923 lines
28 KiB
C++
923 lines
28 KiB
C++
#include "check-structures-sanity.h"
|
|
|
|
#include "df/large_integer.h"
|
|
|
|
Checker::Checker(color_ostream & out) :
|
|
out(out),
|
|
checked_count(0),
|
|
error_count(0),
|
|
maxerrors(~size_t(0)),
|
|
maxerrors_reported(false),
|
|
enums(false),
|
|
sizes(false),
|
|
unnamed(false),
|
|
failfast(false),
|
|
noprogress(!out.is_console()),
|
|
maybepointer(false)
|
|
{
|
|
Core::getInstance().p->getMemRanges(mapped);
|
|
}
|
|
|
|
color_ostream & Checker::fail(int line, const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
error_count++;
|
|
out << COLOR_LIGHTRED << "sanity check failed (line " << line << "): ";
|
|
out << COLOR_RESET << (cs.identity ? cs.identity->getFullName() : "?");
|
|
out << " (accessed as " << item.path << "): ";
|
|
out << COLOR_YELLOW;
|
|
if (maxerrors && maxerrors != ~size_t(0))
|
|
maxerrors--;
|
|
return out;
|
|
}
|
|
|
|
bool Checker::queue_item(const QueueItem & item, CheckedStructure cs)
|
|
{
|
|
if (!cs.identity)
|
|
{
|
|
UNEXPECTED;
|
|
return false;
|
|
}
|
|
|
|
if (cs.identity->type() == IDTYPE_CLASS)
|
|
{
|
|
if (cs.count)
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
|
|
if (get_vtable_name(item, cs, true))
|
|
{
|
|
auto actual_identity = virtual_identity::get(reinterpret_cast<virtual_ptr>(const_cast<void *>(item.ptr)));
|
|
if (static_cast<virtual_identity *>(cs.identity)->is_subclass(actual_identity))
|
|
{
|
|
cs.identity = actual_identity;
|
|
}
|
|
}
|
|
}
|
|
|
|
auto ptr_end = PTR_ADD(item.ptr, cs.full_size());
|
|
|
|
auto prev = data.lower_bound(item.ptr);
|
|
if (prev != data.cbegin() && uintptr_t(prev->first) > uintptr_t(item.ptr))
|
|
{
|
|
prev--;
|
|
}
|
|
if (prev != data.cend() && uintptr_t(prev->first) <= uintptr_t(item.ptr) && uintptr_t(prev->first) + prev->second.second.full_size() > uintptr_t(item.ptr))
|
|
{
|
|
auto offset = uintptr_t(item.ptr) - uintptr_t(prev->first);
|
|
if (!prev->second.second.has_type_at_offset(cs, offset))
|
|
{
|
|
if (offset == 0 && cs.identity == df::identity_traits<void *>::get())
|
|
{
|
|
FAIL("unknown pointer is " << prev->second.second.identity->getFullName() << ", previously seen at " << prev->second.first);
|
|
return false;
|
|
}
|
|
// TODO
|
|
FAIL("TODO: handle merging structures: " << item.path << " overlaps " << prev->second.first << " (backward)");
|
|
return false;
|
|
}
|
|
|
|
// we've already checked this structure, or we're currently queued to do so
|
|
return false;
|
|
}
|
|
|
|
auto overlap_start = data.lower_bound(item.ptr);
|
|
auto overlap_end = data.lower_bound(ptr_end);
|
|
for (auto overlap = overlap_start; overlap != overlap_end; overlap++)
|
|
{
|
|
auto offset = uintptr_t(overlap->first) - uintptr_t(item.ptr);
|
|
if (!cs.has_type_at_offset(overlap->second.second, offset))
|
|
{
|
|
// TODO
|
|
FAIL("TODO: handle merging structures: " << overlap->second.first << " overlaps " << item.path << " (forward)");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
data.erase(overlap_start, overlap_end);
|
|
|
|
data[item.ptr] = std::make_pair(item.path, cs);
|
|
queue.push_back(item);
|
|
return true;
|
|
}
|
|
|
|
void Checker::queue_globals()
|
|
{
|
|
auto fields = df::global::_identity.getFields();
|
|
for (auto field = fields; field->mode != struct_field_info::END; field++)
|
|
{
|
|
if (!field->offset)
|
|
{
|
|
UNEXPECTED;
|
|
continue;
|
|
}
|
|
|
|
// offset is the position of the DFHack pointer to this global.
|
|
auto ptr = *reinterpret_cast<const void **>(field->offset);
|
|
|
|
QueueItem item(stl_sprintf("df.global.%s", field->name), ptr);
|
|
CheckedStructure cs(field);
|
|
|
|
if (!ptr)
|
|
{
|
|
FAIL("unknown global address");
|
|
continue;
|
|
}
|
|
|
|
if (!strcmp(field->name, "enabler"))
|
|
{
|
|
// don't care about libgraphics as we have the source code
|
|
continue;
|
|
}
|
|
|
|
queue_item(item, cs);
|
|
}
|
|
}
|
|
|
|
bool Checker::process_queue()
|
|
{
|
|
if (queue.empty())
|
|
{
|
|
return false;
|
|
}
|
|
|
|
auto item = std::move(queue.front());
|
|
queue.pop_front();
|
|
|
|
auto cs = data.find(item.ptr);
|
|
if (cs == data.end())
|
|
{
|
|
// happens if pointer is determined to be part of a larger structure
|
|
return true;
|
|
}
|
|
|
|
dispatch_item(item, cs->second.second);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
void Checker::dispatch_item(const QueueItem & base, const CheckedStructure & cs)
|
|
{
|
|
if (!is_valid_dereference(base, cs))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (!cs.count)
|
|
{
|
|
dispatch_single_item(base, cs);
|
|
return;
|
|
}
|
|
|
|
if (sizes && !cs.inside_structure)
|
|
{
|
|
if (auto allocated_size = get_allocated_size(base))
|
|
{
|
|
auto expected_size = cs.identity->byte_size();
|
|
if (cs.allocated_count)
|
|
expected_size *= cs.allocated_count;
|
|
else if (cs.count)
|
|
expected_size *= cs.count;
|
|
|
|
if (cs.identity->type() == IDTYPE_CLASS && get_vtable_name(base, cs, true))
|
|
{
|
|
if (cs.count)
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
|
|
auto virtual_type = virtual_identity::get(static_cast<virtual_ptr>(const_cast<void *>(base.ptr)));
|
|
expected_size = virtual_type->byte_size();
|
|
}
|
|
|
|
auto & item = base;
|
|
|
|
if (allocated_size > expected_size)
|
|
{
|
|
FAIL("identified structure is too small (expected " << expected_size << " bytes, but there are " << allocated_size << " bytes allocated)");
|
|
}
|
|
else if (allocated_size < expected_size)
|
|
{
|
|
FAIL("identified structure is too big (expected " << expected_size << " bytes, but there are " << allocated_size << " bytes allocated)");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
|
|
auto ptr = base.ptr;
|
|
auto size = cs.identity->byte_size();
|
|
for (size_t i = 0; i < cs.count; i++)
|
|
{
|
|
QueueItem item(base, i, ptr);
|
|
dispatch_single_item(item, cs);
|
|
ptr = PTR_ADD(ptr, size);
|
|
}
|
|
}
|
|
|
|
void Checker::dispatch_single_item(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
checked_count++;
|
|
|
|
if (!maxerrors)
|
|
{
|
|
if (!maxerrors_reported)
|
|
{
|
|
FAIL("error limit reached. bailing out with " << (queue.size() + 1) << " items remaining in the queue.");
|
|
maxerrors_reported = true;
|
|
}
|
|
queue.clear();
|
|
return;
|
|
}
|
|
|
|
switch (cs.identity->type())
|
|
{
|
|
case IDTYPE_GLOBAL:
|
|
case IDTYPE_FUNCTION:
|
|
UNEXPECTED;
|
|
break;
|
|
case IDTYPE_PRIMITIVE:
|
|
dispatch_primitive(item, cs);
|
|
break;
|
|
case IDTYPE_POINTER:
|
|
dispatch_pointer(item, cs);
|
|
break;
|
|
case IDTYPE_CONTAINER:
|
|
dispatch_container(item, cs);
|
|
break;
|
|
case IDTYPE_PTR_CONTAINER:
|
|
dispatch_ptr_container(item, cs);
|
|
break;
|
|
case IDTYPE_BIT_CONTAINER:
|
|
dispatch_bit_container(item, cs);
|
|
break;
|
|
case IDTYPE_BITFIELD:
|
|
dispatch_bitfield(item, cs);
|
|
break;
|
|
case IDTYPE_ENUM:
|
|
dispatch_enum(item, cs);
|
|
break;
|
|
case IDTYPE_STRUCT:
|
|
dispatch_struct(item, cs);
|
|
break;
|
|
case IDTYPE_CLASS:
|
|
dispatch_class(item, cs);
|
|
break;
|
|
case IDTYPE_BUFFER:
|
|
dispatch_buffer(item, cs);
|
|
break;
|
|
case IDTYPE_STL_PTR_VECTOR:
|
|
dispatch_stl_ptr_vector(item, cs);
|
|
break;
|
|
case IDTYPE_OPAQUE:
|
|
break;
|
|
case IDTYPE_UNION:
|
|
dispatch_untagged_union(item, cs);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Checker::dispatch_primitive(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
if (cs.identity == df::identity_traits<std::string>::get())
|
|
{
|
|
check_stl_string(item);
|
|
}
|
|
else if (cs.identity == df::identity_traits<char *>::get())
|
|
{
|
|
// TODO check c strings
|
|
UNEXPECTED;
|
|
}
|
|
else if (cs.identity == df::identity_traits<bool>::get())
|
|
{
|
|
auto val = *reinterpret_cast<const uint8_t *>(item.ptr);
|
|
if (val > 1 && val != 0xd2)
|
|
{
|
|
FAIL("invalid value for bool: " << int(val));
|
|
}
|
|
}
|
|
else if (auto int_id = dynamic_cast<df::integer_identity_base *>(cs.identity))
|
|
{
|
|
check_possible_pointer(item, cs);
|
|
|
|
// TODO check ints?
|
|
}
|
|
else if (auto float_id = dynamic_cast<df::float_identity_base *>(cs.identity))
|
|
{
|
|
// TODO check floats?
|
|
}
|
|
else
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
void Checker::dispatch_pointer(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto target_ptr = validate_and_dereference<const void *>(item);
|
|
if (!target_ptr)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#ifdef DFHACK64
|
|
if (uintptr_t(target_ptr) == 0xd2d2d2d2d2d2d2d2)
|
|
#else
|
|
if (uintptr_t(target_ptr) == 0xd2d2d2d2)
|
|
#endif
|
|
{
|
|
return;
|
|
}
|
|
|
|
QueueItem target_item(item.path, target_ptr);
|
|
auto target = static_cast<pointer_identity *>(cs.identity)->getTarget();
|
|
if (!target)
|
|
{
|
|
check_unknown_pointer(target_item);
|
|
return;
|
|
}
|
|
|
|
CheckedStructure target_cs(target);
|
|
|
|
// 256 is an arbitrarily chosen size threshold
|
|
if (cs.count || target->byte_size() <= 256)
|
|
{
|
|
// target is small, or we are inside an array of pointers; handle now
|
|
if (queue_item(target_item, target_cs))
|
|
{
|
|
// we insert it into the queue to make sure we're not stuck in a loop
|
|
// get it back out of the queue to prevent the queue growing too big
|
|
queue.pop_back();
|
|
dispatch_item(target_item, target_cs);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// target is large and not part of an array; handle later
|
|
queue_item(target_item, target_cs);
|
|
}
|
|
}
|
|
void Checker::dispatch_container(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<container_identity *>(cs.identity);
|
|
auto base_container = identity->getFullName(nullptr);
|
|
if (base_container == "vector<void>")
|
|
{
|
|
check_stl_vector(item, identity->getItemType(), identity->getIndexEnumType());
|
|
}
|
|
else if (base_container == "deque<void>")
|
|
{
|
|
// TODO: check deque?
|
|
}
|
|
else if (base_container == "DfArray<void>")
|
|
{
|
|
// TODO: check DfArray
|
|
}
|
|
else
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
void Checker::dispatch_ptr_container(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<container_identity *>(cs.identity);
|
|
auto base_container = identity->getFullName(nullptr);
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
void Checker::dispatch_bit_container(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<container_identity *>(cs.identity);
|
|
auto base_container = identity->getFullName(nullptr);
|
|
if (base_container == "BitArray<>")
|
|
{
|
|
// TODO: check DF bit array
|
|
}
|
|
else if (base_container == "vector<bool>")
|
|
{
|
|
// TODO: check stl bit vector
|
|
}
|
|
else
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
void Checker::dispatch_bitfield(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
check_possible_pointer(item, cs);
|
|
|
|
if (!enums)
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto bitfield_type = static_cast<bitfield_identity *>(cs.identity);
|
|
uint64_t bitfield_value;
|
|
switch (bitfield_type->byte_size())
|
|
{
|
|
case 1:
|
|
bitfield_value = validate_and_dereference<uint8_t>(item);
|
|
// don't check for uninitialized; too small to be sure
|
|
break;
|
|
case 2:
|
|
bitfield_value = validate_and_dereference<uint16_t>(item);
|
|
if (bitfield_value == 0xd2d2)
|
|
{
|
|
bitfield_value = 0;
|
|
}
|
|
break;
|
|
case 4:
|
|
bitfield_value = validate_and_dereference<uint32_t>(item);
|
|
if (bitfield_value == 0xd2d2d2d2)
|
|
{
|
|
bitfield_value = 0;
|
|
}
|
|
break;
|
|
case 8:
|
|
bitfield_value = validate_and_dereference<uint64_t>(item);
|
|
if (bitfield_value == 0xd2d2d2d2d2d2d2d2)
|
|
{
|
|
bitfield_value = 0;
|
|
}
|
|
break;
|
|
default:
|
|
UNEXPECTED;
|
|
bitfield_value = 0;
|
|
break;
|
|
}
|
|
|
|
auto num_bits = bitfield_type->getNumBits();
|
|
auto bits = bitfield_type->getBits();
|
|
for (int i = 0; i < 64; i++)
|
|
{
|
|
if (!(num_bits & 1))
|
|
{
|
|
bitfield_value >>= 1;
|
|
continue;
|
|
}
|
|
|
|
bitfield_value >>= 1;
|
|
|
|
if (i >= num_bits || !bits[i].size)
|
|
{
|
|
FAIL("bitfield bit " << i << " is out of range");
|
|
}
|
|
else if (unnamed && bits[i].size > 0 && !bits[i].name)
|
|
{
|
|
FAIL("bitfield bit " << i << " is unnamed");
|
|
}
|
|
else if (unnamed && !bits[i + bits[i].size].name)
|
|
{
|
|
FAIL("bitfield bit " << i << " (part of a field starting at bit " << (i + bits[i].size) << ") is unnamed");
|
|
}
|
|
}
|
|
}
|
|
void Checker::dispatch_enum(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
check_possible_pointer(item, cs);
|
|
|
|
if (!enums)
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto enum_type = static_cast<enum_identity *>(cs.identity);
|
|
auto enum_value = get_int_value(item, enum_type->getBaseType());
|
|
if (enum_type->byte_size() == 2 && uint16_t(enum_value) == 0xd2d2)
|
|
{
|
|
return;
|
|
}
|
|
else if (enum_type->byte_size() == 4 && uint32_t(enum_value) == 0xd2d2d2d2)
|
|
{
|
|
return;
|
|
}
|
|
else if (enum_type->byte_size() == 8 && uint64_t(enum_value) == 0xd2d2d2d2d2d2d2d2)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (is_in_global(item) && enum_value == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto enum_name = get_enum_item_key(enum_type, enum_value);
|
|
if (!enum_name)
|
|
{
|
|
FAIL("enum value (" << enum_value << ") is out of range");
|
|
return;
|
|
}
|
|
if (unnamed && !*enum_name)
|
|
{
|
|
FAIL("enum value (" << enum_value << ") is unnamed");
|
|
}
|
|
}
|
|
void Checker::dispatch_struct(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<struct_identity *>(cs.identity);
|
|
for (auto p = identity; p; p = p->getParent())
|
|
{
|
|
auto fields = p->getFields();
|
|
if (!fields)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
for (auto field = fields; field->mode != struct_field_info::END; field++)
|
|
{
|
|
dispatch_field(item, cs, identity, field);
|
|
}
|
|
}
|
|
}
|
|
void Checker::dispatch_field(const QueueItem & item, const CheckedStructure & cs, struct_identity *identity, const struct_field_info *field)
|
|
{
|
|
if (field->mode == struct_field_info::OBJ_METHOD ||
|
|
field->mode == struct_field_info::CLASS_METHOD)
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto field_ptr = PTR_ADD(item.ptr, field->offset);
|
|
QueueItem field_item(item, field->name, field_ptr);
|
|
CheckedStructure field_cs(field);
|
|
|
|
auto tag_field = find_union_tag(identity, field);
|
|
if (tag_field)
|
|
{
|
|
auto tag_ptr = PTR_ADD(item.ptr, tag_field->offset);
|
|
QueueItem tag_item(item, tag_field->name, tag_ptr);
|
|
CheckedStructure tag_cs(tag_field);
|
|
auto attr_name = field->extra ? field->extra->union_tag_attr : nullptr;
|
|
if (tag_cs.identity->isContainer())
|
|
{
|
|
dispatch_tagged_union_vector(field_item, tag_item, field_cs, tag_cs, attr_name);
|
|
}
|
|
else
|
|
{
|
|
dispatch_tagged_union(field_item, tag_item, field_cs, tag_cs, attr_name);
|
|
}
|
|
return;
|
|
}
|
|
|
|
dispatch_item(field_item, field_cs);
|
|
}
|
|
void Checker::dispatch_class(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto vtable_name = get_vtable_name(item, cs);
|
|
if (!vtable_name)
|
|
{
|
|
// bail out now because virtual_identity::get will crash
|
|
return;
|
|
}
|
|
|
|
auto base_identity = static_cast<virtual_identity *>(cs.identity);
|
|
auto vptr = static_cast<virtual_ptr>(const_cast<void *>(item.ptr));
|
|
auto identity = virtual_identity::get(vptr);
|
|
if (!identity)
|
|
{
|
|
FAIL("unidentified subclass of " << base_identity->getFullName() << ": " << vtable_name);
|
|
return;
|
|
}
|
|
if (base_identity != identity && !base_identity->is_subclass(identity))
|
|
{
|
|
FAIL("expected subclass of " << base_identity->getFullName() << ", but got " << identity->getFullName());
|
|
return;
|
|
}
|
|
|
|
if (data.count(item.ptr) && data.at(item.ptr).first == item.path)
|
|
{
|
|
// TODO: handle cases where this may overlap later data
|
|
data.at(item.ptr).second.identity = identity;
|
|
}
|
|
|
|
dispatch_struct(QueueItem(item.path + "<" + identity->getFullName() + ">", item.ptr), CheckedStructure(identity));
|
|
}
|
|
void Checker::dispatch_buffer(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<container_identity *>(cs.identity);
|
|
|
|
auto item_identity = identity->getItemType();
|
|
dispatch_item(item, CheckedStructure(item_identity, identity->byte_size() / item_identity->byte_size(), static_cast<enum_identity *>(identity->getIndexEnumType()), true));
|
|
}
|
|
void Checker::dispatch_stl_ptr_vector(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
auto identity = static_cast<container_identity *>(cs.identity);
|
|
auto ptr_type = wrap_in_pointer(identity->getItemType());
|
|
check_stl_vector(item, ptr_type, identity->getIndexEnumType());
|
|
}
|
|
void Checker::dispatch_tagged_union(const QueueItem & item, const QueueItem & tag_item, const CheckedStructure & cs, const CheckedStructure & tag_cs, const char *attr_name)
|
|
{
|
|
if (tag_cs.identity->type() != IDTYPE_ENUM || cs.identity->type() != IDTYPE_UNION)
|
|
{
|
|
UNEXPECTED;
|
|
return;
|
|
}
|
|
|
|
auto union_type = static_cast<union_identity *>(cs.identity);
|
|
auto union_data_ptr = reinterpret_cast<const uint8_t *>(item.ptr);
|
|
uint8_t padding_byte = *union_data_ptr;
|
|
bool all_padding = false;
|
|
if (padding_byte == 0x00 || padding_byte == 0xd2 || padding_byte == 0xff)
|
|
{
|
|
all_padding = true;
|
|
for (size_t i = 0; i < union_type->byte_size(); i++)
|
|
{
|
|
if (union_data_ptr[i] != padding_byte)
|
|
{
|
|
all_padding = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
auto tag_identity = static_cast<enum_identity *>(tag_cs.identity);
|
|
auto tag_value = get_int_value(tag_item, tag_identity->getBaseType());
|
|
if (all_padding && padding_byte == 0xd2)
|
|
{
|
|
// special case: completely uninitialized
|
|
switch (tag_identity->byte_size())
|
|
{
|
|
case 1:
|
|
if (tag_value == 0xd2)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
case 2:
|
|
if (tag_value == 0xd2d2)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
case 4:
|
|
if (tag_value == 0xd2d2d2d2)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
case 8:
|
|
if (uint64_t(tag_value) == 0xd2d2d2d2d2d2d2d2)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
UNEXPECTED;
|
|
break;
|
|
}
|
|
}
|
|
|
|
auto tag_name = get_enum_item_attr_or_key(tag_identity, tag_value, attr_name);
|
|
if (!tag_name)
|
|
{
|
|
FAIL("tagged union tag (accessed as " << tag_item.path << ") value (" << tag_value << ") not defined in enum " << tag_cs.identity->getFullName());
|
|
return;
|
|
}
|
|
|
|
if (!*tag_name)
|
|
{
|
|
FAIL("tagged union tag (accessed as " << tag_item.path << ") value (" << tag_value << ") is unnamed");
|
|
return;
|
|
}
|
|
|
|
for (auto field = union_type->getFields(); field->mode != struct_field_info::END; field++)
|
|
{
|
|
if (strcmp(field->name, *tag_name))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (field->offset != 0)
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
|
|
dispatch_item(QueueItem(item, field->name, item.ptr), field);
|
|
return;
|
|
}
|
|
|
|
// don't ask for fields if it's all padding
|
|
if (all_padding)
|
|
{
|
|
return;
|
|
}
|
|
|
|
FAIL("tagged union missing " << *tag_name << " field to match tag (accessed as " << tag_item.path << ") value (" << tag_value << ")");
|
|
}
|
|
void Checker::dispatch_tagged_union_vector(const QueueItem & item, const QueueItem & tag_item, const CheckedStructure & cs, const CheckedStructure & tag_cs, const char *attr_name)
|
|
{
|
|
auto union_container_identity = static_cast<container_identity *>(cs.identity);
|
|
CheckedStructure union_item_cs(union_container_identity->getItemType());
|
|
if (union_container_identity->type() != IDTYPE_CONTAINER)
|
|
{
|
|
// assume pointer container
|
|
union_item_cs.identity = wrap_in_pointer(union_item_cs.identity);
|
|
}
|
|
|
|
auto tag_container_identity = static_cast<container_identity *>(tag_cs.identity);
|
|
auto tag_container_base = tag_container_identity->getFullName(nullptr);
|
|
if (tag_container_base == "vector<void>")
|
|
{
|
|
auto vec_union = validate_vector_size(item, union_item_cs);
|
|
CheckedStructure tag_item_cs(tag_container_identity->getItemType());
|
|
auto vec_tag = validate_vector_size(tag_item, tag_item_cs);
|
|
if (!vec_union.first || !vec_tag.first)
|
|
{
|
|
// invalid vectors (already warned)
|
|
return;
|
|
}
|
|
if (!vec_union.second.count && !vec_tag.second.count)
|
|
{
|
|
// empty vectors
|
|
return;
|
|
}
|
|
if (vec_union.second.count != vec_tag.second.count)
|
|
{
|
|
FAIL("tagged union vector is " << vec_union.second.count << " elements, but tag vector (accessed as " << tag_item.path << ") is " << vec_tag.second.count << " elements");
|
|
}
|
|
|
|
for (size_t i = 0; i < vec_union.second.count && i < vec_tag.second.count; i++)
|
|
{
|
|
dispatch_tagged_union(QueueItem(item, i, vec_union.first), QueueItem(tag_item, i, vec_tag.first), union_item_cs, tag_item_cs, attr_name);
|
|
vec_union.first = PTR_ADD(vec_union.first, union_item_cs.identity->byte_size());
|
|
vec_tag.first = PTR_ADD(vec_tag.first, tag_item_cs.identity->byte_size());
|
|
}
|
|
}
|
|
else if (tag_container_base == "vector<bool>")
|
|
{
|
|
// TODO
|
|
UNEXPECTED;
|
|
}
|
|
else
|
|
{
|
|
UNEXPECTED;
|
|
}
|
|
}
|
|
void Checker::dispatch_untagged_union(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
// special case for large_integer weirdness
|
|
if (cs.identity == df::identity_traits<df::large_integer>::get())
|
|
{
|
|
// it's 16 bytes on 64-bit linux due to a messy header in libgraphics
|
|
// but only the first 8 bytes are ever used
|
|
dispatch_primitive(item, CheckedStructure(df::identity_traits<int64_t>::get(), 0, nullptr, cs.inside_structure));
|
|
return;
|
|
}
|
|
|
|
FAIL("unhandled untagged union: " << item.path);
|
|
}
|
|
|
|
void Checker::check_unknown_pointer(const QueueItem & item)
|
|
{
|
|
const static CheckedStructure cs(nullptr, 0, nullptr, true);
|
|
if (auto allocated_size = get_allocated_size(item))
|
|
{
|
|
FAIL("pointer to a block of " << allocated_size << " bytes of allocated memory");
|
|
if (allocated_size >= MIN_SIZE_FOR_SUGGEST && known_types_by_size.count(allocated_size))
|
|
{
|
|
FAIL("known types of this size: " << join_strings(", ", known_types_by_size.at(allocated_size)));
|
|
}
|
|
|
|
// check recursively if it's the right size for a pointer
|
|
// or if it starts with what might be a valid pointer
|
|
QueueItem ptr_item(item, "?ptr?", item.ptr);
|
|
if (allocated_size == sizeof(void *) || (allocated_size > sizeof(void *) && is_valid_dereference(ptr_item, 1, true)))
|
|
{
|
|
CheckedStructure ptr_cs(df::identity_traits<void *>::get());
|
|
if (queue_item(ptr_item, ptr_cs))
|
|
{
|
|
queue.pop_back();
|
|
dispatch_pointer(ptr_item, ptr_cs);
|
|
}
|
|
}
|
|
}
|
|
#ifndef WIN32
|
|
else if (auto str = validate_stl_string_pointer(&item.ptr))
|
|
{
|
|
FAIL("untyped pointer is actually stl-string with value \"" << *str << "\" (length " << str->length() << ")");
|
|
}
|
|
#endif
|
|
else if (auto vtable_name = get_vtable_name(QueueItem(item.path, &item.ptr), cs, true))
|
|
{
|
|
FAIL("pointer to a vtable: " << vtable_name);
|
|
}
|
|
else if (sizes)
|
|
{
|
|
//FAIL("pointer to memory with no size information");
|
|
}
|
|
}
|
|
|
|
void Checker::check_stl_vector(const QueueItem & item, type_identity *item_identity, type_identity *eid)
|
|
{
|
|
auto vec_items = validate_vector_size(item, CheckedStructure(item_identity));
|
|
|
|
// skip bad pointer vectors
|
|
if (item.path.length() > 4 && item.path.substr(item.path.length() - 4) == ".bad" && item_identity->type() == IDTYPE_POINTER)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (vec_items.first && vec_items.second.count)
|
|
{
|
|
QueueItem items_item(item.path, vec_items.first);
|
|
queue_item(items_item, vec_items.second);
|
|
}
|
|
}
|
|
|
|
void Checker::check_stl_string(const QueueItem & item)
|
|
{
|
|
const static CheckedStructure cs(df::identity_traits<std::string>::get(), 0, nullptr, true);
|
|
|
|
#ifdef WIN32
|
|
struct string_data
|
|
{
|
|
union
|
|
{
|
|
uintptr_t start;
|
|
char local_data[16];
|
|
};
|
|
size_t length;
|
|
size_t capacity;
|
|
};
|
|
#else
|
|
struct string_data
|
|
{
|
|
struct string_data_inner
|
|
{
|
|
size_t length;
|
|
size_t capacity;
|
|
int32_t refcount;
|
|
} *ptr;
|
|
};
|
|
#endif
|
|
|
|
auto string = reinterpret_cast<const string_data *>(item.ptr);
|
|
#ifdef WIN32
|
|
bool is_local = string->capacity < 16;
|
|
const char *start = is_local ? &string->local_data[0] : reinterpret_cast<const char *>(string->start);
|
|
ptrdiff_t length = string->length;
|
|
ptrdiff_t capacity = string->capacity;
|
|
#else
|
|
if (!is_valid_dereference(QueueItem(item, "?ptr?", string->ptr), 1))
|
|
{
|
|
// nullptr is NOT okay here
|
|
FAIL("invalid string pointer " << stl_sprintf("%p", string->ptr));
|
|
return;
|
|
}
|
|
if (!is_valid_dereference(QueueItem(item, "?hdr?", string->ptr - 1), sizeof(*string->ptr)))
|
|
{
|
|
return;
|
|
}
|
|
const char *start = reinterpret_cast<const char *>(string->ptr);
|
|
ptrdiff_t length = (string->ptr - 1)->length;
|
|
ptrdiff_t capacity = (string->ptr - 1)->capacity;
|
|
#endif
|
|
|
|
if (length < 0)
|
|
{
|
|
FAIL("string length is negative (" << length << ")");
|
|
}
|
|
else if (capacity < 0)
|
|
{
|
|
FAIL("string capacity is negative (" << capacity << ")");
|
|
}
|
|
else if (capacity < length)
|
|
{
|
|
FAIL("string capacity (" << capacity << ") is less than length (" << length << ")");
|
|
}
|
|
|
|
#ifndef WIN32
|
|
const std::string empty_string;
|
|
auto empty_string_data = reinterpret_cast<const string_data *>(&empty_string);
|
|
if (sizes && string->ptr != empty_string_data->ptr)
|
|
{
|
|
size_t allocated_size = get_allocated_size(QueueItem(item, "?hdr?", string->ptr - 1));
|
|
size_t expected_size = sizeof(*string->ptr) + capacity + 1;
|
|
|
|
if (!allocated_size)
|
|
{
|
|
FAIL("pointer does not appear to be a string");
|
|
}
|
|
else if (allocated_size != expected_size)
|
|
{
|
|
FAIL("allocated string data size (" << allocated_size << ") does not match expected size (" << expected_size << ")");
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
void Checker::check_possible_pointer(const QueueItem & item, const CheckedStructure & cs)
|
|
{
|
|
if (sizes && maybepointer && uintptr_t(item.ptr) % sizeof(void *) == 0)
|
|
{
|
|
auto ptr = validate_and_dereference<const void *>(item, true);
|
|
QueueItem ptr_item(item, "?maybe_pointer?", ptr);
|
|
if (ptr && is_valid_dereference(ptr_item, 1, true))
|
|
{
|
|
check_unknown_pointer(ptr_item);
|
|
}
|
|
}
|
|
}
|