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Bug 965870 - Try to use __builtin_ffsl if ffsl is unavailable. r=mshal

Browse Source 
Cherry-picked from 9c3a10fdf6
This commit is contained in:
Mike Hommey 2014-06-06 08:15:58 +09:00
parent 6db5262eba
commit 90ff451c5a
11 changed files with 475 additions and 17 deletions
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354
memory/jemalloc/0004-Try-to-use-__builtin_ffsl-if-ffsl-is-unavailable.patch Normal file
View File

@ -0,0 +1,354 @@
diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -6940,18 +6940,67 @@ else
je_cv_function_ffsl=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $je_cv_function_ffsl" >&5
$as_echo "$je_cv_function_ffsl" >&6; }
-if test "x${je_cv_function_ffsl}" != "xyes" ; then
- as_fn_error $? "Cannot build without ffsl(3)" "$LINENO" 5
+if test "x${je_cv_function_ffsl}" == "xyes" ; then
+ $as_echo "#define JEMALLOC_INTERNAL_FFSL ffsl" >>confdefs.h
+
+ $as_echo "#define JEMALLOC_INTERNAL_FFS ffs" >>confdefs.h
+
+else
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program using __builtin_ffsl is compilable" >&5
+$as_echo_n "checking whether a program using __builtin_ffsl is compilable... " >&6; }
+if ${je_cv_gcc_builtin_ffsl+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ #include <stdio.h>
+ #include <strings.h>
+ #include <string.h>
+
+int
+main ()
+{
+
+ {
+ int rv = __builtin_ffsl(0x08);
+ printf("%d\n", rv);
+ }
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ je_cv_gcc_builtin_ffsl=yes
+else
+ je_cv_gcc_builtin_ffsl=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $je_cv_gcc_builtin_ffsl" >&5
+$as_echo "$je_cv_gcc_builtin_ffsl" >&6; }
+
+ if test "x${je_cv_gcc_builtin_ffsl}" == "xyes" ; then
+ $as_echo "#define JEMALLOC_INTERNAL_FFSL __builtin_ffsl" >>confdefs.h
+
+ $as_echo "#define JEMALLOC_INTERNAL_FFS __builtin_ffs" >>confdefs.h
+
+ else
+ as_fn_error $? "Cannot build without ffsl(3) or __builtin_ffsl()" "$LINENO" 5
+ fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether atomic(9) is compilable" >&5
$as_echo_n "checking whether atomic(9) is compilable... " >&6; }
if ${je_cv_atomic9+:} false; then :
$as_echo_n "(cached) " >&6
diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -1160,31 +1160,51 @@ fi
AC_SUBST([enable_tls])
if test "x${enable_tls}" = "x1" ; then
AC_DEFINE_UNQUOTED([JEMALLOC_TLS], [ ])
elif test "x${force_tls}" = "x1" ; then
AC_MSG_ERROR([Failed to configure TLS, which is mandatory for correct function])
fi
dnl ============================================================================
-dnl Check for ffsl(3), and fail if not found. This function exists on all
-dnl platforms that jemalloc currently has a chance of functioning on without
-dnl modification.
+dnl Check for ffsl(3), then __builtin_ffsl(), and fail if neither are found.
+dnl One of those two functions should (theoretically) exist on all platforms
+dnl that jemalloc currently has a chance of functioning on without modification.
+dnl We additionally assume ffs() or __builtin_ffs() are defined if
+dnl ffsl() or __builtin_ffsl() are defined, respectively.
JE_COMPILABLE([a program using ffsl], [
#include <stdio.h>
#include <strings.h>
#include <string.h>
], [
{
int rv = ffsl(0x08);
printf("%d\n", rv);
}
], [je_cv_function_ffsl])
-if test "x${je_cv_function_ffsl}" != "xyes" ; then
- AC_MSG_ERROR([Cannot build without ffsl(3)])
+if test "x${je_cv_function_ffsl}" == "xyes" ; then
+ AC_DEFINE([JEMALLOC_INTERNAL_FFSL], [ffsl])
+ AC_DEFINE([JEMALLOC_INTERNAL_FFS], [ffs])
+else
+ JE_COMPILABLE([a program using __builtin_ffsl], [
+ #include <stdio.h>
+ #include <strings.h>
+ #include <string.h>
+ ], [
+ {
+ int rv = __builtin_ffsl(0x08);
+ printf("%d\n", rv);
+ }
+ ], [je_cv_gcc_builtin_ffsl])
+ if test "x${je_cv_gcc_builtin_ffsl}" == "xyes" ; then
+ AC_DEFINE([JEMALLOC_INTERNAL_FFSL], [__builtin_ffsl])
+ AC_DEFINE([JEMALLOC_INTERNAL_FFS], [__builtin_ffs])
+ else
+ AC_MSG_ERROR([Cannot build without ffsl(3) or __builtin_ffsl()])
+ fi
fi
dnl ============================================================================
dnl Check for atomic(9) operations as provided on FreeBSD.
JE_COMPILABLE([atomic(9)], [
#include <sys/types.h>
#include <machine/atomic.h>
diff --git a/include/jemalloc/internal/arena.h b/include/jemalloc/internal/arena.h
--- a/include/jemalloc/internal/arena.h
+++ b/include/jemalloc/internal/arena.h
@@ -810,17 +810,17 @@ arena_run_regind(arena_run_t *run, arena
* Avoid doing division with a variable divisor if possible. Using
* actual division here can reduce allocator throughput by over 20%!
*/
diff = (unsigned)((uintptr_t)ptr - (uintptr_t)run -
bin_info->reg0_offset);
/* Rescale (factor powers of 2 out of the numerator and denominator). */
interval = bin_info->reg_interval;
- shift = ffs(interval) - 1;
+ shift = jemalloc_ffs(interval) - 1;
diff >>= shift;
interval >>= shift;
if (interval == 1) {
/* The divisor was a power of 2. */
regind = diff;
} else {
/*
diff --git a/include/jemalloc/internal/bitmap.h b/include/jemalloc/internal/bitmap.h
--- a/include/jemalloc/internal/bitmap.h
+++ b/include/jemalloc/internal/bitmap.h
@@ -125,21 +125,21 @@ bitmap_sfu(bitmap_t *bitmap, const bitma
size_t bit;
bitmap_t g;
unsigned i;
assert(bitmap_full(bitmap, binfo) == false);
i = binfo->nlevels - 1;
g = bitmap[binfo->levels[i].group_offset];
- bit = ffsl(g) - 1;
+ bit = jemalloc_ffsl(g) - 1;
while (i > 0) {
i--;
g = bitmap[binfo->levels[i].group_offset + bit];
- bit = (bit << LG_BITMAP_GROUP_NBITS) + (ffsl(g) - 1);
+ bit = (bit << LG_BITMAP_GROUP_NBITS) + (jemalloc_ffsl(g) - 1);
}
bitmap_set(bitmap, binfo, bit);
return (bit);
}
JEMALLOC_INLINE void
bitmap_unset(bitmap_t *bitmap, const bitmap_info_t *binfo, size_t bit)
diff --git a/include/jemalloc/internal/jemalloc_internal.h.in b/include/jemalloc/internal/jemalloc_internal.h.in
--- a/include/jemalloc/internal/jemalloc_internal.h.in
+++ b/include/jemalloc/internal/jemalloc_internal.h.in
@@ -9,21 +9,23 @@
# define EPERM ERROR_WRITE_FAULT
# define EFAULT ERROR_INVALID_ADDRESS
# define ENOMEM ERROR_NOT_ENOUGH_MEMORY
# undef ERANGE
# define ERANGE ERROR_INVALID_DATA
#else
# include <sys/param.h>
# include <sys/mman.h>
-# include <sys/syscall.h>
-# if !defined(SYS_write) && defined(__NR_write)
-# define SYS_write __NR_write
+# if !defined(__pnacl__) && !defined(__native_client__)
+# include <sys/syscall.h>
+# if !defined(SYS_write) && defined(__NR_write)
+# define SYS_write __NR_write
+# endif
+# include <sys/uio.h>
# endif
-# include <sys/uio.h>
# include <pthread.h>
# include <errno.h>
#endif
#include <sys/types.h>
#include <limits.h>
#ifndef SIZE_T_MAX
# define SIZE_T_MAX SIZE_MAX
@@ -275,16 +277,19 @@ static const bool config_ivsalloc =
# define LG_QUANTUM 4
# endif
# ifdef __SH4__
# define LG_QUANTUM 4
# endif
# ifdef __tile__
# define LG_QUANTUM 4
# endif
+# ifdef __le32__
+# define LG_QUANTUM 4
+# endif
# ifndef LG_QUANTUM
# error "No LG_QUANTUM definition for architecture; specify via CPPFLAGS"
# endif
#endif
#define QUANTUM ((size_t)(1U << LG_QUANTUM))
#define QUANTUM_MASK (QUANTUM - 1)
diff --git a/include/jemalloc/internal/jemalloc_internal_defs.h.in b/include/jemalloc/internal/jemalloc_internal_defs.h.in
--- a/include/jemalloc/internal/jemalloc_internal_defs.h.in
+++ b/include/jemalloc/internal/jemalloc_internal_defs.h.in
@@ -153,16 +153,23 @@
* memory map holes, much like munmap(2) does.
*/
#undef JEMALLOC_MREMAP
/* TLS is used to map arenas and magazine caches to threads. */
#undef JEMALLOC_TLS
/*
+ * ffs()/ffsl() functions to use for bitmapping. Don't use these directly;
+ * instead, use jemalloc_ffs() or jemalloc_ffsl() from util.h.
+ */
+#undef JEMALLOC_INTERNAL_FFSL
+#undef JEMALLOC_INTERNAL_FFS
+
+/*
* JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside
* within jemalloc-owned chunks before dereferencing them.
*/
#undef JEMALLOC_IVSALLOC
/*
* Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings.
*/
diff --git a/include/jemalloc/internal/util.h b/include/jemalloc/internal/util.h
--- a/include/jemalloc/internal/util.h
+++ b/include/jemalloc/internal/util.h
@@ -104,22 +104,44 @@ void malloc_cprintf(void (*write)(void *
void malloc_printf(const char *format, ...)
JEMALLOC_ATTR(format(printf, 1, 2));
#endif /* JEMALLOC_H_EXTERNS */
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
#ifndef JEMALLOC_ENABLE_INLINE
+int jemalloc_ffsl(long bitmap);
+int jemalloc_ffs(int bitmap);
size_t pow2_ceil(size_t x);
void set_errno(int errnum);
int get_errno(void);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_UTIL_C_))
+
+/* Sanity check: */
+#if !defined(JEMALLOC_INTERNAL_FFSL) || !defined(JEMALLOC_INTERNAL_FFS)
+# error Both JEMALLOC_INTERNAL_FFSL && JEMALLOC_INTERNAL_FFS should have been defined by configure
+#endif
+
+JEMALLOC_ALWAYS_INLINE int
+jemalloc_ffsl(long bitmap)
+{
+
+ return (JEMALLOC_INTERNAL_FFSL(bitmap));
+}
+
+JEMALLOC_ALWAYS_INLINE int
+jemalloc_ffs(int bitmap)
+{
+
+ return (JEMALLOC_INTERNAL_FFS(bitmap));
+}
+
/* Compute the smallest power of 2 that is >= x. */
JEMALLOC_INLINE size_t
pow2_ceil(size_t x)
{
x--;
x |= x >> 1;
x |= x >> 2;
diff --git a/src/arena.c b/src/arena.c
--- a/src/arena.c
+++ b/src/arena.c
@@ -2378,17 +2378,17 @@ bin_info_run_size_calc(arena_bin_info_t
/*
* Determine redzone size based on minimum alignment and minimum
* redzone size. Add padding to the end of the run if it is needed to
* align the regions. The padding allows each redzone to be half the
* minimum alignment; without the padding, each redzone would have to
* be twice as large in order to maintain alignment.
*/
if (config_fill && opt_redzone) {
- size_t align_min = ZU(1) << (ffs(bin_info->reg_size) - 1);
+ size_t align_min = ZU(1) << (jemalloc_ffs(bin_info->reg_size) - 1);
if (align_min <= REDZONE_MINSIZE) {
bin_info->redzone_size = REDZONE_MINSIZE;
pad_size = 0;
} else {
bin_info->redzone_size = align_min >> 1;
pad_size = bin_info->redzone_size;
}
} else {
diff --git a/src/rtree.c b/src/rtree.c
--- a/src/rtree.c
+++ b/src/rtree.c
@@ -4,18 +4,18 @@
rtree_t *
rtree_new(unsigned bits, rtree_alloc_t *alloc, rtree_dalloc_t *dalloc)
{
rtree_t *ret;
unsigned bits_per_level, bits_in_leaf, height, i;
assert(bits > 0 && bits <= (sizeof(uintptr_t) << 3));
- bits_per_level = ffs(pow2_ceil((RTREE_NODESIZE / sizeof(void *)))) - 1;
- bits_in_leaf = ffs(pow2_ceil((RTREE_NODESIZE / sizeof(uint8_t)))) - 1;
+ bits_per_level = jemalloc_ffs(pow2_ceil((RTREE_NODESIZE / sizeof(void *)))) - 1;
+ bits_in_leaf = jemalloc_ffs(pow2_ceil((RTREE_NODESIZE / sizeof(uint8_t)))) - 1;
if (bits > bits_in_leaf) {
height = 1 + (bits - bits_in_leaf) / bits_per_level;
if ((height-1) * bits_per_level + bits_in_leaf != bits)
height++;
} else {
height = 1;
}
assert((height-1) * bits_per_level + bits_in_leaf >= bits);

53
memory/jemalloc/src/configure vendored
View File

@ -6945,8 +6945,57 @@ fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $je_cv_function_ffsl" >&5
$as_echo "$je_cv_function_ffsl" >&6; }
if test "x${je_cv_function_ffsl}" != "xyes" ; then
as_fn_error $? "Cannot build without ffsl(3)" "$LINENO" 5
if test "x${je_cv_function_ffsl}" == "xyes" ; then
$as_echo "#define JEMALLOC_INTERNAL_FFSL ffsl" >>confdefs.h
$as_echo "#define JEMALLOC_INTERNAL_FFS ffs" >>confdefs.h
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program using __builtin_ffsl is compilable" >&5
$as_echo_n "checking whether a program using __builtin_ffsl is compilable... " >&6; }
if ${je_cv_gcc_builtin_ffsl+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <stdio.h>
#include <strings.h>
#include <string.h>
int
main ()
{
{
int rv = __builtin_ffsl(0x08);
printf("%d\n", rv);
}
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
je_cv_gcc_builtin_ffsl=yes
else
je_cv_gcc_builtin_ffsl=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $je_cv_gcc_builtin_ffsl" >&5
$as_echo "$je_cv_gcc_builtin_ffsl" >&6; }
if test "x${je_cv_gcc_builtin_ffsl}" == "xyes" ; then
$as_echo "#define JEMALLOC_INTERNAL_FFSL __builtin_ffsl" >>confdefs.h
$as_echo "#define JEMALLOC_INTERNAL_FFS __builtin_ffs" >>confdefs.h
else
as_fn_error $? "Cannot build without ffsl(3) or __builtin_ffsl()" "$LINENO" 5
fi
fi

30
memory/jemalloc/src/configure.ac
View File

@ -1165,9 +1165,11 @@ elif test "x${force_tls}" = "x1" ; then
fi
dnl ============================================================================
dnl Check for ffsl(3), and fail if not found. This function exists on all
dnl platforms that jemalloc currently has a chance of functioning on without
dnl modification.
dnl Check for ffsl(3), then __builtin_ffsl(), and fail if neither are found.
dnl One of those two functions should (theoretically) exist on all platforms
dnl that jemalloc currently has a chance of functioning on without modification.
dnl We additionally assume ffs() or __builtin_ffs() are defined if
dnl ffsl() or __builtin_ffsl() are defined, respectively.
JE_COMPILABLE([a program using ffsl], [
#include <stdio.h>
#include <strings.h>
@ -1178,8 +1180,26 @@ JE_COMPILABLE([a program using ffsl], [
printf("%d\n", rv);
}
], [je_cv_function_ffsl])
if test "x${je_cv_function_ffsl}" != "xyes" ; then
AC_MSG_ERROR([Cannot build without ffsl(3)])
if test "x${je_cv_function_ffsl}" == "xyes" ; then
AC_DEFINE([JEMALLOC_INTERNAL_FFSL], [ffsl])
AC_DEFINE([JEMALLOC_INTERNAL_FFS], [ffs])
else
JE_COMPILABLE([a program using __builtin_ffsl], [
#include <stdio.h>
#include <strings.h>
#include <string.h>
], [
{
int rv = __builtin_ffsl(0x08);
printf("%d\n", rv);
}
], [je_cv_gcc_builtin_ffsl])
if test "x${je_cv_gcc_builtin_ffsl}" == "xyes" ; then
AC_DEFINE([JEMALLOC_INTERNAL_FFSL], [__builtin_ffsl])
AC_DEFINE([JEMALLOC_INTERNAL_FFS], [__builtin_ffs])
else
AC_MSG_ERROR([Cannot build without ffsl(3) or __builtin_ffsl()])
fi
fi
dnl ============================================================================

2
memory/jemalloc/src/include/jemalloc/internal/arena.h
View File

@ -815,7 +815,7 @@ arena_run_regind(arena_run_t *run, arena_bin_info_t *bin_info, const void *ptr)
/* Rescale (factor powers of 2 out of the numerator and denominator). */
interval = bin_info->reg_interval;
shift = ffs(interval) - 1;
shift = jemalloc_ffs(interval) - 1;
diff >>= shift;
interval >>= shift;

4
memory/jemalloc/src/include/jemalloc/internal/bitmap.h
View File

@ -130,11 +130,11 @@ bitmap_sfu(bitmap_t *bitmap, const bitmap_info_t *binfo)
i = binfo->nlevels - 1;
g = bitmap[binfo->levels[i].group_offset];
bit = ffsl(g) - 1;
bit = jemalloc_ffsl(g) - 1;
while (i > 0) {
i--;
g = bitmap[binfo->levels[i].group_offset + bit];
bit = (bit << LG_BITMAP_GROUP_NBITS) + (ffsl(g) - 1);
bit = (bit << LG_BITMAP_GROUP_NBITS) + (jemalloc_ffsl(g) - 1);
}
bitmap_set(bitmap, binfo, bit);

13
memory/jemalloc/src/include/jemalloc/internal/jemalloc_internal.h.in
View File

@ -14,11 +14,13 @@
#else
# include <sys/param.h>
# include <sys/mman.h>
# include <sys/syscall.h>
# if !defined(SYS_write) && defined(__NR_write)
# define SYS_write __NR_write
# if !defined(__pnacl__) && !defined(__native_client__)
# include <sys/syscall.h>
# if !defined(SYS_write) && defined(__NR_write)
# define SYS_write __NR_write
# endif
# include <sys/uio.h>
# endif
# include <sys/uio.h>
# include <pthread.h>
# include <errno.h>
#endif
@ -280,6 +282,9 @@ static const bool config_ivsalloc =
# ifdef __tile__
# define LG_QUANTUM 4
# endif
# ifdef __le32__
# define LG_QUANTUM 4
# endif
# ifndef LG_QUANTUM
# error "No LG_QUANTUM definition for architecture; specify via CPPFLAGS"
# endif

7
memory/jemalloc/src/include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -157,6 +157,13 @@
/* TLS is used to map arenas and magazine caches to threads. */
#undef JEMALLOC_TLS
/*
* ffs()/ffsl() functions to use for bitmapping. Don't use these directly;
* instead, use jemalloc_ffs() or jemalloc_ffsl() from util.h.
*/
#undef JEMALLOC_INTERNAL_FFSL
#undef JEMALLOC_INTERNAL_FFS
/*
* JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside
* within jemalloc-owned chunks before dereferencing them.

22
memory/jemalloc/src/include/jemalloc/internal/util.h
View File

@ -109,12 +109,34 @@ void malloc_printf(const char *format, ...)
#ifdef JEMALLOC_H_INLINES
#ifndef JEMALLOC_ENABLE_INLINE
int jemalloc_ffsl(long bitmap);
int jemalloc_ffs(int bitmap);
size_t pow2_ceil(size_t x);
void set_errno(int errnum);
int get_errno(void);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_UTIL_C_))
/* Sanity check: */
#if !defined(JEMALLOC_INTERNAL_FFSL) || !defined(JEMALLOC_INTERNAL_FFS)
# error Both JEMALLOC_INTERNAL_FFSL && JEMALLOC_INTERNAL_FFS should have been defined by configure
#endif
JEMALLOC_ALWAYS_INLINE int
jemalloc_ffsl(long bitmap)
{
return (JEMALLOC_INTERNAL_FFSL(bitmap));
}
JEMALLOC_ALWAYS_INLINE int
jemalloc_ffs(int bitmap)
{
return (JEMALLOC_INTERNAL_FFS(bitmap));
}
/* Compute the smallest power of 2 that is >= x. */
JEMALLOC_INLINE size_t
pow2_ceil(size_t x)

2
memory/jemalloc/src/src/arena.c
View File

@ -2383,7 +2383,7 @@ bin_info_run_size_calc(arena_bin_info_t *bin_info, size_t min_run_size)
* be twice as large in order to maintain alignment.
*/
if (config_fill && opt_redzone) {
size_t align_min = ZU(1) << (ffs(bin_info->reg_size) - 1);
size_t align_min = ZU(1) << (jemalloc_ffs(bin_info->reg_size) - 1);
if (align_min <= REDZONE_MINSIZE) {
bin_info->redzone_size = REDZONE_MINSIZE;
pad_size = 0;

4
memory/jemalloc/src/src/rtree.c
View File

@ -9,8 +9,8 @@ rtree_new(unsigned bits, rtree_alloc_t *alloc, rtree_dalloc_t *dalloc)
assert(bits > 0 && bits <= (sizeof(uintptr_t) << 3));
bits_per_level = ffs(pow2_ceil((RTREE_NODESIZE / sizeof(void *)))) - 1;
bits_in_leaf = ffs(pow2_ceil((RTREE_NODESIZE / sizeof(uint8_t)))) - 1;
bits_per_level = jemalloc_ffs(pow2_ceil((RTREE_NODESIZE / sizeof(void *)))) - 1;
bits_in_leaf = jemalloc_ffs(pow2_ceil((RTREE_NODESIZE / sizeof(uint8_t)))) - 1;
if (bits > bits_in_leaf) {
height = 1 + (bits - bits_in_leaf) / bits_per_level;
if ((height-1) * bits_per_level + bits_in_leaf != bits)

1
memory/jemalloc/update.sh
View File

@ -17,6 +17,7 @@ rm -rf .git .gitignore autom4te.cache
patch -p1 < ../0001-Use-a-configure-test-to-detect-whether-to-use-a-cons.patch
patch -p1 < ../0002-Use-ULL-prefix-instead-of-LLU-for-unsigned-long-long.patch
patch -p1 < ../0003-Don-t-use-msvc_compat-s-C99-headers-with-MSVC-versio.patch
patch -p1 < ../0004-Try-to-use-__builtin_ffsl-if-ffsl-is-unavailable.patch
cd ..
hg addremove -q src