From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=45899 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Q8ykL-0002ph-MG for qemu-devel@nongnu.org; Sun, 10 Apr 2011 13:48:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Q8ykK-0003ly-1P for qemu-devel@nongnu.org; Sun, 10 Apr 2011 13:48:25 -0400 Received: from mail-qy0-f173.google.com ([209.85.216.173]:51954) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Q8ykJ-0003li-RT for qemu-devel@nongnu.org; Sun, 10 Apr 2011 13:48:23 -0400 Received: by qyk36 with SMTP id 36so911463qyk.4 for ; Sun, 10 Apr 2011 10:48:23 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <20110410132415.GA6719@volta.aurel32.net> From: Artyom Tarasenko Date: Sun, 10 Apr 2011 19:48:03 +0200 Message-ID: Subject: Re: [Qemu-devel] tcg/tcg.c:1892: tcg fatal error Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Blue Swirl Cc: peter.maydell@linaro.org, qemu-devel , Aurelien Jarno On Sun, Apr 10, 2011 at 4:44 PM, Blue Swirl wrote: > On Sun, Apr 10, 2011 at 5:09 PM, Artyom Tarasenko w= rote: >> On Sun, Apr 10, 2011 at 3:24 PM, Aurelien Jarno w= rote: >>> On Sun, Apr 10, 2011 at 02:29:59PM +0200, Artyom Tarasenko wrote: >>>> Trying to boot some proprietary OS I get qemu-system-sparc64 crash wit= h a >>>> >>>> tcg/tcg.c:1892: tcg fatal error >>>> >>>> error message. >>>> >>>> It looks like it can be a platform independent bug though, because >>>> when a '-singlestep' option IS present, qemu doesn't crash and seems >>>> to translate the code properly. >>>> >>>> (gdb) bt >>>> #0 =A00x00000032c2e327f5 in raise () from /lib64/libc.so.6 >>>> #1 =A00x00000032c2e33fd5 in abort () from /lib64/libc.so.6 >>>> #2 =A00x000000000051933d in tcg_reg_alloc_call (s=3D, >>>> def=3D0x89d340, opc=3DINDEX_op_call, args=3D0x10acc98, dead_iargs=3D3)= at >>>> qemu/tcg/tcg.c:1892 >>>> #3 =A00x000000000051a557 in tcg_gen_code_common (s=3D0x10b8940, >>>> gen_code_buf=3D0x40338b60 "I\213n@H\213] 3\355I\211\256\220") at >>>> qemu/tcg/tcg.c:2099 >>>> #4 =A0tcg_gen_code (s=3D0x10b8940, gen_code_buf=3D0x40338b60 "I\213n@H= \213] >>>> 3\355I\211\256\220") at qemu/tcg/tcg.c:2142 >>>> #5 =A00x00000000004d38f1 in cpu_sparc_gen_code (env=3D0x10cce10, >>>> tb=3D0x7fffe91bc218, gen_code_size_ptr=3D0x7fffffffd9b4) at >>>> qemu/translate-all.c:93 >>>> #6 =A00x00000000004d1fd7 in tb_gen_code (env=3D0x10cce10, pc=3D1886877= 6, >>>> cs_base=3D18868780, flags=3D15, cflags=3D0) at qemu/exec.c:989 >>>> #7 =A00x00000000004d4029 in tb_find_slow (env1=3D= ) at >>>> qemu/cpu-exec.c:167 >>>> #8 =A0tb_find_fast (env1=3D) at cpu-exec.c:194 >>>> #9 =A0cpu_sparc_exec (env1=3D) at qemu/cpu-exec.c= :556 >>>> #10 0x0000000000408868 in tcg_cpu_exec () at qemu/cpus.c:1066 >>>> #11 cpu_exec_all () at qemu/cpus.c:1102 >>>> #12 0x000000000053c756 in main_loop (argc=3D, >>>> argv=3D, envp=3D) at >>>> qemu/vl.c:1430 >>>> >>>> I inspected ts->val_type causing the abort() case and it turned out to= be 0. >>>> >>>> The last lines of qemu.log (without -singlestep) >>>> IN: >>>> 0x00000000011fe9f0: =A0rdpr =A0%pstate, %g1 >>>> 0x00000000011fe9f4: =A0wrpr =A0%g1, 2, %pstate >>>> -------------- >>>> IN: >>>> 0x00000000011fe9f8: =A0ldub =A0[ %o0 ], %o1 >>>> 0x00000000011fe9fc: =A0mov =A0%o1, %o2 >>>> 0x00000000011fea00: =A0rdpr =A0%tick, %o3 >>>> 0x00000000011fea04: =A0cmp =A0%o1, %o2 >>>> 0x00000000011fea08: =A0be =A0%icc, 0x11fea00 >>>> 0x00000000011fea0c: =A0ldub =A0[ %o0 ], %o2 >>>> >>>> Search PC... >>>> Search PC... >>>> Search PC... >>>> Search PC... >>>> Search PC... >>>> Search PC... >>>> -------------- >>>> IN: >>>> 0x00000000011fe9f8: =A0ldub =A0[ %o0 ], %o1 >>>> 0x00000000011fe9fc: =A0mov =A0%o1, %o2 >>>> 0x00000000011fea00: =A0rdpr =A0%tick, %o3 >>>> 0x00000000011fea04: =A0cmp =A0%o1, %o2 >>>> 0x00000000011fea08: =A0be =A0%icc, 0x11fea00 >>>> 0x00000000011fea0c: =A0ldub =A0[ %o0 ], %o2 >>>> >>>> 110521: Data Access MMU Miss (v=3D0068) pc=3D00000000011fe9f8 >>>> npc=3D00000000011fe9fc SP=3D000000000180ae41 >>>> pc: 00000000011fe9f8 =A0npc: 00000000011fe9fc >>>> >>>> IN: >>>> 0x00000000011fea00: =A0rdpr =A0%tick, %o3 >>>> 0x00000000011fea04: =A0cmp =A0%o1, %o2 >>>> 0x00000000011fea08: =A0be =A0%icc, 0x11fea00 >>>> 0x00000000011fea0c: =A0ldub =A0[ %o0 ], %o2 >>>> -------------- >>>> IN: >>>> 0x00000000011fea10: =A0brz,pn =A0 %o2, 0x11fe9f8 >>>> 0x00000000011fea14: =A0mov =A0%o2, %o4 >>>> -------------- >>>> IN: >>>> 0x00000000011fea18: =A0rdpr =A0%tick, %o5 >>>> 0x00000000011fea1c: =A0cmp =A0%o2, %o4 >>>> 0x00000000011fea20: =A0be =A0%icc, 0x11fea18 >>>> 0x00000000011fea24: =A0ldub =A0[ %o0 ], %o4 >>>> -------------- >>>> IN: >>>> 0x00000000011fea28: =A0brz,pn =A0 %o4, 0x11fe9f4 >>>> 0x00000000011fea2c: =A0wrpr =A0%g0, %g1, %pstate >>>> >>>> >>>> The crash is 100% reproducible and happens always on the same place, >>>> so it's probably a pure TCG issue, not related on getting the >>>> external/timer interrupts. >>>> >>>> Do you need any additional info? >>>> >>> >>> What would be interesting would be to get the corresponding TCG code >>> from qemu.log (-d op,op_opt). >> >> >> OP: >> =A0---- 0x11fea28 >> =A0ld_i64 tmp6,regwptr,$0x20 >> =A0movi_i64 cond,$0x0 >> =A0movi_i64 tmp8,$0x0 >> =A0brcond_i64 tmp6,tmp8,ne,$0x0 >> =A0movi_i64 cond,$0x1 >> =A0set_label $0x0 >> >> =A0---- 0x11fea2c >> =A0movi_i64 tmp7,$0x0 >> =A0xor_i64 tmp0,tmp7,g1 >> =A0movi_i64 pc,$0x11fea2c >> =A0movi_i64 tmp8,$compute_psr >> =A0call tmp8,$0x0,$0 >> =A0movi_i64 tmp8,$0x0 >> =A0brcond_i64 cond,tmp8,eq,$0x1 >> =A0movi_i64 npc,$0x11fe9f4 >> =A0br $0x2 >> =A0set_label $0x1 >> =A0movi_i64 npc,$0x11fea30 >> =A0set_label $0x2 >> =A0movi_i64 tmp8,$wrpstate >> =A0call tmp8,$0x0,$0,tmp0 >> =A0mov_i64 pc,npc >> =A0movi_i64 tmp8,$0x4 >> =A0add_i64 npc,npc,tmp8 >> =A0exit_tb $0x0 >> >> OP after liveness analysis: >> =A0---- 0x11fea28 >> =A0ld_i64 tmp6,regwptr,$0x20 >> =A0movi_i64 cond,$0x0 >> =A0movi_i64 tmp8,$0x0 >> =A0brcond_i64 tmp6,tmp8,ne,$0x0 >> =A0movi_i64 cond,$0x1 >> =A0set_label $0x0 >> >> =A0---- 0x11fea2c >> =A0nopn $0x2,$0x2 >> =A0nopn $0x3,$0x68,$0x3 >> =A0movi_i64 pc,$0x11fea2c >> =A0movi_i64 tmp8,$compute_psr >> =A0call tmp8,$0x0,$0 >> =A0movi_i64 tmp8,$0x0 >> =A0brcond_i64 cond,tmp8,eq,$0x1 >> =A0movi_i64 npc,$0x11fe9f4 >> =A0br $0x2 >> =A0set_label $0x1 >> =A0movi_i64 npc,$0x11fea30 >> =A0set_label $0x2 >> =A0movi_i64 tmp8,$wrpstate >> =A0call tmp8,$0x0,$0,tmp0 >> =A0mov_i64 pc,npc >> =A0movi_i64 tmp8,$0x4 >> =A0add_i64 npc,npc,tmp8 >> =A0exit_tb $0x0 >> =A0end >> >> Does it mean the last block is processed correctly and the crash >> happens on the next instruction which doesn't make it to the log? >> The next instruction would be a >> >> 0x00000000011fea30: =A0retl >> >> Since it's a branch instruction I guess this would also be a tcg block b= oundary. > > Because abort() was called from tcg_reg_alloc_call, I'd say 'retl' > (synthetic op for 'jmpl %o8 + 8, %g0') was the problem. Any idea why? retl is not a rare instruction... --=20 Regards, Artyom Tarasenko solaris/sparc under qemu blog: http://tyom.blogspot.com/