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Before this patch curl used the C preprocessor to override standard memory allocation symbols: malloc, calloc, strdup, realloc, free. The goal of these is to replace them with curl's debug wrappers in `CURLDEBUG` builds, another was to replace them with the wrappers calling user-defined allocators in libcurl. This solution needed a bunch of workarounds to avoid breaking external headers: it relied on include order to do the overriding last. For "unity" builds it needed to reset overrides before external includes. Also in test apps, which are always built as single source files. It also needed the `(symbol)` trick to avoid overrides in some places. This would still not fix cases where the standard symbols were macros. It was also fragile and difficult to figure out which was the actual function behind an alloc or free call in a specific piece of code. This in turn caused bugs where the wrong allocator was accidentally called. To avoid these problems, this patch replaces this solution with `curlx_`-prefixed allocator macros, and mapping them _once_ to either the libcurl wrappers, the debug wrappers or the standard ones, matching the rest of the code in libtests. This concludes the long journey to avoid redefining standard functions in the curl codebase. Note: I did not update `packages/OS400/*.c` sources. They did not `#include` `curl_setup.h`, `curl_memory.h` or `memdebug.h`, meaning the overrides were never applied to them. This may or may not have been correct. For now I suppressed the direct use of standard allocators via a local `.checksrc`. Probably they (except for `curlcl.c`) should be updated to include `curl_setup.h` and use the `curlx_` macros. This patch changes mappings in two places: - `lib/curl_threads.c` in libtests: Before this patch it mapped to libcurl allocators. After, it maps to standard allocators, like the rest of libtests code. - `units`: before this patch it mapped to standard allocators. After, it maps to libcurl allocators. Also: - drop all position-dependent `curl_memory.h` and `memdebug.h` includes, and delete the now unnecessary headers. - rename `Curl_tcsdup` macro to `curlx_tcsdup` and define like the other allocators. - map `curlx_strdup()` to `_strdup()` on Windows (was: `strdup()`). To fix warnings silenced via `_CRT_NONSTDC_NO_DEPRECATE`. - multibyte: map `curlx_convert_*()` to `_strdup()` on Windows (was: `strdup()`). - src: do not reuse the `strdup` name for the local replacement. - lib509: call `_strdup()` on Windows (was: `strdup()`). - test1132: delete test obsoleted by this patch. - CHECKSRC.md: update text for `SNPRINTF`. - checksrc: ban standard allocator symbols. Follow-up tob12da22db1#18866 Follow-up todb98daab05#18844 Follow-up to4deea9396b#18814 Follow-up to9678ff5b1b#18776 Follow-up to10bac43b87#18774 Follow-up to20142f5d06#18634 Follow-up tobf7375ecc5#18503 Follow-up to9863599d69#18502 Follow-up to3bb5e58c10#17827 Closes #19626
85 lines
3 KiB
C
85 lines
3 KiB
C
#ifndef HEADER_CURL_MULTIBYTE_H
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#define HEADER_CURL_MULTIBYTE_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "../curl_setup.h"
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#ifdef _WIN32
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/* MultiByte conversions using Windows kernel32 library. */
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wchar_t *curlx_convert_UTF8_to_wchar(const char *str_utf8);
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char *curlx_convert_wchar_to_UTF8(const wchar_t *str_w);
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#endif
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/*
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* Macros curlx_convert_UTF8_to_tchar(), curlx_convert_tchar_to_UTF8()
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* and curlx_unicodefree() main purpose is to minimize the number of
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* preprocessor conditional directives needed by code using these
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* to differentiate Unicode from non-Unicode builds.
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*
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* In the case of a non-Unicode build the tchar strings are char strings that
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* are duplicated via strdup and remain in whatever the passed in encoding is,
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* which is assumed to be UTF-8 but may be other encoding. Therefore the
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* significance of the conversion functions is primarily for Unicode builds.
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*
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* Allocated memory should be free'd with curlx_unicodefree().
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*
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* Use system allocators to avoid infinite recursion when called by curl's
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* memory tracker memdebug functions.
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*/
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#if defined(UNICODE) && defined(_WIN32)
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#define curlx_convert_UTF8_to_tchar(ptr) curlx_convert_UTF8_to_wchar((ptr))
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#define curlx_convert_tchar_to_UTF8(ptr) curlx_convert_wchar_to_UTF8((ptr))
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typedef union {
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unsigned short *tchar_ptr;
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const unsigned short *const_tchar_ptr;
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unsigned short *tbyte_ptr;
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const unsigned short *const_tbyte_ptr;
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} xcharp_u;
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#else
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#ifdef _WIN32
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#define curlx_convert_UTF8_to_tchar(ptr) _strdup(ptr)
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#define curlx_convert_tchar_to_UTF8(ptr) _strdup(ptr)
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#else
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#define curlx_convert_UTF8_to_tchar(ptr) strdup(ptr)
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#define curlx_convert_tchar_to_UTF8(ptr) strdup(ptr)
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#endif
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typedef union {
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char *tchar_ptr;
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const char *const_tchar_ptr;
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unsigned char *tbyte_ptr;
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const unsigned char *const_tbyte_ptr;
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} xcharp_u;
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#endif /* UNICODE && _WIN32 */
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/* the purpose of this macro is to free() without being traced by memdebug */
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#define curlx_unicodefree(ptr) free(ptr)
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#endif /* HEADER_CURL_MULTIBYTE_H */
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