55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//===-- never_allocated.cpp -------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <string>
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#include "gwp_asan/common.h"
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#include "gwp_asan/crash_handler.h"
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#include "gwp_asan/tests/harness.h"
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TEST_P(BacktraceGuardedPoolAllocatorDeathTest, NeverAllocated) {
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SCOPED_TRACE("");
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void *Ptr = GPA.allocate(0x1000);
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GPA.deallocate(Ptr);
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std::string DeathNeedle =
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"GWP-ASan cannot provide any more information about this error";
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// Trigger a guard page in a completely different slot that's never allocated.
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// Previously, there was a bug that this would result in nullptr-dereference
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// in the posix crash handler.
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char *volatile NeverAllocatedPtr = static_cast<char *>(Ptr) + 0x3000;
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if (!Recoverable) {
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EXPECT_DEATH(*NeverAllocatedPtr = 0, DeathNeedle);
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return;
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}
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*NeverAllocatedPtr = 0;
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CheckOnlyOneGwpAsanCrash(GetOutputBuffer());
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ASSERT_NE(std::string::npos, GetOutputBuffer().find(DeathNeedle));
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// Check that subsequent invalid touches of the pool don't print a report.
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GetOutputBuffer().clear();
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for (size_t i = 0; i < 100; ++i) {
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*NeverAllocatedPtr = 0;
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*(NeverAllocatedPtr + 0x2000) = 0;
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*(NeverAllocatedPtr + 0x3000) = 0;
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ASSERT_TRUE(GetOutputBuffer().empty());
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}
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// Check that reports on the other slots still report a double-free, but only
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// once.
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GetOutputBuffer().clear();
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GPA.deallocate(Ptr);
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ASSERT_NE(std::string::npos, GetOutputBuffer().find("Double Free"));
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GetOutputBuffer().clear();
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for (size_t i = 0; i < 100; ++i) {
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DeallocateMemory(GPA, Ptr);
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ASSERT_TRUE(GetOutputBuffer().empty());
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}
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}
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