Module Name: src
Committed By: rin
Date: Thu Oct 8 08:31:37 UTC 2020
Modified Files:
src/doc: HACKS
src/external/gpl3/gdb.old/lib/libgdb: Makefile
Log Message:
GCC 9.3 miscompiles dwarf2{expr,loc}.c with -O2 for earmv5hf{,eb}
(-O1 is fine). This is a new regression introduced in GCC9.
For everyone's safety, extend -O0 hack to dwarf2{expr,loc}.c for
all arm variants with GCC >= 8.
To generate a diff of this commit:
cvs rdiff -u -r1.213 -r1.214 src/doc/HACKS
cvs rdiff -u -r1.10 -r1.11 src/external/gpl3/gdb.old/lib/libgdb/Makefile
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/doc/HACKS
diff -u src/doc/HACKS:1.213 src/doc/HACKS:1.214
--- src/doc/HACKS:1.213 Wed Oct 7 07:35:28 2020
+++ src/doc/HACKS Thu Oct 8 08:31:37 2020
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.213 2020/10/07 07:35:28 rin Exp $
+# $NetBSD: HACKS,v 1.214 2020/10/08 08:31:37 rin Exp $
#
# This file is intended to document workarounds for currently unsolved
# (mostly) compiler bugs.
@@ -975,16 +975,17 @@ descr Disable optimization on tc.c, loge
function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const"
kcah
-port earmv7hf*
-hack compile gdb/dwarf2expr.c with -O0 for GCC[89] (toolchain/54820, 54877)
+port arm
+hack compile gdb/dwarf2{expr,loc}.c with -O0 for GCC[89] (PR/54820, 54877)
cdate Wed Apr 29 11:04:58 UTC 2020
-mdate Mon Oct 5 22:30:00 JST 2020
+mdate Thu Oct 8 17:00:00 JST 2020
who rin
file src/external/gpl3/gdb/lib/libgdb/Makefile: 1.22
-descr GCC 8.4 and 9.3 miscompile dwarf2expr.c with -O[21], which results in
- crashes with 'gdb_exception_RETURN_MASK_ERROR'. Note that this occurs
- only for earmv7hf{,eb} as far as I can see. Neither earmv6hf{,eb} nor
- earmv7{,eb} (softfloat) are affected.
+descr For earmv7hf{,eb}, GCC 8.4 and 9.3 miscompile dwarf2expr.c with -O[21].
+ For earmv5hf{,eb}, GCC 9.3 miscompiles dwarf2{expr,loc}.c with -O2
+ (GCC9 -O1 and GCC8 -O2 work fine). These result in GDB crash with
+ ``gdb_exception_RETURN_MASK_ERROR''. For everyone's safety, compile
+ these files with -O0 for all arm variants with GCC >= 8.
kcah
port m68k
Index: src/external/gpl3/gdb.old/lib/libgdb/Makefile
diff -u src/external/gpl3/gdb.old/lib/libgdb/Makefile:1.10 src/external/gpl3/gdb.old/lib/libgdb/Makefile:1.11
--- src/external/gpl3/gdb.old/lib/libgdb/Makefile:1.10 Mon Sep 14 00:40:43 2020
+++ src/external/gpl3/gdb.old/lib/libgdb/Makefile Thu Oct 8 08:31:37 2020
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.10 2020/09/14 00:40:43 christos Exp $
+# $NetBSD: Makefile,v 1.11 2020/10/08 08:31:37 rin Exp $
NOCTF=
HOSTPROG_CXX= 1
@@ -54,12 +54,14 @@ CFLAGS:= ${CXXFLAGS} -std=gnu++11 -Wno-
ada-exp.c: ada-lex.c
-.if defined(HAVE_GCC) && ${HAVE_GCC} >= 8 && ${ACTIVE_CC} == "gcc"
-.if !empty(MACHINE_ARCH:Mearmv7hf*)
-# GCC 8.4 miscompiles this with -O2 or -O1 for earmv7hf{,eb}.
-# Neither earmv6hf{,eb} nor earmv7{,eb} are affected.
-COPTS.dwarf2expr.c+=-O0
-.endif
+.if ${MACHINE_CPU} == "arm"
+. if ${ACTIVE_CC} == "gcc" && ${HAVE_GCC:U0} >= 8
+# GCC 8.4/9.3 miscompile this with -O[21] for earmv7hf{,eb}.
+# GCC 9.3 miscompile this with -O2 for earmv5hf{,eb}.
+COPTS.dwarf2expr.c+= -O0
+# GCC 9.3 miscompile this with -O2 for earmv5hf{,eb}.
+COPTS.dwarf2loc.c+= -O0
+. endif
.endif
# These are generated by implicit rules and are not easy to generate
