X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/63e36b5e3deb6682ba14b5f4c7533d0b2c54a024..c9e3badfcca0d44e112171cefd237ed3f0ae01ca:/src/mc/compare.cpp diff --git a/src/mc/compare.cpp b/src/mc/compare.cpp index 3e6a37ee34..4cdf76a96c 100644 --- a/src/mc/compare.cpp +++ b/src/mc/compare.cpp @@ -1,20 +1,20 @@ -/* Copyright (c) 2008-2016. The SimGrid Team. - * All rights reserved. */ +/* Copyright (c) 2008-2017. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -/** \file mc_compare.cpp Memory snapshooting and comparison */ +/** \file compare.cpp Memory snapshooting and comparison */ #include #include #include +#include #include #include -#include -#include +#include "xbt/dynar.h" +#include "xbt/sysdep.h" #include #include @@ -23,31 +23,43 @@ #include "src/internal_config.h" #include "src/xbt/mmalloc/mmprivate.h" -#include "src/xbt/ex_interface.h" #if HAVE_SMPI -#include "src/smpi/private.h" +#include "src/smpi/include/private.hpp" #endif -#include "src/mc/mc_forward.hpp" -#include "src/mc/mc_safety.h" -#include "src/mc/mc_private.h" -#include "src/mc/mc_smx.h" -#include "src/mc/mc_dwarf.hpp" -#include "src/mc/malloc.hpp" #include "src/mc/Frame.hpp" #include "src/mc/ObjectInformation.hpp" +#include "src/mc/Type.hpp" #include "src/mc/Variable.hpp" -#include "src/mc/malloc.hpp" -#include "src/mc/mc_private.h" -#include "src/mc/mc_snapshot.h" #include "src/mc/mc_dwarf.hpp" -#include "src/mc/Type.hpp" +#include "src/mc/mc_forward.hpp" +#include "src/mc/mc_private.hpp" +#include "src/mc/mc_smx.hpp" +#include "src/mc/mc_snapshot.hpp" -using simgrid::mc::remote; +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, xbt, "Logging specific to mc_compare in mc"); + +namespace simgrid { +namespace mc { + +struct HeapLocation; +typedef std::array HeapLocationPair; +typedef std::set HeapLocationPairs; +struct HeapArea; +struct ProcessComparisonState; +struct StateComparator; -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, xbt, - "Logging specific to mc_compare in mc"); +static int compare_heap_area( + StateComparator& state, + int process_index, const void *area1, const void* area2, + Snapshot* snapshot1, Snapshot* snapshot2, + HeapLocationPairs* previous, Type* type, int pointer_level); + +} +} + +using simgrid::mc::remote; /*********************************** Heap comparison ***********************************/ /***************************************************************************************/ @@ -55,31 +67,99 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, xbt, namespace simgrid { namespace mc { -struct ProcessComparisonState { +class HeapLocation { +public: + int block_ = 0; + int fragment_ = 0; + + HeapLocation() = default; + HeapLocation(int block, int fragment = 0) : block_(block), fragment_(fragment) {} + + bool operator==(HeapLocation const& that) const + { + return block_ == that.block_ && fragment_ == that.fragment_; + } + bool operator<(HeapLocation const& that) const + { + return std::make_pair(block_, fragment_) < std::make_pair(that.block_, that.fragment_); + } +}; + +static inline +HeapLocationPair makeHeapLocationPair(int block1, int fragment1, int block2, int fragment2) +{ + return simgrid::mc::HeapLocationPair{{ + simgrid::mc::HeapLocation(block1, fragment1), + simgrid::mc::HeapLocation(block2, fragment2) + }}; +} + +class HeapArea : public HeapLocation { +public: + bool valid_ = false; + HeapArea() = default; + explicit HeapArea(int block) : valid_(true) { block_ = block; } + HeapArea(int block, int fragment) : valid_(true) + { + block_ = block; + fragment_ = fragment; + } +}; + +class ProcessComparisonState { +public: std::vector* to_ignore = nullptr; - std::vector equals_to; + std::vector equals_to; std::vector types; std::size_t heapsize = 0; - void initHeapInformation(xbt_mheap_t heap, - std::vector* i); + void initHeapInformation(xbt_mheap_t heap, std::vector* i); +}; + +namespace { + +/** A hash which works with more stuff + * + * It can hash pairs: the standard hash currently doesn't include this. + */ +template class hash : public std::hash { +}; + +template class hash> { +public: + std::size_t operator()(std::pairconst& x) const + { + hash h1; + hash h2; + return h1(x.first) ^ h2(x.second); + } }; -struct StateComparator { +} + +class StateComparator { +public: s_xbt_mheap_t std_heap_copy; std::size_t heaplimit; std::array processStates; + std::unordered_set, hash>> compared_pointers; + + void clear() + { + compared_pointers.clear(); + } + int initHeapInformation( xbt_mheap_t heap1, xbt_mheap_t heap2, std::vector* i1, std::vector* i2); - s_heap_area_t& equals_to1_(std::size_t i, std::size_t j) + HeapArea& equals_to1_(std::size_t i, std::size_t j) { return processStates[0].equals_to[ MAX_FRAGMENT_PER_BLOCK * i + j]; } - s_heap_area_t& equals_to2_(std::size_t i, std::size_t j) + HeapArea& equals_to2_(std::size_t i, std::size_t j) { return processStates[1].equals_to[ MAX_FRAGMENT_PER_BLOCK * i + j]; } @@ -92,11 +172,11 @@ struct StateComparator { return processStates[1].types[ MAX_FRAGMENT_PER_BLOCK * i + j]; } - s_heap_area_t const& equals_to1_(std::size_t i, std::size_t j) const + HeapArea const& equals_to1_(std::size_t i, std::size_t j) const { return processStates[0].equals_to[ MAX_FRAGMENT_PER_BLOCK * i + j]; } - s_heap_area_t const& equals_to2_(std::size_t i, std::size_t j) const + HeapArea const& equals_to2_(std::size_t i, std::size_t j) const { return processStates[1].equals_to[ MAX_FRAGMENT_PER_BLOCK * i + j]; } @@ -111,20 +191,17 @@ struct StateComparator { /** Check whether two blocks are known to be matching * - * @param state State used * @param b1 Block of state 1 * @param b2 Block of state 2 * @return if the blocks are known to be matching */ bool blocksEqual(int b1, int b2) const { - return this->equals_to1_(b1, 0).block == b2 - && this->equals_to2_(b2, 0).block == b1; + return this->equals_to1_(b1, 0).block_ == b2 && this->equals_to2_(b2, 0).block_ == b1; } /** Check whether two fragments are known to be matching * - * @param state State used * @param b1 Block of state 1 * @param f1 Fragment of state 1 * @param b2 Block of state 2 @@ -133,84 +210,18 @@ struct StateComparator { */ int fragmentsEqual(int b1, int f1, int b2, int f2) const { - return this->equals_to1_(b1, f1).block == b2 - && this->equals_to1_(b1, f1).fragment == f2 - && this->equals_to2_(b2, f2).block == b1 - && this->equals_to2_(b2, f2).fragment == f1; + return this->equals_to1_(b1, f1).block_ == b2 && this->equals_to1_(b1, f1).fragment_ == f2 && + this->equals_to2_(b2, f2).block_ == b1 && this->equals_to2_(b2, f2).fragment_ == f1; } - void match_equals(xbt_dynar_t list); + void match_equals(HeapLocationPairs* list); }; } } -// TODO, make this a field of ModelChecker or something similar -static std::unique_ptr mc_diff_info; - -/*********************************** Free functions ************************************/ - -static void heap_area_pair_free(heap_area_pair_t pair) -{ - xbt_free(pair); - pair = nullptr; -} - -static void heap_area_pair_free_voidp(void *d) -{ - heap_area_pair_free((heap_area_pair_t) * (void **) d); -} - -static void heap_area_free(heap_area_t area) -{ - xbt_free(area); - area = nullptr; -} - /************************************************************************************/ -static s_heap_area_t make_heap_area(int block, int fragment) -{ - s_heap_area_t area; - area.valid = 1; - area.block = block; - area.fragment = fragment; - return area; -} - -static int is_new_heap_area_pair(xbt_dynar_t list, int block1, int fragment1, - int block2, int fragment2) -{ - - unsigned int cursor = 0; - heap_area_pair_t current_pair; - - xbt_dynar_foreach(list, cursor, current_pair) - if (current_pair->block1 == block1 && current_pair->block2 == block2 - && current_pair->fragment1 == fragment1 - && current_pair->fragment2 == fragment2) - return 0; - - return 1; -} - -static int add_heap_area_pair(xbt_dynar_t list, int block1, int fragment1, - int block2, int fragment2) -{ - - if (!is_new_heap_area_pair(list, block1, fragment1, block2, fragment2)) - return 0; - - heap_area_pair_t pair = nullptr; - pair = xbt_new0(s_heap_area_pair_t, 1); - pair->block1 = block1; - pair->fragment1 = fragment1; - pair->block2 = block2; - pair->fragment2 = fragment2; - xbt_dynar_push(list, &pair); - return 1; -} - static ssize_t heap_comparison_ignore_size( std::vector* ignore_list, const void *address) @@ -252,42 +263,26 @@ static bool is_block_stack(int block) namespace simgrid { namespace mc { -void StateComparator::match_equals(xbt_dynar_t list) +void StateComparator::match_equals(HeapLocationPairs* list) { - unsigned int cursor = 0; - heap_area_pair_t current_pair; - - xbt_dynar_foreach(list, cursor, current_pair) { - if (current_pair->fragment1 != -1) { - this->equals_to1_(current_pair->block1, current_pair->fragment1) = - make_heap_area(current_pair->block2, current_pair->fragment2); - this->equals_to2_(current_pair->block2, current_pair->fragment2) = - make_heap_area(current_pair->block1, current_pair->fragment1); + for (auto const& pair : *list) { + if (pair[0].fragment_ != -1) { + this->equals_to1_(pair[0].block_, pair[0].fragment_) = simgrid::mc::HeapArea(pair[1].block_, pair[1].fragment_); + this->equals_to2_(pair[1].block_, pair[1].fragment_) = simgrid::mc::HeapArea(pair[0].block_, pair[0].fragment_); } else { - this->equals_to1_(current_pair->block1, 0) = - make_heap_area(current_pair->block2, current_pair->fragment2); - this->equals_to2_(current_pair->block2, 0) = - make_heap_area(current_pair->block1, current_pair->fragment1); + this->equals_to1_(pair[0].block_, 0) = simgrid::mc::HeapArea(pair[1].block_, pair[1].fragment_); + this->equals_to2_(pair[1].block_, 0) = simgrid::mc::HeapArea(pair[0].block_, pair[0].fragment_); } } } -int init_heap_information(xbt_mheap_t heap1, xbt_mheap_t heap2, - std::vector* i1, - std::vector* i2) -{ - if (mc_diff_info == nullptr) - mc_diff_info = std::unique_ptr(new StateComparator()); - return mc_diff_info->initHeapInformation(heap1, heap2, i1, i2); -} - void ProcessComparisonState::initHeapInformation(xbt_mheap_t heap, std::vector* i) { - auto heaplimit = ((struct mdesc *) heap)->heaplimit; - this->heapsize = ((struct mdesc *) heap)->heapsize; + auto heaplimit = heap->heaplimit; + this->heapsize = heap->heapsize; this->to_ignore = i; - this->equals_to.assign(heaplimit * MAX_FRAGMENT_PER_BLOCK, s_heap_area {0, 0, 0}); + this->equals_to.assign(heaplimit * MAX_FRAGMENT_PER_BLOCK, HeapArea()); this->types.assign(heaplimit * MAX_FRAGMENT_PER_BLOCK, nullptr); } @@ -295,51 +290,50 @@ int StateComparator::initHeapInformation(xbt_mheap_t heap1, xbt_mheap_t heap2, std::vector* i1, std::vector* i2) { - if ((((struct mdesc *) heap1)->heaplimit != - ((struct mdesc *) heap2)->heaplimit) - || - ((((struct mdesc *) heap1)->heapsize != - ((struct mdesc *) heap2)->heapsize))) + if ((heap1->heaplimit != heap2->heaplimit) || (heap1->heapsize != heap2->heapsize)) return -1; - this->heaplimit = ((struct mdesc *) heap1)->heaplimit; + this->heaplimit = heap1->heaplimit; this->std_heap_copy = *mc_model_checker->process().get_heap(); this->processStates[0].initHeapInformation(heap1, i1); this->processStates[1].initHeapInformation(heap2, i2); return 0; } -void reset_heap_information() -{ - -} - // TODO, have a robust way to find it in O(1) static inline mc_mem_region_t MC_get_heap_region(simgrid::mc::Snapshot* snapshot) { - for (auto& region : snapshot->snapshot_regions) + for (auto const& region : snapshot->snapshot_regions) if (region->region_type() == simgrid::mc::RegionType::Heap) return region.get(); xbt_die("No heap region"); } -int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2) +static +int mmalloc_compare_heap( + simgrid::mc::StateComparator& state, simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2) { - simgrid::mc::Process* process = &mc_model_checker->process(); - simgrid::mc::StateComparator *state = mc_diff_info.get(); + simgrid::mc::RemoteClient* process = &mc_model_checker->process(); /* Start comparison */ - size_t i1, i2, j1, j2, k; - void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2; - int nb_diff1 = 0, nb_diff2 = 0; - - int equal, res_compare = 0; + size_t i1; + size_t i2; + size_t j1; + size_t j2; + size_t k; + void* addr_block1; + void* addr_block2; + void* addr_frag1; + void* addr_frag2; + int nb_diff1 = 0; + int nb_diff2 = 0; + int equal; /* Check busy blocks */ - i1 = 1; - malloc_info heapinfo_temp1, heapinfo_temp2; + malloc_info heapinfo_temp1; + malloc_info heapinfo_temp2; malloc_info heapinfo_temp2b; mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); @@ -350,11 +344,11 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot // This is in snapshot do not use them directly: const malloc_info* heapinfos1 = snapshot1->read( - (std::uint64_t)heapinfo_address, simgrid::mc::ProcessIndexMissing); + RemotePtr((std::uint64_t)heapinfo_address), simgrid::mc::ProcessIndexMissing); const malloc_info* heapinfos2 = snapshot2->read( - (std::uint64_t)heapinfo_address, simgrid::mc::ProcessIndexMissing); + RemotePtr((std::uint64_t)heapinfo_address), simgrid::mc::ProcessIndexMissing); - while (i1 < state->heaplimit) { + while (i1 < state.heaplimit) { const malloc_info* heapinfo1 = (const malloc_info*) MC_region_read(heap_region1, &heapinfo_temp1, &heapinfos1[i1], sizeof(malloc_info)); const malloc_info* heapinfo2 = (const malloc_info*) MC_region_read(heap_region2, &heapinfo_temp2, &heapinfos2[i1], sizeof(malloc_info)); @@ -369,52 +363,45 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot abort(); } - addr_block1 = - ((void *) (((ADDR2UINT(i1)) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase)); + addr_block1 = ((void*)(((ADDR2UINT(i1)) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase)); if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED) { /* Large block */ if (is_stack(addr_block1)) { for (k = 0; k < heapinfo1->busy_block.size; k++) - state->equals_to1_(i1 + k, 0) = make_heap_area(i1, -1); + state.equals_to1_(i1 + k, 0) = HeapArea(i1, -1); for (k = 0; k < heapinfo2->busy_block.size; k++) - state->equals_to2_(i1 + k, 0) = make_heap_area(i1, -1); + state.equals_to2_(i1 + k, 0) = HeapArea(i1, -1); i1 += heapinfo1->busy_block.size; continue; } - if (state->equals_to1_(i1, 0).valid) { + if (state.equals_to1_(i1, 0).valid_) { i1++; continue; } - i2 = 1; - equal = 0; - res_compare = 0; + i2 = 1; + equal = 0; /* Try first to associate to same block in the other heap */ - if (heapinfo2->type == heapinfo1->type - && state->equals_to2_(i1, 0).valid == 0) { - addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; - res_compare = - compare_heap_area(simgrid::mc::ProcessIndexMissing, addr_block1, addr_block2, snapshot1, snapshot2, - nullptr, nullptr, 0); + if (heapinfo2->type == heapinfo1->type && state.equals_to2_(i1, 0).valid_ == 0) { + addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + int res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_block1, addr_block2, + snapshot1, snapshot2, nullptr, nullptr, 0); if (res_compare != 1) { for (k = 1; k < heapinfo2->busy_block.size; k++) - state->equals_to2_(i1 + k, 0) = make_heap_area(i1, -1); + state.equals_to2_(i1 + k, 0) = HeapArea(i1, -1); for (k = 1; k < heapinfo1->busy_block.size; k++) - state->equals_to1_(i1 + k, 0) = make_heap_area(i1, -1); + state.equals_to1_(i1 + k, 0) = HeapArea(i1, -1); equal = 1; i1 += heapinfo1->busy_block.size; } } - while (i2 < state->heaplimit && !equal) { + while (i2 < state.heaplimit && not equal) { - addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; + addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; if (i2 == i1) { i2++; @@ -428,70 +415,61 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot continue; } - if (state->equals_to2_(i2, 0).valid) { + if (state.equals_to2_(i2, 0).valid_) { i2++; continue; } - res_compare = - compare_heap_area(simgrid::mc::ProcessIndexMissing, addr_block1, addr_block2, snapshot1, snapshot2, - nullptr, nullptr, 0); + int res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_block1, addr_block2, + snapshot1, snapshot2, nullptr, nullptr, 0); if (res_compare != 1) { for (k = 1; k < heapinfo2b->busy_block.size; k++) - state->equals_to2_(i2 + k, 0) = make_heap_area(i1, -1); + state.equals_to2_(i2 + k, 0) = HeapArea(i1, -1); for (k = 1; k < heapinfo1->busy_block.size; k++) - state->equals_to1_(i1 + k, 0) = make_heap_area(i2, -1); + state.equals_to1_(i1 + k, 0) = HeapArea(i2, -1); equal = 1; i1 += heapinfo1->busy_block.size; } i2++; - } - if (!equal) { - XBT_DEBUG("Block %zu not found (size_used = %zu, addr = %p)", i1, - heapinfo1->busy_block.busy_size, addr_block1); - i1 = state->heaplimit + 1; + if (not equal) { + XBT_DEBUG("Block %zu not found (size_used = %zu, addr = %p)", i1, heapinfo1->busy_block.busy_size, addr_block1); + i1 = state.heaplimit + 1; nb_diff1++; - //i1++; } } else { /* Fragmented block */ for (j1 = 0; j1 < (size_t) (BLOCKSIZE >> heapinfo1->type); j1++) { - if (heapinfo1->busy_frag.frag_size[j1] == -1) /* Free fragment */ + if (heapinfo1->busy_frag.frag_size[j1] == -1) /* Free fragment_ */ continue; - if (state->equals_to1_(i1, j1).valid) + if (state.equals_to1_(i1, j1).valid_) continue; - addr_frag1 = - (void *) ((char *) addr_block1 + (j1 << heapinfo1->type)); + addr_frag1 = (void*)((char*)addr_block1 + (j1 << heapinfo1->type)); i2 = 1; equal = 0; - /* Try first to associate to same fragment in the other heap */ - if (heapinfo2->type == heapinfo1->type - && state->equals_to2_(i1, j1).valid == 0) { + /* Try first to associate to same fragment_ in the other heap */ + if (heapinfo2->type == heapinfo1->type && not state.equals_to2_(i1, j1).valid_) { addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; + (char *) state.std_heap_copy.heapbase; addr_frag2 = (void *) ((char *) addr_block2 + (j1 << heapinfo2->type)); - res_compare = - compare_heap_area(simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, snapshot1, snapshot2, - nullptr, nullptr, 0); + int res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, + snapshot1, snapshot2, nullptr, nullptr, 0); if (res_compare != 1) equal = 1; } - - - while (i2 < state->heaplimit && !equal) { + while (i2 < state.heaplimit && not equal) { const malloc_info* heapinfo2b = (const malloc_info*) MC_region_read( heap_region2, &heapinfo_temp2b, &heapinfos2[i2], @@ -509,7 +487,7 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot } if (heapinfo2b->type < 0) { - fprintf(stderr, "Unkown mmalloc block type.\n"); + fprintf(stderr, "Unknown mmalloc block type.\n"); abort(); } @@ -519,87 +497,67 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot if (i2 == i1 && j2 == j1) continue; - if (state->equals_to2_(i2, j2).valid) + if (state.equals_to2_(i2, j2).valid_) continue; - addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; - addr_frag2 = - (void *) ((char *) addr_block2 + - (j2 << heapinfo2b->type)); - - res_compare = - compare_heap_area(simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, snapshot2, snapshot2, - nullptr, nullptr, 0); + addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + addr_frag2 = (void*)((char*)addr_block2 + (j2 << heapinfo2b->type)); + int res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, + snapshot2, snapshot2, nullptr, nullptr, 0); if (res_compare != 1) { equal = 1; break; } - } i2++; - } - if (!equal) { - XBT_DEBUG - ("Block %zu, fragment %zu not found (size_used = %zd, address = %p)\n", - i1, j1, heapinfo1->busy_frag.frag_size[j1], - addr_frag1); - i2 = state->heaplimit + 1; - i1 = state->heaplimit + 1; + if (not equal) { + XBT_DEBUG("Block %zu, fragment_ %zu not found (size_used = %zd, address = %p)\n", i1, j1, + heapinfo1->busy_frag.frag_size[j1], addr_frag1); + i1 = state.heaplimit + 1; nb_diff1++; break; } - } i1++; - } - } - /* All blocks/fragments are equal to another block/fragment ? */ - size_t i = 1, j = 0; + /* All blocks/fragments are equal to another block/fragment_ ? */ + size_t i = 1; + size_t j = 0; - for(i = 1; i < state->heaplimit; i++) { + for(i = 1; i < state.heaplimit; i++) { const malloc_info* heapinfo1 = (const malloc_info*) MC_region_read( heap_region1, &heapinfo_temp1, &heapinfos1[i], sizeof(malloc_info)); - if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED - && i1 == state->heaplimit - && heapinfo1->busy_block.busy_size > 0 - && state->equals_to1_(i, 0).valid == 0) { - XBT_DEBUG("Block %zu not found (size used = %zu)", i, - heapinfo1->busy_block.busy_size); + if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED && i1 == state.heaplimit && heapinfo1->busy_block.busy_size > 0 && + not state.equals_to1_(i, 0).valid_) { + XBT_DEBUG("Block %zu not found (size used = %zu)", i, heapinfo1->busy_block.busy_size); nb_diff1++; } if (heapinfo1->type <= 0) continue; for (j = 0; j < (size_t) (BLOCKSIZE >> heapinfo1->type); j++) - if (i1 == state->heaplimit - && heapinfo1->busy_frag.frag_size[j] > 0 - && state->equals_to1_(i, j).valid == 0) { - XBT_DEBUG("Block %zu, Fragment %zu not found (size used = %zd)", - i, j, heapinfo1->busy_frag.frag_size[j]); + if (i1 == state.heaplimit && heapinfo1->busy_frag.frag_size[j] > 0 && not state.equals_to1_(i, j).valid_) { + XBT_DEBUG("Block %zu, Fragment %zu not found (size used = %zd)", i, j, heapinfo1->busy_frag.frag_size[j]); nb_diff1++; } } - if (i1 == state->heaplimit) - XBT_DEBUG("Number of blocks/fragments not found in heap1 : %d", nb_diff1); + if (i1 == state.heaplimit) + XBT_DEBUG("Number of blocks/fragments not found in heap1: %d", nb_diff1); - for (i=1; i < state->heaplimit; i++) { + for (i=1; i < state.heaplimit; i++) { const malloc_info* heapinfo2 = (const malloc_info*) MC_region_read( heap_region2, &heapinfo_temp2, &heapinfos2[i], sizeof(malloc_info)); - if (heapinfo2->type == MMALLOC_TYPE_UNFRAGMENTED - && i1 == state->heaplimit - && heapinfo2->busy_block.busy_size > 0 - && state->equals_to2_(i, 0).valid == 0) { + if (heapinfo2->type == MMALLOC_TYPE_UNFRAGMENTED && i1 == state.heaplimit && heapinfo2->busy_block.busy_size > 0 && + not state.equals_to2_(i, 0).valid_) { XBT_DEBUG("Block %zu not found (size used = %zu)", i, heapinfo2->busy_block.busy_size); nb_diff2++; @@ -609,9 +567,7 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot continue; for (j = 0; j < (size_t) (BLOCKSIZE >> heapinfo2->type); j++) - if (i1 == state->heaplimit - && heapinfo2->busy_frag.frag_size[j] > 0 - && state->equals_to2_(i, j).valid == 0) { + if (i1 == state.heaplimit && heapinfo2->busy_frag.frag_size[j] > 0 && not state.equals_to2_(i, j).valid_) { XBT_DEBUG("Block %zu, Fragment %zu not found (size used = %zd)", i, j, heapinfo2->busy_frag.frag_size[j]); nb_diff2++; @@ -619,8 +575,8 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot } - if (i1 == state->heaplimit) - XBT_DEBUG("Number of blocks/fragments not found in heap2 : %d", nb_diff2); + if (i1 == state.heaplimit) + XBT_DEBUG("Number of blocks/fragments not found in heap2: %d", nb_diff2); return nb_diff1 > 0 || nb_diff2 > 0; } @@ -637,14 +593,14 @@ int mmalloc_compare_heap(simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot * @param check_ignore */ static int compare_heap_area_without_type( - simgrid::mc::StateComparator *state, int process_index, + simgrid::mc::StateComparator& state, int process_index, const void *real_area1, const void *real_area2, simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2, - xbt_dynar_t previous, int size, + HeapLocationPairs* previous, int size, int check_ignore) { - simgrid::mc::Process* process = &mc_model_checker->process(); + simgrid::mc::RemoteClient* process = &mc_model_checker->process(); mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); @@ -652,10 +608,10 @@ static int compare_heap_area_without_type( if (check_ignore > 0) { ssize_t ignore1 = heap_comparison_ignore_size( - state->processStates[0].to_ignore, (char *) real_area1 + i); + state.processStates[0].to_ignore, (char *) real_area1 + i); if (ignore1 != -1) { ssize_t ignore2 = heap_comparison_ignore_size( - state->processStates[1].to_ignore, (char *) real_area2 + i); + state.processStates[1].to_ignore, (char *) real_area2 + i); if (ignore2 == ignore1) { if (ignore1 == 0) { check_ignore--; @@ -683,14 +639,14 @@ static int compare_heap_area_without_type( continue; } - if (addr_pointed1 > state->std_heap_copy.heapbase + if (addr_pointed1 > state.std_heap_copy.heapbase && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1) - && addr_pointed2 > state->std_heap_copy.heapbase + && addr_pointed2 > state.std_heap_copy.heapbase && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) { // Both addreses are in the heap: - int res_compare = - compare_heap_area(process_index, addr_pointed1, addr_pointed2, snapshot1, - snapshot2, previous, nullptr, 0); + int res_compare = compare_heap_area(state ,process_index, + addr_pointed1, addr_pointed2, + snapshot1, snapshot2, previous, nullptr, 0); if (res_compare == 1) return res_compare; i = pointer_align + sizeof(void *); @@ -714,215 +670,194 @@ static int compare_heap_area_without_type( * @param snapshot1 Snapshot of state 1 * @param snapshot2 Snapshot of state 2 * @param previous - * @param type_id + * @param type * @param area_size either a byte_size or an elements_count (?) * @param check_ignore * @param pointer_level * @return 0 (same), 1 (different), -1 (unknown) */ static int compare_heap_area_with_type( - simgrid::mc::StateComparator *state, int process_index, + simgrid::mc::StateComparator& state, int process_index, const void *real_area1, const void *real_area2, simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2, - xbt_dynar_t previous, simgrid::mc::Type* type, + HeapLocationPairs* previous, simgrid::mc::Type* type, int area_size, int check_ignore, int pointer_level) { -top: - - // HACK: This should not happen but in pratice, there are some - // DW_TAG_typedef without an associated DW_AT_type: - //<1><538832>: Abbrev Number: 111 (DW_TAG_typedef) - // <538833> DW_AT_name : (indirect string, offset: 0x2292f3): gregset_t - // <538837> DW_AT_decl_file : 98 - // <538838> DW_AT_decl_line : 37 - if (type == nullptr) - return 0; - - if (is_stack(real_area1) && is_stack(real_area2)) - return 0; + do { + + // HACK: This should not happen but in pratice, there are some + // DW_TAG_typedef without an associated DW_AT_type: + //<1><538832>: Abbrev Number: 111 (DW_TAG_typedef) + // <538833> DW_AT_name : (indirect string, offset: 0x2292f3): gregset_t + // <538837> DW_AT_decl_file : 98 + // <538838> DW_AT_decl_line : 37 + if (type == nullptr) + return 0; - if (check_ignore > 0) { - ssize_t ignore1 = heap_comparison_ignore_size( - state->processStates[0].to_ignore, real_area1); - if (ignore1 > 0 - && heap_comparison_ignore_size( - state->processStates[1].to_ignore, real_area2) == ignore1) + if (is_stack(real_area1) && is_stack(real_area2)) return 0; - } - simgrid::mc::Type *subtype, *subsubtype; - int res, elm_size; - const void *addr_pointed1, *addr_pointed2; + if (check_ignore > 0) { + ssize_t ignore1 = heap_comparison_ignore_size(state.processStates[0].to_ignore, real_area1); + if (ignore1 > 0 && heap_comparison_ignore_size(state.processStates[1].to_ignore, real_area2) == ignore1) + return 0; + } - mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); - mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); + simgrid::mc::Type* subtype; + simgrid::mc::Type* subsubtype; + int res; + int elm_size; + const void* addr_pointed1; + const void* addr_pointed2; - switch (type->type) { - case DW_TAG_unspecified_type: - return 1; + mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); + mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); - case DW_TAG_base_type: - if (!type->name.empty() && type->name == "char") { /* String, hence random (arbitrary ?) size */ - if (real_area1 == real_area2) - return -1; - else - return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, area_size) != 0; - } else { - if (area_size != -1 && type->byte_size != area_size) - return -1; - else - return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0; - } - break; + switch (type->type) { + case DW_TAG_unspecified_type: + return 1; - case DW_TAG_enumeration_type: - if (area_size != -1 && type->byte_size != area_size) - return -1; - return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0; - - case DW_TAG_typedef: - case DW_TAG_const_type: - case DW_TAG_volatile_type: - // Poor man's TCO: - type = type->subtype; - goto top; - - case DW_TAG_array_type: - subtype = type->subtype; - switch (subtype->type) { - case DW_TAG_unspecified_type: - return 1; + case DW_TAG_base_type: + if (not type->name.empty() && type->name == "char") { /* String, hence random (arbitrary ?) size */ + if (real_area1 == real_area2) + return -1; + else + return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, area_size) != 0; + } else { + if (area_size != -1 && type->byte_size != area_size) + return -1; + else + return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0; + } + break; - case DW_TAG_base_type: - case DW_TAG_enumeration_type: - case DW_TAG_pointer_type: - case DW_TAG_reference_type: - case DW_TAG_rvalue_reference_type: - case DW_TAG_structure_type: - case DW_TAG_class_type: - case DW_TAG_union_type: - if (subtype->full_type) - subtype = subtype->full_type; - elm_size = subtype->byte_size; - break; - // TODO, just remove the type indirection? - case DW_TAG_const_type: - case DW_TAG_typedef: - case DW_TAG_volatile_type: - subsubtype = subtype->subtype; - if (subsubtype->full_type) - subsubtype = subsubtype->full_type; - elm_size = subsubtype->byte_size; - break; - default: - return 0; - break; - } - for (int i = 0; i < type->element_count; i++) { - // TODO, add support for variable stride (DW_AT_byte_stride) - res = - compare_heap_area_with_type(state, process_index, - (char *) real_area1 + (i * elm_size), - (char *) real_area2 + (i * elm_size), - snapshot1, snapshot2, previous, - type->subtype, subtype->byte_size, - check_ignore, pointer_level); - if (res == 1) - return res; - } - return 0; + case DW_TAG_enumeration_type: + if (area_size != -1 && type->byte_size != area_size) + return -1; + return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0; - case DW_TAG_reference_type: - case DW_TAG_rvalue_reference_type: - case DW_TAG_pointer_type: - if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) { - addr_pointed1 = snapshot1->read(remote((void**)real_area1), process_index); - addr_pointed2 = snapshot2->read(remote((void**)real_area2), process_index); - return (addr_pointed1 != addr_pointed2); - } - pointer_level++; - if (pointer_level <= 1) { - addr_pointed1 = snapshot1->read(remote((void**)real_area1), process_index); - addr_pointed2 = snapshot2->read(remote((void**)real_area2), process_index); - if (addr_pointed1 > state->std_heap_copy.heapbase - && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1) - && addr_pointed2 > state->std_heap_copy.heapbase - && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) - return compare_heap_area(process_index, addr_pointed1, addr_pointed2, snapshot1, - snapshot2, previous, type->subtype, - pointer_level); - else - return (addr_pointed1 != addr_pointed2); - } - for (size_t i = 0; i < (area_size / sizeof(void *)); i++) { - addr_pointed1 = snapshot1->read( - remote((void**)((char*) real_area1 + i * sizeof(void *))), - process_index); - addr_pointed2 = snapshot2->read( - remote((void**)((char*) real_area2 + i * sizeof(void *))), - process_index); - if (addr_pointed1 > state->std_heap_copy.heapbase - && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1) - && addr_pointed2 > state->std_heap_copy.heapbase - && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) - res = - compare_heap_area(process_index, addr_pointed1, addr_pointed2, snapshot1, - snapshot2, previous, type->subtype, - pointer_level); - else - res = (addr_pointed1 != addr_pointed2); - if (res == 1) - return res; - } - return 0; + case DW_TAG_typedef: + case DW_TAG_const_type: + case DW_TAG_volatile_type: + // Poor man's TCO: + type = type->subtype; + continue; // restart + + case DW_TAG_array_type: + subtype = type->subtype; + switch (subtype->type) { + case DW_TAG_unspecified_type: + return 1; + + case DW_TAG_base_type: + case DW_TAG_enumeration_type: + case DW_TAG_pointer_type: + case DW_TAG_reference_type: + case DW_TAG_rvalue_reference_type: + case DW_TAG_structure_type: + case DW_TAG_class_type: + case DW_TAG_union_type: + if (subtype->full_type) + subtype = subtype->full_type; + elm_size = subtype->byte_size; + break; + // TODO, just remove the type indirection? + case DW_TAG_const_type: + case DW_TAG_typedef: + case DW_TAG_volatile_type: + subsubtype = subtype->subtype; + if (subsubtype->full_type) + subsubtype = subsubtype->full_type; + elm_size = subsubtype->byte_size; + break; + default: + return 0; + break; + } + for (int i = 0; i < type->element_count; i++) { + // TODO, add support for variable stride (DW_AT_byte_stride) + res = compare_heap_area_with_type(state, process_index, (char*)real_area1 + (i * elm_size), + (char*)real_area2 + (i * elm_size), snapshot1, snapshot2, previous, + type->subtype, subtype->byte_size, check_ignore, pointer_level); + if (res == 1) + return res; + } + return 0; - case DW_TAG_structure_type: - case DW_TAG_class_type: - if (type->full_type) - type = type->full_type; - if (area_size != -1 && type->byte_size != area_size) { - if (area_size <= type->byte_size || area_size % type->byte_size != 0) - return -1; - for (size_t i = 0; i < (size_t)(area_size / type->byte_size); i++) { - int res = compare_heap_area_with_type(state, process_index, - (char *) real_area1 + i * type->byte_size, - (char *) real_area2 + i * type->byte_size, - snapshot1, snapshot2, previous, type, -1, - check_ignore, 0); - if (res == 1) - return res; - } - } else { - for(simgrid::mc::Member& member : type->members) { - // TODO, optimize this? (for the offset case) - void *real_member1 = simgrid::dwarf::resolve_member( - real_area1, type, &member, (simgrid::mc::AddressSpace*) snapshot1, process_index); - void *real_member2 = simgrid::dwarf::resolve_member( - real_area2, type, &member, (simgrid::mc::AddressSpace*) snapshot2, process_index); - int res = compare_heap_area_with_type( - state, process_index, real_member1, real_member2, - snapshot1, snapshot2, - previous, member.type, -1, - check_ignore, 0); - if (res == 1) - return res; - } - } - return 0; + case DW_TAG_reference_type: + case DW_TAG_rvalue_reference_type: + case DW_TAG_pointer_type: + if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) { + addr_pointed1 = snapshot1->read(remote((void**)real_area1), process_index); + addr_pointed2 = snapshot2->read(remote((void**)real_area2), process_index); + return (addr_pointed1 != addr_pointed2); + } + pointer_level++; + if (pointer_level <= 1) { + addr_pointed1 = snapshot1->read(remote((void**)real_area1), process_index); + addr_pointed2 = snapshot2->read(remote((void**)real_area2), process_index); + if (addr_pointed1 > state.std_heap_copy.heapbase && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1) && + addr_pointed2 > state.std_heap_copy.heapbase && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) + return compare_heap_area(state, process_index, addr_pointed1, addr_pointed2, snapshot1, snapshot2, previous, + type->subtype, pointer_level); + else + return (addr_pointed1 != addr_pointed2); + } + for (size_t i = 0; i < (area_size / sizeof(void*)); i++) { + addr_pointed1 = snapshot1->read(remote((void**)((char*)real_area1 + i * sizeof(void*))), process_index); + addr_pointed2 = snapshot2->read(remote((void**)((char*)real_area2 + i * sizeof(void*))), process_index); + if (addr_pointed1 > state.std_heap_copy.heapbase && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1) && + addr_pointed2 > state.std_heap_copy.heapbase && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) + res = compare_heap_area(state, process_index, addr_pointed1, addr_pointed2, snapshot1, snapshot2, previous, + type->subtype, pointer_level); + else + res = (addr_pointed1 != addr_pointed2); + if (res == 1) + return res; + } + return 0; - case DW_TAG_union_type: - return compare_heap_area_without_type(state, process_index, real_area1, real_area2, - snapshot1, snapshot2, previous, - type->byte_size, check_ignore); - return 0; + case DW_TAG_structure_type: + case DW_TAG_class_type: + if (type->full_type) + type = type->full_type; + if (area_size != -1 && type->byte_size != area_size) { + if (area_size <= type->byte_size || area_size % type->byte_size != 0) + return -1; + for (size_t i = 0; i < (size_t)(area_size / type->byte_size); i++) { + int res = compare_heap_area_with_type(state, process_index, (char*)real_area1 + i * type->byte_size, + (char*)real_area2 + i * type->byte_size, snapshot1, snapshot2, + previous, type, -1, check_ignore, 0); + if (res == 1) + return res; + } + } else { + for (simgrid::mc::Member& member : type->members) { + // TODO, optimize this? (for the offset case) + void* real_member1 = simgrid::dwarf::resolve_member(real_area1, type, &member, + (simgrid::mc::AddressSpace*)snapshot1, process_index); + void* real_member2 = simgrid::dwarf::resolve_member(real_area2, type, &member, + (simgrid::mc::AddressSpace*)snapshot2, process_index); + int res = compare_heap_area_with_type(state, process_index, real_member1, real_member2, snapshot1, + snapshot2, previous, member.type, -1, check_ignore, 0); + if (res == 1) + return res; + } + } + return 0; - default: - return 0; - } + case DW_TAG_union_type: + return compare_heap_area_without_type(state, process_index, real_area1, real_area2, snapshot1, snapshot2, + previous, type->byte_size, check_ignore); - xbt_die("Unreachable"); + default: + return 0; + } + + xbt_die("Unreachable"); + } while (true); } /** Infer the type of a part of the block from the type of the block @@ -931,7 +866,7 @@ top: * * TODO, handle subfields ((*p).bar.foo, (*p)[5].bar…) * - * @param type_id DWARF type ID of the root address + * @param type DWARF type ID of the root address * @param area_size * @return DWARF type ID for given offset */ @@ -957,22 +892,21 @@ static simgrid::mc::Type* get_offset_type(void *real_base_address, simgrid::mc:: return nullptr; } - for(simgrid::mc::Member& member : type->members) { + for (simgrid::mc::Member& member : type->members) { if (member.has_offset_location()) { // We have the offset, use it directly (shortcut): if (member.offset() == offset) return member.type; } else { - void *real_member = simgrid::dwarf::resolve_member( - real_base_address, type, &member, snapshot, process_index); - if ((char*) real_member - (char *) real_base_address == offset) + void* real_member = simgrid::dwarf::resolve_member(real_base_address, type, &member, snapshot, process_index); + if ((char*)real_member - (char*)real_base_address == offset) return member.type; } } return nullptr; default: - /* FIXME : other cases ? */ + /* FIXME: other cases ? */ return nullptr; } @@ -989,78 +923,71 @@ static simgrid::mc::Type* get_offset_type(void *real_base_address, simgrid::mc:: * @param pointer_level * @return 0 (same), 1 (different), -1 */ -int compare_heap_area(int process_index, const void *area1, const void *area2, simgrid::mc::Snapshot* snapshot1, - simgrid::mc::Snapshot* snapshot2, xbt_dynar_t previous, +static +int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, + const void *area1, const void *area2, + simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2, + HeapLocationPairs* previous, simgrid::mc::Type* type, int pointer_level) { - simgrid::mc::Process* process = &mc_model_checker->process(); + simgrid::mc::RemoteClient* process = &mc_model_checker->process(); - simgrid::mc::StateComparator *state = mc_diff_info.get(); - - int res_compare; - ssize_t block1, frag1, block2, frag2; + ssize_t block1; + ssize_t block2; ssize_t size; int check_ignore = 0; - void *real_addr_block1, *real_addr_block2, *real_addr_frag1, *real_addr_frag2; int type_size = -1; - int offset1 = 0, offset2 = 0; - int new_size1 = -1, new_size2 = -1; - simgrid::mc::Type *new_type1 = nullptr, *new_type2 = nullptr; + int offset1 = 0; + int offset2 = 0; + int new_size1 = -1; + int new_size2 = -1; - int match_pairs = 0; + simgrid::mc::Type* new_type1 = nullptr; + simgrid::mc::Type* new_type2 = nullptr; + + bool match_pairs = false; // This is the address of std_heap->heapinfo in the application process: void* heapinfo_address = &((xbt_mheap_t) process->heap_address)->heapinfo; - const malloc_info* heapinfos1 = snapshot1->read( - remote((const malloc_info**)heapinfo_address), process_index); - const malloc_info* heapinfos2 = snapshot2->read( - remote((const malloc_info**)heapinfo_address), process_index); + const malloc_info* heapinfos1 = snapshot1->read(remote((const malloc_info**)heapinfo_address), process_index); + const malloc_info* heapinfos2 = snapshot2->read(remote((const malloc_info**)heapinfo_address), process_index); - malloc_info heapinfo_temp1, heapinfo_temp2; + malloc_info heapinfo_temp1; + malloc_info heapinfo_temp2; + simgrid::mc::HeapLocationPairs current; if (previous == nullptr) { - previous = - xbt_dynar_new(sizeof(heap_area_pair_t), heap_area_pair_free_voidp); - match_pairs = 1; + previous = ¤t; + match_pairs = true; } + // Get block number: - block1 = - ((char *) area1 - - (char *) state->std_heap_copy.heapbase) / BLOCKSIZE + 1; - block2 = - ((char *) area2 - - (char *) state->std_heap_copy.heapbase) / BLOCKSIZE + 1; + block1 = ((char*)area1 - (char*)state.std_heap_copy.heapbase) / BLOCKSIZE + 1; + block2 = ((char*)area2 - (char*)state.std_heap_copy.heapbase) / BLOCKSIZE + 1; // If either block is a stack block: if (is_block_stack((int) block1) && is_block_stack((int) block2)) { - add_heap_area_pair(previous, block1, -1, block2, -1); - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + previous->insert(simgrid::mc::makeHeapLocationPair(block1, -1, block2, -1)); + if (match_pairs) + state.match_equals(previous); return 0; } // If either block is not in the expected area of memory: - if (((char *) area1 < (char *) state->std_heap_copy.heapbase) - || (block1 > (ssize_t) state->processStates[0].heapsize) || (block1 < 1) - || ((char *) area2 < (char *) state->std_heap_copy.heapbase) - || (block2 > (ssize_t) state->processStates[1].heapsize) || (block2 < 1)) { - if (match_pairs) - xbt_dynar_free(&previous); + if (((char*)area1 < (char*)state.std_heap_copy.heapbase) || (block1 > (ssize_t)state.processStates[0].heapsize) || + (block1 < 1) || ((char*)area2 < (char*)state.std_heap_copy.heapbase) || + (block2 > (ssize_t)state.processStates[1].heapsize) || (block2 < 1)) { return 1; } // Process address of the block: - real_addr_block1 = (ADDR2UINT(block1) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; - real_addr_block2 = (ADDR2UINT(block2) - 1) * BLOCKSIZE + - (char *) state->std_heap_copy.heapbase; + void* real_addr_block1 = (ADDR2UINT(block1) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + void* real_addr_block2 = (ADDR2UINT(block2) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; if (type) { - if (type->full_type) type = type->full_type; @@ -1069,9 +996,8 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s type = type->subtype; // Find type_size: - if (type->type == DW_TAG_pointer_type - || (type->type == DW_TAG_base_type && !type->name.empty() - && type->name == "char")) + if (type->type == DW_TAG_pointer_type || + (type->type == DW_TAG_base_type && not type->name.empty() && type->name == "char")) type_size = -1; else type_size = type->byte_size; @@ -1089,61 +1015,39 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s if ((heapinfo1->type == MMALLOC_TYPE_FREE || heapinfo1->type==MMALLOC_TYPE_HEAPINFO) && (heapinfo2->type == MMALLOC_TYPE_FREE || heapinfo2->type ==MMALLOC_TYPE_HEAPINFO)) { /* Free block */ - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return 0; } - if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED - && heapinfo2->type == MMALLOC_TYPE_UNFRAGMENTED) { + if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED && heapinfo2->type == MMALLOC_TYPE_UNFRAGMENTED) { /* Complete block */ // TODO, lookup variable type from block type as done for fragmented blocks - offset1 = (char *) area1 - (char *) real_addr_block1; - offset2 = (char *) area2 - (char *) real_addr_block2; - - if (state->equals_to1_(block1, 0).valid - && state->equals_to2_(block2, 0).valid - && state->blocksEqual(block1, block2)) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (state.equals_to1_(block1, 0).valid_ && state.equals_to2_(block2, 0).valid_ && + state.blocksEqual(block1, block2)) { + if (match_pairs) + state.match_equals(previous); return 0; } - if (type_size != -1) { - if (type_size != (ssize_t) heapinfo1->busy_block.busy_size - && type_size != (ssize_t) heapinfo2->busy_block.busy_size - && (type->name.empty() || type->name == "struct s_smx_context")) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } - return -1; - } - } - - if (heapinfo1->busy_block.size != heapinfo2->busy_block.size) { + if (type_size != -1 && type_size != (ssize_t)heapinfo1->busy_block.busy_size && + type_size != (ssize_t)heapinfo2->busy_block.busy_size && + (type->name.empty() || type->name == "struct s_smx_context")) { if (match_pairs) - xbt_dynar_free(&previous); - return 1; + state.match_equals(previous); + return -1; } - if (heapinfo1->busy_block.busy_size != heapinfo2->busy_block.busy_size) { - if (match_pairs) - xbt_dynar_free(&previous); + if (heapinfo1->busy_block.size != heapinfo2->busy_block.size) + return 1; + if (heapinfo1->busy_block.busy_size != heapinfo2->busy_block.busy_size) return 1; - } - if (!add_heap_area_pair(previous, block1, -1, block2, -1)) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (not previous->insert(simgrid::mc::makeHeapLocationPair(block1, -1, block2, -1)).second) { + if (match_pairs) + state.match_equals(previous); return 0; } @@ -1152,21 +1056,16 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s // Remember (basic) type inference. // The current data structure only allows us to do this for the whole block. if (type != nullptr && area1 == real_addr_block1) - state->types1_(block1, 0) = type; + state.types1_(block1, 0) = type; if (type != nullptr && area2 == real_addr_block2) - state->types2_(block2, 0) = type; + state.types2_(block2, 0) = type; if (size <= 0) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return 0; } - frag1 = -1; - frag2 = -1; - if (heapinfo1->busy_block.ignore > 0 && heapinfo2->busy_block.ignore == heapinfo1->busy_block.ignore) check_ignore = heapinfo1->busy_block.ignore; @@ -1174,116 +1073,84 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s } else if ((heapinfo1->type > 0) && (heapinfo2->type > 0)) { /* Fragmented block */ // Fragment number: - frag1 = - ((uintptr_t) (ADDR2UINT(area1) % (BLOCKSIZE))) >> heapinfo1->type; - frag2 = - ((uintptr_t) (ADDR2UINT(area2) % (BLOCKSIZE))) >> heapinfo2->type; - - // Process address of the fragment: - real_addr_frag1 = - (void *) ((char *) real_addr_block1 + - (frag1 << heapinfo1->type)); - real_addr_frag2 = - (void *) ((char *) real_addr_block2 + - (frag2 << heapinfo2->type)); + ssize_t frag1 = ((uintptr_t)(ADDR2UINT(area1) % (BLOCKSIZE))) >> heapinfo1->type; + ssize_t frag2 = ((uintptr_t)(ADDR2UINT(area2) % (BLOCKSIZE))) >> heapinfo2->type; + + // Process address of the fragment_: + void* real_addr_frag1 = (void*)((char*)real_addr_block1 + (frag1 << heapinfo1->type)); + void* real_addr_frag2 = (void*)((char*)real_addr_block2 + (frag2 << heapinfo2->type)); // Check the size of the fragments against the size of the type: if (type_size != -1) { - if (heapinfo1->busy_frag.frag_size[frag1] == -1 - || heapinfo2->busy_frag.frag_size[frag2] == -1) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (heapinfo1->busy_frag.frag_size[frag1] == -1 || heapinfo2->busy_frag.frag_size[frag2] == -1) { + if (match_pairs) + state.match_equals(previous); return -1; } // ? if (type_size != heapinfo1->busy_frag.frag_size[frag1] || type_size != heapinfo2->busy_frag.frag_size[frag2]) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return -1; } } // Check if the blocks are already matched together: - if (state->equals_to1_(block1, frag1).valid - && state->equals_to2_(block2, frag2).valid) { - if (offset1==offset2 && state->fragmentsEqual(block1, frag1, block2, frag2)) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } - return 0; - } + if (state.equals_to1_(block1, frag1).valid_ && state.equals_to2_(block2, frag2).valid_ && offset1 == offset2 && + state.fragmentsEqual(block1, frag1, block2, frag2)) { + if (match_pairs) + state.match_equals(previous); + return 0; } // Compare the size of both fragments: - if (heapinfo1->busy_frag.frag_size[frag1] != - heapinfo2->busy_frag.frag_size[frag2]) { + if (heapinfo1->busy_frag.frag_size[frag1] != heapinfo2->busy_frag.frag_size[frag2]) { if (type_size == -1) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } - return -1; - } else { if (match_pairs) - xbt_dynar_free(&previous); + state.match_equals(previous); + return -1; + } else return 1; - } } - // Size of the fragment: + // Size of the fragment_: size = heapinfo1->busy_frag.frag_size[frag1]; // Remember (basic) type inference. - // The current data structure only allows us to do this for the whole fragment. + // The current data structure only allows us to do this for the whole fragment_. if (type != nullptr && area1 == real_addr_frag1) - state->types1_(block1, frag1) = type; + state.types1_(block1, frag1) = type; if (type != nullptr && area2 == real_addr_frag2) - state->types2_(block2, frag2) = type; + state.types2_(block2, frag2) = type; // The type of the variable is already known: if (type) { - new_type1 = type; - new_type2 = type; + new_type1 = new_type2 = type; } // Type inference from the block type. - else if (state->types1_(block1, frag1) != nullptr - || state->types2_(block2, frag2) != nullptr) { + else if (state.types1_(block1, frag1) != nullptr || state.types2_(block2, frag2) != nullptr) { - offset1 = (char *) area1 - (char *) real_addr_frag1; - offset2 = (char *) area2 - (char *) real_addr_frag2; + offset1 = (char*)area1 - (char*)real_addr_frag1; + offset2 = (char*)area2 - (char*)real_addr_frag2; - if (state->types1_(block1, frag1) != nullptr - && state->types2_(block2, frag2) != nullptr) { + if (state.types1_(block1, frag1) != nullptr && state.types2_(block2, frag2) != nullptr) { new_type1 = - get_offset_type(real_addr_frag1, state->types1_(block1, frag1), - offset1, size, snapshot1, process_index); + get_offset_type(real_addr_frag1, state.types1_(block1, frag1), offset1, size, snapshot1, process_index); new_type2 = - get_offset_type(real_addr_frag2, state->types2_(block2, frag2), - offset1, size, snapshot2, process_index); - } else if (state->types1_(block1, frag1) != nullptr) { + get_offset_type(real_addr_frag2, state.types2_(block2, frag2), offset1, size, snapshot2, process_index); + } else if (state.types1_(block1, frag1) != nullptr) { new_type1 = - get_offset_type(real_addr_frag1, state->types1_(block1, frag1), - offset1, size, snapshot1, process_index); + get_offset_type(real_addr_frag1, state.types1_(block1, frag1), offset1, size, snapshot1, process_index); new_type2 = - get_offset_type(real_addr_frag2, state->types1_(block1, frag1), - offset2, size, snapshot2, process_index); - } else if (state->types2_(block2, frag2) != nullptr) { + get_offset_type(real_addr_frag2, state.types1_(block1, frag1), offset2, size, snapshot2, process_index); + } else if (state.types2_(block2, frag2) != nullptr) { new_type1 = - get_offset_type(real_addr_frag1, state->types2_(block2, frag2), - offset1, size, snapshot1, process_index); + get_offset_type(real_addr_frag1, state.types2_(block2, frag2), offset1, size, snapshot1, process_index); new_type2 = - get_offset_type(real_addr_frag2, state->types2_(block2, frag2), - offset2, size, snapshot2, process_index); + get_offset_type(real_addr_frag2, state.types2_(block2, frag2), offset2, size, snapshot2, process_index); } else { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return -1; } @@ -1300,10 +1167,8 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s new_size2 = type->byte_size; } else { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return -1; } } @@ -1313,255 +1178,195 @@ int compare_heap_area(int process_index, const void *area1, const void *area2, s size = new_size1; } - if (offset1 == 0 && offset2 == 0 - && !add_heap_area_pair(previous, block1, frag1, block2, frag2)) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } - return 0; - } + if (offset1 == 0 && offset2 == 0 && + not previous->insert(simgrid::mc::makeHeapLocationPair(block1, frag1, block2, frag2)).second) { + if (match_pairs) + state.match_equals(previous); + return 0; + } if (size <= 0) { - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return 0; } - if ((heapinfo1->busy_frag.ignore[frag1] > 0) - && (heapinfo2->busy_frag.ignore[frag2] == - heapinfo1->busy_frag.ignore[frag1])) + if ((heapinfo1->busy_frag.ignore[frag1] > 0) && + (heapinfo2->busy_frag.ignore[frag2] == heapinfo1->busy_frag.ignore[frag1])) check_ignore = heapinfo1->busy_frag.ignore[frag1]; - } else { - if (match_pairs) - xbt_dynar_free(&previous); + } else return 1; - } /* Start comparison */ + int res_compare; if (type) - res_compare = - compare_heap_area_with_type(state, process_index, area1, area2, snapshot1, snapshot2, - previous, type, size, check_ignore, - pointer_level); + res_compare = compare_heap_area_with_type(state, process_index, area1, area2, snapshot1, snapshot2, previous, type, + size, check_ignore, pointer_level); else - res_compare = - compare_heap_area_without_type(state, process_index, area1, area2, snapshot1, snapshot2, - previous, size, check_ignore); + res_compare = compare_heap_area_without_type(state, process_index, area1, area2, snapshot1, snapshot2, previous, + size, check_ignore); - if (res_compare == 1) { - if (match_pairs) - xbt_dynar_free(&previous); + if (res_compare == 1) return res_compare; - } - - if (match_pairs) { - state->match_equals(previous); - xbt_dynar_free(&previous); - } + if (match_pairs) + state.match_equals(previous); return 0; } } } -namespace simgrid { -namespace mc { - -/** A hash which works with more stuff - * - * It can hash pairs: the standard hash currently doesn't include this. - */ -template struct hash : public std::hash {}; - -template -struct hash> { - std::size_t operator()(std::pairconst& x) const - { - struct hash h1; - struct hash h2; - return h1(x.first) ^ h2(x.second); - } -}; - -struct ComparisonState { - std::unordered_set, hash>> compared_pointers; -}; - -} -} - -using simgrid::mc::ComparisonState; - /************************** Snapshot comparison *******************************/ /******************************************************************************/ -static int compare_areas_with_type(ComparisonState& state, +static int compare_areas_with_type(simgrid::mc::StateComparator& state, int process_index, void* real_area1, simgrid::mc::Snapshot* snapshot1, mc_mem_region_t region1, void* real_area2, simgrid::mc::Snapshot* snapshot2, mc_mem_region_t region2, simgrid::mc::Type* type, int pointer_level) { - simgrid::mc::Process* process = &mc_model_checker->process(); + simgrid::mc::RemoteClient* process = &mc_model_checker->process(); simgrid::mc::Type* subtype; simgrid::mc::Type* subsubtype; - int elm_size, i, res; - - top: - switch (type->type) { - case DW_TAG_unspecified_type: - return 1; - - case DW_TAG_base_type: - case DW_TAG_enumeration_type: - case DW_TAG_union_type: - { - return MC_snapshot_region_memcmp( - real_area1, region1, real_area2, region2, - type->byte_size) != 0; - } - case DW_TAG_typedef: - case DW_TAG_volatile_type: - case DW_TAG_const_type: - // Poor man's TCO: - type = type->subtype; - goto top; - case DW_TAG_array_type: - subtype = type->subtype; - switch (subtype->type) { - case DW_TAG_unspecified_type: - return 1; - - case DW_TAG_base_type: - case DW_TAG_enumeration_type: - case DW_TAG_pointer_type: - case DW_TAG_reference_type: - case DW_TAG_rvalue_reference_type: - case DW_TAG_structure_type: - case DW_TAG_class_type: - case DW_TAG_union_type: - if (subtype->full_type) - subtype = subtype->full_type; - elm_size = subtype->byte_size; - break; - case DW_TAG_const_type: - case DW_TAG_typedef: - case DW_TAG_volatile_type: - subsubtype = subtype->subtype; - if (subsubtype->full_type) - subsubtype = subsubtype->full_type; - elm_size = subsubtype->byte_size; - break; - default: - return 0; - break; - } - for (i = 0; i < type->element_count; i++) { - size_t off = i * elm_size; - res = compare_areas_with_type(state, process_index, - (char*) real_area1 + off, snapshot1, region1, - (char*) real_area2 + off, snapshot2, region2, - type->subtype, pointer_level); - if (res == 1) - return res; - } - break; - case DW_TAG_pointer_type: - case DW_TAG_reference_type: - case DW_TAG_rvalue_reference_type: - { - void* addr_pointed1 = MC_region_read_pointer(region1, real_area1); - void* addr_pointed2 = MC_region_read_pointer(region2, real_area2); - - if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) - return (addr_pointed1 != addr_pointed2); - if (addr_pointed1 == nullptr && addr_pointed2 == nullptr) - return 0; - if (addr_pointed1 == nullptr || addr_pointed2 == nullptr) - return 1; - if (!state.compared_pointers.insert( - std::make_pair(addr_pointed1, addr_pointed2)).second) - return 0; + int elm_size; + int i; + int res; - pointer_level++; - - // Some cases are not handled here: - // * the pointers lead to different areas (one to the heap, the other to the RW segment ...); - // * a pointer leads to the read-only segment of the current object; - // * a pointer lead to a different ELF object. + do { + switch (type->type) { + case DW_TAG_unspecified_type: + return 1; - if (addr_pointed1 > process->heap_address - && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)) { - if (! - (addr_pointed2 > process->heap_address - && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2))) + case DW_TAG_base_type: + case DW_TAG_enumeration_type: + case DW_TAG_union_type: + return MC_snapshot_region_memcmp(real_area1, region1, real_area2, region2, type->byte_size) != 0; + case DW_TAG_typedef: + case DW_TAG_volatile_type: + case DW_TAG_const_type: + // Poor man's TCO: + type = type->subtype; + continue; // restart + case DW_TAG_array_type: + subtype = type->subtype; + switch (subtype->type) { + case DW_TAG_unspecified_type: + return 1; + + case DW_TAG_base_type: + case DW_TAG_enumeration_type: + case DW_TAG_pointer_type: + case DW_TAG_reference_type: + case DW_TAG_rvalue_reference_type: + case DW_TAG_structure_type: + case DW_TAG_class_type: + case DW_TAG_union_type: + if (subtype->full_type) + subtype = subtype->full_type; + elm_size = subtype->byte_size; + break; + case DW_TAG_const_type: + case DW_TAG_typedef: + case DW_TAG_volatile_type: + subsubtype = subtype->subtype; + if (subsubtype->full_type) + subsubtype = subsubtype->full_type; + elm_size = subsubtype->byte_size; + break; + default: + return 0; + break; + } + for (i = 0; i < type->element_count; i++) { + size_t off = i * elm_size; + res = compare_areas_with_type(state, process_index, (char*)real_area1 + off, snapshot1, region1, + (char*)real_area2 + off, snapshot2, region2, type->subtype, pointer_level); + if (res == 1) + return res; + } + break; + case DW_TAG_pointer_type: + case DW_TAG_reference_type: + case DW_TAG_rvalue_reference_type: { + void* addr_pointed1 = MC_region_read_pointer(region1, real_area1); + void* addr_pointed2 = MC_region_read_pointer(region2, real_area2); + + if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) + return (addr_pointed1 != addr_pointed2); + if (addr_pointed1 == nullptr && addr_pointed2 == nullptr) + return 0; + if (addr_pointed1 == nullptr || addr_pointed2 == nullptr) return 1; - // The pointers are both in the heap: - return simgrid::mc::compare_heap_area(process_index, addr_pointed1, addr_pointed2, snapshot1, - snapshot2, nullptr, type->subtype, pointer_level); - } + if (not state.compared_pointers.insert(std::make_pair(addr_pointed1, addr_pointed2)).second) + return 0; + + pointer_level++; + + // Some cases are not handled here: + // * the pointers lead to different areas (one to the heap, the other to the RW segment ...) + // * a pointer leads to the read-only segment of the current object + // * a pointer lead to a different ELF object + + if (addr_pointed1 > process->heap_address && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)) { + if (not(addr_pointed2 > process->heap_address && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2))) + return 1; + // The pointers are both in the heap: + return simgrid::mc::compare_heap_area(state, process_index, addr_pointed1, addr_pointed2, snapshot1, + snapshot2, nullptr, type->subtype, pointer_level); + + } else if (region1->contain(simgrid::mc::remote(addr_pointed1))) { + // The pointers are both in the current object R/W segment: + if (not region2->contain(simgrid::mc::remote(addr_pointed2))) + return 1; + if (not type->type_id) + return (addr_pointed1 != addr_pointed2); + else + return compare_areas_with_type(state, process_index, addr_pointed1, snapshot1, region1, addr_pointed2, + snapshot2, region2, type->subtype, pointer_level); + } else { + + // TODO, We do not handle very well the case where + // it belongs to a different (non-heap) region from the current one. - // The pointers are both in the current object R/W segment: - else if (region1->contain(simgrid::mc::remote(addr_pointed1))) { - if (!region2->contain(simgrid::mc::remote(addr_pointed2))) - return 1; - if (!type->type_id) return (addr_pointed1 != addr_pointed2); - else - return compare_areas_with_type(state, process_index, - addr_pointed1, snapshot1, region1, - addr_pointed2, snapshot2, region2, - type->subtype, pointer_level); + } + break; } - - // TODO, We do not handle very well the case where - // it belongs to a different (non-heap) region from the current one. - - else - return (addr_pointed1 != addr_pointed2); - - break; - } - case DW_TAG_structure_type: - case DW_TAG_class_type: - for(simgrid::mc::Member& member : type->members) { - void *member1 = simgrid::dwarf::resolve_member( - real_area1, type, &member, snapshot1, process_index); - void *member2 = simgrid::dwarf::resolve_member( - real_area2, type, &member, snapshot2, process_index); - mc_mem_region_t subregion1 = mc_get_region_hinted(member1, snapshot1, process_index, region1); - mc_mem_region_t subregion2 = mc_get_region_hinted(member2, snapshot2, process_index, region2); - res = - compare_areas_with_type(state, process_index, - member1, snapshot1, subregion1, - member2, snapshot2, subregion2, - member.type, pointer_level); - if (res == 1) - return res; + case DW_TAG_structure_type: + case DW_TAG_class_type: + for (simgrid::mc::Member& member : type->members) { + void* member1 = simgrid::dwarf::resolve_member(real_area1, type, &member, snapshot1, process_index); + void* member2 = simgrid::dwarf::resolve_member(real_area2, type, &member, snapshot2, process_index); + mc_mem_region_t subregion1 = mc_get_region_hinted(member1, snapshot1, process_index, region1); + mc_mem_region_t subregion2 = mc_get_region_hinted(member2, snapshot2, process_index, region2); + res = compare_areas_with_type(state, process_index, member1, snapshot1, subregion1, member2, snapshot2, + subregion2, member.type, pointer_level); + if (res == 1) + return res; + } + break; + case DW_TAG_subroutine_type: + return -1; + break; + default: + XBT_VERB("Unknown case: %d", type->type); + break; } - break; - case DW_TAG_subroutine_type: - return -1; - break; - default: - XBT_VERB("Unknown case : %d", type->type); - break; - } - return 0; + return 0; + } while (true); } -static int compare_global_variables(simgrid::mc::ObjectInformation* object_info, - int process_index, - mc_mem_region_t r1, - mc_mem_region_t r2, simgrid::mc::Snapshot* snapshot1, - simgrid::mc::Snapshot* snapshot2) +static int compare_global_variables( + simgrid::mc::StateComparator& state, + simgrid::mc::ObjectInformation* object_info, + int process_index, + mc_mem_region_t r1, mc_mem_region_t r2, + simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2) { xbt_assert(r1 && r2, "Missing region."); @@ -1577,11 +1382,12 @@ static int compare_global_variables(simgrid::mc::ObjectInformation* object_info, // Compare the global variables separately for each simulates process: for (size_t process_index = 0; process_index < process_count; process_index++) { - int is_diff = compare_global_variables(object_info, process_index, - &r1->privatized_data()[process_index], - &r2->privatized_data()[process_index], - snapshot1, snapshot2); - if (is_diff) return 1; + if (compare_global_variables(state, + object_info, process_index, + &r1->privatized_data()[process_index], + &r2->privatized_data()[process_index], + snapshot1, snapshot2)) + return 1; } return 0; } @@ -1590,11 +1396,9 @@ static int compare_global_variables(simgrid::mc::ObjectInformation* object_info, #endif xbt_assert(r2->storage_type() != simgrid::mc::StorageType::Privatized); - ComparisonState state; - std::vector& variables = object_info->global_variables; - for (simgrid::mc::Variable& current_var : variables) { + for (simgrid::mc::Variable const& current_var : variables) { // If the variable is not in this object, skip it: // We do not expect to find a pointer to something which is not reachable @@ -1604,8 +1408,7 @@ static int compare_global_variables(simgrid::mc::ObjectInformation* object_info, continue; simgrid::mc::Type* bvariable_type = current_var.type; - int res = - compare_areas_with_type(state, process_index, + int res = compare_areas_with_type(state, process_index, (char *) current_var.address, snapshot1, r1, (char *) current_var.address, snapshot2, r2, bvariable_type, 0); @@ -1615,29 +1418,26 @@ static int compare_global_variables(simgrid::mc::ObjectInformation* object_info, (char *) current_var.address); return 1; } - } return 0; - } -static int compare_local_variables(int process_index, +static int compare_local_variables(simgrid::mc::StateComparator& state, + int process_index, simgrid::mc::Snapshot* snapshot1, simgrid::mc::Snapshot* snapshot2, mc_snapshot_stack_t stack1, mc_snapshot_stack_t stack2) { - ComparisonState state; - if (stack1->local_variables.size() != stack2->local_variables.size()) { XBT_VERB("Different number of local variables"); return 1; } unsigned int cursor = 0; - local_variable_t current_var1, current_var2; - int res; + local_variable_t current_var1; + local_variable_t current_var2; while (cursor < stack1->local_variables.size()) { current_var1 = &stack1->local_variables[cursor]; current_var2 = &stack1->local_variables[cursor]; @@ -1658,22 +1458,18 @@ static int compare_local_variables(int process_index, // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram simgrid::mc::Type* subtype = current_var1->type; - res = - compare_areas_with_type(state, process_index, - current_var1->address, snapshot1, mc_get_snapshot_region(current_var1->address, snapshot1, process_index), - current_var2->address, snapshot2, mc_get_snapshot_region(current_var2->address, snapshot2, process_index), - subtype, 0); - - if (res == 1) { - // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram - XBT_VERB - ("Local variable %s (%p - %p) in frame %s " - "is different between snapshots", - current_var1->name.c_str(), - current_var1->address, - current_var2->address, - current_var1->subprogram->name.c_str()); - return res; + int res = compare_areas_with_type( + state, process_index, current_var1->address, snapshot1, + mc_get_snapshot_region(current_var1->address, snapshot1, process_index), current_var2->address, snapshot2, + mc_get_snapshot_region(current_var2->address, snapshot2, process_index), subtype, 0); + + if (res == 1) { + // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram + XBT_VERB("Local variable %s (%p - %p) in frame %s " + "is different between snapshots", + current_var1->name.c_str(), current_var1->address, current_var2->address, + current_var1->subprogram->name.c_str()); + return res; } cursor++; } @@ -1683,56 +1479,59 @@ static int compare_local_variables(int process_index, namespace simgrid { namespace mc { +static std::unique_ptr state_comparator; + int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc::Snapshot* s2) { - simgrid::mc::Process* process = &mc_model_checker->process(); + // TODO, make this a field of ModelChecker or something similar + + if (state_comparator == nullptr) + state_comparator = std::unique_ptr(new StateComparator()); + else + state_comparator->clear(); + + simgrid::mc::RemoteClient* process = &mc_model_checker->process(); int errors = 0; - int res_init; int hash_result = 0; if (_sg_mc_hash) { hash_result = (s1->hash != s2->hash); if (hash_result) { - XBT_VERB("(%d - %d) Different hash : 0x%" PRIx64 "--0x%" PRIx64, num1, - num2, s1->hash, s2->hash); + XBT_VERB("(%d - %d) Different hash: 0x%" PRIx64 "--0x%" PRIx64, num1, num2, s1->hash, s2->hash); #ifndef MC_DEBUG return 1; #endif } else - XBT_VERB("(%d - %d) Same hash : 0x%" PRIx64, num1, num2, s1->hash); + XBT_VERB("(%d - %d) Same hash: 0x%" PRIx64, num1, num2, s1->hash); } /* Compare enabled processes */ if (s1->enabled_processes != s2->enabled_processes) { - XBT_VERB("(%d - %d) Different enabled processes", num1, num2); - // return 1; ?? + XBT_VERB("(%d - %d) Different amount of enabled processes", num1, num2); + return 1; } - unsigned long i = 0; - size_t size_used1, size_used2; - int is_diff = 0; - /* Compare size of stacks */ - while (i < s1->stacks.size()) { - size_used1 = s1->stack_sizes[i]; - size_used2 = s2->stack_sizes[i]; + int is_diff = 0; + for (unsigned long i = 0; i < s1->stacks.size(); i++) { + size_t size_used1 = s1->stack_sizes[i]; + size_t size_used2 = s2->stack_sizes[i]; if (size_used1 != size_used2) { #ifdef MC_DEBUG - XBT_DEBUG("(%d - %d) Different size used in stacks : %zu - %zu", num1, - num2, size_used1, size_used2); + XBT_DEBUG("(%d - %d) Different size used in stacks: %zu - %zu", num1, num2, size_used1, size_used2); errors++; is_diff = 1; #else #ifdef MC_VERBOSE - XBT_VERB("(%d - %d) Different size used in stacks : %zu - %zu", num1, - num2, size_used1, size_used2); + XBT_VERB("(%d - %d) Different size used in stacks: %zu - %zu", num1, num2, size_used1, size_used2); #endif return 1; #endif } - i++; } + if (is_diff) // do not proceed if there is any stacks that don't match + return 1; /* Init heap information used in heap comparison algorithm */ xbt_mheap_t heap1 = (xbt_mheap_t)s1->read_bytes( @@ -1743,7 +1542,8 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: alloca(sizeof(struct mdesc)), sizeof(struct mdesc), remote(process->heap_address), simgrid::mc::ProcessIndexMissing, simgrid::mc::ReadOptions::lazy()); - res_init = simgrid::mc::init_heap_information(heap1, heap2, &s1->to_ignore, &s2->to_ignore); + int res_init = state_comparator->initHeapInformation(heap1, heap2, &s1->to_ignore, &s2->to_ignore); + if (res_init == -1) { #ifdef MC_DEBUG XBT_DEBUG("(%d - %d) Different heap information", num1, num2); @@ -1758,42 +1558,32 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: } /* Stacks comparison */ - unsigned cursor = 0; int diff_local = 0; -#ifdef MC_DEBUG - is_diff = 0; -#endif - mc_snapshot_stack_t stack1, stack2; - while (cursor < s1->stacks.size()) { - stack1 = &s1->stacks[cursor]; - stack2 = &s2->stacks[cursor]; + for (unsigned int cursor = 0; cursor < s1->stacks.size(); cursor++) { + mc_snapshot_stack_t stack1 = &s1->stacks[cursor]; + mc_snapshot_stack_t stack2 = &s2->stacks[cursor]; if (stack1->process_index != stack2->process_index) { diff_local = 1; XBT_DEBUG("(%d - %d) Stacks with different process index (%i vs %i)", num1, num2, stack1->process_index, stack2->process_index); } - else diff_local = - compare_local_variables(stack1->process_index, s1, s2, stack1, stack2); + else diff_local = compare_local_variables(*state_comparator, + stack1->process_index, s1, s2, stack1, stack2); if (diff_local > 0) { #ifdef MC_DEBUG XBT_DEBUG("(%d - %d) Different local variables between stacks %d", num1, num2, cursor + 1); errors++; - is_diff = 1; #else #ifdef MC_VERBOSE - XBT_VERB("(%d - %d) Different local variables between stacks %d", num1, - num2, cursor + 1); + XBT_VERB("(%d - %d) Different local variables between stacks %u", num1, num2, cursor + 1); #endif - simgrid::mc::reset_heap_information(); - return 1; #endif } - cursor++; } size_t regions_count = s1->snapshot_regions.size(); @@ -1815,13 +1605,9 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: std::string const& name = region1->object_info()->file_name; /* Compare global variables */ - is_diff = - compare_global_variables(region1->object_info(), - simgrid::mc::ProcessIndexDisabled, - region1, region2, - s1, s2); + if (compare_global_variables(*state_comparator, region1->object_info(), simgrid::mc::ProcessIndexDisabled, region1, + region2, s1, s2)) { - if (is_diff != 0) { #ifdef MC_DEBUG XBT_DEBUG("(%d - %d) Different global variables in %s", num1, num2, name.c_str()); @@ -1838,7 +1624,7 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: } /* Compare heap */ - if (simgrid::mc::mmalloc_compare_heap(s1, s2) > 0) { + if (simgrid::mc::mmalloc_compare_heap(*state_comparator, s1, s2) > 0) { #ifdef MC_DEBUG XBT_DEBUG("(%d - %d) Different heap (mmalloc_compare)", num1, num2); @@ -1848,13 +1634,10 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: #ifdef MC_VERBOSE XBT_VERB("(%d - %d) Different heap (mmalloc_compare)", num1, num2); #endif - return 1; #endif } - simgrid::mc::reset_heap_information(); - #ifdef MC_VERBOSE if (errors || hash_result) XBT_VERB("(%d - %d) Difference found", num1, num2); @@ -1868,8 +1651,7 @@ int snapshot_compare(int num1, simgrid::mc::Snapshot* s1, int num2, simgrid::mc: // * There MUST not be any false negative. XBT_VERB("(%d - %d) State equality hash test is %s %s", num1, num2, - (hash_result != 0) == (errors != 0) ? "true" : "false", - !hash_result ? "positive" : "negative"); + (hash_result != 0) == (errors != 0) ? "true" : "false", not hash_result ? "positive" : "negative"); } #endif