On 10 Sep 2018, at 18:20, Leslie Zhai via llvm-dev <llvm-...@lists.llvm.org>
wrote:
Hi all,
OpenJDK8 jdk8u-dev[1] is just able to work after compiled with LLVM 3.9.1 for
X86:
$ ./build/linux-x86_64-normal-server-slowdebug/images/j2sdk-image/bin/java
-version
openjdk version "1.8.0-internal-debug"
OpenJDK Runtime Environment (build
1.8.0-internal-debug-xiangzhai_2018_09_09_21_08-b00)
OpenJDK 64-Bit Server VM (build 25.71-b00-debug, mixed mode)
$ strings
./build/linux-x86_64-normal-server-slowdebug/images/j2sdk-image/bin/java | grep
clang
clang version 3.9.1 (tags/RELEASE_391/final)
But it failed to work after compiled with LLVM 8 for X86:
$ ./build/linux-x86_64-normal-server-fastdebug/images/j2sdk-image/bin/java
-version
Segmentation fault
$ gdb --ex run --args
./build/linux-x86_64-normal-server-fastdebug/images/j2sdk-image/bin/java
-version
GNU gdb (GDB) Fedora 7.12.1-48.fc25
...
Starting program:
/home/xiangzhai/project/jdk8u-llvm/build/linux-x86_64-normal-server-fastdebug/images/j2sdk-image/bin/java
-version
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
[ Legend: Modified register | Code | Heap | Stack | String ]
───────────────────────────────────────────────────────────────────────────────────────────────[
registers ]────
$rax : 0x0
$rbx : 0x0
$rcx : 0x7ffff7315eb0 → 0x00007ffff6ae30a0 →
<NativeCallStack::print_on(outputStream*)+0> xor edx, edx
$rdx : 0x0
$rsp : 0x7fffffff9328 → 0x00007ffff6a76822 →
<MemTracker::init_tracking_level()+178> mov edi, ebx
$rbp : 0x7fffffff93c0 → 0x00007fffffff94f0 → 0x00007fffffff9510 →
0x0000000000000002
$rsi : 0x0
$rdi : 0x7ffff7315e70 → 0x00007ffff7315eb0 → 0x00007ffff6ae30a0 →
<NativeCallStack::print_on(outputStream*)+0> xor edx, edx
$rip : 0x7ffff6ae2f5b → <NativeCallStack::NativeCallStack(int,+0> mov
QWORD PTR [rdi], rcx
$r8 : 0x1
$r9 : 0xf
$r10 : 0x64
$r11 : 0x0
$r12 : 0x7fffffffdc88 → 0x00007fffffffe04c →
"/home/xiangzhai/project/jdk8u-llvm/build/linux-x86[...]"
$r13 : 0x7fffffffdca0 → 0x00007fffffffe0bf → "XDG_VTNR=1"
$r14 : 0x7fffffff9330 → "NMT_LEVEL_10535"
$r15 : 0x6
$eflags: [carry parity adjust zero sign trap INTERRUPT direction overflow
RESUME virtualx86 identification]
$ss: 0x002b $ds: 0x0000 $cs: 0x0033 $es: 0x0000 $gs: 0x0000 $fs: 0x0000
───────────────────────────────────────────────────────────────────────────────────────────────────[
stack ]────
0x00007fffffff9328│+0x00: 0x00007ffff6a76822 →
<MemTracker::init_tracking_level()+178> mov edi, ebx ← $rsp
0x00007fffffff9330│+0x08: "NMT_LEVEL_10535" ← $r14
0x00007fffffff9338│+0x10: 0x0035333530315f4c ("L_10535"?)
0x00007fffffff9340│+0x18: 0x0000000000000001
0x00007fffffff9348│+0x20: 0x0000000000602190 → 0x00007ffff5eb7000 →
0x00010102464c457f
0x00007fffffff9350│+0x28: 0x0000000000000004
0x00007fffffff9358│+0x30: 0x000000066474e551
0x00007fffffff9360│+0x38: 0x0000000000000000
────────────────────────────────────────────────────────────────────────────────────────[
code:i386:x86-64 ]────
0x7ffff6ae2f4b <print_owned_locks_on_error(outputStream*)+187> add eax,
0x1f0f00
0x7ffff6ae2f50 <NativeCallStack::NativeCallStack(int,+0> mov rcx, QWORD
PTR [rip+0x842781] # 0x7ffff73256d8
0x7ffff6ae2f57 <NativeCallStack::NativeCallStack(int,+0> add rcx, 0x10
→ 0x7ffff6ae2f5b <NativeCallStack::NativeCallStack(int,+0> mov QWORD PTR
[rdi], rcx
0x7ffff6ae2f5e <NativeCallStack::NativeCallStack(int,+0> mov DWORD PTR
[rdi+0x28], 0x0
0x7ffff6ae2f65 <NativeCallStack::NativeCallStack(int,+0> add rdi, 0x8
0x7ffff6ae2f69 <NativeCallStack::NativeCallStack(int,+0> test edx, edx
0x7ffff6ae2f6b <NativeCallStack::NativeCallStack(int,+0> je 0x7ffff6ae2f7b
<NativeCallStack::NativeCallStack(int, bool)+43>
0x7ffff6ae2f6d <NativeCallStack::NativeCallStack(int,+0> mov eax, esi
─────────[
source:/home/xiangzhai/project/jdk8u-llvm/hotspot/src/share/vm/utilities/nativeCallStack.cpp+33
]────
28 #include "utilities/nativeCallStack.hpp"
29
30 const NativeCallStack NativeCallStack::EMPTY_STACK(0, false);
31
32 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :
→ 33 _hash_value(0) {
34
35 #if !PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
36 fillStack = false;
37 #endif
38
─────────────────────────────────────────────────────────────────────────────────────────────────[
threads ]────
[#0] Id 1, Name: "java", stopped, reason: SIGSEGV
───────────────────────────────────────────────────────────────────────────────────────────────────[
trace ]────
[#0] 0x7ffff6ae2f5b → Name: NativeCallStack::NativeCallStack(this=0x7ffff7315e70
<NativeCallStack::EMPTY_STACK>, toSkip=0x0, fillStack=0x0)
[#1] 0x7ffff6a76822 → Name: MemTracker::init_tracking_level()
[#2] 0x7ffff62eff49 → Name: MemTracker::tracking_level()
[#3] 0x7ffff62eff49 → Name: ResourceObj::operator new(size=0x20,
type=ResourceObj::STACK_OR_EMBEDDED, flags=<optimized out>)
[#4] 0x7ffff61369ec → Name: _GLOBAL__sub_I_c1_Greedy.cpp()
[#5] 0x7ffff7de7d9a → Name: call_init(l=<optimized out>, argc=0x2,
argv=0x7fffffffdc88, env=0x7fffffffdca0)
[#6] 0x7ffff7de7eab → Name: call_init(env=0x7fffffffdca0, argv=0x7fffffffdc88,
argc=0x2, l=<optimized out>)
[#7] 0x7ffff7de7eab → Name: _dl_init(main_map=0x602190, argc=0x2,
argv=0x7fffffffdc88, env=0x7fffffffdca0)
[#8] 0x7ffff7dece46 → Name: dl_open_worker(a=0x7fffffff97e0)
[#9] 0x7ffff7de7c44 → Name: _dl_catch_error(objname=0x7fffffff97d0,
errstring=0x7fffffff97d8, mallocedp=0x7fffffff97cf, operate=0x7ffff7decae0
<dl_open_worker>, args=0x7fffffff97e0)
────────────────────────────────────────────────────────────────────────────────────────────────────────────────
0x00007ffff6ae2f5b in NativeCallStack::NativeCallStack (this=0x7ffff7315e70
<NativeCallStack::EMPTY_STACK>, toSkip=0x0, fillStack=0x0) at
/home/xiangzhai/project/jdk8u-llvm/hotspot/src/share/vm/utilities/nativeCallStack.cpp:33
33 _hash_value(0) {
gef➤ c
Continuing.
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
gef➤
----- 8< -------- 8< -------- 8< -------- 8< -------- 8< -------- 8< ---
I started to use and contribute clang static analyzer[2] just for finding the
bugs for open source software from LLVM 3.x, perhaps it is a bug of LLVM 8,
because jdk8u is just able to print out '-version' after compiled with
llvm-3.9.1, I will rebuild the LLVM 8 again, then rebuild jdk8u for triple
check.
1. Workaround-compile-with-llvm.patch
https://raw.githubusercontent.com/xiangzhai/jdk8u-dev/master/Workaround-compile-with-llvm.patch
2.
https://github.com/llvm-mirror/clang/commit/a530e823ed2793ac149de7a984014e242a787682#diff-ff9160d4628cb9b6186559837c2c8668
3. The build option of LLVM 8 (bootstrap with LLVM 3.9.1):
cmake .. -DCMAKE_BUILD_TYPE=Release \
-DCMAKE_C_COMPILER=clang \
-DCMAKE_CXX_COMPILER=clang++ \
-DCMAKE_C_FLAGS="-fPIC" \
-DCMAKE_CXX_FLAGS="-std=c++11 -fPIC" \
-DLLVM_BUILD_LLVM_DYLIB=ON \
-DLLVM_LINK_LLVM_DYLIB=ON \
-DLLVM_INSTALL_UTILS=ON \
-DLLVM_ENABLE_RTTI=ON \
-DLLVM_ENABLE_FFI=ON \
-DLLVM_ENABLE_EH=ON \
-DLLVM_BUILD_TESTS=ON \
-DLLVM_BUILD_DOCS=OFF \
-DLLVM_ENABLE_SPHINX=OFF \
-DLLVM_ENABLE_DOXYGEN=OFF \
-DLLDB_DISABLE_LIBEDIT=1 \
-DSPHINX_WARNINGS_AS_ERRORS=OFF \
-DFFI_INCLUDE_DIR=$(pkg-config --variable=includedir libffi) \
-DFFI_LIBRARY_DIR:PATH="$(pkg-config --variable=libdir libffi)" \
-DLLVM_BINUTILS_INCDIR=/usr/include \
-DLLVM_LIBDIR_SUFFIX=64 \
-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=ON \
-DLIBUNWIND_ENABLE_SHARED=ON \
-DLIBCXXABI_USE_LLVM_UNWINDER=ON \
-DLLDB_TEST_C_COMPILER=clang \
-DLLDB_TEST_CXX_COMPILER=clang++ \
-DLLVM_DEFAULT_TARGET_TRIPLE="x86_64-redhat-linux" \
-DCLANG_VENDOR="LLVM China"
4. $ clang -v
LLVM China clang version 8.0.0 (g...@github.com:llvm-mirror/clang.git
81ef98628ebf5186d746c0986dcbf5073e842043) (g...@github.com:llvm-mirror/llvm.git
e1aac9723d55497e74d83d216329f08d9842e494) (based on LLVM 8.0.0svn)
Target: x86_64-redhat-linux
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-redhat-linux/6.4.1
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/6.4.1
Found candidate GCC installation: /usr/lib/gcc/i686-redhat-linux/6.4.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/6.4.1
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/6.4.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
--
Regards,
Leslie Zhai
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