hphp/hhvm/thread_locals_test.sh

   1 #!/bin/bash
   2
   3 # Test input arguments:
   4 #   $1 is path to the HHVM binary.
   5 #   $2 is the path to thread_locals.txt.
   6
   7 # We use `nm` to list symbols, filter to thread locals in the HPHP:: namespace,
   8 # use cut to select just the name, then strip trailing whitespace and ABI tags.
   9 ALL=$( \
  10   nm --demangle --format sysv "$1" \
  11   | grep 'HPHP::' \
  12   | grep -v 'HPHP::HHBBC::' \
  13   | grep '\(\.tbss\|\.tdata\)' \
  14   | cut --delimiter '|' --field 1 \
  15   | sed -e 's/ *$//' \
  16   | sed -e 's/\[abi:[^]]*\]$//' \
  17 )
  18
  19 # Remove bash-style comments from the whitelist file.
  20 WHITELIST=$(sed -e 's/ *#.*//' "$2")
  21
  22 # comm -23 returns lines in the first input that are not in the second.
  23 # We need -u becaues a symbol may appear multiple times with different ABI tags.
  24 EXTRA=$(comm -23 <(echo "$ALL" | sort -u) <(echo "$WHITELIST" | sort -u))
  25
  26 if [ "$EXTRA" ]; then
  27   echo -e "
  28 --------------------------------------------------------------------------------
  29 \\e[0;31mERROR: New thread locals detected.\\e[0m
  30 Per-request memory should be allocated using RDS locals to allow for
  31 userland scheduling. New thread locals indicate a  potential logic error.
  32 If these thread locals are necessary, add them to thread_locals.txt:
  33
  34 $EXTRA
  35 --------------------------------------------------------------------------------
  36   "
  37   exit 1
  38 fi