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Diffstat (limited to 'contrib/compiler-rt/lib/tsan/tests/unit/tsan_stack_test.cc')
-rw-r--r-- | contrib/compiler-rt/lib/tsan/tests/unit/tsan_stack_test.cc | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/tsan/tests/unit/tsan_stack_test.cc b/contrib/compiler-rt/lib/tsan/tests/unit/tsan_stack_test.cc new file mode 100644 index 000000000000..92e035d8d000 --- /dev/null +++ b/contrib/compiler-rt/lib/tsan/tests/unit/tsan_stack_test.cc @@ -0,0 +1,95 @@ +//===-- tsan_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 ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "tsan_sync.h" +#include "tsan_rtl.h" +#include "gtest/gtest.h" +#include <string.h> + +namespace __tsan { + +template <typename StackTraceTy> +static void TestStackTrace(StackTraceTy *trace) { + ThreadState thr(0, 0, 0, 0, 0, 0, 0, 0, 0); + uptr stack[128]; + thr.shadow_stack = &stack[0]; + thr.shadow_stack_pos = &stack[0]; + thr.shadow_stack_end = &stack[128]; + + ObtainCurrentStack(&thr, 0, trace); + EXPECT_EQ(0U, trace->size); + + ObtainCurrentStack(&thr, 42, trace); + EXPECT_EQ(1U, trace->size); + EXPECT_EQ(42U, trace->trace[0]); + + *thr.shadow_stack_pos++ = 100; + *thr.shadow_stack_pos++ = 101; + ObtainCurrentStack(&thr, 0, trace); + EXPECT_EQ(2U, trace->size); + EXPECT_EQ(100U, trace->trace[0]); + EXPECT_EQ(101U, trace->trace[1]); + + ObtainCurrentStack(&thr, 42, trace); + EXPECT_EQ(3U, trace->size); + EXPECT_EQ(100U, trace->trace[0]); + EXPECT_EQ(101U, trace->trace[1]); + EXPECT_EQ(42U, trace->trace[2]); +} + +template<typename StackTraceTy> +static void TestTrim(StackTraceTy *trace) { + ThreadState thr(0, 0, 0, 0, 0, 0, 0, 0, 0); + const uptr kShadowStackSize = 2 * kStackTraceMax; + uptr stack[kShadowStackSize]; + thr.shadow_stack = &stack[0]; + thr.shadow_stack_pos = &stack[0]; + thr.shadow_stack_end = &stack[kShadowStackSize]; + + for (uptr i = 0; i < kShadowStackSize; ++i) + *thr.shadow_stack_pos++ = 100 + i; + + ObtainCurrentStack(&thr, 0, trace); + EXPECT_EQ(kStackTraceMax, trace->size); + for (uptr i = 0; i < kStackTraceMax; i++) { + EXPECT_EQ(100 + kStackTraceMax + i, trace->trace[i]); + } + + ObtainCurrentStack(&thr, 42, trace); + EXPECT_EQ(kStackTraceMax, trace->size); + for (uptr i = 0; i < kStackTraceMax - 1; i++) { + EXPECT_EQ(101 + kStackTraceMax + i, trace->trace[i]); + } + EXPECT_EQ(42U, trace->trace[kStackTraceMax - 1]); +} + +TEST(StackTrace, BasicVarSize) { + VarSizeStackTrace trace; + TestStackTrace(&trace); +} + +TEST(StackTrace, BasicBuffered) { + BufferedStackTrace trace; + TestStackTrace(&trace); +} + +TEST(StackTrace, TrimVarSize) { + VarSizeStackTrace trace; + TestTrim(&trace); +} + +TEST(StackTrace, TrimBuffered) { + BufferedStackTrace trace; + TestTrim(&trace); +} + +} // namespace __tsan |