/usr/share/systemtap/tapset/java.stp is in systemtap-common 2.6-0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | global java_backtrace_string
/**
* sfunction sprint_java_backtrace - returns the java backtrace as a single string
*
* Description: This function returns the java backtrace as a single string.
* in the case when the backtrace is cut off, use the -DMAXSTRINGLEN
* option to extend the maximum string length
*/
function sprint_java_backtrace:string ()
{
foreach([_tid,__thread_depth+] in java_backtrace_string){
if(_tid == tid()){
string_return .= java_backtrace_string[_tid,__thread_depth]
string_return .= "\n"
}
}
return string_return
}
/**
* sfunction print_java_backtrace - print the java backtrace
*
* Description: This function immediately prints the java backtrace
* one line at a time, avoiding any max string length issues.
*
*/
function print_java_backtrace ()
{
foreach ([_tid,__thread_depth+] in java_backtrace_string){
if(_tid == tid()){
println(java_backtrace_string[_tid,__thread_depth])
}
}
}
function __delete_backtrace()
{
foreach([_tid,_depth-] in java_backtrace_string){
if(_tid == tid() && _depth > jbs_dup){
jbs_dup = _depth
}
}
for (i = 0; i< jbs_dup; i++)
delete java_backtrace_string[_tid, i]
delete jbs_dup
}
function __assign_stacktrace(jbts:long, jstd:long){
java_backtrace_string[tid(), jstd] = user_string(jbts)
}
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