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* Makefile.common (COMPILE_CXX): Add support for per-file overrides to exclude $(nostdinc) and $(nostdincxx) from compiler flags. (COMPILE_CC): Likewise for $(nostdinc). winsup/cygwin/ChangeLog: * Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o (libstdcxx_wrapper_CFLAGS): Add flags for new module. (_cygwin_crt0_common_STDINCFLAGS): Define per-file override. (libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise. * cxx.cc: Include "cygwin-cxx.h". (operator new): Tweak prototype for full standards compliance. (operator new[]): Likewise. (operator new (nothrow)): New fallback function. (operator new[] (nothrow), operator delete (nothrow), operator delete[] (nothrow)): Likewise. (default_cygwin_cxx_malloc): New struct of pointers to the above, for final last-resort fallback default. * cygwin-cxx.h: New file. (struct per_process_cxx_malloc): Define. (default_cygwin_cxx_malloc): Declare extern. * cygwin.din (__wrap__ZdaPv): Export new wrapper. (__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv, __wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj, __wrap__ZnajRKSt9nothrow_t, __wrap__Znwj, __wrap__ZnwjRKSt9nothrow_t): Likewise. * globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee' field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc. * libstdcxx_wrapper.cc: New file. (__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv, __wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj, __wrap__ZnajRKSt9nothrow_t, __wrap__Znwj, __wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++ malloc operators and their overrides. * winsup.h (default_cygwin_cxx_malloc): Declare extern. * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump. * include/sys/cygwin.h (struct per_process_cxx_malloc): Forward declare here. (struct per_process::forkee): Rename and repurpose from this ... (struct per_process::cxx_malloc): ... to this. * lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h. (WEAK): Define shorthand helper macro. (__cygwin_cxx_malloc): Define and populate with weak references to whatever libstdc++ malloc operators will be visible at final link time for Cygwin apps and dlls. (_cygwin_crt0_common): Always look up cygwin DLL's internal per_process data, and don't test for (impossible) failure. Inherit any members of __cygwin_cxx_malloc that we don't have overrides for from the DLL's default and store the resulting overall set of overrides back into the DLL's global per_process data.
91 lines
2.6 KiB
C++
Executable File
91 lines
2.6 KiB
C++
Executable File
/* libstdcxx_wrapper.cc
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Copyright 2009 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* We provide these stubs to call into a user's
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provided ONDEE replacement if there is one - otherwise
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it must fall back to the standard libstdc++ version. */
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#include "winsup.h"
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#include "cygwin-cxx.h"
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#include "perprocess.h"
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/* We are declaring asm names for the functions we define here, as we want
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to define the wrappers in this file. GCC links everything with wrappers
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around the standard C++ memory management operators; these are the wrappers,
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but we want the compiler to know they are the malloc operators and not have
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it think they're just any old function matching 'extern "C" _wrap_*'. */
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extern void *operator new(std::size_t sz) throw (std::bad_alloc)
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__asm__ ("___wrap__Znwj");
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extern void *operator new[](std::size_t sz) throw (std::bad_alloc)
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__asm__ ("___wrap__Znaj");
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extern void operator delete(void *p) throw()
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__asm__ ("___wrap__ZdlPv ");
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extern void operator delete[](void *p) throw()
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__asm__ ("___wrap__ZdaPv");
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extern void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()
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__asm__ ("___wrap__ZnwjRKSt9nothrow_t");
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extern void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
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__asm__ ("___wrap__ZnajRKSt9nothrow_t");
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extern void operator delete(void *p, const std::nothrow_t &nt) throw()
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__asm__ ("___wrap__ZdlPvRKSt9nothrow_t");
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extern void operator delete[](void *p, const std::nothrow_t &nt) throw()
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__asm__ ("___wrap__ZdaPvRKSt9nothrow_t");
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extern void *
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operator new(std::size_t sz) throw (std::bad_alloc)
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{
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return (*user_data->cxx_malloc->oper_new) (sz);
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}
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extern void *
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operator new[](std::size_t sz) throw (std::bad_alloc)
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{
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return (*user_data->cxx_malloc->oper_new__) (sz);
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}
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extern void
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operator delete(void *p) throw()
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{
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(*user_data->cxx_malloc->oper_delete) (p);
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}
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extern void
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operator delete[](void *p) throw()
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{
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(*user_data->cxx_malloc->oper_delete__) (p);
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}
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extern void *
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operator new(std::size_t sz, const std::nothrow_t &nt) throw()
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{
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return (*user_data->cxx_malloc->oper_new_nt) (sz, nt);
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}
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extern void *
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operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
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{
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return (*user_data->cxx_malloc->oper_new___nt) (sz, nt);
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}
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extern void
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operator delete(void *p, const std::nothrow_t &nt) throw()
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{
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(*user_data->cxx_malloc->oper_delete_nt) (p, nt);
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}
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extern void
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operator delete[](void *p, const std::nothrow_t &nt) throw()
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{
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(*user_data->cxx_malloc->oper_delete___nt) (p, nt);
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}
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