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lammps/tools/valgrind/parse_valgrind_suppressions.sh
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parse_valgrind_suppressions.sh
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#! /usr/bin/awk -f
# A script to extract the actual suppression info from the output of (for example) valgrind --leak-check=full --show-reachable=yes --error-limit=no --gen-suppressions=all ./minimal
# The desired bits are between ^{ and ^} (including the braces themselves).
# The combined output should either be appended to /usr/lib/valgrind/default.supp, or placed in a .supp of its own
# If the latter, either tell valgrind about it each time with --suppressions=<filename>, or add that line to ~/.valgrindrc
# NB This script uses the |& operator, which I believe is gawk-specific. In case of failure, check that you're using gawk rather than some other awk
# The script looks for suppressions. When it finds one it stores it temporarily in an array,
# and also feeds it line by line to the external app 'md5sum' which generates a unique checksum for it.
# The checksum is used as an index in a different array. If an item with that index already exists the suppression must be a duplicate and is discarded.
BEGIN { suppression=0; md5sum = "md5sum"; count=0; prefix="gomp_supp"; }
# eat up all "insert suppression name here" labels
/[ ]*<.*>[ ]*$/ { next }
# If the line begins with '{', it's the start of a supression; so set the var and initialise things
/^{/ {
suppression=1; i=0; next
}
# If the line begins with '}' its the end of a suppression
/^}/ {
if (suppression)
{ suppression=0;
close(md5sum, "to") # We've finished sending data to md5sum, so close that part of the pipe
ProcessInput() # Do the slightly-complicated stuff in functions
delete supparray # We don't want subsequent suppressions to append to it!
}
}
# Otherwise, it's a normal line. If we're inside a supression, store it, and pipe it to md5sum. Otherwise it's cruft, so ignore it
{ if (suppression)
{
supparray[++i] = $0
print |& md5sum
}
}
function ProcessInput()
{
# Pipe the result from md5sum, then close it
md5sum |& getline result
close(md5sum)
# gawk can't cope with enormous ints like $result would be, so stringify it first by prefixing a definite string
resultstring = "prefix"result
if (! (resultstring in chksum_array) )
{ chksum_array[resultstring] = 0; # This checksum hasn't been seen before, so add it to the array
OutputSuppression() # and output the contents of the suppression
}
}
function OutputSuppression()
{
# A suppression is surrounded by '{' and '}'. Its data was stored line by line in the array
print "{"
++count;
printf " <%s_%06d> \n", prefix, count;
for (n=1; n <= i; ++n)
{ print supparray[n] }
print "}"
}
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