Re: [BUG] perf test 21("Test object code reading") failure on ARM64

[Jan Stancek]

----- Original Message -----
> From: "Jiri Olsa" <jolsa@xxxxxxxxxx>
> To: "xiakaixu" <xiakaixu@xxxxxxxxxx>
> Cc: "adrian hunter" <adrian.hunter@xxxxxxxxx>, "Arnaldo Carvalho de Melo" <acme@xxxxxxxxxx>, "Ingo Molnar"
> <mingo@xxxxxxxxxx>, "masami hiramatsu pt" <masami.hiramatsu.pt@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, "Wangnan
> (F)" <wangnan0@xxxxxxxxxx>, "Jan Stancek" <jstancek@xxxxxxxxxx>
> Sent: Thursday, 17 December, 2015 1:09:26 PM
> Subject: Re: [BUG] perf test 21("Test object code reading") failure on ARM64
> 
> adding Jan Stancek to the loop
> 
> jirka
> 
> On Thu, Dec 17, 2015 at 07:41:43PM +0800, xiakaixu wrote:
> > Hi,
> > 
> > Perf test "Test object code reading" failed on ARM64 board and the test log
> > is here.
> > 
> > ######################################################################################
> > # perf test -v 21
> >   ...
> >   File is: /tmp/oxygen_root-root/lib64/libc-2.19-2014.08.so
> >   On file address is: 0x70c3c
> >   Objdump command is: objdump -z -d --start-address=0x70c3c
> >   --stop-address=0x70cbc /tmp/oxygen_root-root/lib64/libc-2.19-2014.08.so
> >   objdump read too few bytes
> >   Bytes read differ from those read by objdump
> >   buf1 (dso):
> >   0x16 0x58 0x41 0xb9 0xf6 0x0e 0x00 0x35 0x00 0x00 0x00 0x90 0xbf 0x27
> >   0x00 0xf9
> >   0x00 0x40 0x22 0x91 0xa0 0x23 0x00 0xf9 0xb4 0x06 0x00 0xf0 0x55 0xd0
> >   0x3b 0xd5
> >   0x80 0xe2 0x14 0x91 0xb5 0xc2 0x1b 0xd1 0x00 0x60 0x00 0x91 0x01 0x04
> >   0x40 0xf9
> >   0x3f 0x00 0x15 0xeb 0xc0 0x01 0x00 0x54 0xbf 0x3f 0x00 0xb9 0x21 0x00
> >   0x80 0x52
> >   0x02 0xfc 0x5f 0x88 0x5f 0x00 0x1f 0x6b 0x61 0x00 0x00 0x54 0x01 0x7c
> >   0x03 0x88
> >   0x83 0xff 0xff 0x35 0x40 0x00 0x00 0x54 0xa2 0x3f 0x00 0xb9 0xa0 0x3f
> >   0x40 0xb9
> >   0xc0 0x0f 0x00 0x35 0x80 0xe2 0x14 0x91 0x15 0x10 0x00 0xf9 0x80 0xe2
> >   0x14 0x91
> >   0x62 0x02 0x40 0xb9 0x44 0x00 0x11 0x12 0x01 0x1c 0x40 0xb9 0x13 0x08
> >   0x00 0xf9
> > 
> >   buf2 (objdump):
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> >   0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> >   0x00 0x00
> > 
> >   test child finished with -1
> >   ---- end ----
> >   Test object code reading: FAILED!
> > ######################################################################################
> > 
> > The result of objdump on ARM64 like this:
> >    ...
> >    70c40:	35000ef6 	cbnz	w22, 70e1c <_IO_link_in+0x208>
> >    70c44:	90000000 	adrp	x0, 70000 <_IO_file_fopen+0x164>
> >    70c48:	f90027bf 	str	xzr, [x29,#72]
> >    70c4c:	91224000 	add	x0, x0, #0x890
> >    70c50:	f90023a0 	str	x0, [x29,#64]
> >    70c54:	f00006b4 	adrp	x20, 147000 <__abort_msg+0x588>
> >    ...

Hi,

What is your objdump version?

> > 
> > So the following patch is needed.
> > diff --git a/tools/perf/tests/code-reading.c
> > b/tools/perf/tests/code-reading.c
> > index a767a64..1b55fa0 100644
> > --- a/tools/perf/tests/code-reading.c
> > +++ b/tools/perf/tests/code-reading.c
> > @@ -61,9 +61,6 @@ static size_t read_objdump_line(const char *line, size_t
> > line_len, void *buf,
> >                 if (i >= line_len || !isxdigit(line[i]))
> >                         break;
> >                 c2 = line[i++];
> > -               /* Followed by a space */
> > -               if (i < line_len && line[i] && !isspace(line[i]))
> > -                       break;
> >                 /* Store byte */
> >                 *(unsigned char *)buf = (hex(c1) << 4) | hex(c2);
> >                buf += 1;
> > 
> > After applying this patch, the test still failed.
> > ######################################################################################
> >   ...
> >   Objdump command is: objdump -z -d --start-address=0x7c4c4
> >   --stop-address=0x7c544 /tmp/oxygen_root-root/lib64/libc-2.19-2014.08.so
> >   Bytes read differ from those read by objdump
> >   buf1 (dso):
> >   0x00 0x00 0x80 0xd2 0xd5 0xff 0xff 0x17 0xe0 0x03 0x19 0xaa 0xd3 0xff
> >   0xff 0x17
> >   0xe1 0x03 0x14 0xaa 0xa2 0x63 0x02 0x91 0xe0 0x03 0x13 0xaa 0x66 0xfe
> >   0xff 0x97
> >   0xfc 0x03 0x00 0xaa 0xa0 0x4f 0x40 0xf9 0xe2 0x03 0x1c 0xaa 0xe1 0x03
> >   0x00 0xaa
> >   0x08 0x00 0x67 0x9e 0x61 0x02 0x01 0x8b 0xe0 0x03 0x13 0xaa 0x60 0x01
> >   0x00 0x94
> >   0xe0 0xf9 0xff 0x35 0x95 0x07 0x00 0xd1 0x1b 0x00 0x80 0xd2 0x01 0x01
> >   0x66 0x9e
> >   0x60 0x02 0x15 0x8b 0x17 0x00 0x1c 0xcb 0xf8 0x03 0x1b 0xaa 0x0a 0x00
> >   0x67 0x9e
> >   0x20 0x00 0x80 0xd2 0x00 0x00 0x1c 0xcb 0x81 0x02 0x01 0xcb 0x09 0x00
> >   0x67 0x9e
> >   0x2b 0x00 0x67 0x9e 0x16 0x03 0x14 0x8b 0x20 0x03 0x1a 0x8b 0x01 0x00
> >   0x80 0x52
> > 
> >   buf2 (objdump):
> >   0xd2 0x80 0x00 0x00 0x17 0xff 0xff 0xd5 0xaa 0x19 0x03 0xe0 0x17 0xff
> >   0xff 0xd3
> >   0xaa 0x14 0x03 0xe1 0x91 0x02 0x63 0xa2 0xaa 0x13 0x03 0xe0 0x97 0xff
> >   0xfe 0x66
> >   0xaa 0x00 0x03 0xfc 0xf9 0x40 0x4f 0xa0 0xaa 0x1c 0x03 0xe2 0xaa 0x00
> >   0x03 0xe1
> >   0x9e 0x67 0x00 0x08 0x8b 0x01 0x02 0x61 0xaa 0x13 0x03 0xe0 0x94 0x00
> >   0x01 0x60
> >   0x35 0xff 0xf9 0xe0 0xd1 0x00 0x07 0x95 0xd2 0x80 0x00 0x1b 0x9e 0x66
> >   0x01 0x01
> >   0x8b 0x15 0x02 0x60 0xcb 0x1c 0x00 0x17 0xaa 0x1b 0x03 0xf8 0x9e 0x67
> >   0x00 0x0a
> >   0xd2 0x80 0x00 0x20 0xcb 0x1c 0x00 0x00 0xcb 0x01 0x02 0x81 0x9e 0x67
> >   0x00 0x09
> >   0x9e 0x67 0x00 0x2b 0x8b 0x14 0x03 0x16 0x8b 0x1a 0x03 0x20 0x52 0x80
> >   0x00 0x01

The data appears to match, but the endian is different.

Regards,
Jan

> > 
> >   test child finished with -1
> >   ---- end ----
> >   Test object code reading: FAILED!
> > ######################################################################################
> > 
> > Seems the dso file format is different between x86 and ARM64.
> > Maybe this test case only works fine on x86.
> > --
> > Regards
> > Kaixu Xia
> > 
> 
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