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| -rw-r--r-- | Makefile | 158 |
1 files changed, 157 insertions, 1 deletions
@@ -187,7 +187,163 @@ $(common-objpfx)testrun.sh: $(common-objpfx)config.make \ mv -f $@T $@ postclean-generated += testrun.sh -others: $(common-objpfx)testrun.sh +define debugglibc +#!/bin/bash + +SOURCE_DIR="$(CURDIR)" +BUILD_DIR="$(common-objpfx)" +CMD_FILE="$(common-objpfx)debugglibc.gdb" +DIRECT=true +SYMBOLSFILE=true +unset TESTCASE +unset BREAKPOINTS +unset ENVVARS + +usage() +{ +cat << EOF +Usage: $$0 [OPTIONS] <testcase> + + where <testcase> is the path to the program being tested. + +Options: + + -h, --help + Prints this message and leaves. + + The following options require one argument: + + -b, --breakpoint + Breakpoints to set at the beginning of the execution + (each breakpoint demands its own -b option, e.g. -b foo -b bar) + -e, --environment-variable + Environment variables to be set with 'exec-wrapper env' in GDB + (each environment variable demands its own -e option, e.g. + -e FOO=foo -e BAR=bar) + + The following options do not take arguments: + + -i, --no-direct + Selects whether to pass the flag --direct to gdb. + Required for glibc test cases and not allowed for non-glibc tests. + Default behaviour is to pass the flag --direct to gdb. + -s, --no-symbols-file + Do not tell GDB to load debug symbols from the testcase. +EOF +} + +# Parse input options +while [[ $$# > 0 ]] +do + key="$$1" + case $$key in + -h|--help) + usage + exit 0 + ;; + -b|--breakpoint) + BREAKPOINTS="break $$2\n$$BREAKPOINTS" + shift + ;; + -e|--environment-variable) + ENVVARS="$$2 $$ENVVARS" + shift + ;; + -i|--no-direct) + DIRECT=false + ;; + -s|--no-symbols-file) + SYMBOLSFILE=false + ;; + *) + TESTCASE=$$1 + ;; + esac + shift +done + +# Check for required argument +if [ ! -v TESTCASE ] +then + usage + exit 1 +fi + +# Expand environment setup command +if [ -v ENVVARS ] +then + ENVVARSCMD="set exec-wrapper env $$ENVVARS" +fi + +# Expand direct argument +if [ "$$DIRECT" == true ] +then + DIRECT="--direct" +else + DIRECT="" +fi + +# Expand symbols loading command +if [ "$$SYMBOLSFILE" == true ] +then + SYMBOLSFILE="add-symbol-file $${TESTCASE}" +else + SYMBOLSFILE="" +fi + +# GDB commands template +template () +{ +cat <<EOF +set environment C -E -x c-header +set auto-load safe-path $${BUILD_DIR}/nptl_db:\$$debugdir:\$$datadir/auto-load +set libthread-db-search-path $${BUILD_DIR}/nptl_db +__ENVVARS__ +__SYMBOLSFILE__ +break _dl_start_user +run --library-path $(rpath-link):$${BUILD_DIR}/nptl_db \ +__TESTCASE__ __DIRECT__ +__BREAKPOINTS__ +EOF +} + +# Generate the commands file for gdb initialization +template | sed \ + -e "s|__ENVVARS__|$$ENVVARSCMD|" \ + -e "s|__SYMBOLSFILE__|$$SYMBOLSFILE|" \ + -e "s|__TESTCASE__|$$TESTCASE|" \ + -e "s|__DIRECT__|$$DIRECT|" \ + -e "s|__BREAKPOINTS__|$$BREAKPOINTS|" \ + > $$CMD_FILE + +echo +echo "Debugging glibc..." +echo "Build directory : $$BUILD_DIR" +echo "Source directory : $$SOURCE_DIR" +echo "GLIBC Testcase : $$TESTCASE" +echo "GDB Commands : $$CMD_FILE" +echo "Env vars : $$ENVVARS" +echo + +# Start the test case debugging in two steps: +# 1. the following command invokes gdb to run the loader; +# 2. the commands file tells the loader to run the test case. +gdb -q \ + -x $${CMD_FILE} \ + -d $${SOURCE_DIR} \ + $${BUILD_DIR}/elf/ld.so +endef + +# This is another handy script for debugging dynamically linked program +# against the current libc build for testing. +$(common-objpfx)debugglibc.sh: $(common-objpfx)config.make \ + $(..)Makeconfig $(..)Makefile + $(file >$@T,$(debugglibc)) + chmod a+x $@T + mv -f $@T $@ +postclean-generated += debugglibc.sh debugglibc.gdb + +others: $(common-objpfx)testrun.sh $(common-objpfx)debugglibc.sh # Makerules creates a file `stubs' in each subdirectory, which # contains `#define __stub_FUNCTION' for each function defined in that |