Restoring authorship annotation for <[email protected]>. Commit 2 of 2.

1 files changed, 648 insertions, 648 deletions

diff --git a/contrib/libs/jemalloc/src/pages.c b/contrib/libs/jemalloc/src/pages.c
index 59912113be0..13de27a0087 100644
--- a/contrib/libs/jemalloc/src/pages.c
+++ b/contrib/libs/jemalloc/src/pages.c
@@ -1,649 +1,649 @@
-#define JEMALLOC_PAGES_C_ 
-#include "jemalloc/internal/jemalloc_preamble.h" 
- 
-#include "jemalloc/internal/pages.h" 
- 
-#include "jemalloc/internal/jemalloc_internal_includes.h" 
- 
-#include "jemalloc/internal/assert.h" 
-#include "jemalloc/internal/malloc_io.h" 
- 
-#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT 
-#include <sys/sysctl.h> 
-#ifdef __FreeBSD__ 
-#include <vm/vm_param.h> 
-#endif 
-#endif 
- 
-/******************************************************************************/ 
-/* Data. */ 
- 
-/* Actual operating system page size, detected during bootstrap, <= PAGE. */ 
-static size_t	os_page; 
- 
-#ifndef _WIN32 
-#  define PAGES_PROT_COMMIT (PROT_READ | PROT_WRITE) 
-#  define PAGES_PROT_DECOMMIT (PROT_NONE) 
-static int	mmap_flags; 
-#endif 
-static bool	os_overcommits; 
- 
-const char *thp_mode_names[] = { 
-	"default", 
-	"always", 
-	"never", 
-	"not supported" 
-}; 
-thp_mode_t opt_thp = THP_MODE_DEFAULT; 
-thp_mode_t init_system_thp_mode; 
- 
-/* Runtime support for lazy purge. Irrelevant when !pages_can_purge_lazy. */ 
-static bool pages_can_purge_lazy_runtime = true; 
- 
-/******************************************************************************/ 
-/* 
- * Function prototypes for static functions that are referenced prior to 
- * definition. 
- */ 
- 
-static void os_pages_unmap(void *addr, size_t size); 
- 
-/******************************************************************************/ 
- 
-static void * 
-os_pages_map(void *addr, size_t size, size_t alignment, bool *commit) { 
-	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr); 
-	assert(ALIGNMENT_CEILING(size, os_page) == size); 
-	assert(size != 0); 
- 
-	if (os_overcommits) { 
-		*commit = true; 
-	} 
- 
-	void *ret; 
-#ifdef _WIN32 
-	/* 
-	 * If VirtualAlloc can't allocate at the given address when one is 
-	 * given, it fails and returns NULL. 
-	 */ 
-	ret = VirtualAlloc(addr, size, MEM_RESERVE | (*commit ? MEM_COMMIT : 0), 
-	    PAGE_READWRITE); 
-#else 
-	/* 
-	 * We don't use MAP_FIXED here, because it can cause the *replacement* 
-	 * of existing mappings, and we only want to create new mappings. 
-	 */ 
-	{ 
-		int prot = *commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT; 
- 
-		ret = mmap(addr, size, prot, mmap_flags, -1, 0); 
-	} 
-	assert(ret != NULL); 
- 
-	if (ret == MAP_FAILED) { 
-		ret = NULL; 
-	} else if (addr != NULL && ret != addr) { 
-		/* 
-		 * We succeeded in mapping memory, but not in the right place. 
-		 */ 
-		os_pages_unmap(ret, size); 
-		ret = NULL; 
-	} 
-#endif 
-	assert(ret == NULL || (addr == NULL && ret != addr) || (addr != NULL && 
-	    ret == addr)); 
-	return ret; 
-} 
- 
-static void * 
-os_pages_trim(void *addr, size_t alloc_size, size_t leadsize, size_t size, 
-    bool *commit) { 
-	void *ret = (void *)((uintptr_t)addr + leadsize); 
- 
-	assert(alloc_size >= leadsize + size); 
-#ifdef _WIN32 
-	os_pages_unmap(addr, alloc_size); 
-	void *new_addr = os_pages_map(ret, size, PAGE, commit); 
-	if (new_addr == ret) { 
-		return ret; 
-	} 
-	if (new_addr != NULL) { 
-		os_pages_unmap(new_addr, size); 
-	} 
-	return NULL; 
-#else 
-	size_t trailsize = alloc_size - leadsize - size; 
- 
-	if (leadsize != 0) { 
-		os_pages_unmap(addr, leadsize); 
-	} 
-	if (trailsize != 0) { 
-		os_pages_unmap((void *)((uintptr_t)ret + size), trailsize); 
-	} 
-	return ret; 
-#endif 
-} 
- 
-static void 
-os_pages_unmap(void *addr, size_t size) { 
-	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr); 
-	assert(ALIGNMENT_CEILING(size, os_page) == size); 
- 
-#ifdef _WIN32 
-	if (VirtualFree(addr, 0, MEM_RELEASE) == 0) 
-#else 
-	if (munmap(addr, size) == -1) 
-#endif 
-	{ 
-		char buf[BUFERROR_BUF]; 
- 
-		buferror(get_errno(), buf, sizeof(buf)); 
-		malloc_printf("<jemalloc>: Error in " 
-#ifdef _WIN32 
-		    "VirtualFree" 
-#else 
-		    "munmap" 
-#endif 
-		    "(): %s\n", buf); 
-		if (opt_abort) { 
-			abort(); 
-		} 
-	} 
-} 
- 
-static void * 
-pages_map_slow(size_t size, size_t alignment, bool *commit) { 
-	size_t alloc_size = size + alignment - os_page; 
-	/* Beware size_t wrap-around. */ 
-	if (alloc_size < size) { 
-		return NULL; 
-	} 
- 
-	void *ret; 
-	do { 
-		void *pages = os_pages_map(NULL, alloc_size, alignment, commit); 
-		if (pages == NULL) { 
-			return NULL; 
-		} 
-		size_t leadsize = ALIGNMENT_CEILING((uintptr_t)pages, alignment) 
-		    - (uintptr_t)pages; 
-		ret = os_pages_trim(pages, alloc_size, leadsize, size, commit); 
-	} while (ret == NULL); 
- 
-	assert(ret != NULL); 
-	assert(PAGE_ADDR2BASE(ret) == ret); 
-	return ret; 
-} 
- 
-void * 
-pages_map(void *addr, size_t size, size_t alignment, bool *commit) { 
-	assert(alignment >= PAGE); 
-	assert(ALIGNMENT_ADDR2BASE(addr, alignment) == addr); 
- 
-#if defined(__FreeBSD__) && defined(MAP_EXCL) 
-	/* 
-	 * FreeBSD has mechanisms both to mmap at specific address without 
-	 * touching existing mappings, and to mmap with specific alignment. 
-	 */ 
-	{ 
-		if (os_overcommits) { 
-			*commit = true; 
-		} 
- 
-		int prot = *commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT; 
-		int flags = mmap_flags; 
- 
-		if (addr != NULL) { 
-			flags |= MAP_FIXED | MAP_EXCL; 
-		} else { 
-			unsigned alignment_bits = ffs_zu(alignment); 
-			assert(alignment_bits > 1); 
-			flags |= MAP_ALIGNED(alignment_bits - 1); 
-		} 
- 
-		void *ret = mmap(addr, size, prot, flags, -1, 0); 
-		if (ret == MAP_FAILED) { 
-			ret = NULL; 
-		} 
- 
-		return ret; 
-	} 
-#endif 
-	/* 
-	 * Ideally, there would be a way to specify alignment to mmap() (like 
-	 * NetBSD has), but in the absence of such a feature, we have to work 
-	 * hard to efficiently create aligned mappings.  The reliable, but 
-	 * slow method is to create a mapping that is over-sized, then trim the 
-	 * excess.  However, that always results in one or two calls to 
-	 * os_pages_unmap(), and it can leave holes in the process's virtual 
-	 * memory map if memory grows downward. 
-	 * 
-	 * Optimistically try mapping precisely the right amount before falling 
-	 * back to the slow method, with the expectation that the optimistic 
-	 * approach works most of the time. 
-	 */ 
- 
-	void *ret = os_pages_map(addr, size, os_page, commit); 
-	if (ret == NULL || ret == addr) { 
-		return ret; 
-	} 
-	assert(addr == NULL); 
-	if (ALIGNMENT_ADDR2OFFSET(ret, alignment) != 0) { 
-		os_pages_unmap(ret, size); 
-		return pages_map_slow(size, alignment, commit); 
-	} 
- 
-	assert(PAGE_ADDR2BASE(ret) == ret); 
-	return ret; 
-} 
- 
-void 
-pages_unmap(void *addr, size_t size) { 
-	assert(PAGE_ADDR2BASE(addr) == addr); 
-	assert(PAGE_CEILING(size) == size); 
- 
-	os_pages_unmap(addr, size); 
-} 
- 
-static bool 
-pages_commit_impl(void *addr, size_t size, bool commit) { 
-	assert(PAGE_ADDR2BASE(addr) == addr); 
-	assert(PAGE_CEILING(size) == size); 
- 
-	if (os_overcommits) { 
-		return true; 
-	} 
- 
-#ifdef _WIN32 
-	return (commit ? (addr != VirtualAlloc(addr, size, MEM_COMMIT, 
-	    PAGE_READWRITE)) : (!VirtualFree(addr, size, MEM_DECOMMIT))); 
-#else 
-	{ 
-		int prot = commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT; 
-		void *result = mmap(addr, size, prot, mmap_flags | MAP_FIXED, 
-		    -1, 0); 
-		if (result == MAP_FAILED) { 
-			return true; 
-		} 
-		if (result != addr) { 
-			/* 
-			 * We succeeded in mapping memory, but not in the right 
-			 * place. 
-			 */ 
-			os_pages_unmap(result, size); 
-			return true; 
-		} 
-		return false; 
-	} 
-#endif 
-} 
- 
-bool 
-pages_commit(void *addr, size_t size) { 
-	return pages_commit_impl(addr, size, true); 
-} 
- 
-bool 
-pages_decommit(void *addr, size_t size) { 
-	return pages_commit_impl(addr, size, false); 
-} 
- 
-bool 
-pages_purge_lazy(void *addr, size_t size) { 
-	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr); 
-	assert(PAGE_CEILING(size) == size); 
- 
-	if (!pages_can_purge_lazy) { 
-		return true; 
-	} 
-	if (!pages_can_purge_lazy_runtime) { 
-		/* 
-		 * Built with lazy purge enabled, but detected it was not 
-		 * supported on the current system. 
-		 */ 
-		return true; 
-	} 
- 
-#ifdef _WIN32 
-	VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE); 
-	return false; 
-#elif defined(JEMALLOC_PURGE_MADVISE_FREE) 
-	return (madvise(addr, size, 
-#  ifdef MADV_FREE 
-	    MADV_FREE 
-#  else 
-	    JEMALLOC_MADV_FREE 
-#  endif 
-	    ) != 0); 
-#elif defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \ 
-    !defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS) 
-	return (madvise(addr, size, MADV_DONTNEED) != 0); 
-#else 
-	not_reached(); 
-#endif 
-} 
- 
-bool 
-pages_purge_forced(void *addr, size_t size) { 
-	assert(PAGE_ADDR2BASE(addr) == addr); 
-	assert(PAGE_CEILING(size) == size); 
- 
-	if (!pages_can_purge_forced) { 
-		return true; 
-	} 
- 
-#if defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \ 
-    defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS) 
-	return (madvise(addr, size, MADV_DONTNEED) != 0); 
-#elif defined(JEMALLOC_MAPS_COALESCE) 
-	/* Try to overlay a new demand-zeroed mapping. */ 
-	return pages_commit(addr, size); 
-#else 
-	not_reached(); 
-#endif 
-} 
- 
-static bool 
-pages_huge_impl(void *addr, size_t size, bool aligned) { 
-	if (aligned) { 
-		assert(HUGEPAGE_ADDR2BASE(addr) == addr); 
-		assert(HUGEPAGE_CEILING(size) == size); 
-	} 
-#ifdef JEMALLOC_HAVE_MADVISE_HUGE 
-	return (madvise(addr, size, MADV_HUGEPAGE) != 0); 
-#else 
-	return true; 
-#endif 
-} 
- 
-bool 
-pages_huge(void *addr, size_t size) { 
-	return pages_huge_impl(addr, size, true); 
-} 
- 
-static bool 
-pages_huge_unaligned(void *addr, size_t size) { 
-	return pages_huge_impl(addr, size, false); 
-} 
- 
-static bool 
-pages_nohuge_impl(void *addr, size_t size, bool aligned) { 
-	if (aligned) { 
-		assert(HUGEPAGE_ADDR2BASE(addr) == addr); 
-		assert(HUGEPAGE_CEILING(size) == size); 
-	} 
- 
-#ifdef JEMALLOC_HAVE_MADVISE_HUGE 
-	return (madvise(addr, size, MADV_NOHUGEPAGE) != 0); 
-#else 
-	return false; 
-#endif 
-} 
- 
-bool 
-pages_nohuge(void *addr, size_t size) { 
-	return pages_nohuge_impl(addr, size, true); 
-} 
- 
-static bool 
-pages_nohuge_unaligned(void *addr, size_t size) { 
-	return pages_nohuge_impl(addr, size, false); 
-} 
- 
-bool 
-pages_dontdump(void *addr, size_t size) { 
-	assert(PAGE_ADDR2BASE(addr) == addr); 
-	assert(PAGE_CEILING(size) == size); 
-#ifdef JEMALLOC_MADVISE_DONTDUMP 
-	return madvise(addr, size, MADV_DONTDUMP) != 0; 
-#else 
-	return false; 
-#endif 
-} 
- 
-bool 
-pages_dodump(void *addr, size_t size) { 
-	assert(PAGE_ADDR2BASE(addr) == addr); 
-	assert(PAGE_CEILING(size) == size); 
-#ifdef JEMALLOC_MADVISE_DONTDUMP 
-	return madvise(addr, size, MADV_DODUMP) != 0; 
-#else 
-	return false; 
-#endif 
-} 
- 
- 
-static size_t 
-os_page_detect(void) { 
-#ifdef _WIN32 
-	SYSTEM_INFO si; 
-	GetSystemInfo(&si); 
-	return si.dwPageSize; 
-#elif defined(__FreeBSD__) 
-	/* 
-	 * This returns the value obtained from 
-	 * the auxv vector, avoiding a syscall. 
-	 */ 
-	return getpagesize(); 
-#else 
-	long result = sysconf(_SC_PAGESIZE); 
-	if (result == -1) { 
-		return LG_PAGE; 
-	} 
-	return (size_t)result; 
-#endif 
-} 
- 
-#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT 
-static bool 
-os_overcommits_sysctl(void) { 
-	int vm_overcommit; 
-	size_t sz; 
- 
-	sz = sizeof(vm_overcommit); 
-#if defined(__FreeBSD__) && defined(VM_OVERCOMMIT) 
-	int mib[2]; 
- 
-	mib[0] = CTL_VM; 
-	mib[1] = VM_OVERCOMMIT; 
-	if (sysctl(mib, 2, &vm_overcommit, &sz, NULL, 0) != 0) { 
-		return false; /* Error. */ 
-	} 
-#else 
-	if (sysctlbyname("vm.overcommit", &vm_overcommit, &sz, NULL, 0) != 0) { 
-		return false; /* Error. */ 
-	} 
-#endif 
- 
-	return ((vm_overcommit & 0x3) == 0); 
-} 
-#endif 
- 
-#ifdef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY 
-/* 
- * Use syscall(2) rather than {open,read,close}(2) when possible to avoid 
- * reentry during bootstrapping if another library has interposed system call 
- * wrappers. 
- */ 
-static bool 
-os_overcommits_proc(void) { 
-	int fd; 
-	char buf[1]; 
- 
-#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open) 
-	#if defined(O_CLOEXEC) 
-		fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY | 
-			O_CLOEXEC); 
-	#else 
-		fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY); 
-		if (fd != -1) { 
-			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); 
-		} 
-	#endif 
-#elif defined(JEMALLOC_USE_SYSCALL) && defined(SYS_openat) 
-	#if defined(O_CLOEXEC) 
-		fd = (int)syscall(SYS_openat, 
-			AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC); 
-	#else 
-		fd = (int)syscall(SYS_openat, 
-			AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY); 
-		if (fd != -1) { 
-			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); 
-		} 
-	#endif 
-#else 
-	#if defined(O_CLOEXEC) 
-		fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC); 
-	#else 
-		fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY); 
-		if (fd != -1) { 
-			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); 
-		} 
-	#endif 
-#endif 
- 
-	if (fd == -1) { 
-		return false; /* Error. */ 
-	} 
- 
-	ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf)); 
-#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close) 
-	syscall(SYS_close, fd); 
-#else 
-	close(fd); 
-#endif 
- 
-	if (nread < 1) { 
-		return false; /* Error. */ 
-	} 
-	/* 
-	 * /proc/sys/vm/overcommit_memory meanings: 
-	 * 0: Heuristic overcommit. 
-	 * 1: Always overcommit. 
-	 * 2: Never overcommit. 
-	 */ 
-	return (buf[0] == '0' || buf[0] == '1'); 
-} 
-#endif 
- 
-void 
-pages_set_thp_state (void *ptr, size_t size) { 
-	if (opt_thp == thp_mode_default || opt_thp == init_system_thp_mode) { 
-		return; 
-	} 
-	assert(opt_thp != thp_mode_not_supported && 
-	    init_system_thp_mode != thp_mode_not_supported); 
- 
-	if (opt_thp == thp_mode_always 
-	    && init_system_thp_mode != thp_mode_never) { 
-		assert(init_system_thp_mode == thp_mode_default); 
-		pages_huge_unaligned(ptr, size); 
-	} else if (opt_thp == thp_mode_never) { 
-		assert(init_system_thp_mode == thp_mode_default || 
-		    init_system_thp_mode == thp_mode_always); 
-		pages_nohuge_unaligned(ptr, size); 
-	} 
-} 
- 
-static void 
-init_thp_state(void) { 
-	if (!have_madvise_huge) { 
-		if (metadata_thp_enabled() && opt_abort) { 
-			malloc_write("<jemalloc>: no MADV_HUGEPAGE support\n"); 
-			abort(); 
-		} 
+#define JEMALLOC_PAGES_C_
+#include "jemalloc/internal/jemalloc_preamble.h"
+
+#include "jemalloc/internal/pages.h"
+
+#include "jemalloc/internal/jemalloc_internal_includes.h"
+
+#include "jemalloc/internal/assert.h"
+#include "jemalloc/internal/malloc_io.h"
+
+#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT
+#include <sys/sysctl.h>
+#ifdef __FreeBSD__
+#include <vm/vm_param.h>
+#endif
+#endif
+
+/******************************************************************************/
+/* Data. */
+
+/* Actual operating system page size, detected during bootstrap, <= PAGE. */
+static size_t	os_page;
+
+#ifndef _WIN32
+#  define PAGES_PROT_COMMIT (PROT_READ | PROT_WRITE)
+#  define PAGES_PROT_DECOMMIT (PROT_NONE)
+static int	mmap_flags;
+#endif
+static bool	os_overcommits;
+
+const char *thp_mode_names[] = {
+	"default",
+	"always",
+	"never",
+	"not supported"
+};
+thp_mode_t opt_thp = THP_MODE_DEFAULT;
+thp_mode_t init_system_thp_mode;
+
+/* Runtime support for lazy purge. Irrelevant when !pages_can_purge_lazy. */
+static bool pages_can_purge_lazy_runtime = true;
+
+/******************************************************************************/
+/*
+ * Function prototypes for static functions that are referenced prior to
+ * definition.
+ */
+
+static void os_pages_unmap(void *addr, size_t size);
+
+/******************************************************************************/
+
+static void *
+os_pages_map(void *addr, size_t size, size_t alignment, bool *commit) {
+	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr);
+	assert(ALIGNMENT_CEILING(size, os_page) == size);
+	assert(size != 0);
+
+	if (os_overcommits) {
+		*commit = true;
+	}
+
+	void *ret;
+#ifdef _WIN32
+	/*
+	 * If VirtualAlloc can't allocate at the given address when one is
+	 * given, it fails and returns NULL.
+	 */
+	ret = VirtualAlloc(addr, size, MEM_RESERVE | (*commit ? MEM_COMMIT : 0),
+	    PAGE_READWRITE);
+#else
+	/*
+	 * We don't use MAP_FIXED here, because it can cause the *replacement*
+	 * of existing mappings, and we only want to create new mappings.
+	 */
+	{
+		int prot = *commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT;
+
+		ret = mmap(addr, size, prot, mmap_flags, -1, 0);
+	}
+	assert(ret != NULL);
+
+	if (ret == MAP_FAILED) {
+		ret = NULL;
+	} else if (addr != NULL && ret != addr) {
+		/*
+		 * We succeeded in mapping memory, but not in the right place.
+		 */
+		os_pages_unmap(ret, size);
+		ret = NULL;
+	}
+#endif
+	assert(ret == NULL || (addr == NULL && ret != addr) || (addr != NULL &&
+	    ret == addr));
+	return ret;
+}
+
+static void *
+os_pages_trim(void *addr, size_t alloc_size, size_t leadsize, size_t size,
+    bool *commit) {
+	void *ret = (void *)((uintptr_t)addr + leadsize);
+
+	assert(alloc_size >= leadsize + size);
+#ifdef _WIN32
+	os_pages_unmap(addr, alloc_size);
+	void *new_addr = os_pages_map(ret, size, PAGE, commit);
+	if (new_addr == ret) {
+		return ret;
+	}
+	if (new_addr != NULL) {
+		os_pages_unmap(new_addr, size);
+	}
+	return NULL;
+#else
+	size_t trailsize = alloc_size - leadsize - size;
+
+	if (leadsize != 0) {
+		os_pages_unmap(addr, leadsize);
+	}
+	if (trailsize != 0) {
+		os_pages_unmap((void *)((uintptr_t)ret + size), trailsize);
+	}
+	return ret;
+#endif
+}
+
+static void
+os_pages_unmap(void *addr, size_t size) {
+	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr);
+	assert(ALIGNMENT_CEILING(size, os_page) == size);
+
+#ifdef _WIN32
+	if (VirtualFree(addr, 0, MEM_RELEASE) == 0)
+#else
+	if (munmap(addr, size) == -1)
+#endif
+	{
+		char buf[BUFERROR_BUF];
+
+		buferror(get_errno(), buf, sizeof(buf));
+		malloc_printf("<jemalloc>: Error in "
+#ifdef _WIN32
+		    "VirtualFree"
+#else
+		    "munmap"
+#endif
+		    "(): %s\n", buf);
+		if (opt_abort) {
+			abort();
+		}
+	}
+}
+
+static void *
+pages_map_slow(size_t size, size_t alignment, bool *commit) {
+	size_t alloc_size = size + alignment - os_page;
+	/* Beware size_t wrap-around. */
+	if (alloc_size < size) {
+		return NULL;
+	}
+
+	void *ret;
+	do {
+		void *pages = os_pages_map(NULL, alloc_size, alignment, commit);
+		if (pages == NULL) {
+			return NULL;
+		}
+		size_t leadsize = ALIGNMENT_CEILING((uintptr_t)pages, alignment)
+		    - (uintptr_t)pages;
+		ret = os_pages_trim(pages, alloc_size, leadsize, size, commit);
+	} while (ret == NULL);
+
+	assert(ret != NULL);
+	assert(PAGE_ADDR2BASE(ret) == ret);
+	return ret;
+}
+
+void *
+pages_map(void *addr, size_t size, size_t alignment, bool *commit) {
+	assert(alignment >= PAGE);
+	assert(ALIGNMENT_ADDR2BASE(addr, alignment) == addr);
+
+#if defined(__FreeBSD__) && defined(MAP_EXCL)
+	/*
+	 * FreeBSD has mechanisms both to mmap at specific address without
+	 * touching existing mappings, and to mmap with specific alignment.
+	 */
+	{
+		if (os_overcommits) {
+			*commit = true;
+		}
+
+		int prot = *commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT;
+		int flags = mmap_flags;
+
+		if (addr != NULL) {
+			flags |= MAP_FIXED | MAP_EXCL;
+		} else {
+			unsigned alignment_bits = ffs_zu(alignment);
+			assert(alignment_bits > 1);
+			flags |= MAP_ALIGNED(alignment_bits - 1);
+		}
+
+		void *ret = mmap(addr, size, prot, flags, -1, 0);
+		if (ret == MAP_FAILED) {
+			ret = NULL;
+		}
+
+		return ret;
+	}
+#endif
+	/*
+	 * Ideally, there would be a way to specify alignment to mmap() (like
+	 * NetBSD has), but in the absence of such a feature, we have to work
+	 * hard to efficiently create aligned mappings.  The reliable, but
+	 * slow method is to create a mapping that is over-sized, then trim the
+	 * excess.  However, that always results in one or two calls to
+	 * os_pages_unmap(), and it can leave holes in the process's virtual
+	 * memory map if memory grows downward.
+	 *
+	 * Optimistically try mapping precisely the right amount before falling
+	 * back to the slow method, with the expectation that the optimistic
+	 * approach works most of the time.
+	 */
+
+	void *ret = os_pages_map(addr, size, os_page, commit);
+	if (ret == NULL || ret == addr) {
+		return ret;
+	}
+	assert(addr == NULL);
+	if (ALIGNMENT_ADDR2OFFSET(ret, alignment) != 0) {
+		os_pages_unmap(ret, size);
+		return pages_map_slow(size, alignment, commit);
+	}
+
+	assert(PAGE_ADDR2BASE(ret) == ret);
+	return ret;
+}
+
+void
+pages_unmap(void *addr, size_t size) {
+	assert(PAGE_ADDR2BASE(addr) == addr);
+	assert(PAGE_CEILING(size) == size);
+
+	os_pages_unmap(addr, size);
+}
+
+static bool
+pages_commit_impl(void *addr, size_t size, bool commit) {
+	assert(PAGE_ADDR2BASE(addr) == addr);
+	assert(PAGE_CEILING(size) == size);
+
+	if (os_overcommits) {
+		return true;
+	}
+
+#ifdef _WIN32
+	return (commit ? (addr != VirtualAlloc(addr, size, MEM_COMMIT,
+	    PAGE_READWRITE)) : (!VirtualFree(addr, size, MEM_DECOMMIT)));
+#else
+	{
+		int prot = commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT;
+		void *result = mmap(addr, size, prot, mmap_flags | MAP_FIXED,
+		    -1, 0);
+		if (result == MAP_FAILED) {
+			return true;
+		}
+		if (result != addr) {
+			/*
+			 * We succeeded in mapping memory, but not in the right
+			 * place.
+			 */
+			os_pages_unmap(result, size);
+			return true;
+		}
+		return false;
+	}
+#endif
+}
+
+bool
+pages_commit(void *addr, size_t size) {
+	return pages_commit_impl(addr, size, true);
+}
+
+bool
+pages_decommit(void *addr, size_t size) {
+	return pages_commit_impl(addr, size, false);
+}
+
+bool
+pages_purge_lazy(void *addr, size_t size) {
+	assert(ALIGNMENT_ADDR2BASE(addr, os_page) == addr);
+	assert(PAGE_CEILING(size) == size);
+
+	if (!pages_can_purge_lazy) {
+		return true;
+	}
+	if (!pages_can_purge_lazy_runtime) {
+		/*
+		 * Built with lazy purge enabled, but detected it was not
+		 * supported on the current system.
+		 */
+		return true;
+	}
+
+#ifdef _WIN32
+	VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE);
+	return false;
+#elif defined(JEMALLOC_PURGE_MADVISE_FREE)
+	return (madvise(addr, size,
+#  ifdef MADV_FREE
+	    MADV_FREE
+#  else
+	    JEMALLOC_MADV_FREE
+#  endif
+	    ) != 0);
+#elif defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \
+    !defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS)
+	return (madvise(addr, size, MADV_DONTNEED) != 0);
+#else
+	not_reached();
+#endif
+}
+
+bool
+pages_purge_forced(void *addr, size_t size) {
+	assert(PAGE_ADDR2BASE(addr) == addr);
+	assert(PAGE_CEILING(size) == size);
+
+	if (!pages_can_purge_forced) {
+		return true;
+	}
+
+#if defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \
+    defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS)
+	return (madvise(addr, size, MADV_DONTNEED) != 0);
+#elif defined(JEMALLOC_MAPS_COALESCE)
+	/* Try to overlay a new demand-zeroed mapping. */
+	return pages_commit(addr, size);
+#else
+	not_reached();
+#endif
+}
+
+static bool
+pages_huge_impl(void *addr, size_t size, bool aligned) {
+	if (aligned) {
+		assert(HUGEPAGE_ADDR2BASE(addr) == addr);
+		assert(HUGEPAGE_CEILING(size) == size);
+	}
+#ifdef JEMALLOC_HAVE_MADVISE_HUGE
+	return (madvise(addr, size, MADV_HUGEPAGE) != 0);
+#else
+	return true;
+#endif
+}
+
+bool
+pages_huge(void *addr, size_t size) {
+	return pages_huge_impl(addr, size, true);
+}
+
+static bool
+pages_huge_unaligned(void *addr, size_t size) {
+	return pages_huge_impl(addr, size, false);
+}
+
+static bool
+pages_nohuge_impl(void *addr, size_t size, bool aligned) {
+	if (aligned) {
+		assert(HUGEPAGE_ADDR2BASE(addr) == addr);
+		assert(HUGEPAGE_CEILING(size) == size);
+	}
+
+#ifdef JEMALLOC_HAVE_MADVISE_HUGE
+	return (madvise(addr, size, MADV_NOHUGEPAGE) != 0);
+#else
+	return false;
+#endif
+}
+
+bool
+pages_nohuge(void *addr, size_t size) {
+	return pages_nohuge_impl(addr, size, true);
+}
+
+static bool
+pages_nohuge_unaligned(void *addr, size_t size) {
+	return pages_nohuge_impl(addr, size, false);
+}
+
+bool
+pages_dontdump(void *addr, size_t size) {
+	assert(PAGE_ADDR2BASE(addr) == addr);
+	assert(PAGE_CEILING(size) == size);
+#ifdef JEMALLOC_MADVISE_DONTDUMP
+	return madvise(addr, size, MADV_DONTDUMP) != 0;
+#else
+	return false;
+#endif
+}
+
+bool
+pages_dodump(void *addr, size_t size) {
+	assert(PAGE_ADDR2BASE(addr) == addr);
+	assert(PAGE_CEILING(size) == size);
+#ifdef JEMALLOC_MADVISE_DONTDUMP
+	return madvise(addr, size, MADV_DODUMP) != 0;
+#else
+	return false;
+#endif
+}
+
+
+static size_t
+os_page_detect(void) {
+#ifdef _WIN32
+	SYSTEM_INFO si;
+	GetSystemInfo(&si);
+	return si.dwPageSize;
+#elif defined(__FreeBSD__)
+	/*
+	 * This returns the value obtained from
+	 * the auxv vector, avoiding a syscall.
+	 */
+	return getpagesize();
+#else
+	long result = sysconf(_SC_PAGESIZE);
+	if (result == -1) {
+		return LG_PAGE;
+	}
+	return (size_t)result;
+#endif
+}
+
+#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT
+static bool
+os_overcommits_sysctl(void) {
+	int vm_overcommit;
+	size_t sz;
+
+	sz = sizeof(vm_overcommit);
+#if defined(__FreeBSD__) && defined(VM_OVERCOMMIT)
+	int mib[2];
+
+	mib[0] = CTL_VM;
+	mib[1] = VM_OVERCOMMIT;
+	if (sysctl(mib, 2, &vm_overcommit, &sz, NULL, 0) != 0) {
+		return false; /* Error. */
+	}
+#else
+	if (sysctlbyname("vm.overcommit", &vm_overcommit, &sz, NULL, 0) != 0) {
+		return false; /* Error. */
+	}
+#endif
+
+	return ((vm_overcommit & 0x3) == 0);
+}
+#endif
+
+#ifdef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY
+/*
+ * Use syscall(2) rather than {open,read,close}(2) when possible to avoid
+ * reentry during bootstrapping if another library has interposed system call
+ * wrappers.
+ */
+static bool
+os_overcommits_proc(void) {
+	int fd;
+	char buf[1];
+
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open)
+	#if defined(O_CLOEXEC)
+		fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY |
+			O_CLOEXEC);
+	#else
+		fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY);
+		if (fd != -1) {
+			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+		}
+	#endif
+#elif defined(JEMALLOC_USE_SYSCALL) && defined(SYS_openat)
+	#if defined(O_CLOEXEC)
+		fd = (int)syscall(SYS_openat,
+			AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC);
+	#else
+		fd = (int)syscall(SYS_openat,
+			AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY);
+		if (fd != -1) {
+			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+		}
+	#endif
+#else
+	#if defined(O_CLOEXEC)
+		fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC);
+	#else
+		fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY);
+		if (fd != -1) {
+			fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+		}
+	#endif
+#endif
+
+	if (fd == -1) {
+		return false; /* Error. */
+	}
+
+	ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf));
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close)
+	syscall(SYS_close, fd);
+#else
+	close(fd);
+#endif
+
+	if (nread < 1) {
+		return false; /* Error. */
+	}
+	/*
+	 * /proc/sys/vm/overcommit_memory meanings:
+	 * 0: Heuristic overcommit.
+	 * 1: Always overcommit.
+	 * 2: Never overcommit.
+	 */
+	return (buf[0] == '0' || buf[0] == '1');
+}
+#endif
+
+void
+pages_set_thp_state (void *ptr, size_t size) {
+	if (opt_thp == thp_mode_default || opt_thp == init_system_thp_mode) {
+		return;
+	}
+	assert(opt_thp != thp_mode_not_supported &&
+	    init_system_thp_mode != thp_mode_not_supported);
+
+	if (opt_thp == thp_mode_always
+	    && init_system_thp_mode != thp_mode_never) {
+		assert(init_system_thp_mode == thp_mode_default);
+		pages_huge_unaligned(ptr, size);
+	} else if (opt_thp == thp_mode_never) {
+		assert(init_system_thp_mode == thp_mode_default ||
+		    init_system_thp_mode == thp_mode_always);
+		pages_nohuge_unaligned(ptr, size);
+	}
+}
+
+static void
+init_thp_state(void) {
+	if (!have_madvise_huge) {
+		if (metadata_thp_enabled() && opt_abort) {
+			malloc_write("<jemalloc>: no MADV_HUGEPAGE support\n");
+			abort();
+		}
+		goto label_error;
+	}
+
+	static const char sys_state_madvise[] = "always [madvise] never\n";
+	static const char sys_state_always[] = "[always] madvise never\n";
+	static const char sys_state_never[] = "always madvise [never]\n";
+	char buf[sizeof(sys_state_madvise)];
+
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open)
+	int fd = (int)syscall(SYS_open,
+	    "/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
+#else
+	int fd = open("/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
+#endif
+	if (fd == -1) {
+		goto label_error;
+	}
+
+	ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf));
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close)
+	syscall(SYS_close, fd);
+#else
+	close(fd);
+#endif
+
+        if (nread < 0) {
 		goto label_error; 
-	} 
- 
-	static const char sys_state_madvise[] = "always [madvise] never\n"; 
-	static const char sys_state_always[] = "[always] madvise never\n"; 
-	static const char sys_state_never[] = "always madvise [never]\n"; 
-	char buf[sizeof(sys_state_madvise)]; 
- 
-#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open) 
-	int fd = (int)syscall(SYS_open, 
-	    "/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY); 
-#else 
-	int fd = open("/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY); 
-#endif 
-	if (fd == -1) { 
-		goto label_error; 
-	} 
- 
-	ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf)); 
-#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close) 
-	syscall(SYS_close, fd); 
-#else 
-	close(fd); 
-#endif 
- 
-        if (nread < 0) { 
-		goto label_error;  
-        } 
- 
-	if (strncmp(buf, sys_state_madvise, (size_t)nread) == 0) { 
-		init_system_thp_mode = thp_mode_default; 
-	} else if (strncmp(buf, sys_state_always, (size_t)nread) == 0) { 
-		init_system_thp_mode = thp_mode_always; 
-	} else if (strncmp(buf, sys_state_never, (size_t)nread) == 0) { 
-		init_system_thp_mode = thp_mode_never; 
-	} else { 
-		goto label_error; 
-	} 
-	return; 
-label_error: 
-	opt_thp = init_system_thp_mode = thp_mode_not_supported; 
-} 
- 
-bool 
-pages_boot(void) { 
-	os_page = os_page_detect(); 
-	if (os_page > PAGE) { 
-		malloc_write("<jemalloc>: Unsupported system page size\n"); 
-		if (opt_abort) { 
-			abort(); 
-		} 
-		return true; 
-	} 
- 
-#ifndef _WIN32 
-	mmap_flags = MAP_PRIVATE | MAP_ANON; 
-#endif 
- 
-#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT 
-	os_overcommits = os_overcommits_sysctl(); 
-#elif defined(JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY) 
-	os_overcommits = os_overcommits_proc(); 
-#  ifdef MAP_NORESERVE 
-	if (os_overcommits) { 
-		mmap_flags |= MAP_NORESERVE; 
-	} 
-#  endif 
-#else 
-	os_overcommits = false; 
-#endif 
- 
-	init_thp_state(); 
- 
-#ifdef __FreeBSD__ 
-	/* 
-	 * FreeBSD doesn't need the check; madvise(2) is known to work. 
-	 */ 
-#else 
-	/* Detect lazy purge runtime support. */ 
-	if (pages_can_purge_lazy) { 
-		bool committed = false; 
-		void *madv_free_page = os_pages_map(NULL, PAGE, PAGE, &committed); 
-		if (madv_free_page == NULL) { 
-			return true; 
-		} 
-		assert(pages_can_purge_lazy_runtime); 
-		if (pages_purge_lazy(madv_free_page, PAGE)) { 
-			pages_can_purge_lazy_runtime = false; 
-		} 
-		os_pages_unmap(madv_free_page, PAGE); 
-	} 
-#endif 
- 
-	return false; 
-} 
+        }
+
+	if (strncmp(buf, sys_state_madvise, (size_t)nread) == 0) {
+		init_system_thp_mode = thp_mode_default;
+	} else if (strncmp(buf, sys_state_always, (size_t)nread) == 0) {
+		init_system_thp_mode = thp_mode_always;
+	} else if (strncmp(buf, sys_state_never, (size_t)nread) == 0) {
+		init_system_thp_mode = thp_mode_never;
+	} else {
+		goto label_error;
+	}
+	return;
+label_error:
+	opt_thp = init_system_thp_mode = thp_mode_not_supported;
+}
+
+bool
+pages_boot(void) {
+	os_page = os_page_detect();
+	if (os_page > PAGE) {
+		malloc_write("<jemalloc>: Unsupported system page size\n");
+		if (opt_abort) {
+			abort();
+		}
+		return true;
+	}
+
+#ifndef _WIN32
+	mmap_flags = MAP_PRIVATE | MAP_ANON;
+#endif
+
+#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT
+	os_overcommits = os_overcommits_sysctl();
+#elif defined(JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY)
+	os_overcommits = os_overcommits_proc();
+#  ifdef MAP_NORESERVE
+	if (os_overcommits) {
+		mmap_flags |= MAP_NORESERVE;
+	}
+#  endif
+#else
+	os_overcommits = false;
+#endif
+
+	init_thp_state();
+
+#ifdef __FreeBSD__
+	/*
+	 * FreeBSD doesn't need the check; madvise(2) is known to work.
+	 */
+#else
+	/* Detect lazy purge runtime support. */
+	if (pages_can_purge_lazy) {
+		bool committed = false;
+		void *madv_free_page = os_pages_map(NULL, PAGE, PAGE, &committed);
+		if (madv_free_page == NULL) {
+			return true;
+		}
+		assert(pages_can_purge_lazy_runtime);
+		if (pages_purge_lazy(madv_free_page, PAGE)) {
+			pages_can_purge_lazy_runtime = false;
+		}
+		os_pages_unmap(madv_free_page, PAGE);
+	}
+#endif
+
+	return false;
+}