gdb/testsuite/gdb.base/gnu-debugdata.exp

# Copyright 2012-2020 Free Software Foundation, Inc.
#
# This program 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

standard_testfile

if [build_executable ${testfile}.exp $testfile] {
    return -1
}

set pipeline_counter 0

set objcopy_program [gdb_find_objcopy]

# Run a pipeline of processes through 'run_on_host'.
# TEST is the base name of the test, it is modified and passed to 'run_on_host'.
# Each subsequent argument is a list of the form {PROGRAM [ARG]...}.
# It is passed to 'run_on_host'.  However, before being passed, if input and
# output files are not specified in the list, then this proc provides them.
# Each program in the pipeline takes its input from the previous
# program's output.

proc pipeline {test args} {
    global pipeline_counter

    set input_file {}
    foreach arglist $args {
	verbose "raw args are $arglist"

	set program [lindex $arglist 0]
	set arguments [lindex $arglist 1]
	set input [lindex $arglist 2]
	set output [lindex $arglist 3]

	if {$input == ""} {
	    set input $input_file
	}
	if {$output == ""} {
	    set output [standard_output_file pipe.[pid].$pipeline_counter]
	    incr pipeline_counter
	}
	verbose "cooked args are [list $program $arguments $input $output]"

	if {[run_on_host "$test - invoke $program" $program $arguments \
		 $input $output]} {
	    return -1
	}

	set input_file $output
    }
    return 0
}

# Extract the dynamic symbols from the main binary, there is no need
# to also have these in the normal symbol table.
remote_file host delete ${binfile}.dynsyms
if {[pipeline "nm -D" \
	 [list [transform nm] "-D ${binfile} --format=posix --defined-only"] \
	 [list awk "\\{print\\ \\\$1\\}"] \
	 [list sort "" "" "${binfile}.dynsyms"]]} {
    return -1
}

# Extract all the text (i.e. function) symbols from the debuginfo.
# (Note that we actually also accept "D" symbols, for the benefit
# of platforms like PowerPC64 that use function descriptors.)
remote_file host delete ${binfile}.funcsyms
if {[pipeline "nm" \
	 [list [transform nm] "${binfile} --format=posix --defined-only"] \
	 [list awk "\\{if(\\\$2==\"T\"||\\\$2==\"t\"||\\\$2==\"D\")print\\ \\\$1\\}"] \
	 [list sort "" "" "${binfile}.funcsyms"]]} {
    return -1
}

# Keep all the function symbols not already in the dynamic symbol
# table.
remote_file host delete ${binfile}.keep_symbols
if {[run_on_host "comm" "comm" "-13 ${binfile}.dynsyms ${binfile}.funcsyms" "" \
	 "${binfile}.keep_symbols"]} {
    return -1
}

# GDB specific - we do not have split executable in advance.
remote_file host delete ${binfile}.strip
if {[run_on_host "strip" [transform strip] \
	 "--strip-all -R .comment -o ${binfile}.strip ${binfile}"]} {
    return -1
}

# Separate full debug info into ${binfile}.debug.
remote_file host delete ${binfile}.debug
if {[run_on_host "copydebug" ${objcopy_program} \
	 "--only-keep-debug ${binfile} ${binfile}.debug"]} {
    return -1
}

# Copy the full debuginfo, keeping only a minimal set of symbols and
# removing some unnecessary sections.
remote_file host delete ${binfile}.mini_debuginfo
if {[run_on_host "objcopy 1" ${objcopy_program} "-S --remove-section .gdb_index --remove-section .comment --keep-symbols=${binfile}.keep_symbols ${binfile}.debug ${binfile}.mini_debuginfo"]} {
    return -1
}

# Add the .gnu_debuglink section to the .gnu_debugdata file.
# .gnu_debuglink is normally not present in the .gnu_debugdata section but in
# some files there may be PT_NOTE with NT_GNU_BUILD_ID and GDB could look up
# the .debug file from it.  This is only an additional test of GDB, such link
# is not present in usual MiniDebugInfo sections.
if {[run_on_host "addlink" ${objcopy_program} \
	 "--add-gnu-debuglink=${binfile}.debug ${binfile}.mini_debuginfo ${binfile}.mini_debuginfo-debuglink"]} {
    return -1
}

# Inject the compressed data into the .gnu_debugdata section of the
# original binary.
remote_file host delete ${binfile}.mini_debuginfo-debuglink.xz
if {[run_on_host "xz" "xz" "-k ${binfile}.mini_debuginfo-debuglink"]} {
    return -1
}
remote_file host delete ${binfile}.test
if {[run_on_host "objcopy 2" ${objcopy_program} "--add-section .gnu_debugdata=${binfile}.mini_debuginfo-debuglink.xz ${binfile}.strip ${binfile}.test"]} {
    return -1
}

clean_restart "$testfile.strip"

gdb_test "p debugdata_function" \
    {No symbol table is loaded\.  Use the "file" command\.} \
    "no symtab"

clean_restart "$testfile.test"

if {$gdb_file_cmd_debug_info == "lzma"} {
    unsupported "LZMA support not available in this gdb"
} else {
    gdb_test "p debugdata_function" \
	{ = {<text variable, no debug info>} 0x[0-9a-f]+ <debugdata_function>} \
	"have symtab"
}

# Be sure to test the 'close' method on the MiniDebugInfo BFD.
if {[gdb_unload]} {
    fail "unload MiniDebugInfo"
} else {
    pass "unload MiniDebugInfo"
}

gdb_exit