#include "mc_mmalloc.h"
#include "mc/AddressSpace.hpp"
#include "mc_unw.h"
+#include "RegionSnapshot.hpp"
SG_BEGIN_DECL()
// ***** Snapshot region
-typedef enum e_mc_region_type_t {
- MC_REGION_TYPE_UNKNOWN = 0,
- MC_REGION_TYPE_HEAP = 1,
- MC_REGION_TYPE_DATA = 2
-} mc_region_type_t;
-
-// TODO, use OO instead of this
-typedef enum e_mc_region_storage_type_t {
- MC_REGION_STORAGE_TYPE_NONE = 0,
- MC_REGION_STORAGE_TYPE_FLAT = 1,
- MC_REGION_STORAGE_TYPE_CHUNKED = 2,
- MC_REGION_STORAGE_TYPE_PRIVATIZED = 3
-} mc_region_storage_type_t;
-
-namespace simgrid {
-namespace mc {
-
-class PerPageCopy {
- PageStore* store_;
- std::vector<std::size_t> pagenos_;
-public:
- PerPageCopy() : store_(nullptr) {}
- PerPageCopy(PerPageCopy const& that)
- {
- store_ = that.store_;
- pagenos_ = that.pagenos_;
- for (std::size_t pageno : pagenos_)
- store_->ref_page(pageno);
- }
- void clear()
- {
- for (std::size_t pageno : pagenos_)
- store_->unref_page(pageno);
- pagenos_.clear();
- }
- ~PerPageCopy() {
- clear();
- }
-
- PerPageCopy(PerPageCopy&& that)
- {
- store_ = that.store_;
- that.store_ = nullptr;
- pagenos_ = std::move(that.pagenos_);
- that.pagenos_.clear();
- }
- PerPageCopy& operator=(PerPageCopy const& that)
- {
- this->clear();
- store_ = that.store_;
- pagenos_ = that.pagenos_;
- for (std::size_t pageno : pagenos_)
- store_->ref_page(pageno);
- return *this;
- }
- PerPageCopy& operator=(PerPageCopy && that)
- {
- this->clear();
- store_ = that.store_;
- that.store_ = nullptr;
- pagenos_ = std::move(that.pagenos_);
- that.pagenos_.clear();
- return *this;
- }
-
- std::size_t page_count() const
- {
- return pagenos_.size();
- }
-
- std::size_t pageno(std::size_t i) const
- {
- return pagenos_[i];
- }
-
- const void* page(std::size_t i) const
- {
- return store_->get_page(pagenos_[i]);
- }
-
- PerPageCopy(PageStore& store, AddressSpace& as,
- remote_ptr<void> addr, std::size_t page_count);
-};
-
-/** @brief Copy/snapshot of a given memory region
- *
- * Different types of region snapshot storage types exist:
- * <ul>
- * <li>flat/dense snapshots are a simple copy of the region;</li>
- * <li>sparse/per-page snapshots are snaapshots which shared
- * identical pages.</li>
- * <li>privatized (SMPI global variable privatisation).
- * </ul>
- *
- * This is handled with a variant based approch:
- *
- * * `storage_type` identified the type of storage;
- * * an anonymous enum is used to distinguish the relevant types for
- * each type.
- */
-class RegionSnapshot {
-private:
- mc_region_type_t region_type_;
- mc_region_storage_type_t storage_type_;
- mc_object_info_t object_info_;
-
- /** @brief Virtual address of the region in the simulated process */
- void *start_addr_;
-
- /** @brief Size of the data region in bytes */
- size_t size_;
-
- /** @brief Permanent virtual address of the region
- *
- * This is usually the same address as the simuilated process address.
- * However, when using SMPI privatization of global variables,
- * each SMPI process has its own set of global variables stored
- * at a different virtual address. The scheduler maps those region
- * on the region of the global variables.
- *
- * */
- void *permanent_addr_;
-
- std::vector<char> flat_data_;
- PerPageCopy page_numbers_;
- std::vector<std::unique_ptr<RegionSnapshot>> privatized_regions_;
-public:
- RegionSnapshot() :
- region_type_(MC_REGION_TYPE_UNKNOWN),
- storage_type_(MC_REGION_STORAGE_TYPE_NONE),
- object_info_(nullptr),
- start_addr_(nullptr),
- size_(0),
- permanent_addr_(nullptr)
- {}
- RegionSnapshot(mc_region_type_t type, void *start_addr, void* permanent_addr, size_t size) :
- region_type_(type),
- storage_type_(MC_REGION_STORAGE_TYPE_NONE),
- object_info_(nullptr),
- start_addr_(start_addr),
- size_(size),
- permanent_addr_(permanent_addr)
- {}
- ~RegionSnapshot();
- RegionSnapshot(RegionSnapshot const&) = delete;
- RegionSnapshot& operator=(RegionSnapshot const&) = delete;
-
- // Data
-
- void clear_data()
- {
- storage_type_ = MC_REGION_STORAGE_TYPE_NONE;
- flat_data_.clear();
- page_numbers_.clear();
- privatized_regions_.clear();
- }
-
- void flat_data(std::vector<char> data)
- {
- storage_type_ = MC_REGION_STORAGE_TYPE_FLAT;
- flat_data_ = std::move(data);
- page_numbers_.clear();
- privatized_regions_.clear();
- }
- std::vector<char> const& flat_data() const { return flat_data_; }
-
- void page_data(PerPageCopy page_data)
- {
- storage_type_ = MC_REGION_STORAGE_TYPE_CHUNKED;
- flat_data_.clear();
- page_numbers_ = std::move(page_data);
- privatized_regions_.clear();
- }
- PerPageCopy const& page_data() const { return page_numbers_; }
-
- void privatized_data(std::vector<std::unique_ptr<RegionSnapshot>> data)
- {
- storage_type_ = MC_REGION_STORAGE_TYPE_PRIVATIZED;
- flat_data_.clear();
- page_numbers_.clear();
- privatized_regions_ = std::move(data);
- }
- std::vector<std::unique_ptr<RegionSnapshot>> const& privatized_data() const
- {
- return privatized_regions_;
- }
-
- mc_object_info_t object_info() const { return object_info_; }
- void object_info(mc_object_info_t info) { object_info_ = info; }
-
- // Other getters
-
- remote_ptr<void> start() const { return remote(start_addr_); }
- remote_ptr<void> end() const { return remote((char*)start_addr_ + size_); }
- remote_ptr<void> permanent_address() const { return remote(permanent_addr_); }
- std::size_t size() const { return size_; }
- mc_region_storage_type_t storage_type() const { return storage_type_; }
- mc_region_type_t region_type() const { return region_type_; }
-
- bool contain(remote_ptr<void> p) const
- {
- return p >= start() && p < end();
- }
-};
-
-}
-}
-
-typedef class simgrid::mc::RegionSnapshot s_mc_mem_region_t, *mc_mem_region_t;
-
-MC_SHOULD_BE_INTERNAL mc_mem_region_t mc_region_new_sparse(
- mc_region_type_t type, void *start_addr, void* data_addr, size_t size);
XBT_INTERNAL void mc_region_restore_sparse(mc_process_t process, mc_mem_region_t reg);
static inline __attribute__ ((always_inline))
void* mc_translate_address_region(uintptr_t addr, mc_mem_region_t region, int process_index)
{
switch (region->storage_type()) {
- case MC_REGION_STORAGE_TYPE_NONE:
+ case simgrid::mc::StorageType::NoData:
default:
xbt_die("Storage type not supported");
- case MC_REGION_STORAGE_TYPE_FLAT:
+ case simgrid::mc::StorageType::Flat:
{
uintptr_t offset = (uintptr_t) addr - (uintptr_t) region->start().address();
return (void *) ((uintptr_t) region->flat_data().data() + offset);
}
- case MC_REGION_STORAGE_TYPE_CHUNKED:
+ case simgrid::mc::StorageType::Chunked:
return mc_translate_address_region_chunked(addr, region);
- case MC_REGION_STORAGE_TYPE_PRIVATIZED:
+ case simgrid::mc::StorageType::Privatized:
{
xbt_assert(process_index >=0,
"Missing process index for privatized region");
xbt_assert((size_t) process_index < region->privatized_data().size(),
"Out of range process index");
- mc_mem_region_t subregion = region->privatized_data()[process_index].get();
- xbt_assert(subregion, "Missing memory region for process %i", process_index);
- return mc_translate_address_region(addr, subregion, process_index);
+ simgrid::mc::RegionSnapshot& subregion= region->privatized_data()[process_index];
+ return mc_translate_address_region(addr, &subregion, process_index);
}
}
}
"Trying to read out of the region boundary.");
switch (region->storage_type()) {
- case MC_REGION_STORAGE_TYPE_NONE:
+ case simgrid::mc::StorageType::NoData:
default:
xbt_die("Storage type not supported");
- case MC_REGION_STORAGE_TYPE_FLAT:
+ case simgrid::mc::StorageType::Flat:
return (char*) region->flat_data().data() + offset;
- case MC_REGION_STORAGE_TYPE_CHUNKED:
+ case simgrid::mc::StorageType::Chunked:
{
// Last byte of the region:
void* end = (char*) addr + size - 1;
// We currently do not pass the process_index to this function so we assume
// that the privatized region has been resolved in the callers:
- case MC_REGION_STORAGE_TYPE_PRIVATIZED:
+ case simgrid::mc::StorageType::Privatized:
xbt_die("Storage type not supported");
}
}
