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Currently inferior memory is allocated by inferior mmap() but it is never deallocated; despite the injected objfile incl. its symbols is freed. This was intentional so that one can do for example: inferior: char *str = "foo"; GDB: (gdb) compile code str = "bar"; I believe later patches will be needed to introduce full control over keeping vs. discarding the injected module as being discussed in: compile: objfiles lifetime UI https://sourceware.org/ml/gdb/2015-04/msg00051.html Message-ID: <20150429135735.GA16974@host1.jankratochvil.net> https://sourceware.org/ml/gdb/2015-05/msg00007.html As decided by Phil it is better not to leak inferior pages as users can workaround the issue above for example by: (gdb) compile code str = strdup ("bar"); I have checked that in fact gdb/doc/ (written by Phil) already expects the injected code will be unmapped so that does not need to be changed: compile code int ff = 5; p = &ff; In this example, @code{p} would point to @code{ff} when the @code{compile} command is executing the source code provided to it. However, as variables in the (example) program persist with their assigned values, the variable @code{p} would point to an invalid location when the command exists. gdb/ChangeLog 2015-04-28 Jan Kratochvil <jan.kratochvil@redhat.com> * arch-utils.c (default_infcall_munmap): New. * arch-utils.h (default_infcall_munmap): New declaration. * compile/compile-object-load.c (struct munmap_list, munmap_list_add) (munmap_list_free, munmap_listp_free_cleanup): New. (struct setup_sections_data): Add field munmap_list_headp. (setup_sections): Call munmap_list_add. (compile_object_load): New variable munmap_list_head, initialize setup_sections_data.munmap_list_headp, return munmap_list_head. * compile/compile-object-load.h (struct munmap_list): New declaration. (struct compile_module): Add field munmap_list_head. (munmap_list_free): New declaration. * compile/compile-object-run.c (struct do_module_cleanup): Add field munmap_list_head. (do_module_cleanup): Call munmap_list_free. (compile_object_run): Pass munmap_list_head to do_module_cleanup. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * gdbarch.sh (infcall_munmap): New. * linux-tdep.c (linux_infcall_munmap): New. (linux_init_abi): Install it. gdb/testsuite/ChangeLog 2015-04-28 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.compile/compile.exp (keep jit in memory): Rename to ... (do not keep jit in memory): ... this. (expect 5): Change it to ... (expect no 5): ... this.
371 lines
13 KiB
Plaintext
371 lines
13 KiB
Plaintext
# Copyright 2014-2015 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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standard_testfile .c compile-shlib.c compile-constvar.S compile-nodebug.c
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get_compiler_info
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set options {}
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if [test_compiler_info gcc*] {
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lappend options additional_flags=-g3
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}
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if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
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verbose "Skipping x86_64 LOC_CONST test."
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set srcfile3 ""
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}
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set srcfilesoptions [list ${srcfile} ${options}]
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if { $srcfile3 != "" } {
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lappend srcfilesoptions $srcfile3 ${options}
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}
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lappend srcfilesoptions $srcfile4 "nodebug"
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if { [eval build_executable_from_specs ${testfile}.exp $testfile {$options} ${srcfilesoptions}] } {
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return -1
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}
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clean_restart ${testfile}
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#
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# Test command without an running inferior.
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#
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gdb_test "compile code int i=2;" \
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"The program must be running for the compile command to work.*" \
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"Test compile code command without running inferior"
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gdb_test "compile int i=2;" \
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"The program must be running for the compile command to work.*" \
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"Test compile command without running inferior"
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gdb_test "compile file -r ${srcdir}/${subdir}/${testfile}-mod.c" \
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"The program must be running for the compile command to work.*" \
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"Test compile file command without running inferior"
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if ![runto_main] {
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return -1
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}
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if {[skip_compile_feature_tests]} {
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untested "compile command not supported (could not find libcc1 shared library?)"
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return -1
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}
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#
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# Test delimiter for code, and arguments.
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#
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gdb_test_no_output "compile -- f = 10" \
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"Test abbreviations and code delimiter"
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gdb_test "compile f = 10;" ".*= 10;: No such file.*" \
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"Test abbreviations and code collision"
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gdb_test_no_output "compile -r -- void _gdb_expr(){int i = 5;}" \
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"Test delimiter with -r"
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gdb_test_no_output "compile -raw -- void _gdb_expr(){int i = 5;}" \
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"Test delimiter with -raw"
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gdb_test "compile -- -r void _gdb_expr(){int i = 5;}" \
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".* error: 'r' undeclared \\(first use in this function\\).*" \
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"Test delimiter with -r after it"
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gdb_test "p globalvar" " = 10" "expect 10"
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gdb_test_no_output "compile code globalvar = 11" \
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"set variable without trailing semicolon"
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gdb_test "p globalvar" " = 11" "check variable without trailing semicolon"
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gdb_test_no_output "compile code globalvar = SOME_MACRO;" \
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"set variable from macro"
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gdb_test "p globalvar" " = 23" "expect 23"
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gdb_test_no_output "compile code globalvar = ARG_MACRO(0, 0);" \
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"set variable from function-like macro"
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gdb_test "p globalvar" " = -1" "expect -1"
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gdb_test_no_output "compile code globalvar = 42;" "set variable"
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gdb_test "p globalvar" " = 42" "expect 42"
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gdb_test_no_output "compile code globalvar *= 2;" "modify variable"
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gdb_test "p globalvar" " = 84" "expect 84"
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gdb_test_multiple "compile code" "compile code multiline 1" { -re "\r\n>$" {} }
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gdb_test_multiple "globalvar = 10;" "compile code multiline 2" { -re "\r\n>$" {} }
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gdb_test_multiple "globalvar *= 2;" "compile code multiline 3" { -re "\r\n>$" {} }
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gdb_test_no_output "end" "compile code multiline 4"
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gdb_test "p globalvar" " = 20" "expect 20"
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gdb_test_no_output "compile file -r ${srcdir}/${subdir}/${testfile}-mod.c" \
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"use external source file"
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gdb_test "p globalvar" " = 7" "expect 7"
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gdb_test_no_output "compile code func_static (2);" "call static function"
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gdb_test "p globalvar" " = 9" "expect 9"
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gdb_test_no_output "compile code func_global (1);" "call global function"
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gdb_test "p globalvar" " = 8" "expect 8"
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gdb_test_no_output \
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"compile code globalvar = (sizeof (ulonger) == sizeof (long))" \
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"compute size of ulonger"
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gdb_test "p globalvar" " = 1" "check size of ulonger"
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gdb_test_no_output \
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"compile code globalvar = (sizeof (longer) == sizeof (long))" \
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"compute size of longer"
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gdb_test "p globalvar" " = 1" "check size of longer"
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gdb_test_no_output "compile code globalvar = MINUS_1"
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gdb_test "p globalvar" " = -1" "check MINUS_1"
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gdb_test_no_output "compile code globalvar = static_local"
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gdb_test "p globalvar" " = 77000" "check static_local"
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gdb_test_no_output "compile code static int staticvar = 5; intptr = &staticvar" \
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"do not keep jit in memory"
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gdb_test "p *intptr" "Cannot access memory at address 0x\[0-9a-f\]+" "expect no 5"
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gdb_test "compile code func_doesnotexist ();" "warning: Could not find symbol \"func_doesnotexist\" for .*"
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gdb_test "compile code *(volatile int *) 0 = 0;" \
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"The program being debugged was signaled while in a function called from GDB\\.\r\nGDB remains in the frame where the signal was received\\.\r\n.*" \
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"compile code segfault first"
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gdb_test "bt" \
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"\r\n#0 \[^\r\n\]* in _gdb_expr \[^\r\n\]*\r\n#1 <function called from gdb>\r\n.*"
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set test "p/x \$pc"
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set infcall_pc 0
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gdb_test_multiple $test $test {
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-re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
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set infcall_pc $expect_out(1,string)
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pass $test
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}
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}
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gdb_test "info sym $infcall_pc" "\r\n_gdb_expr .*" "info sym found"
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gdb_test "return" "\r\n#0 main .*" "return" \
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"Make _gdb_expr return now\\? \\(y or n\\) " "y"
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gdb_test "info sym $infcall_pc" "\r\nNo symbol matches .*" "info sym not found"
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gdb_test_no_output "set unwindonsignal on"
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gdb_test "compile code *(volatile int *) 0 = 0;" \
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"The program being debugged was signaled while in a function called from GDB\\.\r\nGDB has restored the context to what it was before the call\\.\r\n.*" \
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"compile code segfault second"
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gdb_breakpoint [gdb_get_line_number "break-here"]
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gdb_continue_to_breakpoint "break-here" ".* break-here .*"
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gdb_test "p localvar" " = 50" "expect localvar 50"
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gdb_test_no_output "compile code localvar = 12;" "set localvar"
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gdb_test "p localvar" " = 12" "expect 12"
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gdb_test_no_output "compile code localvar *= 2;" "modify localvar"
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gdb_test "p localvar" " = 24" "expect 24"
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gdb_test_no_output "compile code localvar = shadowed" \
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"test shadowing"
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gdb_test "p localvar" " = 52" "expect 52"
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gdb_test_no_output "compile code localvar = externed"
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gdb_test "p localvar" " = 7" "test extern in inner scope"
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gdb_test_no_output "compile code vla\[2\] = 7"
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gdb_test "p vla\[2\]" " = 7"
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gdb_test_no_output \
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"compile code localvar = (sizeof (vla) == bound * sizeof (vla\[0\]))"
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gdb_test "p localvar" " = 1"
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#
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# Test setting fields and also many different types.
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#
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set test "compile code struct_object.selffield = &struct_object"
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gdb_test_multiple $test $test {
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-re "^$test\r\n$gdb_prompt $" {
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pass "$test"
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}
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-re "gdb command line:1:25: warning: assignment discards 'volatile' qualifier from pointer target type \\\[-Wdiscarded-qualifiers\\\]\r\n$gdb_prompt $" {
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xfail "$test (PR compile/18202)"
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}
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}
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gdb_test "print struct_object.selffield == &struct_object" " = 1"
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gdb_test_no_output "compile code struct_object.charfield = 1"
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gdb_test "print struct_object.charfield" " = 1 '\\\\001'"
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gdb_test_no_output "compile code struct_object.ucharfield = 1"
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gdb_test "print struct_object.ucharfield" " = 1 '\\\\001'"
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foreach {field value} {
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shortfield -5
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ushortfield 5
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intfield -7
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uintfield 7
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bitfield 2
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longfield -9
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ulongfield 9
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enumfield ONE
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floatfield 1
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doublefield 2
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} {
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gdb_test_no_output "compile code struct_object.$field = $value"
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gdb_test "print struct_object.$field" " = $value"
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}
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gdb_test_no_output "compile code struct_object.arrayfield\[2\] = 7"
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gdb_test "print struct_object.arrayfield" \
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" = \\{0, 0, 7, 0, 0\\}"
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gdb_test_no_output "compile code struct_object.complexfield = 7 + 5i"
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gdb_test "print struct_object.complexfield" " = 7 \\+ 5 \\* I"
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gdb_test_no_output "compile code struct_object.boolfield = 1"
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gdb_test "print struct_object.boolfield" " = true"
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gdb_test_no_output "compile code struct_object.vectorfield\[2\] = 7"
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gdb_test "print struct_object.vectorfield" \
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" = \\{0, 0, 7, 0\\}"
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gdb_test_no_output "compile code union_object.typedeffield = 7"
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gdb_test "print union_object.typedeffield" " = 7"
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gdb_test "print union_object.intfield" " = 7"
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# LOC_UNRESOLVED tests.
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gdb_test "print unresolved" " = 20"
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gdb_test "compile code globalvar = unresolved;"
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gdb_test "print globalvar" " = 20" "print unresolved value"
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# Test shadowing with global and static variables.
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gdb_test_no_output "compile code globalshadow += 1;"
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gdb_test "print globalshadow" " = 101"
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gdb_test_no_output "compile code extern int globalshadow; globalshadow += 5;"
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gdb_test "print 'compile.c'::globalshadow" " = 15"
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gdb_test "print globalshadow" " = 101" "print globalshadow second time"
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gdb_test_no_output "compile code staticshadow += 2;"
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gdb_test "print staticshadow" " = 202"
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# "extern int staticshadow;" cannot access static variable.
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# Raw code cannot refer to locals.
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# As it references global variable we need the #pragma.
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# For #pragma we need multiline input.
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gdb_test_multiple "compile code -r" "compile code -r multiline 1" { -re "\r\n>$" {} }
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gdb_test_multiple "#pragma GCC user_expression" "compile code -r multiline 2" { -re "\r\n>$" {} }
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gdb_test_multiple "void _gdb_expr(void) { globalshadow = 77000; }" "compile code -r multiline 3" { -re "\r\n>$" {} }
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gdb_test_no_output "end" "compile code -r multiline 4"
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gdb_test "print 'compile.c'::globalshadow" " = 77000" \
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"check globalshadow with -r"
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# Test GOT vs. resolving jit function pointers.
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gdb_test_no_output "compile -raw -- int func(){return 21;} void _gdb_expr(){ void abort (void); int (*funcp)()=func; if (funcp()!=21) abort(); }" \
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"pointer to jit function"
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#
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# Test the case where the registers structure would not normally have
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# any fields.
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#
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gdb_breakpoint [gdb_get_line_number "no_args_or_locals breakpoint"]
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gdb_continue_to_breakpoint "no_args_or_locals"
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gdb_test_no_output "compile code globalvar = 77;" "set variable to 77"
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gdb_test "p globalvar" " = 77" "expect 77"
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# Test reference to minimal_symbol, not (full) symbol.
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gdb_test_no_output "compile code globalvar = func_nodebug (75);" \
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"call func_nodebug"
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gdb_test "p globalvar" " = -75" "expect -75"
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gdb_test_no_output \
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"compile code int (*funcp) (int) = func_nodebug; globalvar = funcp (76);" \
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"call func_nodebug indirectly"
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gdb_test "p globalvar" " = -76" "expect -76"
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# Test compiled module memory protection.
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gdb_test_no_output "set debug compile on"
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gdb_test "compile code static const int readonly = 1; *(int *) &readonly = 2;" \
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"The program being debugged was signaled while in a function called from GDB\\.\r\nGDB has restored the context to what it was before the call\\.\r\n.*"
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gdb_test_no_output "set debug compile off"
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#
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# Some simple coverage tests.
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#
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gdb_test "show debug compile" "Compile debugging is .*"
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gdb_test "show compile-args" \
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"Compile command command-line arguments are .*"
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gdb_test "compile code -z" "Unknown argument.*"
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gdb_test "set lang java" \
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"Warning: the current language does not match this frame."
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gdb_test "compile code globalvar" "No compiler support for this language\."
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gdb_test_no_output "set lang auto"
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gdb_test_no_output "compile code union union_type newdecl_u"
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gdb_test_no_output "compile code struct struct_type newdecl_s"
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gdb_test_no_output "compile code inttypedef newdecl_i"
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gdb_test "compile file" \
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"You must provide a filename for this command.*" \
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"Test compile file without a filename"
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gdb_test "compile file -r" \
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"You must provide a filename with the raw option set.*" \
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"Test compile file and raw option without a filename"
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gdb_test "compile file -z" \
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"Unknown argument.*" \
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"Test compile file with unknown argument"
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# LOC_CONST tests.
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if { $srcfile3 != "" } {
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gdb_test "p constvar" " = 3"
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gdb_test "info addr constvar" {Symbol "constvar" is constant\.}
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gdb_test "compile code globalvar = constvar;"
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gdb_test "print globalvar" " = 3" "print constvar value"
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} else {
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untested "print constvar value"
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}
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# Shared library tests.
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if {[skip_shlib_tests]} {
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untested "skipping shlib tests"
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return;
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}
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set libbin [standard_output_file ${testfile}-shlib.so]
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if { [gdb_compile_shlib ${srcdir}/${subdir}/${srcfile2} $libbin {debug}] != ""
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|| [build_executable $testfile ${testfile}-shlib $srcfile \
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[list debug ldflags=$libbin]] == -1 } {
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return -1
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}
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clean_restart ${testfile}-shlib
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if ![runto_main] {
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return -1
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}
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gdb_test_no_output "compile code shlib_func ();" "call shared library function"
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gdb_test "p globalvar" " = 1" "expect 1"
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gdb_test_no_output "compile code shlibvar += 5;" "modify shared library variable"
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gdb_test "p shlibvar" " = 15" "expect 15"
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