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Allow target application to handle continuable exception #232

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Allow target application to handle continuable exception #232

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26 changes: 15 additions & 11 deletions winafl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -209,19 +209,23 @@ dump_winafl_data()

static bool
onexception(void *drcontext, dr_exception_t *excpt) {
DWORD exception_code = excpt->record->ExceptionCode;
EXCEPTION_RECORD *ex_rec = excpt->record;
DWORD exception_code = ex_rec->ExceptionCode;
DWORD exception_flags = ex_rec->ExceptionFlags;
PVOID exception_address = ex_rec->ExceptionAddress;

if(options.debug_mode)
dr_fprintf(winafl_data.log, "Exception caught: %x\n", exception_code);

if((exception_code == EXCEPTION_ACCESS_VIOLATION) ||
(exception_code == EXCEPTION_ILLEGAL_INSTRUCTION) ||
(exception_code == EXCEPTION_PRIV_INSTRUCTION) ||
(exception_code == EXCEPTION_INT_DIVIDE_BY_ZERO) ||
(exception_code == STATUS_HEAP_CORRUPTION) ||
(exception_code == EXCEPTION_STACK_OVERFLOW) ||
(exception_code == STATUS_STACK_BUFFER_OVERRUN) ||
(exception_code == STATUS_FATAL_APP_EXIT)) {
dr_fprintf(winafl_data.log, "Exception caught. Code: %x, address: %x\n", exception_code, exception_address);

if(exception_flags & EXCEPTION_NONCONTINUABLE &&
((exception_code == EXCEPTION_ACCESS_VIOLATION) ||
(exception_code == EXCEPTION_ILLEGAL_INSTRUCTION) ||
(exception_code == EXCEPTION_PRIV_INSTRUCTION) ||
(exception_code == EXCEPTION_INT_DIVIDE_BY_ZERO) ||
(exception_code == STATUS_HEAP_CORRUPTION) ||
(exception_code == EXCEPTION_STACK_OVERFLOW) ||
(exception_code == STATUS_STACK_BUFFER_OVERRUN) ||
(exception_code == STATUS_FATAL_APP_EXIT))) {
if(options.debug_mode) {
dr_fprintf(winafl_data.log, "crashed\n");
} else {
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