Make clang sanitizers work under musl

nongnu.patch

diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
index e26b400..9618933 100644
--- a/lib/asan/asan_linux.cc
+++ b/lib/asan/asan_linux.cc
@@ -39,7 +39,7 @@
 #include <sys/link_elf.h>
 #endif
 
-#if SANITIZER_ANDROID || SANITIZER_FREEBSD
+#if SANITIZER_ANDROID || SANITIZER_FREEBSD || SANITIZER_NONGNU
 #include <ucontext.h>
 extern "C" void* _DYNAMIC;
 #else
@@ -75,7 +75,7 @@ void *AsanDoesNotSupportStaticLinkage() {
   return &_DYNAMIC;  // defined in link.h
 }
 
-#if SANITIZER_ANDROID
+#if SANITIZER_ANDROID || SANITIZER_NONGNU
 // FIXME: should we do anything for Android?
 void AsanCheckDynamicRTPrereqs() {}
 void AsanCheckIncompatibleRT() {}
diff --git a/lib/interception/interception_linux.cc b/lib/interception/interception_linux.cc
index 6e908ac..76c1688 100644
--- a/lib/interception/interception_linux.cc
+++ b/lib/interception/interception_linux.cc
@@ -24,7 +24,7 @@ bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
   return real == wrapper;
 }
 
-#if !defined(__ANDROID__)  // android does not have dlvsym
+#if !defined(__ANDROID__) && defined(__GLIBC__)  // android does not have dlvsym
 void *GetFuncAddrVer(const char *func_name, const char *ver) {
   return dlvsym(RTLD_NEXT, func_name, ver);
 }
diff --git a/lib/msan/msan_linux.cc b/lib/msan/msan_linux.cc
index ab3be91..6656416 100644
--- a/lib/msan/msan_linux.cc
+++ b/lib/msan/msan_linux.cc
@@ -13,7 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "sanitizer_common/sanitizer_platform.h"
-#if SANITIZER_FREEBSD || SANITIZER_LINUX
+#if SANITIZER_FREEBSD || SANITIZER_LINUX && !SANITIZER_NONGNU
 
 #include "msan.h"
 #include "msan_thread.h"
diff --git a/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc b/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
index fcd0a3d..b40befd 100644
--- a/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
+++ b/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
@@ -97,7 +97,7 @@ static void ioctl_table_fill() {
   _(SIOCGETVIFCNT, WRITE, struct_sioc_vif_req_sz);
 #endif
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_NONGNU
   // Conflicting request ids.
   // _(CDROMAUDIOBUFSIZ, NONE, 0);
   // _(SNDCTL_TMR_CONTINUE, NONE, 0);
@@ -358,7 +358,7 @@ static void ioctl_table_fill() {
   _(VT_WAITACTIVE, NONE, 0);
 #endif
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   // _(SIOCDEVPLIP, WRITE, struct_ifreq_sz); // the same as EQL_ENSLAVE
   _(CYGETDEFTHRESH, WRITE, sizeof(int));
   _(CYGETDEFTIMEOUT, WRITE, sizeof(int));
diff --git a/lib/sanitizer_common/sanitizer_common_syscalls.inc b/lib/sanitizer_common/sanitizer_common_syscalls.inc
index 008e577..5883a97 100644
--- a/lib/sanitizer_common/sanitizer_common_syscalls.inc
+++ b/lib/sanitizer_common/sanitizer_common_syscalls.inc
@@ -2042,7 +2042,7 @@ POST_SYSCALL(setrlimit)(long res, long resource, void *rlim) {
   }
 }
 
-#if !SANITIZER_ANDROID
+#if !SANITIZER_ANDROID && !SANITIZER_NONGNU
 PRE_SYSCALL(prlimit64)(long pid, long resource, const void *new_rlim,
                        void *old_rlim) {
   if (new_rlim) PRE_READ(new_rlim, struct_rlimit64_sz);
diff --git a/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_linux_libcdep.cc
index 04031d2..a95fe51 100644
--- a/lib/sanitizer_common/sanitizer_linux_libcdep.cc
+++ b/lib/sanitizer_common/sanitizer_linux_libcdep.cc
@@ -26,7 +26,7 @@
 #include "sanitizer_procmaps.h"
 #include "sanitizer_stacktrace.h"
 
-#if SANITIZER_ANDROID || SANITIZER_FREEBSD
+#if SANITIZER_ANDROID || SANITIZER_FREEBSD || SANITIZER_NONGNU
 #include <dlfcn.h>  // for dlsym()
 #endif
 
@@ -156,7 +156,7 @@ bool SanitizerGetThreadName(char *name, int max_len) {
 #endif
 }
 
-#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
+#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO && !SANITIZER_NONGNU
 static uptr g_tls_size;
 #endif
 
@@ -185,7 +185,7 @@ static uptr TlsPreTcbSize() {
 #endif
 
 void InitTlsSize() {
-#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
+#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO && !SANITIZER_NONGNU
 // all current supported platforms have 16 bytes stack alignment
   const size_t kStackAlign = 16;
   typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION;
@@ -201,12 +201,12 @@ void InitTlsSize() {
   if (tls_align < kStackAlign)
     tls_align = kStackAlign;
   g_tls_size = RoundUpTo(tls_size, tls_align);
-#endif  // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
+#endif  // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO && !SANITIZER_NONGNU
 }
 
 #if (defined(__x86_64__) || defined(__i386__) || defined(__mips__) \
     || defined(__aarch64__) || defined(__powerpc64__)) \
-    && SANITIZER_LINUX && !SANITIZER_ANDROID
+    && SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 // sizeof(struct pthread) from glibc.
 static atomic_uintptr_t kThreadDescriptorSize;
 
@@ -336,7 +336,7 @@ uptr ThreadSelf() {
 
 #if !SANITIZER_GO
 static void GetTls(uptr *addr, uptr *size) {
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 # if defined(__x86_64__) || defined(__i386__)
   *addr = ThreadSelf();
   *size = GetTlsSize();
@@ -362,7 +362,7 @@ static void GetTls(uptr *addr, uptr *size) {
     *addr = (uptr) dtv[2];
     *size = (*addr == 0) ? 0 : ((uptr) segbase[0] - (uptr) dtv[2]);
   }
-#elif SANITIZER_ANDROID
+#elif SANITIZER_ANDROID || SANITIZER_NONGNU
   *addr = 0;
   *size = 0;
 #else
@@ -373,7 +373,7 @@ static void GetTls(uptr *addr, uptr *size) {
 
 #if !SANITIZER_GO
 uptr GetTlsSize() {
-#if SANITIZER_FREEBSD || SANITIZER_ANDROID
+#if SANITIZER_FREEBSD || SANITIZER_ANDROID || SANITIZER_NONGNU
   uptr addr, size;
   GetTls(&addr, &size);
   return size;
diff --git a/lib/sanitizer_common/sanitizer_platform.h b/lib/sanitizer_common/sanitizer_platform.h
index 841cceb..542aa9a 100644
--- a/lib/sanitizer_common/sanitizer_platform.h
+++ b/lib/sanitizer_common/sanitizer_platform.h
@@ -81,6 +81,13 @@
 # define SANITIZER_X32 0
 #endif
 
+
+#if defined(__linux__) && !defined(__GLIBC__)
+# define SANITIZER_NONGNU 1
+#else
+# define SANITIZER_NONGNU 0
+#endif
+
 // By default we allow to use SizeClassAllocator64 on 64-bit platform.
 // But in some cases (e.g. AArch64's 39-bit address space) SizeClassAllocator64
 // does not work well and we need to fallback to SizeClassAllocator32.
diff --git a/lib/sanitizer_common/sanitizer_platform_interceptors.h b/lib/sanitizer_common/sanitizer_platform_interceptors.h
index 430ad48..728693b 100644
--- a/lib/sanitizer_common/sanitizer_platform_interceptors.h
+++ b/lib/sanitizer_common/sanitizer_platform_interceptors.h
@@ -23,7 +23,7 @@
 # define SI_NOT_WINDOWS 0
 #endif
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 # define SI_LINUX_NOT_ANDROID 1
 #else
 # define SI_LINUX_NOT_ANDROID 0
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
index b642cba..e5eb853 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -140,12 +140,14 @@ typedef struct user_fpregs elf_fpregset_t;
 
 #if SANITIZER_LINUX && !SANITIZER_ANDROID
 #include <glob.h>
-#include <obstack.h>
+#  if !SANITIZER_NONGNU
+#    include <obstack.h>
+#  endif
 #include <mqueue.h>
-#include <net/if_ppp.h>
-#include <netax25/ax25.h>
-#include <netipx/ipx.h>
-#include <netrom/netrom.h>
+#include <linux/if_ppp.h>
+#include <linux/ax25.h>
+#include <linux/ipx.h>
+#include <linux/netrom.h>
 #if HAVE_RPC_XDR_H
 # include <rpc/xdr.h>
 #elif HAVE_TIRPC_RPC_XDR_H
@@ -161,7 +163,8 @@ typedef struct user_fpregs elf_fpregset_t;
 # include <sys/procfs.h>
 #endif
 #include <sys/user.h>
-#include <sys/ustat.h>
+// #include <sys/ustat.h>
+#include <sys/statfs.h>
 #include <linux/cyclades.h>
 #include <linux/if_eql.h>
 #include <linux/if_plip.h>
@@ -253,7 +256,7 @@ namespace __sanitizer {
   unsigned struct_itimerspec_sz = sizeof(struct itimerspec);
 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   unsigned struct_ustat_sz = sizeof(struct ustat);
   unsigned struct_rlimit64_sz = sizeof(struct rlimit64);
   unsigned struct_statvfs64_sz = sizeof(struct statvfs64);
@@ -304,7 +307,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(ElfW(Phdr));
 unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
 #endif
 
-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
+#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   int glob_nomatch = GLOB_NOMATCH;
   int glob_altdirfunc = GLOB_ALTDIRFUNC;
 #endif
@@ -393,7 +396,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   unsigned struct_termios_sz = sizeof(struct termios);
   unsigned struct_winsize_sz = sizeof(struct winsize);
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_NONGNU
   unsigned struct_arpreq_sz = sizeof(struct arpreq);
   unsigned struct_cdrom_msf_sz = sizeof(struct cdrom_msf);
   unsigned struct_cdrom_multisession_sz = sizeof(struct cdrom_multisession);
@@ -443,7 +446,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   unsigned struct_vt_mode_sz = sizeof(struct vt_mode);
 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   unsigned struct_ax25_parms_struct_sz = sizeof(struct ax25_parms_struct);
   unsigned struct_cyclades_monitor_sz = sizeof(struct cyclades_monitor);
 #if EV_VERSION > (0x010000)
@@ -811,7 +814,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   unsigned IOCTL_VT_WAITACTIVE = VT_WAITACTIVE;
 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   unsigned IOCTL_CYGETDEFTHRESH = CYGETDEFTHRESH;
   unsigned IOCTL_CYGETDEFTIMEOUT = CYGETDEFTIMEOUT;
   unsigned IOCTL_CYGETMON = CYGETMON;
@@ -972,7 +975,7 @@ CHECK_SIZE_AND_OFFSET(dl_phdr_info, dlpi_phdr);
 CHECK_SIZE_AND_OFFSET(dl_phdr_info, dlpi_phnum);
 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
 
-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
+#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 CHECK_TYPE_SIZE(glob_t);
 CHECK_SIZE_AND_OFFSET(glob_t, gl_pathc);
 CHECK_SIZE_AND_OFFSET(glob_t, gl_pathv);
@@ -1006,6 +1009,7 @@ CHECK_TYPE_SIZE(iovec);
 CHECK_SIZE_AND_OFFSET(iovec, iov_base);
 CHECK_SIZE_AND_OFFSET(iovec, iov_len);
 
+#if !SANITIZER_NONGNU
 CHECK_TYPE_SIZE(msghdr);
 CHECK_SIZE_AND_OFFSET(msghdr, msg_name);
 CHECK_SIZE_AND_OFFSET(msghdr, msg_namelen);
@@ -1019,6 +1023,7 @@ CHECK_TYPE_SIZE(cmsghdr);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_len);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_level);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_type);
+#endif
 
 COMPILER_CHECK(sizeof(__sanitizer_dirent) <= sizeof(dirent));
 CHECK_SIZE_AND_OFFSET(dirent, d_ino);
@@ -1114,7 +1119,7 @@ CHECK_SIZE_AND_OFFSET(mntent, mnt_passno);
 
 CHECK_TYPE_SIZE(ether_addr);
 
-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
+#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 CHECK_TYPE_SIZE(ipc_perm);
 # if SANITIZER_FREEBSD
 CHECK_SIZE_AND_OFFSET(ipc_perm, key);
@@ -1178,7 +1183,7 @@ CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_dstaddr);
 CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_data);
 #endif
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_NONGNU
 COMPILER_CHECK(sizeof(__sanitizer_mallinfo) == sizeof(struct mallinfo));
 #endif
 
@@ -1228,7 +1233,7 @@ COMPILER_CHECK(__sanitizer_XDR_DECODE == XDR_DECODE);
 COMPILER_CHECK(__sanitizer_XDR_FREE == XDR_FREE);
 #endif
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 COMPILER_CHECK(sizeof(__sanitizer_FILE) <= sizeof(FILE));
 CHECK_SIZE_AND_OFFSET(FILE, _flags);
 CHECK_SIZE_AND_OFFSET(FILE, _IO_read_ptr);
@@ -1247,7 +1252,7 @@ CHECK_SIZE_AND_OFFSET(FILE, _chain);
 CHECK_SIZE_AND_OFFSET(FILE, _fileno);
 #endif
 
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
 COMPILER_CHECK(sizeof(__sanitizer__obstack_chunk) <= sizeof(_obstack_chunk));
 CHECK_SIZE_AND_OFFSET(_obstack_chunk, limit);
 CHECK_SIZE_AND_OFFSET(_obstack_chunk, prev);
diff --git a/lib/tsan/rtl/tsan_platform_linux.cc b/lib/tsan/rtl/tsan_platform_linux.cc
index 6602561..2c4d59b 100644
--- a/lib/tsan/rtl/tsan_platform_linux.cc
+++ b/lib/tsan/rtl/tsan_platform_linux.cc
@@ -309,7 +309,7 @@ bool IsGlobalVar(uptr addr) {
 // This is required to properly "close" the fds, because we do not see internal
 // closes within glibc. The code is a pure hack.
 int ExtractResolvFDs(void *state, int *fds, int nfd) {
-#if SANITIZER_LINUX && !SANITIZER_ANDROID
+#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
   int cnt = 0;
   __res_state *statp = (__res_state*)state;
   for (int i = 0; i < MAXNS && cnt < nfd; i++) {