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linux/tools/perf/util/intel-pt-decoder/Build

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perf tools: Rename build libperf to perf Rename build libperf to perf, because it's used to build perf. The libperf build object name will be used for libperf library. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190213123246.4015-4-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-02-13 13:32:39 +01:00
perf tools: Add Intel PT instruction decoder Add support for decoding instructions for Intel Processor Trace. The kernel x86 instruction decoder is copied for this. This essentially provides intel_pt_get_insn() which takes a binary buffer, uses the kernel's x86 instruction decoder to get details of the instruction and then categorizes it for consumption by an Intel PT decoder. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1439450095-30122-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-13 10:14:55 +03:00
perf intel-pt: Use shared x86 insn decoder Now that there's a common version of the decoder for all tools, use it instead of the local copy. Also use perf's check-headers.sh script to diff the decoder files to make sure they remain in sync with the kernel version. Objtool has a similar check. Committer notes: Had to keep this all pointing explicitely to x86 headers/files, i.e. instead of asm/isnn.h we had to use ../include/asm/insn.h when the files were in differemt dirs, or just replace "<asm/foo.h>" with "foo.h". This way we continue to be able to process perf.data files with Intel PT traces in distros other than x86. Also fixed up the awk script paths to use $(srcdir)/tools/arch instead or relative directories so that we keep detached tarballs (make help | grep perf) working. For now the include lines in these headers are being ignored so as not to flag false reports of kernel/tools out of sync. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: x86@kernel.org Link: http://lore.kernel.org/lkml/8a37e615d2880f039505d693d1e068a009358a2b.1567118001.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-29 17:41:21 -05:00
perf tools: Add Intel PT instruction decoder Add support for decoding instructions for Intel Processor Trace. The kernel x86 instruction decoder is copied for this. This essentially provides intel_pt_get_insn() which takes a binary buffer, uses the kernel's x86 instruction decoder to get details of the instruction and then categorizes it for consumption by an Intel PT decoder. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1439450095-30122-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-13 10:14:55 +03:00
perf build: Fix Intel PT instruction decoder dependency problem I hit following building error randomly: ... /bin/sh: /path/to/kernel/buildperf/util/intel-pt-decoder/inat-tables.c: No such file or directory ... LINK /path/to/kernel/buildperf/plugin_mac80211.so LINK /path/to/kernel/buildperf/plugin_kmem.so LINK /path/to/kernel/buildperf/plugin_xen.so LINK /path/to/kernel/buildperf/plugin_hrtimer.so In file included from util/intel-pt-decoder/intel-pt-insn-decoder.c:25:0: util/intel-pt-decoder/inat.c:24:25: fatal error: inat-tables.c: No such file or directory #include "inat-tables.c" ^ compilation terminated. make[4]: *** [/path/to/kernel/buildperf/util/intel-pt-decoder/intel-pt-insn-decoder.o] Error 1 make[4]: *** Waiting for unfinished jobs.... LINK /path/to/kernel/buildperf/plugin_function.so This is caused by tools/perf/util/intel-pt-decoder/Build that, it tries to generate $(OUTPUT)util/intel-pt-decoder/inat-tables.c atomatically but forget to ensure the existance of $(OUTPUT)util/intel-pt-decoder directory. This patch fixes it by adding $(call rule_mkdir) like other similar rules. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1441087005-107540-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-01 05:56:45 +00:00
perf tools: Add Intel PT instruction decoder Add support for decoding instructions for Intel Processor Trace. The kernel x86 instruction decoder is copied for this. This essentially provides intel_pt_get_insn() which takes a binary buffer, uses the kernel's x86 instruction decoder to get details of the instruction and then categorizes it for consumption by an Intel PT decoder. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1439450095-30122-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-13 10:14:55 +03:00
perf intel-pt-decoder: Avoid checking code drift on busibox's diff That doesn't have -I to match lines. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-7nz9hnbk7a9p91ou927ye5yh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-07-12 12:16:35 -03:00
perf intel-pt: Remove inat.c from build dependency list intel-pt-insn-decoder.c includes inat.c directly, so it already has an implicit dependency on inat.c. The Build file dependency is redundant. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: x86@kernel.org Link: http://lore.kernel.org/lkml/53776d6d29bc9eceb571d52df8fa32250c58a0f3.1567118001.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-29 17:41:20 -05:00
perf tools: Display build warning if x86 instruction decoder differs from kernel perf tools has a copy of the x86 instruction decoder used by the kernel. The expectation is that the copy will be kept more-or-less in-synch with the kernel version. Consequently it is helpful to know if there are differences. This patch adds a check into the perf tools build so that a diff is done on the sources, and a warning is printed if they are different. Note that the warning is not fatal and the build continues as normal. The check is done as part of building the instruction decoder, so, like a compiler warning, it is not seen unless the instruction decoder has to be re-compiled. e.g. $ make -C tools/perf >/dev/null $ echo "/* blah */" >> tools/perf/util/intel-pt-decoder/inat_types.h $ make -C tools/perf >/dev/null Warning: Intel PT: x86 instruction decoder differs from kernel $ make -C tools/perf >/dev/null $ Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qiaowei Ren <qiaowei.ren@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1441196131-20632-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-02 15:15:25 +03:00
perf tools: Add Intel PT instruction decoder Add support for decoding instructions for Intel Processor Trace. The kernel x86 instruction decoder is copied for this. This essentially provides intel_pt_get_insn() which takes a binary buffer, uses the kernel's x86 instruction decoder to get details of the instruction and then categorizes it for consumption by an Intel PT decoder. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1439450095-30122-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-13 10:14:55 +03:00
perf intel pt decoder: clang has no -Wno-override-init So set it only for other compilers, allowing us to overcome yet another build failure due to an inexistent clang -W option: error: unknown warning option '-Wno-override-init'; did you mean '-Wno-override-module'? [-Werror,-Wunknown-warning-option] Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-oaa1ici3j8nygp4pzl2oobh3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-14 16:18:02 -03:00
perf tools: Robustify detection of clang binary Prior to this patch, make scripts tested for CLANG with ifeq ($(CC), clang), failing to detect CLANG binaries with different names. Fix it by testing for the existence of __clang__ macro in the list of compiler defined macros. Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Paul Turner <pjt@google.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20170827075442.108534-5-davidcc@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-27 00:54:40 -07:00
perf intel pt decoder: clang has no -Wno-override-init So set it only for other compilers, allowing us to overcome yet another build failure due to an inexistent clang -W option: error: unknown warning option '-Wno-override-init'; did you mean '-Wno-override-module'? [-Werror,-Wunknown-warning-option] Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-oaa1ici3j8nygp4pzl2oobh3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-14 16:18:02 -03:00
x86/insn: Use get_unaligned() instead of memcpy() Use get_unaligned() instead of memcpy() to access potentially unaligned memory, which, when accessed through a pointer, leads to undefined behavior. get_unaligned() describes much better what is happening there anyway even if memcpy() does the job. In addition, since perf tool builds with -Werror, it would fire with: util/intel-pt-decoder/../../../arch/x86/lib/insn.c: In function '__insn_get_emulate_prefix': tools/include/../include/asm-generic/unaligned.h:10:15: error: packed attribute is unnecessary [-Werror=packed] 10 | const struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr); \ because -Werror=packed would complain if the packed attribute would have no effect on the layout of the structure. In this case, that is intentional so disable the warning only for that compilation unit. That part is Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> No functional changes. Fixes: 5ba1071f7554 ("x86/insn, tools/x86: Fix undefined behavior due to potential unaligned accesses") Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Link: https://lkml.kernel.org/r/YVSsIkj9Z29TyUjE@zn.tnic
2021-09-29 16:37:53 +02:00