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fix GC safety bugs in compile.cpp

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This commit is contained in:
Joel Dice 2008-01-01 18:07:12 -07:00
parent 4378110506
commit 1d7931a654
1 changed files with 20 additions and 13 deletions

33
src/compile.cpp

@ -3768,7 +3768,7 @@ visitStack(MyThread* t, Heap::Visitor* v)
void* ip = t->ip;
void* base = t->base;
void** stack = static_cast<void**>(t->stack);
if (ip == 0) {
if (ip == 0 and stack) {
ip = *stack;
}
@ -3791,11 +3791,16 @@ visitStack(MyThread* t, Heap::Visitor* v)
visitStackAndLocals(t, v, base, node);
stack = static_cast<void**>(base) + 1;
ip = *stack;
if (stack) {
ip = *stack;
}
base = *static_cast<void**>(base);
} else if (trace) {
base = trace->base;
stack = static_cast<void**>(trace->stack);
if (stack) {
ip = *stack;
}
trace = trace->next;
} else {
break;
@ -4015,19 +4020,20 @@ class SegFaultHandler: public System::SignalHandler {
void** thread)
{
MyThread* t = static_cast<MyThread*>(m->localThread->get());
object node = findTraceNode(t, *ip);
if (node) {
t->ip = *ip;
t->base = *base;
t->stack = *stack;
t->exception = makeNullPointerException(t);
if (t->state == Thread::ActiveState) {
object node = findTraceNode(t, *ip);
if (node) {
t->ip = *ip;
t->base = *base;
t->stack = *stack;
t->exception = makeNullPointerException(t);
findUnwindTarget(t, ip, base, stack);
*thread = t;
return true;
} else {
return false;
findUnwindTarget(t, ip, base, stack);
*thread = t;
return true;
}
}
return false;
}
Machine* m;
@ -4409,6 +4415,7 @@ resizeTable(MyThread* t, object oldTable, unsigned newLength)
PROTECT(t, oldNode);
object newTable = makeArray(t, newLength, true);
PROTECT(t, newTable);
for (unsigned i = 0; i < arrayLength(t, oldTable); ++i) {
for (oldNode = arrayBody(t, oldTable, i);