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26e53f3eac
I'm seeing these failures on my system:
FAIL: gdb.base/nodebug.exp: p (double) mult (2.0, 3.0)
FAIL: gdb.base/nodebug.exp: p ((double (*) (double, double)) mult)(2.0f, 3.0f)
FAIL: gdb.base/nodebug.exp: p ((double (*) (double, double)) mult)(2, 3)
The problem is simply that GDB is finding a symbol named "mult" from
glibc's debug info:
(gdb) ptype mult
type = enum expression_operator {var, num, lnot, mult, divide, module, plus, minus, less_than, greater_than, less_or_equal, greater_or_equal, equal, not_equal, land, lor, qmop}
(gdb) info types expression_operator
All types matching regular expression "expression_operator":
File plural-exp.h:
enum expression_operator;
Fix this by unloading symbols from shared libraries.
gdb/testsuite/ChangeLog:
2017-09-14 Pedro Alves <palves@redhat.com>
* gdb.base/nodebug.exp (nodebug_runto): New procedure.
(top level): Use it instead of runto.
296 lines
11 KiB
Plaintext
296 lines
11 KiB
Plaintext
# Copyright 1997-2017 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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# Test that things still (sort of) work when compiled without -g.
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standard_testfile .c
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if [get_compiler_info] {
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return -1
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}
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if [test_compiler_info "xlc-*"] {
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# By default, IBM'x xlc compiler doesn't add static variables into the symtab.
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# Use "-qstatsym" to do so.
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set exec_opts additional_flags=-qstatsym
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} else {
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set exec_opts ""
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}
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if { [gdb_compile $srcdir/$subdir/$srcfile $binfile executable $exec_opts] != "" } {
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untested "failed to compile"
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return -1
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}
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# Start with a fresh gdb.
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clean_restart $binfile
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# Run to FUNC and unload symbols from system shared libraries, to
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# avoid conflicts with the minsyms in the program. E.g.,
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# intl/plural-exp.h has 'enum expression_operator {..., mult, ...}'.
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proc nodebug_runto {func} {
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with_test_prefix $func {
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if ![runto $func] {
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return false
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}
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gdb_test_no_output "nosharedlibrary" \
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"unload symbols from system libraries"
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return true
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}
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}
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# Test calling no-debug functions involving argument types that may
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# require coercion/promotion, both prototyped and unprototyped, both
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# return-type-cast style, and function-pointer-cast styles.
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proc test_call_promotion {} {
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if [target_info exists gdb,cannot_call_functions] {
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return
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}
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# Call prototyped function with float parameters via both
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# return-type cast and function-pointer cast. This checks that
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# GDB doesn't do float->double coercion.
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gdb_test "p (float) multf(2.0f, 3.0f)" " = 6"
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gdb_test "p ((float (*) (float, float)) multf)(2, 3)" " = 6"
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gdb_test "p ((float (*) (float, float)) multf)(2.0f, 3.0f)" " = 6"
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# Call unprototyped function with float parameters via
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# function-pointer cast, only. return-type cast assumes
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# protototyped. Check that GDB does float->double coercion.
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gdb_test "p ((float (*) ()) multf_noproto)(2.0f, 3.0f)" " = 6"
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gdb_test "p ((float (*) ()) multf_noproto)(2.0, 3.0)" " = 6"
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# Same, but for double.
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gdb_test "p (double) mult (2.0, 3.0)" " = 6"
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gdb_test "p ((double (*) (double, double)) mult)(2.0f, 3.0f)" " = 6"
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gdb_test "p ((double (*) (double, double)) mult)(2, 3)" " = 6"
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gdb_test "p ((double (*) ()) mult_noproto)(2.0f, 3.0f)" " = 6"
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gdb_test "p ((double (*) ()) mult_noproto)(2.0, 3.0)" " = 6"
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# Check that GDB promotes char->int correctly.
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gdb_test "p /d (uint8) add8((uint8) 2, (uint8) 3)" " = 5"
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gdb_test "p /d ((uint8 (*) (uint8, uint8)) add8)((uint8) 2, (uint8) 3)" " = 5"
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gdb_test "p /d ((uint8 (*) ()) add8_noproto)((uint8) 2, (uint8) 3)" " = 5"
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}
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if [nodebug_runto inner] then {
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# Expect to find global/local symbols in each of text/data/bss.
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# The exact format for some of this output is not necessarily
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# ideal, particularly interpreting "p top" requires a fair bit of
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# savvy about gdb's workings and the meaning of the "{}"
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# construct. So the details maybe could be tweaked. But the
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# basic purpose should be maintained, which is (a) users should be
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# able to interact with these variables with some care (they have
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# to know how to interpret them according to their real type,
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# since gdb doesn't know the type), but (b) users should be able
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# to detect that gdb does not know the type, rather than just
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# being told they are ints or functions returning int like old
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# versions of gdb used to do.
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# On alpha (and other ecoff systems) the native compilers put
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# out debugging info for non-aggregate return values of functions
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# even without -g, which should be accepted.
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with_test_prefix "func" {
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# Most languages default to printing like C.
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set c_print_re " = \\{<text variable, no debug info>\\} $hex <top>"
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set c_whatis_re " = <text variable, no debug info>"
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set c_ptype_re "= <unknown return type> \\(\\)"
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set cxx_ptype_re "= <unknown return type> \\(void\\)"
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set ada_ptype_re " = function return <unknown return type>"
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set m2_print_re " = \\{PROCEDURE <text variable, no debug info> \\(\\) : <unknown return type>\\} $hex <top>"
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set m2_whatis_re "PROCEDURE <text variable, no debug info> \\(\\) : <unknown return type>"
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set m2_ptype_re $m2_whatis_re
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# Rust can't access minsyms?
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set rust_nosym "No symbol 'top' in current context"
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set pascal_ptype_re "type = procedure : <unknown return type>"
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#LANG #PRINT #WHATIS #PTYPE
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foreach lang_line {
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{"ada" $c_print_re $c_whatis_re $ada_ptype_re}
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{"asm" $c_print_re $c_whatis_re $c_ptype_re}
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{"c" $c_print_re $c_whatis_re $c_ptype_re}
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{"c++" $c_print_re $c_whatis_re $cxx_ptype_re}
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{"d" $c_print_re $c_whatis_re $c_ptype_re}
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{"fortran" $c_print_re $c_whatis_re $c_ptype_re}
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{"go" $c_print_re $c_whatis_re $c_ptype_re}
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{"minimal" $c_print_re $c_whatis_re $c_ptype_re}
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{"modula-2" $m2_print_re $m2_whatis_re $m2_ptype_re}
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{"objective-c" $c_print_re $c_whatis_re $c_ptype_re}
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{"opencl" $c_print_re $c_whatis_re $c_ptype_re}
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{"pascal" $c_print_re $c_whatis_re $pascal_ptype_re}
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{"rust" $rust_nosym $rust_nosym $rust_nosym}
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} {
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set lang [lindex $lang_line 0]
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set print_re [lindex $lang_line 1]
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set whatis_re [lindex $lang_line 2]
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set ptype_re [lindex $lang_line 3]
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set print_re [subst "$print_re"]
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set whatis_re [subst "$whatis_re"]
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set ptype_re [subst "$ptype_re"]
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with_test_prefix "$lang" {
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gdb_test_no_output "set language $lang"
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gdb_test "p top" $print_re
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gdb_test "whatis top" $whatis_re
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gdb_test "ptype top" $ptype_re
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}
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}
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}
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gdb_test_no_output "set language auto"
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# We can't rely on uintXX_t being available/known to GDB because
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# we may or may not have debug info for those (depending on
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# whether we have debug info for the C runtime, for example).
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gdb_test_no_output "macro define uint8 unsigned char"
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gdb_test_no_output "macro define uint32 unsigned int"
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gdb_test_no_output "macro define uint64 unsigned long long"
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set data_var_type "<data variable, no debug info>"
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set unk_type_re "has unknown type.*to its declared type"
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set ptr_math_re "Cannot perform pointer math on incomplete type \"$data_var_type\", try casting to a known type, or void \\*\\."
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set not_mem_re "Attempt to take address of value not located in memory\\."
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set dataglobal_unk_re "dataglobal.*$unk_type_re"
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#exp #fmt #print #ptype/whatis
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foreach line {
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{"dataglobal" "" $dataglobal_unk_re " = $data_var_type"}
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{"(int) dataglobal" "" "= 3" " = int"}
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{"sizeof(dataglobal)" "" $dataglobal_unk_re $dataglobal_unk_re}
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{"sizeof(dataglobal + 1)" "" $dataglobal_unk_re $dataglobal_unk_re}
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{"sizeof((int) dataglobal)" "" " = $decimal" " = int"}
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{"dataglobal + 1" "" $dataglobal_unk_re $dataglobal_unk_re}
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{"&dataglobal" "" "\\($data_var_type \\*\\) $hex <dataglobal>" " = $data_var_type \\*"}
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{"&dataglobal + 1" "" $ptr_math_re $ptr_math_re}
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{"(int *) &dataglobal + 1" "" " = \\(int \\*\\) $hex <datalocal>" "int \\*"}
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{"&(int) dataglobal + 1" "" $not_mem_re $not_mem_re}
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{"&dataglobal, &dataglobal" "" "\\($data_var_type \\*\\) $hex <dataglobal>" " = $data_var_type \\*"}
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{"*dataglobal" "" $dataglobal_unk_re $dataglobal_unk_re}
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{"dataglobal8" "/x" $dataglobal_unk_re " = $data_var_type"}
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{"(uint8) dataglobal8" "/x" " = 0xff" "unsigned char"}
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{"dataglobal32_1" "/x" $dataglobal_unk_re " = $data_var_type"}
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{"(uint32) dataglobal32_1" "/x" " = 0x7fffffff" "unsigned int"}
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{"dataglobal32_2" "/x" $dataglobal_unk_re " = $data_var_type"}
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{"(uint32) dataglobal32_2" "/x" " = 0xff" "unsigned int"}
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{"dataglobal64_1" "/x" $dataglobal_unk_re " = $data_var_type"}
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{"(uint64) dataglobal64_1" "/x" " = 0x7fffffffffffffff" "unsigned long long"}
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{"dataglobal64_2" "/x" $dataglobal_unk_re " = $data_var_type"}
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{"(uint64) dataglobal64_2" "/x" " = 0xff" "unsigned long long"}
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} {
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set exp [lindex $line 0]
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# Expand variables.
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set fmt [subst -nobackslashes [lindex $line 1]]
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set print [subst -nobackslashes [lindex $line 2]]
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set whatis [subst -nobackslashes [lindex $line 3]]
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if {$fmt == ""} {
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gdb_test "p $exp" $print
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} else {
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gdb_test "p $fmt $exp" $print
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}
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gdb_test "whatis $exp" $whatis
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gdb_test "ptype $exp" $whatis
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}
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# The only symbol xcoff puts out for statics is for the TOC entry.
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# Possible, but hairy, for gdb to deal. Right now it doesn't, it
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# doesn't know the variables exist at all.
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "p datalocal" "datalocal.*$unk_type_re"
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gdb_test "p (int) datalocal" "= 4"
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "whatis datalocal" "datalocal.*$data_var_type"
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "ptype datalocal" "datalocal.*$data_var_type"
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gdb_test "p bssglobal" "bssglobal.*$unk_type_re"
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gdb_test "p (int) bssglobal" "= 0"
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gdb_test "whatis bssglobal" $data_var_type
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gdb_test "ptype bssglobal" $data_var_type
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "p bsslocal" "bsslocal.*$unk_type_re"
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gdb_test "p (int) bsslocal" "= 0"
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "whatis bsslocal" $data_var_type
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setup_xfail "rs6000*-*-aix*"
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setup_xfail "powerpc*-*-aix*"
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gdb_test "ptype bsslocal" $data_var_type
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gdb_test "backtrace 10" "#0.*inner.*#1.*middle.*#2.*top.*#3.*main.*" \
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"backtrace from inner in nodebug.exp"
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# Or if that doesn't work, at least hope for the external symbols
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# Commented out because if we aren't going to xfail the above test
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# ever, why bother with a weaker test?
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#gdb_test "backtrace 10" "#0.*inner.*#1.*#2.*top.*#3.*main.*" \
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# "backtrace from inner in nodebug.exp for externals"
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# This test is not as obscure as it might look. `p getenv ("TERM")'
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# is a real-world example, at least on many systems.
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foreach cmd {"p/c" "ptype" "whatis"} {
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gdb_test "$cmd array_index(\"abcdef\",2)" \
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"'array_index' has unknown return type; cast the call to its declared return type"
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}
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if [target_info exists gdb,cannot_call_functions] {
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unsupported "p/c (int) array_index(\"abcdef\",2)"
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} else {
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# We need to up this because this can be really slow on some boards.
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# (malloc() is called as part of the test).
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set prev_timeout $timeout
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set timeout 60
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gdb_test {p/c (int) array_index("abcdef",2)} " = 99 'c'"
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set timeout $prev_timeout
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}
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test_call_promotion
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# Now, try that we can give names of file-local symbols which happen
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# to be unique, and have it still work
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if [nodebug_runto middle] then {
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gdb_test "backtrace 10" "#0.*middle.*#1.*top.*#2.*main.*" \
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"backtrace from middle in nodebug.exp"
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}
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}
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