llvm-project/compiler-rt/test/fuzzer/ImplicitSignedIntegerTruncationOrSignChangeTest.cpp
Roman Lebedev 320e9af309 [compiler-rt][ubsan] Implicit Conversion Sanitizer - integer sign change - compiler-rt part
Summary:
This is a compiler-rt part.
The clang part is D50250.

See [[ https://bugs.llvm.org/show_bug.cgi?id=21530 | PR21530 ]], https://github.com/google/sanitizers/issues/940.

Reviewers: vsk, filcab, #sanitizers

Reviewed By: filcab, #sanitizers

Subscribers: mclow.lists, srhines, kubamracek, dberris, rjmccall, rsmith, llvm-commits, regehr

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D50251

llvm-svn: 345659
2018-10-30 21:58:54 +00:00

28 lines
680 B
C++

// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// Test for implicit-signed-integer-truncation-or-sign-change.
#include <assert.h>
#include <climits>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <iostream>
static volatile int8_t Sink;
static volatile uint32_t Storage = (uint32_t)-1;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
assert(Data);
if (Size > 0 && Data[0] == 'H') {
Sink = 1;
if (Size > 1 && Data[1] == 'i') {
Sink = 2;
if (Size > 2 && Data[2] == '!') {
Sink = Storage; // 'conversion'.
}
}
}
return 0;
}