mirror of
https://github.com/VectorCamp/vectorscan.git
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b8d33732b5
We now check that mem alloc for error message is aligned, and fail with an appropriate message in the compile error.
111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
/*
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* Copyright (c) 2015-2016, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* \brief Compile-time error utils.
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*/
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#include "allocator.h"
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#include "error.h"
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#include "ue2common.h"
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#include "hs_compile.h"
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#include "util/compile_error.h"
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#include <cstring>
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#include <string>
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using std::string;
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static const char failureNoMemory[] = "Unable to allocate memory.";
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static const char failureInternal[] = "Internal error.";
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static const char failureBadAlloc[] = "Allocator returned misaligned memory.";
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extern const hs_compile_error_t hs_enomem = {
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const_cast<char *>(failureNoMemory), 0
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};
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extern const hs_compile_error_t hs_einternal = {
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const_cast<char *>(failureInternal), 0
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};
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extern const hs_compile_error_t hs_badalloc = {
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const_cast<char *>(failureBadAlloc), 0
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};
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namespace ue2 {
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hs_compile_error_t *generateCompileError(const string &err, int expression) {
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hs_compile_error_t *ret =
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(struct hs_compile_error *)hs_misc_alloc(sizeof(hs_compile_error_t));
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if (ret) {
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hs_error_t e = hs_check_alloc(ret);
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if (e != HS_SUCCESS) {
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hs_misc_free(ret);
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return const_cast<hs_compile_error_t *>(&hs_badalloc);
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}
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char *msg = (char *)hs_misc_alloc(err.size() + 1);
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if (msg) {
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e = hs_check_alloc(msg);
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if (e != HS_SUCCESS) {
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hs_misc_free(msg);
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return const_cast<hs_compile_error_t *>(&hs_badalloc);
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}
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memcpy(msg, err.c_str(), err.size() + 1);
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ret->message = msg;
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} else {
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hs_misc_free(ret);
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ret = nullptr;
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}
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}
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if (!ret || !ret->message) {
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return const_cast<hs_compile_error_t *>(&hs_enomem);
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}
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ret->expression = expression;
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return ret;
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}
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hs_compile_error_t *generateCompileError(const CompileError &e) {
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return generateCompileError(e.reason, e.hasIndex ? (int)e.index : -1);
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}
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void freeCompileError(hs_compile_error_t *error) {
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if (!error) {
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return;
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}
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if (error == &hs_enomem || error == &hs_einternal ||
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error == &hs_badalloc) {
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// These are not allocated.
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return;
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}
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hs_misc_free(error->message);
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hs_misc_free(error);
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}
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} // namespace ue2
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