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tools perf: Fix compilation error with new binutils 

binutils changed the signature of init_disassemble_info(), which now causes
compilation failures for tools/perf/util/annotate.c, e.g. on debian
unstable.

Relevant binutils commit:

  https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07

Wire up the feature test and switch to init_disassemble_info_compat(),
which were introduced in prior commits, fixing the compilation failure.

I verified that perf can still disassemble bpf programs by using bpftrace
under load, recording a perf trace, and then annotating the bpf "function"
with and without the changes. With old binutils there's no change in output
before/after this patch. When comparing the output from old binutils (2.35)
to new bintuils with the patch (upstream snapshot) there are a few output
differences, but they are unrelated to this patch. An example hunk is:

       1.15 :   55:mov    %rbp,%rdx
       0.00 :   58:add    $0xfffffffffffffff8,%rdx
       0.00 :   5c:xor    %ecx,%ecx
  -    1.03 :   5e:callq  0xffffffffe12aca3c
  +    1.03 :   5e:call   0xffffffffe12aca3c
       0.00 :   63:xor    %eax,%eax
  -    2.18 :   65:leaveq
  -    2.82 :   66:retq
  +    2.18 :   65:leave
  +    2.82 :   66:ret

Signed-off-by: Andres Freund <andres@anarazel.de>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Ben Hutchings <benh@debian.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
Link: https://lore.kernel.org/r/20220801013834.156015-5-andres@anarazel.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andres Freund 2022-07-31 18:38:30 -07:00 committed by Arnaldo Carvalho de Melo
parent a45b3d6926
commit 83aa012048
2 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
tools/perf/Makefile.config
View File

@ -298,6 +298,7 @@ FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
FEATURE_CHECK_LDFLAGS-libaio = -lrt
FEATURE_CHECK_LDFLAGS-disassembler-four-args = -lbfd -lopcodes -ldl
FEATURE_CHECK_LDFLAGS-disassembler-init-styled = -lbfd -lopcodes -ldl
CORE_CFLAGS += -fno-omit-frame-pointer
CORE_CFLAGS += -ggdb3
@ -924,13 +925,16 @@ ifndef NO_LIBBFD
ifeq ($(feature-libbfd-liberty), 1)
EXTLIBS += -lbfd -lopcodes -liberty
FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -ldl
FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -ldl
else
ifeq ($(feature-libbfd-liberty-z), 1)
EXTLIBS += -lbfd -lopcodes -liberty -lz
FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -lz -ldl
FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -lz -ldl
endif
endif
$(call feature_check,disassembler-four-args)
$(call feature_check,disassembler-init-styled)
endif
ifeq ($(feature-libbfd-buildid), 1)
@ -1044,6 +1048,10 @@ ifeq ($(feature-disassembler-four-args), 1)
CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
endif
ifeq ($(feature-disassembler-init-styled), 1)
CFLAGS += -DDISASM_INIT_STYLED
endif
ifeq (${IS_64_BIT}, 1)
ifndef NO_PERF_READ_VDSO32
$(call feature_check,compile-32)

7
tools/perf/util/annotate.c
View File

@ -1720,6 +1720,7 @@ fallback:
#include <bpf/btf.h>
#include <bpf/libbpf.h>
#include <linux/btf.h>
#include <tools/dis-asm-compat.h>
static int symbol__disassemble_bpf(struct symbol *sym,
struct annotate_args *args)
@ -1762,9 +1763,9 @@ static int symbol__disassemble_bpf(struct symbol *sym,
ret = errno;
goto out;
}
init_disassemble_info(&info, s,
(fprintf_ftype) fprintf);
init_disassemble_info_compat(&info, s,
(fprintf_ftype) fprintf,
fprintf_styled);
info.arch = bfd_get_arch(bfdf);
info.mach = bfd_get_mach(bfdf);