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c65c83ffe9
So far we've been suppressing common stuff such as "MAP_" in the mmap
flags, showing "SHARED" instead of "MAP_SHARED", allow for those
prefixes (and a few suffixes) to be shown:
# trace -e *map,open*,*seek sleep 1
openat("/etc/ld.so.cache", CLOEXEC) = 3
mmap(0, 109093, READ, PRIVATE, 3, 0) = 0x7ff61c695000
openat("/lib64/libc.so.6", CLOEXEC) = 3
lseek(3, 792, SET) = 792
mmap(0, 8192, READ|WRITE, PRIVATE|ANONYMOUS) = 0x7ff61c693000
lseek(3, 792, SET) = 792
lseek(3, 864, SET) = 864
mmap(0, 1857568, READ, PRIVATE|DENYWRITE, 3, 0) = 0x7ff61c4cd000
mmap(0x7ff61c4ef000, 1363968, EXEC|READ, PRIVATE|FIXED|DENYWRITE, 3, 139264) = 0x7ff61c4ef000
mmap(0x7ff61c63c000, 311296, READ, PRIVATE|FIXED|DENYWRITE, 3, 1503232) = 0x7ff61c63c000
mmap(0x7ff61c689000, 24576, READ|WRITE, PRIVATE|FIXED|DENYWRITE, 3, 1814528) = 0x7ff61c689000
mmap(0x7ff61c68f000, 14368, READ|WRITE, PRIVATE|FIXED|ANONYMOUS) = 0x7ff61c68f000
munmap(0x7ff61c695000, 109093) = 0
openat("/usr/lib/locale/locale-archive", CLOEXEC) = 3
mmap(0, 217749968, READ, PRIVATE, 3, 0) = 0x7ff60f523000
#
# vim ~/.perfconfig
#
# perf config
llvm.dump-obj=true
trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o
trace.show_zeros=yes
trace.show_duration=no
trace.no_inherit=yes
trace.show_timestamp=no
trace.show_arg_names=no
trace.args_alignment=0
trace.string_quote="
trace.show_prefix=yes
#
#
# trace -e *map,open*,*seek sleep 1
openat(AT_FDCWD, "/etc/ld.so.cache", O_CLOEXEC) = 3
mmap(0, 109093, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7ebbe59000
openat(AT_FDCWD, "/lib64/libc.so.6", O_CLOEXEC) = 3
lseek(3, 792, SEEK_SET) = 792
mmap(0, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f7ebbe57000
lseek(3, 792, SEEK_SET) = 792
lseek(3, 864, SEEK_SET) = 864
mmap(0, 1857568, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebbc91000
mmap(0x7f7ebbcb3000, 1363968, PROT_EXEC|PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 139264) = 0x7f7ebbcb3000
mmap(0x7f7ebbe00000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1503232) = 0x7f7ebbe00000
mmap(0x7f7ebbe4d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1814528) = 0x7f7ebbe4d000
mmap(0x7f7ebbe53000, 14368, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS) = 0x7f7ebbe53000
munmap(0x7f7ebbe59000, 109093) = 0
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_CLOEXEC) = 3
mmap(0, 217749968, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7eaece7000
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-mtn1i4rjowjl72trtnbmvjd4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
// SPDX-License-Identifier: LGPL-2.1
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/*
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* trace/beauty/mount_flags.c
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*
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* Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include "trace/beauty/beauty.h"
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/log2.h>
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#include <sys/mount.h>
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static size_t mount__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
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{
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#include "trace/beauty/generated/mount_flags_array.c"
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static DEFINE_STRARRAY(mount_flags, "MS_");
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return strarray__scnprintf_flags(&strarray__mount_flags, bf, size, show_prefix, flags);
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}
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unsigned long syscall_arg__mask_val_mount_flags(struct syscall_arg *arg __maybe_unused, unsigned long flags)
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{
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// do_mount in fs/namespace.c:
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/*
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* Pre-0.97 versions of mount() didn't have a flags word. When the
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* flags word was introduced its top half was required to have the
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* magic value 0xC0ED, and this remained so until 2.4.0-test9.
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* Therefore, if this magic number is present, it carries no
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* information and must be discarded.
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*/
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if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
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flags &= ~MS_MGC_MSK;
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return flags;
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}
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size_t syscall_arg__scnprintf_mount_flags(char *bf, size_t size, struct syscall_arg *arg)
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{
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unsigned long flags = arg->val;
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return mount__scnprintf_flags(flags, bf, size, arg->show_string_prefix);
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}
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