[llvm] r260338 - [Orc] Add lazy-JITting support for i386.
Dimitry Andric via llvm-commits
llvm-commits at lists.llvm.org
Sun Feb 21 05:42:31 PST 2016
On 10 Feb 2016, at 02:02, Lang Hames via llvm-commits <llvm-commits at lists.llvm.org> wrote:
>
> Author: lhames
> Date: Tue Feb 9 19:02:33 2016
> New Revision: 260338
>
> URL: http://llvm.org/viewvc/llvm-project?rev=260338&view=rev
> Log:
> [Orc] Add lazy-JITting support for i386.
>
> This patch adds a new class, OrcI386, which contains the hooks needed to
> support lazy-JITing on i386 (currently only for Pentium 2 or above, as the JIT
> re-entry code uses the FXSAVE/FXRSTOR instructions).
>
> Support for i386 is enabled in the LLI lazy JIT and the Orc C API, and
> regression and unit tests are enabled for this architecture.
Hi,
I was wondering why I was always getting OrcLazy test failures on i386-freebsd recently, but it appears to have been introduced with this commit. :)
All the OrcLazy tests result in lli getting a SIGBUS:
FAIL: LLVM :: ExecutionEngine/OrcLazy/anonymous_globals.ll (18054 of 25776)
******************** TEST 'LLVM :: ExecutionEngine/OrcLazy/anonymous_globals.ll' FAILED ********************
Script:
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/anonymous_globals.ll
--
Exit Code: 138
Command Output (stderr):
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/test/ExecutionEngine/OrcLazy/Output/anonymous_globals.ll.script: line 1: 11213 Bus error (core dumped) /home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/anonymous_globals.ll
--
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60..
FAIL: LLVM :: ExecutionEngine/OrcLazy/global_aliases.ll (18064 of 25776)
******************** TEST 'LLVM :: ExecutionEngine/OrcLazy/global_aliases.ll' FAILED ********************
Script:
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/global_aliases.ll
--
Exit Code: 138
Command Output (stderr):
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/test/ExecutionEngine/OrcLazy/Output/global_aliases.ll.script: line 1: 11214 Bus error (core dumped) /home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/global_aliases.ll
--
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60..
FAIL: LLVM :: ExecutionEngine/OrcLazy/hello.ll (18077 of 25776)
******************** TEST 'LLVM :: ExecutionEngine/OrcLazy/hello.ll' FAILED ********************
Script:
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy -orc-lazy-debug=funcs-to-stdout /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/hello.ll | /home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/FileCheck /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/hello.ll
--
Exit Code: 2
Command Output (stderr):
--
FileCheck error: '-' is empty.
--
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60..
FAIL: LLVM :: ExecutionEngine/OrcLazy/private_linkage.ll (18078 of 25776)
******************** TEST 'LLVM :: ExecutionEngine/OrcLazy/private_linkage.ll' FAILED ********************
Script:
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/private_linkage.ll
--
Exit Code: 138
Command Output (stderr):
--
/home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/test/ExecutionEngine/OrcLazy/Output/private_linkage.ll.script: line 1: 11218 Bus error (core dumped) /home/dim/obj/llvm-261275M-trunk-freebsd11-i386-ninja-rel-1/./bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/private_linkage.ll
--
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: LLVM-Unit :: ExecutionEngine/Orc/OrcJITTests/OrcCAPIExecutionTest.TestLazyIRCompilation (24756 of 25776)
******************** TEST 'LLVM-Unit :: ExecutionEngine/Orc/OrcJITTests/OrcCAPIExecutionTest.TestLazyIRCompilation' FAILED ********************
Note: Google Test filter = OrcCAPIExecutionTest.TestLazyIRCompilation
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from OrcCAPIExecutionTest
[ RUN ] OrcCAPIExecutionTest.TestLazyIRCompilation
********************
Unfortunately, the debugger seems to have trouble following the execution, so it does not really show anything interesting in the stack trace:
(gdb) run
Starting program: /home/dim/obj/llvm-orc-r260338/bin/lli -jit-kind=orc-lazy /share/dim/src/llvm/trunk/test/ExecutionEngine/OrcLazy/private_linkage.ll
[New Thread 29612000 (LWP 101099)]
Program received signal SIGBUS, Bus error.
[Switching to Thread 29612000 (LWP 101099)]
0x28fa600f in ?? ()
(gdb) bt
#0 0x28fa600f in ?? ()
#1 0x2913aff5 in ?? ()
#2 0x0815adcd in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>)
at /share/dim/src/llvm/trunk/tools/lli/lli.cpp:414
It appears to die on an fxsave instruction, though:
(gdb) disassemble 0x28fa6000,0x28fa6020
Dump of assembler code from 0x28fa6000 to 0x28fa6020:
0x28fa6000: push %ebp
0x28fa6001: mov %esp,%ebp
0x28fa6003: push %eax
0x28fa6004: push %ebx
0x28fa6005: push %ecx
0x28fa6006: push %edx
0x28fa6007: push %esi
0x28fa6008: push %edi
0x28fa6009: sub $0x21c,%esp
=> 0x28fa600f: fxsave 0x10(%esp)
0x28fa6014: mov 0x4(%ebp),%esi
0x28fa6017: sub $0x5,%esi
0x28fa601a: mov %esi,0x4(%esp)
0x28fa601e: movl $0x296182c0,(%esp)
End of assembler dump.
(gdb) info registers
eax 0xbfbfe6e0 -1077942560
ecx 0x2913bff0 689160176
edx 0x3 3
ebx 0x905e994 151382420
esp 0xbfbfd58c 0xbfbfd58c
ebp 0xbfbfd7c0 0xbfbfd7c0
esi 0xbfbfd7f0 -1077946384
edi 0xbfbfd820 -1077946336
eip 0x28fa600f 0x28fa600f
eflags 0x210292 [ AF SF IF RF ID ]
cs 0x33 51
ss 0x3b 59
ds 0x3b 59
es 0x3b 59
fs 0x3b 59
gs 0x1b 27
Any ideas on how to debug this further?
-Dimitry
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