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Adds runtime alignment assertions, see #3267

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This commit is contained in:
Daniel J. Hofmann 2016-11-09 00:23:38 +01:00 committed by Patrick Niklaus
parent 7dea7476f1
commit 559c88b36d
3 changed files with 23 additions and 2 deletions
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1
include/storage/shared_datatype.hpp
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@ -106,6 +106,7 @@ struct DataLayout
template <typename T> inline void SetBlockSize(BlockID bid, uint64_t entries)
{
static_assert(sizeof(T) % alignof(T) == 0, "aligned T* can't be used as an array pointer");
num_entries[bid] = entries;
entry_size[bid] = sizeof(T);
entry_align[bid] = alignof(T);

4
include/util/static_rtree.hpp
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@ -373,7 +373,9 @@ class StaticRTree
{
m_leaves_region.open(leaf_file);
std::size_t num_leaves = m_leaves_region.size() / sizeof(LeafNode);
m_leaves.reset(reinterpret_cast<const LeafNode *>(m_leaves_region.data()), num_leaves);
auto data_ptr = m_leaves_region.data();
BOOST_ASSERT(reinterpret_cast<uintptr_t>(data_ptr) % alignof(LeafNode) == 0);
m_leaves.reset(reinterpret_cast<const LeafNode *>(data_ptr), num_leaves);
}
catch (const std::exception &exc)
{

20
src/contractor/contractor.cpp
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@ -69,6 +69,15 @@ template <> struct hash<std::tuple<OSMNodeID, OSMNodeID, OSMNodeID>>
};
}
namespace
{
template <typename T> inline bool is_aligned(const void *pointer)
{
static_assert(sizeof(T) % alignof(T) == 0, "pointer can not be used as an array pointer");
return reinterpret_cast<uintptr_t>(pointer) % alignof(T) == 0;
}
}
namespace osrm
{
namespace contractor
@ -571,6 +580,7 @@ EdgeID Contractor::LoadEdgeExpandedGraph(
};
#pragma pack(pop, r1)
BOOST_ASSERT(is_aligned<EdgeBasedGraphHeader>(edge_based_graph_region.get_address()));
const EdgeBasedGraphHeader graph_header =
*(reinterpret_cast<const EdgeBasedGraphHeader *>(edge_based_graph_region.get_address()));
@ -669,6 +679,7 @@ EdgeID Contractor::LoadEdgeExpandedGraph(
auto region = mmap_file(rtree_leaf_filename.c_str());
region.advise(mapped_region::advice_willneed);
BOOST_ASSERT(is_aligned<LeafNode>(region.get_address()));
const auto bytes = region.get_size();
const auto first = static_cast<const LeafNode *>(region.get_address());
@ -850,16 +861,20 @@ EdgeID Contractor::LoadEdgeExpandedGraph(
auto penaltyblock = reinterpret_cast<const extractor::lookup::PenaltyBlock *>(
edge_penalty_region.get_address());
auto edge_segment_byte_ptr = reinterpret_cast<const char *>(edge_segment_region.get_address());
BOOST_ASSERT(is_aligned<extractor::lookup::PenaltyBlock>(penaltyblock));
auto edge_based_edge_ptr = reinterpret_cast<extractor::EdgeBasedEdge *>(
reinterpret_cast<char *>(edge_based_graph_region.get_address()) +
sizeof(EdgeBasedGraphHeader));
BOOST_ASSERT(is_aligned<extractor::EdgeBasedEdge>(edge_based_edge_ptr));
const auto edge_based_edge_last = reinterpret_cast<extractor::EdgeBasedEdge *>(
reinterpret_cast<char *>(edge_based_graph_region.get_address()) +
sizeof(EdgeBasedGraphHeader) +
sizeof(extractor::EdgeBasedEdge) * graph_header.number_of_edges);
auto edge_segment_byte_ptr = reinterpret_cast<const char *>(edge_segment_region.get_address());
while (edge_based_edge_ptr != edge_based_edge_last)
{
// Make a copy of the data from the memory map
@ -869,8 +884,10 @@ EdgeID Contractor::LoadEdgeExpandedGraph(
if (update_edge_weights || update_turn_penalties)
{
bool skip_this_edge = false;
auto header = reinterpret_cast<const extractor::lookup::SegmentHeaderBlock *>(
edge_segment_byte_ptr);
BOOST_ASSERT(is_aligned<extractor::lookup::SegmentHeaderBlock>(header));
edge_segment_byte_ptr += sizeof(extractor::lookup::SegmentHeaderBlock);
auto previous_osm_node_id = header->previous_osm_node_id;
@ -879,6 +896,7 @@ EdgeID Contractor::LoadEdgeExpandedGraph(
auto segmentblocks =
reinterpret_cast<const extractor::lookup::SegmentBlock *>(edge_segment_byte_ptr);
BOOST_ASSERT(is_aligned<extractor::lookup::SegmentBlock>(segmentblocks));
edge_segment_byte_ptr +=
sizeof(extractor::lookup::SegmentBlock) * (header->num_osm_nodes - 1);