5 bool factor_vm::fatal_erroring_p;
7 static inline void fa_diddly_atal_error() {
8 printf("fatal_error in fatal_error!\n");
13 void fatal_error(const char* msg, cell tagged) {
14 if (factor_vm::fatal_erroring_p)
15 fa_diddly_atal_error();
17 factor_vm::fatal_erroring_p = true;
19 std::cout << "fatal_error: " << msg;
20 std::cout << ": " << (void*)tagged;
21 std::cout << std::endl;
25 void critical_error(const char* msg, cell tagged) {
26 std::cout << "You have triggered a bug in Factor. Please report.\n";
27 std::cout << "critical_error: " << msg;
28 std::cout << ": " << std::hex << tagged << std::dec;
29 std::cout << std::endl;
30 current_vm()->factorbug();
33 void out_of_memory() {
34 std::cout << "Out of memory\n\n";
35 current_vm()->dump_generations();
39 /* Allocates memory */
40 void factor_vm::general_error(vm_error_type error, cell arg1_, cell arg2_) {
42 /* If we got here from memory_protection_error(), then the stack
43 pointer has been fiddled with and the elements of these vectors,
44 which address stack-allocated objects, are bogus and needs to be
50 data_root<object> arg1(arg1_, this);
51 data_root<object> arg2(arg2_, this);
55 /* If we had an underflow or overflow, data or retain stack
56 pointers might be out of bounds, so fix them before allocating
60 /* If error was thrown during heap scan, we re-enable the GC */
63 /* If the error handler is set, we rewind any C stack frames and
64 pass the error to user-space. */
65 if (!current_gc && to_boolean(special_objects[ERROR_HANDLER_QUOT])) {
67 /* Doing a GC here triggers all kinds of funny errors */
68 primitive_compact_gc();
71 /* Now its safe to allocate and GC */
73 allot_array_4(special_objects[OBJ_ERROR], tag_fixnum(error),
74 arg1.value(), arg2.value());
75 ctx->push(error_object);
77 /* Clear the data roots again since arg1 and arg2's destructors
81 /* The unwind-native-frames subprimitive will clear faulting_p
82 if it was successfully reached. */
83 unwind_native_frames(special_objects[ERROR_HANDLER_QUOT],
85 } /* Error was thrown in early startup before error handler is set, so just
88 std::cout << "You have triggered a bug in Factor. Please report.\n";
89 std::cout << "error: " << error << std::endl;
90 std::cout << "arg 1: ";
91 print_obj(arg1.value());
92 std::cout << std::endl;
93 std::cout << "arg 2: ";
94 print_obj(arg2.value());
95 std::cout << std::endl;
101 void factor_vm::type_error(cell type, cell tagged) {
102 general_error(ERROR_TYPE, tag_fixnum(type), tagged);
105 void factor_vm::not_implemented_error() {
106 general_error(ERROR_NOT_IMPLEMENTED, false_object, false_object);
109 void factor_vm::verify_memory_protection_error(cell addr) {
110 /* Called from the OS-specific top halves of the signal handlers to
111 make sure it's safe to dispatch to memory_protection_error */
112 if (fatal_erroring_p)
113 fa_diddly_atal_error();
114 if (faulting_p && !code->safepoint_p(addr))
115 fatal_error("Double fault", addr);
117 fatal_error("Memory protection fault during low-level debugger", addr);
118 else if (atomic::load(¤t_gc_p))
119 fatal_error("Memory protection fault during gc", addr);
122 /* Allocates memory */
123 void factor_vm::memory_protection_error(cell pc, cell addr) {
124 if (code->safepoint_p(addr))
125 safepoint.handle_safepoint(this, pc);
126 else if (ctx->datastack_seg->underflow_p(addr))
127 general_error(ERROR_DATASTACK_UNDERFLOW, false_object, false_object);
128 else if (ctx->datastack_seg->overflow_p(addr))
129 general_error(ERROR_DATASTACK_OVERFLOW, false_object, false_object);
130 else if (ctx->retainstack_seg->underflow_p(addr))
131 general_error(ERROR_RETAINSTACK_UNDERFLOW, false_object, false_object);
132 else if (ctx->retainstack_seg->overflow_p(addr))
133 general_error(ERROR_RETAINSTACK_OVERFLOW, false_object, false_object);
134 else if (ctx->callstack_seg->underflow_p(addr))
135 general_error(ERROR_CALLSTACK_OVERFLOW, false_object, false_object);
136 else if (ctx->callstack_seg->overflow_p(addr))
137 general_error(ERROR_CALLSTACK_UNDERFLOW, false_object, false_object);
139 general_error(ERROR_MEMORY, from_unsigned_cell(addr), false_object);
142 /* Allocates memory */
143 void factor_vm::signal_error(cell signal) {
144 general_error(ERROR_SIGNAL, from_unsigned_cell(signal), false_object);
147 void factor_vm::divide_by_zero_error() {
148 general_error(ERROR_DIVIDE_BY_ZERO, false_object, false_object);
151 void factor_vm::fp_trap_error(unsigned int fpu_status) {
152 general_error(ERROR_FP_TRAP, tag_fixnum(fpu_status), false_object);
155 /* For testing purposes */
156 void factor_vm::primitive_unimplemented() { not_implemented_error(); }
158 void factor_vm::memory_signal_handler_impl() {
159 memory_protection_error(signal_fault_pc, signal_fault_addr);
160 if (!signal_resumable) {
161 /* In theory we should only get here if the callstack overflowed during a
163 general_error(ERROR_CALLSTACK_OVERFLOW, false_object, false_object);
167 void memory_signal_handler_impl() {
168 current_vm()->memory_signal_handler_impl();
171 void factor_vm::synchronous_signal_handler_impl() {
172 signal_error(signal_number);
175 void synchronous_signal_handler_impl() {
176 current_vm()->synchronous_signal_handler_impl();
179 void factor_vm::fp_signal_handler_impl() {
180 /* Clear pending exceptions to avoid getting stuck in a loop */
181 set_fpu_state(get_fpu_state());
183 fp_trap_error(signal_fpu_status);
186 void fp_signal_handler_impl() { current_vm()->fp_signal_handler_impl(); }