factor/vm/errors.cpp

198 lines
5.1 KiB
C++
Executable File

#include "master.hpp"
namespace factor
{
bool factor_vm::fatal_erroring_p;
static inline void fa_diddly_atal_error()
{
printf("fatal_error in fatal_error!\n");
breakpoint();
::_exit(86);
}
void fatal_error(const char *msg, cell tagged)
{
if (factor_vm::fatal_erroring_p)
fa_diddly_atal_error();
factor_vm::fatal_erroring_p = true;
std::cout << "fatal_error: " << msg;
std::cout << ": " << (void*)tagged;
std::cout << std::endl;
abort();
}
void critical_error(const char *msg, cell tagged)
{
std::cout << "You have triggered a bug in Factor. Please report.\n";
std::cout << "critical_error: " << msg;
std::cout << ": " << std::hex << tagged << std::dec;
std::cout << std::endl;
current_vm()->factorbug();
}
void out_of_memory()
{
std::cout << "Out of memory\n\n";
current_vm()->dump_generations();
abort();
}
void factor_vm::general_error(vm_error_type error, cell arg1, cell arg2)
{
faulting_p = true;
/* Reset local roots before allocating anything */
data_roots.clear();
bignum_roots.clear();
code_roots.clear();
/* If we had an underflow or overflow, data or retain stack
pointers might be out of bounds, so fix them before allocating
anything */
ctx->fix_stacks();
/* If error was thrown during heap scan, we re-enable the GC */
gc_off = false;
/* If the error handler is set, we rewind any C stack frames and
pass the error to user-space. */
if(!current_gc && to_boolean(special_objects[ERROR_HANDLER_QUOT]))
{
#ifdef FACTOR_DEBUG
/* Doing a GC here triggers all kinds of funny errors */
primitive_compact_gc();
#endif
/* Now its safe to allocate and GC */
cell error_object = allot_array_4(special_objects[OBJ_ERROR],
tag_fixnum(error),arg1,arg2);
ctx->push(error_object);
/* The unwind-native-frames subprimitive will clear faulting_p
if it was successfully reached. */
unwind_native_frames(special_objects[ERROR_HANDLER_QUOT],
ctx->callstack_top);
}
/* Error was thrown in early startup before error handler is set, so just
crash. */
else
{
std::cout << "You have triggered a bug in Factor. Please report.\n";
std::cout << "error: " << error << std::endl;
std::cout << "arg 1: "; print_obj(arg1); std::cout << std::endl;
std::cout << "arg 2: "; print_obj(arg2); std::cout << std::endl;
factorbug();
abort();
}
}
void factor_vm::type_error(cell type, cell tagged)
{
general_error(ERROR_TYPE,tag_fixnum(type),tagged);
}
void factor_vm::not_implemented_error()
{
general_error(ERROR_NOT_IMPLEMENTED,false_object,false_object);
}
void factor_vm::verify_memory_protection_error(cell addr)
{
/* Called from the OS-specific top halves of the signal handlers to
make sure it's safe to dispatch to memory_protection_error */
if(fatal_erroring_p)
fa_diddly_atal_error();
if(faulting_p && !code->safepoint_p(addr))
fatal_error("Double fault", addr);
else if(fep_p)
fatal_error("Memory protection fault during low-level debugger", addr);
else if(atomic::load(&current_gc_p))
fatal_error("Memory protection fault during gc", addr);
}
void factor_vm::memory_protection_error(cell pc, cell addr)
{
if(code->safepoint_p(addr))
safepoint.handle_safepoint(this, pc);
else if(ctx->datastack_seg->underflow_p(addr))
general_error(ERROR_DATASTACK_UNDERFLOW,false_object,false_object);
else if(ctx->datastack_seg->overflow_p(addr))
general_error(ERROR_DATASTACK_OVERFLOW,false_object,false_object);
else if(ctx->retainstack_seg->underflow_p(addr))
general_error(ERROR_RETAINSTACK_UNDERFLOW,false_object,false_object);
else if(ctx->retainstack_seg->overflow_p(addr))
general_error(ERROR_RETAINSTACK_OVERFLOW,false_object,false_object);
else if(ctx->callstack_seg->underflow_p(addr))
general_error(ERROR_CALLSTACK_OVERFLOW,false_object,false_object);
else if(ctx->callstack_seg->overflow_p(addr))
general_error(ERROR_CALLSTACK_UNDERFLOW,false_object,false_object);
else
general_error(ERROR_MEMORY,from_unsigned_cell(addr),false_object);
}
void factor_vm::signal_error(cell signal)
{
general_error(ERROR_SIGNAL,from_unsigned_cell(signal),false_object);
}
void factor_vm::divide_by_zero_error()
{
general_error(ERROR_DIVIDE_BY_ZERO,false_object,false_object);
}
void factor_vm::fp_trap_error(unsigned int fpu_status)
{
general_error(ERROR_FP_TRAP,tag_fixnum(fpu_status),false_object);
}
/* For testing purposes */
void factor_vm::primitive_unimplemented()
{
not_implemented_error();
}
void factor_vm::memory_signal_handler_impl()
{
memory_protection_error(signal_fault_pc, signal_fault_addr);
if (!signal_resumable)
{
/* In theory we should only get here if the callstack overflowed during a
safepoint */
general_error(ERROR_CALLSTACK_OVERFLOW,false_object,false_object);
}
}
void memory_signal_handler_impl()
{
current_vm()->memory_signal_handler_impl();
}
void factor_vm::synchronous_signal_handler_impl()
{
signal_error(signal_number);
}
void synchronous_signal_handler_impl()
{
current_vm()->synchronous_signal_handler_impl();
}
void factor_vm::fp_signal_handler_impl()
{
/* Clear pending exceptions to avoid getting stuck in a loop */
set_fpu_state(get_fpu_state());
fp_trap_error(signal_fpu_status);
}
void fp_signal_handler_impl()
{
current_vm()->fp_signal_handler_impl();
}
}