#!/bin/sh

##
## @test TooSmallStackSize.sh
## @bug 6762191
## @summary Setting stack size to 16K causes segmentation fault 
## @run shell TooSmallStackSize.sh
##
## some tests require path to find test source dir
if [ "${TESTSRC}" = "" ]
then
  TESTSRC=${PWD}
  echo "TESTSRC not set.  Using "${TESTSRC}" as default"
fi
echo "TESTSRC=${TESTSRC}"
## Adding common setup Variables for running shell tests.
. ${TESTSRC}/../../test_env.sh

JAVA=${TESTJAVA}${FS}bin${FS}java

# Current directory is scratch directory, copy all the test source there
# (for the subsequent moves to work).
${CP} ${TESTSRC}${FS}/TooSmallStackSize.sh ${THIS_DIR}

# Run java with 16k stack size, which caused a crash on some platforms
${JAVA} ${TESTOPTS} -Xss16k -version >test.out 2>&1
result=$?
cat test.out

# The result of a 16k stack size should be a quick exit with a complaint
# that the stack size is too small. However, for some win32 builds, the
# stack is always at least 64k, and this also sometimes is the minimum
# allowed size, so we won't see an error in this case.
if [ "$result" != "0" ]; then
  grep "The stack size specified is too small" test.out
  if [ "$?" != "0" ]; then
    printf "FAILED #1: Did not get expected error message with stack size of 16k\n"
    exit 1
  fi
  printf "PASSED #1: got expected error message with stack size of 16k\n"
else
  printf "PASSED #1: got no error message with stack size of 16k\n"
fi

# Now try again with a 32k stack size, which is the size that the launcher will
# set to if you try setting to anything smaller. This should produce the same 
# result as setting to 16k.
${JAVA} ${TESTOPTS} -Xss32k -version >test.out 2>&1
result=$?
cat test.out

# The result of a 32k stack size should again be a quick exit with a complaint
# that the stack size is too small. Once again, this might not fail on win32.
if [ "$result" != "0" ]; then
  grep "The stack size specified is too small" test.out
  if [ "$?" != "0" ]; then
    printf "FAILED #2: Did not get expected error message with stack size of 32k\n"
    exit 1
  fi
  printf "PASSED #2: got expected error message with stack size of 32k\n"
  # Error message contains the minimum stack size allowed. 
  min_stack_allowed=`grep Specify.at.least test.out | sed -e 's/.*Specify at least \(.*k\).*/\1/g'`
else
  printf "PASSED #2: got no error message with stack size of 32k\n"
  # No error message, so just use the same size again on the next run.
  min_stack_allowed="32k"
fi

# Try again with a the minimum stack size that was given in the error message
${JAVA} ${TESTOPTS} -Xss${min_stack_allowed} -version >test.out 2>&1
result=$?
cat test.out

# The result should be success running java -version.
if [ "$result" != "0" ]; then
  printf "FAILED #3: VM failed to launch with minimum allowed stack size of %dk\n" $min_stack_allowed
  exit 1
else
  printf "PASSED #3: VM launched with minimum allowed stack size of %dk\n" $min_stack_allowed
fi

printf "PASSED.\n"