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File vmbalance of Package ksh
#!/usr/bin/awk -f # # vmblance Awk script to detect endless growing memory alloctions # in endless shell loops using in daemonized shell scripts # # Usage: # # strace -s 128 -e execve,mmap,mmap2,munmap -o '|./vmbalance' ksh leak1.sh # BEGIN { FS="([[:blank:]]|[[:punct:]])" ignore="" script="" sum=0 allocs=0 frees=0 left=0 peak=0 } /^execve/ { if (FNR == 1) { script = gensub(/.*SOURCES\/([[:alnum:]_-]+\.sh).*/, "\\1", "g", $0) } } /^mmap(2|64)?\(/ { if ($0 !~ /.*MAP_PRIVATE\|MAP_ANONYMOUS.*/) { if (ignore) ignore=ignore "|" $NF else ignore=$NF } else { sum+=$4 allocs++ if (peak < sum) peak = sum } } /^munmap(2|64)?\(/ { if ($0 !~ ignore) { sum-=$4 frees++ } } END { left=allocs-frees print script ": " sum " bytes summed up, " peak " peak value, " left " chunks left over, " allocs " allocated, and " frees " freed" > "/dev/fd/3" }
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