338 lines
12 KiB
Text
338 lines
12 KiB
Text
# Copyright 1997-1999, 2007-2012 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>. */
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# This file was written by Fred Fish. (fnf@cygnus.com)
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# These tests are the same as those in callfuncs.exp, except that the
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# test program here does not call malloc.
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#
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# "What in the world does malloc have to do with calling functions in
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# the inferior?" Well, nothing. GDB's ability to invoke a function
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# in the inferior program works just fine in programs that have no
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# malloc function available. It doesn't rely on the inferior's
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# malloc, directly or indirectly. It just uses the inferior's stack
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# space.
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#
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# "Then what's the point of this test file?" Well, it just so happens
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# that this file, in addition to testing inferior function calls, also
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# tests GDB's ability to evaluate string literals (like "string 1" and
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# "string 2" in the tests below). Evaluating *those* sorts of
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# expressions does require malloc.
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#
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# (As an extension to C, GDB also has a syntax for literal arrays of
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# anything, not just characters. For example, the expression
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# {2,3,4,5} (which appears in the tests below) evaluates to an array
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# of four ints. So rather than talking just about string literals,
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# we'll use the broader term "array literals".)
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#
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# Now, in this file, we only evaluate array literals when we're about
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# to pass them to a function, but don't be confused --- this is a red
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# herring. You can evaluate "abcdef" even if you're not about to pass
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# that to a function, and doing so requires malloc even if you're just
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# going to store a pointer to it in a variable, like this:
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#
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# (gdb) ptype s
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# type = char *
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# (gdb) set variable s = "abcdef"
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#
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# According to C's rules for evaluating expressions, arrays are
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# converted into pointers to their first element. This means that, in
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# order to evaluate an expression like "abcdef", GDB needs to actually
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# find some memory in the inferior we can plop the characters into;
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# then we use that memory's address as the address of our array
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# literal. GDB finds this memory by calling the inferior's malloc
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# function, if it has one. So, evaluating an array literal depends on
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# performing an inferior function call, but not vice versa. (GDB
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# can't just allocate the space on the stack; the pointer may remain
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# live long after the current frame has been popped.)
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#
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# "But, if evaluating array literals requires malloc, what's the point
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# of testing that GDB can do so in a program that doesn't have malloc?
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# It can't work!" On most systems, that's right, but HP-UX has some
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# sort of dynamic linking magic that ensures that *every* program has
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# malloc. So on HP-UX, GDB can evaluate array literals even in
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# inferior programs that don't use malloc. That's why this test is in
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# gdb.hp.
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#
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# This file has, for some reason, led to well more than its fair share
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# of misunderstandings about the relationship between array literal
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# expressions and inferior function calls. Folks talk as if you can
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# only evaluate array literals when you're about to pass them to a
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# function. I think they're assuming that, since GDB is constructing
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# a new frame on the inferior's stack (correct), it's going to use
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# that space for the array literals (incorrect). Remember that those
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# array literals may need to be live long after the inferior function
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# call returns; GDB can't tell.
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#
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# What makes the confusion worse is that there *is* a relationship
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# between array literals and inferior function calls --- GDB uses
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# inferior function calls to evaluate array literals. But many people
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# jump to other, incorrect conclusions about this.
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if $tracelevel then {
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strace $tracelevel
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}
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if { [skip_hp_tests] } then { continue }
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set testfile "callfwmall"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested callfwmall.exp
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return -1
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}
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# Create and source the file that provides information about the compiler
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# used to compile the test case.
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if [get_compiler_info ${binfile}] {
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return -1;
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}
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if {$hp_aCC_compiler} {
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set prototypes 1
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} else {
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set prototypes 0
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}
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# Some targets can't call functions, so don't even bother with this
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# test.
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if [target_info exists gdb,cannot_call_functions] {
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setup_xfail "*-*-*" 2416
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fail "This target can not call functions"
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continue
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}
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# Set the current language to C. This counts as a test. If it
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# fails, then we skip the other tests.
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proc set_lang_c {} {
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global gdb_prompt
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send_gdb "set language c\n"
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gdb_expect {
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-re ".*$gdb_prompt $" {}
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timeout { fail "set language c (timeout)" ; return 0 }
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}
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send_gdb "show language\n"
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gdb_expect {
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-re ".* source language is \"c\".*$gdb_prompt $" {
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pass "set language to \"c\""
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return 1
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}
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-re ".*$gdb_prompt $" {
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fail "setting language to \"c\""
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return 0
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}
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timeout {
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fail "can't show language (timeout)"
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return 0
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}
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}
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}
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# FIXME: Before calling this proc, we should probably verify that
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# we can call inferior functions and get a valid integral value
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# returned.
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# Note that it is OK to check for 0 or 1 as the returned values, because C
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# specifies that the numeric value of a relational or logical expression
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# (computed in the inferior) is 1 for true and 0 for false.
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proc do_function_calls {} {
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global prototypes
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global gcc_compiled
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global gdb_prompt
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# We need to up this because this can be really slow on some boards.
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set timeout 60;
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gdb_test "p t_char_values(0,0)" " = 0"
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gdb_test "p t_char_values('a','b')" " = 1"
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gdb_test "p t_char_values(char_val1,char_val2)" " = 1"
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gdb_test "p t_char_values('a',char_val2)" " = 1"
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gdb_test "p t_char_values(char_val1,'b')" " = 1"
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gdb_test "p t_short_values(0,0)" " = 0"
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gdb_test "p t_short_values(10,-23)" " = 1"
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gdb_test "p t_short_values(short_val1,short_val2)" " = 1"
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gdb_test "p t_short_values(10,short_val2)" " = 1"
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gdb_test "p t_short_values(short_val1,-23)" " = 1"
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gdb_test "p t_int_values(0,0)" " = 0"
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gdb_test "p t_int_values(87,-26)" " = 1"
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gdb_test "p t_int_values(int_val1,int_val2)" " = 1"
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gdb_test "p t_int_values(87,int_val2)" " = 1"
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gdb_test "p t_int_values(int_val1,-26)" " = 1"
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gdb_test "p t_long_values(0,0)" " = 0"
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gdb_test "p t_long_values(789,-321)" " = 1"
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gdb_test "p t_long_values(long_val1,long_val2)" " = 1"
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gdb_test "p t_long_values(789,long_val2)" " = 1"
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gdb_test "p t_long_values(long_val1,-321)" " = 1"
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if ![target_info exists gdb,skip_float_tests] {
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gdb_test "p t_float_values(0.0,0.0)" " = 0"
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# These next four tests fail on the mn10300.
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# The first value is passed in regs, the other in memory.
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# Gcc emits different stabs for the two parameters; the first is
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# claimed to be a float, the second a double.
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# dbxout.c in gcc claims this is the desired behavior.
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setup_xfail "mn10300-*-*"
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gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
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setup_xfail "mn10300-*-*"
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gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
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setup_xfail "mn10300-*-*"
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gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
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setup_xfail "mn10300-*-*"
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gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
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# Test passing of arguments which might not be widened.
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gdb_test "p t_float_values2(0.0,0.0)" " = 0"
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# Although PR 5318 mentions SunOS specifically, this seems
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# to be a generic problem on quite a few platforms.
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if $prototypes then {
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setup_xfail "sparc-*-*" "mips*-*-*" 5318
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if {!$gcc_compiled} then {
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setup_xfail "alpha-dec-osf2*" "i*86-*-sysv4*" 5318
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}
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}
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gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
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gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
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gdb_test "p t_double_values(0.0,0.0)" " = 0"
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gdb_test "p t_double_values(45.654,-67.66)" " = 1"
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gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
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gdb_test "p t_double_values(45.654,double_val2)" " = 1"
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gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
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}
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gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
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gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
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gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
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gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
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gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
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gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
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gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
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gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
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gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
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gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
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gdb_test "p doubleit(4)" " = 8"
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gdb_test "p add(4,5)" " = 9"
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gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
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gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
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# On the rs6000, we need to pass the address of the trampoline routine,
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# not the address of add itself. I don't know how to go from add to
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# the address of the trampoline. Similar problems exist on the HPPA,
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# and in fact can present an unsolvable problem as the stubs may not
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# even exist in the user's program. We've slightly recoded t_func_values
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# to avoid such problems in the common case. This may or may not help
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# the RS6000.
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setup_xfail "rs6000*-*-*"
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if {![istarget hppa*-*-hpux*]} then {
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gdb_test "p t_func_values(add,func_val2)" " = 1"
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}
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setup_xfail "rs6000*-*-*"
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if {![istarget hppa*-*-hpux*]} then {
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gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
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}
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gdb_test "p t_call_add(func_val1,3,4)" " = 7"
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setup_xfail "rs6000*-*-*"
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if {![istarget hppa*-*-hpux*]} then {
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gdb_test "p t_call_add(add,3,4)" " = 7"
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}
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gdb_test "p t_enum_value1(enumval1)" " = 1"
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gdb_test "p t_enum_value1(enum_val1)" " = 1"
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gdb_test "p t_enum_value1(enum_val2)" " = 0"
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gdb_test "p t_enum_value2(enumval2)" " = 1"
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gdb_test "p t_enum_value2(enum_val2)" " = 1"
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gdb_test "p t_enum_value2(enum_val1)" " = 0"
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gdb_test "p sum_args(1,{2})" " = 2"
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gdb_test "p sum_args(2,{2,3})" " = 5"
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gdb_test "p sum_args(3,{2,3,4})" " = 9"
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gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
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gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
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gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
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"call inferior func with struct - returns char"
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gdb_test "p t_structs_s(struct_val1)" "= 87" \
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"call inferior func with struct - returns short"
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gdb_test "p t_structs_i(struct_val1)" "= 76" \
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"call inferior func with struct - returns int"
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gdb_test "p t_structs_l(struct_val1)" "= 51" \
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"call inferior func with struct - returns long"
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gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
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"call inferior func with struct - returns float"
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gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
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"call inferior func with struct - returns double"
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gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?\"foo\"" \
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"call inferior func with struct - returns char *"
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}
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# Start with a fresh gdb.
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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gdb_test "set print sevenbit-strings" ""
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gdb_test "set print address off" ""
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gdb_test "set width 0" ""
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if { $hp_aCC_compiler } {
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# Do not set language explicitly to 'C'. This will cause aCC
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# tests to fail because promotion rules are different. Just let
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# the language be set to the default.
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if { ![runto_main] } {
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gdb_suppress_tests;
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}
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gdb_test "set overload-resolution 0" ".*"
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} else {
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if { ![set_lang_c] } {
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gdb_suppress_tests;
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} else {
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if { ![runto_main] } {
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gdb_suppress_tests;
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}
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}
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}
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gdb_test "next" ".*"
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do_function_calls
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return 0
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