When specifying CMAKE_BUILD_TYPE=Release the rexx image does not build on
Tumbleweed. It receives a segmentation fault in MemorySegmentPool::newSegment().
This was an opportunity to look into how this image is built. This is what
happens:
utilities/rexximage.cpp calls RexxCreateInterpreterImage() in
api/InterpreterAPI.cpp
==> Interpreter::startInterpreter with SAVE_IMAGE_MODE in
interpreter/runtime/Interpreter.cpp
==> calls memoryObject.initialize(mode == RUN_MODE) in
interpreter/memory/RexxMemory.cpp
==> createImage() which is in interpreter/memory/Setup.cpp sets up
==> interpreter/memory/RexxMemory.cpp MemoryObject::saveImage() saves the image
to a file
When I debug ./rexximage it fails in above call. Compiler is gnu 6.1.1. With
this working on other compilers and other platforms, it might be a compiler
bug; on the other hand, structures might be bigger and we run out of space.
Anyone seen this before?
Reading symbols from ./rexximage...done.
(gdb) run
Starting program: /home/rvjansen/workspace/workspace/build/bin/rexximage
Missing separate debuginfos, use: zypper install
glibc-debuginfo-2.23-4.12.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7b5f517 in MemorySegmentPool::newSegment(unsigned long) ()
from /home/rvjansen/workspace/workspace/build/bin/librexx.so.5.0.0
Missing separate debuginfos, use: zypper install
libgcc_s1-debuginfo-6.1.1+r236988-1.6.x86_64
libstdc++6-debuginfo-6.1.1+r236988-1.6.x86_64
(gdb) disassemble
Dump of assembler code for function _ZN17MemorySegmentPool10newSegmentEm:
0x00007ffff7b5f4c0 <+0>: push %r13
0x00007ffff7b5f4c2 <+2>: push %r12
0x00007ffff7b5f4c4 <+4>: lea 0xfff(%rsi),%r12
0x00007ffff7b5f4cb <+11>: push %rbp
0x00007ffff7b5f4cc <+12>: push %rbx
0x00007ffff7b5f4cd <+13>: mov %rdi,%rbp
0x00007ffff7b5f4d0 <+16>: mov %rsi,%r13
0x00007ffff7b5f4d3 <+19>: and $0xfffffffffffff000,%r12
0x00007ffff7b5f4da <+26>: sub $0x8,%rsp
0x00007ffff7b5f4de <+30>: jmp 0x7ffff7b5f517
<_ZN17MemorySegmentPool10newSegmentEm+87>
0x00007ffff7b5f4e0 <+32>: mov 0x20(%rbp),%rdx
0x00007ffff7b5f4e4 <+36>: cmp %rdx,%r12
0x00007ffff7b5f4e7 <+39>: jbe 0x7ffff7b5f540
<_ZN17MemorySegmentPool10newSegmentEm+128>
0x00007ffff7b5f4e9 <+41>: mov %r13,%rsi
0x00007ffff7b5f4ec <+44>: mov $0x38,%edi
0x00007ffff7b5f4f1 <+49>: callq 0x7ffff7ab0530
<_ZN17MemorySegmentPoolnwEmm@plt>
0x00007ffff7b5f4f6 <+54>: mov %rax,%rdi
0x00007ffff7b5f4f9 <+57>: mov %rax,%rbx
0x00007ffff7b5f4fc <+60>: callq 0x7ffff7ab33a0
<_ZN17MemorySegmentPoolC1Ev@plt>
0x00007ffff7b5f501 <+65>: mov 0x2671b8(%rip),%rdi #
0x7ffff7dc66c0
0x00007ffff7b5f508 <+72>: mov %rbx,0x0(%rbp)
0x00007ffff7b5f50c <+76>: mov %rbx,%rsi
0x00007ffff7b5f50f <+79>: mov %rbx,%rbp
0x00007ffff7b5f512 <+82>: callq 0x7ffff7ab7c10
<_ZN12MemoryObject15memoryPoolAddedEP17MemorySegmentPool@plt>
=> 0x00007ffff7b5f517 <+87>: mov 0x8(%rbp),%rax
0x00007ffff7b5f51b <+91>: test %rax,%rax
0x00007ffff7b5f51e <+94>: je 0x7ffff7b5f4e0
<_ZN17MemorySegmentPool10newSegmentEm+32>
0x00007ffff7b5f520 <+96>: cmp (%rax),%r13
0x00007ffff7b5f523 <+99>: ja 0x7ffff7b5f4e0
<_ZN17MemorySegmentPool10newSegmentEm+32>
0x00007ffff7b5f525 <+101>: movq $0x0,0x8(%rbp)
0x00007ffff7b5f52d <+109>: add $0x8,%rsp
0x00007ffff7b5f531 <+113>: pop %rbx
0x00007ffff7b5f532 <+114>: pop %rbp
0x00007ffff7b5f533 <+115>: pop %r12
0x00007ffff7b5f535 <+117>: pop %r13
0x00007ffff7b5f537 <+119>: retq
0x00007ffff7b5f538 <+120>: nopl 0x0(%rax,%rax,1)
0x00007ffff7b5f540 <+128>: mov 0x10(%rbp),%rax
I set the OpenSUSE build back to non-optimizing.
best regards,
René.
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