131 lines
5.8 KiB
C++
131 lines
5.8 KiB
C++
/*
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* Copyright (c) 2023, Red Hat, Inc. and/or its affiliates.
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* Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "precompiled.hpp"
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#include "memory/allocation.hpp"
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#include "nmt/mallocHeader.inline.hpp"
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#include "nmt/memTracker.hpp"
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#include "runtime/os.hpp"
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#include "sanitizers/address.hpp"
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#include "unittest.hpp"
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// Uncomment to get test output
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//#define LOG_PLEASE
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#include "testutils.hpp"
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#if !INCLUDE_ASAN
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using ::testing::HasSubstr;
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static void test_pointer(const void* p, bool expected_return_code, const char* expected_message) {
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stringStream ss;
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const bool b = MemTracker::print_containing_region(p, &ss);
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LOG_HERE("MemTracker::print_containing_region(" PTR_FORMAT ") yielded: %d \"%s\"", p2i(p), b, ss.base());
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EXPECT_EQ(b, expected_return_code);
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if (b) {
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EXPECT_THAT(ss.base(), HasSubstr(expected_message));
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}
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}
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static void test_for_live_c_heap_block(size_t sz, ssize_t offset) {
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char* c = NEW_C_HEAP_ARRAY(char, sz, mtTest);
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LOG_HERE("C-block starts " PTR_FORMAT ", size " SIZE_FORMAT ".", p2i(c), sz);
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memset(c, 0, sz);
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if (MemTracker::enabled()) {
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const char* expected_string = "into live malloced block";
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if (offset < 0) {
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expected_string = "into header of live malloced block";
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} else if ((size_t)offset >= sz) {
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expected_string = "just outside of live malloced block";
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}
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test_pointer(c + offset, true, expected_string);
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} else {
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// NMT disabled: we should see nothing.
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test_pointer(c + offset, false, "");
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}
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FREE_C_HEAP_ARRAY(char, c);
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}
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#ifdef LINUX
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static void test_for_dead_c_heap_block(size_t sz, ssize_t offset) {
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if (!MemTracker::enabled()) {
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return;
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}
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char* c = NEW_C_HEAP_ARRAY(char, sz, mtTest);
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LOG_HERE("C-block starts " PTR_FORMAT ", size " SIZE_FORMAT ".", p2i(c), sz);
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memset(c, 0, sz);
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// We cannot just free the allocation to try dead block printing, since the memory
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// may be immediately reused by concurrent code. Instead, we mark the block as dead
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// manually, and revert that before freeing it.
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MallocHeader* const hdr = MallocHeader::resolve_checked(c);
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hdr->mark_block_as_dead();
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const char* expected_string = "into dead malloced block";
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if (offset < 0) {
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expected_string = "into header of dead malloced block";
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} else if ((size_t)offset >= sz) {
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expected_string = "just outside of dead malloced block";
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}
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test_pointer(c + offset, true, expected_string);
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hdr->revive();
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FREE_C_HEAP_ARRAY(char, c);
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}
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#endif
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TEST_VM(NMT, location_printing_cheap_live_1) { test_for_live_c_heap_block(2 * K, 0); } // start of payload
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TEST_VM(NMT, location_printing_cheap_live_2) { test_for_live_c_heap_block(2 * K, -7); } // into header
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TEST_VM(NMT, location_printing_cheap_live_3) { test_for_live_c_heap_block(2 * K, K + 1); } // into payload
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TEST_VM(NMT, location_printing_cheap_live_4) { test_for_live_c_heap_block(2 * K, K + 2); } // into payload (check for even/odd errors)
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TEST_VM(NMT, location_printing_cheap_live_5) { test_for_live_c_heap_block(2 * K + 1, 2 * K + 2); } // just outside payload
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TEST_VM(NMT, location_printing_cheap_live_6) { test_for_live_c_heap_block(4, 0); } // into a very small block
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TEST_VM(NMT, location_printing_cheap_live_7) { test_for_live_c_heap_block(4, 4); } // just outside a very small block
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#ifdef LINUX
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_1) { test_for_dead_c_heap_block(2 * K, 0); } // start of payload
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_2) { test_for_dead_c_heap_block(2 * K, -7); } // into header
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_3) { test_for_dead_c_heap_block(2 * K, K + 1); } // into payload
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_4) { test_for_dead_c_heap_block(2 * K, K + 2); } // into payload (check for even/odd errors)
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_5) { test_for_dead_c_heap_block(2 * K + 1, 2 * K + 2); } // just outside payload
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_6) { test_for_dead_c_heap_block(4, 0); } // into a very small block
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TEST_VM(NMT, DISABLED_location_printing_cheap_dead_7) { test_for_dead_c_heap_block(4, 4); } // just outside a very small block
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#endif
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static void test_for_mmap(size_t sz, ssize_t offset) {
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char* addr = os::reserve_memory(sz, false, mtTest);
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if (MemTracker::enabled()) {
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test_pointer(addr + offset, true, "in mmap'd memory region");
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} else {
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// NMT disabled: we should see nothing.
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test_pointer(addr + offset, false, "");
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}
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os::release_memory(addr, os::vm_page_size());
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}
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TEST_VM(NMT, location_printing_mmap_1) { test_for_mmap(os::vm_page_size(), 0); }
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TEST_VM(NMT, location_printing_mmap_2) { test_for_mmap(os::vm_page_size(), os::vm_page_size() - 1); }
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#endif // !INCLUDE_ASAN
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