gdb/
* Makefile.in (linux-ptrace.o): New.
* common/linux-procfs.c (linux_proc_pid_is_zombie): New,
from linux-nat.c.
* common/linux-procfs.h (linux_proc_pid_is_zombie): New declaration.
* common/linux-ptrace.c: New file.
* config/alpha/alpha-linux.mh (NATDEPFILES): Add linux-ptrace.o.
* config/arm/linux.mh: Likewise.
* config/i386/linux.mh: Likewise.
* config/i386/linux64.mh: Likewise.
* config/ia64/linux.mh: Likewise.
* config/m32r/linux.mh: Likewise.
* config/m68k/linux.mh: Likewise.
* config/mips/linux.mh: Likewise.
* config/pa/linux.mh: Likewise.
* config/powerpc/linux.mh: Likewise.
* config/powerpc/ppc64-linux.mh: Likewise.
* config/powerpc/spu-linux.mh: Likewise.
* config/s390/s390.mh: Likewise.
* config/sparc/linux.mh: Likewise.
* config/sparc/linux64.mh: Likewise.
* config/xtensa/linux.mh: Likewise.
* linux-nat.c (linux_lwp_is_zombie): Remove, move it to
common/linux-procfs.c.
(wait_lwp): Rename linux_lwp_is_zombie to linux_proc_pid_is_zombie.
gdb/gdbserver/
* Makefile.in (linux-ptrace.o): New.
* configure.srv (arm*-*-linux*, bfin-*-*linux*, crisv32-*-linux*)
(cris-*-linux*, i[34567]86-*-linux*, ia64-*-linux*, m32r*-*-linux*)
(m68*-*-linux*, m68*-*-uclinux*, mips*-*-linux*, powerpc*-*-linux*)
(s390*-*-linux*, sh*-*-linux*, sparc*-*-linux*, tic6x-*-uclinux)
(x86_64-*-linux*, xtensa*-*-linux*): Add linux-ptrace.o to SRV_TGTOBJ
of these targets.
* linux-low.c (linux_attach_lwp_1): Remove redundent else clause.
2012-03-13 23:00:37 +08:00
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/* Linux-specific ptrace manipulation routines.
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2014-01-01 11:54:24 +08:00
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Copyright (C) 2012-2014 Free Software Foundation, Inc.
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gdb/
* Makefile.in (linux-ptrace.o): New.
* common/linux-procfs.c (linux_proc_pid_is_zombie): New,
from linux-nat.c.
* common/linux-procfs.h (linux_proc_pid_is_zombie): New declaration.
* common/linux-ptrace.c: New file.
* config/alpha/alpha-linux.mh (NATDEPFILES): Add linux-ptrace.o.
* config/arm/linux.mh: Likewise.
* config/i386/linux.mh: Likewise.
* config/i386/linux64.mh: Likewise.
* config/ia64/linux.mh: Likewise.
* config/m32r/linux.mh: Likewise.
* config/m68k/linux.mh: Likewise.
* config/mips/linux.mh: Likewise.
* config/pa/linux.mh: Likewise.
* config/powerpc/linux.mh: Likewise.
* config/powerpc/ppc64-linux.mh: Likewise.
* config/powerpc/spu-linux.mh: Likewise.
* config/s390/s390.mh: Likewise.
* config/sparc/linux.mh: Likewise.
* config/sparc/linux64.mh: Likewise.
* config/xtensa/linux.mh: Likewise.
* linux-nat.c (linux_lwp_is_zombie): Remove, move it to
common/linux-procfs.c.
(wait_lwp): Rename linux_lwp_is_zombie to linux_proc_pid_is_zombie.
gdb/gdbserver/
* Makefile.in (linux-ptrace.o): New.
* configure.srv (arm*-*-linux*, bfin-*-*linux*, crisv32-*-linux*)
(cris-*-linux*, i[34567]86-*-linux*, ia64-*-linux*, m32r*-*-linux*)
(m68*-*-linux*, m68*-*-uclinux*, mips*-*-linux*, powerpc*-*-linux*)
(s390*-*-linux*, sh*-*-linux*, sparc*-*-linux*, tic6x-*-uclinux)
(x86_64-*-linux*, xtensa*-*-linux*): Add linux-ptrace.o to SRV_TGTOBJ
of these targets.
* linux-low.c (linux_attach_lwp_1): Remove redundent else clause.
2012-03-13 23:00:37 +08:00
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This file is part of GDB.
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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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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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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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#ifdef GDBSERVER
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#include "server.h"
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#else
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#include "defs.h"
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remove gdb_string.h
This removes gdb_string.h. This patch is purely mechanical. I
created it by running the two commands:
git rm common/gdb_string.h
perl -pi -e's/"gdb_string.h"/<string.h>/;' *.[chyl] */*.[chyl]
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_string.h: Remove.
* aarch64-tdep.c: Use string.h, not gdb_string.h.
* ada-exp.y: Use string.h, not gdb_string.h.
* ada-lang.c: Use string.h, not gdb_string.h.
* ada-lex.l: Use string.h, not gdb_string.h.
* ada-typeprint.c: Use string.h, not gdb_string.h.
* ada-valprint.c: Use string.h, not gdb_string.h.
* aix-thread.c: Use string.h, not gdb_string.h.
* alpha-linux-tdep.c: Use string.h, not gdb_string.h.
* alpha-mdebug-tdep.c: Use string.h, not gdb_string.h.
* alpha-nat.c: Use string.h, not gdb_string.h.
* alpha-osf1-tdep.c: Use string.h, not gdb_string.h.
* alpha-tdep.c: Use string.h, not gdb_string.h.
* alphanbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64-dicos-tdep.c: Use string.h, not gdb_string.h.
* amd64-linux-nat.c: Use string.h, not gdb_string.h.
* amd64-linux-tdep.c: Use string.h, not gdb_string.h.
* amd64-nat.c: Use string.h, not gdb_string.h.
* amd64-sol2-tdep.c: Use string.h, not gdb_string.h.
* amd64fbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64obsd-tdep.c: Use string.h, not gdb_string.h.
* arch-utils.c: Use string.h, not gdb_string.h.
* arm-linux-nat.c: Use string.h, not gdb_string.h.
* arm-linux-tdep.c: Use string.h, not gdb_string.h.
* arm-tdep.c: Use string.h, not gdb_string.h.
* arm-wince-tdep.c: Use string.h, not gdb_string.h.
* armbsd-tdep.c: Use string.h, not gdb_string.h.
* armnbsd-nat.c: Use string.h, not gdb_string.h.
* armnbsd-tdep.c: Use string.h, not gdb_string.h.
* armobsd-tdep.c: Use string.h, not gdb_string.h.
* avr-tdep.c: Use string.h, not gdb_string.h.
* ax-gdb.c: Use string.h, not gdb_string.h.
* ax-general.c: Use string.h, not gdb_string.h.
* bcache.c: Use string.h, not gdb_string.h.
* bfin-tdep.c: Use string.h, not gdb_string.h.
* breakpoint.c: Use string.h, not gdb_string.h.
* build-id.c: Use string.h, not gdb_string.h.
* buildsym.c: Use string.h, not gdb_string.h.
* c-exp.y: Use string.h, not gdb_string.h.
* c-lang.c: Use string.h, not gdb_string.h.
* c-typeprint.c: Use string.h, not gdb_string.h.
* c-valprint.c: Use string.h, not gdb_string.h.
* charset.c: Use string.h, not gdb_string.h.
* cli-out.c: Use string.h, not gdb_string.h.
* cli/cli-cmds.c: Use string.h, not gdb_string.h.
* cli/cli-decode.c: Use string.h, not gdb_string.h.
* cli/cli-dump.c: Use string.h, not gdb_string.h.
* cli/cli-interp.c: Use string.h, not gdb_string.h.
* cli/cli-logging.c: Use string.h, not gdb_string.h.
* cli/cli-script.c: Use string.h, not gdb_string.h.
* cli/cli-setshow.c: Use string.h, not gdb_string.h.
* cli/cli-utils.c: Use string.h, not gdb_string.h.
* coffread.c: Use string.h, not gdb_string.h.
* common/common-utils.c: Use string.h, not gdb_string.h.
* common/filestuff.c: Use string.h, not gdb_string.h.
* common/linux-procfs.c: Use string.h, not gdb_string.h.
* common/linux-ptrace.c: Use string.h, not gdb_string.h.
* common/signals.c: Use string.h, not gdb_string.h.
* common/vec.h: Use string.h, not gdb_string.h.
* core-regset.c: Use string.h, not gdb_string.h.
* corefile.c: Use string.h, not gdb_string.h.
* corelow.c: Use string.h, not gdb_string.h.
* cp-abi.c: Use string.h, not gdb_string.h.
* cp-support.c: Use string.h, not gdb_string.h.
* cp-valprint.c: Use string.h, not gdb_string.h.
* cris-tdep.c: Use string.h, not gdb_string.h.
* d-lang.c: Use string.h, not gdb_string.h.
* dbxread.c: Use string.h, not gdb_string.h.
* dcache.c: Use string.h, not gdb_string.h.
* demangle.c: Use string.h, not gdb_string.h.
* dicos-tdep.c: Use string.h, not gdb_string.h.
* disasm.c: Use string.h, not gdb_string.h.
* doublest.c: Use string.h, not gdb_string.h.
* dsrec.c: Use string.h, not gdb_string.h.
* dummy-frame.c: Use string.h, not gdb_string.h.
* dwarf2-frame.c: Use string.h, not gdb_string.h.
* dwarf2loc.c: Use string.h, not gdb_string.h.
* dwarf2read.c: Use string.h, not gdb_string.h.
* elfread.c: Use string.h, not gdb_string.h.
* environ.c: Use string.h, not gdb_string.h.
* eval.c: Use string.h, not gdb_string.h.
* event-loop.c: Use string.h, not gdb_string.h.
* exceptions.c: Use string.h, not gdb_string.h.
* exec.c: Use string.h, not gdb_string.h.
* expprint.c: Use string.h, not gdb_string.h.
* f-exp.y: Use string.h, not gdb_string.h.
* f-lang.c: Use string.h, not gdb_string.h.
* f-typeprint.c: Use string.h, not gdb_string.h.
* f-valprint.c: Use string.h, not gdb_string.h.
* fbsd-nat.c: Use string.h, not gdb_string.h.
* findcmd.c: Use string.h, not gdb_string.h.
* findvar.c: Use string.h, not gdb_string.h.
* fork-child.c: Use string.h, not gdb_string.h.
* frame.c: Use string.h, not gdb_string.h.
* frv-linux-tdep.c: Use string.h, not gdb_string.h.
* frv-tdep.c: Use string.h, not gdb_string.h.
* gdb.c: Use string.h, not gdb_string.h.
* gdb_bfd.c: Use string.h, not gdb_string.h.
* gdbarch.c: Use string.h, not gdb_string.h.
* gdbtypes.c: Use string.h, not gdb_string.h.
* gnu-nat.c: Use string.h, not gdb_string.h.
* gnu-v2-abi.c: Use string.h, not gdb_string.h.
* gnu-v3-abi.c: Use string.h, not gdb_string.h.
* go-exp.y: Use string.h, not gdb_string.h.
* go-lang.c: Use string.h, not gdb_string.h.
* go32-nat.c: Use string.h, not gdb_string.h.
* hppa-hpux-tdep.c: Use string.h, not gdb_string.h.
* hppa-linux-nat.c: Use string.h, not gdb_string.h.
* hppanbsd-tdep.c: Use string.h, not gdb_string.h.
* hppaobsd-tdep.c: Use string.h, not gdb_string.h.
* i386-cygwin-tdep.c: Use string.h, not gdb_string.h.
* i386-dicos-tdep.c: Use string.h, not gdb_string.h.
* i386-linux-nat.c: Use string.h, not gdb_string.h.
* i386-linux-tdep.c: Use string.h, not gdb_string.h.
* i386-nto-tdep.c: Use string.h, not gdb_string.h.
* i386-sol2-tdep.c: Use string.h, not gdb_string.h.
* i386-tdep.c: Use string.h, not gdb_string.h.
* i386bsd-tdep.c: Use string.h, not gdb_string.h.
* i386gnu-nat.c: Use string.h, not gdb_string.h.
* i386nbsd-tdep.c: Use string.h, not gdb_string.h.
* i386obsd-tdep.c: Use string.h, not gdb_string.h.
* i387-tdep.c: Use string.h, not gdb_string.h.
* ia64-libunwind-tdep.c: Use string.h, not gdb_string.h.
* ia64-linux-nat.c: Use string.h, not gdb_string.h.
* inf-child.c: Use string.h, not gdb_string.h.
* inf-ptrace.c: Use string.h, not gdb_string.h.
* inf-ttrace.c: Use string.h, not gdb_string.h.
* infcall.c: Use string.h, not gdb_string.h.
* infcmd.c: Use string.h, not gdb_string.h.
* inflow.c: Use string.h, not gdb_string.h.
* infrun.c: Use string.h, not gdb_string.h.
* interps.c: Use string.h, not gdb_string.h.
* iq2000-tdep.c: Use string.h, not gdb_string.h.
* irix5-nat.c: Use string.h, not gdb_string.h.
* jv-exp.y: Use string.h, not gdb_string.h.
* jv-lang.c: Use string.h, not gdb_string.h.
* jv-typeprint.c: Use string.h, not gdb_string.h.
* jv-valprint.c: Use string.h, not gdb_string.h.
* language.c: Use string.h, not gdb_string.h.
* linux-fork.c: Use string.h, not gdb_string.h.
* linux-nat.c: Use string.h, not gdb_string.h.
* lm32-tdep.c: Use string.h, not gdb_string.h.
* m2-exp.y: Use string.h, not gdb_string.h.
* m2-typeprint.c: Use string.h, not gdb_string.h.
* m32c-tdep.c: Use string.h, not gdb_string.h.
* m32r-linux-nat.c: Use string.h, not gdb_string.h.
* m32r-linux-tdep.c: Use string.h, not gdb_string.h.
* m32r-rom.c: Use string.h, not gdb_string.h.
* m32r-tdep.c: Use string.h, not gdb_string.h.
* m68hc11-tdep.c: Use string.h, not gdb_string.h.
* m68k-tdep.c: Use string.h, not gdb_string.h.
* m68kbsd-tdep.c: Use string.h, not gdb_string.h.
* m68klinux-nat.c: Use string.h, not gdb_string.h.
* m68klinux-tdep.c: Use string.h, not gdb_string.h.
* m88k-tdep.c: Use string.h, not gdb_string.h.
* macrocmd.c: Use string.h, not gdb_string.h.
* main.c: Use string.h, not gdb_string.h.
* mdebugread.c: Use string.h, not gdb_string.h.
* mem-break.c: Use string.h, not gdb_string.h.
* memattr.c: Use string.h, not gdb_string.h.
* memory-map.c: Use string.h, not gdb_string.h.
* mep-tdep.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-break.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-disas.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-env.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-stack.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-var.c: Use string.h, not gdb_string.h.
* mi/mi-cmds.c: Use string.h, not gdb_string.h.
* mi/mi-console.c: Use string.h, not gdb_string.h.
* mi/mi-getopt.c: Use string.h, not gdb_string.h.
* mi/mi-interp.c: Use string.h, not gdb_string.h.
* mi/mi-main.c: Use string.h, not gdb_string.h.
* mi/mi-parse.c: Use string.h, not gdb_string.h.
* microblaze-rom.c: Use string.h, not gdb_string.h.
* microblaze-tdep.c: Use string.h, not gdb_string.h.
* mingw-hdep.c: Use string.h, not gdb_string.h.
* minidebug.c: Use string.h, not gdb_string.h.
* minsyms.c: Use string.h, not gdb_string.h.
* mips-irix-tdep.c: Use string.h, not gdb_string.h.
* mips-linux-tdep.c: Use string.h, not gdb_string.h.
* mips-tdep.c: Use string.h, not gdb_string.h.
* mips64obsd-tdep.c: Use string.h, not gdb_string.h.
* mipsnbsd-tdep.c: Use string.h, not gdb_string.h.
* mipsread.c: Use string.h, not gdb_string.h.
* mn10300-linux-tdep.c: Use string.h, not gdb_string.h.
* mn10300-tdep.c: Use string.h, not gdb_string.h.
* monitor.c: Use string.h, not gdb_string.h.
* moxie-tdep.c: Use string.h, not gdb_string.h.
* mt-tdep.c: Use string.h, not gdb_string.h.
* nbsd-tdep.c: Use string.h, not gdb_string.h.
* nios2-linux-tdep.c: Use string.h, not gdb_string.h.
* nto-procfs.c: Use string.h, not gdb_string.h.
* nto-tdep.c: Use string.h, not gdb_string.h.
* objc-lang.c: Use string.h, not gdb_string.h.
* objfiles.c: Use string.h, not gdb_string.h.
* opencl-lang.c: Use string.h, not gdb_string.h.
* osabi.c: Use string.h, not gdb_string.h.
* osdata.c: Use string.h, not gdb_string.h.
* p-exp.y: Use string.h, not gdb_string.h.
* p-lang.c: Use string.h, not gdb_string.h.
* p-typeprint.c: Use string.h, not gdb_string.h.
* parse.c: Use string.h, not gdb_string.h.
* posix-hdep.c: Use string.h, not gdb_string.h.
* ppc-linux-nat.c: Use string.h, not gdb_string.h.
* ppc-sysv-tdep.c: Use string.h, not gdb_string.h.
* ppcfbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcnbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcobsd-tdep.c: Use string.h, not gdb_string.h.
* printcmd.c: Use string.h, not gdb_string.h.
* procfs.c: Use string.h, not gdb_string.h.
* prologue-value.c: Use string.h, not gdb_string.h.
* python/py-auto-load.c: Use string.h, not gdb_string.h.
* python/py-gdb-readline.c: Use string.h, not gdb_string.h.
* ravenscar-thread.c: Use string.h, not gdb_string.h.
* regcache.c: Use string.h, not gdb_string.h.
* registry.c: Use string.h, not gdb_string.h.
* remote-fileio.c: Use string.h, not gdb_string.h.
* remote-m32r-sdi.c: Use string.h, not gdb_string.h.
* remote-mips.c: Use string.h, not gdb_string.h.
* remote-sim.c: Use string.h, not gdb_string.h.
* remote.c: Use string.h, not gdb_string.h.
* reverse.c: Use string.h, not gdb_string.h.
* rs6000-aix-tdep.c: Use string.h, not gdb_string.h.
* ser-base.c: Use string.h, not gdb_string.h.
* ser-go32.c: Use string.h, not gdb_string.h.
* ser-mingw.c: Use string.h, not gdb_string.h.
* ser-pipe.c: Use string.h, not gdb_string.h.
* ser-tcp.c: Use string.h, not gdb_string.h.
* ser-unix.c: Use string.h, not gdb_string.h.
* serial.c: Use string.h, not gdb_string.h.
* sh-tdep.c: Use string.h, not gdb_string.h.
* sh64-tdep.c: Use string.h, not gdb_string.h.
* shnbsd-tdep.c: Use string.h, not gdb_string.h.
* skip.c: Use string.h, not gdb_string.h.
* sol-thread.c: Use string.h, not gdb_string.h.
* solib-dsbt.c: Use string.h, not gdb_string.h.
* solib-frv.c: Use string.h, not gdb_string.h.
* solib-osf.c: Use string.h, not gdb_string.h.
* solib-spu.c: Use string.h, not gdb_string.h.
* solib-target.c: Use string.h, not gdb_string.h.
* solib.c: Use string.h, not gdb_string.h.
* somread.c: Use string.h, not gdb_string.h.
* source.c: Use string.h, not gdb_string.h.
* sparc-nat.c: Use string.h, not gdb_string.h.
* sparc-sol2-tdep.c: Use string.h, not gdb_string.h.
* sparc-tdep.c: Use string.h, not gdb_string.h.
* sparc64-tdep.c: Use string.h, not gdb_string.h.
* sparc64fbsd-tdep.c: Use string.h, not gdb_string.h.
* sparc64nbsd-tdep.c: Use string.h, not gdb_string.h.
* sparcnbsd-tdep.c: Use string.h, not gdb_string.h.
* spu-linux-nat.c: Use string.h, not gdb_string.h.
* spu-multiarch.c: Use string.h, not gdb_string.h.
* spu-tdep.c: Use string.h, not gdb_string.h.
* stabsread.c: Use string.h, not gdb_string.h.
* stack.c: Use string.h, not gdb_string.h.
* std-regs.c: Use string.h, not gdb_string.h.
* symfile.c: Use string.h, not gdb_string.h.
* symmisc.c: Use string.h, not gdb_string.h.
* symtab.c: Use string.h, not gdb_string.h.
* target.c: Use string.h, not gdb_string.h.
* thread.c: Use string.h, not gdb_string.h.
* tilegx-linux-nat.c: Use string.h, not gdb_string.h.
* tilegx-tdep.c: Use string.h, not gdb_string.h.
* top.c: Use string.h, not gdb_string.h.
* tracepoint.c: Use string.h, not gdb_string.h.
* tui/tui-command.c: Use string.h, not gdb_string.h.
* tui/tui-data.c: Use string.h, not gdb_string.h.
* tui/tui-disasm.c: Use string.h, not gdb_string.h.
* tui/tui-file.c: Use string.h, not gdb_string.h.
* tui/tui-layout.c: Use string.h, not gdb_string.h.
* tui/tui-out.c: Use string.h, not gdb_string.h.
* tui/tui-regs.c: Use string.h, not gdb_string.h.
* tui/tui-source.c: Use string.h, not gdb_string.h.
* tui/tui-stack.c: Use string.h, not gdb_string.h.
* tui/tui-win.c: Use string.h, not gdb_string.h.
* tui/tui-windata.c: Use string.h, not gdb_string.h.
* tui/tui-winsource.c: Use string.h, not gdb_string.h.
* typeprint.c: Use string.h, not gdb_string.h.
* ui-file.c: Use string.h, not gdb_string.h.
* ui-out.c: Use string.h, not gdb_string.h.
* user-regs.c: Use string.h, not gdb_string.h.
* utils.c: Use string.h, not gdb_string.h.
* v850-tdep.c: Use string.h, not gdb_string.h.
* valarith.c: Use string.h, not gdb_string.h.
* valops.c: Use string.h, not gdb_string.h.
* valprint.c: Use string.h, not gdb_string.h.
* value.c: Use string.h, not gdb_string.h.
* varobj.c: Use string.h, not gdb_string.h.
* vax-tdep.c: Use string.h, not gdb_string.h.
* vaxnbsd-tdep.c: Use string.h, not gdb_string.h.
* vaxobsd-tdep.c: Use string.h, not gdb_string.h.
* windows-nat.c: Use string.h, not gdb_string.h.
* xcoffread.c: Use string.h, not gdb_string.h.
* xml-support.c: Use string.h, not gdb_string.h.
* xstormy16-tdep.c: Use string.h, not gdb_string.h.
* xtensa-linux-nat.c: Use string.h, not gdb_string.h.
2013-11-06 22:14:23 +08:00
|
|
|
#include <string.h>
|
gdb/
* Makefile.in (linux-ptrace.o): New.
* common/linux-procfs.c (linux_proc_pid_is_zombie): New,
from linux-nat.c.
* common/linux-procfs.h (linux_proc_pid_is_zombie): New declaration.
* common/linux-ptrace.c: New file.
* config/alpha/alpha-linux.mh (NATDEPFILES): Add linux-ptrace.o.
* config/arm/linux.mh: Likewise.
* config/i386/linux.mh: Likewise.
* config/i386/linux64.mh: Likewise.
* config/ia64/linux.mh: Likewise.
* config/m32r/linux.mh: Likewise.
* config/m68k/linux.mh: Likewise.
* config/mips/linux.mh: Likewise.
* config/pa/linux.mh: Likewise.
* config/powerpc/linux.mh: Likewise.
* config/powerpc/ppc64-linux.mh: Likewise.
* config/powerpc/spu-linux.mh: Likewise.
* config/s390/s390.mh: Likewise.
* config/sparc/linux.mh: Likewise.
* config/sparc/linux64.mh: Likewise.
* config/xtensa/linux.mh: Likewise.
* linux-nat.c (linux_lwp_is_zombie): Remove, move it to
common/linux-procfs.c.
(wait_lwp): Rename linux_lwp_is_zombie to linux_proc_pid_is_zombie.
gdb/gdbserver/
* Makefile.in (linux-ptrace.o): New.
* configure.srv (arm*-*-linux*, bfin-*-*linux*, crisv32-*-linux*)
(cris-*-linux*, i[34567]86-*-linux*, ia64-*-linux*, m32r*-*-linux*)
(m68*-*-linux*, m68*-*-uclinux*, mips*-*-linux*, powerpc*-*-linux*)
(s390*-*-linux*, sh*-*-linux*, sparc*-*-linux*, tic6x-*-uclinux)
(x86_64-*-linux*, xtensa*-*-linux*): Add linux-ptrace.o to SRV_TGTOBJ
of these targets.
* linux-low.c (linux_attach_lwp_1): Remove redundent else clause.
2012-03-13 23:00:37 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#include "linux-ptrace.h"
|
2012-03-13 23:02:25 +08:00
|
|
|
#include "linux-procfs.h"
|
2014-06-19 21:46:38 +08:00
|
|
|
#include "linux-waitpid.h"
|
2012-03-13 23:02:25 +08:00
|
|
|
#include "buffer.h"
|
2012-07-07 20:13:57 +08:00
|
|
|
#include "gdb_assert.h"
|
2012-11-16 00:12:19 +08:00
|
|
|
#include "gdb_wait.h"
|
2012-03-13 23:02:25 +08:00
|
|
|
|
2013-08-28 22:09:31 +08:00
|
|
|
#include <stdint.h>
|
|
|
|
|
|
2013-08-23 07:46:30 +08:00
|
|
|
/* Stores the currently supported ptrace options. A value of
|
|
|
|
|
-1 means we did not check for features yet. A value of 0 means
|
|
|
|
|
there are no supported features. */
|
|
|
|
|
static int current_ptrace_options = -1;
|
|
|
|
|
|
PR server/16255: gdbserver cannot attach to a second inferior that is multi-threaded.
On Linux, we need to explicitly ptrace attach to all lwps of a
process. Because GDB might not be connected yet when an attach is
requested, and thus it may not be possible to activate thread_db, as
that requires access to symbols (IOW, gdbserver --attach), a while ago
we make linux_attach loop over the lwps as listed by /proc/PID/task to
find the lwps to attach to.
linux_attach_lwp_1 has:
...
if (initial)
/* If lwp is the tgid, we handle adding existing threads later.
Otherwise we just add lwp without bothering about any other
threads. */
ptid = ptid_build (lwpid, lwpid, 0);
else
{
/* Note that extracting the pid from the current inferior is
safe, since we're always called in the context of the same
process as this new thread. */
int pid = pid_of (current_inferior);
ptid = ptid_build (pid, lwpid, 0);
}
That "safe" comment referred to linux_attach_lwp being called by
thread-db.c. But this was clearly missed when a new call to
linux_attach_lwp_1 was added to linux_attach. As a result,
current_inferior will be set to some random process, and non-initial
lwps of the second inferior get assigned the pid of the wrong
inferior. E.g., in the case of attaching to two inferiors, for the
second inferior (and so on), non-initial lwps of the second inferior
get assigned the pid of the first inferior. This doesn't trigger on
the first inferior, when current_inferior is NULL, add_thread switches
the current inferior to the newly added thread.
Rather than making linux_attach switch current_inferior temporarily
(thus avoiding further reliance on global state), or making
linux_attach_lwp_1 get the tgid from /proc, which add extra syscalls,
and will be wrong in case of the user having originally attached
directly to a non-tgid lwp, and then that lwp spawning new clones (the
ptid.pid field of further new clones should be the same as the
original lwp's pid, which is not the tgid), we note that callers of
linux_attach_lwp/linux_attach_lwp_1 always have the right pid handy
already, so they can pass it down along with the lwpid.
The only other reason for the "initial" parameter is to error out
instead of warn in case of attach failure, when we're first attaching
to a process. There are only three callers of
linux_attach_lwp/linux_attach_lwp_1, and each wants to print a
different warn/error string, so we can just move the error/warn out of
linux_attach_lwp_1 to the callers, thus getting rid of the "initial"
parameter.
There really nothing gdbserver-specific about attaching to two
threaded processes, so this adds a new test under gdb.multi/. The
test passes cleanly against the native GNU/Linux target, but
fails/triggers the bug against GDBserver (before the patch), with the
native-extended-remote board (as plain remote doesn't support
multi-process).
Tested on x86_64 Fedora 17, with the native-extended-gdbserver board.
gdb/gdbserver/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* linux-low.c (linux_attach_fail_reason_string): New function.
(linux_attach_lwp): Delete.
(linux_attach_lwp_1): Rename to ...
(linux_attach_lwp): ... this. Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach): Adjust to call linux_attach_lwp. Call error on
failure to attach to the tgid. Call warning when failing to
attach to an lwp.
* linux-low.h (linux_attach_lwp): Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach_fail_reason_string): New declaration.
* thread-db.c (attach_thread): Adjust to linux_attach_lwp's
interface change. Use linux_attach_fail_reason_string.
gdb/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* common/linux-ptrace.c (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this. Remove "warning: "
and newline from built string.
* common/linux-ptrace.h (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this.
* linux-nat.c (linux_nat_attach): Adjust to use
linux_ptrace_attach_fail_reason.
gdb/testsuite/
2014-04-25 Simon Marchi <simon.marchi@ericsson.com>
Pedro Alves <palves@redhat.com>
PR server/16255
* gdb.multi/multi-attach.c: New file.
* gdb.multi/multi-attach.exp: New file.
2014-04-26 02:07:33 +08:00
|
|
|
/* Find all possible reasons we could fail to attach PID and append
|
|
|
|
|
these as strings to the already initialized BUFFER. '\0'
|
|
|
|
|
termination of BUFFER must be done by the caller. */
|
2012-03-13 23:02:25 +08:00
|
|
|
|
|
|
|
|
void
|
PR server/16255: gdbserver cannot attach to a second inferior that is multi-threaded.
On Linux, we need to explicitly ptrace attach to all lwps of a
process. Because GDB might not be connected yet when an attach is
requested, and thus it may not be possible to activate thread_db, as
that requires access to symbols (IOW, gdbserver --attach), a while ago
we make linux_attach loop over the lwps as listed by /proc/PID/task to
find the lwps to attach to.
linux_attach_lwp_1 has:
...
if (initial)
/* If lwp is the tgid, we handle adding existing threads later.
Otherwise we just add lwp without bothering about any other
threads. */
ptid = ptid_build (lwpid, lwpid, 0);
else
{
/* Note that extracting the pid from the current inferior is
safe, since we're always called in the context of the same
process as this new thread. */
int pid = pid_of (current_inferior);
ptid = ptid_build (pid, lwpid, 0);
}
That "safe" comment referred to linux_attach_lwp being called by
thread-db.c. But this was clearly missed when a new call to
linux_attach_lwp_1 was added to linux_attach. As a result,
current_inferior will be set to some random process, and non-initial
lwps of the second inferior get assigned the pid of the wrong
inferior. E.g., in the case of attaching to two inferiors, for the
second inferior (and so on), non-initial lwps of the second inferior
get assigned the pid of the first inferior. This doesn't trigger on
the first inferior, when current_inferior is NULL, add_thread switches
the current inferior to the newly added thread.
Rather than making linux_attach switch current_inferior temporarily
(thus avoiding further reliance on global state), or making
linux_attach_lwp_1 get the tgid from /proc, which add extra syscalls,
and will be wrong in case of the user having originally attached
directly to a non-tgid lwp, and then that lwp spawning new clones (the
ptid.pid field of further new clones should be the same as the
original lwp's pid, which is not the tgid), we note that callers of
linux_attach_lwp/linux_attach_lwp_1 always have the right pid handy
already, so they can pass it down along with the lwpid.
The only other reason for the "initial" parameter is to error out
instead of warn in case of attach failure, when we're first attaching
to a process. There are only three callers of
linux_attach_lwp/linux_attach_lwp_1, and each wants to print a
different warn/error string, so we can just move the error/warn out of
linux_attach_lwp_1 to the callers, thus getting rid of the "initial"
parameter.
There really nothing gdbserver-specific about attaching to two
threaded processes, so this adds a new test under gdb.multi/. The
test passes cleanly against the native GNU/Linux target, but
fails/triggers the bug against GDBserver (before the patch), with the
native-extended-remote board (as plain remote doesn't support
multi-process).
Tested on x86_64 Fedora 17, with the native-extended-gdbserver board.
gdb/gdbserver/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* linux-low.c (linux_attach_fail_reason_string): New function.
(linux_attach_lwp): Delete.
(linux_attach_lwp_1): Rename to ...
(linux_attach_lwp): ... this. Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach): Adjust to call linux_attach_lwp. Call error on
failure to attach to the tgid. Call warning when failing to
attach to an lwp.
* linux-low.h (linux_attach_lwp): Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach_fail_reason_string): New declaration.
* thread-db.c (attach_thread): Adjust to linux_attach_lwp's
interface change. Use linux_attach_fail_reason_string.
gdb/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* common/linux-ptrace.c (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this. Remove "warning: "
and newline from built string.
* common/linux-ptrace.h (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this.
* linux-nat.c (linux_nat_attach): Adjust to use
linux_ptrace_attach_fail_reason.
gdb/testsuite/
2014-04-25 Simon Marchi <simon.marchi@ericsson.com>
Pedro Alves <palves@redhat.com>
PR server/16255
* gdb.multi/multi-attach.c: New file.
* gdb.multi/multi-attach.exp: New file.
2014-04-26 02:07:33 +08:00
|
|
|
linux_ptrace_attach_fail_reason (pid_t pid, struct buffer *buffer)
|
2012-03-13 23:02:25 +08:00
|
|
|
{
|
|
|
|
|
pid_t tracerpid;
|
|
|
|
|
|
|
|
|
|
tracerpid = linux_proc_get_tracerpid (pid);
|
|
|
|
|
if (tracerpid > 0)
|
PR server/16255: gdbserver cannot attach to a second inferior that is multi-threaded.
On Linux, we need to explicitly ptrace attach to all lwps of a
process. Because GDB might not be connected yet when an attach is
requested, and thus it may not be possible to activate thread_db, as
that requires access to symbols (IOW, gdbserver --attach), a while ago
we make linux_attach loop over the lwps as listed by /proc/PID/task to
find the lwps to attach to.
linux_attach_lwp_1 has:
...
if (initial)
/* If lwp is the tgid, we handle adding existing threads later.
Otherwise we just add lwp without bothering about any other
threads. */
ptid = ptid_build (lwpid, lwpid, 0);
else
{
/* Note that extracting the pid from the current inferior is
safe, since we're always called in the context of the same
process as this new thread. */
int pid = pid_of (current_inferior);
ptid = ptid_build (pid, lwpid, 0);
}
That "safe" comment referred to linux_attach_lwp being called by
thread-db.c. But this was clearly missed when a new call to
linux_attach_lwp_1 was added to linux_attach. As a result,
current_inferior will be set to some random process, and non-initial
lwps of the second inferior get assigned the pid of the wrong
inferior. E.g., in the case of attaching to two inferiors, for the
second inferior (and so on), non-initial lwps of the second inferior
get assigned the pid of the first inferior. This doesn't trigger on
the first inferior, when current_inferior is NULL, add_thread switches
the current inferior to the newly added thread.
Rather than making linux_attach switch current_inferior temporarily
(thus avoiding further reliance on global state), or making
linux_attach_lwp_1 get the tgid from /proc, which add extra syscalls,
and will be wrong in case of the user having originally attached
directly to a non-tgid lwp, and then that lwp spawning new clones (the
ptid.pid field of further new clones should be the same as the
original lwp's pid, which is not the tgid), we note that callers of
linux_attach_lwp/linux_attach_lwp_1 always have the right pid handy
already, so they can pass it down along with the lwpid.
The only other reason for the "initial" parameter is to error out
instead of warn in case of attach failure, when we're first attaching
to a process. There are only three callers of
linux_attach_lwp/linux_attach_lwp_1, and each wants to print a
different warn/error string, so we can just move the error/warn out of
linux_attach_lwp_1 to the callers, thus getting rid of the "initial"
parameter.
There really nothing gdbserver-specific about attaching to two
threaded processes, so this adds a new test under gdb.multi/. The
test passes cleanly against the native GNU/Linux target, but
fails/triggers the bug against GDBserver (before the patch), with the
native-extended-remote board (as plain remote doesn't support
multi-process).
Tested on x86_64 Fedora 17, with the native-extended-gdbserver board.
gdb/gdbserver/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* linux-low.c (linux_attach_fail_reason_string): New function.
(linux_attach_lwp): Delete.
(linux_attach_lwp_1): Rename to ...
(linux_attach_lwp): ... this. Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach): Adjust to call linux_attach_lwp. Call error on
failure to attach to the tgid. Call warning when failing to
attach to an lwp.
* linux-low.h (linux_attach_lwp): Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach_fail_reason_string): New declaration.
* thread-db.c (attach_thread): Adjust to linux_attach_lwp's
interface change. Use linux_attach_fail_reason_string.
gdb/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* common/linux-ptrace.c (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this. Remove "warning: "
and newline from built string.
* common/linux-ptrace.h (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this.
* linux-nat.c (linux_nat_attach): Adjust to use
linux_ptrace_attach_fail_reason.
gdb/testsuite/
2014-04-25 Simon Marchi <simon.marchi@ericsson.com>
Pedro Alves <palves@redhat.com>
PR server/16255
* gdb.multi/multi-attach.c: New file.
* gdb.multi/multi-attach.exp: New file.
2014-04-26 02:07:33 +08:00
|
|
|
buffer_xml_printf (buffer, _("process %d is already traced "
|
|
|
|
|
"by process %d"),
|
2012-03-13 23:02:25 +08:00
|
|
|
(int) pid, (int) tracerpid);
|
|
|
|
|
|
|
|
|
|
if (linux_proc_pid_is_zombie (pid))
|
PR server/16255: gdbserver cannot attach to a second inferior that is multi-threaded.
On Linux, we need to explicitly ptrace attach to all lwps of a
process. Because GDB might not be connected yet when an attach is
requested, and thus it may not be possible to activate thread_db, as
that requires access to symbols (IOW, gdbserver --attach), a while ago
we make linux_attach loop over the lwps as listed by /proc/PID/task to
find the lwps to attach to.
linux_attach_lwp_1 has:
...
if (initial)
/* If lwp is the tgid, we handle adding existing threads later.
Otherwise we just add lwp without bothering about any other
threads. */
ptid = ptid_build (lwpid, lwpid, 0);
else
{
/* Note that extracting the pid from the current inferior is
safe, since we're always called in the context of the same
process as this new thread. */
int pid = pid_of (current_inferior);
ptid = ptid_build (pid, lwpid, 0);
}
That "safe" comment referred to linux_attach_lwp being called by
thread-db.c. But this was clearly missed when a new call to
linux_attach_lwp_1 was added to linux_attach. As a result,
current_inferior will be set to some random process, and non-initial
lwps of the second inferior get assigned the pid of the wrong
inferior. E.g., in the case of attaching to two inferiors, for the
second inferior (and so on), non-initial lwps of the second inferior
get assigned the pid of the first inferior. This doesn't trigger on
the first inferior, when current_inferior is NULL, add_thread switches
the current inferior to the newly added thread.
Rather than making linux_attach switch current_inferior temporarily
(thus avoiding further reliance on global state), or making
linux_attach_lwp_1 get the tgid from /proc, which add extra syscalls,
and will be wrong in case of the user having originally attached
directly to a non-tgid lwp, and then that lwp spawning new clones (the
ptid.pid field of further new clones should be the same as the
original lwp's pid, which is not the tgid), we note that callers of
linux_attach_lwp/linux_attach_lwp_1 always have the right pid handy
already, so they can pass it down along with the lwpid.
The only other reason for the "initial" parameter is to error out
instead of warn in case of attach failure, when we're first attaching
to a process. There are only three callers of
linux_attach_lwp/linux_attach_lwp_1, and each wants to print a
different warn/error string, so we can just move the error/warn out of
linux_attach_lwp_1 to the callers, thus getting rid of the "initial"
parameter.
There really nothing gdbserver-specific about attaching to two
threaded processes, so this adds a new test under gdb.multi/. The
test passes cleanly against the native GNU/Linux target, but
fails/triggers the bug against GDBserver (before the patch), with the
native-extended-remote board (as plain remote doesn't support
multi-process).
Tested on x86_64 Fedora 17, with the native-extended-gdbserver board.
gdb/gdbserver/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* linux-low.c (linux_attach_fail_reason_string): New function.
(linux_attach_lwp): Delete.
(linux_attach_lwp_1): Rename to ...
(linux_attach_lwp): ... this. Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach): Adjust to call linux_attach_lwp. Call error on
failure to attach to the tgid. Call warning when failing to
attach to an lwp.
* linux-low.h (linux_attach_lwp): Take a ptid instead of a pid as
argument. Remove "initial" parameter. Return int instead of
void. Don't error or warn here.
(linux_attach_fail_reason_string): New declaration.
* thread-db.c (attach_thread): Adjust to linux_attach_lwp's
interface change. Use linux_attach_fail_reason_string.
gdb/
2014-04-25 Pedro Alves <palves@redhat.com>
PR server/16255
* common/linux-ptrace.c (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this. Remove "warning: "
and newline from built string.
* common/linux-ptrace.h (linux_ptrace_attach_warnings): Rename to ...
(linux_ptrace_attach_fail_reason): ... this.
* linux-nat.c (linux_nat_attach): Adjust to use
linux_ptrace_attach_fail_reason.
gdb/testsuite/
2014-04-25 Simon Marchi <simon.marchi@ericsson.com>
Pedro Alves <palves@redhat.com>
PR server/16255
* gdb.multi/multi-attach.c: New file.
* gdb.multi/multi-attach.exp: New file.
2014-04-26 02:07:33 +08:00
|
|
|
buffer_xml_printf (buffer, _("process %d is a zombie "
|
|
|
|
|
"- the process has already terminated"),
|
2012-03-13 23:02:25 +08:00
|
|
|
(int) pid);
|
|
|
|
|
}
|
2012-07-07 20:13:57 +08:00
|
|
|
|
2012-09-18 02:27:58 +08:00
|
|
|
#if defined __i386__ || defined __x86_64__
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
/* Address of the 'ret' instruction in asm code block below. */
|
|
|
|
|
extern void (linux_ptrace_test_ret_to_nx_instr) (void);
|
|
|
|
|
|
|
|
|
|
#include <sys/reg.h>
|
|
|
|
|
#include <sys/mman.h>
|
|
|
|
|
#include <signal.h>
|
|
|
|
|
|
2012-09-18 02:27:58 +08:00
|
|
|
#endif /* defined __i386__ || defined __x86_64__ */
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
/* Test broken off-trunk Linux kernel patchset for NX support on i386. It was
|
2012-09-18 02:27:58 +08:00
|
|
|
removed in Fedora kernel 88fa1f0332d188795ed73d7ac2b1564e11a0b4cd.
|
|
|
|
|
|
|
|
|
|
Test also x86_64 arch for PaX support. */
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_ptrace_test_ret_to_nx (void)
|
|
|
|
|
{
|
2012-09-18 02:27:58 +08:00
|
|
|
#if defined __i386__ || defined __x86_64__
|
2012-07-07 20:13:57 +08:00
|
|
|
pid_t child, got_pid;
|
|
|
|
|
gdb_byte *return_address, *pc;
|
|
|
|
|
long l;
|
2013-03-11 02:07:57 +08:00
|
|
|
int status, kill_status;
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
return_address = mmap (NULL, 2, PROT_READ | PROT_WRITE,
|
|
|
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
|
if (return_address == MAP_FAILED)
|
|
|
|
|
{
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: Cannot mmap: %s"),
|
|
|
|
|
strerror (errno));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Put there 'int3'. */
|
|
|
|
|
*return_address = 0xcc;
|
|
|
|
|
|
|
|
|
|
child = fork ();
|
|
|
|
|
switch (child)
|
|
|
|
|
{
|
|
|
|
|
case -1:
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: Cannot fork: %s"),
|
|
|
|
|
strerror (errno));
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case 0:
|
2013-08-23 07:46:30 +08:00
|
|
|
l = ptrace (PTRACE_TRACEME, 0, (PTRACE_TYPE_ARG3) NULL,
|
|
|
|
|
(PTRACE_TYPE_ARG4) NULL);
|
2012-07-07 20:13:57 +08:00
|
|
|
if (l != 0)
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: Cannot PTRACE_TRACEME: %s"),
|
|
|
|
|
strerror (errno));
|
|
|
|
|
else
|
|
|
|
|
{
|
2012-09-18 02:27:58 +08:00
|
|
|
#if defined __i386__
|
2012-07-07 20:13:57 +08:00
|
|
|
asm volatile ("pushl %0;"
|
|
|
|
|
".globl linux_ptrace_test_ret_to_nx_instr;"
|
|
|
|
|
"linux_ptrace_test_ret_to_nx_instr:"
|
|
|
|
|
"ret"
|
|
|
|
|
: : "r" (return_address) : "%esp", "memory");
|
2012-09-18 02:27:58 +08:00
|
|
|
#elif defined __x86_64__
|
|
|
|
|
asm volatile ("pushq %0;"
|
|
|
|
|
".globl linux_ptrace_test_ret_to_nx_instr;"
|
|
|
|
|
"linux_ptrace_test_ret_to_nx_instr:"
|
|
|
|
|
"ret"
|
2013-01-09 03:38:51 +08:00
|
|
|
: : "r" ((uint64_t) (uintptr_t) return_address)
|
|
|
|
|
: "%rsp", "memory");
|
2012-09-18 02:27:58 +08:00
|
|
|
#else
|
|
|
|
|
# error "!__i386__ && !__x86_64__"
|
|
|
|
|
#endif
|
2012-07-07 20:13:57 +08:00
|
|
|
gdb_assert_not_reached ("asm block did not terminate");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
_exit (1);
|
|
|
|
|
}
|
|
|
|
|
|
2012-09-18 02:27:58 +08:00
|
|
|
errno = 0;
|
2012-07-07 20:13:57 +08:00
|
|
|
got_pid = waitpid (child, &status, 0);
|
2012-09-18 02:27:58 +08:00
|
|
|
if (got_pid != child)
|
|
|
|
|
{
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: waitpid returned %ld: %s"),
|
|
|
|
|
(long) got_pid, strerror (errno));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (WIFSIGNALED (status))
|
|
|
|
|
{
|
|
|
|
|
if (WTERMSIG (status) != SIGKILL)
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: WTERMSIG %d is not SIGKILL!"),
|
|
|
|
|
(int) WTERMSIG (status));
|
|
|
|
|
else
|
|
|
|
|
warning (_("Cannot call inferior functions, Linux kernel PaX "
|
|
|
|
|
"protection forbids return to non-executable pages!"));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!WIFSTOPPED (status))
|
|
|
|
|
{
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: status %d is not WIFSTOPPED!"),
|
|
|
|
|
status);
|
|
|
|
|
return;
|
|
|
|
|
}
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
/* We may get SIGSEGV due to missing PROT_EXEC of the return_address. */
|
2012-09-18 02:27:58 +08:00
|
|
|
if (WSTOPSIG (status) != SIGTRAP && WSTOPSIG (status) != SIGSEGV)
|
|
|
|
|
{
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: "
|
|
|
|
|
"WSTOPSIG %d is neither SIGTRAP nor SIGSEGV!"),
|
|
|
|
|
(int) WSTOPSIG (status));
|
|
|
|
|
return;
|
|
|
|
|
}
|
2012-07-07 20:13:57 +08:00
|
|
|
|
|
|
|
|
errno = 0;
|
2012-09-18 02:27:58 +08:00
|
|
|
#if defined __i386__
|
2013-08-23 07:46:30 +08:00
|
|
|
l = ptrace (PTRACE_PEEKUSER, child, (PTRACE_TYPE_ARG3) (uintptr_t) (EIP * 4),
|
|
|
|
|
(PTRACE_TYPE_ARG4) NULL);
|
2012-09-18 02:27:58 +08:00
|
|
|
#elif defined __x86_64__
|
2013-08-23 07:46:30 +08:00
|
|
|
l = ptrace (PTRACE_PEEKUSER, child, (PTRACE_TYPE_ARG3) (uintptr_t) (RIP * 8),
|
|
|
|
|
(PTRACE_TYPE_ARG4) NULL);
|
2012-09-18 02:27:58 +08:00
|
|
|
#else
|
|
|
|
|
# error "!__i386__ && !__x86_64__"
|
|
|
|
|
#endif
|
|
|
|
|
if (errno != 0)
|
|
|
|
|
{
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: Cannot PTRACE_PEEKUSER: %s"),
|
|
|
|
|
strerror (errno));
|
|
|
|
|
return;
|
|
|
|
|
}
|
2012-07-07 20:13:57 +08:00
|
|
|
pc = (void *) (uintptr_t) l;
|
|
|
|
|
|
2013-03-11 02:07:57 +08:00
|
|
|
kill (child, SIGKILL);
|
2013-08-23 07:46:30 +08:00
|
|
|
ptrace (PTRACE_KILL, child, (PTRACE_TYPE_ARG3) NULL,
|
|
|
|
|
(PTRACE_TYPE_ARG4) NULL);
|
2013-03-11 02:07:57 +08:00
|
|
|
|
|
|
|
|
errno = 0;
|
|
|
|
|
got_pid = waitpid (child, &kill_status, 0);
|
|
|
|
|
if (got_pid != child)
|
2012-09-18 02:27:58 +08:00
|
|
|
{
|
2013-03-11 02:07:57 +08:00
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: "
|
|
|
|
|
"PTRACE_KILL waitpid returned %ld: %s"),
|
|
|
|
|
(long) got_pid, strerror (errno));
|
2012-09-18 02:27:58 +08:00
|
|
|
return;
|
|
|
|
|
}
|
2013-03-11 02:07:57 +08:00
|
|
|
if (!WIFSIGNALED (kill_status))
|
2012-07-07 20:13:57 +08:00
|
|
|
{
|
2013-03-11 02:07:57 +08:00
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: "
|
|
|
|
|
"PTRACE_KILL status %d is not WIFSIGNALED!"),
|
|
|
|
|
status);
|
|
|
|
|
return;
|
2012-07-07 20:13:57 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* + 1 is there as x86* stops after the 'int3' instruction. */
|
|
|
|
|
if (WSTOPSIG (status) == SIGTRAP && pc == return_address + 1)
|
|
|
|
|
{
|
|
|
|
|
/* PASS */
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We may get SIGSEGV due to missing PROT_EXEC of the RETURN_ADDRESS page. */
|
|
|
|
|
if (WSTOPSIG (status) == SIGSEGV && pc == return_address)
|
|
|
|
|
{
|
|
|
|
|
/* PASS */
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2012-09-18 02:27:58 +08:00
|
|
|
if ((void (*) (void)) pc != &linux_ptrace_test_ret_to_nx_instr)
|
|
|
|
|
warning (_("linux_ptrace_test_ret_to_nx: PC %p is neither near return "
|
|
|
|
|
"address %p nor is the return instruction %p!"),
|
|
|
|
|
pc, return_address, &linux_ptrace_test_ret_to_nx_instr);
|
|
|
|
|
else
|
2013-02-26 01:32:06 +08:00
|
|
|
warning (_("Cannot call inferior functions on this system - "
|
|
|
|
|
"Linux kernel with broken i386 NX (non-executable pages) "
|
|
|
|
|
"support detected!"));
|
2012-09-18 02:27:58 +08:00
|
|
|
#endif /* defined __i386__ || defined __x86_64__ */
|
2012-07-07 20:13:57 +08:00
|
|
|
}
|
|
|
|
|
|
2013-08-23 07:46:30 +08:00
|
|
|
/* Helper function to fork a process and make the child process call
|
|
|
|
|
the function FUNCTION, passing CHILD_STACK as parameter.
|
|
|
|
|
|
|
|
|
|
For MMU-less targets, clone is used instead of fork, and
|
|
|
|
|
CHILD_STACK is used as stack space for the cloned child. If NULL,
|
|
|
|
|
stack space is allocated via malloc (and subsequently passed to
|
|
|
|
|
FUNCTION). For MMU targets, CHILD_STACK is ignored. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
linux_fork_to_function (gdb_byte *child_stack, void (*function) (gdb_byte *))
|
|
|
|
|
{
|
|
|
|
|
int child_pid;
|
|
|
|
|
|
|
|
|
|
/* Sanity check the function pointer. */
|
|
|
|
|
gdb_assert (function != NULL);
|
|
|
|
|
|
|
|
|
|
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
|
|
|
|
|
#define STACK_SIZE 4096
|
|
|
|
|
|
|
|
|
|
if (child_stack == NULL)
|
|
|
|
|
child_stack = xmalloc (STACK_SIZE * 4);
|
|
|
|
|
|
|
|
|
|
/* Use CLONE_VM instead of fork, to support uClinux (no MMU). */
|
2013-08-23 10:34:34 +08:00
|
|
|
#ifdef __ia64__
|
2013-08-23 07:46:30 +08:00
|
|
|
child_pid = __clone2 (function, child_stack, STACK_SIZE,
|
|
|
|
|
CLONE_VM | SIGCHLD, child_stack + STACK_SIZE * 2);
|
2013-08-23 10:34:34 +08:00
|
|
|
#else /* !__ia64__ */
|
2013-08-23 07:46:30 +08:00
|
|
|
child_pid = clone (function, child_stack + STACK_SIZE,
|
|
|
|
|
CLONE_VM | SIGCHLD, child_stack + STACK_SIZE * 2);
|
2013-08-23 10:34:34 +08:00
|
|
|
#endif /* !__ia64__ */
|
2013-08-23 07:46:30 +08:00
|
|
|
#else /* !defined(__UCLIBC) && defined(HAS_NOMMU) */
|
|
|
|
|
child_pid = fork ();
|
|
|
|
|
|
|
|
|
|
if (child_pid == 0)
|
|
|
|
|
function (NULL);
|
|
|
|
|
#endif /* defined(__UCLIBC) && defined(HAS_NOMMU) */
|
|
|
|
|
|
|
|
|
|
if (child_pid == -1)
|
|
|
|
|
perror_with_name (("fork"));
|
|
|
|
|
|
|
|
|
|
return child_pid;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* A helper function for linux_check_ptrace_features, called after
|
|
|
|
|
the child forks a grandchild. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_grandchild_function (gdb_byte *child_stack)
|
|
|
|
|
{
|
|
|
|
|
/* Free any allocated stack. */
|
|
|
|
|
xfree (child_stack);
|
|
|
|
|
|
|
|
|
|
/* This code is only reacheable by the grandchild (child's child)
|
|
|
|
|
process. */
|
|
|
|
|
_exit (0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* A helper function for linux_check_ptrace_features, called after
|
|
|
|
|
the parent process forks a child. The child allows itself to
|
|
|
|
|
be traced by its parent. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_child_function (gdb_byte *child_stack)
|
|
|
|
|
{
|
|
|
|
|
ptrace (PTRACE_TRACEME, 0, (PTRACE_TYPE_ARG3) 0, (PTRACE_TYPE_ARG4) 0);
|
|
|
|
|
kill (getpid (), SIGSTOP);
|
|
|
|
|
|
|
|
|
|
/* Fork a grandchild. */
|
|
|
|
|
linux_fork_to_function (child_stack, linux_grandchild_function);
|
|
|
|
|
|
|
|
|
|
/* This code is only reacheable by the child (grandchild's parent)
|
|
|
|
|
process. */
|
|
|
|
|
_exit (0);
|
|
|
|
|
}
|
|
|
|
|
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
static void linux_test_for_tracesysgood (int child_pid);
|
|
|
|
|
static void linux_test_for_tracefork (int child_pid);
|
|
|
|
|
|
2013-08-23 07:46:30 +08:00
|
|
|
/* Determine ptrace features available on this target. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_check_ptrace_features (void)
|
|
|
|
|
{
|
|
|
|
|
int child_pid, ret, status;
|
|
|
|
|
|
|
|
|
|
/* Initialize the options. */
|
|
|
|
|
current_ptrace_options = 0;
|
|
|
|
|
|
|
|
|
|
/* Fork a child so we can do some testing. The child will call
|
|
|
|
|
linux_child_function and will get traced. The child will
|
|
|
|
|
eventually fork a grandchild so we can test fork event
|
|
|
|
|
reporting. */
|
|
|
|
|
child_pid = linux_fork_to_function (NULL, linux_child_function);
|
|
|
|
|
|
|
|
|
|
ret = my_waitpid (child_pid, &status, 0);
|
|
|
|
|
if (ret == -1)
|
|
|
|
|
perror_with_name (("waitpid"));
|
|
|
|
|
else if (ret != child_pid)
|
|
|
|
|
error (_("linux_check_ptrace_features: waitpid: unexpected result %d."),
|
|
|
|
|
ret);
|
|
|
|
|
if (! WIFSTOPPED (status))
|
|
|
|
|
error (_("linux_check_ptrace_features: waitpid: unexpected status %d."),
|
|
|
|
|
status);
|
|
|
|
|
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
linux_test_for_tracesysgood (child_pid);
|
2013-08-23 07:46:30 +08:00
|
|
|
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
linux_test_for_tracefork (child_pid);
|
|
|
|
|
|
|
|
|
|
/* Clean things up and kill any pending children. */
|
|
|
|
|
do
|
2013-08-23 07:46:30 +08:00
|
|
|
{
|
|
|
|
|
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) 0);
|
|
|
|
|
if (ret != 0)
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
warning (_("linux_check_ptrace_features: failed to kill child"));
|
|
|
|
|
my_waitpid (child_pid, &status, 0);
|
2013-08-23 07:46:30 +08:00
|
|
|
}
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
while (WIFSTOPPED (status));
|
|
|
|
|
}
|
2013-08-23 07:46:30 +08:00
|
|
|
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
/* Determine if PTRACE_O_TRACESYSGOOD can be used to catch
|
|
|
|
|
syscalls. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_test_for_tracesysgood (int child_pid)
|
|
|
|
|
{
|
2013-08-23 07:46:30 +08:00
|
|
|
#ifdef GDBSERVER
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
/* gdbserver does not support PTRACE_O_TRACESYSGOOD. */
|
2013-08-23 07:46:30 +08:00
|
|
|
#else
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
int ret;
|
|
|
|
|
|
2013-08-23 07:46:30 +08:00
|
|
|
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) PTRACE_O_TRACESYSGOOD);
|
|
|
|
|
if (ret == 0)
|
|
|
|
|
current_ptrace_options |= PTRACE_O_TRACESYSGOOD;
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
#endif
|
|
|
|
|
}
|
2013-08-23 07:46:30 +08:00
|
|
|
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
/* Determine if PTRACE_O_TRACEFORK can be used to follow fork
|
|
|
|
|
events. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
linux_test_for_tracefork (int child_pid)
|
|
|
|
|
{
|
|
|
|
|
int ret, status;
|
|
|
|
|
long second_pid;
|
|
|
|
|
|
|
|
|
|
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
|
|
|
|
|
know for sure that it is not supported. */
|
|
|
|
|
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
|
|
|
|
|
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
#ifdef GDBSERVER
|
|
|
|
|
/* gdbserver does not support PTRACE_O_TRACEVFORKDONE yet. */
|
|
|
|
|
#else
|
2013-08-23 07:46:30 +08:00
|
|
|
/* Check if the target supports PTRACE_O_TRACEVFORKDONE. */
|
|
|
|
|
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) (PTRACE_O_TRACEFORK
|
|
|
|
|
| PTRACE_O_TRACEVFORKDONE));
|
|
|
|
|
if (ret == 0)
|
|
|
|
|
current_ptrace_options |= PTRACE_O_TRACEVFORKDONE;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Setting PTRACE_O_TRACEFORK did not cause an error, however we
|
|
|
|
|
don't know for sure that the feature is available; old
|
|
|
|
|
versions of PTRACE_SETOPTIONS ignored unknown options.
|
|
|
|
|
Therefore, we attach to the child process, use PTRACE_SETOPTIONS
|
|
|
|
|
to enable fork tracing, and let it fork. If the process exits,
|
|
|
|
|
we assume that we can't use PTRACE_O_TRACEFORK; if we get the
|
|
|
|
|
fork notification, and we can extract the new child's PID, then
|
|
|
|
|
we assume that we can.
|
|
|
|
|
|
|
|
|
|
We do not explicitly check for vfork tracing here. It is
|
|
|
|
|
assumed that vfork tracing is available whenever fork tracing
|
|
|
|
|
is available. */
|
|
|
|
|
ret = ptrace (PTRACE_CONT, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) 0);
|
|
|
|
|
if (ret != 0)
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
warning (_("linux_test_for_tracefork: failed to resume child"));
|
2013-08-23 07:46:30 +08:00
|
|
|
|
|
|
|
|
ret = my_waitpid (child_pid, &status, 0);
|
|
|
|
|
|
|
|
|
|
/* Check if we received a fork event notification. */
|
|
|
|
|
if (ret == child_pid && WIFSTOPPED (status)
|
|
|
|
|
&& status >> 16 == PTRACE_EVENT_FORK)
|
|
|
|
|
{
|
|
|
|
|
/* We did receive a fork event notification. Make sure its PID
|
|
|
|
|
is reported. */
|
|
|
|
|
second_pid = 0;
|
|
|
|
|
ret = ptrace (PTRACE_GETEVENTMSG, child_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) &second_pid);
|
|
|
|
|
if (ret == 0 && second_pid != 0)
|
|
|
|
|
{
|
|
|
|
|
int second_status;
|
|
|
|
|
|
|
|
|
|
/* We got the PID from the grandchild, which means fork
|
|
|
|
|
tracing is supported. */
|
|
|
|
|
#ifdef GDBSERVER
|
|
|
|
|
/* Do not enable all the options for now since gdbserver does not
|
|
|
|
|
properly support them. This restriction will be lifted when
|
|
|
|
|
gdbserver is augmented to support them. */
|
|
|
|
|
current_ptrace_options |= PTRACE_O_TRACECLONE;
|
|
|
|
|
#else
|
|
|
|
|
current_ptrace_options |= PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK
|
|
|
|
|
| PTRACE_O_TRACECLONE | PTRACE_O_TRACEEXEC;
|
|
|
|
|
|
|
|
|
|
/* Do not enable PTRACE_O_TRACEEXIT until GDB is more prepared to
|
|
|
|
|
support read-only process state. */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Do some cleanup and kill the grandchild. */
|
|
|
|
|
my_waitpid (second_pid, &second_status, 0);
|
|
|
|
|
ret = ptrace (PTRACE_KILL, second_pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) 0);
|
|
|
|
|
if (ret != 0)
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
warning (_("linux_test_for_tracefork: "
|
2013-08-23 07:46:30 +08:00
|
|
|
"failed to kill second child"));
|
|
|
|
|
my_waitpid (second_pid, &status, 0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
Always run the PTRACE_O_TRACESYSGOOD tests even if PTRACE_O_TRACEFORK is not supported.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
2013-10-03 18:13:34 +08:00
|
|
|
warning (_("linux_test_for_tracefork: unexpected result from waitpid "
|
2013-08-23 07:46:30 +08:00
|
|
|
"(%d, status 0x%x)"), ret, status);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Enable reporting of all currently supported ptrace events. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
linux_enable_event_reporting (pid_t pid)
|
|
|
|
|
{
|
|
|
|
|
/* Check if we have initialized the ptrace features for this
|
|
|
|
|
target. If not, do it now. */
|
|
|
|
|
if (current_ptrace_options == -1)
|
|
|
|
|
linux_check_ptrace_features ();
|
|
|
|
|
|
|
|
|
|
/* Set the options. */
|
|
|
|
|
ptrace (PTRACE_SETOPTIONS, pid, (PTRACE_TYPE_ARG3) 0,
|
|
|
|
|
(PTRACE_TYPE_ARG4) (uintptr_t) current_ptrace_options);
|
|
|
|
|
}
|
|
|
|
|
|
2014-06-08 19:11:09 +08:00
|
|
|
/* Disable reporting of all currently supported ptrace events. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
linux_disable_event_reporting (pid_t pid)
|
|
|
|
|
{
|
|
|
|
|
/* Set the options. */
|
|
|
|
|
ptrace (PTRACE_SETOPTIONS, pid, (PTRACE_TYPE_ARG3) 0, 0);
|
|
|
|
|
}
|
|
|
|
|
|
2013-08-23 07:46:30 +08:00
|
|
|
/* Returns non-zero if PTRACE_OPTIONS is contained within
|
|
|
|
|
CURRENT_PTRACE_OPTIONS, therefore supported. Returns 0
|
|
|
|
|
otherwise. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
ptrace_supports_feature (int ptrace_options)
|
|
|
|
|
{
|
|
|
|
|
gdb_assert (current_ptrace_options >= 0);
|
|
|
|
|
|
|
|
|
|
return ((current_ptrace_options & ptrace_options) == ptrace_options);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Returns non-zero if PTRACE_EVENT_FORK is supported by ptrace,
|
|
|
|
|
0 otherwise. Note that if PTRACE_EVENT_FORK is supported so is
|
|
|
|
|
PTRACE_EVENT_CLONE, PTRACE_EVENT_EXEC and PTRACE_EVENT_VFORK,
|
|
|
|
|
since they were all added to the kernel at the same time. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
linux_supports_tracefork (void)
|
|
|
|
|
{
|
|
|
|
|
return ptrace_supports_feature (PTRACE_O_TRACEFORK);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Returns non-zero if PTRACE_EVENT_CLONE is supported by ptrace,
|
|
|
|
|
0 otherwise. Note that if PTRACE_EVENT_CLONE is supported so is
|
|
|
|
|
PTRACE_EVENT_FORK, PTRACE_EVENT_EXEC and PTRACE_EVENT_VFORK,
|
|
|
|
|
since they were all added to the kernel at the same time. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
linux_supports_traceclone (void)
|
|
|
|
|
{
|
|
|
|
|
return ptrace_supports_feature (PTRACE_O_TRACECLONE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Returns non-zero if PTRACE_O_TRACEVFORKDONE is supported by
|
|
|
|
|
ptrace, 0 otherwise. */
|
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|
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|
|
int
|
|
|
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|
linux_supports_tracevforkdone (void)
|
|
|
|
|
{
|
|
|
|
|
return ptrace_supports_feature (PTRACE_O_TRACEVFORKDONE);
|
|
|
|
|
}
|
|
|
|
|
|
|
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|
|
/* Returns non-zero if PTRACE_O_TRACESYSGOOD is supported by ptrace,
|
|
|
|
|
0 otherwise. */
|
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|
|
|
|
|
|
|
|
int
|
|
|
|
|
linux_supports_tracesysgood (void)
|
|
|
|
|
{
|
|
|
|
|
return ptrace_supports_feature (PTRACE_O_TRACESYSGOOD);
|
|
|
|
|
}
|
|
|
|
|
|
2012-07-07 20:13:57 +08:00
|
|
|
/* Display possible problems on this system. Display them only once per GDB
|
|
|
|
|
execution. */
|
|
|
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|
|
|
|
|
|
void
|
|
|
|
|
linux_ptrace_init_warnings (void)
|
|
|
|
|
{
|
|
|
|
|
static int warned = 0;
|
|
|
|
|
|
|
|
|
|
if (warned)
|
|
|
|
|
return;
|
|
|
|
|
warned = 1;
|
|
|
|
|
|
|
|
|
|
linux_ptrace_test_ret_to_nx ();
|
|
|
|
|
}
|
