The appspawn fork a hap process and set a flag(0 or 1) to the libnetsys_client,
Judge whether the flag in libnetsys_client is 1 in the socket() and name_from_dns_search() interface,
Do not create a AF_INET or AF_INET6 socket or query DNS if the flag is 0
Signed-off-by: Nmaosiping <maosiping@huawei.com>

Signed-off-by: NshuxinyiA <zhangcui11@huawei.com>
Signed-off-by: Nshuxinyia <shuxinyi4@h-partners.com>

Signed-off-by: Nmaosiping <maosiping@huawei.com>

Signed-off-by: Nhhj <huanghuijin@huawei.com>

musl的dlopen实现在ld-musl-aarch64-asan.so.1库中，因为这个库是linker，
比asan运行时库libclang_rt.asan.so更早被执行，dlopen中因为使用了动态内存分配，
在asan的hook生效前就已经调用了calloc，等到asan hook生效后再触发了调用realloc，
被asan检测到realloc的内存地址不在asan的动态内存管理范围内从而触发报告asan错误日志，
而asan报告错误日志时正好又需要调用到dl相关函数（dl_iterate_phdr）进行函数栈回溯，
进而导致死锁。
本PR中的修改方法是将linker中使用的内存操作函数进行本地绑定，不让asan运行时库接管，
进而避免此问题场景的出现，本修改仅影响asan版本，正常版本不受影响。
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I499228c658e23ee47c51e18a91cb4b9cbec57722

Signed-off-by: Nfangting <fangting10@huawei.com>

reserve 16K for 32bit system and 32K for 64bit system
as the stack is reserved by mmap, it may not take physical memory
until handle signal with SA_ONSTACK flag.
Signed-off-by: Nmaplestory <zengzhi5@huawei.com>

Signed-off-by: Nmaweiye <maweiye@huawei.com>

Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I1e9c3ee45c16ce719450ab3fe9819e8f608eeb49

Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I299fd0210b7baa081a98ed1655bae06fd45173e8

Signed-off-by: Nchenjianwen <chenjianwen15@huawei.com>

Signed-off-by: Nchenjianwen <chenjianwen15@huawei.com>

Signed-off-by: Nchenjianwen <chenjianwen15@huawei.com>

Signed-off-by: Nchenjianwen <chenjianwen15@huawei.com>

re #I4PRNO
Signed-off-by: Nmucor <mucorwang@gmail.com>

Signed-off-by: chuxuezhe111 <hanjixiao@huawei.com>

Signed-off-by: Ndhy308 <tony.gan@huawei.com>

Signed-off-by: Ndhy308 <tony.gan@huawei.com>

Signed-off-by: Ndhy308 <tony.gan@huawei.com>

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

Signed-off-by: Ndhy308 <tony.gan@huawei.com>

Signed-off-by: Nweichaox <wangweichao2@huawei.com>
Change-Id: Ie4d0365dda47a9f187d9e5022bec642445a4fd56

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

1. Enable compilation of 7_hard_neon-vfpv4 target.
2. Modify cflags/ldflags to match orignal musl Makefile/configure.
3. Add script for configure musl source files, not enabled yet.
Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

2. Add BUILD.gn and its components
Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>