916 lines
27 KiB
C++
916 lines
27 KiB
C++
#include "check-structures-sanity.h"
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#include <cinttypes>
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#include "df/large_integer.h"
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Checker::Checker(color_ostream & out) :
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out(out),
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checked_count(0),
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error_count(0),
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maxerrors(~size_t(0)),
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maxerrors_reported(false),
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enums(false),
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sizes(false),
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unnamed(false),
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failfast(false),
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noprogress(!out.is_console()),
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maybepointer(false)
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{
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Core::getInstance().p->getMemRanges(mapped);
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}
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color_ostream & Checker::fail(int line, const QueueItem & item, const CheckedStructure & cs)
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{
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error_count++;
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out << COLOR_LIGHTRED << "sanity check failed (line " << line << "): ";
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out << COLOR_RESET << (cs.identity ? cs.identity->getFullName() : "?");
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out << " (accessed as " << item.path << "): ";
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out << COLOR_YELLOW;
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if (maxerrors && maxerrors != ~size_t(0))
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maxerrors--;
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return out;
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}
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bool Checker::queue_item(const QueueItem & item, CheckedStructure cs)
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{
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if (!cs.identity)
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{
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UNEXPECTED;
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return false;
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}
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if (cs.identity->type() == IDTYPE_CLASS)
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{
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if (cs.count)
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{
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UNEXPECTED;
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}
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if (get_vtable_name(item, cs, true))
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{
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auto actual_identity = virtual_identity::get(reinterpret_cast<virtual_ptr>(const_cast<void *>(item.ptr)));
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if (static_cast<virtual_identity *>(cs.identity)->is_subclass(actual_identity))
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{
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cs.identity = actual_identity;
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}
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}
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}
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auto ptr_end = PTR_ADD(item.ptr, cs.full_size());
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auto prev = data.lower_bound(item.ptr);
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if (prev != data.cbegin() && uintptr_t(prev->first) > uintptr_t(item.ptr))
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{
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prev--;
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}
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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))
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{
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auto offset = uintptr_t(item.ptr) - uintptr_t(prev->first);
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if (!prev->second.second.has_type_at_offset(cs, offset))
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{
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if (offset == 0 && cs.identity == df::identity_traits<void *>::get())
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{
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FAIL("unknown pointer is " << prev->second.second.identity->getFullName() << ", previously seen at " << prev->second.first);
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return false;
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}
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// TODO
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FAIL("TODO: handle merging structures: " << item.path << " overlaps " << prev->second.first << " (backward)");
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return false;
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}
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// we've already checked this structure, or we're currently queued to do so
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return false;
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}
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auto overlap_start = data.lower_bound(item.ptr);
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auto overlap_end = data.lower_bound(ptr_end);
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for (auto overlap = overlap_start; overlap != overlap_end; overlap++)
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{
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auto offset = uintptr_t(overlap->first) - uintptr_t(item.ptr);
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if (!cs.has_type_at_offset(overlap->second.second, offset))
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{
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// TODO
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FAIL("TODO: handle merging structures: " << overlap->second.first << " overlaps " << item.path << " (forward)");
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return false;
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}
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}
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data.erase(overlap_start, overlap_end);
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data[item.ptr] = std::make_pair(item.path, cs);
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queue.push_back(item);
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return true;
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}
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void Checker::queue_globals()
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{
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auto fields = df::global::_identity.getFields();
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for (auto field = fields; field->mode != struct_field_info::END; field++)
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{
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if (!field->offset)
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{
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UNEXPECTED;
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continue;
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}
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// offset is the position of the DFHack pointer to this global.
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auto ptr = *reinterpret_cast<const void **>(field->offset);
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QueueItem item(stl_sprintf("df.global.%s", field->name), ptr);
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CheckedStructure cs(field);
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if (!ptr)
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{
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FAIL("unknown global address");
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continue;
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}
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if (!strcmp(field->name, "enabler"))
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{
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// don't care about libgraphics as we have the source code
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continue;
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}
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queue_item(item, cs);
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}
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}
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bool Checker::process_queue()
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{
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if (queue.empty())
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{
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return false;
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}
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auto item = std::move(queue.front());
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queue.pop_front();
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auto cs = data.find(item.ptr);
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if (cs == data.end())
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{
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// happens if pointer is determined to be part of a larger structure
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return true;
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}
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dispatch_item(item, cs->second.second);
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return true;
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}
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void Checker::dispatch_item(const QueueItem & base, const CheckedStructure & cs)
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{
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if (!is_valid_dereference(base, cs))
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{
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return;
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}
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if (!cs.count)
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{
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dispatch_single_item(base, cs);
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return;
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}
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if (sizes && !cs.inside_structure)
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{
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if (auto allocated_size = get_allocated_size(base))
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{
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auto expected_size = cs.identity->byte_size();
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if (cs.allocated_count)
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expected_size *= cs.allocated_count;
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else if (cs.count)
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expected_size *= cs.count;
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if (cs.identity->type() == IDTYPE_CLASS && get_vtable_name(base, cs, true))
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{
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if (cs.count)
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{
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UNEXPECTED;
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}
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auto virtual_type = virtual_identity::get(static_cast<virtual_ptr>(const_cast<void *>(base.ptr)));
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expected_size = virtual_type->byte_size();
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}
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auto & item = base;
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if (allocated_size > expected_size)
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{
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FAIL("identified structure is too small (expected " << expected_size << " bytes, but there are " << allocated_size << " bytes allocated)");
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}
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else if (allocated_size < expected_size)
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{
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FAIL("identified structure is too big (expected " << expected_size << " bytes, but there are " << allocated_size << " bytes allocated)");
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}
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}
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else
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{
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UNEXPECTED;
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}
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}
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auto ptr = base.ptr;
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auto size = cs.identity->byte_size();
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for (size_t i = 0; i < cs.count; i++)
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{
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QueueItem item(base, i, ptr);
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dispatch_single_item(item, cs);
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ptr = PTR_ADD(ptr, size);
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}
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}
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void Checker::dispatch_single_item(const QueueItem & item, const CheckedStructure & cs)
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{
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checked_count++;
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if (!maxerrors)
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{
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if (!maxerrors_reported)
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{
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FAIL("error limit reached. bailing out with " << (queue.size() + 1) << " items remaining in the queue.");
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maxerrors_reported = true;
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}
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queue.clear();
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return;
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}
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switch (cs.identity->type())
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{
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case IDTYPE_GLOBAL:
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case IDTYPE_FUNCTION:
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UNEXPECTED;
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break;
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case IDTYPE_PRIMITIVE:
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dispatch_primitive(item, cs);
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break;
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case IDTYPE_POINTER:
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dispatch_pointer(item, cs);
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break;
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case IDTYPE_CONTAINER:
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dispatch_container(item, cs);
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break;
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case IDTYPE_PTR_CONTAINER:
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dispatch_ptr_container(item, cs);
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break;
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case IDTYPE_BIT_CONTAINER:
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dispatch_bit_container(item, cs);
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break;
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case IDTYPE_BITFIELD:
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dispatch_bitfield(item, cs);
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break;
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case IDTYPE_ENUM:
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dispatch_enum(item, cs);
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break;
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case IDTYPE_STRUCT:
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dispatch_struct(item, cs);
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break;
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case IDTYPE_CLASS:
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dispatch_class(item, cs);
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break;
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case IDTYPE_BUFFER:
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dispatch_buffer(item, cs);
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break;
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case IDTYPE_STL_PTR_VECTOR:
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dispatch_stl_ptr_vector(item, cs);
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break;
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case IDTYPE_OPAQUE:
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break;
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case IDTYPE_UNION:
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dispatch_untagged_union(item, cs);
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break;
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}
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}
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void Checker::dispatch_primitive(const QueueItem & item, const CheckedStructure & cs)
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{
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if (cs.identity == df::identity_traits<std::string>::get())
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{
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check_stl_string(item);
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}
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else if (cs.identity == df::identity_traits<char *>::get())
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{
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// TODO check c strings
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UNEXPECTED;
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}
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else if (cs.identity == df::identity_traits<bool>::get())
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{
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auto val = *reinterpret_cast<const uint8_t *>(item.ptr);
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if (val > 1 && val != 0xd2)
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{
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FAIL("invalid value for bool: " << int(val));
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}
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}
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else if (dynamic_cast<df::integer_identity_base *>(cs.identity))
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{
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check_possible_pointer(item, cs);
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// TODO check ints?
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}
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else if (dynamic_cast<df::float_identity_base *>(cs.identity))
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{
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// TODO check floats?
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}
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else
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{
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UNEXPECTED;
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}
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}
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void Checker::dispatch_pointer(const QueueItem & item, const CheckedStructure & cs)
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{
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auto target_ptr = validate_and_dereference<const void *>(item);
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if (!target_ptr)
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{
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return;
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}
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#ifdef DFHACK64
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if (uintptr_t(target_ptr) == 0xd2d2d2d2d2d2d2d2)
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#else
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if (uintptr_t(target_ptr) == 0xd2d2d2d2)
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#endif
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{
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return;
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}
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QueueItem target_item(item.path, target_ptr);
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auto target = static_cast<pointer_identity *>(cs.identity)->getTarget();
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if (!target)
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{
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check_unknown_pointer(target_item);
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return;
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}
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CheckedStructure target_cs(target);
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// 256 is an arbitrarily chosen size threshold
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if (cs.count || target->byte_size() <= 256)
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{
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// target is small, or we are inside an array of pointers; handle now
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if (queue_item(target_item, target_cs))
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{
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// we insert it into the queue to make sure we're not stuck in a loop
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// get it back out of the queue to prevent the queue growing too big
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queue.pop_back();
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dispatch_item(target_item, target_cs);
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}
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}
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else
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{
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// target is large and not part of an array; handle later
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queue_item(target_item, target_cs);
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}
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}
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void Checker::dispatch_container(const QueueItem & item, const CheckedStructure & cs)
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{
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auto identity = static_cast<container_identity *>(cs.identity);
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auto base_container = identity->getFullName(nullptr);
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if (base_container == "vector<void>")
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{
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check_stl_vector(item, identity->getItemType(), identity->getIndexEnumType());
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}
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else if (base_container == "deque<void>")
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{
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// TODO: check deque?
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}
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else if (base_container == "DfArray<void>")
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{
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// TODO: check DfArray
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}
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else if (base_container.starts_with("map<"))
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{
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// TODO: check map
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}
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else if (base_container.starts_with("unordered_map<"))
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{
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// TODO: check unordered_map
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}
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else
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{
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UNEXPECTED;
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}
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}
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void Checker::dispatch_ptr_container(const QueueItem & item, const CheckedStructure & cs)
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{
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auto identity = static_cast<container_identity *>(cs.identity);
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auto base_container = identity->getFullName(nullptr);
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{
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UNEXPECTED;
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}
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}
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void Checker::dispatch_bit_container(const QueueItem & item, const CheckedStructure & cs)
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{
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auto identity = static_cast<container_identity *>(cs.identity);
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auto base_container = identity->getFullName(nullptr);
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if (base_container == "BitArray<>")
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{
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// TODO: check DF bit array
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}
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else if (base_container == "vector<bool>")
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{
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// TODO: check stl bit vector
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}
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else
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{
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UNEXPECTED;
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}
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}
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void Checker::dispatch_bitfield(const QueueItem & item, const CheckedStructure & cs)
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{
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check_possible_pointer(item, cs);
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if (!enums)
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{
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return;
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}
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auto bitfield_type = static_cast<bitfield_identity *>(cs.identity);
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uint64_t bitfield_value;
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switch (bitfield_type->byte_size())
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{
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case 1:
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bitfield_value = validate_and_dereference<uint8_t>(item);
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// don't check for uninitialized; too small to be sure
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break;
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case 2:
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bitfield_value = validate_and_dereference<uint16_t>(item);
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if (bitfield_value == 0xd2d2)
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{
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bitfield_value = 0;
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}
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break;
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case 4:
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bitfield_value = validate_and_dereference<uint32_t>(item);
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if (bitfield_value == 0xd2d2d2d2)
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{
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bitfield_value = 0;
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}
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break;
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case 8:
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bitfield_value = validate_and_dereference<uint64_t>(item);
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if (bitfield_value == 0xd2d2d2d2d2d2d2d2)
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{
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bitfield_value = 0;
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}
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break;
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default:
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UNEXPECTED;
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bitfield_value = 0;
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break;
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}
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auto num_bits = bitfield_type->getNumBits();
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auto bits = bitfield_type->getBits();
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for (int i = 0; i < 64; i++)
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{
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if (!(num_bits & 1))
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{
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bitfield_value >>= 1;
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continue;
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}
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bitfield_value >>= 1;
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if (i >= num_bits || !bits[i].size)
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{
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FAIL("bitfield bit " << i << " is out of range");
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}
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else if (unnamed && bits[i].size > 0 && !bits[i].name)
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{
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FAIL("bitfield bit " << i << " is unnamed");
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}
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else if (unnamed && !bits[i + bits[i].size].name)
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{
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FAIL("bitfield bit " << i << " (part of a field starting at bit " << (i + bits[i].size) << ") is unnamed");
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}
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}
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}
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void Checker::dispatch_enum(const QueueItem & item, const CheckedStructure & cs)
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{
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check_possible_pointer(item, cs);
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if (!enums)
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{
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return;
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}
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auto enum_type = static_cast<enum_identity *>(cs.identity);
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auto enum_value = get_int_value(item, enum_type->getBaseType());
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if (enum_type->byte_size() == 2 && uint16_t(enum_value) == 0xd2d2)
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{
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return;
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}
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else if (enum_type->byte_size() == 4 && uint32_t(enum_value) == 0xd2d2d2d2)
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{
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return;
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}
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else if (enum_type->byte_size() == 8 && uint64_t(enum_value) == 0xd2d2d2d2d2d2d2d2)
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{
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return;
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}
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if (is_in_global(item) && enum_value == 0)
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{
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return;
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}
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auto enum_name = get_enum_item_key(enum_type, enum_value);
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if (!enum_name)
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{
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FAIL("enum value (" << enum_value << ") is out of range");
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return;
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}
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if (unnamed && !*enum_name)
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{
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FAIL("enum value (" << enum_value << ") is unnamed");
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}
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}
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void Checker::dispatch_struct(const QueueItem & item, const CheckedStructure & cs)
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{
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auto identity = static_cast<struct_identity *>(cs.identity);
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for (auto p = identity; p; p = p->getParent())
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{
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auto fields = p->getFields();
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if (!fields)
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{
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continue;
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}
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for (auto field = fields; field->mode != struct_field_info::END; field++)
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{
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dispatch_field(item, cs, identity, field);
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}
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}
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}
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void Checker::dispatch_field(const QueueItem & item, const CheckedStructure & cs, struct_identity *identity, const struct_field_info *field)
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{
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if (field->mode == struct_field_info::OBJ_METHOD ||
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field->mode == struct_field_info::CLASS_METHOD)
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{
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return;
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}
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|
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auto field_ptr = PTR_ADD(item.ptr, field->offset);
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QueueItem field_item(item, field->name, field_ptr);
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CheckedStructure field_cs(field);
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auto tag_field = find_union_tag(identity, field);
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if (tag_field)
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{
|
|
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.ends_with(".bad") || item.path.ends_with(".temp_save")) && 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
|
|
{
|
|
uintptr_t start;
|
|
size_t length;
|
|
union
|
|
{
|
|
char local_data[16];
|
|
size_t capacity;
|
|
};
|
|
};
|
|
#endif
|
|
|
|
auto string = reinterpret_cast<const string_data *>(item.ptr);
|
|
#ifdef WIN32
|
|
const bool is_gcc = false;
|
|
const bool is_local = string->capacity < 16;
|
|
#else
|
|
const bool is_gcc = true;
|
|
const bool is_local = string->start == reinterpret_cast<uintptr_t>(&string->local_data[0]);
|
|
#endif
|
|
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;
|
|
|
|
(void)start;
|
|
if (length < 0)
|
|
{
|
|
FAIL("string length is negative (" << length << ")");
|
|
}
|
|
else if (is_gcc && length > 0 && !is_valid_dereference(QueueItem(item, "?start?", reinterpret_cast<void *>(string->start)), 1))
|
|
{
|
|
// nullptr is NOT okay here
|
|
FAIL("invalid string pointer " << stl_sprintf("0x%" PRIxPTR, string->start));
|
|
return;
|
|
}
|
|
else if (is_local && length >= 16)
|
|
{
|
|
FAIL("string length is too large for small string (" << length << ")");
|
|
}
|
|
else if ((!is_gcc || !is_local) && capacity < 0)
|
|
{
|
|
FAIL("string capacity is negative (" << capacity << ")");
|
|
}
|
|
else if ((!is_gcc || !is_local) && capacity < length)
|
|
{
|
|
FAIL("string capacity (" << capacity << ") is less than length (" << length << ")");
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
}
|