[CompilerRT] Fix build of compiler-rt with musl

Use the correct types for OFF_T, __sanitizer_time_t and
__sanitizer_dirent and forward time_t related functions
 to fix using compiler-rt with 32-bit musl libc.

Also redirect the time_t functions that are affected by
https://musl.libc.org/time64.html to use their 64-bit
ABI names.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D119358

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

@@ -132,6 +132,76 @@ extern const short *_toupper_tab_;
 extern const short *_tolower_tab_;
 #endif
 
+#if SANITIZER_MUSL && \
+  (defined(__i386__) || defined(__arm__) || SANITIZER_MIPS32 || SANITIZER_PPC32)
+// musl 1.2.0 on existing 32-bit architectures uses new symbol names for the
+// time-related functions that take 64-bit time_t values.  See
+// https://musl.libc.org/time64.html
+#define adjtime __adjtime64
+#define adjtimex __adjtimex_time64
+#define aio_suspend __aio_suspend_time64
+#define clock_adjtime __clock_adjtime64
+#define clock_getres __clock_getres_time64
+#define clock_gettime __clock_gettime64
+#define clock_nanosleep __clock_nanosleep_time64
+#define clock_settime __clock_settime64
+#define cnd_timedwait __cnd_timedwait_time64
+#define ctime __ctime64
+#define ctime_r __ctime64_r
+#define difftime __difftime64
+#define dlsym __dlsym_time64
+#define fstatat __fstatat_time64
+#define fstat __fstat_time64
+#define ftime __ftime64
+#define futimens __futimens_time64
+#define futimesat __futimesat_time64
+#define futimes __futimes_time64
+#define getitimer __getitimer_time64
+#define getrusage __getrusage_time64
+#define gettimeofday __gettimeofday_time64
+#define gmtime __gmtime64
+#define gmtime_r __gmtime64_r
+#define localtime __localtime64
+#define localtime_r __localtime64_r
+#define lstat __lstat_time64
+#define lutimes __lutimes_time64
+#define mktime __mktime64
+#define mq_timedreceive __mq_timedreceive_time64
+#define mq_timedsend __mq_timedsend_time64
+#define mtx_timedlock __mtx_timedlock_time64
+#define nanosleep __nanosleep_time64
+#define ppoll __ppoll_time64
+#define pselect __pselect_time64
+#define pthread_cond_timedwait __pthread_cond_timedwait_time64
+#define pthread_mutex_timedlock __pthread_mutex_timedlock_time64
+#define pthread_rwlock_timedrdlock __pthread_rwlock_timedrdlock_time64
+#define pthread_rwlock_timedwrlock __pthread_rwlock_timedwrlock_time64
+#define pthread_timedjoin_np __pthread_timedjoin_np_time64
+#define recvmmsg __recvmmsg_time64
+#define sched_rr_get_interval __sched_rr_get_interval_time64
+#define select __select_time64
+#define semtimedop __semtimedop_time64
+#define sem_timedwait __sem_timedwait_time64
+#define setitimer __setitimer_time64
+#define settimeofday __settimeofday_time64
+#define sigtimedwait __sigtimedwait_time64
+#define stat __stat_time64
+#define stime __stime64
+#define thrd_sleep __thrd_sleep_time64
+#define timegm __timegm_time64
+#define timerfd_gettime __timerfd_gettime64
+#define timerfd_settime __timerfd_settime64
+#define timer_gettime __timer_gettime64
+#define timer_settime __timer_settime64
+#define timespec_get __timespec_get_time64
+#define time __time64
+#define utimensat __utimensat_time64
+#define utimes __utimes_time64
+#define utime __utime64
+#define wait3 __wait3_time64
+#define wait4 __wait4_time64
+#endif
+
 // Platform-specific options.
 #if SANITIZER_MAC
 #define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE 0

compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h

@@ -179,6 +179,7 @@ typedef int pid_t;
 
 #if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_MAC ||             \
     (SANITIZER_SOLARIS && (defined(_LP64) || _FILE_OFFSET_BITS == 64)) || \
+    (SANITIZER_LINUX && !SANITIZER_GLIBC && !SANITIZER_ANDROID) ||        \
     (SANITIZER_LINUX && (defined(__x86_64__) || defined(__hexagon__)))
 typedef u64 OFF_T;
 #else

compiler-rt/lib/sanitizer_common/sanitizer_platform.h

@@ -116,6 +116,13 @@
 #  define SANITIZER_FUCHSIA 0
 #endif
 
+// Assume linux that is not glibc or android is musl libc.
+#if SANITIZER_LINUX && !SANITIZER_GLIBC && !SANITIZER_ANDROID
+#  define SANITIZER_MUSL 1
+#else
+#  define SANITIZER_MUSL 0
+#endif
+
 #define SANITIZER_POSIX                                     \
   (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || \
    SANITIZER_NETBSD || SANITIZER_SOLARIS)

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h

@@ -370,7 +370,8 @@ struct __sanitizer_group {
   char **gr_mem;
 };
 
-#  if (defined(__x86_64__) && !defined(_LP64)) || defined(__hexagon__)
+#  if (SANITIZER_LINUX && !SANITIZER_GLIBC && !SANITIZER_ANDROID) || \
+      (defined(__x86_64__) && !defined(_LP64)) || defined(__hexagon__)
 typedef long long __sanitizer_time_t;
 #else
 typedef long __sanitizer_time_t;
@@ -478,7 +479,8 @@ struct __sanitizer_dirent {
   unsigned short d_reclen;
   // more fields that we don't care about
 };
-#  elif SANITIZER_ANDROID || defined(__x86_64__) || defined(__hexagon__)
+#  elif (SANITIZER_LINUX && !SANITIZER_GLIBC) || defined(__x86_64__) || \
+      defined(__hexagon__)
 struct __sanitizer_dirent {
   unsigned long long d_ino;
   unsigned long long d_off;