kernel.git/tools/perf/arch/x86, branch linux-4.18.y

perf tools: Fix the build on the alpine:edge distro

2018-07-30T16:15:03Z

The UAPI file byteorder/little_endian.h uses the __always_inline define without including the header where it is defined, linux/stddef.h, this ends up working in all the other distros because that file gets included seemingly by luck from one of the files included from little_endian.h. But not on Alpine:edge, that fails for all files where perf_event.h is included but linux/stddef.h isn't include before that. Adding the missing linux/stddef.h file where it breaks on Alpine:edge to fix that, in all other distros, that is just a very small header anyway. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-9r1pifftxvuxms8l7ir73p5l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix compilation errors on gcc8

2018-07-11T13:39:57Z

We are getting following warnings on gcc8 that break compilation: $ make CC jvmti/jvmti_agent.o jvmti/jvmti_agent.c: In function ‘jvmti_open’: jvmti/jvmti_agent.c:252:35: error: ‘/jit-’ directive output may be truncated \ writing 5 bytes into a region of size between 1 and 4096 [-Werror=format-truncation=] snprintf(dump_path, PATH_MAX, "%s/jit-%i.dump", jit_path, getpid()); There's no point in checking the result of snprintf call in jvmti_open, the following open call will fail in case the name is mangled or too long. Using tools/lib/ function scnprintf that touches the return value from the snprintf() calls and thus get rid of those warnings. $ make DEBUG=1 CC arch/x86/util/perf_regs.o arch/x86/util/perf_regs.c: In function ‘arch_sdt_arg_parse_op’: arch/x86/util/perf_regs.c:229:4: error: ‘strncpy’ output truncated before terminating nul copying 2 bytes from a string of the same length [-Werror=stringop-truncation] strncpy(prefix, "+0", 2); ^~~~~~~~~~~~~~~~~~~~~~~~ Using scnprintf instead of the strncpy (which we know is safe in here) to get rid of that warning. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20180702134202.17745-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Update x86's syscall_64.tbl, adding 'io_pgetevents' and 'rseq'

2018-06-25T14:59:36Z

This updates the tools/perf/ copy of the system call table for x86 which makes 'perf trace' become aware of the new 'io_pgetevents' and 'rseq' syscalls, no matter in which system it gets built, i.e. older systems where the syscalls are not available in the running kernel (via tracefs) or in the system headers will still be aware of these syscalls/. These are the csets introducing the source drift: 05c17cedf85b ("x86: Wire up restartable sequence system call") 7a074e96dee6 ("aio: implement io_pgetevents") This results in this build time change: $ diff -u /tmp/build/perf/arch/x86/include/generated/asm/syscalls_64.c.old /tmp/build/perf/arch/x86/include/generated/asm/syscalls_64.c --- /tmp/build/perf/arch/x86/include/generated/asm/syscalls_64.c.old 2018-06-15 11:48:17.648948094 -0300 +++ /tmp/build/perf/arch/x86/include/generated/asm/syscalls_64.c 2018-06-15 11:48:22.133942480 -0300 @@ -332,5 +332,7 @@ [330] = "pkey_alloc", [331] = "pkey_free", [332] = "statx", + [333] = "io_pgetevents", + [334] = "rseq", }; -#define SYSCALLTBL_x86_64_MAX_ID 332 +#define SYSCALLTBL_x86_64_MAX_ID 334 $ This silences the following tools/perf/ build warning: Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl' Cc: Adrian Hunter Cc: Christoph Hellwig Cc: David Ahern Cc: Jiri Olsa Cc: Mathieu Desnoyers Cc: Namhyung Kim Cc: Thomas Gleixner Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-tfvyz51sabuzemrszbrhzxni@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Synthesize and process mmap events for x86 PTI entry trampolines

2018-05-23T13:26:39Z

Like the kernel text, the location of x86 PTI entry trampolines must be recorded in the perf.data file. Like the kernel, synthesize a mmap event for that, and add processing for it. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andy Lutomirski Cc: Dave Hansen Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Joerg Roedel Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1526986485-6562-10-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Create maps for x86 PTI entry trampolines

2018-05-23T13:24:08Z

Create maps for x86 PTI entry trampolines, based on symbols found in kallsyms. It is also necessary to keep track of whether the trampolines have been mapped particularly when the kernel dso is kcore. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andy Lutomirski Cc: Dave Hansen Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Joerg Roedel Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1526986485-6562-9-git-send-email-adrian.hunter@intel.com [ Fix extra_kernel_map_info.cnt designed struct initializer on gcc 4.4.7 (centos:6, etc) ] Signed-off-by: Arnaldo Carvalho de Melo

perf map: Remove map_type arg from map_groups__find()

2018-04-26T16:47:18Z

One more step in ditching the split. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-4pour7egur07tkrpbynawemv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf map: Shorten map_groups__find() signature

2018-04-26T16:47:12Z

Removing the map_type, that is going away. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-18iiiw25r75xn7zlppjldk48@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools/headers: Synchronize kernel ABI headers, v4.17-rc1

2018-04-17T12:47:39Z

Sync the following tooling headers with the latest kernel version: tools/arch/arm/include/uapi/asm/kvm.h - New ABI: KVM_REG_ARM_* tools/arch/x86/include/asm/required-features.h - Removal of NEED_LA57 dependency tools/arch/x86/include/uapi/asm/kvm.h - New KVM ABI: KVM_SYNC_X86_* tools/include/uapi/asm-generic/mman-common.h - New ABI: MAP_FIXED_NOREPLACE flag tools/include/uapi/linux/bpf.h - New ABI: BPF_F_SEQ_NUMBER functions tools/include/uapi/linux/if_link.h - New ABI: IFLA tun and rmnet support tools/include/uapi/linux/kvm.h - New ABI: hyperv eventfd and CONN_ID_MASK support plus header cleanups tools/include/uapi/sound/asound.h - New ABI: SNDRV_PCM_FORMAT_FIRST PCM format specifier tools/perf/arch/x86/entry/syscalls/syscall_64.tbl - The x86 system call table description changed due to the ptregs changes and the renames, in: d5a00528b58c: syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*() 5ac9efa3c50d: syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention ebeb8c82ffaf: syscalls/x86: Use 'struct pt_regs' based syscall calling for IA32_EMULATION and x32 Also fix the x86 syscall table warning: -Warning: Kernel ABI header at 'tools/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl' +Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl' None of these changes impact existing tooling code, so we only have to copy the kernel version. Signed-off-by: Ingo Molnar Cc: Adrian Hunter Cc: Alexander Potapenko Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Alexey Budankov Cc: Andi Kleen Cc: Andrey Ryabinin Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Brian Robbins Cc: Clark Williams Cc: Daniel Borkmann Cc: David Ahern Cc: Dmitriy Vyukov Cc: Heiko Carstens Cc: Hendrik Brueckner Cc: Jesper Dangaard Brouer Cc: Jin Yao Cc: Jiri Olsa Cc: Josh Poimboeuf Cc: Kan Liang Cc: Kim Phillips Cc: Linus Torvalds Cc: Li Zhijian Cc: Mark Rutland Cc: Martin Liška Cc: Martin Schwidefsky Cc: Matthias Kaehlcke Cc: Miguel Bernal Marin Cc: Namhyung Kim Cc: Naveen N. Rao Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Stephane Eranian Cc: Stephen Rothwell Cc: Takuya Yamamoto Cc: Thomas Gleixner Cc: Thomas Richter Cc: Wang Nan Cc: William Cohen Cc: Yonghong Song Link: http://lkml.kernel.org/r/20180416064024.ofjtrz5yuu3ykhvl@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf annotate: Handle variables in 'sub', 'or' and many other instructions

2018-04-13T13:00:05Z

Just like is done for 'mov' and others that can have as source or targets variables resolved by objdump, to make them more compact: - orb $0x4,0x224d71(%rip) # 226ca4 <_rtld_global+0xca4> + orb $0x4,_rtld_global+0xca4 Cc: Adrian Hunter Cc: Andi Kleen Cc: David Ahern Cc: Jin Yao Cc: Jiri Olsa Cc: Martin Liška Cc: Namhyung Kim Cc: Ravi Bangoria Cc: Thomas Richter Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-efex7746id4w4wa03nqxvh3m@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt/bts: In auxtrace_record__init_intel() evlist is never NULL

2018-03-08T13:05:56Z

Tidy auxtrace_record__init_intel() slightly by recognizing that evlist is never NULL. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1520431349-30689-6-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo