diff options
Diffstat (limited to 'gcc-4.7/contrib/reghunt/bin/reg-hunt')
-rwxr-xr-x | gcc-4.7/contrib/reghunt/bin/reg-hunt | 363 |
1 files changed, 0 insertions, 363 deletions
diff --git a/gcc-4.7/contrib/reghunt/bin/reg-hunt b/gcc-4.7/contrib/reghunt/bin/reg-hunt deleted file mode 100755 index aa0ea61ee..000000000 --- a/gcc-4.7/contrib/reghunt/bin/reg-hunt +++ /dev/null @@ -1,363 +0,0 @@ -#! /bin/bash - -#set -x - -######################################################################## -# -# File: reg-hunt -# Author: Janis Johnson <janis187@us.ibm.com> -# Date: 2003/08/19 -# -# Search for the patch identifier for which results for a test changed, -# using a binary search. The functionality for getting sources, -# building the component to test, and running the test are in other -# scripts that are run from here. Before the search begins, we verify -# that we get the expected behavior for the first and last patch -# identifiers. -# -# Define these in a file whose name is the argument to this script: -# LOW_PATCH: Patch identifier. -# HIGH_PATCH: Patch identifier. -# REG_UPDATE: Pathname of script to update your source tree; returns -# zero for success, nonzero for failure. -# REG_BUILD: Pathname of script to build enough of the product to run -# the test; returns zero for success, nonzero for failure. -# REG_TEST: Pathname of script to run the test; returns 1 if we -# should search later patches, 0 if we should search -# earlier patches, and something else if there was an -# unexpected failure. -# Optional: -# REG_REPORT Pathname of script to call at the end with the id of the -# patch that caused the change in behavior. -# REG_FINISH Pathname of script to call at the end with the two final -# patch identifiers as arguments. -# REG_NEWMID Pathname of script to call when a build has failed, with -# arguments of the failed id and the current low and high -# SKIP_LOW If 1, skip verifying the low patch identifier of the -# range; define this only if you're restarting and have -# already tested the low patch. -# SKIP_HIGH If 1, skip verifying the high patch identifier of the -# range; define this only if you're restarting and have -# already tested the high patch. -# FIRST_MID Use this as the first midpoint, to avoid a midpoint that -# is known not to build. -# VERBOSITY Default is 0, to print only errors and final message. -# DATE_IN_MSG If set to anything but 0, include the time and date in -# messages. -# -# -# -# Copyright (c) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. -# -# This file is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# For a copy of the GNU General Public License, write the the -# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, -# Boston, MA 02111-1301, USA. -# -######################################################################## - -######################################################################## -# Functions -######################################################################## - -# Issue a message if its verbosity level is high enough. - -msg() { - test ${1} -gt ${VERBOSITY} && return - - if [ "x${DATE_IN_MSG}" = "x" ]; then - echo "${2}" - else - echo "`date` ${2}" - fi -} - -# Issue an error message and exit with a non-zero status. If there -# is a valid current range whose end points have been tested, report -# it so the user can start again from there. - -error() { - msg 0 "error: ${1}" - test ${VALID_RANGE} -eq 1 && \ - echo "current range:" - echo "LOW_PATCH=${LATER_THAN}" - echo "HIGH_PATCH=${EARLIER_THAN}" - exit 1 -} - -# Build the components to test using sources as of a particular patch -# and run a test case. Pass each of the scripts the patch identifier -# that we're testing; the first one needs it, the others can ignore it -# if they want. - -process_patch () { - TEST_ID=${1} - - # If we're keeping track of known failures, see if TEST_ID is one and - # if so, don't bother updating sources and trying to build. - - FAILS=0 - SKIP=0 - if [ ${SKIP_FAILURES} -eq 1 ]; then - ${REG_CHECKFAIL} ${TEST_ID} - if [ $? -eq 0 ]; then - msg 1 "skipping ${TEST_ID}; it is a known build failure" - FAILS=1 - SKIP=1 - fi - fi - - if [ ${FAILS} -eq 0 ]; then - ${REG_UPDATE} ${TEST_ID} || error "source update failed for ${TEST_ID}" - ${REG_BUILD} ${TEST_ID} - if [ $? -ne 0 ]; then - FAILS=1 - msg 1 "build failed for ${TEST_ID}" - if [ ${SKIP_FAILURES} -eq 1 ]; then - ${REG_RECORDFAIL} ${TEST_ID} - fi - fi - fi - - if [ ${FAILS} -eq 0 ]; then - ${REG_TEST} ${TEST_ID} - LATER=$? - if [ $LATER -ne 0 -a $LATER -ne 1 ]; then - msg 0 "unexpected test failure for ${TEST_ID}" - exit 1 - fi - else - - # The build failed, or this patch is already known to fail to build. - # If it's an endpoint, or if we don't have a way to recover from - # build failures, quit now. - - if [ ${SKIP} -eq 0 ]; then - if [ "x${REG_NEWMID}" == "x" \ - -o ${TEST_ID} -eq ${LATER_THAN} \ - -o ${TEST_ID} -eq ${EARLIER_THAN} ]; then - error "build failed for ${TEST_ID}" - fi - fi - - # Try to find a new patch to try within the current range. - - FIRST_MID=`${REG_NEWMID} ${LATER_THAN} ${EARLIER_THAN}` - if [ ${FIRST_MID} -eq 0 ]; then - - # The heuristics in the tool ran out of patches to try next; - # let the user handle it from here.+ - error "build failed for ${TEST_ID}, could not find new candidate" - fi - msg 1 "using ${FIRST_MID}, between ${LATER_THAN} and ${EARLIER_THAN}" - fi - - # Return with a valid LATER value or a new ID to try in FIRST_MID. -} - -# Get the number of a patch within the range. It's not actually the -# middle one, but the one that might minimize the number of checks. - -get_mid_special() { - LOW=$1 - HIGH=$2 - - let DIFF=HIGH-LOW - M=1 - POWER2=1 - while - [ $POWER2 -lt $DIFF ] - do - let M=POWER2 - let POWER2=POWER2*2 - done - let MID=LOW+M -} - -# Get the number of the patch in the middle of the range. - -get_mid () { - LOW=$1 - HIGH=$2 - - let DIFF=HIGH-LOW - let M=DIFF/2 - let MID=LOW+M -} - -# Perform a binary search on patch identifiers within the range -# specified by the arguments. - -search_patches () { - LOW=$1 - HIGH=$2 - - # Get an identifier within the range. The user can override the - # initial mid patch if it is known to have problems, e.g., if a - # build fails for that patch. - - if [ ${FIRST_MID} -ne 0 ]; then - MID=${FIRST_MID} - FIRST_MID=0 - let DIFF=HIGH-LOW - else - get_mid $LOW $HIGH - fi - - while [ ${DIFF} -gt 1 ]; do - TEST_ID="${MID}" - - # Test it. - - process_patch ${TEST_ID} - - # FIRST_MID being set is a signal that the build failed and we - # should start over again. - - test ${FIRST_MID} -ne 0 && return - - # Narrow the search based on the outcome of testing TEST_ID. - - if [ ${LATER} -eq 1 ]; then - msg 1 "search patches later than ${TEST_ID}" - LATER_THAN=${TEST_ID} - let LOW=MID - else - msg 1 "search patches earlier than ${TEST_ID}" - EARLIER_THAN=${TEST_ID} - let HIGH=MID - fi - - get_mid $LOW $HIGH - done -} - -######################################################################## -# Main program (so to speak) -######################################################################## - -# The error function uses this. - -VALID_RANGE=0 - -# Process the configuration file. - -if [ $# != 1 ]; then - echo Usage: $0 config_file - exit 1 -fi - -CONFIG=${1} -if [ ! -f ${CONFIG} ]; then - error "configuration file ${CONFIG} does not exist" -fi - -# OK, the config file exists. Source it, make sure required parameters -# are defined and their files exist, and give default values to optional -# parameters. - -. ${CONFIG} - -test "x${REG_UPDATE}" = "x" && error "REG_UPDATE is not defined" -test "x${REG_BUILD}" = "x" && error "REG_BUILD is not defined" -test "x${REG_TEST}" = "x" && error "REG_TEST is not defined" -test -x ${REG_TEST} || error "REG_TEST is not an executable file" -test "x${SKIP_LOW}" = "x" && SKIP_LOW=0 -test "x${SKIP_HIGH}" = "x" && SKIP_HIGH=0 -test "x${VERBOSITY}" = "x" && VERBOSITY=0 -test "x${REG_FINISH}" = "x" && REG_FINISH=true -test "x${REG_REPORT}" = "x" && REG_REPORT=true - -msg 2 "LOW_PATCH = ${LOW_PATCH}" -msg 2 "HIGH_PATCH = ${HIGH_PATCH}" -msg 2 "REG_UPDATE = ${REG_UPDATE}" -msg 2 "REG_BUILD = ${REG_BUILD}" -msg 2 "REG_TEST = ${REG_TEST}" -msg 2 "REG_NEWMID = ${REG_NEWMID}" -msg 2 "SKIP_LOW = ${SKIP_LOW}" -msg 2 "SKIP_HIGH = ${SKIP_HIGH}" -msg 2 "FIRST_MID = ${FIRST_MID}" -msg 2 "VERBOSITY = ${VERBOSITY}" - -# If REG_NEWMID was defined, assume that we're skipping known failures -# and adding to the list for new failures. If the list of failures -# doesn't exist, create it. We use a different flag, SKIP_FAILURES, -# to make it easier to separate the flag from REG_NEWMID if we want -# to change the usage later. - -if [ "x${REG_NEWMID}" != "x" ]; then - touch ${REG_FAILLIST} - SKIP_FAILURES=1 -else - SKIP_FAILURES=0 -fi - -# If FIRST_MID was defined, make sure it's in the range. - -if [ "x${FIRST_MID}" != "x" ]; then - test ${FIRST_MID} -le ${LOW_PATCH} && \ - error "FIRST_MID id is lower than LOW_PATCH" - test ${FIRST_MID} -ge ${HIGH_PATCH} && \ - error "FIRST_MID is higher than HIGH_PATCH" -else - FIRST_MID=0 -fi - -# Keep track of the bounds of the range where the test behavior changes. - -LATER_THAN=${LOW_PATCH} -EARLIER_THAN=${HIGH_PATCH} -LATER=1 - -msg 1 "LATER_THAN = ${LATER_THAN}" -msg 1 "EARLIER_THAN = ${EARLIER_THAN}" - -# Verify that the range isn't backwards. - -test ${LOW_PATCH} -lt ${HIGH_PATCH} || \ - error "patch identifier range is backwards" - -# Verify that the first and last patches in the range get the results we -# expect. If not, quit, because any of several things could be wrong. - -if [ ${SKIP_HIGH} -eq 0 ]; then - process_patch ${EARLIER_THAN} - test ${LATER} -ne 0 && \ - error "unexpected result for high patch ${EARLIER_THAN}" - msg 1 "result for high patch ${EARLIER_THAN} is as expected" -fi - -if [ ${SKIP_LOW} -eq 0 ]; then - process_patch ${LATER_THAN} - test ${LATER} -ne 1 && \ - error "unexpected result for low patch ${LATER_THAN}" - msg 1 "result for low patch ${LATER_THAN} is as expected" -fi - -# Search within the range, now that we know that the end points are valid. -# If the build failed then FIRST_MID is set to a new patch to try. - -VALID_RANGE=1 -while true; do - search_patches ${LATER_THAN} ${EARLIER_THAN} - test ${FIRST_MID} -eq 0 && break -done - -# Report where the test behavior changes. - -echo "Test result changes with id ${EARLIER_THAN}" -${REG_REPORT} ${EARLIER_THAN} - -# Invoke the optional script to verify the result and report additional -# information about changes between the two patches. - -${REG_FINISH} ${LATER_THAN} ${EARLIER_THAN} |