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From: Robert Richter on 7 May 2010 12:40
On 15.04.10 07:29:18, tip-bot for Masami Hiramatsu wrote:
> diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
> index 2a27132..310ce89 100644
> --- a/tools/perf/util/probe-finder.h
> +++ b/tools/perf/util/probe-finder.h
> @@ -42,6 +42,7 @@ struct probe_finder {
> struct list_head lcache; /* Line cache for lazy match */
>
> /* For variable searching */
> + Dwarf_CFI *cfi; /* Call Frame Information */

I get the following complile error:

gcc -o builtin-probe.o -c -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Wformat-y2k -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fstack-protector-all -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Iutil/include -I/usr/include/elfutils -DDWARF_SUPPORT -DNO_NEWT_SUPPORT -DNO_LIBPERL -DSHA1_HEADER='<openssl/sha.h>' builtin-probe.c
In file included from builtin-probe.c:43:
util/probe-finder.h:45: error: expected specifier-qualifier-list before 'Dwarf_CFI'
make: *** [builtin-probe.o] Error 1
build script error: 2

git grep only finds the following:

$ git grep Dwarf_CFI
tools/perf/util/probe-finder.h: Dwarf_CFI *cfi; /* Call Frame Information */

Am I missing something?

-Robert

> Dwarf_Op *fb_ops; /* Frame base attribute */
> struct perf_probe_arg *pvar; /* Current target variable */
> struct kprobe_trace_arg *tvar; /* Current result variable */

--
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter(a)amd.com

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From: Robert Richter on 7 May 2010 16:10
On 07.05.10 15:47:57, Masami Hiramatsu wrote:
> > Agreed. I'll check that what version can support current perf probe.
>
> OK, I've found that the CFI support has been added at last June,
> and elfutils-0.142 is released in last July.

Yes, that's the problem, I am using elfutils-0.131-r2.

> So, I think we can check whether CFI is supported or not by checking
> the version of elfutils, which can be done by _ELFUTILS_PREREQ() macro
> defined in elfutils/version.h

Looking forward to your fix.

Thanks,

-Robert

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Operating System Research Center
email: robert.richter(a)amd.com

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