ad76a4f7a9
In the following code, even though the application does not use exceptions, an exception is still thrown in libcxx
If libcxxabi is not enabled, the toolchain default implementation will be used. However, arm-gcc does not enable thread
support by default, which will cause errors in a multi-threaded environment.
Therefore, we need to use libcxxabi to ensure normal functions in a multi-threaded environment.
using namespace std;
void foo(bool recur);
int bar(bool recur)
{
if (recur) {
foo(false);
}
return 0xFAFAFA;
}
void foo(bool recur)
{
static int i = bar(recur);
cout << "Static is:" << i << "\n";
}
int main(int argc, char *argv[])
{
foo(true);
return 0;
}
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
84 lines
3.2 KiB
Plaintext
84 lines
3.2 KiB
Plaintext
############################################################################
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# libs/libxx/libcxxabi.defs
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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###########################################################################
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LIBCXXABI_VERSION=$(patsubst "%",%,$(CONFIG_LIBCXXABI_VERSION))
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# Download and unpack tarball if no git repo found
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ifeq ($(wildcard libcxxabi/.git),)
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libcxxabi-$(LIBCXXABI_VERSION).src.tar.xz:
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$(call DOWNLOAD,https://github.com/llvm/llvm-project/releases/download/llvmorg-$(LIBCXXABI_VERSION),libcxxabi-$(LIBCXXABI_VERSION).src.tar.xz)
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libcxxabi: libcxxabi-$(LIBCXXABI_VERSION).src.tar.xz
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$(Q) tar -xf libcxxabi-$(LIBCXXABI_VERSION).src.tar.xz
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$(Q) mv libcxxabi-$(LIBCXXABI_VERSION).src libcxxabi
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$(Q) touch $@
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endif
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$(TOPDIR)/include/libcxxabi: libcxxabi
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$(Q) $(DIRLINK) $(CURDIR)/libcxxabi/include $(TOPDIR)/include/libcxxabi
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$(Q) cp $(CURDIR)/__config_site $(TOPDIR)/include/libcxxabi/__config_site
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context:: $(TOPDIR)/include/libcxxabi
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distclean::
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$(Q) $(DIRUNLINK) $(TOPDIR)/include/libcxxabi
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ifeq ($(wildcard libcxxabi/.git),)
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$(Q) $(DELFILE) libcxxabi-$(LIBCXX_VERSION).src.tar.xz
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$(call DELDIR, libcxxabi)
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endif
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ifeq ($(CONFIG_LIBCXXABI), y)
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CXXFLAGS += ${DEFINE_PREFIX}LIBCXX_BUILDING_LIBCXXABI
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CXXFLAGS += -I $(TOPDIR)/libs/libxx/libcxxabi/include
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# Disable dynamic type checking when enabling libcxxabi
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# It results in a recursive call:
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# cxxabiv1::__dynamic_case -> is_equal -> __ubsan::checkDynamic -> cxxabiv1::__dynamic_case
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ifneq ($(CONFIG_SIM_UBSAN)${CONFIG_MM_UBSAN},)
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CXXFLAGS += -fno-sanitize=vptr
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endif
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endif
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# C++ABI files
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CPPSRCS += cxa_aux_runtime.cpp cxa_default_handlers.cpp cxa_demangle.cpp cxa_exception_storage.cpp
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CPPSRCS += cxa_guard.cpp cxa_handlers.cpp cxa_thread_atexit.cpp cxa_vector.cpp cxa_virtual.cpp
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# C++ STL files
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CPPSRCS += stdlib_exception.cpp stdlib_new_delete.cpp stdlib_stdexcept.cpp stdlib_typeinfo.cpp
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# Internal files
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CPPSRCS += abort_message.cpp fallback_malloc.cpp private_typeinfo.cpp
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# Always compile libcxxabi with exception
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CPPSRCS += cxa_exception.cpp cxa_personality.cpp
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CXXFLAGS += -fexceptions
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# Fix compilation error on ARM32:
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# libcxxabi/src/cxa_personality.cpp:594:22: error: '_URC_FATAL_PHASE1_ERROR' was not declared in this scope
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# 594 | results.reason = _URC_FATAL_PHASE1_ERROR;
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ifeq ($(CONFIG_ARCH_ARM),y)
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CXXFLAGS += -D_URC_FATAL_PHASE2_ERROR=_URC_FAILURE -D_URC_FATAL_PHASE1_ERROR=_URC_FAILURE
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endif
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# RTTI is required for building the libcxxabi library
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CXXFLAGS += -frtti
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DEPPATH += --dep-path libcxxabi/src
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VPATH += libcxxabi/src
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