_new (domain, msg);
1576 call_filter = mono_get_call_filter ();
1578 g_assert (jit_tls->end_of_stack);
1579 g_assert (jit_tls->abort_func);
1582 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1583 * end up being TRUE on any code path.
1585 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1590 MonoContext ctx_cp = *ctx;
1591 if (mono_trace_is_enabled ()) {
1592 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1593 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1594 MonoObject *message;
1595 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1597 MonoObject *exc = NULL;
1598 if (get_message == NULL) {
1600 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1602 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1604 message = mono_runtime_invoke (get_message, obj, NULL, &exc);
1608 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1610 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1612 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1613 mono_print_thread_dump_from_ctx (ctx);
1615 jit_tls->orig_ex_ctx_set = TRUE;
1616 mono_profiler_exception_thrown (obj);
1617 jit_tls->orig_ex_ctx_set = FALSE;
1619 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1622 if (mini_get_debug_options ()->break_on_exc)
1624 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1626 if (mini_get_debug_options ()->suspend_on_unhandled) {
1627 mono_runtime_printf_err ("Unhandled exception, suspending...");
1632 // FIXME: This runs managed code so it might cause another stack overflow when
1633 // we are handling a stack overflow
1634 mono_unhandled_exception (obj);
1636 gboolean unhandled = FALSE;
1639 * The exceptions caught by the mono_runtime_invoke () calls in mono_async_invoke () needs to be treated as
1640 * unhandled (#669836).
1641 * FIXME: The check below is hackish, but its hard to distinguish these runtime invoke calls from others
1644 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1646 MonoInternalThread *thread = mono_thread_internal_current ();
1647 if (jinfo_get_method (prev_ji) == thread->async_invoke_method)
1652 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1654 mono_debugger_agent_handle_exception (obj, ctx, &ctx_cp);
1664 MonoContext new_ctx;
1666 int clause_index_start = 0;
1667 gboolean unwind_res = TRUE;
1671 ji = jit_tls->resume_state.ji;
1672 new_ctx = jit_tls->resume_state.new_ctx;
1673 clause_index_start = jit_tls->resume_state.clause_index;
1674 lmf = jit_tls->resume_state.lmf;
1675 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1676 filter_idx = jit_tls->resume_state.filter_idx;
1678 StackFrameInfo frame;
1680 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1682 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1686 g_assert (frame.type == FRAME_TYPE_MANAGED);
1692 *(mono_get_lmf_addr ()) = lmf;
1694 jit_tls->abort_func (obj);
1695 g_assert_not_reached ();
1698 method = jinfo_get_method (ji);
1700 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1702 if (stack_overflow) {
1703 if (DOES_STACK_GROWS_UP)
1704 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1706 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1708 free_stack = 0xffffff;
1711 for (i = clause_index_start; i < ji->num_clauses; i++) {
1712 MonoJitExceptionInfo *ei = &ji->clauses [i];
1713 gboolean filtered = FALSE;
1716 * During stack overflow, wait till the unwinding frees some stack
1717 * space before running handlers/finalizers.
1719 if (free_stack <= (64 * 1024))
1722 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1724 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1727 * Have to unwrap RuntimeWrappedExceptions if the
1728 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1730 if (non_exception && !wrap_non_exception_throws (method))
1731 ex_obj = non_exception;
1735 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1736 if (ji->from_llvm) {
1737 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1738 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1740 g_assert_not_reached ();
1743 /* store the exception object in bp + ei->exvar_offset */
1744 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1748 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1750 * Filter clauses should only be run in the
1751 * first pass of exception handling.
1753 filtered = (filter_idx == first_filter_idx);
1757 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1758 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1760 * This guards against the situation that we abort a thread that is executing a finally clause
1761 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1762 * check for this situation here and resume interruption if we are below the guarded block.
1764 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1765 gboolean is_outside = FALSE;
1766 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1767 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1768 //FIXME make this stack direction aware
1769 if (catch_bp > prot_bp) {
1771 } else if (catch_bp == prot_bp) {
1772 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1773 * So we check if the catch handler_start is protected by the guarded handler protected region
1776 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1777 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1778 * There aren't any further finally/fault handler blocks down the stack over this exception.
1779 * This must be ensured by the code that installs the guard trampoline.
1781 g_assert (ji == mini_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1783 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1788 jit_tls->handler_block_return_address = NULL;
1789 jit_tls->handler_block = NULL;
1790 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1794 if (mono_trace_is_enabled () && mono_trace_eval (method))
1795 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1796 jit_tls->orig_ex_ctx_set = TRUE;
1797 mono_profiler_exception_clause_handler (method, ei->flags, i);
1798 jit_tls->orig_ex_ctx_set = FALSE;
1799 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1800 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1801 *(mono_get_lmf_addr ()) = lmf;
1802 #ifndef DISABLE_PERFCOUNTERS
1803 mono_perfcounters->exceptions_depth += frame_count;
1805 if (obj == domain->stack_overflow_ex)
1806 jit_tls->handling_stack_ovf = FALSE;
1810 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1811 (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
1812 if (mono_trace_is_enabled () && mono_trace_eval (method))
1813 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1814 jit_tls->orig_ex_ctx_set = TRUE;
1815 mono_profiler_exception_clause_handler (method, ei->flags, i);
1816 jit_tls->orig_ex_ctx_set = FALSE;
1817 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1818 call_filter (ctx, ei->handler_start);
1820 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1821 (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
1822 if (mono_trace_is_enabled () && mono_trace_eval (method))
1823 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1824 jit_tls->orig_ex_ctx_set = TRUE;
1825 mono_profiler_exception_clause_handler (method, ei->flags, i);
1826 jit_tls->orig_ex_ctx_set = FALSE;
1827 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1828 #ifndef DISABLE_PERFCOUNTERS
1829 mono_perfcounters->exceptions_finallys++;
1831 *(mono_get_lmf_addr ()) = lmf;
1832 if (ji->from_llvm) {
1834 * LLVM compiled finally handlers follow the design
1835 * of the c++ ehabi, i.e. they call a resume function
1836 * at the end instead of returning to the caller.
1837 * So save the exception handling state,
1838 * mono_resume_unwind () will call us again to continue
1841 jit_tls->resume_state.ex_obj = obj;
1842 jit_tls->resume_state.ji = ji;
1843 jit_tls->resume_state.clause_index = i + 1;
1844 jit_tls->resume_state.ctx = *ctx;
1845 jit_tls->resume_state.new_ctx = new_ctx;
1846 jit_tls->resume_state.lmf = lmf;
1847 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1848 jit_tls->resume_state.filter_idx = filter_idx;
1849 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1852 call_filter (ctx, ei->handler_start);
1858 jit_tls->orig_ex_ctx_set = TRUE;
1859 mono_profiler_exception_method_leave (method);
1860 jit_tls->orig_ex_ctx_set = FALSE;
1865 g_assert_not_reached ();
1869 * mono_debugger_handle_exception:
1871 * Notify the debugger about exceptions. Returns TRUE if the debugger wants us to stop
1872 * at the exception and FALSE to resume with the normal exception handling.
1874 * The arch code is responsible to setup @ctx in a way that MONO_CONTEXT_GET_IP () and
1875 * MONO_CONTEXT_GET_SP () point to the throw instruction; ie. before executing the
1876 * `callq throw' instruction.
1879 mono_debugger_handle_exception (MonoContext *ctx, MonoObject *obj)
1881 MonoDebuggerExceptionAction action;
1883 if (!mono_debug_using_mono_debugger ())
1887 MonoException *ex = mono_get_exception_null_reference ();
1888 MONO_OBJECT_SETREF (ex, message, mono_string_new (mono_domain_get (), "Object reference not set to an instance of an object"));
1889 obj = (MonoObject *)ex;
1892 action = _mono_debugger_throw_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1894 if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP) {
1896 * The debugger wants us to stop on the `throw' instruction.
1897 * By the time we get here, it already inserted a breakpoint there.
1900 } else if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED) {
1901 MonoContext ctx_cp = *ctx;
1902 MonoJitInfo *ji = NULL;
1906 * The debugger wants us to stop only if this exception is user-unhandled.
1909 ret = mono_handle_exception_internal_first_pass (&ctx_cp, obj, NULL, &ji, NULL, NULL);
1910 if (ret && (ji != NULL) && (jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE)) {
1912 * The exception is handled in a runtime-invoke wrapper, that means that it's unhandled
1913 * inside the method being invoked, so we handle it like a user-unhandled exception.
1920 * The exception is user-unhandled - tell the debugger to stop.
1922 return _mono_debugger_unhandled_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1926 * The exception is catched somewhere - resume with the normal exception handling and don't
1927 * stop in the debugger.
1935 * mono_debugger_run_finally:
1936 * @start_ctx: saved processor state
1938 * This method is called by the Mono Debugger to call all `finally' clauses of the
1939 * current stack frame. It's used when the user issues a `return' command to make
1940 * the current stack frame return. After returning from this method, the debugger
1941 * unwinds the stack one frame and gives control back to the user.
1943 * NOTE: This method is only used when running inside the Mono Debugger.
1946 mono_debugger_run_finally (MonoContext *start_ctx)
1948 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1949 MonoDomain *domain = mono_domain_get ();
1950 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1951 MonoLMF *lmf = mono_get_lmf ();
1952 MonoContext ctx, new_ctx;
1953 MonoJitInfo *ji, rji;
1958 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1959 if (!ji || ji == (gpointer)-1)
1963 call_filter = mono_get_call_filter ();
1965 for (i = 0; i < ji->num_clauses; i++) {
1966 MonoJitExceptionInfo *ei = &ji->clauses [i];
1968 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1969 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1970 call_filter (&ctx, ei->handler_start);
1976 * mono_handle_exception:
1977 * @ctx: saved processor state
1978 * @obj: the exception object
1981 mono_handle_exception (MonoContext *ctx, gpointer obj)
1983 #ifndef DISABLE_PERFCOUNTERS
1984 mono_perfcounters->exceptions_thrown++;
1987 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1990 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1992 #ifndef MONO_ARCH_USE_SIGACTION
1993 #error "Can't use sigaltstack without sigaction"
1996 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
1999 mono_setup_altstack (MonoJitTlsData *tls)
2003 guint8 *staddr = NULL;
2005 if (mono_running_on_valgrind ())
2008 mono_thread_get_stack_bounds (&staddr, &stsize);
2012 tls->end_of_stack = staddr + stsize;
2013 tls->stack_size = stsize;
2015 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2017 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2018 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2020 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2022 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2023 /* mprotect can fail for the main thread stack */
2024 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);
2025 g_assert (gaddr == tls->stack_ovf_guard_base);
2026 tls->stack_ovf_valloced = TRUE;
2029 /* Setup an alternate signal stack */
2030 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
2031 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2033 g_assert (tls->signal_stack);
2035 sa.ss_sp = tls->signal_stack;
2036 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2038 g_assert (sigaltstack (&sa, NULL) == 0);
2040 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);
2044 mono_free_altstack (MonoJitTlsData *tls)
2049 sa.ss_sp = tls->signal_stack;
2050 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2051 sa.ss_flags = SS_DISABLE;
2052 err = sigaltstack (&sa, NULL);
2053 g_assert (err == 0);
2055 if (tls->signal_stack)
2056 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
2057 if (tls->stack_ovf_valloced)
2058 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
2060 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2063 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2066 mono_setup_altstack (MonoJitTlsData *tls)
2071 mono_free_altstack (MonoJitTlsData *tls)
2075 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2078 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2080 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2081 /* we need to leave some room for throwing the exception */
2082 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2083 unprotect_size -= mono_pagesize ();
2084 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2085 * is sufficient stack
2087 //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);
2089 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2090 return unprotect_size == jit_tls->stack_ovf_guard_size;
2093 static G_GNUC_UNUSED void
2094 try_more_restore (void)
2096 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2097 if (try_restore_stack_protection (jit_tls, 500))
2098 jit_tls->restore_stack_prot = NULL;
2101 static G_GNUC_UNUSED void
2102 restore_stack_protection (void)
2104 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2105 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2106 /* if we can't restore the stack protection, keep a callback installed so
2107 * we'll try to restore as much stack as we can at each return from unmanaged
2110 if (try_restore_stack_protection (jit_tls, 4096))
2111 jit_tls->restore_stack_prot = NULL;
2113 jit_tls->restore_stack_prot = try_more_restore_tramp;
2114 /* here we also throw a stack overflow exception */
2115 ex->trace_ips = NULL;
2116 ex->stack_trace = NULL;
2117 mono_raise_exception (ex);
2121 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2123 void (*func)(void) = (gpointer)tramp_data;
2129 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2131 /* we got a stack overflow in the soft-guard pages
2132 * There are two cases:
2133 * 1) managed code caused the overflow: we unprotect the soft-guard page
2134 * and let the arch-specific code trigger the exception handling mechanism
2135 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2136 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2137 * and hope we can continue with those enabled, at least until the hard-guard page
2138 * is hit. The alternative to continuing here is to just print a message and abort.
2139 * We may add in the future the code to protect the pages again in the codepath
2140 * when we return from unmanaged to managed code.
2142 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2143 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2144 /* we unprotect the minimum amount we can */
2146 gboolean handled = FALSE;
2148 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2149 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2150 guard_size -= mono_pagesize ();
2152 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2153 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2154 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);
2155 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2157 mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
2162 /* We print a message: after this even managed stack overflows
2163 * may crash the runtime
2165 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2166 if (!jit_tls->handling_stack_ovf) {
2167 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2168 jit_tls->handling_stack_ovf = 1;
2170 /*fprintf (stderr, "Already handling stack overflow\n");*/
2179 MonoMethod *omethod;
2181 } PrintOverflowUserData;
2184 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2186 MonoMethod *method = NULL;
2187 PrintOverflowUserData *user_data = data;
2191 method = jinfo_get_method (frame->ji);
2194 if (user_data->count == 0) {
2195 /* The first frame is in its prolog, so a line number cannot be computed */
2196 user_data->count ++;
2200 /* If this is a one method overflow, skip the other instances */
2201 if (method == user_data->omethod)
2204 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2205 mono_runtime_printf_err (" %s", location);
2208 if (user_data->count == 1) {
2209 mono_runtime_printf_err (" <...>");
2210 user_data->omethod = method;
2212 user_data->omethod = NULL;
2215 user_data->count ++;
2217 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2223 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2225 PrintOverflowUserData ud;
2228 /* we don't do much now, but we can warn the user with a useful message */
2229 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2231 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2232 mono_arch_sigctx_to_monoctx (ctx, &mctx);
2234 mono_runtime_printf_err ("Stacktrace:");
2236 memset (&ud, 0, sizeof (ud));
2238 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2240 if (ji && jinfo_get_method (ji))
2241 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2243 mono_runtime_printf_err ("At <unmanaged>.");
2250 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2252 MonoMethod *method = NULL;
2255 method = jinfo_get_method (frame->ji);
2258 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2259 mono_runtime_printf_err (" %s", location);
2262 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2267 static G_GNUC_UNUSED gboolean
2268 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2270 GString *p = (GString*)data;
2271 MonoMethod *method = NULL;
2274 method = jinfo_get_method (frame->ji);
2277 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2278 g_string_append_printf (p, " %s\n", location);
2281 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2286 static gboolean handling_sigsegv = FALSE;
2289 * mono_handle_native_sigsegv:
2291 * Handle a SIGSEGV received while in native code by printing diagnostic
2292 * information and aborting.
2295 mono_handle_native_sigsegv (int signal, void *ctx)
2297 #ifdef MONO_ARCH_USE_SIGACTION
2298 struct sigaction sa;
2300 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2301 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2303 if (handling_sigsegv)
2306 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2307 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2312 /* To prevent infinite loops when the stack walk causes a crash */
2313 handling_sigsegv = TRUE;
2315 /* !jit_tls means the thread was not registered with the runtime */
2316 if (jit_tls && mono_thread_internal_current ()) {
2317 mono_runtime_printf_err ("Stacktrace:\n");
2319 mono_walk_stack (print_stack_frame_to_stderr, TRUE, NULL);
2322 #ifdef HAVE_BACKTRACE_SYMBOLS
2328 mono_runtime_printf_err ("\nNative stacktrace:\n");
2330 size = backtrace (array, 256);
2331 names = backtrace_symbols (array, size);
2332 for (i =0; i < size; ++i) {
2333 mono_runtime_printf_err ("\t%s", names [i]);
2337 /* Try to get more meaningful information using gdb */
2339 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2340 if (!mini_get_debug_options ()->no_gdb_backtrace && !mono_debug_using_mono_debugger ()) {
2341 /* From g_spawn_command_line_sync () in eglib */
2344 pid_t crashed_pid = getpid ();
2348 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2349 * it will deadlock. Call the syscall directly instead.
2351 pid = mono_runtime_syscall_fork ();
2354 dup2 (STDERR_FILENO, STDOUT_FILENO);
2356 mono_gdb_render_native_backtraces (crashed_pid);
2360 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2361 waitpid (pid, &status, 0);
2368 * A SIGSEGV indicates something went very wrong so we can no longer depend
2369 * on anything working. So try to print out lots of diagnostics, starting
2370 * with ones which have a greater chance of working.
2372 mono_runtime_printf_err (
2374 "=================================================================\n"
2375 "Got a %s while executing native code. This usually indicates\n"
2376 "a fatal error in the mono runtime or one of the native libraries \n"
2377 "used by your application.\n"
2378 "=================================================================\n",
2382 #ifdef MONO_ARCH_USE_SIGACTION
2384 /* Remove our SIGABRT handler */
2385 sa.sa_handler = SIG_DFL;
2386 sigemptyset (&sa.sa_mask);
2389 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2393 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2394 #if defined (PLATFORM_ANDROID)
2402 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2404 MonoInternalThread *thread = mono_thread_internal_current ();
2405 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2408 GString* text = g_string_new (0);
2409 char *name, *wapi_desc;
2410 GError *error = NULL;
2413 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2415 g_string_append_printf (text, "\n\"%s\"", name);
2418 else if (thread->threadpool_thread)
2419 g_string_append (text, "\n\"<threadpool thread>\"");
2421 g_string_append (text, "\n\"<unnamed thread>\"");
2424 wapi_desc = wapi_current_thread_desc ();
2425 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2429 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2431 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2433 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2435 mono_arch_sigctx_to_monoctx (sigctx, &ctx);
2437 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2439 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2442 mono_runtime_printf ("%s", text->str);
2444 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2445 OutputDebugStringA(text->str);
2448 g_string_free (text, TRUE);
2449 mono_runtime_stdout_fflush ();
2453 * mono_print_thread_dump:
2455 * Print information about the current thread to stdout.
2456 * SIGCTX can be NULL, allowing this to be called from gdb.
2459 mono_print_thread_dump (void *sigctx)
2461 mono_print_thread_dump_internal (sigctx, NULL);
2465 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2467 mono_print_thread_dump_internal (NULL, ctx);
2471 * mono_resume_unwind:
2473 * This is called by a trampoline from LLVM compiled finally clauses to continue
2477 mono_resume_unwind (MonoContext *ctx)
2479 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2480 MonoContext new_ctx;
2482 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2483 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2486 mono_handle_exception_internal (&new_ctx, jit_tls->resume_state.ex_obj, TRUE, NULL);
2488 mono_restore_context (&new_ctx);
2491 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2496 MonoJitExceptionInfo *ei;
2497 } FindHandlerBlockData;
2500 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2504 FindHandlerBlockData *pdata = data;
2505 MonoJitInfo *ji = frame->ji;
2510 ip = MONO_CONTEXT_GET_IP (ctx);
2512 for (i = 0; i < ji->num_clauses; ++i) {
2513 MonoJitExceptionInfo *ei = ji->clauses + i;
2514 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2516 /*If ip points to the first instruction it means the handler block didn't start
2517 so we can leave its execution to the EH machinery*/
2518 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2530 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2533 MonoJitExceptionInfo *clause = NULL;
2536 ip = MONO_CONTEXT_GET_IP (ctx);
2538 for (i = 0; i < ji->num_clauses; ++i) {
2539 clause = &ji->clauses [i];
2540 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2542 if (clause->handler_start < ip && clause->data.handler_end > ip)
2546 /*no matching finally */
2547 if (i == ji->num_clauses)
2550 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2551 if (ip == clause->handler_start)
2554 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2558 * Finds the bottom handler block running and install a block guard if needed.
2559 * FIXME add full-aot support.
2562 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2564 FindHandlerBlockData data = { 0 };
2565 MonoJitTlsData *jit_tls = ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2572 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2573 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2575 if (!jit_tls || jit_tls->handler_block_return_address)
2578 /* Do an async safe stack walk */
2579 mono_thread_info_set_is_async_context (TRUE);
2580 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2581 mono_thread_info_set_is_async_context (FALSE);
2586 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2588 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2589 if (resume_ip == NULL)
2592 jit_tls->handler_block_return_address = resume_ip;
2593 jit_tls->handler_block = data.ei;
2600 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2608 mono_set_cast_details (MonoClass *from, MonoClass *to)
2610 MonoJitTlsData *jit_tls = NULL;
2612 if (mini_get_debug_options ()->better_cast_details) {
2613 jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2614 jit_tls->class_cast_from = from;
2615 jit_tls->class_cast_to = to;
2620 /*returns false if the thread is not attached*/
2622 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2624 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2625 MonoInternalThread *thread = mono_thread_internal_current ();
2626 if (!thread || !thread->jit_data) {
2632 mono_arch_sigctx_to_monoctx (sigctx, &ctx->ctx);
2634 #if MONO_ARCH_HAS_MONO_CONTEXT && !defined(MONO_CROSS_COMPILE)
2635 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2637 g_error ("Use a null sigctx requires a working mono-context");
2640 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2641 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2642 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2646 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2652 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2654 MonoInternalThread *thread = mono_thread_internal_current ();
2655 if (!thread || !thread->jit_data) {
2661 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2662 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2663 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2668 /*returns false if the thread is not attached*/
2670 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2672 MonoInternalThread *thread = mono_thread_internal_current ();
2673 MONO_ARCH_CONTEXT_DEF
2675 mono_arch_flush_register_windows ();
2677 if (!thread || !thread->jit_data) {
2681 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2682 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2684 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2687 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2688 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2689 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2695 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2697 mono_handle_exception (ctx, exc);
2698 mono_restore_context (ctx);
2701 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2703 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2705 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2706 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2707 jit_tls->ex_ctx = *ctx;
2709 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2711 g_error ("This target doesn't support mono_arch_setup_async_callback");
2716 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2718 unhandled_exception_hook = func;
2719 unhandled_exception_hook_data = user_data;
2723 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2725 if (unhandled_exception_hook) {
2726 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2728 MonoObject *other = NULL;
2729 MonoString *str = mono_object_to_string (exc, &other);
2733 msg = mono_string_to_utf8 (str);
2735 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2736 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2738 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2739 original_backtrace, nested_backtrace);
2741 g_free (original_backtrace);
2742 g_free (nested_backtrace);
2744 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2746 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2748 #if defined(__APPLE__) && defined(__arm__)
2749 g_assertion_message ("Terminating runtime due to unhandled exception");
2751 exit (mono_environment_exitcode_get ());
2755 g_assert_not_reached ();
2759 * mono_restore_context:
2761 * Call the architecture specific restore context function.
2764 mono_restore_context (MonoContext *ctx)
2766 static void (*restore_context) (MonoContext *);
2768 if (!restore_context)
2769 restore_context = mono_get_restore_context ();
2770 restore_context (ctx);
2771 g_assert_not_reached ();