ed7f3f5bc9
Currently the shadow stack is located in the trace memory mapping. The new tsan runtime will remove the trace memory mapping. Move the shadow stack into ThreadState as a preparation step. Reviewed By: melver Differential Revision: https://reviews.llvm.org/D110519
86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
//===-- tsan_stack_test.cpp -----------------------------------------------===//
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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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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#include "tsan_sync.h"
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#include "tsan_rtl.h"
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#include "gtest/gtest.h"
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#include <string.h>
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namespace __tsan {
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template <typename StackTraceTy>
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static void TestStackTrace(StackTraceTy *trace) {
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ThreadState thr(0, 0, 0, 0, 0, 0, 0, 0, 0);
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ObtainCurrentStack(&thr, 0, trace);
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EXPECT_EQ(0U, trace->size);
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ObtainCurrentStack(&thr, 42, trace);
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EXPECT_EQ(1U, trace->size);
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EXPECT_EQ(42U, trace->trace[0]);
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*thr.shadow_stack_pos++ = 100;
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*thr.shadow_stack_pos++ = 101;
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ObtainCurrentStack(&thr, 0, trace);
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EXPECT_EQ(2U, trace->size);
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EXPECT_EQ(100U, trace->trace[0]);
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EXPECT_EQ(101U, trace->trace[1]);
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ObtainCurrentStack(&thr, 42, trace);
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EXPECT_EQ(3U, trace->size);
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EXPECT_EQ(100U, trace->trace[0]);
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EXPECT_EQ(101U, trace->trace[1]);
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EXPECT_EQ(42U, trace->trace[2]);
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}
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template<typename StackTraceTy>
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static void TestTrim(StackTraceTy *trace) {
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ThreadState thr(0, 0, 0, 0, 0, 0, 0, 0, 0);
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for (uptr i = 0; i < 2 * kStackTraceMax; ++i)
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*thr.shadow_stack_pos++ = 100 + i;
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ObtainCurrentStack(&thr, 0, trace);
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EXPECT_EQ(kStackTraceMax, trace->size);
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for (uptr i = 0; i < kStackTraceMax; i++) {
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EXPECT_EQ(100 + kStackTraceMax + i, trace->trace[i]);
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}
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ObtainCurrentStack(&thr, 42, trace);
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EXPECT_EQ(kStackTraceMax, trace->size);
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for (uptr i = 0; i < kStackTraceMax - 1; i++) {
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EXPECT_EQ(101 + kStackTraceMax + i, trace->trace[i]);
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}
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EXPECT_EQ(42U, trace->trace[kStackTraceMax - 1]);
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}
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TEST(StackTrace, BasicVarSize) {
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VarSizeStackTrace trace;
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TestStackTrace(&trace);
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}
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TEST(StackTrace, BasicBuffered) {
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BufferedStackTrace trace;
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TestStackTrace(&trace);
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}
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TEST(StackTrace, TrimVarSize) {
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VarSizeStackTrace trace;
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TestTrim(&trace);
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}
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TEST(StackTrace, TrimBuffered) {
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BufferedStackTrace trace;
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TestTrim(&trace);
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}
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} // namespace __tsan
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