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Merge pull request #2630 from chaimleib/fix-bpo-27987-on-eol-pythons
bpo-27987 for v3.5.10 and v3.6.15: align by 16bytes on 64bit platforms
This commit is contained in:
commit
276ce32643
8 changed files with 378 additions and 0 deletions
|
@ -0,0 +1,43 @@
|
||||||
|
From 112cceb514e79b4c9805f9e5ea037a205be428da Mon Sep 17 00:00:00 2001
|
||||||
|
From: Inada Naoki <songofacandy@gmail.com>
|
||||||
|
Date: Tue, 14 May 2019 18:51:15 +0900
|
||||||
|
Subject: [PATCH 1/2] bpo-27987: pymalloc: align by 16bytes on 64bit platform
|
||||||
|
(GH-12850)
|
||||||
|
|
||||||
|
---
|
||||||
|
.../2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst | 3 +++
|
||||||
|
Objects/obmalloc.c | 6 ++++++
|
||||||
|
2 files changed, 9 insertions(+)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
|
||||||
|
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst b/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..b0f32a5c6c
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
@@ -0,0 +1,3 @@
|
||||||
|
+pymalloc returns memory blocks aligned by 16 bytes, instead of 8 bytes, on
|
||||||
|
+64-bit platforms to conform x86-64 ABI. Recent compilers assume this alignment
|
||||||
|
+more often. Patch by Inada Naoki.
|
||||||
|
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
|
||||||
|
index 9dd8421a33..da9029c4a6 100644
|
||||||
|
--- a/Objects/obmalloc.c
|
||||||
|
+++ b/Objects/obmalloc.c
|
||||||
|
@@ -540,8 +540,14 @@ static int running_on_valgrind = -1;
|
||||||
|
*
|
||||||
|
* You shouldn't change this unless you know what you are doing.
|
||||||
|
*/
|
||||||
|
+
|
||||||
|
+#if SIZEOF_VOID_P > 4
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||||||
|
+#define ALIGNMENT 16 /* must be 2^N */
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|
+#define ALIGNMENT_SHIFT 4
|
||||||
|
+#else
|
||||||
|
#define ALIGNMENT 8 /* must be 2^N */
|
||||||
|
#define ALIGNMENT_SHIFT 3
|
||||||
|
+#endif
|
||||||
|
|
||||||
|
/* Return the number of bytes in size class I, as a uint. */
|
||||||
|
#define INDEX2SIZE(I) (((uint)(I) + 1) << ALIGNMENT_SHIFT)
|
||||||
|
--
|
||||||
|
2.38.4
|
||||||
|
|
|
@ -0,0 +1,40 @@
|
||||||
|
From 618ef35426ecc57da1bee50f8dc5896f5fb178a9 Mon Sep 17 00:00:00 2001
|
||||||
|
From: Inada Naoki <songofacandy@gmail.com>
|
||||||
|
Date: Sat, 25 May 2019 21:13:33 +0900
|
||||||
|
Subject: [PATCH 2/2] bpo-27987: align PyGC_Head to alignof(long double)
|
||||||
|
(GH-13335)
|
||||||
|
|
||||||
|
---
|
||||||
|
Include/objimpl.h | 6 +++++-
|
||||||
|
.../2019-05-15-18-28-43.bpo-27987.FaxuLy.rst | 2 ++
|
||||||
|
2 files changed, 7 insertions(+), 1 deletion(-)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
|
||||||
|
diff --git a/Include/objimpl.h b/Include/objimpl.h
|
||||||
|
index 65b6d91c36..eaf57975c8 100644
|
||||||
|
--- a/Include/objimpl.h
|
||||||
|
+++ b/Include/objimpl.h
|
||||||
|
@@ -250,7 +250,11 @@ typedef union _gc_head {
|
||||||
|
union _gc_head *gc_prev;
|
||||||
|
Py_ssize_t gc_refs;
|
||||||
|
} gc;
|
||||||
|
- double dummy; /* force worst-case alignment */
|
||||||
|
+ long double dummy; /* force worst-case alignment */
|
||||||
|
+ // malloc returns memory block aligned for any built-in types and
|
||||||
|
+ // long double is the largest standard C type.
|
||||||
|
+ // On amd64 linux, long double requires 16 byte alignment.
|
||||||
|
+ // See bpo-27987 for more discussion.
|
||||||
|
} PyGC_Head;
|
||||||
|
|
||||||
|
extern PyGC_Head *_PyGC_generation0;
|
||||||
|
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst b/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..97ca37b262
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
@@ -0,0 +1,2 @@
|
||||||
|
+``PyGC_Head`` structure is aligned to ``long double``. This is needed to
|
||||||
|
+GC-ed objects are aligned properly. Patch by Inada Naoki.
|
||||||
|
--
|
||||||
|
2.38.4
|
||||||
|
|
|
@ -0,0 +1,86 @@
|
||||||
|
From 655f26bb742d6bd32c388e9fea14b64eb25fd4de Mon Sep 17 00:00:00 2001
|
||||||
|
From: Ned Deily <nad@python.org>
|
||||||
|
Date: Tue, 15 Mar 2022 03:18:39 -0400
|
||||||
|
Subject: [PATCH] bpo-45405: Prevent internal configure error when running
|
||||||
|
configure with recent versions of clang. (GH-28845) (GH-31890)
|
||||||
|
|
||||||
|
Change the configure logic to function properly on macOS when the compiler
|
||||||
|
outputs a platform triplet for option --print-multiarch.
|
||||||
|
The Apple Clang included with Xcode 13.3 now supports --print-multiarch
|
||||||
|
causing configure to fail without this change.
|
||||||
|
|
||||||
|
Co-authored-by: Ned Deily <nad@python.org>
|
||||||
|
(cherry picked from commit 9c4766772cda67648184f8ddba546a5fc0167f91)
|
||||||
|
|
||||||
|
Co-authored-by: David Bohman <debohman@gmail.com>
|
||||||
|
(cherry picked from commit 720bb456dc711b0776bae837d1f9a0b10c28ddf2)
|
||||||
|
---
|
||||||
|
.../next/Build/2021-10-11-16-27-38.bpo-45405.iSfdW5.rst | 2 ++
|
||||||
|
configure | 8 +++++---
|
||||||
|
configure.ac | 8 +++++---
|
||||||
|
3 files changed, 12 insertions(+), 6 deletions(-)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Build/2021-10-11-16-27-38.bpo-45405.iSfdW5.rst
|
||||||
|
|
||||||
|
diff --git a/Misc/NEWS.d/next/Build/2021-10-11-16-27-38.bpo-45405.iSfdW5.rst b/Misc/NEWS.d/next/Build/2021-10-11-16-27-38.bpo-45405.iSfdW5.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..13c93d1b8a
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Build/2021-10-11-16-27-38.bpo-45405.iSfdW5.rst
|
||||||
|
@@ -0,0 +1,2 @@
|
||||||
|
+Prevent ``internal configure error`` when running ``configure``
|
||||||
|
+with recent versions of clang. Patch by David Bohman.
|
||||||
|
diff --git a/configure b/configure
|
||||||
|
index fb0a499145..67e6e69b5f 100755
|
||||||
|
--- a/configure
|
||||||
|
+++ b/configure
|
||||||
|
@@ -5203,9 +5203,6 @@ $as_echo "$as_me:
|
||||||
|
fi
|
||||||
|
|
||||||
|
|
||||||
|
-MULTIARCH=$($CC --print-multiarch 2>/dev/null)
|
||||||
|
-
|
||||||
|
-
|
||||||
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the platform triplet based on compiler characteristics" >&5
|
||||||
|
$as_echo_n "checking for the platform triplet based on compiler characteristics... " >&6; }
|
||||||
|
cat >> conftest.c <<EOF
|
||||||
|
@@ -5334,6 +5331,11 @@ $as_echo "none" >&6; }
|
||||||
|
fi
|
||||||
|
rm -f conftest.c conftest.out
|
||||||
|
|
||||||
|
+if test x$PLATFORM_TRIPLET != xdarwin; then
|
||||||
|
+ MULTIARCH=$($CC --print-multiarch 2>/dev/null)
|
||||||
|
+fi
|
||||||
|
+
|
||||||
|
+
|
||||||
|
if test x$PLATFORM_TRIPLET != x && test x$MULTIARCH != x; then
|
||||||
|
if test x$PLATFORM_TRIPLET != x$MULTIARCH; then
|
||||||
|
as_fn_error $? "internal configure error for the platform triplet, please file a bug report" "$LINENO" 5
|
||||||
|
diff --git a/configure.ac b/configure.ac
|
||||||
|
index d86dad9a7c..468ad6070f 100644
|
||||||
|
--- a/configure.ac
|
||||||
|
+++ b/configure.ac
|
||||||
|
@@ -747,9 +747,6 @@ then
|
||||||
|
fi
|
||||||
|
|
||||||
|
|
||||||
|
-MULTIARCH=$($CC --print-multiarch 2>/dev/null)
|
||||||
|
-AC_SUBST(MULTIARCH)
|
||||||
|
-
|
||||||
|
AC_MSG_CHECKING([for the platform triplet based on compiler characteristics])
|
||||||
|
cat >> conftest.c <<EOF
|
||||||
|
#undef bfin
|
||||||
|
@@ -875,6 +872,11 @@ else
|
||||||
|
fi
|
||||||
|
rm -f conftest.c conftest.out
|
||||||
|
|
||||||
|
+if test x$PLATFORM_TRIPLET != xdarwin; then
|
||||||
|
+ MULTIARCH=$($CC --print-multiarch 2>/dev/null)
|
||||||
|
+fi
|
||||||
|
+AC_SUBST(MULTIARCH)
|
||||||
|
+
|
||||||
|
if test x$PLATFORM_TRIPLET != x && test x$MULTIARCH != x; then
|
||||||
|
if test x$PLATFORM_TRIPLET != x$MULTIARCH; then
|
||||||
|
AC_MSG_ERROR([internal configure error for the platform triplet, please file a bug report])
|
||||||
|
--
|
||||||
|
2.32.0 (Apple Git-132)
|
||||||
|
|
|
@ -0,0 +1,41 @@
|
||||||
|
From 002501946bad91a308f37a09204393c172f03c3e Mon Sep 17 00:00:00 2001
|
||||||
|
From: Takumi Sueda <puhitaku@gmail.com>
|
||||||
|
Date: Sat, 11 Sep 2021 16:50:14 +0900
|
||||||
|
Subject: [PATCH 2/6] Detect arm64 in configure
|
||||||
|
|
||||||
|
---
|
||||||
|
configure | 3 +++
|
||||||
|
configure.ac | 3 +++
|
||||||
|
2 files changed, 6 insertions(+)
|
||||||
|
|
||||||
|
diff --git a/configure b/configure
|
||||||
|
index e39c16eee2..8dc1fc7595 100755
|
||||||
|
--- a/configure
|
||||||
|
+++ b/configure
|
||||||
|
@@ -9230,6 +9230,9 @@ fi
|
||||||
|
ppc)
|
||||||
|
MACOSX_DEFAULT_ARCH="ppc64"
|
||||||
|
;;
|
||||||
|
+ arm64)
|
||||||
|
+ MACOSX_DEFAULT_ARCH="arm64"
|
||||||
|
+ ;;
|
||||||
|
*)
|
||||||
|
as_fn_error $? "Unexpected output of 'arch' on OSX" "$LINENO" 5
|
||||||
|
;;
|
||||||
|
diff --git a/configure.ac b/configure.ac
|
||||||
|
index cf280506bd..34846a7df3 100644
|
||||||
|
--- a/configure.ac
|
||||||
|
+++ b/configure.ac
|
||||||
|
@@ -2435,6 +2435,9 @@ case $ac_sys_system/$ac_sys_release in
|
||||||
|
ppc)
|
||||||
|
MACOSX_DEFAULT_ARCH="ppc64"
|
||||||
|
;;
|
||||||
|
+ arm64)
|
||||||
|
+ MACOSX_DEFAULT_ARCH="arm64"
|
||||||
|
+ ;;
|
||||||
|
*)
|
||||||
|
AC_MSG_ERROR([Unexpected output of 'arch' on OSX])
|
||||||
|
;;
|
||||||
|
--
|
||||||
|
2.30.1 (Apple Git-130)
|
||||||
|
|
|
@ -0,0 +1,48 @@
|
||||||
|
From 8ea6353f60625c96ce96588c70ff24a77f8c71f9 Mon Sep 17 00:00:00 2001
|
||||||
|
From: Ronald Oussoren <ronaldoussoren@mac.com>
|
||||||
|
Date: Thu, 25 Jun 2020 16:55:48 +0200
|
||||||
|
Subject: [PATCH] BPO-41100: Support macOS 11 when building (GH-21113)
|
||||||
|
|
||||||
|
---
|
||||||
|
Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst | 1 +
|
||||||
|
configure | 2 +-
|
||||||
|
configure.ac | 2 +-
|
||||||
|
3 files changed, 3 insertions(+), 2 deletions(-)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
|
||||||
|
|
||||||
|
diff --git a/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst b/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..ded66b567a
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
|
||||||
|
@@ -0,0 +1 @@
|
||||||
|
+Support macOS 11 when building.
|
||||||
|
diff --git a/configure b/configure
|
||||||
|
index c51f396824..5024860ca4 100755
|
||||||
|
--- a/configure
|
||||||
|
+++ b/configure
|
||||||
|
@@ -3375,7 +3375,7 @@ $as_echo "#define _BSD_SOURCE 1" >>confdefs.h
|
||||||
|
# has no effect, don't bother defining them
|
||||||
|
Darwin/[6789].*)
|
||||||
|
define_xopen_source=no;;
|
||||||
|
- Darwin/1[0-9].*)
|
||||||
|
+ Darwin/[12][0-9].*)
|
||||||
|
define_xopen_source=no;;
|
||||||
|
# On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but
|
||||||
|
# used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined
|
||||||
|
diff --git a/configure.ac b/configure.ac
|
||||||
|
index 70deefb6b9..5a3e340aa3 100644
|
||||||
|
--- a/configure.ac
|
||||||
|
+++ b/configure.ac
|
||||||
|
@@ -495,7 +495,7 @@ case $ac_sys_system/$ac_sys_release in
|
||||||
|
# has no effect, don't bother defining them
|
||||||
|
Darwin/@<:@6789@:>@.*)
|
||||||
|
define_xopen_source=no;;
|
||||||
|
- Darwin/1@<:@0-9@:>@.*)
|
||||||
|
+ Darwin/@<:@[12]@:>@@<:@0-9@:>@.*)
|
||||||
|
define_xopen_source=no;;
|
||||||
|
# On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but
|
||||||
|
# used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined
|
||||||
|
--
|
||||||
|
2.30.1 (Apple Git-130)
|
||||||
|
|
|
@ -0,0 +1,37 @@
|
||||||
|
From 604d95e235d86465b8c17f02095edcaf18464d4c Mon Sep 17 00:00:00 2001
|
||||||
|
From: Lawrence D'Anna <64555057+lawrence-danna-apple@users.noreply.github.com>
|
||||||
|
Date: Tue, 30 Jun 2020 02:15:46 -0700
|
||||||
|
Subject: [PATCH] bpo-41100: fix _decimal for arm64 Mac OS (GH-21228)
|
||||||
|
|
||||||
|
Patch by Lawrence Danna.
|
||||||
|
---
|
||||||
|
.../Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst | 1 +
|
||||||
|
Modules/_decimal/libmpdec/mpdecimal.h | 3 +++
|
||||||
|
2 files changed, 4 insertions(+)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst
|
||||||
|
|
||||||
|
diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst b/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..d6176d69f0
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst
|
||||||
|
@@ -0,0 +1 @@
|
||||||
|
+add arm64 to the allowable Mac OS arches in mpdecimal.h
|
||||||
|
\ No newline at end of file
|
||||||
|
diff --git a/Modules/_decimal/libmpdec/mpdecimal.h b/Modules/_decimal/libmpdec/mpdecimal.h
|
||||||
|
index 108b76efa8..35ce429f60 100644
|
||||||
|
--- a/Modules/_decimal/libmpdec/mpdecimal.h
|
||||||
|
+++ b/Modules/_decimal/libmpdec/mpdecimal.h
|
||||||
|
@@ -135,6 +135,9 @@ const char *mpd_version(void);
|
||||||
|
#elif defined(__x86_64__)
|
||||||
|
#define CONFIG_64
|
||||||
|
#define ASM
|
||||||
|
+ #elif defined(__arm64__)
|
||||||
|
+ #define CONFIG_64
|
||||||
|
+ #define ANSI
|
||||||
|
#else
|
||||||
|
#error "unknown architecture for universal build."
|
||||||
|
#endif
|
||||||
|
--
|
||||||
|
2.30.1 (Apple Git-130)
|
||||||
|
|
|
@ -0,0 +1,43 @@
|
||||||
|
From 54dc627769bf112b0181972a52c4b45e4a02da57 Mon Sep 17 00:00:00 2001
|
||||||
|
From: Inada Naoki <songofacandy@gmail.com>
|
||||||
|
Date: Tue, 14 May 2019 18:51:15 +0900
|
||||||
|
Subject: [PATCH 09/10] bpo-27987: pymalloc: align by 16bytes on 64bit platform
|
||||||
|
(GH-12850)
|
||||||
|
|
||||||
|
---
|
||||||
|
.../2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst | 3 +++
|
||||||
|
Objects/obmalloc.c | 6 ++++++
|
||||||
|
2 files changed, 9 insertions(+)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
|
||||||
|
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst b/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..b0f32a5c6c
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-04-16-11-52-21.bpo-27987.n2_DcQ.rst
|
||||||
|
@@ -0,0 +1,3 @@
|
||||||
|
+pymalloc returns memory blocks aligned by 16 bytes, instead of 8 bytes, on
|
||||||
|
+64-bit platforms to conform x86-64 ABI. Recent compilers assume this alignment
|
||||||
|
+more often. Patch by Inada Naoki.
|
||||||
|
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
|
||||||
|
index d46d149311..47283354f4 100644
|
||||||
|
--- a/Objects/obmalloc.c
|
||||||
|
+++ b/Objects/obmalloc.c
|
||||||
|
@@ -650,8 +650,14 @@ static int running_on_valgrind = -1;
|
||||||
|
*
|
||||||
|
* You shouldn't change this unless you know what you are doing.
|
||||||
|
*/
|
||||||
|
+
|
||||||
|
+#if SIZEOF_VOID_P > 4
|
||||||
|
+#define ALIGNMENT 16 /* must be 2^N */
|
||||||
|
+#define ALIGNMENT_SHIFT 4
|
||||||
|
+#else
|
||||||
|
#define ALIGNMENT 8 /* must be 2^N */
|
||||||
|
#define ALIGNMENT_SHIFT 3
|
||||||
|
+#endif
|
||||||
|
|
||||||
|
/* Return the number of bytes in size class I, as a uint. */
|
||||||
|
#define INDEX2SIZE(I) (((uint)(I) + 1) << ALIGNMENT_SHIFT)
|
||||||
|
--
|
||||||
|
2.38.4
|
||||||
|
|
|
@ -0,0 +1,40 @@
|
||||||
|
From e68ff170dc6764b22886e703f583fb53e90367ef Mon Sep 17 00:00:00 2001
|
||||||
|
From: Inada Naoki <songofacandy@gmail.com>
|
||||||
|
Date: Sat, 25 May 2019 21:13:33 +0900
|
||||||
|
Subject: [PATCH 10/10] bpo-27987: align PyGC_Head to alignof(long double)
|
||||||
|
(GH-13335)
|
||||||
|
|
||||||
|
---
|
||||||
|
Include/objimpl.h | 6 +++++-
|
||||||
|
.../2019-05-15-18-28-43.bpo-27987.FaxuLy.rst | 2 ++
|
||||||
|
2 files changed, 7 insertions(+), 1 deletion(-)
|
||||||
|
create mode 100644 Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
|
||||||
|
diff --git a/Include/objimpl.h b/Include/objimpl.h
|
||||||
|
index e7a3696d7a..90d71b87ea 100644
|
||||||
|
--- a/Include/objimpl.h
|
||||||
|
+++ b/Include/objimpl.h
|
||||||
|
@@ -255,7 +255,11 @@ typedef union _gc_head {
|
||||||
|
union _gc_head *gc_prev;
|
||||||
|
Py_ssize_t gc_refs;
|
||||||
|
} gc;
|
||||||
|
- double dummy; /* force worst-case alignment */
|
||||||
|
+ long double dummy; /* force worst-case alignment */
|
||||||
|
+ // malloc returns memory block aligned for any built-in types and
|
||||||
|
+ // long double is the largest standard C type.
|
||||||
|
+ // On amd64 linux, long double requires 16 byte alignment.
|
||||||
|
+ // See bpo-27987 for more discussion.
|
||||||
|
} PyGC_Head;
|
||||||
|
|
||||||
|
extern PyGC_Head *_PyGC_generation0;
|
||||||
|
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst b/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
new file mode 100644
|
||||||
|
index 0000000000..97ca37b262
|
||||||
|
--- /dev/null
|
||||||
|
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-05-15-18-28-43.bpo-27987.FaxuLy.rst
|
||||||
|
@@ -0,0 +1,2 @@
|
||||||
|
+``PyGC_Head`` structure is aligned to ``long double``. This is needed to
|
||||||
|
+GC-ed objects are aligned properly. Patch by Inada Naoki.
|
||||||
|
--
|
||||||
|
2.38.4
|
||||||
|
|
Loading…
Reference in a new issue