sanitizer_stacktrace_test.cc [plain text]
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
#include "gtest/gtest.h"
namespace __sanitizer {
class FastUnwindTest : public ::testing::Test {
protected:
virtual void SetUp();
bool TryFastUnwind(uptr max_depth) {
if (!StackTrace::WillUseFastUnwind(true))
return false;
trace.Unwind(max_depth, start_pc, (uptr)&fake_stack[0], fake_top,
fake_bottom, true);
return true;
}
uptr fake_stack[10];
uptr start_pc;
uptr fake_top;
uptr fake_bottom;
StackTrace trace;
};
static uptr PC(uptr idx) {
return (1<<20) + idx;
}
void FastUnwindTest::SetUp() {
for (uptr i = 0; i+1 < ARRAY_SIZE(fake_stack); i += 2) {
fake_stack[i] = (uptr)&fake_stack[i+2]; fake_stack[i+1] = PC(i + 1); }
fake_stack[RoundDownTo(ARRAY_SIZE(fake_stack) - 1, 2)] = 0;
fake_top = (uptr)&fake_stack[ARRAY_SIZE(fake_stack) + 2];
fake_bottom = (uptr)&fake_stack[-1];
start_pc = PC(0);
}
TEST_F(FastUnwindTest, Basic) {
if (!TryFastUnwind(kStackTraceMax))
return;
EXPECT_EQ(6U, trace.size);
EXPECT_EQ(start_pc, trace.trace[0]);
for (uptr i = 1; i <= 5; i++) {
EXPECT_EQ(PC(i*2 - 1), trace.trace[i]);
}
}
TEST_F(FastUnwindTest, FramePointerLoop) {
fake_stack[4] = (uptr)&fake_stack[4];
if (!TryFastUnwind(kStackTraceMax))
return;
EXPECT_EQ(4U, trace.size);
EXPECT_EQ(start_pc, trace.trace[0]);
for (uptr i = 1; i <= 3; i++) {
EXPECT_EQ(PC(i*2 - 1), trace.trace[i]);
}
}
TEST_F(FastUnwindTest, MisalignedFramePointer) {
fake_stack[4] += 3;
if (!TryFastUnwind(kStackTraceMax))
return;
EXPECT_EQ(4U, trace.size);
EXPECT_EQ(start_pc, trace.trace[0]);
for (uptr i = 1; i < 4U; i++) {
EXPECT_EQ(PC(i*2 - 1), trace.trace[i]);
}
}
TEST_F(FastUnwindTest, OneFrameStackTrace) {
if (!TryFastUnwind(1))
return;
EXPECT_EQ(1U, trace.size);
EXPECT_EQ(start_pc, trace.trace[0]);
EXPECT_EQ((uptr)&fake_stack[0], trace.top_frame_bp);
}
}