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//===- ASanStackFrameLayoutTest.cpp - Tests for ComputeASanStackFrameLayout===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/ASanStackFrameLayout.h"
#include "llvm/ADT/ArrayRef.h"
#include "gtest/gtest.h"
#include <sstream>
using namespace llvm;
static std::string
ShadowBytesToString(ArrayRef<uint8_t> ShadowBytes) {
std::ostringstream os;
for (size_t i = 0, n = ShadowBytes.size(); i < n; i++) {
switch (ShadowBytes[i]) {
case kAsanStackLeftRedzoneMagic: os << "L"; break;
case kAsanStackRightRedzoneMagic: os << "R"; break;
case kAsanStackMidRedzoneMagic: os << "M"; break;
default: os << (unsigned)ShadowBytes[i];
}
}
return os.str();
}
static void TestLayout(SmallVector<ASanStackVariableDescription, 10> Vars,
size_t Granularity, size_t MinHeaderSize,
const std::string &ExpectedDescr,
const std::string &ExpectedShadow) {
ASanStackFrameLayout L;
ComputeASanStackFrameLayout(Vars, Granularity, MinHeaderSize, &L);
EXPECT_EQ(ExpectedDescr, L.DescriptionString);
EXPECT_EQ(ExpectedShadow, ShadowBytesToString(L.ShadowBytes));
}
TEST(ASanStackFrameLayout, Test) {
#define VEC1(a) SmallVector<ASanStackVariableDescription, 10>(1, a)
#define VEC(a) \
SmallVector<ASanStackVariableDescription, 10>(a, a + sizeof(a) / sizeof(a[0]))
#define VAR(name, size, alignment) \
ASanStackVariableDescription name##size##_##alignment = { \
#name #size "_" #alignment, \
size, \
alignment, \
0, \
0 \
}
VAR(a, 1, 1);
VAR(p, 1, 32);
VAR(p, 1, 256);
VAR(a, 2, 1);
VAR(a, 3, 1);
VAR(a, 4, 1);
VAR(a, 7, 1);
VAR(a, 8, 1);
VAR(a, 9, 1);
VAR(a, 16, 1);
VAR(a, 41, 1);
VAR(a, 105, 1);
TestLayout(VEC1(a1_1), 8, 16, "1 16 1 4 a1_1", "LL1R");
TestLayout(VEC1(a1_1), 64, 64, "1 64 1 4 a1_1", "L1");
TestLayout(VEC1(p1_32), 8, 32, "1 32 1 5 p1_32", "LLLL1RRR");
TestLayout(VEC1(p1_32), 8, 64, "1 64 1 5 p1_32", "LLLLLLLL1RRRRRRR");
TestLayout(VEC1(a1_1), 8, 32, "1 32 1 4 a1_1", "LLLL1RRR");
TestLayout(VEC1(a2_1), 8, 32, "1 32 2 4 a2_1", "LLLL2RRR");
TestLayout(VEC1(a3_1), 8, 32, "1 32 3 4 a3_1", "LLLL3RRR");
TestLayout(VEC1(a4_1), 8, 32, "1 32 4 4 a4_1", "LLLL4RRR");
TestLayout(VEC1(a7_1), 8, 32, "1 32 7 4 a7_1", "LLLL7RRR");
TestLayout(VEC1(a8_1), 8, 32, "1 32 8 4 a8_1", "LLLL0RRR");
TestLayout(VEC1(a9_1), 8, 32, "1 32 9 4 a9_1", "LLLL01RR");
TestLayout(VEC1(a16_1), 8, 32, "1 32 16 5 a16_1", "LLLL00RR");
TestLayout(VEC1(p1_256), 8, 32, "1 256 1 6 p1_256",
"LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL1RRR");
TestLayout(VEC1(a41_1), 8, 32, "1 32 41 5 a41_1", "LLLL000001RRRRRR");
TestLayout(VEC1(a105_1), 8, 32, "1 32 105 6 a105_1",
"LLLL00000000000001RRRRRR");
{
ASanStackVariableDescription t[] = {a1_1, p1_256};
TestLayout(VEC(t), 8, 32,
"2 256 1 6 p1_256 272 1 4 a1_1",
"LLLLLLLL" "LLLLLLLL" "LLLLLLLL" "LLLLLLLL" "1M1R");
}
{
ASanStackVariableDescription t[] = {a1_1, a16_1, a41_1};
TestLayout(VEC(t), 8, 32,
"3 32 1 4 a1_1 48 16 5 a16_1 80 41 5 a41_1",
"LLLL" "1M00" "MM00" "0001" "RRRR");
}
#undef VEC1
#undef VEC
#undef VAR
}
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