AuxXxilium/linux_dsm_epyc7002
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83bc9c371e
linux_dsm_epyc7002/tools
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Arnaldo Carvalho de Melo 83bc9c371e perf trace beauty: Beautify pkey_{alloc,free,mprotect} arguments 
Reuse 'mprotect' beautifiers for 'pkey_mprotect'.

System wide tracing pkey_alloc, pkey_free and pkey_mprotect calls, with
backtraces:

  # perf trace -e pkey_alloc,pkey_mprotect,pkey_free --max-stack=5
     0.000 ( 0.011 ms): pkey/7818 pkey_alloc(init_val: DISABLE_ACCESS|DISABLE_WRITE) = -1 EINVAL Invalid argument
                                       syscall (/usr/lib64/libc-2.25.so)
                                       pkey_alloc (/home/acme/c/pkey)
     0.022 ( 0.003 ms): pkey/7818 pkey_mprotect(start: 0x7f28c3890000, len: 4096, prot: READ|WRITE, pkey: -1) = 0
                                       syscall (/usr/lib64/libc-2.25.so)
                                       pkey_mprotect (/home/acme/c/pkey)
     0.030 ( 0.002 ms): pkey/7818 pkey_free(pkey: -1                               ) = -1 EINVAL Invalid argument
                                       syscall (/usr/lib64/libc-2.25.so)
                                       pkey_free (/home/acme/c/pkey)

The tools/include/uapi/asm-generic/mman-common.h file is used to find
the access rights defines for the pkey_alloc syscall second argument.

Since we have the detector of changes for the tools/include header files
versus its kernel origin (include/uapi/asm-generic/mman-common.h), we'll
get whatever new flag appears for that argument automatically.

This method should be used in other cases where it is easy to generate
those flags tables because the header has properly namespaced defines
like PKEY_DISABLE_ACCESS and PKEY_DISABLE_WRITE.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.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-3xq5312qlks7wtfzv2sk3nct@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-28 16:44:47 -03:00
..
accounting
arch tools headers: Sync cpu features kernel ABI headers with tooling headers 2017-08-28 16:44:46 -03:00
build tools build tests: Don't hardcode gcc name 2017-08-28 16:44:44 -03:00
cgroup
firewire
gpio
hv
iio
include perf tools: Add support for printing new mem_info encodings 2017-08-22 12:30:25 -03:00
kvm/kvm_stat tools/kvm_stat: add '-f help' to get the available event list 2017-07-26 19:04:53 +02:00
laptop
leds
lguest
lib perf tools: Robustify detection of clang binary 2017-08-28 16:44:46 -03:00
net
nfsd
objtool
pci
pcmcia
perf perf trace beauty: Beautify pkey_{alloc,free,mprotect} arguments 2017-08-28 16:44:47 -03:00
power
scripts perf tools: Robustify detection of clang binary 2017-08-28 16:44:46 -03:00
spi
testing test_kmod: fix description for -s -and -c parameters 2017-08-18 15:32:01 -07:00
thermal/tmon
time
usb
virtio
vm
Makefile