관리-도구

편집 파일: last_100_frees.stp

#!/usr/bin/stap global bt%[100] probe process("/lib*/libc.so.*").function("free") { // we use @defined($mem) here because on 64 bit systems, the // wildcard search takes us through both 64 bit and 32 bit // libc (which doesn't have debuginfo), this means the probe // point resolved from the 32 bit library has no context info if (@defined($mem)) { bt[execname(),tid(),$mem,sprint_ubacktrace()] <<< local_clock_ns() } // Any monotonically increasing expression would do. // With some arbitrary expression or constant instead, // at worst we get the last 100ish results out of order. } probe end,error { foreach ([e,t,p,b] in bt @max+) // iterate in increasing index order printf("free #%d: %s[%d], pointer %p:\n%s\n\n", @max(bt[e,t,p,b]), e, t, p, b) }