Em Thu, Oct 13, 2016 at 04:03:11PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Oct 13, 2016 at 03:51:35PM -0300, Arnaldo Carvalho de Melo escreveu:
> > So we need:
> >
> > [acme@jouet linux]$ git diff
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index 8cfc310d4358..cffdd9cf3ebf 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -366,8 +366,10 @@ ifndef NO_SDT
> > endif
> >
> > ifdef PERF_HAVE_JITDUMP
> > + ifndef NO_LIBELF
> > $(call detected,CONFIG_JITDUMP)
> > CFLAGS += -DHAVE_JITDUMP
> > + endif
> > endif
> >
> > ifeq ($(ARCH),powerpc)
> > [acme@jouet linux]$
> >
> > To get that fixed.
> >
> > Please let me know if this suits your needs.
> >
> > I'll now try building with elfutils static libraries to see if in that case
> > it
> > all gets linked.
>
> After installing these packages, on fedora, i.e. installing what is
> needed to statically link against libelf:
>
> elfutils-devel-static
> elfutils-libelf-devel-static
> zlib-static
>
> Then it all works, libelf is statically linked and we also statically
> link the jitdump code:
>
> $ make -C tools/perf LDFLAGS=-static O=/tmp/build/perf install-bin
> $ grep libelf /tmp/build/perf/FEATURE-DUMP
> feature-libelf=1
> feature-libelf-getphdrnum=1
> feature-libelf-gelf_getnote=1
> feature-libelf-getshdrstrndx=1
> feature-libelf-mmap=1
> $
>
> And:
>
> [acme@jouet linux]$ size /tmp/build/perf/perf
> text data bss dec hex filename
> 4478822 581702 23919240 28979764 1ba3234
> /tmp/build/perf/perf
> [acme@jouet linux]$
> [acme@jouet linux]$ file /tmp/build/perf/perf
> /tmp/build/perf/perf: ELF 64-bit LSB executable, x86-64, version 1
> (GNU/Linux), statically linked, for GNU/Linux 2.6.32,
> BuildID[sha1]=c2950590a0f24d76baa0ce4896414e5d523fefba, not stripped
> [acme@jouet linux]$
> [acme@jouet linux]$ nm /tmp/build/perf/perf | grep jit
> 00000000005007f0 T jit_process
> 0000000000501920 T jit_write_elf
> 0000000000431a50 t perf_event__jit_repipe_mmap
> 0000000000431b20 t perf_event__jit_repipe_mmap2
> [acme@jouet linux]$
Ok, now this cset is bisected as causing this problem when built on Alpine
Linux 3.4:
CC /tmp/build/perf/util/demangle-java.o
CC /tmp/build/perf/util/demangle-rust.o
CC /tmp/build/perf/util/jitdump.o
CC /tmp/build/perf/util/genelf.o
util/jitdump.c: In function 'jit_process':
util/jitdump.c:622:3: error: 'ret' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
fprintf(stderr, "injected: %s (%d)\n", path, ret);
^
util/jitdump.c:584:6: note: 'ret' was declared here
int ret;
^
FLEX /tmp/build/perf/util/parse-events-flex.c
/ $ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-alpine-linux-musl/5.3.0/lto-wrapper
Target: x86_64-alpine-linux-musl
Configured with: /home/buildozer/aports/main/gcc/src/gcc-5.3.0/configure
--prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info
--build=x86_64-alpine-linux-musl --host=x86_64-alpine-linux-musl
--target=x86_64-alpine-linux-musl --with-pkgversion='Alpine 5.3.0'
--enable-checking=release --disable-fixed-point --disable-libstdcxx-pch
--disable-multilib --disable-nls --disable-werror --disable-symvers
--enable-__cxa_atexit --enable-esp --enable-cloog-backend
--enable-languages=c,c++,objc,java,fortran,ada --disable-libssp
--disable-libmudflap --disable-libsanitizer --enable-shared --enable-threads
--enable-tls --with-system-zlib
Thread model: posix
gcc version 5.3.0 (Alpine 5.3.0)
/ $
Investigating...
- Arnaldo
