2 * mini-exceptions.c: generic exception support
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Mono Team (mono-list@lists.ximian.com)
8 * Copyright 2001-2003 Ximian, Inc.
9 * Copyright 2003-2008 Novell, Inc.
10 * Copyright 2011 Xamarin Inc (http://www.xamarin.com).
18 #ifdef HAVE_EXECINFO_H
22 #ifdef HAVE_SYS_TYPES_H
23 #include <sys/types.h>
26 #ifdef HAVE_SYS_WAIT_H
34 #ifdef HAVE_SYS_SYSCALL_H
35 #include <sys/syscall.h>
38 #include <mono/metadata/appdomain.h>
39 #include <mono/metadata/tabledefs.h>
40 #include <mono/metadata/threads.h>
41 #include <mono/metadata/threads-types.h>
42 #include <mono/metadata/debug-helpers.h>
43 #include <mono/metadata/exception.h>
44 #include <mono/metadata/gc-internal.h>
45 #include <mono/metadata/mono-debug.h>
46 #include <mono/metadata/profiler.h>
47 #include <mono/metadata/mono-endian.h>
48 #include <mono/metadata/environment.h>
49 #include <mono/utils/mono-mmap.h>
50 #include <mono/utils/mono-logger-internal.h>
53 #include "debug-mini.h"
55 #include "debugger-agent.h"
57 #ifndef MONO_ARCH_CONTEXT_DEF
58 #define MONO_ARCH_CONTEXT_DEF
61 static gpointer restore_context_func, call_filter_func;
62 static gpointer throw_exception_func, rethrow_exception_func;
63 static gpointer throw_corlib_exception_func;
65 static gpointer try_more_restore_tramp = NULL;
66 static gpointer restore_stack_protection_tramp = NULL;
68 static MonoUnhandledExceptionFunc unhandled_exception_hook = NULL;
69 static gpointer unhandled_exception_hook_data = NULL;
71 static void try_more_restore (void);
72 static void restore_stack_protection (void);
73 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
74 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
75 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
78 mono_exceptions_init (void)
80 MonoRuntimeExceptionHandlingCallbacks cbs;
82 restore_context_func = mono_aot_get_trampoline ("restore_context");
83 call_filter_func = mono_aot_get_trampoline ("call_filter");
84 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
85 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
89 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
91 mono_save_trampoline_xdebug_info (info);
92 mono_tramp_info_free (info);
94 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
96 mono_save_trampoline_xdebug_info (info);
97 mono_tramp_info_free (info);
99 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
101 mono_save_trampoline_xdebug_info (info);
102 mono_tramp_info_free (info);
104 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
106 mono_save_trampoline_xdebug_info (info);
107 mono_tramp_info_free (info);
110 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
111 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
112 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
115 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
116 mono_arch_exceptions_init ();
118 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
119 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
120 cbs.mono_raise_exception = mono_get_throw_exception ();
121 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
122 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
123 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
124 mono_install_eh_callbacks (&cbs);
128 mono_get_throw_exception (void)
130 g_assert (throw_exception_func);
131 return throw_exception_func;
135 mono_get_rethrow_exception (void)
137 g_assert (rethrow_exception_func);
138 return rethrow_exception_func;
142 mono_get_call_filter (void)
144 g_assert (call_filter_func);
145 return call_filter_func;
149 mono_get_restore_context (void)
151 g_assert (restore_context_func);
152 return restore_context_func;
156 mono_get_throw_corlib_exception (void)
158 gpointer code = NULL;
161 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
162 if (throw_corlib_exception_func)
163 return throw_corlib_exception_func;
166 code = mono_aot_get_trampoline ("throw_corlib_exception");
168 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
170 mono_save_trampoline_xdebug_info (info);
171 mono_tramp_info_free (info);
175 mono_memory_barrier ();
177 throw_corlib_exception_func = code;
179 return throw_corlib_exception_func;
183 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
185 MonoTryBlockHoleTableJitInfo *table;
190 if (ei->try_start > ip || ip >= ei->try_end)
193 if (!ji->has_try_block_holes)
196 table = mono_jit_info_get_try_block_hole_table_info (ji);
197 offset = (guint32)((char*)ip - (char*)ji->code_start);
198 clause = (guint16)(ei - ji->clauses);
199 g_assert (clause < ji->num_clauses);
201 for (i = 0; i < table->num_holes; ++i) {
202 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
203 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
212 * Translate between the mono_arch_find_jit_info function and the old API.
215 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
216 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
218 StackFrameInfo frame;
221 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
223 /* Avoid costly table lookup during stack overflow */
224 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
227 ji = mini_jit_info_table_find (domain, ip, NULL);
232 err = mono_arch_find_jit_info (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
236 /* Convert between the new and the old APIs */
237 switch (frame.type) {
238 case FRAME_TYPE_MANAGED:
242 case FRAME_TYPE_MANAGED_TO_NATIVE:
246 memset (res, 0, sizeof (MonoJitInfo));
247 res->d.method = frame.method;
250 case FRAME_TYPE_DEBUGGER_INVOKE: {
254 * The normal exception handling code can't handle this frame, so just
257 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
258 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
262 g_assert_not_reached ();
267 /* mono_find_jit_info:
269 * This function is used to gather information from @ctx. It return the
270 * MonoJitInfo of the corresponding function, unwinds one stack frame and
271 * stores the resulting context into @new_ctx. It also stores a string
272 * describing the stack location into @trace (if not NULL), and modifies
273 * the @lmf if necessary. @native_offset return the IP offset from the
274 * start of the function or -1 if that info is not available.
277 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
278 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
282 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
284 MonoMethod *method = NULL;
295 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
297 if (ji == (gpointer)-1)
301 method = jinfo_get_method (ji);
303 if (managed2 || (ji && method->wrapper_type)) {
304 const char *real_ip, *start;
307 start = (const char *)ji->code_start;
309 /* ctx->ip points into native code */
310 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
312 real_ip = (const char*)ip;
314 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
315 offset = real_ip - start;
320 *native_offset = offset;
323 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
327 *trace = mono_debug_print_stack_frame (method, offset, domain);
330 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
331 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
340 * mono_find_jit_info_ext:
342 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
344 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
345 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
346 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
347 * to obtain the last managed frame.
348 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
349 * On return, it will be filled with the locations where callee saved registers are saved
350 * by the current frame. This is returned outside of StackFrameInfo because it can be
351 * quite large on some platforms.
354 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
355 MonoJitInfo *prev_ji, MonoContext *ctx,
356 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
357 mgreg_t **save_locations,
358 StackFrameInfo *frame)
361 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
363 MonoDomain *target_domain = domain;
364 MonoMethod *method = NULL;
369 /* Avoid costly table lookup during stack overflow */
370 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
373 ji = mini_jit_info_table_find (domain, ip, &target_domain);
376 target_domain = domain;
379 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
381 err = mono_arch_find_jit_info (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
386 method = jinfo_get_method (frame->ji);
388 if (frame->type == FRAME_TYPE_MANAGED) {
389 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
390 frame->managed = TRUE;
393 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
395 * This type of frame is just a marker, the caller should unwind once more to get the
396 * last managed frame.
399 frame->method = NULL;
402 frame->native_offset = -1;
403 frame->domain = target_domain;
407 if (frame->type == FRAME_TYPE_MANAGED)
408 frame->method = method;
410 if (ji && (frame->managed || method->wrapper_type)) {
411 const char *real_ip, *start;
413 start = (const char *)ji->code_start;
415 /* ctx->ip points into native code */
416 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
418 real_ip = (const char*)ip;
420 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
421 frame->native_offset = real_ip - start;
423 frame->native_offset = -1;
426 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
428 if (trace && frame->method) {
429 char *fname = mono_method_full_name (frame->method, TRUE);
430 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
439 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
441 MonoGenericJitInfo *gi;
445 if (!ji->has_generic_jit_info)
447 gi = mono_jit_info_get_generic_jit_info (ji);
453 * Search location list if available, it contains the precise location of the
454 * argument for every pc offset, even if the method was interrupted while it was in
458 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
461 for (i = 0; i < gi->nlocs; ++i) {
462 MonoDwarfLocListEntry *entry = &gi->locations [i];
464 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
466 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
468 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
472 g_assert (i < gi->nlocs);
475 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
477 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
481 method = jinfo_get_method (ji);
482 if (mono_method_get_context (method)->method_inst) {
484 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
487 /* Avoid returning a managed object */
488 MonoObject *this_obj = info;
490 return this_obj->vtable->klass;
494 static MonoGenericContext
495 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
497 MonoGenericContext context = { NULL, NULL };
498 MonoClass *class, *method_container_class;
501 g_assert (generic_info);
503 method = jinfo_get_method (ji);
504 g_assert (method->is_inflated);
505 if (mono_method_get_context (method)->method_inst) {
506 MonoMethodRuntimeGenericContext *mrgctx = generic_info;
508 class = mrgctx->class_vtable->klass;
509 context.method_inst = mrgctx->method_inst;
510 g_assert (context.method_inst);
511 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
512 MonoVTable *vtable = generic_info;
514 class = vtable->klass;
516 class = generic_info;
519 //g_assert (!method->klass->generic_container);
520 if (method->klass->generic_class)
521 method_container_class = method->klass->generic_class->container_class;
523 method_container_class = method->klass;
525 /* class might refer to a subclass of method's class */
526 while (!(class == method->klass || (class->generic_class && class->generic_class->container_class == method_container_class))) {
527 class = class->parent;
531 if (class->generic_class || class->generic_container)
532 context.class_inst = mini_class_get_context (class)->class_inst;
534 if (class->generic_class)
535 g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
537 g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
543 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
545 MonoGenericContext context;
548 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
549 return jinfo_get_method (ji);
550 context = get_generic_context_from_stack_frame (ji, generic_info);
552 method = jinfo_get_method (ji);
553 method = mono_method_get_declaring_generic_method (method);
554 method = mono_class_inflate_generic_method (method, &context);
560 * mono_exception_walk_native_trace:
561 * @ex: The exception object whose frames should be walked
562 * @func: callback to call for each stack frame
563 * @user_data: data passed to the callback
565 * This function walks the stacktrace of an exception. For
566 * each frame the callback function is called with the relevant info.
567 * The walk ends when no more stack frames are found or when the callback
568 * returns a TRUE value.
572 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
574 MonoDomain *domain = mono_domain_get ();
575 MonoArray *ta = ex->trace_ips;
581 len = mono_array_length (ta) >> 1;
582 for (i = 0; i < len; i++) {
583 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
584 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
585 MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
588 if (func (NULL, ip, 0, FALSE, user_data))
591 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
592 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
601 ves_icall_System_Exception_get_trace (MonoException *ex)
603 MonoDomain *domain = mono_domain_get ();
605 MonoArray *ta = ex->trace_ips;
610 /* Exception is not thrown yet */
613 len = mono_array_length (ta) >> 1;
614 trace_str = g_string_new ("");
615 for (i = 0; i < len; i++) {
617 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
618 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
620 ji = mono_jit_info_table_find (domain, ip);
622 /* Unmanaged frame */
623 g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
627 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
629 address = (char *)ip - (char *)ji->code_start;
630 location = mono_debug_print_stack_frame (
631 method, address, ex->object.vtable->domain);
633 g_string_append_printf (trace_str, "%s\n", location);
638 res = mono_string_new (ex->object.vtable->domain, trace_str->str);
639 g_string_free (trace_str, TRUE);
645 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
647 MonoDomain *domain = mono_domain_get ();
649 MonoArray *ta = exc->trace_ips;
650 MonoDebugSourceLocation *location;
654 /* Exception is not thrown yet */
655 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
658 len = mono_array_length (ta) >> 1;
660 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
662 for (i = skip; i < len; i++) {
664 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
665 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
666 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
669 ji = mono_jit_info_table_find (domain, ip);
671 /* Unmanaged frame */
672 mono_array_setref (res, i, sf);
676 g_assert (ji != NULL);
678 method = get_method_from_stack_frame (ji, generic_info);
679 if (jinfo_get_method (ji)->wrapper_type) {
683 s = mono_method_full_name (method, TRUE);
684 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
688 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
689 sf->native_offset = (char *)ip - (char *)ji->code_start;
692 * mono_debug_lookup_source_location() returns both the file / line number information
693 * and the IL offset. Note that computing the IL offset is already an expensive
694 * operation, so we shouldn't call this method twice.
696 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
698 sf->il_offset = location->il_offset;
702 if (need_file_info) {
703 if (location && location->source_file) {
704 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
705 sf->line = location->row;
706 sf->column = location->column;
708 sf->line = sf->column = 0;
713 mono_debug_free_source_location (location);
714 mono_array_setref (res, i, sf);
721 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
724 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
725 if (jit_tls && jit_tls->orig_ex_ctx_set)
726 start_ctx = &jit_tls->orig_ex_ctx;
728 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
731 * mono_walk_stack_with_ctx:
733 * Unwind the current thread starting at @start_ctx.
735 * If @start_ctx is null, we capture the current context.
738 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
740 MonoContext extra_ctx;
741 MonoInternalThread *thread = mono_thread_internal_current ();
742 MONO_ARCH_CONTEXT_DEF
744 if (!thread || !thread->jit_data)
748 mono_arch_flush_register_windows ();
750 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
751 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
753 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
755 start_ctx = &extra_ctx;
758 mono_walk_stack_full (func, start_ctx, mono_domain_get (), thread->jit_data, mono_get_lmf (), unwind_options, user_data);
762 * mono_walk_stack_with_state:
764 * Unwind a thread described by @state.
766 * State must be valid (state->valid == TRUE).
768 * If you are using this function to unwind another thread, make sure it is suspended.
770 * If @state is null, we capture the current context.
773 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
775 MonoThreadUnwindState extra_state;
777 if (!mono_thread_state_init_from_current (&extra_state))
779 state = &extra_state;
782 g_assert (state->valid);
784 mono_walk_stack_full (func,
786 state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
787 state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
788 state->unwind_data [MONO_UNWIND_DATA_LMF],
789 unwind_options, user_data);
793 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
795 MonoThreadUnwindState state;
796 if (!mono_thread_state_init_from_current (&state))
798 mono_walk_stack_with_state (func, &state, options, user_data);
802 * mono_walk_stack_full:
803 * @func: callback to call for each stack frame
804 * @domain: starting appdomain, can be NULL to use the current domain
805 * @unwind_options: what extra information the unwinder should gather
806 * @start_ctx: starting state of the stack walk, can be NULL.
807 * @thread: the thread whose stack to walk, can be NULL to use the current thread
808 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
809 * @user_data: data passed to the callback
811 * This function walks the stack of a thread, starting from the state
812 * represented by start_ctx. For each frame the callback
813 * function is called with the relevant info. The walk ends when no more
814 * managed stack frames are found or when the callback returns a TRUE value.
817 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
820 MonoContext ctx, new_ctx;
821 StackFrameInfo frame;
823 mgreg_t *reg_locations [MONO_MAX_IREGS];
824 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
825 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
827 g_assert (start_ctx);
830 /*The LMF will be null if the target have no managed frames.*/
831 /* g_assert (lmf); */
833 memcpy (&ctx, start_ctx, sizeof (MonoContext));
834 memset (reg_locations, 0, sizeof (reg_locations));
836 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
838 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
842 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji) {
843 MonoDebugSourceLocation *source;
845 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
846 il_offset = source ? source->il_offset : -1;
847 mono_debug_free_source_location (source);
851 frame.il_offset = il_offset;
853 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji) {
854 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
856 frame.actual_method = frame.method;
859 if (get_reg_locations)
860 frame.reg_locations = reg_locations;
862 if (func (&frame, &ctx, user_data))
865 if (get_reg_locations) {
866 for (i = 0; i < MONO_MAX_IREGS; ++i)
867 if (new_reg_locations [i])
868 reg_locations [i] = new_reg_locations [i];
876 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
877 MonoReflectionMethod **method,
878 gint32 *iloffset, gint32 *native_offset,
879 MonoString **file, gint32 *line, gint32 *column)
881 MonoDomain *domain = mono_domain_get ();
882 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
883 MonoLMF *lmf = mono_get_lmf ();
884 MonoJitInfo *ji = NULL;
885 MonoContext ctx, new_ctx;
886 MonoDebugSourceLocation *location;
887 MonoMethod *jmethod, *actual_method;
888 StackFrameInfo frame;
891 MONO_ARCH_CONTEXT_DEF;
893 mono_arch_flush_register_windows ();
895 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
896 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
898 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
904 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
908 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE || frame.type == FRAME_TYPE_DEBUGGER_INVOKE)
912 *native_offset = frame.native_offset;
914 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
915 jmethod = jinfo_get_method (ji);
916 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
921 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
923 mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
925 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
927 *iloffset = location->il_offset;
931 if (need_file_info) {
933 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
934 *line = location->row;
935 *column = location->column;
942 mono_debug_free_source_location (location);
949 MonoSecurityFrame *frame;
950 } MonoFrameSecurityInfo;
953 callback_get_first_frame_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
955 MonoFrameSecurityInfo *si = (MonoFrameSecurityInfo*) data;
956 MonoJitInfo *ji = frame->ji;
962 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
963 method = jinfo_get_method (ji);
964 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
965 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
966 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
967 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
968 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
977 si->frame = mono_declsec_create_frame (frame->domain, ji);
979 /* Stop - we only want the first frame (e.g. LinkDemand and InheritanceDemand) */
984 * ves_icall_System_Security_SecurityFrame_GetSecurityFrame:
985 * @skip: the number of stack frames to skip
987 * This function returns a the security informations of a single stack frame
988 * (after the skipped ones). This is required for [NonCas]LinkDemand[Choice]
989 * and [NonCas]InheritanceDemand[Choice] as only the caller security is
993 ves_icall_System_Security_SecurityFrame_GetSecurityFrame (gint32 skip)
995 MonoFrameSecurityInfo si;
1000 mono_walk_stack (callback_get_first_frame_security_info, MONO_UNWIND_DEFAULT, &si);
1002 return (si.skips == 0) ? si.frame : NULL;
1011 } MonoSecurityStack;
1014 grow_array (MonoSecurityStack *stack)
1016 MonoDomain *domain = mono_domain_get ();
1017 guint32 newsize = (stack->maximum << 1);
1018 MonoArray *newstack = mono_array_new (domain, mono_defaults.runtimesecurityframe_class, newsize);
1020 for (i=0; i < stack->maximum; i++) {
1021 gpointer frame = mono_array_get (stack->stack, gpointer, i);
1022 mono_array_setref (newstack, i, frame);
1024 stack->maximum = newsize;
1025 stack->stack = newstack;
1029 callback_get_stack_frames_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
1031 MonoSecurityStack *ss = (MonoSecurityStack*) data;
1032 MonoJitInfo *ji = frame->ji;
1038 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
1039 method = jinfo_get_method (ji);
1040 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1041 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1042 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
1043 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
1044 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1048 if (ss->skips > 0) {
1053 if (ss->count == ss->maximum)
1056 mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (frame->domain, ji));
1058 /* continue down the stack */
1063 glist_to_array (GList *list, MonoClass *eclass)
1065 MonoDomain *domain = mono_domain_get ();
1072 len = g_list_length (list);
1073 res = mono_array_new (domain, eclass, len);
1075 for (i = 0; list; list = list->next, i++)
1076 mono_array_set (res, gpointer, i, list->data);
1082 * ves_icall_System_Security_SecurityFrame_GetSecurityStack:
1083 * @skip: the number of stack frames to skip
1085 * This function returns an managed array of containing the security
1086 * informations for each frame (after the skipped ones). This is used for
1087 * [NonCas]Demand[Choice] where the complete evaluation of the stack is
1091 ves_icall_System_Security_SecurityFrame_GetSecurityStack (gint32 skip)
1093 MonoSecurityStack ss;
1095 #if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
1101 ss.maximum = MONO_CAS_INITIAL_STACK_SIZE;
1102 ss.stack = mono_array_new (mono_domain_get (), mono_defaults.runtimesecurityframe_class, ss.maximum);
1103 mono_walk_stack (callback_get_stack_frames_security_info, MONO_UNWIND_DEFAULT, &ss);
1104 /* g_warning ("STACK RESULT: %d out of %d", ss.count, ss.maximum); */
1109 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1111 MonoClass *catch_class = ei->data.catch_class;
1112 MonoType *inflated_type;
1113 MonoGenericContext context;
1115 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1116 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1119 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1121 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1123 /* FIXME: we shouldn't inflate but instead put the
1124 type in the rgctx and fetch it from there. It
1125 might be a good idea to do this lazily, i.e. only
1126 when the exception is actually thrown, so as not to
1127 waste space for exception clauses which might never
1129 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1130 catch_class = mono_class_from_mono_type (inflated_type);
1131 mono_metadata_free_type (inflated_type);
1137 * mini_jit_info_table_find:
1139 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1140 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1141 * OUT_DOMAIN if it is not NULL.
1144 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1147 MonoInternalThread *t = mono_thread_internal_current ();
1153 ji = mono_jit_info_table_find (domain, addr);
1156 *out_domain = domain;
1160 /* maybe it is shared code, so we also search in the root domain */
1161 if (domain != mono_get_root_domain ()) {
1162 ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
1165 *out_domain = mono_get_root_domain ();
1170 refs = (t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL;
1171 for (; refs && *refs; refs++) {
1172 if (*refs != domain && *refs != mono_get_root_domain ()) {
1173 ji = mono_jit_info_table_find ((MonoDomain*) *refs, addr);
1176 *out_domain = (MonoDomain*) *refs;
1186 * wrap_non_exception_throws:
1188 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1189 * WrapNonExceptionThrows flag set.
1192 wrap_non_exception_throws (MonoMethod *m)
1194 MonoAssembly *ass = m->klass->image->assembly;
1195 MonoCustomAttrInfo* attrs;
1196 static MonoClass *klass;
1198 gboolean val = FALSE;
1201 if (ass->wrap_non_exception_throws_inited)
1202 return ass->wrap_non_exception_throws;
1204 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1206 attrs = mono_custom_attrs_from_assembly (ass);
1208 for (i = 0; i < attrs->num_attrs; ++i) {
1209 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1211 int len, num_named, named_type, data_type, name_len;
1214 if (!attr->ctor || attr->ctor->klass != klass)
1216 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1217 len = attr->data_size;
1218 p = (const char*)attr->data;
1219 g_assert (read16 (p) == 0x0001);
1221 num_named = read16 (p);
1230 if (named_type != 0x54)
1232 name_len = mono_metadata_decode_blob_size (p, &p);
1233 name = g_malloc (name_len + 1);
1234 memcpy (name, p, name_len);
1235 name [name_len] = 0;
1237 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1239 /* The value is a BOOLEAN */
1242 mono_custom_attrs_free (attrs);
1245 ass->wrap_non_exception_throws = val;
1246 mono_memory_barrier ();
1247 ass->wrap_non_exception_throws_inited = TRUE;
1252 #ifndef MONO_ARCH_STACK_GROWS_UP
1253 #define DOES_STACK_GROWS_UP 1
1255 #define DOES_STACK_GROWS_UP 0
1258 #define MAX_UNMANAGED_BACKTRACE 128
1260 build_native_trace (void)
1262 /* This puppy only makes sense on mobile, IOW, ARM. */
1263 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1265 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1266 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1271 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1273 for (i = 0; i < size; i++)
1274 mono_array_set (res, gpointer, i, native_trace [i]);
1281 #define setup_managed_stacktrace_information() do { \
1282 if (mono_ex && !initial_trace_ips) { \
1283 trace_ips = g_list_reverse (trace_ips); \
1284 MONO_OBJECT_SETREF (mono_ex, trace_ips, glist_to_array (trace_ips, mono_defaults.int_class)); \
1285 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ()); \
1286 if (has_dynamic_methods) \
1287 /* These methods could go away anytime, so compute the stack trace now */ \
1288 MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex)); \
1290 g_list_free (trace_ips); \
1294 * mono_handle_exception_internal_first_pass:
1296 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1297 * OBJ is found. Run the index of the filter clause which caught the exception into
1298 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1301 mono_handle_exception_internal_first_pass (MonoContext *ctx, gpointer obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1303 MonoDomain *domain = mono_domain_get ();
1304 MonoJitInfo *ji = NULL;
1305 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1306 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1307 MonoLMF *lmf = mono_get_lmf ();
1308 MonoArray *initial_trace_ips = NULL;
1309 GList *trace_ips = NULL;
1310 MonoException *mono_ex;
1311 gboolean stack_overflow = FALSE;
1312 MonoContext initial_ctx;
1314 int frame_count = 0;
1315 gboolean has_dynamic_methods = FALSE;
1320 g_assert (ctx != NULL);
1322 if (obj == domain->stack_overflow_ex)
1323 stack_overflow = TRUE;
1325 mono_ex = (MonoException*)obj;
1326 initial_trace_ips = mono_ex->trace_ips;
1328 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1329 mono_ex = (MonoException*)obj;
1330 initial_trace_ips = mono_ex->trace_ips;
1336 call_filter = mono_get_call_filter ();
1338 g_assert (jit_tls->end_of_stack);
1339 g_assert (jit_tls->abort_func);
1342 *out_filter_idx = -1;
1346 *out_prev_ji = NULL;
1351 MonoContext new_ctx;
1353 int clause_index_start = 0;
1354 gboolean unwind_res = TRUE;
1356 StackFrameInfo frame;
1361 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1363 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1367 g_assert (frame.type == FRAME_TYPE_MANAGED);
1372 setup_managed_stacktrace_information ();
1377 method = jinfo_get_method (ji);
1378 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1380 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1381 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1382 "The native frame called the managed method:\n%s\n",
1383 mono_method_full_name (method, TRUE));
1386 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1388 * Avoid overwriting the stack trace if the exception is
1389 * rethrown. Also avoid giant stack traces during a stack
1392 if (!initial_trace_ips && (frame_count < 1000)) {
1393 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1394 trace_ips = g_list_prepend (trace_ips,
1395 get_generic_info_from_stack_frame (ji, ctx));
1399 if (method->dynamic)
1400 has_dynamic_methods = TRUE;
1402 if (stack_overflow) {
1403 if (DOES_STACK_GROWS_UP)
1404 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1406 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1408 free_stack = 0xffffff;
1411 for (i = clause_index_start; i < ji->num_clauses; i++) {
1412 MonoJitExceptionInfo *ei = &ji->clauses [i];
1413 gboolean filtered = FALSE;
1416 * During stack overflow, wait till the unwinding frees some stack
1417 * space before running handlers/finalizers.
1419 if (free_stack <= (64 * 1024))
1422 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1424 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1427 * Have to unwrap RuntimeWrappedExceptions if the
1428 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1430 if (non_exception && !wrap_non_exception_throws (method))
1431 ex_obj = non_exception;
1435 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1436 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1437 #ifndef DISABLE_PERFCOUNTERS
1438 mono_perfcounters->exceptions_filters++;
1440 mono_debugger_call_exception_handler (ei->data.filter, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1443 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1444 trim the stackframe since if it returns FALSE we lose information.
1446 FIXME Not 100% sure if it's a good idea even with user clauses.
1449 setup_managed_stacktrace_information ();
1451 if (ji->from_llvm) {
1452 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1453 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1455 g_assert_not_reached ();
1458 /* store the exception object in bp + ei->exvar_offset */
1459 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1462 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1463 filtered = call_filter (ctx, ei->data.filter);
1464 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1465 if (filtered && out_filter_idx)
1466 *out_filter_idx = filter_idx;
1473 setup_managed_stacktrace_information ();
1474 /* mono_debugger_agent_handle_exception () needs this */
1475 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1480 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1481 setup_managed_stacktrace_information ();
1486 /* mono_debugger_agent_handle_exception () needs this */
1487 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1496 g_assert_not_reached ();
1500 * mono_handle_exception_internal:
1501 * @ctx: saved processor state
1502 * @obj: the exception object
1503 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1506 mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gboolean resume, MonoJitInfo **out_ji)
1508 MonoDomain *domain = mono_domain_get ();
1509 MonoJitInfo *ji, *prev_ji;
1510 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1511 static void (*restore_context) (void *);
1512 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1513 MonoLMF *lmf = mono_get_lmf ();
1514 MonoException *mono_ex;
1515 gboolean stack_overflow = FALSE;
1516 MonoContext initial_ctx;
1518 int frame_count = 0;
1519 gint32 filter_idx, first_filter_idx;
1522 MonoObject *non_exception = NULL;
1524 g_assert (ctx != NULL);
1526 MonoException *ex = mono_get_exception_null_reference ();
1527 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1528 obj = (MonoObject *)ex;
1532 * Allocate a new exception object instead of the preconstructed ones.
1534 if (obj == domain->stack_overflow_ex) {
1536 * It is not a good idea to try and put even more pressure on the little stack available.
1537 * obj = mono_get_exception_stack_overflow ();
1539 stack_overflow = TRUE;
1541 else if (obj == domain->null_reference_ex) {
1542 obj = mono_get_exception_null_reference ();
1545 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1546 non_exception = obj;
1547 obj = mono_get_exception_runtime_wrapped (obj);
1550 mono_ex = (MonoException*)obj;
1552 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1553 mono_ex = (MonoException*)obj;
1558 if (mono_ex && jit_tls->class_cast_from) {
1559 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1560 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1561 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1562 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1563 mono_ex->message = mono_string_new (domain, msg);
1568 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1569 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1570 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1571 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1572 mono_ex->message = mono_string_new (domain, msg);
1580 call_filter = mono_get_call_filter ();
1582 if (!restore_context)
1583 restore_context = mono_get_restore_context ();
1585 g_assert (jit_tls->end_of_stack);
1586 g_assert (jit_tls->abort_func);
1589 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1590 * end up being TRUE on any code path.
1592 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1597 MonoContext ctx_cp = *ctx;
1598 if (mono_trace_is_enabled ()) {
1599 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1600 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1601 MonoObject *message;
1602 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1604 MonoObject *exc = NULL;
1605 if (get_message == NULL) {
1607 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1609 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1611 message = mono_runtime_invoke (get_message, obj, NULL, &exc);
1615 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1617 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1619 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1620 mono_print_thread_dump_from_ctx (ctx);
1622 jit_tls->orig_ex_ctx_set = TRUE;
1623 mono_profiler_exception_thrown (obj);
1624 jit_tls->orig_ex_ctx_set = FALSE;
1626 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1629 if (mini_get_debug_options ()->break_on_exc)
1631 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1633 if (mini_get_debug_options ()->suspend_on_unhandled) {
1634 mono_runtime_printf_err ("Unhandled exception, suspending...");
1639 // FIXME: This runs managed code so it might cause another stack overflow when
1640 // we are handling a stack overflow
1641 mono_unhandled_exception (obj);
1643 gboolean unhandled = FALSE;
1646 * The exceptions caught by the mono_runtime_invoke () calls in mono_async_invoke () needs to be treated as
1647 * unhandled (#669836).
1648 * FIXME: The check below is hackish, but its hard to distinguish these runtime invoke calls from others
1651 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1653 MonoInternalThread *thread = mono_thread_internal_current ();
1654 if (jinfo_get_method (prev_ji) == thread->async_invoke_method)
1659 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1661 mono_debugger_agent_handle_exception (obj, ctx, &ctx_cp);
1671 MonoContext new_ctx;
1673 int clause_index_start = 0;
1674 gboolean unwind_res = TRUE;
1678 ji = jit_tls->resume_state.ji;
1679 new_ctx = jit_tls->resume_state.new_ctx;
1680 clause_index_start = jit_tls->resume_state.clause_index;
1681 lmf = jit_tls->resume_state.lmf;
1682 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1683 filter_idx = jit_tls->resume_state.filter_idx;
1685 StackFrameInfo frame;
1687 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1689 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1693 g_assert (frame.type == FRAME_TYPE_MANAGED);
1699 *(mono_get_lmf_addr ()) = lmf;
1701 jit_tls->abort_func (obj);
1702 g_assert_not_reached ();
1705 method = jinfo_get_method (ji);
1707 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1709 if (stack_overflow) {
1710 if (DOES_STACK_GROWS_UP)
1711 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1713 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1715 free_stack = 0xffffff;
1718 for (i = clause_index_start; i < ji->num_clauses; i++) {
1719 MonoJitExceptionInfo *ei = &ji->clauses [i];
1720 gboolean filtered = FALSE;
1723 * During stack overflow, wait till the unwinding frees some stack
1724 * space before running handlers/finalizers.
1726 if (free_stack <= (64 * 1024))
1729 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1731 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1734 * Have to unwrap RuntimeWrappedExceptions if the
1735 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1737 if (non_exception && !wrap_non_exception_throws (method))
1738 ex_obj = non_exception;
1742 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1743 if (ji->from_llvm) {
1744 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1745 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1747 g_assert_not_reached ();
1750 /* store the exception object in bp + ei->exvar_offset */
1751 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1755 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1757 * Filter clauses should only be run in the
1758 * first pass of exception handling.
1760 filtered = (filter_idx == first_filter_idx);
1764 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1765 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1767 * This guards against the situation that we abort a thread that is executing a finally clause
1768 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1769 * check for this situation here and resume interruption if we are below the guarded block.
1771 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1772 gboolean is_outside = FALSE;
1773 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1774 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1775 //FIXME make this stack direction aware
1776 if (catch_bp > prot_bp) {
1778 } else if (catch_bp == prot_bp) {
1779 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1780 * So we check if the catch handler_start is protected by the guarded handler protected region
1783 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1784 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1785 * There aren't any further finally/fault handler blocks down the stack over this exception.
1786 * This must be ensured by the code that installs the guard trampoline.
1788 g_assert (ji == mini_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1790 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1795 jit_tls->handler_block_return_address = NULL;
1796 jit_tls->handler_block = NULL;
1797 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1801 if (mono_trace_is_enabled () && mono_trace_eval (method))
1802 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1803 jit_tls->orig_ex_ctx_set = TRUE;
1804 mono_profiler_exception_clause_handler (method, ei->flags, i);
1805 jit_tls->orig_ex_ctx_set = FALSE;
1806 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1807 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1808 *(mono_get_lmf_addr ()) = lmf;
1809 #ifndef DISABLE_PERFCOUNTERS
1810 mono_perfcounters->exceptions_depth += frame_count;
1812 if (obj == domain->stack_overflow_ex)
1813 jit_tls->handling_stack_ovf = FALSE;
1817 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1818 (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
1819 if (mono_trace_is_enabled () && mono_trace_eval (method))
1820 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1821 jit_tls->orig_ex_ctx_set = TRUE;
1822 mono_profiler_exception_clause_handler (method, ei->flags, i);
1823 jit_tls->orig_ex_ctx_set = FALSE;
1824 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1825 call_filter (ctx, ei->handler_start);
1827 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1828 (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
1829 if (mono_trace_is_enabled () && mono_trace_eval (method))
1830 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1831 jit_tls->orig_ex_ctx_set = TRUE;
1832 mono_profiler_exception_clause_handler (method, ei->flags, i);
1833 jit_tls->orig_ex_ctx_set = FALSE;
1834 mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), ex_obj);
1835 #ifndef DISABLE_PERFCOUNTERS
1836 mono_perfcounters->exceptions_finallys++;
1838 *(mono_get_lmf_addr ()) = lmf;
1839 if (ji->from_llvm) {
1841 * LLVM compiled finally handlers follow the design
1842 * of the c++ ehabi, i.e. they call a resume function
1843 * at the end instead of returning to the caller.
1844 * So save the exception handling state,
1845 * mono_resume_unwind () will call us again to continue
1848 jit_tls->resume_state.ex_obj = obj;
1849 jit_tls->resume_state.ji = ji;
1850 jit_tls->resume_state.clause_index = i + 1;
1851 jit_tls->resume_state.ctx = *ctx;
1852 jit_tls->resume_state.new_ctx = new_ctx;
1853 jit_tls->resume_state.lmf = lmf;
1854 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1855 jit_tls->resume_state.filter_idx = filter_idx;
1856 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1859 call_filter (ctx, ei->handler_start);
1865 jit_tls->orig_ex_ctx_set = TRUE;
1866 mono_profiler_exception_method_leave (method);
1867 jit_tls->orig_ex_ctx_set = FALSE;
1872 g_assert_not_reached ();
1876 * mono_debugger_handle_exception:
1878 * Notify the debugger about exceptions. Returns TRUE if the debugger wants us to stop
1879 * at the exception and FALSE to resume with the normal exception handling.
1881 * The arch code is responsible to setup @ctx in a way that MONO_CONTEXT_GET_IP () and
1882 * MONO_CONTEXT_GET_SP () point to the throw instruction; ie. before executing the
1883 * `callq throw' instruction.
1886 mono_debugger_handle_exception (MonoContext *ctx, MonoObject *obj)
1888 MonoDebuggerExceptionAction action;
1890 if (!mono_debug_using_mono_debugger ())
1894 MonoException *ex = mono_get_exception_null_reference ();
1895 MONO_OBJECT_SETREF (ex, message, mono_string_new (mono_domain_get (), "Object reference not set to an instance of an object"));
1896 obj = (MonoObject *)ex;
1899 action = _mono_debugger_throw_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1901 if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP) {
1903 * The debugger wants us to stop on the `throw' instruction.
1904 * By the time we get here, it already inserted a breakpoint there.
1907 } else if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED) {
1908 MonoContext ctx_cp = *ctx;
1909 MonoJitInfo *ji = NULL;
1913 * The debugger wants us to stop only if this exception is user-unhandled.
1916 ret = mono_handle_exception_internal_first_pass (&ctx_cp, obj, NULL, &ji, NULL, NULL);
1917 if (ret && (ji != NULL) && (jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE)) {
1919 * The exception is handled in a runtime-invoke wrapper, that means that it's unhandled
1920 * inside the method being invoked, so we handle it like a user-unhandled exception.
1927 * The exception is user-unhandled - tell the debugger to stop.
1929 return _mono_debugger_unhandled_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
1933 * The exception is catched somewhere - resume with the normal exception handling and don't
1934 * stop in the debugger.
1942 * mono_debugger_run_finally:
1943 * @start_ctx: saved processor state
1945 * This method is called by the Mono Debugger to call all `finally' clauses of the
1946 * current stack frame. It's used when the user issues a `return' command to make
1947 * the current stack frame return. After returning from this method, the debugger
1948 * unwinds the stack one frame and gives control back to the user.
1950 * NOTE: This method is only used when running inside the Mono Debugger.
1953 mono_debugger_run_finally (MonoContext *start_ctx)
1955 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1956 MonoDomain *domain = mono_domain_get ();
1957 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1958 MonoLMF *lmf = mono_get_lmf ();
1959 MonoContext ctx, new_ctx;
1960 MonoJitInfo *ji, rji;
1965 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1966 if (!ji || ji == (gpointer)-1)
1970 call_filter = mono_get_call_filter ();
1972 for (i = 0; i < ji->num_clauses; i++) {
1973 MonoJitExceptionInfo *ei = &ji->clauses [i];
1975 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1976 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1977 call_filter (&ctx, ei->handler_start);
1983 * mono_handle_exception:
1984 * @ctx: saved processor state
1985 * @obj: the exception object
1988 mono_handle_exception (MonoContext *ctx, gpointer obj)
1990 #ifndef DISABLE_PERFCOUNTERS
1991 mono_perfcounters->exceptions_thrown++;
1994 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1997 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1999 #ifndef MONO_ARCH_USE_SIGACTION
2000 #error "Can't use sigaltstack without sigaction"
2003 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
2006 mono_setup_altstack (MonoJitTlsData *tls)
2010 guint8 *staddr = NULL;
2012 if (mono_running_on_valgrind ())
2015 mono_thread_get_stack_bounds (&staddr, &stsize);
2019 tls->end_of_stack = staddr + stsize;
2020 tls->stack_size = stsize;
2022 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2024 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2025 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2027 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2029 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2030 /* mprotect can fail for the main thread stack */
2031 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);
2032 g_assert (gaddr == tls->stack_ovf_guard_base);
2033 tls->stack_ovf_valloced = TRUE;
2036 /* Setup an alternate signal stack */
2037 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
2038 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2040 g_assert (tls->signal_stack);
2042 sa.ss_sp = tls->signal_stack;
2043 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2045 g_assert (sigaltstack (&sa, NULL) == 0);
2047 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);
2051 mono_free_altstack (MonoJitTlsData *tls)
2056 sa.ss_sp = tls->signal_stack;
2057 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2058 sa.ss_flags = SS_DISABLE;
2059 err = sigaltstack (&sa, NULL);
2060 g_assert (err == 0);
2062 if (tls->signal_stack)
2063 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
2064 if (tls->stack_ovf_valloced)
2065 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
2067 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2070 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2073 mono_setup_altstack (MonoJitTlsData *tls)
2078 mono_free_altstack (MonoJitTlsData *tls)
2082 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2085 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2087 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2088 /* we need to leave some room for throwing the exception */
2089 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2090 unprotect_size -= mono_pagesize ();
2091 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2092 * is sufficient stack
2094 //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);
2096 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2097 return unprotect_size == jit_tls->stack_ovf_guard_size;
2100 static G_GNUC_UNUSED void
2101 try_more_restore (void)
2103 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2104 if (try_restore_stack_protection (jit_tls, 500))
2105 jit_tls->restore_stack_prot = NULL;
2108 static G_GNUC_UNUSED void
2109 restore_stack_protection (void)
2111 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2112 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2113 /* if we can't restore the stack protection, keep a callback installed so
2114 * we'll try to restore as much stack as we can at each return from unmanaged
2117 if (try_restore_stack_protection (jit_tls, 4096))
2118 jit_tls->restore_stack_prot = NULL;
2120 jit_tls->restore_stack_prot = try_more_restore_tramp;
2121 /* here we also throw a stack overflow exception */
2122 ex->trace_ips = NULL;
2123 ex->stack_trace = NULL;
2124 mono_raise_exception (ex);
2128 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2130 void (*func)(void) = (gpointer)tramp_data;
2136 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2138 /* we got a stack overflow in the soft-guard pages
2139 * There are two cases:
2140 * 1) managed code caused the overflow: we unprotect the soft-guard page
2141 * and let the arch-specific code trigger the exception handling mechanism
2142 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2143 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2144 * and hope we can continue with those enabled, at least until the hard-guard page
2145 * is hit. The alternative to continuing here is to just print a message and abort.
2146 * We may add in the future the code to protect the pages again in the codepath
2147 * when we return from unmanaged to managed code.
2149 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2150 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2151 /* we unprotect the minimum amount we can */
2153 gboolean handled = FALSE;
2155 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2156 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2157 guard_size -= mono_pagesize ();
2159 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2160 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2161 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);
2162 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2164 mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
2169 /* We print a message: after this even managed stack overflows
2170 * may crash the runtime
2172 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2173 if (!jit_tls->handling_stack_ovf) {
2174 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2175 jit_tls->handling_stack_ovf = 1;
2177 /*fprintf (stderr, "Already handling stack overflow\n");*/
2186 MonoMethod *omethod;
2188 } PrintOverflowUserData;
2191 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2193 MonoMethod *method = NULL;
2194 PrintOverflowUserData *user_data = data;
2198 method = jinfo_get_method (frame->ji);
2201 if (user_data->count == 0) {
2202 /* The first frame is in its prolog, so a line number cannot be computed */
2203 user_data->count ++;
2207 /* If this is a one method overflow, skip the other instances */
2208 if (method == user_data->omethod)
2211 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2212 mono_runtime_printf_err (" %s", location);
2215 if (user_data->count == 1) {
2216 mono_runtime_printf_err (" <...>");
2217 user_data->omethod = method;
2219 user_data->omethod = NULL;
2222 user_data->count ++;
2224 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2230 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2232 PrintOverflowUserData ud;
2235 /* we don't do much now, but we can warn the user with a useful message */
2236 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2238 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2239 mono_arch_sigctx_to_monoctx (ctx, &mctx);
2241 mono_runtime_printf_err ("Stacktrace:");
2243 memset (&ud, 0, sizeof (ud));
2245 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2247 if (ji && jinfo_get_method (ji))
2248 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2250 mono_runtime_printf_err ("At <unmanaged>.");
2257 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2259 MonoMethod *method = NULL;
2262 method = jinfo_get_method (frame->ji);
2265 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2266 mono_runtime_printf_err (" %s", location);
2269 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2274 static G_GNUC_UNUSED gboolean
2275 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2277 GString *p = (GString*)data;
2278 MonoMethod *method = NULL;
2281 method = jinfo_get_method (frame->ji);
2284 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2285 g_string_append_printf (p, " %s\n", location);
2288 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2293 static gboolean handling_sigsegv = FALSE;
2296 * mono_handle_native_sigsegv:
2298 * Handle a SIGSEGV received while in native code by printing diagnostic
2299 * information and aborting.
2302 mono_handle_native_sigsegv (int signal, void *ctx)
2304 #ifdef MONO_ARCH_USE_SIGACTION
2305 struct sigaction sa;
2307 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2308 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2310 if (handling_sigsegv)
2313 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2314 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2319 /* To prevent infinite loops when the stack walk causes a crash */
2320 handling_sigsegv = TRUE;
2322 /* !jit_tls means the thread was not registered with the runtime */
2323 if (jit_tls && mono_thread_internal_current ()) {
2324 mono_runtime_printf_err ("Stacktrace:\n");
2326 mono_walk_stack (print_stack_frame_to_stderr, TRUE, NULL);
2329 #ifdef HAVE_BACKTRACE_SYMBOLS
2335 mono_runtime_printf_err ("\nNative stacktrace:\n");
2337 size = backtrace (array, 256);
2338 names = backtrace_symbols (array, size);
2339 for (i =0; i < size; ++i) {
2340 mono_runtime_printf_err ("\t%s", names [i]);
2344 /* Try to get more meaningful information using gdb */
2346 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2347 if (!mini_get_debug_options ()->no_gdb_backtrace && !mono_debug_using_mono_debugger ()) {
2348 /* From g_spawn_command_line_sync () in eglib */
2351 pid_t crashed_pid = getpid ();
2355 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2356 * it will deadlock. Call the syscall directly instead.
2358 pid = mono_runtime_syscall_fork ();
2361 dup2 (STDERR_FILENO, STDOUT_FILENO);
2363 mono_gdb_render_native_backtraces (crashed_pid);
2367 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2368 waitpid (pid, &status, 0);
2375 * A SIGSEGV indicates something went very wrong so we can no longer depend
2376 * on anything working. So try to print out lots of diagnostics, starting
2377 * with ones which have a greater chance of working.
2379 mono_runtime_printf_err (
2381 "=================================================================\n"
2382 "Got a %s while executing native code. This usually indicates\n"
2383 "a fatal error in the mono runtime or one of the native libraries \n"
2384 "used by your application.\n"
2385 "=================================================================\n",
2389 #ifdef MONO_ARCH_USE_SIGACTION
2391 /* Remove our SIGABRT handler */
2392 sa.sa_handler = SIG_DFL;
2393 sigemptyset (&sa.sa_mask);
2396 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2400 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2401 #if defined (PLATFORM_ANDROID)
2409 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2411 MonoInternalThread *thread = mono_thread_internal_current ();
2412 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2415 GString* text = g_string_new (0);
2416 char *name, *wapi_desc;
2417 GError *error = NULL;
2420 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2422 g_string_append_printf (text, "\n\"%s\"", name);
2425 else if (thread->threadpool_thread)
2426 g_string_append (text, "\n\"<threadpool thread>\"");
2428 g_string_append (text, "\n\"<unnamed thread>\"");
2431 wapi_desc = wapi_current_thread_desc ();
2432 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2436 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2438 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2440 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2442 mono_arch_sigctx_to_monoctx (sigctx, &ctx);
2444 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2446 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2449 mono_runtime_printf ("%s", text->str);
2451 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2452 OutputDebugStringA(text->str);
2455 g_string_free (text, TRUE);
2456 mono_runtime_stdout_fflush ();
2460 * mono_print_thread_dump:
2462 * Print information about the current thread to stdout.
2463 * SIGCTX can be NULL, allowing this to be called from gdb.
2466 mono_print_thread_dump (void *sigctx)
2468 mono_print_thread_dump_internal (sigctx, NULL);
2472 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2474 mono_print_thread_dump_internal (NULL, ctx);
2478 * mono_resume_unwind:
2480 * This is called by a trampoline from LLVM compiled finally clauses to continue
2484 mono_resume_unwind (MonoContext *ctx)
2486 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2487 static void (*restore_context) (MonoContext *);
2488 MonoContext new_ctx;
2490 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2491 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2494 mono_handle_exception_internal (&new_ctx, jit_tls->resume_state.ex_obj, TRUE, NULL);
2496 if (!restore_context)
2497 restore_context = mono_get_restore_context ();
2499 restore_context (&new_ctx);
2502 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2507 MonoJitExceptionInfo *ei;
2508 } FindHandlerBlockData;
2511 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2515 FindHandlerBlockData *pdata = data;
2516 MonoJitInfo *ji = frame->ji;
2521 if (jinfo_get_method (ji)->wrapper_type)
2524 ip = MONO_CONTEXT_GET_IP (ctx);
2526 for (i = 0; i < ji->num_clauses; ++i) {
2527 MonoJitExceptionInfo *ei = ji->clauses + i;
2528 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2530 /*If ip points to the first instruction it means the handler block didn't start
2531 so we can leave its execution to the EH machinery*/
2532 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2544 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2547 MonoJitExceptionInfo *clause = NULL;
2550 ip = MONO_CONTEXT_GET_IP (ctx);
2552 for (i = 0; i < ji->num_clauses; ++i) {
2553 clause = &ji->clauses [i];
2554 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2556 if (clause->handler_start < ip && clause->data.handler_end > ip)
2560 /*no matching finally */
2561 if (i == ji->num_clauses)
2564 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2565 if (ip == clause->handler_start)
2568 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2572 * Finds the bottom handler block running and install a block guard if needed.
2573 * FIXME add full-aot support.
2576 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2578 FindHandlerBlockData data = { 0 };
2579 MonoJitTlsData *jit_tls = ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2586 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2587 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2589 if (!jit_tls || jit_tls->handler_block_return_address)
2592 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_SIGNAL_SAFE, &data);
2597 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2599 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2600 if (resume_ip == NULL)
2603 jit_tls->handler_block_return_address = resume_ip;
2604 jit_tls->handler_block = data.ei;
2611 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2619 mono_set_cast_details (MonoClass *from, MonoClass *to)
2621 MonoJitTlsData *jit_tls = NULL;
2623 if (mini_get_debug_options ()->better_cast_details) {
2624 jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2625 jit_tls->class_cast_from = from;
2626 jit_tls->class_cast_to = to;
2631 /*returns false if the thread is not attached*/
2633 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2635 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2636 MonoInternalThread *thread = mono_thread_internal_current ();
2637 if (!thread || !thread->jit_data) {
2643 mono_arch_sigctx_to_monoctx (sigctx, &ctx->ctx);
2645 #if MONO_ARCH_HAS_MONO_CONTEXT && !defined(MONO_CROSS_COMPILE)
2646 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2648 g_error ("Use a null sigctx requires a working mono-context");
2651 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2652 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2653 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2657 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2663 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2665 MonoInternalThread *thread = mono_thread_internal_current ();
2666 if (!thread || !thread->jit_data) {
2672 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2673 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2674 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2679 /*returns false if the thread is not attached*/
2681 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2683 MonoInternalThread *thread = mono_thread_internal_current ();
2684 MONO_ARCH_CONTEXT_DEF
2686 mono_arch_flush_register_windows ();
2688 if (!thread || !thread->jit_data) {
2692 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2693 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2695 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2698 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2699 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2700 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2706 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2708 void (*restore_context) (MonoContext *);
2709 restore_context = mono_get_restore_context ();
2711 mono_handle_exception (ctx, exc);
2712 restore_context (ctx);
2715 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2717 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2719 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2720 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2721 jit_tls->ex_ctx = *ctx;
2723 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2725 g_error ("This target doesn't support mono_arch_setup_async_callback");
2730 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2732 unhandled_exception_hook = func;
2733 unhandled_exception_hook_data = user_data;
2737 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2739 if (unhandled_exception_hook) {
2740 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2742 MonoObject *other = NULL;
2743 MonoString *str = mono_object_to_string (exc, &other);
2747 msg = mono_string_to_utf8 (str);
2749 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2750 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2752 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2753 original_backtrace, nested_backtrace);
2755 g_free (original_backtrace);
2756 g_free (nested_backtrace);
2758 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2760 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2762 #if defined(__APPLE__) && defined(__arm__)
2763 g_assertion_message ("Terminating runtime due to unhandled exception");
2765 exit (mono_environment_exitcode_get ());
2769 g_assert_not_reached ();