diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
@@ -187,6 +187,10 @@
 int internal_mprotect(void *addr, uptr length, int prot) {
   return internal_syscall(SYSCALL(mprotect), (uptr)addr, length, prot);
 }
+
+int internal_madvise(uptr addr, uptr length, int advice) {
+  return internal_syscall(SYSCALL(madvise), addr, length, advice);
+}
 #endif
 
 uptr internal_close(fd_t fd) {
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
@@ -137,6 +137,10 @@
   return mprotect(addr, length, prot);
 }
 
+int internal_madvise(uptr addr, uptr length, int advice) {
+  return madvise((void *)addr, length, advice);
+}
+
 uptr internal_close(fd_t fd) {
   return close(fd);
 }
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_netbsd.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_netbsd.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_netbsd.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_netbsd.cpp
@@ -110,6 +110,11 @@
   return _REAL(mprotect, addr, length, prot);
 }
 
+int internal_madvise(uptr addr, uptr length, int advice) {
+  DEFINE__REAL(int, madvise, void *a, uptr b, int c);
+  return _REAL(madvise, (void *)addr, length, advice);
+}
+
 uptr internal_close(fd_t fd) {
   CHECK(&_sys_close);
   return _sys_close(fd);
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_openbsd.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_openbsd.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_openbsd.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_openbsd.cpp
@@ -52,6 +52,10 @@
   return mprotect(addr, length, prot);
 }
 
+int internal_madvise(uptr addr, uptr length, int advice) {
+  return madvise((void *)addr, length, advice);
+}
+
 int internal_sysctlbyname(const char *sname, void *oldp, uptr *oldlenp,
                           const void *newp, uptr newlen) {
   Printf("internal_sysctlbyname not implemented for OpenBSD");
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix.h b/compiler-rt/lib/sanitizer_common/sanitizer_posix.h
--- a/compiler-rt/lib/sanitizer_common/sanitizer_posix.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix.h
@@ -42,6 +42,7 @@
                    int fd, u64 offset);
 uptr internal_munmap(void *addr, uptr length);
 int internal_mprotect(void *addr, uptr length, int prot);
+int internal_madvise(uptr addr, uptr length, int advice);
 
 // OS
 uptr internal_filesize(fd_t fd);  // -1 on error.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
@@ -44,12 +44,6 @@
 #define MAP_NORESERVE 0
 #endif
 
-#if SANITIZER_SOLARIS
-// Illumos' declaration of madvie cannot be made visible if _XOPEN_SOURCE
-// is defined as g++ does on Solaris.
-extern "C" int madvise(void *, size_t, int);
-#endif
-
 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
 
 namespace __sanitizer {
@@ -67,27 +61,24 @@
   uptr beg_aligned = RoundUpTo(beg, page_size);
   uptr end_aligned = RoundDownTo(end, page_size);
   if (beg_aligned < end_aligned)
-    // In the default Solaris compilation environment, madvise() is declared
-    // to take a caddr_t arg; casting it to void * results in an invalid
-    // conversion error, so use char * instead.
-    madvise((char *)beg_aligned, end_aligned - beg_aligned,
-            SANITIZER_MADVISE_DONTNEED);
+    internal_madvise(beg_aligned, end_aligned - beg_aligned,
+                     SANITIZER_MADVISE_DONTNEED);
 }
 
 void SetShadowRegionHugePageMode(uptr addr, uptr size) {
 #ifdef MADV_NOHUGEPAGE  // May not be defined on old systems.
   if (common_flags()->no_huge_pages_for_shadow)
-    madvise((char *)addr, size, MADV_NOHUGEPAGE);
+    internal_madvise(addr, size, MADV_NOHUGEPAGE);
   else
-    madvise((char *)addr, size, MADV_HUGEPAGE);
+    internal_madvise(addr, size, MADV_HUGEPAGE);
 #endif  // MADV_NOHUGEPAGE
 }
 
 bool DontDumpShadowMemory(uptr addr, uptr length) {
 #if defined(MADV_DONTDUMP)
-  return madvise((char *)addr, length, MADV_DONTDUMP) == 0;
+  return internal_madvise(addr, length, MADV_DONTDUMP) == 0;
 #elif defined(MADV_NOCORE)
-  return madvise((char *)addr, length, MADV_NOCORE) == 0;
+  return internal_madvise(addr, length, MADV_NOCORE) == 0;
 #else
   return true;
 #endif  // MADV_DONTDUMP
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_solaris.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_solaris.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_solaris.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_solaris.cpp
@@ -74,6 +74,14 @@
   return _REAL(mprotect)(addr, length, prot);
 }
 
+// Illumos' declaration of madvise cannot be made visible if _XOPEN_SOURCE
+// is defined as g++ does on Solaris.
+extern "C" int madvise(caddr_t, size_t, int);
+
+int internal_madvise(uptr addr, uptr length, int advice) {
+  return madvise((caddr_t)addr, length, advice);
+}
+
 DECLARE__REAL_AND_INTERNAL(uptr, close, fd_t fd) {
   return _REAL(close)(fd);
 }