| //===-- asan_fake_stack_test.cc -------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of AddressSanitizer, an address sanity checker. |
| // |
| // Tests for FakeStack. |
| // This test file should be compiled w/o asan instrumentation. |
| //===----------------------------------------------------------------------===// |
| |
| #include "asan_fake_stack.h" |
| #include "asan_test_utils.h" |
| #include "sanitizer_common/sanitizer_common.h" |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| #include <set> |
| |
| namespace __asan { |
| |
| TEST(FakeStack, FlagsSize) { |
| EXPECT_EQ(FakeStack::SizeRequiredForFlags(10), 1 << 5); |
| EXPECT_EQ(FakeStack::SizeRequiredForFlags(11), 1 << 6); |
| EXPECT_EQ(FakeStack::SizeRequiredForFlags(20), 1 << 15); |
| } |
| |
| TEST(FakeStack, RequiredSize) { |
| // for (int i = 15; i < 20; i++) { |
| // uptr alloc_size = FakeStack::RequiredSize(i); |
| // printf("%zdK ==> %zd\n", 1 << (i - 10), alloc_size); |
| // } |
| EXPECT_EQ(FakeStack::RequiredSize(15), 365568); |
| EXPECT_EQ(FakeStack::RequiredSize(16), 727040); |
| EXPECT_EQ(FakeStack::RequiredSize(17), 1449984); |
| EXPECT_EQ(FakeStack::RequiredSize(18), 2895872); |
| EXPECT_EQ(FakeStack::RequiredSize(19), 5787648); |
| } |
| |
| TEST(FakeStack, FlagsOffset) { |
| for (uptr stack_size_log = 15; stack_size_log <= 20; stack_size_log++) { |
| uptr stack_size = 1UL << stack_size_log; |
| uptr offset = 0; |
| for (uptr class_id = 0; class_id < FakeStack::kNumberOfSizeClasses; |
| class_id++) { |
| uptr frame_size = FakeStack::BytesInSizeClass(class_id); |
| uptr num_flags = stack_size / frame_size; |
| EXPECT_EQ(offset, FakeStack::FlagsOffset(stack_size_log, class_id)); |
| // printf("%zd: %zd => %zd %zd\n", stack_size_log, class_id, offset, |
| // FakeStack::FlagsOffset(stack_size_log, class_id)); |
| offset += num_flags; |
| } |
| } |
| } |
| |
| TEST(FakeStack, CreateDestroy) { |
| for (int i = 0; i < 1000; i++) { |
| for (uptr stack_size_log = 20; stack_size_log <= 22; stack_size_log++) { |
| FakeStack *fake_stack = FakeStack::Create(stack_size_log); |
| fake_stack->Destroy(); |
| } |
| } |
| } |
| |
| TEST(FakeStack, ModuloNumberOfFrames) { |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, 0), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, (1<<15)), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, (1<<10)), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, (1<<9)), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, (1<<8)), 1<<8); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 0, (1<<15) + 1), 1); |
| |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 1, 0), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 1, 1<<9), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 1, 1<<8), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 1, 1<<7), 1<<7); |
| |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 5, 0), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 5, 1), 1); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 5, 15), 15); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 5, 16), 0); |
| EXPECT_EQ(FakeStack::ModuloNumberOfFrames(15, 5, 17), 1); |
| } |
| |
| TEST(FakeStack, GetFrame) { |
| const uptr stack_size_log = 20; |
| const uptr stack_size = 1 << stack_size_log; |
| FakeStack *fs = FakeStack::Create(stack_size_log); |
| u8 *base = fs->GetFrame(stack_size_log, 0, 0); |
| EXPECT_EQ(base, reinterpret_cast<u8 *>(fs) + |
| fs->SizeRequiredForFlags(stack_size_log) + 4096); |
| EXPECT_EQ(base + 0*stack_size + 64 * 7, fs->GetFrame(stack_size_log, 0, 7)); |
| EXPECT_EQ(base + 1*stack_size + 128 * 3, fs->GetFrame(stack_size_log, 1, 3)); |
| EXPECT_EQ(base + 2*stack_size + 256 * 5, fs->GetFrame(stack_size_log, 2, 5)); |
| fs->Destroy(); |
| } |
| |
| TEST(FakeStack, Allocate) { |
| const uptr stack_size_log = 19; |
| FakeStack *fs = FakeStack::Create(stack_size_log); |
| std::set<FakeFrame *> s; |
| for (int iter = 0; iter < 2; iter++) { |
| s.clear(); |
| for (uptr cid = 0; cid < FakeStack::kNumberOfSizeClasses; cid++) { |
| uptr n = FakeStack::NumberOfFrames(stack_size_log, cid); |
| uptr bytes_in_class = FakeStack::BytesInSizeClass(cid); |
| for (uptr j = 0; j < n; j++) { |
| FakeFrame *ff = fs->Allocate(stack_size_log, cid, 0); |
| uptr x = reinterpret_cast<uptr>(ff); |
| EXPECT_TRUE(s.insert(ff).second); |
| EXPECT_EQ(x, fs->AddrIsInFakeStack(x)); |
| EXPECT_EQ(x, fs->AddrIsInFakeStack(x + 1)); |
| EXPECT_EQ(x, fs->AddrIsInFakeStack(x + bytes_in_class - 1)); |
| EXPECT_NE(x, fs->AddrIsInFakeStack(x + bytes_in_class)); |
| } |
| if (iter == 0 && |
| (cid == 0 || cid == FakeStack::kNumberOfSizeClasses - 1)) { |
| // This is slow, so we do it only sometimes. |
| EXPECT_DEATH(fs->Allocate(stack_size_log, cid, 0), |
| "Failed to allocate a fake stack frame"); |
| } |
| } |
| for (std::set<FakeFrame *>::iterator it = s.begin(); it != s.end(); ++it) { |
| FakeFrame *ff = *it; |
| fs->Deallocate(ff, stack_size_log, ff->class_id, 0); |
| } |
| } |
| fs->Destroy(); |
| } |
| |
| static void RecursiveFunction(FakeStack *fs, int depth) { |
| uptr class_id = depth / 3; |
| FakeFrame *ff = fs->Allocate(fs->stack_size_log(), class_id, 0); |
| if (depth) { |
| RecursiveFunction(fs, depth - 1); |
| RecursiveFunction(fs, depth - 1); |
| } |
| fs->Deallocate(ff, fs->stack_size_log(), class_id, 0); |
| } |
| |
| TEST(FakeStack, RecursiveStressTest) { |
| const uptr stack_size_log = 16; |
| FakeStack *fs = FakeStack::Create(stack_size_log); |
| RecursiveFunction(fs, 22); // with 26 runs for 2-3 seconds. |
| fs->Destroy(); |
| } |
| |
| } // namespace __asan |