1 /* Copyright (c) 2014-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/include/catch.hpp"
14 #include "src/mc/mc_config.hpp"
15 #include "src/mc/mc_mmu.hpp"
16 #include "src/mc/mc_private.hpp"
17 #include "src/mc/sosp/mc_snapshot.hpp"
19 /**************** Class BOOST_tests *************************/
20 using simgrid::mc::RegionSnapshot;
21 class snap_test_helper {
23 static void init_memory(void* mem, size_t size);
24 static void Init(bool sparse_ckpt);
29 RegionSnapshot* region0;
30 RegionSnapshot* region;
32 static prologue_return prologue(int n); // common to the below 5 fxs
33 static void read_whole_region();
34 static void read_region_parts();
35 static void compare_whole_region();
36 static void compare_region_parts();
37 static void read_pointer();
41 delete mc_model_checker;
42 mc_model_checker = nullptr;
45 static std::default_random_engine rnd_engine;
46 static bool sparse_checkpoint;
47 static std::unique_ptr<simgrid::mc::RemoteClient> process;
50 // static member variables init.
51 std::default_random_engine snap_test_helper::rnd_engine;
52 bool snap_test_helper::sparse_checkpoint = 0;
53 std::unique_ptr<simgrid::mc::RemoteClient> snap_test_helper::process = nullptr;
55 void snap_test_helper::init_memory(void* mem, size_t size)
57 char* dest = (char*)mem;
58 for (size_t i = 0; i < size; ++i) {
59 dest[i] = rnd_engine() & 255;
63 void snap_test_helper::Init(bool sparse_ckpt)
65 _sg_mc_sparse_checkpoint = sparse_ckpt;
66 REQUIRE(xbt_pagesize == getpagesize());
67 REQUIRE(1 << xbt_pagebits == xbt_pagesize);
69 process.reset(new simgrid::mc::RemoteClient(getpid(), -1));
71 mc_model_checker = new ::simgrid::mc::ModelChecker(std::move(process));
74 snap_test_helper::prologue_return snap_test_helper::prologue(int n)
76 // Store region page(s):
77 size_t byte_size = n * xbt_pagesize;
78 void* source = mmap(nullptr, byte_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
79 INFO("Could not allocate source memory")
80 REQUIRE(source != MAP_FAILED);
82 // Init memory and take snapshots:
83 init_memory(source, byte_size);
84 simgrid::mc::RegionSnapshot* region0 =
85 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, source, source, byte_size);
86 for (int i = 0; i < n; i += 2) {
87 init_memory((char*)source + i * xbt_pagesize, xbt_pagesize);
89 simgrid::mc::RegionSnapshot* region =
90 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, source, source, byte_size);
92 void* destination = mmap(nullptr, byte_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
93 INFO("Could not allocate destination memory");
94 REQUIRE(source != MAP_FAILED);
96 return {.size = byte_size,
99 .region0 = std::move(region0),
100 .region = std::move(region)};
103 void snap_test_helper::read_whole_region()
105 for (int n = 1; n != 32; ++n) {
107 prologue_return ret = prologue(n);
108 const void* read = MC_region_read(ret.region, ret.dstn, ret.src, ret.size);
109 INFO("Mismatch in MC_region_read()");
110 REQUIRE(not memcmp(ret.src, read, ret.size));
112 munmap(ret.dstn, ret.size);
113 munmap(ret.src, ret.size);
119 void snap_test_helper::read_region_parts()
121 for (int n = 1; n != 32; ++n) {
123 prologue_return ret = prologue(n);
125 for (int j = 0; j != 100; ++j) {
126 size_t offset = rnd_engine() % ret.size;
127 size_t size = rnd_engine() % (ret.size - offset);
128 const void* read = MC_region_read(ret.region, ret.dstn, (const char*)ret.src + offset, size);
129 INFO("Mismatch in MC_region_read()");
130 REQUIRE(not memcmp((char*)ret.src + offset, read, size));
132 munmap(ret.dstn, ret.size);
133 munmap(ret.src, ret.size);
139 void snap_test_helper::compare_whole_region()
141 for (int n = 1; n != 32; ++n) {
143 prologue_return ret = prologue(n);
145 INFO("Unexpected match in MC_snapshot_region_memcmp() with previous snapshot");
146 REQUIRE(MC_snapshot_region_memcmp(ret.src, ret.region0, ret.src, ret.region, ret.size));
148 munmap(ret.dstn, ret.size);
149 munmap(ret.src, ret.size);
155 void snap_test_helper::compare_region_parts()
157 for (int n = 1; n != 32; ++n) {
159 prologue_return ret = prologue(n);
161 for (int j = 0; j != 100; ++j) {
162 size_t offset = rnd_engine() % ret.size;
163 size_t size = rnd_engine() % (ret.size - offset);
165 INFO("Mismatch in MC_snapshot_region_memcmp()");
166 REQUIRE(not MC_snapshot_region_memcmp((char*)ret.src + offset, ret.region, (char*)ret.src + offset, ret.region,
169 munmap(ret.dstn, ret.size);
170 munmap(ret.src, ret.size);
176 void snap_test_helper::read_pointer()
179 prologue_return ret = prologue(1);
180 memcpy(ret.src, &mc_model_checker, sizeof(void*));
181 simgrid::mc::RegionSnapshot* region2 =
182 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, ret.src, ret.src, ret.size);
183 INFO("Mismtach in MC_region_read_pointer()");
184 REQUIRE(MC_region_read_pointer(region2, ret.src) == mc_model_checker);
186 munmap(ret.dstn, ret.size);
187 munmap(ret.src, ret.size);
193 /*************** End: class snap_test_helper *****************************/
195 TEST_CASE("MC::Snapshot: A copy/snapshot of a given memory region", "MC::Snapshot")
197 auto sparse = GENERATE(false, true);
200 INFO("Sparse snapshot (using pages)");
202 INFO("Flat snapshot (no pages)");
205 snap_test_helper::Init(sparse);
207 INFO("Read whole region");
208 snap_test_helper::read_whole_region();
210 INFO("Read region parts");
211 snap_test_helper::read_region_parts();
213 INFO("Compare whole region");
214 snap_test_helper::compare_whole_region();
216 INFO("Compare region parts");
217 snap_test_helper::compare_region_parts();
219 INFO("Read pointer");
220 snap_test_helper::read_pointer();
222 snap_test_helper::cleanup();