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"
7 #include "src/mc/mc_config.hpp"
8 #include "src/mc/sosp/mc_snapshot.hpp"
14 /**************** Class BOOST_tests *************************/
15 using simgrid::mc::RegionSnapshot;
16 class snap_test_helper {
18 static void init_memory(void* mem, size_t size);
19 static void Init(bool sparse_ckpt);
24 RegionSnapshot* region0;
25 RegionSnapshot* region;
27 static prologue_return prologue(int n); // common to the below 5 fxs
28 static void read_whole_region();
29 static void read_region_parts();
30 static void compare_whole_region();
31 static void compare_region_parts();
32 static void read_pointer();
36 delete mc_model_checker;
37 mc_model_checker = nullptr;
40 static std::default_random_engine rnd_engine;
41 static bool sparse_checkpoint;
42 static std::unique_ptr<simgrid::mc::RemoteClient> process;
45 // static member variables init.
46 std::default_random_engine snap_test_helper::rnd_engine;
47 bool snap_test_helper::sparse_checkpoint = 0;
48 std::unique_ptr<simgrid::mc::RemoteClient> snap_test_helper::process = nullptr;
50 void snap_test_helper::init_memory(void* mem, size_t size)
52 char* dest = (char*)mem;
53 for (size_t i = 0; i < size; ++i) {
54 dest[i] = rnd_engine() & 255;
58 void snap_test_helper::Init(bool sparse_ckpt)
60 _sg_mc_sparse_checkpoint = sparse_ckpt;
61 REQUIRE(xbt_pagesize == getpagesize());
62 REQUIRE(1 << xbt_pagebits == xbt_pagesize);
64 process.reset(new simgrid::mc::RemoteClient(getpid(), -1));
66 mc_model_checker = new ::simgrid::mc::ModelChecker(std::move(process));
69 snap_test_helper::prologue_return snap_test_helper::prologue(int n)
71 // Store region page(s):
72 size_t byte_size = n * xbt_pagesize;
73 void* source = mmap(nullptr, byte_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
74 INFO("Could not allocate source memory")
75 REQUIRE(source != MAP_FAILED);
77 // Init memory and take snapshots:
78 init_memory(source, byte_size);
79 simgrid::mc::RegionSnapshot* region0 =
80 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, source, source, byte_size);
81 for (int i = 0; i < n; i += 2) {
82 init_memory((char*)source + i * xbt_pagesize, xbt_pagesize);
84 simgrid::mc::RegionSnapshot* region =
85 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, source, source, byte_size);
87 void* destination = mmap(nullptr, byte_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
88 INFO("Could not allocate destination memory");
89 REQUIRE(source != MAP_FAILED);
91 return {.size = byte_size,
94 .region0 = std::move(region0),
95 .region = std::move(region)};
98 void snap_test_helper::read_whole_region()
100 for (int n = 1; n != 32; ++n) {
102 prologue_return ret = prologue(n);
103 const void* read = MC_region_read(ret.region, ret.dstn, ret.src, ret.size);
104 INFO("Mismatch in MC_region_read()");
105 REQUIRE(not memcmp(ret.src, read, ret.size));
107 munmap(ret.dstn, ret.size);
108 munmap(ret.src, ret.size);
114 void snap_test_helper::read_region_parts()
116 for (int n = 1; n != 32; ++n) {
118 prologue_return ret = prologue(n);
120 for (int j = 0; j != 100; ++j) {
121 size_t offset = rnd_engine() % ret.size;
122 size_t size = rnd_engine() % (ret.size - offset);
123 const void* read = MC_region_read(ret.region, ret.dstn, (const char*)ret.src + offset, size);
124 INFO("Mismatch in MC_region_read()");
125 REQUIRE(not memcmp((char*)ret.src + offset, read, size));
127 munmap(ret.dstn, ret.size);
128 munmap(ret.src, ret.size);
134 void snap_test_helper::compare_whole_region()
136 for (int n = 1; n != 32; ++n) {
138 prologue_return ret = prologue(n);
140 INFO("Unexpected match in MC_snapshot_region_memcmp() with previous snapshot");
141 REQUIRE(MC_snapshot_region_memcmp(ret.src, ret.region0, ret.src, ret.region, ret.size));
143 munmap(ret.dstn, ret.size);
144 munmap(ret.src, ret.size);
150 void snap_test_helper::compare_region_parts()
152 for (int n = 1; n != 32; ++n) {
154 prologue_return ret = prologue(n);
156 for (int j = 0; j != 100; ++j) {
157 size_t offset = rnd_engine() % ret.size;
158 size_t size = rnd_engine() % (ret.size - offset);
160 INFO("Mismatch in MC_snapshot_region_memcmp()");
161 REQUIRE(not MC_snapshot_region_memcmp((char*)ret.src + offset, ret.region, (char*)ret.src + offset, ret.region,
164 munmap(ret.dstn, ret.size);
165 munmap(ret.src, ret.size);
171 void snap_test_helper::read_pointer()
174 prologue_return ret = prologue(1);
175 memcpy(ret.src, &mc_model_checker, sizeof(void*));
176 simgrid::mc::RegionSnapshot* region2 =
177 new simgrid::mc::RegionSparse(simgrid::mc::RegionType::Unknown, ret.src, ret.src, ret.size);
178 INFO("Mismtach in MC_region_read_pointer()");
179 REQUIRE(MC_region_read_pointer(region2, ret.src) == mc_model_checker);
181 munmap(ret.dstn, ret.size);
182 munmap(ret.src, ret.size);
188 /*************** End: class snap_test_helper *****************************/
190 TEST_CASE("MC::Snapshot: A copy/snapshot of a given memory region", "MC::Snapshot")
192 auto sparse = GENERATE(false, true);
195 INFO("Sparse snapshot (using pages)");
197 INFO("Flat snapshot (no pages)");
200 snap_test_helper::Init(sparse);
202 INFO("Read whole region");
203 snap_test_helper::read_whole_region();
205 INFO("Read region parts");
206 snap_test_helper::read_region_parts();
208 INFO("Compare whole region");
209 snap_test_helper::compare_whole_region();
211 INFO("Compare region parts");
212 snap_test_helper::compare_region_parts();
214 INFO("Read pointer");
215 snap_test_helper::read_pointer();
217 snap_test_helper::cleanup();