structs.exp

gdb-6.8 Linux下的调试程序 最新版本

# This testcase is part of GDB, the GNU debugger.

# Copyright 1996, 1997, 1999, 2003, 2004, 2007, 2008
# 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/>.

# Please email any bugs, comments, and/or additions to this file to:
# [e-mail]

if $tracelevel then {
	strace $tracelevel
}

set prms_id 0
set bug_id 0

# Some targets can't call functions, so don't even bother with this
# test.

if [target_info exists gdb,cannot_call_functions] {
    setup_xfail "*-*-*"
    fail "This target can not call functions"
    continue
}

set testfile "structs"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}

# Create and source the file that provides information about the
# compiler used to compile the test case.

if [get_compiler_info ${binfile}] {
    return -1;
}

# Compile a variant of structs.c using TYPES to specify the type of
# the first N struct elements (the remaining elements take the type of
# the last TYPES field).  Run the compmiled program up to "main".
# Also updates the global "testfile" to reflect the most recent build.

proc start_structs_test { types } {
    global testfile
    global srcfile
    global binfile
    global objdir
    global subdir
    global srcdir
    global gdb_prompt

    # Create the additional flags
    set flags "debug"
    set testfile "structs"
    set n 0
    for {set n 0} {$n<[llength ${types}]} {incr n} {
	set m [I2A ${n}]
	set t [lindex ${types} $n]
	lappend flags "additional_flags=-Dt${m}=${t}"
	append testfile "-" "$t"
    }

    set binfile ${objdir}/${subdir}/${testfile}
    if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags}"] != "" } {
	# built the second test case since we can't use prototypes
	warning "Prototypes not supported, rebuilding with -DNO_PROTOTYPES"
	if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags} additional_flags=-DNO_PROTOTYPES"] != "" } {
	    untested structs.exp
	    return -1
	}
    }

    # Start with a fresh gdb.
    gdb_exit
    gdb_start
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load ${binfile}

    # Make certain that the output is consistent
    gdb_test "set print sevenbit-strings" "" \
	    "set print sevenbit-strings; ${testfile}"
    gdb_test "set print address off" "" \
	    "set print address off; ${testfile}"
    gdb_test "set width 0" "" \
	    "set width 0; ${testfile}"

    # Advance to main
    if { ![runto_main] } then {
	gdb_suppress_tests;
    }

    # Get the debug format
    get_debug_format

    # check that at the struct containing all the relevant types is correct
    set foo_t "type = struct struct[llength ${types}] \{"
    for {set n 0} {$n<[llength ${types}]} {incr n} {
	append foo_t "\[\r\n \]+[lindex ${types} $n] [i2a $n];"
    }
    append foo_t "\[\r\n \]+\}"
    gdb_test "ptype foo[llength ${types}]" "${foo_t}" \
	    "ptype foo[llength ${types}]; ${testfile}"
}

# The expected value for fun${n}, L${n} and foo${n}.  First element is
# empty to make indexing easier.  "foo" returns the modified value,
# "zed" returns the invalid value.

proc foo { n } {
    return [lindex {
	"{}"
	"{a = 49 '1'}"
	"{a = 97 'a', b = 50 '2'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C', m = 109 'm', n = 69 'E'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D', n = 110 'n', o = 70 'F'}"
	"{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C', m = 109 'm', n = 69 'E', o = 111 'o', p = 71 'G'}"
	"{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D', n = 110 'n', o = 70 'F', p = 112 'p', q = 72 'H'}"
    } $n]
}

proc zed { n } {
    return [lindex {
	"{}"
	"{a = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z', p = 90 'Z'}"
	"{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z', p = 90 'Z', q = 90 'Z'}"
    } $n]
}

proc any { n } {
    return [lindex {
	"{}"
	"{a = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*, m = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*, m = \[^,\}\]*, n = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*, m = \[^,\}\]*, n = \[^,\}\]*, o = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*, m = \[^,\}\]*, n = \[^,\}\]*, o = \[^,\}\]*, p = \[^,\}\]*}"
	"{a = \[^,\}\]*, b = \[^,\}\]*, c = \[^,\}\]*, d = \[^,\}\]*, e = \[^,\}\]*, f = \[^,\}\]*, g = \[^,\}\]*, h = \[^,\}\]*, i = \[^,\}\]*, j = \[^,\}\]*, k = \[^,\}\]*, l = \[^,\}\]*, m = \[^,\}\]*, n = \[^,\}\]*, o = \[^,\}\]*, p = \[^,\}\]*, q = \[^,\}\]*}"
    } $n]
}

# Given N (0..25), return the corresponding alphabetic letter in lower
# or upper case.  This is ment to be i18n proof.

proc i2a { n } {
    return [string range "abcdefghijklmnopqrstuvwxyz" $n $n]
}

proc I2A { n } {
    return [string toupper [i2a $n]]
}


# Use the file name, compiler and tuples to set up any needed KFAILs.

proc setup_kfails { file tuples bug } {
    global testfile
    if [string match $file $testfile] {
	foreach f $tuples { setup_kfail $f $bug }
    }
}

proc setup_compiler_kfails { file compiler format tuples bug } {
    global testfile
    if {[string match $file $testfile] && [test_compiler_info $compiler]  && [test_debug_format $format]} {
	foreach f $tuples { setup_kfail $f $bug }
    }
}

# Test GDB's ability to make inferior function calls to functions
# returning (or passing in a single structs.

# N identifies the number of elements in the struct that will be used
# for the test case.  FAILS is a list of target tuples that will fail
# this test.

#  start_structs_test() will have previously built a program with a
# specified combination of types for those elements.  To ensure
# robustness of the output, "p/c" is used.

# This tests the code paths "which return-value convention?" and
# "extract return-value from registers" called by "infcall.c".

proc test_struct_calls { n } {
    global testfile
    global gdb_prompt

    # Check that GDB can always extract a struct-return value from an
    # inferior function call.  Since GDB always knows the location of an
    # inferior function call's return value these should never fail
    
    # Implemented by calling the parameterless function "fun$N" and then
    # examining the return value printed by GDB.

    set tests "call $n ${testfile}"

    # Call fun${n}, checking the printed return-value.
    setup_compiler_kfails structs-tc-tll gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
    setup_compiler_kfails structs-tc-td gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
    gdb_test "p/c fun${n}()"  "[foo ${n}]" "p/c fun<n>(); ${tests}"

    # Check that GDB can always pass a structure to an inferior function.
    # This test can never fail.

    # Implemented by calling the one parameter function "Fun$N" which
    # stores its parameter in the global variable "L$N".  GDB then
    # examining that global to confirm that the value is as expected.

    gdb_test "call Fun${n}(foo${n})" "" "call Fun<n>(foo<n>); ${tests}"
    setup_compiler_kfails structs-tc-tll gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
    setup_compiler_kfails structs-tc-td gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
    gdb_test "p/c L${n}" [foo ${n}] "p/c L<n>; ${tests}"
}

# Test GDB's ability to both return a function (with "return" or
# "finish") and correctly extract/store any corresponding
# return-value.

# Check that GDB can consistently extract/store structure return
# values.  There are two cases - returned in registers and returned in
# memory.  For the latter case, the return value can't be found and a
# failure is "expected".  However GDB must still both return the
# function and display the final source and line information.

# N identifies the number of elements in the struct that will be used
# for the test case.  FAILS is a list of target tuples that will fail
# this test.

# This tests the code paths "which return-value convention?", "extract
# return-value from registers", and "store return-value in registers".
# Unlike "test struct calls", this test is expected to "fail" when the
# return-value is in memory (GDB can't find the location).  The test
# is in three parts: test "return"; test "finish"; check that the two
# are consistent.  GDB can sometimes work for one command and not the
# other.

proc test_struct_returns { n } {
    global gdb_prompt
    global testfile

    set tests "return $n ${testfile}"


    # Check that "return" works.

    # GDB must always force the return of a function that has
    # a struct result.  Dependant on the ABI, it may, or may not be
    # possible to store the return value in a register.

    # The relevant code looks like "L{n} = fun{n}()".  The test forces
    # "fun{n}" to "return" with an explicit value.  Since that code
    # snippet will store the the returned value in "L{n}" the return
    # is tested by examining "L{n}".  This assumes that the
    # compiler implemented this as fun{n}(&L{n}) and hence that when
    # the value isn't stored "L{n}" remains unchanged.  Also check for
    # consistency between this and the "finish" case.

    # Get into a call of fun${n}
    gdb_test "advance fun${n}" \
	    "fun${n} .*\[\r\n\]+\[0-9\].*return foo${n}.*" \
	    "advance to fun<n> for return; ${tests}"

    # Check that the program invalidated the relevant global.
    gdb_test "p/c L${n}" " = [zed $n]" "zed L<n> for return; ${tests}"

    # Force the "return".  This checks that the return is always
    # performed, and that GDB correctly reported this to the user.
    # GDB 6.0 and earlier, when the return-value's location wasn't
    # known, both failed to print a final "source and line" and misplaced
    # the frame ("No frame").

    # The test is writen so that it only reports one FAIL/PASS for the
    # entire operation.  The value returned is checked further down.
    # "return_value_known", if non-zero, indicates that GDB knew where
    # the return value was located.

    set test "return foo<n>; ${tests}"
    set return_value_known 1
    set return_value_unimplemented 0
    gdb_test_multiple "return foo${n}" "${test}" {
	-re "The location" {
	    # Ulgh, a struct return, remember this (still need prompt).
	    set return_value_known 0
	    exp_continue
	}
	-re "A structure or union" {
	    # Ulgh, a struct return, remember this (still need prompt).
	    set return_value_known 0
	    # Double ulgh.  Architecture doesn't use return_value and
	    # hence hasn't implemented small structure return.
	    set return_value_unimplemented 1
	    exp_continue
	}
	-re "Make fun${n} return now.*y or n. $" {
	    gdb_test_multiple "y" "${test}" {
		-re "L${n} *= fun${n}.*${gdb_prompt} $" {
		    # Need to step off the function call
		    gdb_test "next" "L.* *= fun.*" "${test}"
		}
		-re "L[expr ${n} + 1] *= fun[expr ${n} + 1].*${gdb_prompt} $" {
		    pass "${test}"
		}
	    }
	}