X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/280e5fd97b527a1f75efd7e3dc2e3ab3088a82ca..e3cd2ce05b2c30649c7396bbebbf32c7228218fa:/src/mc/compare.cpp diff --git a/src/mc/compare.cpp b/src/mc/compare.cpp index 0905aeec84..4cbb1b891b 100644 --- a/src/mc/compare.cpp +++ b/src/mc/compare.cpp @@ -1,114 +1,60 @@ -/* Copyright (c) 2008-2017. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2008-2019. 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 compare.cpp Memory snapshooting and comparison */ -#include - -#include -#include -#include -#include -#include - -#include -#include -#include - -#include -#include - -#include "src/internal_config.h" - -#include "src/xbt/mmalloc/mmprivate.h" - -#if HAVE_SMPI -#include "src/smpi/private.h" -#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/Frame.hpp" -#include "src/mc/ObjectInformation.hpp" -#include "src/mc/Variable.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_config.hpp" +#include "src/mc/mc_private.hpp" +#include "src/mc/mc_smx.hpp" +#include "src/mc/sosp/Snapshot.hpp" XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, xbt, "Logging specific to mc_compare in mc"); +using simgrid::mc::remote; + namespace simgrid { namespace mc { -struct HeapLocation; -typedef std::array HeapLocationPair; -typedef std::set HeapLocationPairs; -struct HeapArea; -struct ProcessComparisonState; -struct StateComparator; - -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 ***********************************/ /***************************************************************************************/ -namespace simgrid { -namespace mc { +class HeapLocation { +public: + int block_ = 0; + int fragment_ = 0; -struct HeapLocation { - int block = 0; - int fragment = 0; - - HeapLocation() {} - HeapLocation(int block, int fragment = 0) : block(block), fragment(fragment) {} + 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; + 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); + 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) - }}; -} +typedef std::array HeapLocationPair; +typedef std::set HeapLocationPairs; -struct HeapArea : public HeapLocation { - bool valid = false; - int block = 0; - int fragment = 0; - HeapArea() {} - HeapArea(int block) - : valid(true), block(block) {} - HeapArea(int block, int fragment = 0) - : valid(true), block(block), fragment(fragment) {} +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; + } }; -struct ProcessComparisonState { +class ProcessComparisonState { +public: std::vector* to_ignore = nullptr; std::vector equals_to; std::vector types; @@ -117,33 +63,14 @@ struct ProcessComparisonState { 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 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 StateComparator { +class StateComparator { +public: s_xbt_mheap_t std_heap_copy; std::size_t heaplimit; std::array processStates; - std::unordered_set, hash>> compared_pointers; + std::unordered_set, simgrid::xbt::hash>> + compared_pointers; void clear() { @@ -197,8 +124,7 @@ struct StateComparator { */ 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 @@ -211,10 +137,8 @@ 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(HeapLocationPairs* list); @@ -246,6 +170,12 @@ static ssize_t heap_comparison_ignore_size( return -1; } +static bool is_on_heap(const void* address) +{ + const xbt_mheap_t heap = mc_model_checker->process().get_heap(); + return address >= heap->heapbase && address < heap->breakval; +} + static bool is_stack(const void *address) { for (auto const& stack : mc_model_checker->process().stack_areas()) @@ -269,12 +199,12 @@ namespace mc { void StateComparator::match_equals(HeapLocationPairs* list) { 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); + 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_(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); + 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_); } } } @@ -303,59 +233,47 @@ int StateComparator::initHeapInformation(xbt_mheap_t heap1, xbt_mheap_t heap2, } // 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) +static inline Region* MC_get_heap_region(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"); } -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(); +static bool heap_area_differ(StateComparator& state, const void* area1, const void* area2, Snapshot* snapshot1, + Snapshot* snapshot2, HeapLocationPairs* previous, Type* type, int pointer_level); - /* Start comparison */ - 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; - int res_compare = 0; +static bool mmalloc_heap_differ(simgrid::mc::StateComparator& state, simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2) +{ + const simgrid::mc::RemoteClient& process = mc_model_checker->process(); /* Check busy blocks */ - i1 = 1; + size_t i1 = 1; malloc_info heapinfo_temp1; malloc_info heapinfo_temp2; malloc_info heapinfo_temp2b; - mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); - mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); + simgrid::mc::Region* heap_region1 = MC_get_heap_region(snapshot1); + simgrid::mc::Region* heap_region2 = MC_get_heap_region(snapshot2); // This is the address of std_heap->heapinfo in the application process: - void* heapinfo_address = &((xbt_mheap_t) process->heap_address)->heapinfo; + void* heapinfo_address = &((xbt_mheap_t)process.heap_address)->heapinfo; // This is in snapshot do not use them directly: - const malloc_info* heapinfos1 = snapshot1->read( - (std::uint64_t)heapinfo_address, simgrid::mc::ProcessIndexMissing); - const malloc_info* heapinfos2 = snapshot2->read( - (std::uint64_t)heapinfo_address, simgrid::mc::ProcessIndexMissing); + const malloc_info* heapinfos1 = + snapshot1->read(RemotePtr((std::uint64_t)heapinfo_address)); + const malloc_info* heapinfos2 = + snapshot2->read(RemotePtr((std::uint64_t)heapinfo_address)); 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)); + const malloc_info* heapinfo1 = + (const malloc_info*)heap_region1->read(&heapinfo_temp1, &heapinfos1[i1], sizeof(malloc_info)); + const malloc_info* heapinfo2 = + (const malloc_info*)heap_region2->read(&heapinfo_temp2, &heapinfos2[i1], sizeof(malloc_info)); if (heapinfo1->type == MMALLOC_TYPE_FREE || heapinfo1->type == MMALLOC_TYPE_HEAPINFO) { /* Free block */ i1 ++; @@ -367,122 +285,106 @@ int mmalloc_compare_heap( abort(); } - addr_block1 = ((void*)(((ADDR2UINT(i1)) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase)); + void* 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++) + for (size_t k = 0; k < heapinfo1->busy_block.size; k++) state.equals_to1_(i1 + k, 0) = HeapArea(i1, -1); - for (k = 0; k < heapinfo2->busy_block.size; k++) + for (size_t k = 0; k < heapinfo2->busy_block.size; k++) 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; + size_t i2 = 1; + bool equal = false; /* 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(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++) + if (heapinfo2->type == heapinfo1->type && state.equals_to2_(i1, 0).valid_ == 0) { + void* addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + if (not heap_area_differ(state, addr_block1, addr_block2, snapshot1, snapshot2, nullptr, nullptr, 0)) { + for (size_t k = 1; k < heapinfo2->busy_block.size; k++) state.equals_to2_(i1 + k, 0) = HeapArea(i1, -1); - for (k = 1; k < heapinfo1->busy_block.size; k++) + for (size_t k = 1; k < heapinfo1->busy_block.size; k++) state.equals_to1_(i1 + k, 0) = HeapArea(i1, -1); - equal = 1; + equal = true; 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; + void* addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; if (i2 == i1) { i2++; continue; } - const malloc_info* heapinfo2b = (const malloc_info*) MC_region_read(heap_region2, &heapinfo_temp2b, &heapinfos2[i2], sizeof(malloc_info)); + const malloc_info* heapinfo2b = + (const malloc_info*)heap_region2->read(&heapinfo_temp2b, &heapinfos2[i2], sizeof(malloc_info)); if (heapinfo2b->type != MMALLOC_TYPE_UNFRAGMENTED) { i2++; continue; } - if (state.equals_to2_(i2, 0).valid) { + if (state.equals_to2_(i2, 0).valid_) { i2++; continue; } - 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++) + if (not heap_area_differ(state, addr_block1, addr_block2, snapshot1, snapshot2, nullptr, nullptr, 0)) { + for (size_t k = 1; k < heapinfo2b->busy_block.size; k++) state.equals_to2_(i2 + k, 0) = HeapArea(i1, -1); - for (k = 1; k < heapinfo1->busy_block.size; k++) + for (size_t k = 1; k < heapinfo1->busy_block.size; k++) state.equals_to1_(i1 + k, 0) = HeapArea(i2, -1); - equal = 1; + equal = true; i1 += heapinfo1->busy_block.size; } i2++; } - if (!equal) { + 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++; + return true; } } else { /* Fragmented block */ - for (j1 = 0; j1 < (size_t) (BLOCKSIZE >> heapinfo1->type); j1++) { + for (size_t 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)); - - 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) { - addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + - (char *) state.std_heap_copy.heapbase; - addr_frag2 = - (void *) ((char *) addr_block2 + - (j1 << heapinfo2->type)); - res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, snapshot1, - snapshot2, nullptr, nullptr, 0); - if (res_compare != 1) - equal = 1; + void* addr_frag1 = (void*)((char*)addr_block1 + (j1 << heapinfo1->type)); + + size_t i2 = 1; + bool equal = false; + + /* Try first to associate to same fragment_ in the other heap */ + if (heapinfo2->type == heapinfo1->type && not state.equals_to2_(i1, j1).valid_) { + void* addr_block2 = (ADDR2UINT(i1) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + void* addr_frag2 = (void*)((char*)addr_block2 + (j1 << heapinfo2->type)); + if (not heap_area_differ(state, addr_frag1, addr_frag2, snapshot1, snapshot2, nullptr, nullptr, 0)) + equal = true; } - 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], - sizeof(malloc_info)); + const malloc_info* heapinfo2b = + (const malloc_info*)heap_region2->read(&heapinfo_temp2b, &heapinfos2[i2], sizeof(malloc_info)); if (heapinfo2b->type == MMALLOC_TYPE_FREE || heapinfo2b->type == MMALLOC_TYPE_HEAPINFO) { i2 ++; @@ -500,22 +402,19 @@ int mmalloc_compare_heap( abort(); } - for (j2 = 0; j2 < (size_t) (BLOCKSIZE >> heapinfo2b->type); - j2++) { + for (size_t j2 = 0; j2 < (size_t)(BLOCKSIZE >> heapinfo2b->type); j2++) { 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)); + void* addr_block2 = (ADDR2UINT(i2) - 1) * BLOCKSIZE + (char*)state.std_heap_copy.heapbase; + void* addr_frag2 = (void*)((char*)addr_block2 + (j2 << heapinfo2b->type)); - res_compare = compare_heap_area(state, simgrid::mc::ProcessIndexMissing, addr_frag1, addr_frag2, snapshot2, - snapshot2, nullptr, nullptr, 0); - if (res_compare != 1) { - equal = 1; + if (not heap_area_differ(state, addr_frag1, addr_frag2, snapshot1, snapshot2, nullptr, nullptr, 0)) { + equal = true; break; } } @@ -523,13 +422,10 @@ int mmalloc_compare_heap( i2++; } - if (!equal) { - XBT_DEBUG("Block %zu, fragment %zu not found (size_used = %zd, address = %p)\n", i1, j1, + 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); - i2 = state.heaplimit + 1; - i1 = state.heaplimit + 1; - nb_diff1++; - break; + return true; } } @@ -537,62 +433,48 @@ int mmalloc_compare_heap( } } - /* All blocks/fragments are equal to another block/fragment ? */ - size_t i = 1; - size_t j = 0; - - 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)); + /* All blocks/fragments are equal to another block/fragment_ ? */ + for (size_t i = 1; i < state.heaplimit; i++) { + const malloc_info* heapinfo1 = + (const malloc_info*)heap_region1->read(&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) { + not state.equals_to1_(i, 0).valid_) { XBT_DEBUG("Block %zu not found (size used = %zu)", i, heapinfo1->busy_block.busy_size); - nb_diff1++; + return true; } 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) { + for (size_t j = 0; j < (size_t)(BLOCKSIZE >> heapinfo1->type); 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++; + return true; } } - if (i1 == state.heaplimit) - XBT_DEBUG("Number of blocks/fragments not found in heap1: %d", nb_diff1); - - 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) { + for (size_t i = 1; i < state.heaplimit; i++) { + const malloc_info* heapinfo2 = + (const malloc_info*)heap_region2->read(&heapinfo_temp2, &heapinfos2[i], sizeof(malloc_info)); + 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++; + return true; } if (heapinfo2->type <= 0) 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) { + for (size_t j = 0; j < (size_t)(BLOCKSIZE >> heapinfo2->type); j++) + 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++; + return true; } - } - if (i1 == state.heaplimit) - XBT_DEBUG("Number of blocks/fragments not found in heap2: %d", nb_diff2); - - return nb_diff1 > 0 || nb_diff2 > 0; + return false; } /** @@ -605,31 +487,27 @@ int mmalloc_compare_heap( * @param previous * @param size * @param check_ignore + * @return true when different, false otherwise (same or unknown) */ -static int compare_heap_area_without_type( - simgrid::mc::StateComparator& state, int process_index, - const void *real_area1, const void *real_area2, - simgrid::mc::Snapshot* snapshot1, - simgrid::mc::Snapshot* snapshot2, - HeapLocationPairs* previous, int size, - int check_ignore) +static bool heap_area_differ_without_type(simgrid::mc::StateComparator& state, const void* real_area1, + const void* real_area2, simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2, HeapLocationPairs* previous, int size, + int check_ignore) { - simgrid::mc::Process* 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); + const simgrid::mc::RemoteClient& process = mc_model_checker->process(); + simgrid::mc::Region* heap_region1 = MC_get_heap_region(snapshot1); + simgrid::mc::Region* heap_region2 = MC_get_heap_region(snapshot2); for (int i = 0; i < size; ) { if (check_ignore > 0) { - ssize_t ignore1 = heap_comparison_ignore_size( - state.processStates[0].to_ignore, (char *) real_area1 + i); + ssize_t ignore1 = heap_comparison_ignore_size(state.processStates[0].to_ignore, (const char*)real_area1 + i); if (ignore1 != -1) { - ssize_t ignore2 = heap_comparison_ignore_size( - state.processStates[1].to_ignore, (char *) real_area2 + i); + ssize_t ignore2 = heap_comparison_ignore_size(state.processStates[1].to_ignore, (const char*)real_area2 + i); if (ignore2 == ignore1) { if (ignore1 == 0) { check_ignore--; - return 0; + return false; } else { i = i + ignore2; check_ignore--; @@ -639,41 +517,33 @@ static int compare_heap_area_without_type( } } - if (MC_snapshot_region_memcmp(((char *) real_area1) + i, heap_region1, ((char *) real_area2) + i, heap_region2, 1) != 0) { + if (MC_snapshot_region_memcmp((const char*)real_area1 + i, heap_region1, (const char*)real_area2 + i, heap_region2, + 1) != 0) { int pointer_align = (i / sizeof(void *)) * sizeof(void *); - const void* addr_pointed1 = snapshot1->read( - remote((void**)((char *) real_area1 + pointer_align)), process_index); - const void* addr_pointed2 = snapshot2->read( - remote((void**)((char *) real_area2 + pointer_align)), process_index); + const void* addr_pointed1 = snapshot1->read(remote((void**)((const char*)real_area1 + pointer_align))); + const void* addr_pointed2 = snapshot2->read(remote((void**)((const char*)real_area2 + pointer_align))); - if (process->in_maestro_stack(remote(addr_pointed1)) - && process->in_maestro_stack(remote(addr_pointed2))) { + if (process.in_maestro_stack(remote(addr_pointed1)) && process.in_maestro_stack(remote(addr_pointed2))) { i = pointer_align + sizeof(void *); continue; } - 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)) { - // Both addreses are in the heap: - 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; + if (is_on_heap(addr_pointed1) && is_on_heap(addr_pointed2)) { + // Both addresses are in the heap: + if (heap_area_differ(state, addr_pointed1, addr_pointed2, snapshot1, snapshot2, previous, nullptr, 0)) + return true; i = pointer_align + sizeof(void *); continue; } - return 1; + return true; } i++; } - return 0; + return false; } /** @@ -688,19 +558,13 @@ static int compare_heap_area_without_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) + * @return true when different, false otherwise (same or unknown) */ -static int compare_heap_area_with_type( - simgrid::mc::StateComparator& state, int process_index, - const void *real_area1, const void *real_area2, - simgrid::mc::Snapshot* snapshot1, - simgrid::mc::Snapshot* snapshot2, - HeapLocationPairs* previous, simgrid::mc::Type* type, - int area_size, int check_ignore, - int pointer_level) +static bool heap_area_differ_with_type(simgrid::mc::StateComparator& state, const void* real_area1, + const void* real_area2, simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2, 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) @@ -708,195 +572,159 @@ top: // <538837> DW_AT_decl_file : 98 // <538838> DW_AT_decl_line : 37 if (type == nullptr) - return 0; + return false; if (is_stack(real_area1) && is_stack(real_area2)) - return 0; + return false; 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; + 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 false; } simgrid::mc::Type* subtype; simgrid::mc::Type* subsubtype; - int res; int elm_size; const void* addr_pointed1; const void* addr_pointed2; - mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); - mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); + simgrid::mc::Region* heap_region1 = MC_get_heap_region(snapshot1); + simgrid::mc::Region* heap_region2 = MC_get_heap_region(snapshot2); switch (type->type) { - case DW_TAG_unspecified_type: - return 1; - - 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; - - 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; + return true; case DW_TAG_base_type: + if (not type->name.empty() && type->name == "char") { /* String, hence random (arbitrary ?) size */ + if (real_area1 == real_area2) + return false; + 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 false; + else + return MC_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0; + } + 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: + if (area_size != -1 && type->byte_size != area_size) + return false; + 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: - 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_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; + return heap_area_differ_with_type(state, real_area1, real_area2, snapshot1, snapshot2, previous, type->subtype, + area_size, check_ignore, pointer_level); + + case DW_TAG_array_type: + subtype = type->subtype; + switch (subtype->type) { + case DW_TAG_unspecified_type: + return true; + + 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 false; + } + for (int i = 0; i < type->element_count; i++) { + // TODO, add support for variable stride (DW_AT_byte_stride) + if (heap_area_differ_with_type(state, (const char*)real_area1 + (i * elm_size), + (const char*)real_area2 + (i * elm_size), snapshot1, snapshot2, previous, + type->subtype, subtype->byte_size, check_ignore, pointer_level)) + return true; + } + return false; - 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; + 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* const*)real_area1)); + addr_pointed2 = snapshot2->read(remote((void* const*)real_area2)); + return (addr_pointed1 != addr_pointed2); } - } 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; + pointer_level++; + if (pointer_level <= 1) { + addr_pointed1 = snapshot1->read(remote((void* const*)real_area1)); + addr_pointed2 = snapshot2->read(remote((void* const*)real_area2)); + if (is_on_heap(addr_pointed1) && is_on_heap(addr_pointed2)) + return heap_area_differ(state, addr_pointed1, addr_pointed2, snapshot1, snapshot2, previous, type->subtype, + pointer_level); + else + return (addr_pointed1 != addr_pointed2); } - } - return 0; + for (size_t i = 0; i < (area_size / sizeof(void*)); i++) { + addr_pointed1 = snapshot1->read(remote((void* const*)((const char*)real_area1 + i * sizeof(void*)))); + addr_pointed2 = snapshot2->read(remote((void* const*)((const char*)real_area2 + i * sizeof(void*)))); + bool differ = is_on_heap(addr_pointed1) && is_on_heap(addr_pointed2) + ? heap_area_differ(state, addr_pointed1, addr_pointed2, snapshot1, snapshot2, previous, + type->subtype, pointer_level) + : addr_pointed1 != addr_pointed2; + if (differ) + return true; + } + return false; - 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); + 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 false; + for (size_t i = 0; i < (size_t)(area_size / type->byte_size); i++) { + if (heap_area_differ_with_type(state, (const char*)real_area1 + i * type->byte_size, + (const char*)real_area2 + i * type->byte_size, snapshot1, snapshot2, previous, + type, -1, check_ignore, 0)) + return true; + } + } 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); + void* real_member2 = + simgrid::dwarf::resolve_member(real_area2, type, &member, (simgrid::mc::AddressSpace*)snapshot2); + if (heap_area_differ_with_type(state, real_member1, real_member2, snapshot1, snapshot2, previous, + member.type, -1, check_ignore, 0)) + return true; + } + } + return false; - default: - return 0; - } + case DW_TAG_union_type: + return heap_area_differ_without_type(state, real_area1, real_area2, snapshot1, snapshot2, previous, + type->byte_size, check_ignore); - xbt_die("Unreachable"); + default: + XBT_VERB("Unknown case: %d", type->type); + break; + } + return false; } /** Infer the type of a part of the block from the type of the block @@ -909,9 +737,8 @@ top: * @param area_size * @return DWARF type ID for given offset */ -static simgrid::mc::Type* get_offset_type(void *real_base_address, simgrid::mc::Type* type, - int offset, int area_size, - simgrid::mc::Snapshot* snapshot, int process_index) +static simgrid::mc::Type* get_offset_type(void* real_base_address, simgrid::mc::Type* type, int offset, int area_size, + simgrid::mc::Snapshot* snapshot) { // Beginning of the block, the infered variable type if the type of the block: @@ -931,13 +758,13 @@ 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); + void* real_member = simgrid::dwarf::resolve_member(real_base_address, type, &member, snapshot); if ((char*)real_member - (char*)real_base_address == offset) return member.type; } @@ -960,30 +787,19 @@ static simgrid::mc::Type* get_offset_type(void *real_base_address, simgrid::mc:: * @param previous Pairs of blocks already compared on the current path (or nullptr) * @param type_id Type of variable * @param pointer_level - * @return 0 (same), 1 (different), -1 + * @return true when different, false otherwise (same or unknown) */ -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) +static bool heap_area_differ(simgrid::mc::StateComparator& state, 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(); + const simgrid::mc::RemoteClient& process = mc_model_checker->process(); - int res_compare; ssize_t block1; - ssize_t frag1; ssize_t block2; - ssize_t frag2; ssize_t size; int check_ignore = 0; - void* real_addr_block1; - void* real_addr_block2; - void* real_addr_frag1; - void* real_addr_frag2; int type_size = -1; int offset1 = 0; int offset2 = 0; @@ -996,12 +812,13 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, 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; + 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)); + const malloc_info* heapinfos2 = snapshot2->read(remote((const malloc_info**)heapinfo_address)); - malloc_info heapinfo_temp1, heapinfo_temp2; + malloc_info heapinfo_temp1; + malloc_info heapinfo_temp2; simgrid::mc::HeapLocationPairs current; if (previous == nullptr) { @@ -1015,22 +832,22 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, // If either block is a stack block: if (is_block_stack((int) block1) && is_block_stack((int) block2)) { - previous->insert(simgrid::mc::makeHeapLocationPair(block1, -1, block2, -1)); + previous->insert(HeapLocationPair{{HeapLocation(block1, -1), HeapLocation(block2, -1)}}); if (match_pairs) state.match_equals(previous); - return 0; + return false; } // 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)) { - return 1; + return true; } // 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) @@ -1042,27 +859,27 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, // Find type_size: if (type->type == DW_TAG_pointer_type || - (type->type == DW_TAG_base_type && !type->name.empty() && type->name == "char")) + (type->type == DW_TAG_base_type && not type->name.empty() && type->name == "char")) type_size = -1; else type_size = type->byte_size; } - mc_mem_region_t heap_region1 = MC_get_heap_region(snapshot1); - mc_mem_region_t heap_region2 = MC_get_heap_region(snapshot2); + simgrid::mc::Region* heap_region1 = MC_get_heap_region(snapshot1); + simgrid::mc::Region* heap_region2 = MC_get_heap_region(snapshot2); - const malloc_info* heapinfo1 = (const malloc_info*) MC_region_read( - heap_region1, &heapinfo_temp1, &heapinfos1[block1], sizeof(malloc_info)); - const malloc_info* heapinfo2 = (const malloc_info*) MC_region_read( - heap_region2, &heapinfo_temp2, &heapinfos2[block2], sizeof(malloc_info)); + const malloc_info* heapinfo1 = + (const malloc_info*)heap_region1->read(&heapinfo_temp1, &heapinfos1[block1], sizeof(malloc_info)); + const malloc_info* heapinfo2 = + (const malloc_info*)heap_region2->read(&heapinfo_temp2, &heapinfos2[block2], sizeof(malloc_info)); 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); - return 0; + return false; } if (heapinfo1->type == MMALLOC_TYPE_UNFRAGMENTED && heapinfo2->type == MMALLOC_TYPE_UNFRAGMENTED) { @@ -1070,34 +887,29 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, // 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 (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; + return false; } - 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); - return -1; - } + 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) + state.match_equals(previous); + return false; } - 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 (heapinfo1->busy_block.size != heapinfo2->busy_block.size || + heapinfo1->busy_block.busy_size != heapinfo2->busy_block.busy_size) + return true; - if (!previous->insert(simgrid::mc::makeHeapLocationPair(block1, -1, block2, -1)).second) { + if (not previous->insert(HeapLocationPair{{HeapLocation(block1, -1), HeapLocation(block2, -1)}}).second) { if (match_pairs) state.match_equals(previous); - return 0; + return false; } size = heapinfo1->busy_block.busy_size; @@ -1112,12 +924,9 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, if (size <= 0) { if (match_pairs) state.match_equals(previous); - return 0; + return false; } - frag1 = -1; - frag2 = -1; - if (heapinfo1->busy_block.ignore > 0 && heapinfo2->busy_block.ignore == heapinfo1->busy_block.ignore) check_ignore = heapinfo1->busy_block.ignore; @@ -1125,52 +934,51 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, } 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; + 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: - real_addr_frag1 = (void*)((char*)real_addr_block1 + (frag1 << heapinfo1->type)); - real_addr_frag2 = (void*)((char*)real_addr_block2 + (frag2 << 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); - return -1; + return false; } // ? if (type_size != heapinfo1->busy_frag.frag_size[frag1] || type_size != heapinfo2->busy_frag.frag_size[frag2]) { if (match_pairs) state.match_equals(previous); - return -1; + return false; } } // 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); - 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 false; } // Compare the size of both fragments: if (heapinfo1->busy_frag.frag_size[frag1] != heapinfo2->busy_frag.frag_size[frag2]) { if (type_size == -1) { if (match_pairs) state.match_equals(previous); - return -1; + return false; } else - return 1; + return true; } - // 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; if (type != nullptr && area2 == real_addr_frag2) @@ -1178,8 +986,7 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, // 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) { @@ -1188,24 +995,18 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, offset2 = (char*)area2 - (char*)real_addr_frag2; 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); - new_type2 = - get_offset_type(real_addr_frag2, state.types2_(block2, frag2), offset1, size, snapshot2, process_index); + new_type1 = get_offset_type(real_addr_frag1, state.types1_(block1, frag1), offset1, size, snapshot1); + new_type2 = get_offset_type(real_addr_frag2, state.types2_(block2, frag2), offset1, size, snapshot2); } else if (state.types1_(block1, frag1) != nullptr) { - new_type1 = - 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); + new_type1 = get_offset_type(real_addr_frag1, state.types1_(block1, frag1), offset1, size, snapshot1); + new_type2 = get_offset_type(real_addr_frag2, state.types1_(block1, frag1), offset2, size, snapshot2); } else if (state.types2_(block2, frag2) != nullptr) { - new_type1 = - 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); + new_type1 = get_offset_type(real_addr_frag1, state.types2_(block2, frag2), offset1, size, snapshot1); + new_type2 = get_offset_type(real_addr_frag2, state.types2_(block2, frag2), offset2, size, snapshot2); } else { if (match_pairs) state.match_equals(previous); - return -1; + return false; } if (new_type1 != nullptr && new_type2 != nullptr && new_type1 != new_type2) { @@ -1223,7 +1024,7 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, } else { if (match_pairs) state.match_equals(previous); - return -1; + return false; } } @@ -1233,16 +1034,16 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, } if (offset1 == 0 && offset2 == 0 && - !previous->insert(simgrid::mc::makeHeapLocationPair(block1, frag1, block2, frag2)).second) { + not previous->insert(HeapLocationPair{{HeapLocation(block1, frag1), HeapLocation(block2, frag2)}}).second) { if (match_pairs) state.match_equals(previous); - return 0; + return false; } if (size <= 0) { if (match_pairs) state.match_equals(previous); - return 0; + return false; } if ((heapinfo1->busy_frag.ignore[frag1] > 0) && @@ -1250,23 +1051,19 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, check_ignore = heapinfo1->busy_frag.ignore[frag1]; } else - return 1; - + return true; /* Start comparison */ - if (type) - 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); - - if (res_compare == 1) - return res_compare; + bool differ = + type ? heap_area_differ_with_type(state, area1, area2, snapshot1, snapshot2, previous, type, size, check_ignore, + pointer_level) + : heap_area_differ_without_type(state, area1, area2, snapshot1, snapshot2, previous, size, check_ignore); + if (differ) + return true; if (match_pairs) state.match_equals(previous); - return 0; + return false; } } @@ -1275,199 +1072,143 @@ int compare_heap_area(simgrid::mc::StateComparator& state, int process_index, /************************** Snapshot comparison *******************************/ /******************************************************************************/ -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) +static bool areas_differ_with_type(simgrid::mc::StateComparator& state, const void* real_area1, + simgrid::mc::Snapshot* snapshot1, simgrid::mc::Region* region1, + const void* real_area2, simgrid::mc::Snapshot* snapshot2, + simgrid::mc::Region* region2, simgrid::mc::Type* type, int pointer_level) { - simgrid::mc::Process* process = &mc_model_checker->process(); - simgrid::mc::Type* subtype; simgrid::mc::Type* subsubtype; int elm_size; int i; - int res; - top: + xbt_assert(type != nullptr); 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; + return true; 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: + return MC_snapshot_region_memcmp(real_area1, region1, real_area2, region2, type->byte_size) != 0; 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; + case DW_TAG_const_type: + return areas_differ_with_type(state, real_area1, snapshot1, region1, real_area2, snapshot2, region2, + type->subtype, pointer_level); + case DW_TAG_array_type: + subtype = type->subtype; + switch (subtype->type) { + case DW_TAG_unspecified_type: + return true; + + 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 false; + } + for (i = 0; i < type->element_count; i++) { + size_t off = i * elm_size; + if (areas_differ_with_type(state, (char*)real_area1 + off, snapshot1, region1, (char*)real_area2 + off, + snapshot2, region2, type->subtype, pointer_level)) + return true; + } 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); + case DW_TAG_pointer_type: + case DW_TAG_reference_type: + case DW_TAG_rvalue_reference_type: { + const void* addr_pointed1 = MC_region_read_pointer(region1, real_area1); + const 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; + if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) + return (addr_pointed1 != addr_pointed2); + if (addr_pointed1 == nullptr && addr_pointed2 == nullptr) + return false; + if (addr_pointed1 == nullptr || addr_pointed2 == nullptr) + return true; + if (not state.compared_pointers.insert(std::make_pair(addr_pointed1, addr_pointed2)).second) + return false; - pointer_level++; + 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 (! - (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); - } + // * 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 - // 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) + if (is_on_heap(addr_pointed1)) { + if (not is_on_heap(addr_pointed2)) + return true; + // The pointers are both in the heap: + return simgrid::mc::heap_area_differ(state, 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 true; + 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); - } + return areas_differ_with_type(state, 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. + // 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; + } } - break; - case DW_TAG_subroutine_type: - return -1; - break; - default: - XBT_VERB("Unknown case: %d", type->type); - 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); + void* member2 = simgrid::dwarf::resolve_member(real_area2, type, &member, snapshot2); + simgrid::mc::Region* subregion1 = snapshot1->get_region(member1, region1); // region1 is hinted + simgrid::mc::Region* subregion2 = snapshot2->get_region(member2, region2); // region2 is hinted + if (areas_differ_with_type(state, member1, snapshot1, subregion1, member2, snapshot2, subregion2, member.type, + pointer_level)) + return true; + } + break; + case DW_TAG_subroutine_type: + return false; + default: + XBT_VERB("Unknown case: %d", type->type); + break; } - return 0; + return false; } -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) +static bool global_variables_differ(simgrid::mc::StateComparator& state, simgrid::mc::ObjectInformation* object_info, + simgrid::mc::Region* r1, simgrid::mc::Region* r2, simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2) { xbt_assert(r1 && r2, "Missing region."); -#if HAVE_SMPI - if (r1->storage_type() == simgrid::mc::StorageType::Privatized) { - xbt_assert(process_index >= 0); - if (r2->storage_type() != simgrid::mc::StorageType::Privatized) - return 1; - - size_t process_count = MC_smpi_process_count(); - xbt_assert(process_count == r1->privatized_data().size() - && process_count == r2->privatized_data().size()); - - // Compare the global variables separately for each simulates process: - for (size_t process_index = 0; process_index < process_count; process_index++) { - 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; - } -#else - xbt_assert(r1->storage_type() != simgrid::mc::StorageType::Privatized); -#endif - xbt_assert(r2->storage_type() != simgrid::mc::StorageType::Privatized); - 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 @@ -1477,263 +1218,141 @@ static int compare_global_variables( continue; simgrid::mc::Type* bvariable_type = current_var.type; - int res = compare_areas_with_type(state, process_index, - (char *) current_var.address, snapshot1, r1, - (char *) current_var.address, snapshot2, r2, - bvariable_type, 0); - if (res == 1) { + if (areas_differ_with_type(state, (char*)current_var.address, snapshot1, r1, (char*)current_var.address, snapshot2, + r2, bvariable_type, 0)) { XBT_VERB("Global variable %s (%p) is different between snapshots", current_var.name.c_str(), (char *) current_var.address); - return 1; + return true; } - } - return 0; - + return false; } -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, +static bool local_variables_differ(simgrid::mc::StateComparator& state, simgrid::mc::Snapshot* snapshot1, + simgrid::mc::Snapshot* snapshot2, mc_snapshot_stack_t stack1, mc_snapshot_stack_t stack2) { if (stack1->local_variables.size() != stack2->local_variables.size()) { XBT_VERB("Different number of local variables"); - return 1; + return true; } - unsigned int cursor = 0; - local_variable_t current_var1, current_var2; - int res; - while (cursor < stack1->local_variables.size()) { - current_var1 = &stack1->local_variables[cursor]; - current_var2 = &stack1->local_variables[cursor]; - if (current_var1->name != current_var2->name - || current_var1->subprogram != current_var2->subprogram - || current_var1->ip != current_var2->ip) { - // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram - XBT_VERB - ("Different name of variable (%s - %s) " - "or frame (%s - %s) or ip (%lu - %lu)", - current_var1->name.c_str(), - current_var2->name.c_str(), - current_var1->subprogram->name.c_str(), - current_var2->subprogram->name.c_str(), - current_var1->ip, current_var2->ip); - return 1; - } + for (unsigned int cursor = 0; cursor < stack1->local_variables.size(); cursor++) { + local_variable_t current_var1 = &stack1->local_variables[cursor]; + local_variable_t current_var2 = &stack2->local_variables[cursor]; + if (current_var1->name != current_var2->name || current_var1->subprogram != current_var2->subprogram || + current_var1->ip != current_var2->ip) { // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram + XBT_VERB("Different name of variable (%s - %s) " + "or frame (%s - %s) or ip (%lu - %lu)", + current_var1->name.c_str(), current_var2->name.c_str(), current_var1->subprogram->name.c_str(), + current_var2->subprogram->name.c_str(), current_var1->ip, current_var2->ip); + return true; + } - 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; - } - cursor++; + if (areas_differ_with_type(state, current_var1->address, snapshot1, snapshot1->get_region(current_var1->address), + current_var2->address, snapshot2, snapshot2->get_region(current_var2->address), + current_var1->type, 0)) { + 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 true; } - return 0; + } + return false; } 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) +bool snapshot_equal(Snapshot* s1, Snapshot* s2) { // TODO, make this a field of ModelChecker or something similar + static StateComparator state_comparator; + + const RemoteClient& process = mc_model_checker->process(); - if (state_comparator == nullptr) - state_comparator = std::unique_ptr(new StateComparator()); - else - state_comparator->clear(); - - simgrid::mc::Process* process = &mc_model_checker->process(); - - int errors = 0; - - 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); -#ifndef MC_DEBUG - return 1; -#endif - } else - XBT_VERB("(%d - %d) Same hash: 0x%" PRIx64, num1, num2, s1->hash); + if (s1->hash_ != s2->hash_) { + XBT_VERB("(%d - %d) Different hash: 0x%" PRIx64 "--0x%" PRIx64, s1->num_state_, s2->num_state_, s1->hash_, + s2->hash_); + return false; } + XBT_VERB("(%d - %d) Same hash: 0x%" PRIx64, s1->num_state_, s2->num_state_, s1->hash_); /* Compare enabled processes */ - if (s1->enabled_processes != s2->enabled_processes) { - XBT_VERB("(%d - %d) Different amount of enabled processes", num1, num2); - return 1; + if (s1->enabled_processes_ != s2->enabled_processes_) { + XBT_VERB("(%d - %d) Different amount of enabled processes", s1->num_state_, s2->num_state_); + return false; } /* Compare size of stacks */ - 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]; + 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); - 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); -#endif - return 1; -#endif + XBT_VERB("(%d - %d) Different size used in stacks: %zu - %zu", s1->num_state_, s2->num_state_, size_used1, + size_used2); + return false; } } - 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( - alloca(sizeof(struct mdesc)), sizeof(struct mdesc), - remote(process->heap_address), - simgrid::mc::ProcessIndexMissing, simgrid::mc::ReadOptions::lazy()); - xbt_mheap_t heap2 = (xbt_mheap_t)s2->read_bytes( - alloca(sizeof(struct mdesc)), sizeof(struct mdesc), - remote(process->heap_address), - simgrid::mc::ProcessIndexMissing, simgrid::mc::ReadOptions::lazy()); - 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); - errors++; -#else -#ifdef MC_VERBOSE - XBT_VERB("(%d - %d) Different heap information", num1, num2); -#endif - - return 1; -#endif + xbt_mheap_t heap1 = (xbt_mheap_t)s1->read_bytes(alloca(sizeof(struct mdesc)), sizeof(struct mdesc), + remote(process.heap_address), simgrid::mc::ReadOptions::lazy()); + xbt_mheap_t heap2 = (xbt_mheap_t)s2->read_bytes(alloca(sizeof(struct mdesc)), sizeof(struct mdesc), + remote(process.heap_address), simgrid::mc::ReadOptions::lazy()); + if (state_comparator.initHeapInformation(heap1, heap2, &s1->to_ignore_, &s2->to_ignore_) == -1) { + XBT_VERB("(%d - %d) Different heap information", s1->num_state_, s2->num_state_); + return false; } /* Stacks comparison */ - int diff_local = 0; - 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(*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); -#endif - - return 1; -#endif + 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 (local_variables_differ(state_comparator, s1, s2, stack1, stack2)) { + XBT_VERB("(%d - %d) Different local variables between stacks %u", s1->num_state_, s2->num_state_, cursor + 1); + return false; } } - size_t regions_count = s1->snapshot_regions.size(); - // TODO, raise a difference instead? - xbt_assert(regions_count == s2->snapshot_regions.size()); + size_t regions_count = s1->snapshot_regions_.size(); + if (regions_count != s2->snapshot_regions_.size()) + return false; for (size_t k = 0; k != regions_count; ++k) { - mc_mem_region_t region1 = s1->snapshot_regions[k].get(); - mc_mem_region_t region2 = s2->snapshot_regions[k].get(); + Region* region1 = s1->snapshot_regions_[k].get(); + Region* region2 = s2->snapshot_regions_[k].get(); // Preconditions: - if (region1->region_type() != simgrid::mc::RegionType::Data) + if (region1->region_type() != RegionType::Data) continue; xbt_assert(region1->region_type() == region2->region_type()); xbt_assert(region1->object_info() == region2->object_info()); xbt_assert(region1->object_info()); - std::string const& name = region1->object_info()->file_name; - /* Compare global variables */ - if (compare_global_variables(*state_comparator, region1->object_info(), simgrid::mc::ProcessIndexDisabled, region1, - region2, s1, s2)) { - -#ifdef MC_DEBUG - XBT_DEBUG("(%d - %d) Different global variables in %s", - num1, num2, name.c_str()); - errors++; -#else -#ifdef MC_VERBOSE - XBT_VERB("(%d - %d) Different global variables in %s", - num1, num2, name.c_str()); -#endif - - return 1; -#endif + if (global_variables_differ(state_comparator, region1->object_info(), region1, region2, s1, s2)) { + std::string const& name = region1->object_info()->file_name; + XBT_VERB("(%d - %d) Different global variables in %s", s1->num_state_, s2->num_state_, name.c_str()); + return false; } } /* Compare heap */ - if (simgrid::mc::mmalloc_compare_heap(*state_comparator, s1, s2) > 0) { - -#ifdef MC_DEBUG - XBT_DEBUG("(%d - %d) Different heap (mmalloc_compare)", num1, num2); - errors++; -#else - -#ifdef MC_VERBOSE - XBT_VERB("(%d - %d) Different heap (mmalloc_compare)", num1, num2); -#endif - return 1; -#endif + if (mmalloc_heap_differ(state_comparator, s1, s2)) { + XBT_VERB("(%d - %d) Different heap (mmalloc_compare)", s1->num_state_, s2->num_state_); + return false; } -#ifdef MC_VERBOSE - if (errors || hash_result) - XBT_VERB("(%d - %d) Difference found", num1, num2); - else - XBT_VERB("(%d - %d) No difference found", num1, num2); -#endif - -#if defined(MC_DEBUG) && defined(MC_VERBOSE) - if (_sg_mc_hash) { - // * false positive SHOULD be avoided. - // * 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"); - } -#endif + XBT_VERB("(%d - %d) No difference found", s1->num_state_, s2->num_state_); - return errors > 0 || hash_result; + return true; } }