MoonchildProductions#1251 - Part 7: All the posix_m* memory-related stuff, gathered together.

https://bugzilla.mozilla.org/show_bug.cgi?id=1158445
https://bugzilla.mozilla.org/show_bug.cgi?id=963983
https://bugzilla.mozilla.org/show_bug.cgi?id=1542758

Solaris madvise and malign don't perfectly map to their POSIX counterparts, and some Linux versions (especially Android) don't define the POSIX counterparts at all, so options are limited. Ideally posix_madvise and posix_malign should be the safer and more portable options for all platforms.

build/moz.configure/memory.configure

@@ -58,6 +58,9 @@ def jemalloc_os_define(jemalloc, target):
             return 'MOZ_MEMORY_DARWIN'
         if target.kernel in ('kFreeBSD', 'FreeBSD', 'NetBSD'):
             return 'MOZ_MEMORY_BSD'
+        if target.kernel == 'SunOS':
+            return 'MOZ_MEMORY_SOLARIS'
+
         die('--enable-jemalloc is not supported on %s', target.kernel)
 
 set_define(jemalloc_os_define, '1')

js/src/gc/Memory.cpp

@@ -678,7 +678,11 @@ MarkPagesUnused(void* p, size_t size)
         return false;
 
     MOZ_ASSERT(OffsetFromAligned(p, pageSize) == 0);
-    int result = madvise(p, size, MADV_DONTNEED);
+#if defined(XP_SOLARIS)
+     int result = posix_madvise(p, size, POSIX_MADV_DONTNEED);
+#else
+     int result = madvise(p, size, MADV_DONTNEED);
+#endif
     return result != -1;
 }
 

memory/mozjemalloc/jemalloc.c

@@ -413,8 +413,8 @@ void *_mmap(void *addr, size_t length, int prot, int flags,
 #endif
 #endif
 
-#if defined(MOZ_MEMORY_SOLARIS && defined(MAP_ALIGN) && !defined(JEMALLOC_NEVER_USES_MAP_ALIGN)
-#define JEMALLOC_USES_MAP_ALIGN       /* Required on Solaris 10. Might improve performance elsewhere. */
+#if defined(MOZ_MEMORY_SOLARIS) && defined(MAP_ALIGN) && !defined(JEMALLOC_NEVER_USES_MAP_ALIGN)
+#define JEMALLOC_USES_MAP_ALIGN	 /* Required on Solaris 10. Might improve performance elsewhere. */
 #endif
 
 #ifndef __DECONST
@@ -1043,7 +1043,7 @@ static const bool config_recycle = false;
  * will abort.
  * Platform specific page size conditions copied from js/public/HeapAPI.h
  */
-#if (defined(__FreeBSD__)) && \
+#if (defined(SOLARIS) || defined(__FreeBSD__)) && \
     (defined(__sparc) || defined(__sparcv9) || defined(__ia64))
 #define pagesize_2pow			((size_t) 13)
 #elif defined(__powerpc64__)
@@ -2651,8 +2651,13 @@ pages_purge(void *addr, size_t length)
 #      define JEMALLOC_MADV_PURGE MADV_FREE
 #      define JEMALLOC_MADV_ZEROS false
 #    endif
+#ifdef MOZ_MEMORY_SOLARIS
+        int err = posix_madvise(addr, length, JEMALLOC_MADV_PURGE);
+	unzeroed = (JEMALLOC_MADV_ZEROS == false || err != 0);
+#else
 	int err = madvise(addr, length, JEMALLOC_MADV_PURGE);
 	unzeroed = (JEMALLOC_MADV_ZEROS == false || err != 0);
+#endif
 #    undef JEMALLOC_MADV_PURGE
 #    undef JEMALLOC_MADV_ZEROS
 #  endif
@@ -3608,9 +3613,14 @@ arena_purge(arena_t *arena, bool all)
 #endif
 
 #ifndef MALLOC_DECOMMIT
+#ifdef MOZ_MEMORY_SOLARIS
+        posix_madvise((void*)((uintptr_t)chunk + (i << pagesize_2pow)),
+                (npages << pagesize_2pow),MADV_FREE);
+#else
 				madvise((void *)((uintptr_t)chunk + (i <<
 				    pagesize_2pow)), (npages << pagesize_2pow),
 				    MADV_FREE);
+#endif
 #  ifdef MALLOC_DOUBLE_PURGE
 				madvised = true;
 #  endif
@@ -5136,7 +5146,7 @@ malloc_ncpus(void)
 static inline unsigned
 malloc_ncpus(void)
 {
-      return sysconf(_SC_NPROCESSORS_ONLN);
+	return sysconf(_SC_NPROCESSORS_ONLN);
 }
 #elif (defined(MOZ_MEMORY_WINDOWS))
 static inline unsigned

mfbt/Poison.cpp

@@ -129,7 +129,11 @@ ReleaseRegion(void* aRegion, uintptr_t aSize)
 static bool
 ProbeRegion(uintptr_t aRegion, uintptr_t aSize)
 {
+#ifdef XP_SOLARIS	
+  if (posix_madvise(reinterpret_cast<void*>(aRegion), aSize, POSIX_MADV_NORMAL)) {
+#else
   if (madvise(reinterpret_cast<void*>(aRegion), aSize, MADV_NORMAL)) {
+#endif	  
     return true;
   } else {
     return false;

mfbt/tests/TestPoisonArea.cpp

@@ -266,7 +266,11 @@ ReleaseRegion(void* aPage)
 static bool
 ProbeRegion(uintptr_t aPage)
 {
+#ifdef XP_SOLARIS	
+  return !!posix_madvise(reinterpret_cast<void*>(aPage), PageSize(), POSIX_MADV_NORMAL);
+#else
   return !!madvise(reinterpret_cast<void*>(aPage), PageSize(), MADV_NORMAL);
+#endif  
 }
 
 static int

modules/libjar/nsZipArchive.cpp

@@ -688,7 +688,9 @@ MOZ_WIN_MEM_TRY_BEGIN
     // Success means optimized jar layout from bug 559961 is in effect
     uint32_t readaheadLength = xtolong(startp);
     if (readaheadLength) {
-#if defined(XP_UNIX)
+#if defined(XP_SOLARIS)
+      posix_madvise(const_cast<uint8_t*>(startp), readaheadLength, POSIX_MADV_WILLNEED);
+#elif defined(XP_UNIX)
       madvise(const_cast<uint8_t*>(startp), readaheadLength, MADV_WILLNEED);
 #elif defined(XP_WIN)
       if (aFd) {