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Simplify ARM fuzz tests

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This commit is contained in:
Tillmann Karras 2016-08-05 01:56:35 +01:00
parent 023643b4fa
commit a97668ead4
1 changed files with 26 additions and 71 deletions
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97
tests/arm/fuzz_arm.cpp
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@ -141,12 +141,23 @@ public:
}
}
}
u32 Generate() const {
u32 Generate(bool condition = true) const {
u32 inst;
do {
u32 random = RandInt<u32>(0, 0xFFFFFFFF);
if (condition)
random &= ~(0xF << 28);
inst = bits | (random & ~mask);
} while (!is_valid(inst));
if (condition) {
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1)
inst |= RandInt(0x0, 0xD) << 28;
else
inst |= 0xE << 28;
}
return inst;
}
u32 Bits() { return bits; }
@ -450,42 +461,15 @@ TEST_CASE("Fuzz ARM reversal instructions", "[JitX64]") {
const std::array<InstructionGenerator, 3> rev_instructions = {
{
InstructionGenerator("0000011010111111dddd11110011mmmm", is_valid),
InstructionGenerator("0000011010111111dddd11111011mmmm", is_valid),
InstructionGenerator("0000011011111111dddd11111011mmmm", is_valid),
InstructionGenerator("cccc011010111111dddd11110011mmmm", is_valid),
InstructionGenerator("cccc011010111111dddd11111011mmmm", is_valid),
InstructionGenerator("cccc011011111111dddd11111011mmmm", is_valid),
}
};
SECTION("REV tests") {
SECTION("Reverse tests") {
FuzzJitArm(1, 1, 10000, [&rev_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return rev_instructions[0].Generate() | (cond << 28);
});
}
SECTION("REV16 tests") {
FuzzJitArm(1, 1, 10000, [&rev_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return rev_instructions[1].Generate() | (cond << 28);
});
}
SECTION("REVSH tests") {
FuzzJitArm(1, 1, 10000, [&rev_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return rev_instructions[2].Generate() | (cond << 28);
return rev_instructions[RandInt<size_t>(0, rev_instructions.size() - 1)].Generate();
});
}
}
@ -572,68 +556,39 @@ TEST_CASE("Fuzz ARM Load/Store instructions", "[JitX64]") {
SECTION("Doubleword tests") {
FuzzJitArm(1, 1, 10000, [&doubleword_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return doubleword_instructions[RandInt<size_t>(0, doubleword_instructions.size() - 1)].Generate() | (cond << 28);
return doubleword_instructions[RandInt<size_t>(0, doubleword_instructions.size() - 1)].Generate();
});
}
SECTION("Word tests") {
FuzzJitArm(1, 1, 10000, [&word_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return word_instructions[RandInt<size_t>(0, word_instructions.size() - 1)].Generate() | (cond << 28);
return word_instructions[RandInt<size_t>(0, word_instructions.size() - 1)].Generate();
});
}
SECTION("Halfword tests") {
FuzzJitArm(1, 1, 10000, [&halfword_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return halfword_instructions[RandInt<size_t>(0, halfword_instructions.size() - 1)].Generate() | (cond << 28);
return halfword_instructions[RandInt<size_t>(0, halfword_instructions.size() - 1)].Generate();
});
}
SECTION("Byte tests") {
FuzzJitArm(1, 1, 10000, [&byte_instructions]() -> u32 {
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
return byte_instructions[RandInt<size_t>(0, byte_instructions.size() - 1)].Generate() | (cond << 28);
return byte_instructions[RandInt<size_t>(0, byte_instructions.size() - 1)].Generate();
});
}
SECTION("Mixed tests") {
FuzzJitArm(10, 10, 10000, [&]() -> u32 {
size_t selection = RandInt<size_t>(0, 3);
u32 cond = 0xE;
// Have a one-in-twenty-five chance of actually having a cond.
if (RandInt(1, 25) == 1) {
cond = RandInt<u32>(0x0, 0xD);
}
switch (selection) {
switch (RandInt(0, 3)) {
case 0:
return doubleword_instructions[RandInt<size_t>(0, doubleword_instructions.size() - 1)].Generate() | (cond << 28);
return doubleword_instructions[RandInt<size_t>(0, doubleword_instructions.size() - 1)].Generate();
case 1:
return word_instructions[RandInt<size_t>(0, word_instructions.size() - 1)].Generate() | (cond << 28);
return word_instructions[RandInt<size_t>(0, word_instructions.size() - 1)].Generate();
case 2:
return halfword_instructions[RandInt<size_t>(0, halfword_instructions.size() - 1)].Generate() | (cond << 28);
return halfword_instructions[RandInt<size_t>(0, halfword_instructions.size() - 1)].Generate();
case 3:
return byte_instructions[RandInt<size_t>(0, byte_instructions.size() - 1)].Generate() | (cond << 28);
return byte_instructions[RandInt<size_t>(0, byte_instructions.size() - 1)].Generate();
}
return 0;