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Mini Shell
Mini Shell
#!/usr/bin/stap
# Copyright (C) 2018 Red Hat, Inc.
# Written by William Cohen <wcohen@redhat.com>
#
# Provide concise plottable information about phases 0-4 of systemtap
global start, pass0, pass1, pass2, pass3, pass4
function print_head() {printf("")}
function print_tail() {printf("")}
probe begin { print_head() }
probe end { print_tail() }
probe stap.pass0 { start[session] = gettimeofday_ms() }
probe stap.pass0.end { pass0[session] = gettimeofday_ms() }
probe stap.pass1.end { pass1[session] = gettimeofday_ms() }
probe stap.pass2.end { pass2[session] = gettimeofday_ms() }
probe stap.pass3.end { pass3[session] = gettimeofday_ms() }
probe stap.pass4.end {
pass4[session] = gettimeofday_ms()
// Dig through C++ string private fields to find the systemtap script name
cmdline_script = @cast(session, "struct systemtap_session")->cmdline_script->_M_string_length
if (cmdline_script) {
script = "<cmdline_script>"
} else {
len = @cast(session, "struct systemtap_session")->script_file->_M_string_length
if (len <= 15) {
script_file = @cast(session, "struct systemtap_session")->script_file->_M_local_buf
} else {
script_file = @cast(session, "struct systemtap_session")->script_file->_M_dataplus->_M_p
}
script = user_string2(script_file, "<unavailable>")
}
// print out data
printf("%s %d %d %d %d %d\n",
script,
pass0[session] - start[session],
pass1[session] - pass0[session],
pass2[session] - pass1[session],
pass3[session] - pass2[session],
pass4[session] - pass3[session])
// delete entries
delete pass0[session]
delete pass1[session]
delete pass2[session]
delete pass3[session]
delete pass4[session]
}
Zerion Mini Shell 1.0