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/*
* Copyright (C) 2020 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <cxxabi.h>
#include <gtest/gtest.h>
#include <string.h>
TEST(__cxa_demangle, cxa_demangle_fuzz_152588929) {
#if defined(__aarch64__)
// Test the C++ demangler on an invalid mangled string. libc++abi currently
// parses it like so:
// (1 "\006") (I (L e "eeEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE" E) E)
// There are a few interesting things about this mangled input:
// - The IA64 C++ ABI specifies that an FP literal's hex chars are lowercase.
// The libc++abi demangler currently accepts uppercase A-F digits, which is
// confusing because 'E' is supposed to mark the end of the <expr-primary>.
// - libc++abi uses snprintf("%a") which puts an unspecified number of bits
// in the digit before the decimal point.
// - The identifier name is "\006", and the IA64 C++ ABI spec is explicit
// about not specifying the encoding for characters outside of
// [_A-Za-z0-9].
// - The 'e' type is documented as "long double, __float80", and in practice
// the length of the literal depends on the arch. For arm64, it is a
// 128-bit FP type encoded using 32 hex chars. The situation with x86-64
// Android OTOH is messy because Clang uses 'g' for its 128-bit
// long double.
char* p = abi::__cxa_demangle("1\006ILeeeEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE", 0, 0, 0);
if (p && !strcmp(p, "\x6<-0x1.cecececececececececececececep+11983")) {
// Prior to llvm.org/D77924, libc++abi left off the "L>" suffix.
} else if (p && !strcmp(p, "\x6<-0x1.cecececececececececececececep+11983L>")) {
// After llvm.org/D77924, the "L>" suffix is present. libc++abi
// accepts A-F digits but decodes each using (digit - 'a' + 10), turning 'E'
// into -18.
} else {
// TODO: Remove the other accepted outputs, because libc++abi probably
// should reject this input.
ASSERT_EQ(nullptr, p) << p;
}
free(p);
#endif
}
TEST(__cxa_demangle, DISABLED_cxa_demangle_fuzz_167977068) {
#if defined(__aarch64__)
char* p = abi::__cxa_demangle("DTLeeeeeeeeeeeeeeeeeeeeeeeeeEEEEeeEEEE", 0, 0, 0);
ASSERT_EQ(nullptr, p) << p;
free(p);
#endif
}
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