https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81317
Alex Potapenko <opotapenko at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |opotapenko at gmail dot com
--- Comment #27 from Alex Potapenko <opotapenko at gmail dot com> ---
I'd like to chime in to do two things: first suggest a (simple) way to
reproduce this using buildroot (GCC 7.2.0), and then post a gdb backtrace in
case there's something useful there (not sure how much different from Randy's
log it is).
1. Reproducing.
1.1) Download and unpack
https://buildroot.org/downloads/buildroot-2017.08.tar.bz2
1.2) Save
https://raw.githubusercontent.com/Optware/Optware-ng/5b3cbfeb2bb2444d47ea15bcce3081ffbaea8046/sources/buildroot-ppc-603e/config
as ".config" in buildroot root
1.3) Patch buildroot to make gcc debuggable:
diff --git a/package/gcc/gcc-final/gcc-final.mk
b/package/gcc/gcc-final/gcc-final.mk
index 213f3d7..4364e2a 100644
--- a/package/gcc/gcc-final/gcc-final.mk
+++ b/package/gcc/gcc-final/gcc-final.mk
@@ -41,6 +41,7 @@ define HOST_GCC_FINAL_CONFIGURE_CMDS
(cd $(HOST_GCC_FINAL_SRCDIR) && rm -rf config.cache; \
$(HOST_CONFIGURE_OPTS) \
CFLAGS="$(HOST_CFLAGS)" \
+ CXXFLAGS="-ggdb -O0" \
LDFLAGS="$(HOST_LDFLAGS)" \
$(HOST_GCC_FINAL_CONF_ENV) \
./configure \
@@ -107,6 +108,8 @@ HOST_GCC_FINAL_CONF_ENV = \
HOST_GCC_FINAL_MAKE_OPTS += $(HOST_GCC_COMMON_MAKE_OPTS)
+HOST_GCC_FINAL_MAKE_OPTS += STAGE_CFLAGS="-ggdb -O0"
+
# Make sure we have 'cc'
define HOST_GCC_FINAL_CREATE_CC_SYMLINKS
if [ ! -e $(HOST_DIR)/bin/$(GNU_TARGET_NAME)-cc ]; then \
1.4) Build the toolchain with `make`. You'll have the toolchain in
"buildroot-2017.08/output/host" after build is done
2. Now, gdb log from built toolchain (note that test.c is the "smaller
reproducer with manual work-around" uploaded by Randy):
jenkins@u0:~/buildroot-2017.08$ gdb
/home/jenkins/buildroot-2017.08/output/host/libexec/gcc/powerpc-buildroot-linux-gnu/7.2.0/cc1
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from
/home/jenkins/buildroot-2017.08/output/host/libexec/gcc/powerpc-buildroot-linux-gnu/7.2.0/cc1...done.
(gdb) run -quiet -v -imultilib . -imultiarch powerpc-linux-gnu -isysroot
/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot
-D__unix__ -D__gnu_linux__ -D__linux__ -Dunix -D__unix -Dlinux -D__linux
-Asystem=linux -Asystem=unix -Asystem=posix test.c -quiet -dumpbase test.c
-maltivec -mcpu=603e -auxbase test -version -o -
Starting program:
/home/jenkins/buildroot-2017.08/output/host/libexec/gcc/powerpc-buildroot-linux-gnu/7.2.0/cc1
-quiet -v -imultilib . -imultiarch powerpc-linux-gnu -isysroot
/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot
-D__unix__ -D__gnu_linux__ -D__linux__ -Dunix -D__unix -Dlinux -D__linux
-Asystem=linux -Asystem=unix -Asystem=posix test.c -quiet -dumpbase test.c
-maltivec -mcpu=603e -auxbase test -version -o -
GNU C11 (Buildroot 2017.08-g9362d96-dirty) version 7.2.0
(powerpc-buildroot-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot/usr/local/include/powerpc-linux-gnu"
ignoring nonexistent directory
"/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot/usr/local/include"
ignoring nonexistent directory
"/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot/usr/include/powerpc-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/home/jenkins/buildroot-2017.08/output/host/lib/gcc/powerpc-buildroot-linux-gnu/7.2.0/include
/home/jenkins/buildroot-2017.08/output/host/lib/gcc/powerpc-buildroot-linux-gnu/7.2.0/include-fixed
/home/jenkins/buildroot-2017.08/output/host/lib/gcc/powerpc-buildroot-linux-gnu/7.2.0/../../../../powerpc-buildroot-linux-gnu/include
/home/jenkins/buildroot-2017.08/output/host/powerpc-buildroot-linux-gnu/sysroot/usr/include
End of search list.
GNU C11 (Buildroot 2017.08-g9362d96-dirty) version 7.2.0
(powerpc-buildroot-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 79638d26791d2fd1f2ddd744e299fa65
.file "test.c"
test.c:52:3: warning: unnamed struct/union that defines no instances
};
^
test.c:55:11: warning: ‘struct random_data’ declared inside parameter list will
not be visible outside of this definition or declaration
struct random_data *__restrict __buf)
^~~~~~~~~~~
Program received signal SIGSEGV, Segmentation fault.
0x00000000009df5fb in store_expr_with_bounds (exp=0x7ffff6943740,
target=0x7ffff6ac8fc0, call_param_p=0, nontemporal=false, reverse=false,
btarget=0x7ffff6942630) at ../../gcc/expr.c:5575
5575 if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode
(gdb) bt full
#0 0x00000000009df5fb in store_expr_with_bounds (exp=0x7ffff6943740,
target=0x7ffff6ac8fc0, call_param_p=0, nontemporal=false, reverse=false,
btarget=0x7ffff6942630) at ../../gcc/expr.c:5575
temp = 0x0
alt_rtl = 0x0
loc = 2147483665
__FUNCTION__ = "store_expr_with_bounds"
#1 0x00000000009de7ee in expand_assignment (to=0x7ffff6942630,
from=0x7ffff6943740, nontemporal=false) at ../../gcc/expr.c:5321
to_rtx = 0x7ffff6ac8fc0
result = 0x0
mode = V16QImode
align = 4137801472
icode = 4294957840
__FUNCTION__ = "expand_assignment"
#2 0x00000000008a1b1b in expand_call_stmt (stmt=0x7ffff6ad45a0) at
../../gcc/cfgexpand.c:2656
exp = 0x7ffff6943740
decl = 0x7ffff6a1d700
lhs = 0x7ffff6942630
builtin_p = true
i = 2
__FUNCTION__ = "expand_call_stmt"
#3 0x00000000008a4645 in expand_gimple_stmt_1 (stmt=0x7ffff6ad45a0) at
../../gcc/cfgexpand.c:3571
op0 = 0x7fffffffdcb0
__FUNCTION__ = "expand_gimple_stmt_1"
#4 0x00000000008a4bfa in expand_gimple_stmt (stmt=0x7ffff6ad45a0) at
../../gcc/cfgexpand.c:3737
saved_location = 566396
last = 0x7ffff6ad8658
lp_nr = 0
__FUNCTION__ = "expand_gimple_stmt"
#5 0x00000000008aae3b in expand_gimple_basic_block (bb=0x7ffff6a9b270,
disable_tail_calls=false) at ../../gcc/cfgexpand.c:5744
def_p = 0x7ffff6ad4608
call_stmt = 0x7ffff6ad45a0
new_bb = 0x0
gsi = {ptr = 0x7ffff6ad45a0, seq = 0x7fffffffdd78, bb = 0x7ffff6a9b270}
stmts = 0x7ffff6ad45a0
stmt = 0x7ffff6ad45a0
note = 0x7ffff6ad8658
last = 0x7ffff6942e58
e = 0x0
ei = {index = 2, container = 0x7ffff6a9b210}
__FUNCTION__ = "expand_gimple_basic_block"
elt = 0x0
#6 0x00000000008ac3d5 in (anonymous namespace)::pass_expand::execute
(this=0x21fbba0, fun=0x7ffff6acd000) at ../../gcc/cfgexpand.c:6357
bb = 0x7ffff6a9b270
init_block = 0x7ffff6a9b548
ei = {index = 1, container = 0x7ffff6a9b070}
e = 0x0
var_seq = 0x0
var_ret_seq = 0x0
i = 26
name = 0x0
__FUNCTION__ = "execute"
blocks = {m_bitmap = 0x7fffffffdfb0}
#7 0x0000000000ca27e4 in execute_one_pass (pass=0x21fbba0) at
../../gcc/passes.c:2465
todo_after = 0
gate_status = true
__FUNCTION__ = "execute_one_pass"
#8 0x0000000000ca2b47 in execute_pass_list_1 (pass=0x21fbba0) at
../../gcc/passes.c:2554
__FUNCTION__ = "execute_pass_list_1"
#9 0x0000000000ca2bd0 in execute_pass_list (fn=0x7ffff6acd000, pass=0x21f8090)
at ../../gcc/passes.c:2565
__FUNCTION__ = "execute_pass_list"
#10 0x00000000008ef168 in cgraph_node::expand (this=0x7ffff6ad7000) at
../../gcc/cgraphunit.c:2042
saved_loc = 664512
__FUNCTION__ = "expand"
#11 0x00000000008efa4f in output_in_order (no_reorder=false) at
../../gcc/cgraphunit.c:2285
max = 2
nodes = 0x21e8890
i = 0
pf = 0x0
pv = 0x0
pa = 0x0
__FUNCTION__ = "output_in_order"
#12 0x00000000008f00ca in symbol_table::compile (this=0x7ffff693b000) at
../../gcc/cgraphunit.c:2529
No locals.
#13 0x00000000008f031b in symbol_table::finalize_compilation_unit
(this=0x7ffff693b000) at ../../gcc/cgraphunit.c:2625
No locals.
#14 0x0000000000dbd01c in compile_file () at ../../gcc/toplev.c:492
No locals.
#15 0x0000000000dbf670 in do_compile () at ../../gcc/toplev.c:2003
i = 1
#16 0x0000000000dbf947 in toplev::main (this=0x7fffffffe230, argc=30,
argv=0x7fffffffe338) at ../../gcc/toplev.c:2137
__FUNCTION__ = "main"
#17 0x0000000001611e37 in main (argc=30, argv=0x7fffffffe338) at
../../gcc/main.c:39
toplev = {m_use_TV_TOTAL = true, m_init_signals = true}
Thanks. Hope this is useful,
Alex
