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2019-11-01Move check for strerror_r to common.m4 where it belongsChristian Biesinger3-3/+8
gdb/ChangeLog: 2019-11-01 Christian Biesinger <cbiesinger@google.com> * configure: Regenerate. * configure.ac: Remove check for strerror_r. * gdbsupport/common.m4: Check for strerror_r. gdb/gdbserver/ChangeLog: 2019-11-01 Christian Biesinger <cbiesinger@google.com> * configure: Regenerate. * configure.ac: Remove check for strerror_r. Change-Id: Ibc290c3f84b1db23e998cffdbe2c1f97651d2a8d
2019-10-31Also check for strerror_r in gdbserverChristian Biesinger4-2/+11
I forgot to do this in b231e86ac9608056ea837e24d42a878927f5787a Since safe_strerror is in gdbsupport, gdbserver also needs to check for strerror_r, although it's less critical since gdbserver does not use threads as much. gdb/gdbserver/ChangeLog: 2019-10-31 Christian Biesinger <cbiesinger@google.com> * config.in: Regenerate. * configure: Regenerate. * configure.ac: Also check for strerror_r. Change-Id: I6a67c8543cd7a28d6dc94f5986f56abcb55727fe
2019-10-31Convert int to bool in agent.cChristian Biesinger2-1/+4
Also moves an int declaration inside the for loop. Code cleanup, no change in behavior intended. gdb/ChangeLog: 2019-10-31 Christian Biesinger <cbiesinger@google.com> * gdbsupport/agent.c (debug_agent): Change type to bool. (use_agent): Likewise. (all_agent_symbols_look_up): Likewise. (agent_loaded_p): Change return value to bool. (agent_look_up_symbols): Update. (agent_capability_check): Change return value to bool. * gdbsupport/agent.h (agent_loaded_p): Likewise. (debug_agent): Change type to bool. (use_agent): Likewise. (agent_capability_check): Change return value to bool. gdb/gdbserver/ChangeLog: 2019-10-31 Christian Biesinger <cbiesinger@google.com> * ax.h (debug_agent): Remove duplicate declaration. Change-Id: Icb28a65fcc8c7108bcd59287e6be66bf56f8ccb5
2019-10-26[gdb] Fix more typos in comments (2)Tom de Vries10-14/+26
Fix typos in comments. NFC. Tested on x86_64-linux. gdb/ChangeLog: 2019-10-26 Tom de Vries <tdevries@suse.de> * aarch64-linux-tdep.c: Fix typos in comments. * aarch64-tdep.c: Same. * ada-lang.c: Same. * amd64-nat.c: Same. * arc-tdep.c: Same. * arch/aarch64-insn.c: Same. * block.c: Same. * breakpoint.h: Same. * btrace.h: Same. * c-varobj.c: Same. * cli/cli-decode.c: Same. * cli/cli-script.c: Same. * cli/cli-utils.h: Same. * coff-pe-read.c: Same. * coffread.c: Same. * compile/compile-cplus-symbols.c: Same. * compile/compile-object-run.c: Same. * completer.c: Same. * corelow.c: Same. * cp-support.c: Same. * demangle.c: Same. * dwarf-index-write.c: Same. * dwarf2-frame.c: Same. * dwarf2-frame.h: Same. * eval.c: Same. * frame-base.h: Same. * frame.h: Same. * gdbcmd.h: Same. * gdbtypes.h: Same. * gnu-nat.c: Same. * guile/scm-objfile.c: Same. * i386-tdep.c: Same. * i386-tdep.h: Same. * infcall.c: Same. * infcall.h: Same. * linux-nat.c: Same. * m68k-tdep.c: Same. * macroexp.c: Same. * memattr.c: Same. * mi/mi-cmd-disas.c: Same. * mi/mi-getopt.h: Same. * mi/mi-main.c: Same. * minsyms.c: Same. * nat/aarch64-sve-linux-sigcontext.h: Same. * objfiles.h: Same. * ppc-linux-nat.c: Same. * ppc-linux-tdep.c: Same. * ppc-tdep.h: Same. * progspace.h: Same. * prologue-value.h: Same. * python/py-evtregistry.c: Same. * python/py-instruction.h: Same. * record-btrace.c: Same. * record-full.c: Same. * remote.c: Same. * rs6000-tdep.c: Same. * ser-tcp.c: Same. * sol-thread.c: Same. * sparc-sol2-tdep.c: Same. * sparc64-tdep.c: Same. * stabsread.c: Same. * symfile.c: Same. * symtab.h: Same. * target.c: Same. * tracepoint.c: Same. * tui/tui-data.h: Same. * tui/tui-io.c: Same. * tui/tui-win.c: Same. * tui/tui.c: Same. * unittests/rsp-low-selftests.c: Same. * user-regs.h: Same. * utils.c: Same. * utils.h: Same. * valarith.c: Same. * valops.c: Same. * valprint.c: Same. * valprint.h: Same. * value.c: Same. * value.h: Same. * varobj.c: Same. * x86-nat.h: Same. * xtensa-tdep.c: Same. gdb/gdbserver/ChangeLog: 2019-10-26 Tom de Vries <tdevries@suse.de> * linux-aarch64-low.c: Fix typos in comments. * linux-arm-low.c: Same. * linux-low.c: Same. * linux-ppc-low.c: Same. * proc-service.c: Same. * regcache.h: Same. * server.c: Same. * tracepoint.c: Same. * win32-low.c: Same. gdb/stubs/ChangeLog: 2019-10-26 Tom de Vries <tdevries@suse.de> * ia64vms-stub.c: Fix typos in comments. * m32r-stub.c: Same. * m68k-stub.c: Same. * sh-stub.c: Same. gdb/testsuite/ChangeLog: 2019-10-26 Tom de Vries <tdevries@suse.de> * gdb.base/bigcore.c: Fix typos in comments. * gdb.base/ctf-ptype.c: Same. * gdb.base/long_long.c: Same. * gdb.dwarf2/dw2-op-out-param.S: Same. * gdb.python/py-evthreads.c: Same. * gdb.reverse/i387-stack-reverse.c: Same. * gdb.trace/tfile.c: Same. * lib/compiler.c: Same. * lib/compiler.cc: Same. Change-Id: I8573d84a577894270179ae30f46c48d806fc1beb
2019-10-25gdbserver does not need xstrdupTom Tromey2-12/+4
gdbserver has its own implementation of xstrdup. However, because gdbserver links against libiberty now, I think this is not needed. This patch removes it. gdb/gdbserver/ChangeLog 2019-10-25 Tom Tromey <tromey@adacore.com> * utils.c (xstrdup): Remove. Change-Id: I2aa56d18d0f9af8e70a00dff431d2fda5705a5d5
2019-10-23Check for sigprocmask in common.m4Tom Tromey3-1/+9
I noticed that gdbsupport uses HAVE_SIGPROCMASK, but common.m4 does not check for it. This means that gdbserver may not compile some gdbsupport code properly. This patch fixes this error. gdb/ChangeLog 2019-10-23 Tom Tromey <tom@tromey.com> * configure: Rebuild. * configure.ac: Don't check for sigprocmask. * gdbsupport/common.m4 (GDB_AC_COMMON): Check for sigprocmask. gdb/gdbserver/ChangeLog 2019-10-23 Tom Tromey <tom@tromey.com> * configure, config.in: Rebuild. Change-Id: I2c0a4dd2c376507b9483b38707a242382faa8163
2019-10-23Use m4_include, not sinclude in .m4 filesTom Tromey2-5/+10
Pedro pointed out that sinclude does not error if a file is missing. This patch changes gdb to only use m4_include, which seems more correct. gdb/ChangeLog 2019-10-23 Tom Tromey <tom@tromey.com> * configure: Rebuild. * acinclude.m4: Use m4_include, not sinclude. gdb/gdbserver/ChangeLog 2019-10-23 Tom Tromey <tom@tromey.com> * configure: Rebuild. * acinclude.m4: Use m4_include, not sinclude. gdb/testsuite/ChangeLog 2019-10-23 Tom Tromey <tom@tromey.com> * configure: Rebuild. * aclocal.m4: Use m4_include, not sinclude. Change-Id: I970362e0af7875f9f72796401126acf0ff6dba11
2019-10-17Fix creation of stamp-h by gdb's configure scriptTom Tromey4-14/+13
I happened to notice that "make" would always print: CONFIG_HEADERS=config.h:config.in \ CONFIG_COMMANDS="default depdir" \ CONFIG_FILES= \ CONFIG_LINKS= \ /bin/sh config.status config.status: creating config.h config.status: config.h is unchanged on every rebuild. This seems to have changed due to an autoconf upgrade at some point in the past. In the autoconf gdb uses now, it works to use AC_CONFIG_HEADERS and then create the stamp file via the "commands" argument. This patch also fixes up Makefile.in to use the new-style config.status invocation. It's no longer necessary to pass the output file names via environment variables. gdb/ChangeLog 2019-10-17 Tom Tromey <tromey@adacore.com> * configure: Rebuild. * configure.ac: Use AC_CONFIG_HEADERS. Create stamp-h there, not in AC_CONFIG_FILES invocation. * Makefile.in (Makefile, data-directory/Makefile, stamp-h): Use new-style config.status invocation. gdb/gdbserver/ChangeLog 2019-10-17 Tom Tromey <tromey@adacore.com> * configure: Rebuild. * configure.ac: Use AC_CONFIG_HEADERS. Create stamp-h there, not in AC_CONFIG_FILES invocation. * Makefile.in (stamp-h, Makefile): Use new-style config.status invocation. Change-Id: Ia0530d1c5b9756812d29ddb8dc1062326155e61e
2019-10-16Create xml-builtin.h to declare xml_builtinsChristian Biesinger2-1/+8
xml-builtin.c only has character arrays and no dependencies, so this creates a simple header file for that purpose so that gdbserver can include that instead of re-declaring xml_builtin. Despite the name, feature_to_c.sh is already specific to xml_builtins (it hardcodes the variable name), so making it always output the include for xml-builtin.h seems fine. gdb/ChangeLog: 2019-10-16 Christian Biesinger <cbiesinger@google.com> * Makefile.in: Add xml-builtin.h. * features/feature_to_c.sh: Add an include for xml-builtin.h to ensure that the compiler checks that the types match. * xml-builtin.h: New file. * xml-support.c (fetch_xml_builtin): Add missing const. * xml-support.h: Remove declaration of xml_builtins. gdb/gdbserver/ChangeLog: 2019-10-16 Christian Biesinger <cbiesinger@google.com> * server.c: Include xml-builtin.h. (get_xml_features): Don't declare xml_builtins here. Change-Id: I806ef0851c43ead90b545a11794e41f5e5178436
2019-10-15gdb/gdbserver: Remove reference to vec-ipa.oAndrew Burgess2-1/+4
This comit: commit 0dc327459b19e6765c8fe80957f5c8620611628e Date: Mon Oct 7 16:38:53 2019 +0100 gdb: Remove vec.{c,h} and update code to not include vec.h Broke the GDB build due to leaving a reference to vec-ipa.o in the Makefile.in, this file is built from vec.c which has been removed. I got away with this as I had an old version of the vec-ipa.o file still in my build tree. With this commit in place a clean build now completed successfully. gdb/ChangeLog: * Makefile.in: Remove references to vec-ipa.o. Change-Id: I4cf55951158dd7ee8f60cd054311a7c367e1d7bf
2019-10-15gdb: Remove vec.{c,h} and update code to not include vec.hAndrew Burgess2-2/+4
Removes vec.c and vec.h from the source tree, and remove all the remaining includes of vec.h. There should be no user visible changes after this commit. I did have a few issues rebuilding GDB after applying this patch due to cached dependencies, I found that running this command in the build directory resolved my build issues without requiring a 'make clean': rm -fr gdb/gdbserver/gdbsupport/.deps/ gdb/ChangeLog: * Makefile.in: Remove references to vec.h and vec.c. * aarch64-tdep.c: No longer include vec.h. * ada-lang.c: Likewise. * ada-lang.h: Likewise. * arm-tdep.c: Likewise. * ax.h: Likewise. * breakpoint.h: Likewise. * charset.c: Likewise. * cp-support.h: Likewise. * dtrace-probe.c: Likewise. * dwarf2read.c: Likewise. * extension.h: Likewise. * gdb_bfd.c: Likewise. * gdbsupport/gdb_vecs.h: Likewise. * gdbsupport/vec.c: Remove. * gdbsupport/vec.h: Remove. * gdbthread.h: Likewise. * guile/scm-type.c: Likewise. * inline-frame.c: Likewise. * machoread.c: Likewise. * memattr.c: Likewise. * memrange.h: Likewise. * namespace.h: Likewise. * nat/linux-btrace.h: Likewise. * osdata.c: Likewise. * parser-defs.h: Likewise. * progspace.h: Likewise. * python/py-type.c: Likewise. * record-btrace.c: Likewise. * rust-exp.y: Likewise. * solib-target.c: Likewise. * stap-probe.c: Likewise. * target-descriptions.c: Likewise. * target-memory.c: Likewise. * target.h: Likewise. * varobj.c: Likewise. * varobj.h: Likewise. * xml-support.h: Likewise. gdb/gdbserver/ChangeLog: * Makefile.in: Remove references to vec.c. Change-Id: I0c91d7170bf1b5e992a387fcd9fe4f2abe343bb5
2019-10-02Convert boolean globals in server.c to boolChristian Biesinger4-39/+67
Converts the int globals to bool. gdb/gdbserver/ChangeLog: 2019-10-02 Christian Biesinger <cbiesinger@google.com> * server.c (server_waiting): Change to bool. (extended_protocol): Likewise. (response_needed): Likewise. (exit_requested): Likewise. (run_once): Likewise. (report_no_resumed): Likewise. (non_stop): Likewise. (disable_packet_vCont): Likewise. (disable_packet_Tthread): Likewise. (disable_packet_qC): Likewise. (disable_packet_qfThreadInfo): Likewise. (handle_general_set): Update. (handle_detach): Update. (handle_monitor_command): Update. (handle_query): Update. (captured_main): Update. (process_serial_event): Update. * server.h (server_waiting): Change to bool. (disable_packet_vCont): Likewise. (disable_packet_Tthread): Likewise. (disable_packet_qC): Likewise. (disable_packet_qfThreadInfo): Likewise. (run_once): Likewise. (non_stop): Likewise. * target.c (target_stop_and_wait): Update.
2019-10-02Fix type of startup_with_shell in gdbserverTom Tromey3-6/+8
startup_with_shell was changed to be of "bool" type, but I noticed that the definition in gdbserver disagreed. This disagreement caused some regressions on a big-endian machine. This patch removes the redundant declaration and definition of startup_with_shell and ensures that such clashes will be diagnosed. This moves the declaration to common-inferior.h, and introduces a new common-inferior.c, as suggested by Pedro. gdb/ChangeLog 2019-10-02 Tom Tromey <tromey@adacore.com> * Makefile.in (COMMON_SFILES): Add common-inferior.c. * gdbsupport/common-inferior.c: New file. * infcmd.c (startup_with_shell): Don't define. * nat/fork-inferior.h (startup_with_shell): Don't declare. * gdbsupport/common-inferior.h (startup_with_shell): Declare. * inferior.h (startup_with_shell): Don't declare. gdb/gdbserver/ChangeLog 2019-10-02 Tom Tromey <tromey@adacore.com> * Makefile.in (SFILES): Add common-inferior.c. (OBS): Add common-inferior.o. * server.c (startup_with_shell): Don't define.
2019-10-02gdb: Remove a VEC from gdbsupport/btrace-common.hAndrew Burgess2-6/+7
Converts a VEC into a std::vector in gdbsupport/btrace-common.h. This commit just performs a mechanical conversion and doesn't do any refactoring. One consequence of this is that the std::vector must actually be a pointer to std::vector as it is placed within a union. It might be possible in future to refactor to a class hierarchy and remove the need for a union, but I'd rather have that be a separate change to make it easier to see the evolution of the code. gdb/ChangeLog: * btrace.c (btrace_compute_ftrace_bts): Update for std::vector, make accesses into the vector constant references. (btrace_add_pc): Update for std::vector. (btrace_stitch_bts): Likewise. (parse_xml_btrace_block): Likewise. (btrace_maint_update_packets): Likewise. (btrace_maint_print_packets): Likewise. (maint_info_btrace_cmd): Likewise. * gdbsupport/btrace-common.c (btrace_data::fini): Update for std::vector. (btrace_data::empty): Likewise. (btrace_data_append): Likewise. * gdbsupport/btrace-common.h: Remove use of DEF_VEC_O. (typedef btrace_block_s): Delete. (struct btrace_block): Add constructor. (struct btrace_data_bts) <blocks>: Change to std::vector. * nat/linux-btrace.c (perf_event_read_bts): Update for std::vector. (linux_read_bts): Likewise. gdb/gdbserver/ChangeLog: * linux-low.c (linux_low_read_btrace): Update for change to std::vector.
2019-09-26Revert "Improve ptrace-error detection on Linux targets"Sergio Durigan Junior4-33/+6
This reverts commit 381beca6146ac68b57edf47d28cdb335fbd11635. The patch hasn't been fully reviewed yet, and Pedro would like to see more fixes.
2019-09-26Improve ptrace-error detection on Linux targetsSergio Durigan Junior4-6/+33
In Fedora GDB, we carry the following patch: https://src.fedoraproject.org/rpms/gdb/blob/8ac06474ff1e2aa4920d14e0666b083eeaca8952/f/gdb-attach-fail-reasons-5of5.patch Its purpose is to try to detect a specific scenario where SELinux's 'deny_ptrace' option is enabled, which prevents GDB from ptrace'ing in order to debug the inferior (PTRACE_ATTACH and PTRACE_TRACEME will fail with EACCES in this case). I like the idea of improving error detection and providing more information to the user (a simple "Permission denied" can be really frustrating), but I don't fully agree with the way the patch was implemented: it makes GDB link against libselinux only for the sake of consulting the 'deny_ptrace' setting, and then prints a warning if ptrace failed and this setting is on. My first thought (and attempt) was to make GDB print a generic warning when a ptrace error happened; this message would just point the user to our documentation, where she could find more information about possible causes for the error (and try to diagnose/fix the problem). This proved to be too simple, and I was convinced that it is actually a good idea to go the extra kilometre and try to pinpoint the specific problem (or problems) preventing ptrace from working, as well as provide useful suggestions on how the user can fix things. Here is the patch I came up with. It implements a new function, 'linux_ptrace_restricted_fail_reason', which does a few things to check what's wrong with ptrace: - It dlopen's "libselinux.so.1" and checks if the "deny_ptrace" option is enabled. - It reads the contents of "/proc/sys/kernel/yama/ptrace_scope" and checks if it's different than 0. For each of these checks, if it succeeds, the user will see a message informing about the restriction in place, and how it can be disabled. For example, if "deny_ptrace" is enabled, the user will see: # gdb /usr/bin/true ... Starting program: /usr/bin/true warning: Could not trace the inferior process. warning: ptrace: Permission denied The SELinux 'deny_ptrace' option is enabled and preventing GDB from using 'ptrace'. You can disable it by executing (as root): setsebool deny_ptrace off If you are debugging the inferior remotely, the ptrace restriction(s) need to be disabled in the target system (e.g., where GDBserver is running). During startup program exited with code 127. (gdb) In case "/proc/sys/kernel/yama/ptrace_scope" is > 0: # gdb /usr/bin/true ... Starting program: /usr/bin/true warning: Could not trace the inferior process. warning: ptrace: Operation not permitted The Linux kernel's Yama ptrace scope is in effect, which can prevent GDB from using 'ptrace'. You can disable it by executing (as root): echo 0 > /proc/sys/kernel/yama/ptrace_scope If you are debugging the inferior remotely, the ptrace restriction(s) need to be disabled in the target system (e.g., where GDBserver is running). During startup program exited with code 127. (gdb) If both restrictions are enabled, both messages will show up. This works for gdbserver as well, and actually fixes a latent bug I found: when ptrace is restricted, gdbserver would hang due to an unchecked ptrace call: # gdbserver :9988 /usr/bin/true gdbserver: linux_ptrace_test_ret_to_nx: Cannot PTRACE_TRACEME: Operation not permitted gdbserver: linux_ptrace_test_ret_to_nx: status 256 is not WIFSTOPPED! gdbserver: linux_ptrace_test_ret_to_nx: failed to kill child pid 2668100 No such process [ Here you would have to issue a C-c ] Now, you will see: # gdbserver :9988 /usr/bin/true gdbserver: linux_ptrace_test_ret_to_nx: Cannot PTRACE_TRACEME: Permission denied gdbserver: linux_ptrace_test_ret_to_nx: status 256 is not WIFSTOPPED! gdbserver: linux_ptrace_test_ret_to_nx: failed to kill child pid 2766868 No such process gdbserver: Could not trace the inferior process. gdbserver: ptrace: Permission denied The SELinux 'deny_ptrace' option is enabled and preventing GDB from using 'ptrace'. You can disable it by executing (as root): setsebool deny_ptrace off If you are debugging the inferior remotely, the ptrace restriction(s) need to be disabled in the target system (e.g., where GDBserver is running). # (I decided to keep all the other messages, even though I find them a bit distracting). If GDB can't determine the cause for the failure, it will still print the generic error message which tells the user to check our documentation: There might be restrictions preventing ptrace from working. Please see the appendix "Linux kernel ptrace restrictions" in the GDB documentation for more details. If you are debugging the inferior remotely, the ptrace restriction(s) need to be disabled in the target system (e.g., where GDBserver is running). This means that the patch expands our documentation and creates a new appendix section named "Linux kernel ptrace restrictions", with sub-sections for each possible restriction that might be in place. Notice how, on every message, we instruct the user to "do the right thing" if gdbserver is being used. This is because if the user started gdbserver *before* any ptrace restriction was in place, and then, for some reason, one or more restrictions get enabled, then the error message will be displayed both on gdbserver *and* on the connected GDB. Since the user will be piloting GDB, it's important to explicitly say that the ptrace restrictions are enabled in the target, where gdbserver is running. The current list of possible restrictions is: - SELinux's 'deny_ptrace' option (detected). - YAMA's /proc/sys/kernel/yama/ptrace_scope setting (detected). - seccomp on Docker containers (I couldn't find how to detect). It's important to mention that all of this is Linux-specific; as far as I know, SELinux, YAMA and seccomp are Linux-only features. I tested this patch locally, on my Fedora 30 machine (actually, a Fedora Rawhide VM), but I'm not proposing a testcase for it because of the difficulty of writing one. WDYT? gdb/doc/ChangeLog: 2019-09-26 Sergio Durigan Junior <sergiodj@redhat.com> * gdb.texinfo (Linux kernel ptrace restrictions): New appendix section. gdb/ChangeLog: 2019-09-26 Sergio Durigan Junior <sergiodj@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> Pedro Alves <palves@redhat.com> * gdbsupport/gdb-dlfcn.h (gdb_dlopen): Update comment and mention that the function throws an error. * inf-ptrace.c (default_inf_ptrace_me_fail_reason): New function. (inf_ptrace_me_fail_reason): New variable. (inf_ptrace_me): Update call to 'trace_start_error_with_name'. * inf-ptrace.h (inf_ptrace_me_fail_reason): New variable. * linux-nat.c (attach_proc_task_lwp_callback): Call 'linux_ptrace_attach_fail_reason_lwp'. (linux_nat_target::attach): Update call to 'linux_ptrace_attach_fail_reason'. (_initialize_linux_nat): Set 'inf_ptrace_me_fail_reason'. * nat/fork-inferior.c (trace_start_error_with_name): Add optional 'append' argument. * nat/fork-inferior.h (trace_start_error_with_name): Update prototype. * nat/linux-ptrace.c: Include "gdbsupport/gdb-dlfcn.h", "gdbsupport/filestuff.h" and "nat/fork-inferior.h". (selinux_ftype): New typedef. (linux_ptrace_restricted_fail_reason): New function. (linux_ptrace_attach_fail_reason_1): New function. (linux_ptrace_attach_fail_reason): Change first argument type from 'ptid_t' to 'pid_t'. Call 'linux_ptrace_attach_fail_reason_1' and 'linux_ptrace_restricted_fail_reason'. (linux_ptrace_attach_fail_reason_lwp): New function. (linux_ptrace_me_fail_reason): New function. (errno_pipe): New variable. (linux_fork_to_function): Initialize pipe before forking. (linux_child_function): Deal with errno-passing from child. Handle ptrace error. (linux_check_child_ptrace_errno): New function. (linux_check_child_ptrace_errno): Call 'linux_check_child_ptrace_errno'. * nat/linux-ptrace.h (linux_ptrace_attach_fail_reason): Update prototype. (linux_ptrace_attach_fail_reason_lwp): New prototype. (linux_ptrace_me_fail_reason): New prototype. * remote.c (extended_remote_target::attach): Handle error message passed by the server when attach fails. gdb/gdbserver/ChangeLog: 2019-09-26 Sergio Durigan Junior <sergiodj@redhat.com> Pedro Alves <palves@redhat.com> * linux-low.c (linux_ptrace_fun): Call 'linux_ptrace_me_fail_reason'. (attach_proc_task_lwp_callback): Call 'linux_ptrace_attach_fail_reason_lwp'. (linux_attach): Call 'linux_ptrace_attach_fail_reason'. * server.c (handle_v_attach): Use try..catch when calling 'attach_inferior', and send an error message to the client when needed. * thread-db.c (attach_thread): Call 'linux_ptrace_attach_fail_reason_lwp'.
2019-09-21Move declarations of debug_threads and using_threads to headerChristian Biesinger7-13/+22
Instead of declaring debug_threads and using_threads in several .c files, declare them in debug.h. gdb/gdbserver/ChangeLog: 2019-09-20 Christian Biesinger <cbiesinger@google.com> * debug.c (debug_threads): Remove comment in favor of the header. * debug.h (using_threads): Add declaration. (debug_threads): Add comment. * linux-aarch64-low.c: Include debug.h and remove declaration of debug_threads. * nto-low.c: Likewise. * remote-utils.c: Likewise. * thread-db.c: Likewise.
2019-09-20Remove Cell Broadband Engine debugging supportUlrich Weigand12-977/+49
This patch implements removal of Cell/B.E. support, including - Support for the spu-*-* target - Support for native stand-alone SPU debugging - Support for integrated debugging of combined PPU/SPU applications - Remote debugging (gdbserver) support for all the above. The patch also removes the TARGET_OBJECT_SPU target object type, as this is available only on Cell/B.E. targets, including - Native Linux support - Core file support (including core file generation) - Remote target support, including removal of the qXfer:spu:read and qXfer:spu:write remote protocal packets and associated support in gdbserver. gdb/ChangeLog 2019-09-20 Ulrich Weigand <uweigand@de.ibm.com> * NEWS: Mention that Cell/B.E. debugging support was removed. * MAINTAINERS: Remove spu target. * config/djgpp/fnchange.lst: Remove entries for removed files. * Makefile.in (ALL_TARGET_OBS): Remove solib-spu.o, spu-multiarch.o, and spu-tdep.o. (HFILES_NO_SRCDIR): Remove solib-spu.h and spu-tdep.h. (ALLDEPFILES): Remove solib-spu.c, spu-linux-nat.c, spu-multiarch.c, and spu-tdep.c. * spu-linux-nat.c: Remove file. * spu-multiarch.c: Remove file. * spu-tdep.c: Remove file. * spu-tdep.h: Remove file. * solib-spu.c: Remove file. * solib-spu.h: Remove file. * configure.host (powerpc64*-*-linux*): Remove Cell/B.E. support. * configure.nat (spu-linux): Remove. * configure.tgt (powerpc*-*-linux*): Remove solib-spu.o and solib-multiarch.o from gdb_target_obs. (spu*-*-*): Remove. * arch/ppc-linux-common.h (struct ppc_linux_features): Remove "cell" feature flag. (ppc_linux_no_features): Update. * arch/ppc-linux-common.c (ppc_linux_match_description): Remove Cell/B.E. support. * arch/ppc-linux-tdesc.h (tdesc_powerpc_cell32l): Remove declaration. (tdesc_powerpc_cell64l): Likewise. * nat/ppc-linux.h (PPC_FEATURE_CELL): Remove. * ppc-linux-nat.c (ppc_linux_nat_target::read_description): Remove Cell/B.E. support. * ppc-linux-tdep.h: Do not include "solib-spu.h" or "spu-tdep.h". Do not include "features/rs6000/powerpc-cell32l.c" or "features/rs6000/powerpc-cell64l.c". (ppc_linux_spu_section): Remove. (ppc_linux_core_read_description): Remove Cell/B.E. support. (spe_context_objfile, spe_context_lm_addr, spe_context_offset, spe_context_cache_ptid, spe_context_cache_ptid): Remove. (ppc_linux_spe_context_lookup): Remove. (ppc_linux_spe_context_inferior_created): Remove. (ppc_linux_spe_context_solib_loaded): Remove. (ppc_linux_spe_context_solib_unloaded): Remove. (ppc_linux_spe_context): Remove. (struct ppu2spu_cache): Remove. (ppu2spu_prev_arch, ppu2spu_this_id, ppu2spu_prev_register): Remove. (struct ppu2spu_data): Remove. (ppu2spu_unwind_register, ppu2spu_sniffer, ppu2spu_dealloc_cache, ppu2spu_unwind): Remove. (ppc_linux_init_abi): Remove Cell/B.E. support. * rs6000-tdep.h (rs6000_gdbarch_init): Remove Cell/B.E. support. * features/Makefile (rs6000/powerpc-cell32l-expedite): Remove. (rs6000/powerpc-cell64l-expedite): Likewise (WHICH): Remove rs6000/powerpc-cell32l and rs6000/powerpc-cell64l. (XMLTOC): Remove rs6000/powerpc-cell32l.xml and rs6000/powerpc-cell64l.xml. * features/rs6000/powerpc-cell32l.xml: Remove. * features/rs6000/powerpc-cell64l.xml: Likewise. * features/rs6000/powerpc-cell32l.c: Remove generated file. * features/rs6000/powerpc-cell64l.c: Likewise. * regformats/rs6000/powerpc-cell32l.dat: Remove generated file. * regformats/rs6000/powerpc-cell64l.dat: Likewise. * regformats/reg-spu.dat: Remove. * target.h (enum target_object): Remove TARGET_OBJECT_SPU. * corelow.c (struct spuid_list): Remove. (add_to_spuid_list): Remove. (core_target::xfer_partial): Remove support for TARGET_OBJECT_SPU. * remote.c (PACKET_qXfer_spu_read, PACKET_qXfer_spu_write): Remove. (remote_protocol_features): Remove associated entries. (_initialize_remote): No longer initialize them. (remote_target::xfer_partial): Remove support for TARGET_OBJECT_SPU. * linux-nat.c (SPUFS_MAGIC): Remove. (linux_proc_xfer_spu): Remove. (spu_enumerate_spu_ids): Remove. (linux_nat_target::xfer_partial): Remove support for TARGET_OBJECT_SPU. * linux-tdep.c (-linux_spu_make_corefile_notes): Remove. (linux_make_corefile_notes): No longer call it. * regcache.c (cooked_read_test): Remove bfd_arch_spu special case. (cooked_write_test): Likewise. gdb/doc/ChangeLog 2019-09-20 Ulrich Weigand <uweigand@de.ibm.com> * doc/gdb.texinfo (Remote Configuration): Remove documentation for qXfer:spu:read and qXfer:spu:write. (General Query Packets): Likewise. (Cell Broadband Engine SPU architecture): Remove subsection. gdb/gdbserver/ChangeLog 2019-09-20 Ulrich Weigand <uweigand@de.ibm.com> * configure.srv (ipa_ppc_linux_regobj): Remove powerpc-cell32l-ipa.o and powerpc-cell64l-ipa.o. (powerpc*-*-linux*): Remove powerpc-cell32l.o and powerpc-cell64l.o from srv_regobj. Remove rs6000/powerpc-cell32l.xml and rs6000/powerpc-cell64l.xml from srv_xmlfiles. (spu*-*-*): Remove. * spu-low.c: Remove file. * linux-ppc-low.c (INSTR_SC, NR_spu_run): Remove. (parse_spufs_run): Remove. (ppc_get_pc): Remove Cell/B.E. support. (ppc_set_pc): Likewise. (ppc_breakpoint_at): Likewise. (ppc_arch_setup): Likewise. (ppc_get_ipa_tdesc_idx): Do not handle tdesc_powerpc_cell64l or tdesc_powerpc_cell32l. (initialize_low_arch): Do not call init_registers_powerpc_cell64l or init_registers_powerpc_cell32l. * linux-ppc-ipa.c (get_ipa_tdesc): Do not handle PPC_TDESC_CELL. (initialize_low_tracepoint): Do not call init_registers_powerpc_cell64l or init_registers_powerpc_cell32l. * linux-ppc-tdesc-init.h (PPC_TDESC_CELL): Mark as unused. (init_registers_powerpc_cell32l): Remove prototype. (init_registers_powerpc_cell64l): Likewise. * target.h (struct target_ops): Remove qxfer_spu member. * server.c (handle_qxfer_spu): Remove. (qxfer_packets): Remove entry for "spu". (handle_query): No longer support qXfer:spu:read or qXfer:spu:write. * linux-low.c (SPUFS_MAGIC): Remove. (spu_enumerate_spu_ids): Remove. (linux_qxfer_spu): Remove. (linux_target_ops): Remove qxfer_spu member. * lynx-low.c (lynx_target_ops): Remove qxfer_spu member. * nto-low.c (nto_target_ops): Remove qxfer_spu member. * win32-low.c (win32_target_ops): Remove qxfer_spu member. gdb/testsuite/ChangeLog 2019-09-20 Ulrich Weigand <uweigand@de.ibm.com> * gdb.arch/spu-info.exp: Remove file. * gdb.arch/spu-info.c: Remove file. * gdb.arch/spu-ls.exp: Remove file. * gdb.arch/spu-ls.c: Remove file. * gdb.asm/asm-source.exp: Remove support for spu*-*-*. * gdb.asm/spu.inc: Remove file. * gdb.base/dump.exp: Remove support for spu*-*-*. * gdb.base/stack-checking.exp: Likewise. * gdb.base/overlays.exp: Likewise. * gdb.base/ovlymgr.c: Likewise. * gdb.base/spu.ld: Remove file. * gdb.cp/bs15503.exp: Remove support for spu*-*-*. * gdb.cp/cpexprs.exp: Likewise. * gdb.cp/exception.exp: Likewise. * gdb.cp/gdb2495.exp: Likewise. * gdb.cp/mb-templates.exp: Likewise. * gdb.cp/pr9167.exp: Likewise. * gdb.cp/userdef.exp: Likewise. * gdb.xml/tdesc-regs.exp: Remove support for spu*-*-*. * gdb.cell: Remove directory. * lib/cell.exp: Remove file.
2019-08-23Move gdb-dlfcn.[ch] to gdbsupport/Sergio Durigan Junior4-1/+13
I need to use 'gdb_dlopen' inside 'gdbsupport/', but it's not yet supported there. This commit moves 'gdb-dlfcn.[ch]' to 'gdbsupport/', which makes it available also on gdbserver. gdb/ChangeLog: 2019-08-23 Sergio Durigan Junior <sergiodj@redhat.com> * configure.ac: Don't check for 'dlfcn.h' (moved to gdbsupport/common.m4). * Makefile.in (COMMON_SFILES): Move 'gdb-dlfcn.c' to 'gdbsupport/'. (HFILES_NO_SRCDIR): Likewise, for 'gdb-dlfcn.h'. * compile/compile-c-support.c: Include 'gdbsupport/gdb-dlfcn.h'. * gdbsupport/common.m4: Check for 'dlfcn.h'. * gdb-dlfcn.c: Move to... * gdbsupport/gdb-dlfcn.c: ... here. * gdb-dlfcn.h: Move to... * gdbsupport/gdb-dlfcn.h: ... here. gdb/gdbserver/ChangeLog: 2019-08-23 Sergio Durigan Junior <sergiodj@redhat.com> * Makefile.in (SFILES): Add 'gdbsupport/gdb-dlfcn.c'. (OBS): Add 'gdbsupport/gdb-dlfcn.o'. * config.in: Regenerate. * configure: Regenerate.
2019-08-15Use gdb::byte_vector in target_write_memoryTom Tromey2-1/+6
Pedro pointed out that target_write_memory should use gdb::byte_vector rather than std::vector<unsigned char>. gdb/gdbserver/ChangeLog 2019-08-15 Tom Tromey <tromey@adacore.com> * target.c (target_write_memory): Use gdb::byte_vector.
2019-08-15Replace write_inferior_memory with target_write_memoryTom Tromey12-68/+89
target_write_memory is just a simple wrapper for write_inferior_memory. Because target_write_memory is needed for gdbsupport, and because gdb uses the name "target_write_memory" everywhere, this patch renames write_inferior_memory and removes the wrapper. I think this brings gdb and gdbserver slightly more in sync. gdb/gdbserver/ChangeLog 2019-08-15 Tom Tromey <tromey@adacore.com> * tracepoint.c (write_inferior_data_pointer) (write_inferior_integer, write_inferior_int8) (write_inferior_uinteger, m_tracepoint_action_download) (r_tracepoint_action_download, x_tracepoint_action_download) (l_tracepoint_action_download, clear_inferior_trace_buffer) (download_agent_expr, download_tracepoint_1) (download_trace_state_variables, upload_fast_traceframes): Update. * server.c (gdb_write_memory): Update. * remote-utils.c (relocate_instruction): Update. * proc-service.c (ps_pdwrite): Update. * mem-break.c (remove_memory_breakpoint) (delete_fast_tracepoint_jump, set_fast_tracepoint_jump) (uninsert_fast_tracepoint_jumps_at) (reinsert_fast_tracepoint_jumps_at): Update. * linux-x86-low.c (append_insns) (i386_install_fast_tracepoint_jump_pad) (amd64_write_goto_address, i386_write_goto_address): Update. * linux-s390-low.c (append_insns, s390_write_goto_address): Update. * linux-ppc-low.c (ppc_relocate_instruction) (ppc_install_fast_tracepoint_jump_pad, emit_insns) (ppc_write_goto_address): Update. * linux-aarch64-low.c (append_insns): Update. * target.h (struct target_ops): Update. (write_inferior_memory): Don't declare. * target.c (target_write_memory): Rename from write_inferior_memory. Remove old target_write_memory.
2019-08-15Simplify write_inferior_memoryTom Tromey2-17/+9
gdbserver's write_inferior_memory uses a static variable to avoid memory leaks, and has a comment referring to the lack of cleanups. This patch removes this comment and the code in favor of a straightforward use of std::vector. gdb/gdbserver/ChangeLog 2019-08-15 Tom Tromey <tromey@adacore.com> * target.c (write_inferior_memory): Use std::vector.
2019-08-06[PR build/24886] disable glibc mcheck supportFrank Ch. Eigler5-128/+53
This patch drops gdb's configury support for glibc's mcheck function. It has been observed to cause false abort()s, because it is thread-unsafe yet interposes every malloc/free operation. So if any library transitively used by gdb also uses threads, then these functions can easily corrupt their own checking data. These days, gcc ASAN and valgrind provide high quality checking, and mcheck is apparently itself being slowly deprecated. So, let's stop linking to it. Attached patch drops the autoconf/Makefile machinery for both gdb and gdbserver. No testsuite-visible impact. IMHO not worth mentioning in NEWS. See also: https://sourceware.org/bugzilla/show_bug.cgi?id=9939 gdb/ChangeLog PR build/24886 * configure.ac: Drop enable-libmcheck support. * configure, config.in: Rebuild. * libmcheck.m4: Remove. * acinclude.m4: Don't include it. * Makefile.in: Don't distribute it. * top.c (print_gdb_configuration): Don't mention it. gdb/gdbserver/ChangeLog PR build/24886 * configure.ac: Drop enable-libmcheck support. * configure, config.in: Rebuild. * acinclude.m4: Don't include it.
2019-07-19Arm: Remove unused feature files and testsAlan Hayward2-8/+4
Remove the xml tests. Now that it has been proven the new descriptions are identical, there is no need to keep testing that. Also, it would prevent the old xml files from being removed. Remove the old xml files from gdbserver and delete them. gdb/ChangeLog: * arm-tdep.c (_initialize_arm_tdep): Remove xml tests. * features/arm/arm-with-iwmmxt.c: Remove. * features/arm/arm-with-iwmmxt.xml: Remove. * features/arm/arm-with-m-fpa-layout.c: Remove. * features/arm/arm-with-m-fpa-layout.xml: Remove. * features/arm/arm-with-m-vfp-d16.c: Remove. * features/arm/arm-with-m-vfp-d16.xml: Remove. * features/arm/arm-with-m.c: Remove. * features/arm/arm-with-m.xml: Remove. * features/arm/arm-with-neon.c: Remove. * features/arm/arm-with-neon.xml: Remove. * features/arm/arm-with-vfpv2.c: Remove. * features/arm/arm-with-vfpv2.xml: Remove. * features/arm/arm-with-vfpv3.c: Remove. * features/arm/arm-with-vfpv3.xml: Remove. gdb/gdbserver/ChangeLog: 2019-07-05 Alan Hayward <alan.hayward@arm.com> * configure.srv: Remove Arm xml files.
2019-07-19Arm: Use read_description funcs in gdbserverAlan Hayward10-53/+232
Switch gdbserver over to using feature target descriptions. Add a function for determining the type of a given target description, and use where required. gdb/gdbserver/ChangeLog: * configure.srv: Add new files. Remove xml generated files. * linux-aarch32-low.c (initialize_low_arch_aarch32): Don't init registers. * linux-aarch32-low.h (tdesc_arm_with_neon): Remove. * linux-aarch32-tdesc.c: New file. * linux-aarch32-tdesc.h: New file. * linux-aarch64-low.c (aarch64_arch_setup): Call aarch32_linux_read_description. * linux-arm-low.c (init_registers_arm, tdesc_arm) (init_registers_arm_with_iwmmxt, tdesc_arm_with_iwmmxt) (init_registers_arm_with_vfpv2, tdesc_arm_with_vfpv2) (init_registers_arm_with_vfpv3, tdesc_arm_with_vfpv3): Remove. (arm_fill_wmmxregset, arm_store_wmmxregset, arm_fill_vfpregset) (arm_store_vfpregset): Call arm_linux_get_tdesc_fp_type. (arm_read_description): Call arm_linux_read_description. (initialize_low_arch): Don't init registers. * linux-arm-tdesc.c: New file. * linux-arm-tdesc.h: New file.
2019-07-10Arm: Minor style cleanupsAlan Hayward2-29/+24
*When reading a target description, do the ptrace check before picking the target description. *In wmmxregset functions, declare the counter inside the for. *Call arm_linux_init_hwbp_cap from in arm_arch_setup - it doesn't belong in arm_read_description. gdb/ChangeLog: * arm-linux-nat.c (arm_linux_nat_target::read_description): Check ptrace earlier, gdb/gdbserver/ChangeLog: * linux-arm-low.c (arm_fill_wmmxregset, arm_store_wmmxregset): Move counter inside for. (arm_read_description): Check ptrace earlier. (arm_arch_setup): Call arm_linux_init_hwbp_cap here.
2019-07-09Rename common to gdbsupportTom Tromey40-175/+194
This is the next patch in the ongoing series to move gdbsever to the top level. This patch just renames the "common" directory. The idea is to do this move in two parts: first rename the directory (this patch), then move the directory to the top. This approach makes the patches a bit more tractable. I chose the name "gdbsupport" for the directory. However, as this patch was largely written by sed, we could pick a new name without too much difficulty. Tested by the buildbot. gdb/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * contrib/ari/gdb_ari.sh: Change common to gdbsupport. * configure: Rebuild. * configure.ac: Change common to gdbsupport. * gdbsupport: Rename from common. * acinclude.m4: Change common to gdbsupport. * Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES) (HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to gdbsupport. * aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c, amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c, amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c, amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c, amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c, arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c, arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c, arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c, arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c, auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h, btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c, charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c, cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c, coff-pe-read.c, command.h, compile/compile-c-support.c, compile/compile-c.h, compile/compile-cplus-symbols.c, compile/compile-cplus-types.c, compile/compile-cplus.h, compile/compile-loc2c.c, compile/compile.c, completer.c, completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c, cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c, darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c, disasm.h, dtrace-probe.c, dwarf-index-cache.c, dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c, dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c, event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c, features/aarch64-core.c, features/aarch64-fpu.c, features/aarch64-pauth.c, features/aarch64-sve.c, features/i386/32bit-avx.c, features/i386/32bit-avx512.c, features/i386/32bit-core.c, features/i386/32bit-linux.c, features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c, features/i386/32bit-segments.c, features/i386/32bit-sse.c, features/i386/64bit-avx.c, features/i386/64bit-avx512.c, features/i386/64bit-core.c, features/i386/64bit-linux.c, features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c, features/i386/64bit-segments.c, features/i386/64bit-sse.c, features/i386/x32-core.c, features/riscv/32bit-cpu.c, features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c, features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c, features/riscv/64bit-fpu.c, features/tic6x-c6xp.c, features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h, findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h, gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c, gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c, go32-nat.c, guile/guile.c, guile/scm-ports.c, guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c, i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c, i386-linux-tdep.c, i386-tdep.c, i387-tdep.c, ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c, inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h, inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h, inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c, linux-tdep.c, linux-thread-db.c, location.c, machoread.c, macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h, mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h, minsyms.c, mips-linux-tdep.c, namespace.h, nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h, nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c, nat/amd64-linux-siginfo.c, nat/fork-inferior.c, nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c, nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c, nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h, nat/linux-waitpid.c, nat/mips-linux-watch.c, nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c, nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c, nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h, obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c, parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c, procfs.c, producer.c, progspace.h, psymtab.h, python/py-framefilter.c, python/py-inferior.c, python/py-ref.h, python/py-type.c, python/python.c, record-btrace.c, record-full.c, record.c, record.h, regcache-dump.c, regcache.c, regcache.h, remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c, riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c, selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c, ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c, source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c, stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h, symtab.c, symtab.h, target-descriptions.c, target-descriptions.h, target-memory.c, target.c, target.h, target/waitstatus.c, target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c, top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c, tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h, unittests/array-view-selftests.c, unittests/child-path-selftests.c, unittests/cli-utils-selftests.c, unittests/common-utils-selftests.c, unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c, unittests/format_pieces-selftests.c, unittests/function-view-selftests.c, unittests/lookup_name_info-selftests.c, unittests/memory-map-selftests.c, unittests/memrange-selftests.c, unittests/mkdir-recursive-selftests.c, unittests/observable-selftests.c, unittests/offset-type-selftests.c, unittests/optional-selftests.c, unittests/parse-connection-spec-selftests.c, unittests/ptid-selftests.c, unittests/rsp-low-selftests.c, unittests/scoped_fd-selftests.c, unittests/scoped_mmap-selftests.c, unittests/scoped_restore-selftests.c, unittests/string_view-selftests.c, unittests/style-selftests.c, unittests/tracepoint-selftests.c, unittests/unpack-selftests.c, unittests/utils-selftests.c, unittests/xml-utils-selftests.c, utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c, value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c, xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c, xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport. gdb/gdbserver/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * configure: Rebuild. * configure.ac: Change common to gdbsupport. * acinclude.m4: Change common to gdbsupport. * Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS) (version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change common to gdbsupport. * ax.c, event-loop.c, fork-child.c, gdb_proc_service.h, gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c, inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c, linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c, linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c, linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h, nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c, server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h, thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change common to gdbsupport.
2019-07-04Arm/AArch64: Use a single set of Arm register set size definesAlan Hayward3-10/+14
Both targets were using a mixture of defines and hardcoded values. Add a standard set in arch/arm.h and use throughout, ensuring that none of the existing sizes change. No functionality changes. gdb/ChangeLog: * aarch32-linux-nat.h (VFP_REGS_SIZE): Remove define. * aarch64-linux-nat.c (fetch_fpregs_from_thread) (store_fpregs_to_thread) (aarch64_linux_nat_target::read_description): Use ARM_VFP3_REGS_SIZE. * arch/arm.h (IWMMXT_VEC_REGISTER_SIZE, ARM_CORE_REGS_SIZE) (ARM_FP_REGS_SIZE, ARM_VFP2_REGS_SIZE, ARM_VFP3_REGS_SIZE) (IWMMXT_REGS_SIZE): Add define. * arm-linux-nat.c (IWMMXT_REGS_SIZE): Remove define. (fetch_vfp_regs, store_vfp_regs) (arm_linux_nat_target::read_description): Use ARM_VFP3_REGS_SIZE. * arm-tdep.c (arm_register_g_packet_guesses): Use new defines. gdb/gdbserver/ChangeLog: * linux-aarch32-low.c (arm_read_description, arm_regsets): Use new defines. * linux-arm-low.c (arm_read_description, arm_regsets): Likewise.
2019-07-04i386/AArch64: Remove old xml testsAlan Hayward8-264/+16
Both the i386, X86_64 and AArch64 builds of gdbserver include a bunch of legacy xml files, dat files and auto generated C files, when building for unit test. These tests exists back from when feature target descriptions were added to prove that the new target descriptions were identical to the original older versions. The old files are not used for anything other than these tests. Now that this has been proven, we are not gaining anything by keeping the original files and tests. Should new functionality be added, it would break the tests, unless the functionality was backported to the xml. There is no requirement that we must match the exact xml from N releases ago. It adds obfuscation, where as the feature target descriptions were meant to simplify the code. In addition, there are a bunch of xml and dat files which are completely unused. This patch removes the selftests and the target descriptions from gdbserver. Update the unittest to allow 0 tests (note, this failed on other targets that never had any tests). gdb/ChangeLog: * aarch64-tdep.c: Remove xml self tests. * amd64-linux-tdep.c: Likewise. * amd64-tdep.c: Likewise. * i386-linux-tdep.c: Likewise. * i386-tdep.c: Likewise. gdb/gdbserver/ChangeLog: * configure.srv: Remove legacy xml. * linux-aarch64-low.c (initialize_low_arch): Remove initialize_low_tdesc call. * linux-aarch64-tdesc-selftest.c: Remove file. * linux-aarch64-tdesc.h (initialize_low_tdesc): Remove. * linux-x86-low.c (initialize_low_arch): Remove initialize_low_tdesc call. * linux-x86-tdesc-selftest.c: Remove file. * linux-x86-tdesc.h (initialize_low_tdesc): Remove. gdb/testsuite/ChangeLog: * gdb.server/unittest.exp: Allow 0 unit tests to run.
2019-06-20[gdbserver] Fix s390x -m31 gdbserver buildTom de Vries2-1/+6
When building gdb on s390x with -m31, we run into this error: ... gdb/gdbserver/linux-s390-ipa.c: \ In function 'const target_desc* get_ipa_tdesc(int)': gdb/gdbserver/linux-s390-ipa.c:371:18: error: 's390_te_ft_collect_regmap' \ was not declared in this scope SET_REGMAP(s390_te_ft_collect_regmap, 0); The offending line is part of this code snippet: ... case S390_TDESC_GS: SET_REGMAP(s390_te_ft_collect_regmap, 0); return tdesc_s390_gs_linux64; ... introduced in commit ce29f8439f "S390: Make IPA recognize tdescs with guarded storage". The snippet is part of an #ifdef __s390x__ construct, in the false branch, and in the true branch we find a snippet introduced by the same commit: ... case S390_TDESC_GS: SET_REGMAP(s390x_te_ft_collect_regmap, 0); return tdesc_s390x_gs_linux64; ... which is paired with a comment update for s390x_te_ft_collect_regmap: ... -/* Used for s390x-te-linux64, s390x-tevx-linux64. */ +/* Used for s390x-te-linux64, s390x-tevx-linux64, and + s390x-gs-linux64. */ static const int s390x_te_ft_collect_regmap[] = { ... A similar comment update is added in the same commit for s390_te_linux64_ft_collect_regmap: ... -/* Used for s390-te-linux64, s390-tevx-linux64. */ +/* Used for s390-te-linux64, s390-tevx-linux64, and s390-gs-linux64. */ static const int s390_te_linux64_ft_collect_regmap[] = { ... but not paired with any update. Fix the build breaker by making the offending SET_REGMAP use the regmap indicated by the comment. ... - SET_REGMAP(s390_te_ft_collect_regmap, 0); + SET_REGMAP(s390_te_linux64_ft_collect_regmap, 0); ... Build on s390x-linux with -m31. gdb/gdbserver/ChangeLog: 2019-06-20 Tom de Vries <tdevries@suse.de> * linux-s390-ipa.c (get_ipa_tdesc)[!__s390x__]: Use s390_te_linux64_ft_collect_regmap for S390_TDESC_GS.
2019-06-19[gdb] Fix clang buildbreakerTom de Vries3-2/+7
Building gdb with clang, I run into: ... src/gdb/gdbserver/linux-low.c:6190:41: error: comparison of unsigned \ expression < 0 is always false [-Werror,-Wtautological-compare] if (debug_write ("sigchld_handler\n", sizeof ("sigchld_handler\n") - 1) < 0) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~ ... This regression is introduced by commit a7e559cc08 "gdbserver: Ensure all debug output uses debug functions", which replaces calls to write with result type ssize_t with calls to debug_write with result type size_t. Fix this by making debug_write return ssize_t. Build and reg-tested on x86_64-linux. gdb/gdbserver/ChangeLog: 2019-06-19 Tom de Vries <tdevries@suse.de> * debug.h (debug_write): Change return type to ssize_t. * debug.c (debug_write): Same.
2019-06-16Fix some whitespace issues in gdb ChangeLogsSimon Marchi1-4/+4
2019-06-14Move gnulib to top levelTom Tromey4-4/+11
This patch moves the gdb/gnulib subdirectory to the top level. It adjusts the top-level build system to build gnulib when necessary, and changes gdb to use this. However, gdbserver still builds its own copy of gnulib, just from the new source location. A small hack was needed to ensure that gnulib is only built when gdb is enabled. The Makefile only provides an ordering -- the directory must be mentioned in configdirs to actually be compiled at all. Most of the patch is just a "git mv" of gnulib, though a few minor path adjustments were needed in some files there. Tested by the buildbot. ChangeLog 2019-06-14 Tom Tromey <tom@tromey.com> * MAINTAINERS: Add gnulib. * gnulib: New directory, move from gdb/gnulib. * configure.ac (host_libs): Add gnulib. * configure: Rebuild. * Makefile.def (host_modules, dependencies): Add gnulib. * Makefile.in: Rebuild. gdb/ChangeLog 2019-06-14 Tom Tromey <tom@tromey.com> * gnulib: Move directory to top-level. * configure.ac: Don't configure gnulib. * configure: Rebuild. * common/common-defs.h: Use new path to gnulib. * Makefile.in (GNULIB_BUILDDIR): Now ../gnulib. (GNULIB_H): Remove. (INCGNU): Look in new gnulib location. (HFILES_NO_SRCDIR): Remove gnulib files. (SUBDIR, REQUIRED_SUBDIRS): Remove gnulib. (generated_files): Remove GNULIB_H. ($(LIBGNU), all-lib): Remove targets. (distclean): Don't mention GNULIB_BUILDDIR. ($(GNULIB_BUILDDIR)/Makefile): Remove target. gdb/gdbserver/ChangeLog 2019-06-14 Tom Tromey <tom@tromey.com> * configure.ac: Use new path to gnulib. * configure: Rebuild. * Makefile.in (INCGNU, $(GNULIB_BUILDDIR)/Makefile): Use new path to gnulib. gnulib/ChangeLog 2019-06-14 Tom Tromey <tom@tromey.com> * update-gnulib.sh: Adjust paths. * Makefile.in: Adjust paths. * configure.ac: Adjust paths. Use ACX_LARGEFILE. * configure: Rebuild.
2019-06-11Move gdb's xmalloc and friends to new fileTom Tromey2-0/+19
When "common" becomes a library, linking will cause a symbol clash, because "xmalloc" and some related symbols are defined in that library, libiberty, and readline. To work around this problem, this patch moves the clashing symbols to a new file, which is then compiled separately for both gdb and gdbserver. gdb/ChangeLog 2019-06-11 Tom Tromey <tom@tromey.com> * common/common-utils.c (xmalloc, xrealloc, xcalloc) (xmalloc_failed): Move to alloc.c. * alloc.c: New file. * Makefile.in (COMMON_SFILES): Add alloc.c. gdb/gdbserver/ChangeLog 2019-06-11 Tom Tromey <tom@tromey.com> * Makefile.in (SFILES): Add alloc.c. (OBS): Add alloc.o. (IPA_OBJS): Add alloc-ipa.o. (alloc-ipa.o): New target. (%.o: ../%.c): New pattern rule.
2019-06-10Remove newlines from warningsTom Tromey6-9/+22
ARI pointed out that a recent patch introduced a call to "warning" with a string that ended in a newline: https://sourceware.org/ml/gdb-patches/2019-06/msg00000.html This is generally forbidden, I believe, because warning adds its own newline. This patch removes all of the trailing newlines I was able to find. I searched for 'warning (.*\\n"' and then fixed the ones where the newline appeared at the end of the string (some had internal newlines). Tested on x86-64 Fedora 29. gdb/ChangeLog 2019-06-10 Tom Tromey <tromey@adacore.com> * m32c-tdep.c (m32c_m16c_address_to_pointer): Don't end warning with a newline. * guile/guile.c (handle_boot_error): Don't end warning with a newline. * cli/cli-cmds.c (exit_status_set_internal_vars): Don't end warning with a newline. * s12z-tdep.c (s12z_skip_prologue): Don't end warning with a newline. (s12z_frame_cache): Likewise. * dwarf-index-cache.c (index_cache::store): Don't end warning with a newline. * solib-svr4.c (disable_probes_interface): Don't end warning with a newline. * nat/fork-inferior.c (fork_inferior): Don't end warning with a newline. * python/python.c (do_finish_initialization): Don't end warning with a newline. gdb/gdbserver/ChangeLog 2019-06-10 Tom Tromey <tromey@adacore.com> * remote-utils.c (look_up_one_symbol, relocate_instruction): Don't end warning with a newline. * linux-s390-low.c (s390_get_wordsize): Don't end warning with a newline. * thread-db.c (attach_thread): Don't end warning with a newline. (thread_db_notice_clone): Likewise. * tracepoint.c (gdb_agent_helper_thread): Don't end warning with a newline. * linux-x86-low.c (x86_get_min_fast_tracepoint_insn_len): Don't end warning with a newline.
2019-06-04Introduce and use make_unique_xstrdupPedro Alves2-1/+5
Adds an utility function to make it shorter to write the common case of wrapping an xstrdup with a unique_xmalloc_ptr, and uses it throughout. Note: I tried to put this in common/common-utils.h near skip_spaces, etc. but that is included in common/common-defs.h before common/gdb_unique_ptr.h is included, so it would fail to compile because gdb::unique_xmalloc_ptr isn't defined at that point yet. I tried moving the gdb_unique_ptr.h inclusion before common-utils.h, but that doesn't work because gdb_unique_ptr.h depends on common-utils.h for xfree. gdb/ChangeLog: 2019-06-04 Pedro Alves <palves@redhat.com> * common/gdb_unique_ptr.h (make_unique_xstrdup): New. * ada-lang.c (catch_ada_completer): Use make_unique_xstrdup. * breakpoint.c (condition_completer): Likewise. * cli/cli-dump.c (scan_expression): Likewise. * common/filestuff.c (mkdir_recursive): Likewise. * common/gdb_tilde_expand.c (gdb_tilde_expand_up) * common/pathstuff.c (gdb_realpath, gdb_realpath_keepfile) (gdb_abspath): Likewise. * compile/compile-cplus-types.c (compile_cplus_instance::decl_name): Likewise. * completer.c (complete_explicit_location): (signal_completer, reg_or_group_completer_1): Likewise. * cp-support.c (cp_remove_params_if_any): Likewise. * fbsd-tdep.c (fbsd_core_vnode_path): Likewise. * guile/scm-safe-call.c (gdbscm_safe_eval_string): Likewise. * infcmd.c (strip_bg_char): Likewise. * linespec.c (copy_token_string): Likewise. * mi/mi-main.c (output_cores): Likewise. * psymtab.c (psymtab_search_name): * symfile.c (test_set_ext_lang_command): Likewise. * target.c (target_fileio_read_stralloc): Likewise. * tui/tui-regs.c (tui_reggroup_completer): Likewise. * value.c (complete_internalvar): Likewise. gdb/gdbserver/ChangeLog: 2019-06-04 Pedro Alves <palves@redhat.com> * server.c (captured_main): Use make_unique_xstrdup.
2019-06-02Remove fromhex implementation from gdbreplayTom Tromey3-20/+7
gdbreplay had its own implementation of fromhex. This patch changes it to use the one in common/. gdb/gdbserver/ChangeLog 2019-06-02 Tom Tromey <tom@tromey.com> * gdbreplay.c (fromhex): Remove. * Makefile.in (GDBREPLAY_OBS): Add rsp-low.o.
2019-05-29Add new GCC 9 warnings to warnings.m4Tom Tromey2-1/+8
GCC 9 has a few new warnings that aren't enabled in the gdb build by default: -Wdeprecated-copy, -Wdeprecated-copy-dtor, and -Wredundant-move. This patch enables them all. Tested by rebuilding with a new GCC (git master) on x86-64 Fedora 29. gdb/ChangeLog 2019-05-29 Tom Tromey <tromey@adacore.com> * inflow.c (struct terminal_info): Add default operator=. * configure: Rebuild. * warning.m4 (AM_GDB_WARNINGS): Add -Wdeprecated-copy, -Wdeprecated-copy-dtor, -Wredundant-move. gdb/gdbserver/ChangeLog 2019-05-29 Tom Tromey <tromey@adacore.com> * configure: Rebuild.
2019-05-06Fix regression caused by recently added syscall restart codeKevin Buettner2-0/+7
This line of code... *(int64_t *) ptr = *(int32_t *) ptr; ...in linux-x86-low.c is not needed (and does not work correctly) within a 32-bit executable. I added an __x86_64__ ifdef (which is used extensively elsewhere in the file for like purposes) to prevent this code from being included in 32-bit builds. It fixes the following regressions when running on native i686-pc-linux-gnu: FAIL: gdb.server/abspath.exp: continue to main FAIL: gdb.server/connect-without-multi-process.exp: multiprocess=auto: continue to main FAIL: gdb.server/connect-without-multi-process.exp: multiprocess=off: continue to main FAIL: gdb.server/ext-restart.exp: restart: run to main FAIL: gdb.server/ext-restart.exp: run to main FAIL: gdb.server/ext-run.exp: continue to main FAIL: gdb.server/ext-wrapper.exp: print d FAIL: gdb.server/ext-wrapper.exp: restart: print d FAIL: gdb.server/ext-wrapper.exp: restart: run to marker FAIL: gdb.server/ext-wrapper.exp: run to marker FAIL: gdb.server/no-thread-db.exp: continue to breakpoint: after tls assignment FAIL: gdb.server/reconnect-ctrl-c.exp: first: stop with control-c FAIL: gdb.server/reconnect-ctrl-c.exp: second: stop with control-c FAIL: gdb.server/run-without-local-binary.exp: run test program until the end FAIL: gdb.server/server-kill.exp: continue to breakpoint: after server_pid assignment FAIL: gdb.server/server-kill.exp: tstatus FAIL: gdb.server/server-run.exp: continue to main gdb/gdbserver/ChangeLog: * linux-x86-low.c (x86_fill_gregset): Don't compile 64-bit sign extension code on 32-bit builds.
2019-05-03On MS-Windows, define _WIN32_WINNT in a single common place.Eli Zaretskii3-8/+5
This changeset defines _WIN32_WINNT to at least 0x0501, the level of Windows XP, unless defined to a higher level, in a single place. It then removes all the overrides of _WIN32_WINNT in individual files as no longer needed. Doing this also solves compilation of windows-nat.c with mingw.org's MinGW, as that file uses CONSOLE_FONT_INFO which needs the XP level to become exposed in the Windows headers, while mingw.org defaults to Windows 9X. gdb/ChangeLog: 2019-05-03 Eli Zaretskii <eliz@gnu.org> * common/common-defs.h [__MINGW32__ || __CYGWIN__]: Define _WIN32_WINNT to the XP level, unless already defined to a higher level. * unittests/parse-connection-spec-selftests.c: * ser-tcp.c: * common/netstuff.c [USE_WIN32API]: Remove the _WIN32_WINNT override. gdb/gdbserver/ChangeLog: 2019-05-03 Eli Zaretskii <eliz@gnu.org> * remote-utils.c: * gdbreplay.c [USE_WIN32API]: Remove the _WIN32_WINNT override.
2019-04-19Use std::list for event notifications in gdbserverTom Tromey4-79/+78
This changes gdbserver to use std::list rather than common/queue.h for event notifications. gdb/gdbserver/ChangeLog 2019-04-19 Tom Tromey <tom@tromey.com> * server.c (struct vstop_notif): Derive from notif_event. <base>: Remove. (queue_stop_reply): Update. (remove_all_on_match_ptid): Change type. Rewrite. (discard_queued_stop_replies): Rewrite. (in_queued_stop_replies_ptid): Change type. (in_queued_stop_replies): Rewrite. (notif_stop): Update. (queue_stop_reply_callback): Update. (captured_main): Don't call initialize_notif. (push_stop_notification): Update. * notif.c (notif_write_event, handle_notif_ack) (notif_event_enque, notif_push): Update. (notif_event_xfree, initialize_notif): Remove. * notif.h (struct notif_event): Include <list>, not "common/queue.h". (struct notif_server) <queue>: Now a std::list. (notif_event_p): Remove typedef. (initialize_notif): Don't declare. (struct notif_event): Add virtual destructor.
2019-04-17gdbserver: Ensure all debug output uses debug functionsAlan Hayward5-4/+26
All debug output needs to go via debug functions to ensure it writes to the correct output stream. gdb/ChangeLog: * nat/linux-waitpid.c (linux_debug): Call debug_vprintf. gdb/gdbserver/ChangeLog: * ax.c (ax_vdebug): Call debug_printf. * debug.c (debug_write): New function. * debug.h (debug_write): New declaration. * linux-low.c (sigchld_handler): Call debug_write.
2019-04-17gdbserver: Add debug-file optionAlan Hayward4-3/+58
Add command line option to send all debug output to a given file. Always default back to stderr. Add matching monitor command. Add documentation. gdb/doc/ChangeLog: * gdb.texinfo (Other Command-Line Arguments for gdbserver): Add debug-file option. (Monitor Commands for gdbserver): Likewise. (gdbserver man): Likewise. gdb/gdbserver/ChangeLog: * debug.c (debug_set_output): New function. (debug_vprintf): Send output to debug_file. (debug_flush): Likewise. * debug.h (debug_set_output): New declaration. * server.c (handle_monitor_command): Add debug-file option. (captured_main): Likewise.
2019-04-17gdbserver: Move remote_debug to a single placeAlan Hayward7-16/+18
A comment in debug.h (written in 2014) states: "We declare debug format variables here, and debug_threads but no other debug content variables (e.g., not remote_debug) because while this file is not currently used by IPA it may be some day, and IPA may have its own set of debug content variables". This has resulted in remote_debug being declared in many .c/.h files throughout gdbserver. It would be much simplier to define it one place. The most logical place to define it is in debug.h, surrounded by #define guards. If IPA is changed, then at that point the variable can be moved elsewhere. gdb/gdbserver/ChangeLog: * debug.c (remote_debug): Add definition. * debug.h (remote_debug): Add declaration. * hostio.c (remote_debug): Remove declaration. * remote-utils.c (struct ui_file): Likewise. (remote_debug): Likewise. * remote-utils.h (remote_debug): Likewise, * server.c (remote_debug): Remove definition.
2019-04-10Fix amd64->i386 linux syscall restart problemKevin Buettner2-0/+18
This commit fixes some failures in gdb.base/interrupt.exp when debugging a 32-bit i386 linux inferior from an amd64 host. When running the following test... make check RUNTESTFLAGS="--target_board unix/-m32 interrupt.exp" ... without this commit, I see the following output: FAIL: gdb.base/interrupt.exp: continue (the program exited) FAIL: gdb.base/interrupt.exp: echo data FAIL: gdb.base/interrupt.exp: Send Control-C, second time FAIL: gdb.base/interrupt.exp: signal SIGINT (the program is no longer running) ERROR: Undefined command "". ERROR: GDB process no longer exists === gdb Summary === When the test is run with this commit in place, we see 12 passes instead. This is the desired behavior. Analysis: On Linux, when a syscall is interrupted by a signal, the syscall may return -ERESTARTSYS when a signal occurs. Doing so indicates that the syscall is restartable. Then, depending on settings associated with the signal handler, and after the signal handler is called, the kernel can then either return -EINTR or can cause the syscall to be restarted. In this discussion, we are concerned with the latter case. On i386, the kernel returns this status via the EAX register. When debugging a 32-bit (i386) process from a 64-bit (amd64) GDB, the debugger fetches 64-bit registers even though the process being debugged is 32-bit. Since we're debugging a 32-bit target, only 32 bits are being saved in the register cache. Now, ideally, GDB would save all 64-bits in the regcache and then would be able to restore those same values when it comes time to continue the target. I've looked into doing this, but it's not easy and I don't see many benefits to doing so. One benefit, however, would be that EAX would appear as a negative value for doing syscall restarts. At the moment, GDB is setting the high 32 bits of RAX (and other registers too) to 0. So, when GDB restores EAX just prior to a syscall restart, the high 32 bits of RAX are zeroed, thus making it look like a positive value. For this particular purpose, we need to sign extend EAX so that RAX will appear as a negative value when EAX is set to -ERESTARTSYS. This in turn will cause the signal handling code in the kernel to recognize -ERESTARTSYS which will in turn cause the syscall to be restarted. This commit is based on work by Jan Kratochvil from 2009: https://sourceware.org/ml/gdb-patches/2009-11/msg00592.html Jan's patch had the sign extension code in amd64-nat.c. Several other native targets make use of this code, so it seemed better to move the sign extension code to a linux specific file. I also added similar code to gdbserver. Another approach is to fix the problem in the kernel. Hui Zhu tried to get a fix into the kernel back in 2014, but it was not accepted. Discussion regarding this approach may be found here: https://lore.kernel.org/patchwork/patch/457841/ Even if a fix were to be put into the kernel, we'd still need some kind of fix in GDB in order to support older kernels. Finally, I'll note that Fedora has been carrying a similar patch for at least nine years. Other distributions, including RHEL and CentOS have picked up this change and have been using it too. gdb/ChangeLog: * amd64-linux-nat.c (amd64_linux_collect_native_gregset): New function. (fill_gregset): Call amd64_linux_collect_native_gregset instead of amd64_collect_native_gregset. (amd64_linux_nat_target::store_registers): Likewise. gdb/gdbserver/ChangeLog: * linux-x86-low.c (x86_fill_gregset): Sign extend EAX value when using a 64-bit gdbserver.
2019-04-09Use find_thread_in_random in select_event_lwpTom Tromey2-31/+8
I noticed that find_thread_in_random duplicates the code in find_thread_in_random, so this patch changes the latter to use the former. There are two other spots in gdb that do this, but to unify all of them would require switching some code from using the "iterate over" idiom to using iterators. Another possible improvement is that find_thread_in_random could be made single-pass using reservoir sampling. Tested by the buildbot. gdb/gdbserver/ChangeLog 2019-04-09 Tom Tromey <tromey@adacore.com> * linux-low.c (select_event_lwp): Use find_thread_in_random.
2019-04-08Replace throw_exception with throw in some casesTom Tromey2-2/+8
This replaces throw_exception with "throw;" when possible. This was written by script. The rule that is followed is that uses of the form: catch (... &name) { ... throw_exception (name); } ... can be rewritten. This should always be safe, because exceptions are caught by const reference, and therefore can't be modified in the body of the catch. gdb/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * valops.c (value_rtti_indirect_type): Replace throw_exception with throw. * tracefile-tfile.c (tfile_target_open): Replace throw_exception with throw. * thread.c (thr_try_catch_cmd): Replace throw_exception with throw. * target.c (target_translate_tls_address): Replace throw_exception with throw. * stack.c (frame_apply_command_count): Replace throw_exception with throw. * solib-spu.c (append_ocl_sos): Replace throw_exception with throw. * s390-tdep.c (s390_frame_unwind_cache): Replace throw_exception with throw. * rs6000-tdep.c (rs6000_frame_cache) (rs6000_epilogue_frame_cache): Replace throw_exception with throw. * remote.c: Replace throw_exception with throw. * record-full.c (record_full_message, record_full_wait_1) (record_full_restore): Replace throw_exception with throw. * record-btrace.c: (get_thread_current_frame_id, record_btrace_start_replaying) (cmd_record_btrace_bts_start, cmd_record_btrace_pt_start) (cmd_record_btrace_start): Replace throw_exception with throw. * parse.c (parse_exp_in_context_1): Replace throw_exception with throw. * linux-nat.c (detach_one_lwp, linux_resume_one_lwp) (resume_stopped_resumed_lwps): Replace throw_exception with throw. * linespec.c: (find_linespec_symbols): Replace throw_exception with throw. * infrun.c (displaced_step_prepare, resume): Replace throw_exception with throw. * infcmd.c (post_create_inferior): Replace throw_exception with throw. * inf-loop.c (inferior_event_handler): Replace throw_exception with throw. * i386-tdep.c (i386_frame_cache, i386_epilogue_frame_cache) (i386_sigtramp_frame_cache): Replace throw_exception with throw. * frame.c (frame_unwind_pc, get_prev_frame_if_no_cycle) (get_prev_frame_always, get_frame_pc_if_available) (get_frame_address_in_block_if_available, get_frame_language): Replace throw_exception with throw. * frame-unwind.c (frame_unwind_try_unwinder): Replace throw_exception with throw. * eval.c (fetch_subexp_value, evaluate_var_value) (evaluate_funcall, evaluate_subexp_standard): Replace throw_exception with throw. * dwarf2loc.c (call_site_find_chain) (dwarf2_evaluate_loc_desc_full, dwarf2_locexpr_baton_eval): Replace throw_exception with throw. * dwarf2-frame.c (dwarf2_frame_cache): Replace throw_exception with throw. * darwin-nat.c (darwin_attach_pid): Replace throw_exception with throw. * cp-abi.c (baseclass_offset): Replace throw_exception with throw. * completer.c (complete_line_internal): Replace throw_exception with throw. * compile/compile-object-run.c (compile_object_run): Replace throw_exception with throw. * cli/cli-script.c (process_next_line): Replace throw_exception with throw. * btrace.c (btrace_compute_ftrace_pt, btrace_compute_ftrace) (btrace_enable, btrace_maint_update_pt_packets): Replace throw_exception with throw. * breakpoint.c (create_breakpoint, save_breakpoints): Replace throw_exception with throw. * break-catch-throw.c (re_set_exception_catchpoint): Replace throw_exception with throw. * amd64-tdep.c (amd64_frame_cache, amd64_sigtramp_frame_cache) (amd64_epilogue_frame_cache): Replace throw_exception with throw. * aarch64-tdep.c (aarch64_make_prologue_cache) (aarch64_make_stub_cache): Replace throw_exception with throw. gdb/gdbserver/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * linux-low.c (linux_detach_one_lwp): Replace throw_exception with throw. (linux_resume_one_lwp): Likewise.
2019-04-08Rename gdb exception typesTom Tromey4-9/+15
This renames the gdb exception types. The old types were only needed due to the macros in common-exception.h that are now gone. The intermediate layer of gdb_exception_RETURN_MASK_ALL did not seem needed, so this patch removes it entirely. gdb/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * common/common-exceptions.h (gdb_exception_RETURN_MASK_ALL): Remove. (gdb_exception_error): Rename from gdb_exception_RETURN_MASK_ERROR. (gdb_exception_quit): Rename from gdb_exception_RETURN_MASK_QUIT. (gdb_quit_bad_alloc): Update. * aarch64-tdep.c: Update. * ada-lang.c: Update. * ada-typeprint.c: Update. * ada-valprint.c: Update. * amd64-tdep.c: Update. * arch-utils.c: Update. * break-catch-throw.c: Update. * breakpoint.c: Update. * btrace.c: Update. * c-varobj.c: Update. * cli/cli-cmds.c: Update. * cli/cli-interp.c: Update. * cli/cli-script.c: Update. * common/common-exceptions.c: Update. * common/new-op.c: Update. * common/selftest.c: Update. * compile/compile-c-symbols.c: Update. * compile/compile-cplus-symbols.c: Update. * compile/compile-object-load.c: Update. * compile/compile-object-run.c: Update. * completer.c: Update. * corelow.c: Update. * cp-abi.c: Update. * cp-support.c: Update. * cp-valprint.c: Update. * darwin-nat.c: Update. * disasm-selftests.c: Update. * dtrace-probe.c: Update. * dwarf-index-cache.c: Update. * dwarf-index-write.c: Update. * dwarf2-frame-tailcall.c: Update. * dwarf2-frame.c: Update. * dwarf2loc.c: Update. * dwarf2read.c: Update. * eval.c: Update. * event-loop.c: Update. * event-top.c: Update. * exec.c: Update. * f-valprint.c: Update. * fbsd-tdep.c: Update. * frame-unwind.c: Update. * frame.c: Update. * gdbtypes.c: Update. * gnu-v3-abi.c: Update. * guile/guile-internal.h: Update. * guile/scm-block.c: Update. * guile/scm-breakpoint.c: Update. * guile/scm-cmd.c: Update. * guile/scm-disasm.c: Update. * guile/scm-frame.c: Update. * guile/scm-lazy-string.c: Update. * guile/scm-math.c: Update. * guile/scm-param.c: Update. * guile/scm-ports.c: Update. * guile/scm-pretty-print.c: Update. * guile/scm-symbol.c: Update. * guile/scm-symtab.c: Update. * guile/scm-type.c: Update. * guile/scm-value.c: Update. * i386-linux-tdep.c: Update. * i386-tdep.c: Update. * inf-loop.c: Update. * infcall.c: Update. * infcmd.c: Update. * infrun.c: Update. * jit.c: Update. * language.c: Update. * linespec.c: Update. * linux-fork.c: Update. * linux-nat.c: Update. * linux-tdep.c: Update. * linux-thread-db.c: Update. * main.c: Update. * mi/mi-cmd-break.c: Update. * mi/mi-cmd-stack.c: Update. * mi/mi-interp.c: Update. * mi/mi-main.c: Update. * objc-lang.c: Update. * p-valprint.c: Update. * parse.c: Update. * ppc-linux-tdep.c: Update. * printcmd.c: Update. * python/py-arch.c: Update. * python/py-breakpoint.c: Update. * python/py-cmd.c: Update. * python/py-finishbreakpoint.c: Update. * python/py-frame.c: Update. * python/py-framefilter.c: Update. * python/py-gdb-readline.c: Update. * python/py-inferior.c: Update. * python/py-infthread.c: Update. * python/py-lazy-string.c: Update. * python/py-linetable.c: Update. * python/py-objfile.c: Update. * python/py-param.c: Update. * python/py-prettyprint.c: Update. * python/py-progspace.c: Update. * python/py-record-btrace.c: Update. * python/py-record.c: Update. * python/py-symbol.c: Update. * python/py-type.c: Update. * python/py-unwind.c: Update. * python/py-utils.c: Update. * python/py-value.c: Update. * python/python.c: Update. * record-btrace.c: Update. * record-full.c: Update. * remote-fileio.c: Update. * remote.c: Update. * riscv-tdep.c: Update. * rs6000-aix-tdep.c: Update. * rs6000-tdep.c: Update. * rust-exp.y: Update. * rust-lang.c: Update. * s390-tdep.c: Update. * selftest-arch.c: Update. * solib-dsbt.c: Update. * solib-frv.c: Update. * solib-spu.c: Update. * solib-svr4.c: Update. * solib.c: Update. * sparc64-linux-tdep.c: Update. * stack.c: Update. * symfile-mem.c: Update. * symmisc.c: Update. * target.c: Update. * thread.c: Update. * top.c: Update. * tracefile-tfile.c: Update. * tui/tui.c: Update. * typeprint.c: Update. * unittests/cli-utils-selftests.c: Update. * unittests/parse-connection-spec-selftests.c: Update. * valops.c: Update. * valprint.c: Update. * value.c: Update. * varobj.c: Update. * windows-nat.c: Update. * x86-linux-nat.c: Update. * xml-support.c: Update. gdb/gdbserver/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * gdbreplay.c: Update. * linux-low.c: Update. * server.c: Update.
2019-04-08Rewrite TRY/CATCHTom Tromey4-27/+24
This rewrites gdb's TRY/CATCH to plain C++ try/catch. The patch was largely written by script, though one change (to a comment in common-exceptions.h) was reverted by hand. gdb/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * xml-support.c: Use C++ exception handling. * x86-linux-nat.c: Use C++ exception handling. * windows-nat.c: Use C++ exception handling. * varobj.c: Use C++ exception handling. * value.c: Use C++ exception handling. * valprint.c: Use C++ exception handling. * valops.c: Use C++ exception handling. * unittests/parse-connection-spec-selftests.c: Use C++ exception handling. * unittests/cli-utils-selftests.c: Use C++ exception handling. * typeprint.c: Use C++ exception handling. * tui/tui.c: Use C++ exception handling. * tracefile-tfile.c: Use C++ exception handling. * top.c: Use C++ exception handling. * thread.c: Use C++ exception handling. * target.c: Use C++ exception handling. * symmisc.c: Use C++ exception handling. * symfile-mem.c: Use C++ exception handling. * stack.c: Use C++ exception handling. * sparc64-linux-tdep.c: Use C++ exception handling. * solib.c: Use C++ exception handling. * solib-svr4.c: Use C++ exception handling. * solib-spu.c: Use C++ exception handling. * solib-frv.c: Use C++ exception handling. * solib-dsbt.c: Use C++ exception handling. * selftest-arch.c: Use C++ exception handling. * s390-tdep.c: Use C++ exception handling. * rust-lang.c: Use C++ exception handling. * rust-exp.y: Use C++ exception handling. * rs6000-tdep.c: Use C++ exception handling. * rs6000-aix-tdep.c: Use C++ exception handling. * riscv-tdep.c: Use C++ exception handling. * remote.c: Use C++ exception handling. * remote-fileio.c: Use C++ exception handling. * record-full.c: Use C++ exception handling. * record-btrace.c: Use C++ exception handling. * python/python.c: Use C++ exception handling. * python/py-value.c: Use C++ exception handling. * python/py-utils.c: Use C++ exception handling. * python/py-unwind.c: Use C++ exception handling. * python/py-type.c: Use C++ exception handling. * python/py-symbol.c: Use C++ exception handling. * python/py-record.c: Use C++ exception handling. * python/py-record-btrace.c: Use C++ exception handling. * python/py-progspace.c: Use C++ exception handling. * python/py-prettyprint.c: Use C++ exception handling. * python/py-param.c: Use C++ exception handling. * python/py-objfile.c: Use C++ exception handling. * python/py-linetable.c: Use C++ exception handling. * python/py-lazy-string.c: Use C++ exception handling. * python/py-infthread.c: Use C++ exception handling. * python/py-inferior.c: Use C++ exception handling. * python/py-gdb-readline.c: Use C++ exception handling. * python/py-framefilter.c: Use C++ exception handling. * python/py-frame.c: Use C++ exception handling. * python/py-finishbreakpoint.c: Use C++ exception handling. * python/py-cmd.c: Use C++ exception handling. * python/py-breakpoint.c: Use C++ exception handling. * python/py-arch.c: Use C++ exception handling. * printcmd.c: Use C++ exception handling. * ppc-linux-tdep.c: Use C++ exception handling. * parse.c: Use C++ exception handling. * p-valprint.c: Use C++ exception handling. * objc-lang.c: Use C++ exception handling. * mi/mi-main.c: Use C++ exception handling. * mi/mi-interp.c: Use C++ exception handling. * mi/mi-cmd-stack.c: Use C++ exception handling. * mi/mi-cmd-break.c: Use C++ exception handling. * main.c: Use C++ exception handling. * linux-thread-db.c: Use C++ exception handling. * linux-tdep.c: Use C++ exception handling. * linux-nat.c: Use C++ exception handling. * linux-fork.c: Use C++ exception handling. * linespec.c: Use C++ exception handling. * language.c: Use C++ exception handling. * jit.c: Use C++ exception handling. * infrun.c: Use C++ exception handling. * infcmd.c: Use C++ exception handling. * infcall.c: Use C++ exception handling. * inf-loop.c: Use C++ exception handling. * i386-tdep.c: Use C++ exception handling. * i386-linux-tdep.c: Use C++ exception handling. * guile/scm-value.c: Use C++ exception handling. * guile/scm-type.c: Use C++ exception handling. * guile/scm-symtab.c: Use C++ exception handling. * guile/scm-symbol.c: Use C++ exception handling. * guile/scm-pretty-print.c: Use C++ exception handling. * guile/scm-ports.c: Use C++ exception handling. * guile/scm-param.c: Use C++ exception handling. * guile/scm-math.c: Use C++ exception handling. * guile/scm-lazy-string.c: Use C++ exception handling. * guile/scm-frame.c: Use C++ exception handling. * guile/scm-disasm.c: Use C++ exception handling. * guile/scm-cmd.c: Use C++ exception handling. * guile/scm-breakpoint.c: Use C++ exception handling. * guile/scm-block.c: Use C++ exception handling. * guile/guile-internal.h: Use C++ exception handling. * gnu-v3-abi.c: Use C++ exception handling. * gdbtypes.c: Use C++ exception handling. * frame.c: Use C++ exception handling. * frame-unwind.c: Use C++ exception handling. * fbsd-tdep.c: Use C++ exception handling. * f-valprint.c: Use C++ exception handling. * exec.c: Use C++ exception handling. * event-top.c: Use C++ exception handling. * event-loop.c: Use C++ exception handling. * eval.c: Use C++ exception handling. * dwarf2read.c: Use C++ exception handling. * dwarf2loc.c: Use C++ exception handling. * dwarf2-frame.c: Use C++ exception handling. * dwarf2-frame-tailcall.c: Use C++ exception handling. * dwarf-index-write.c: Use C++ exception handling. * dwarf-index-cache.c: Use C++ exception handling. * dtrace-probe.c: Use C++ exception handling. * disasm-selftests.c: Use C++ exception handling. * darwin-nat.c: Use C++ exception handling. * cp-valprint.c: Use C++ exception handling. * cp-support.c: Use C++ exception handling. * cp-abi.c: Use C++ exception handling. * corelow.c: Use C++ exception handling. * completer.c: Use C++ exception handling. * compile/compile-object-run.c: Use C++ exception handling. * compile/compile-object-load.c: Use C++ exception handling. * compile/compile-cplus-symbols.c: Use C++ exception handling. * compile/compile-c-symbols.c: Use C++ exception handling. * common/selftest.c: Use C++ exception handling. * common/new-op.c: Use C++ exception handling. * cli/cli-script.c: Use C++ exception handling. * cli/cli-interp.c: Use C++ exception handling. * cli/cli-cmds.c: Use C++ exception handling. * c-varobj.c: Use C++ exception handling. * btrace.c: Use C++ exception handling. * breakpoint.c: Use C++ exception handling. * break-catch-throw.c: Use C++ exception handling. * arch-utils.c: Use C++ exception handling. * amd64-tdep.c: Use C++ exception handling. * ada-valprint.c: Use C++ exception handling. * ada-typeprint.c: Use C++ exception handling. * ada-lang.c: Use C++ exception handling. * aarch64-tdep.c: Use C++ exception handling. gdb/gdbserver/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * server.c: Use C++ exception handling. * linux-low.c: Use C++ exception handling. * gdbreplay.c: Use C++ exception handling.
2019-04-08Make exceptions use std::string and be self-managingTom Tromey3-7/+15
This changes the exception's "message" member to be a shared_ptr wrapping a std::string. This allows removing the stack of exception messages, because now exceptions will self-destruct when needed. This also adds a noexcept copy constructor and operator= to gdb_exception, plus a "what" method. gdb/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * xml-support.c (gdb_xml_parser::parse): Update. * x86-linux-nat.c (x86_linux_nat_target::enable_btrace): Update. * value.c (show_convenience): Update. * unittests/cli-utils-selftests.c (test_number_or_range_parser) (test_parse_flags_qcs): Update. * thread.c (thr_try_catch_cmd): Update. * target.c (target_translate_tls_address): Update. * stack.c (print_frame_arg, read_frame_local, read_frame_arg) (info_frame_command_core, frame_apply_command_count): Update. * rust-exp.y (rust_lex_exception_test): Update. * riscv-tdep.c (riscv_print_one_register_info): Update. * remote.c (remote_target::enable_btrace): Update. * record-btrace.c (record_btrace_enable_warn): Update. * python/py-utils.c (gdbpy_convert_exception): Update. * printcmd.c (do_one_display, print_variable_and_value): Update. * mi/mi-main.c (mi_print_exception): Update. * mi/mi-interp.c (mi_cmd_interpreter_exec): Use SCOPE_EXIT. * mi/mi-cmd-stack.c (list_arg_or_local): Update. * linux-nat.c (linux_nat_target::attach): Update. * linux-fork.c (class scoped_switch_fork_info): Update. * infrun.c (displaced_step_prepare): Update. * infcall.c (call_function_by_hand_dummy): Update. * guile/scm-exception.c (gdbscm_scm_from_gdb_exception): Update. * gnu-v3-abi.c (print_one_vtable): Update. * frame.c (get_prev_frame_always): Update. * f-valprint.c (info_common_command_for_block): Update. * exec.c (try_open_exec_file): Update. * exceptions.c (print_exception, exception_print) (exception_fprintf, exception_print_same): Update. * dwarf2-frame.c (dwarf2_build_frame_info): Update. * dwarf-index-cache.c (index_cache::store) (index_cache::lookup_gdb_index): Update. * darwin-nat.c (maybe_cache_shell): Update. * cp-valprint.c (cp_print_value_fields): Update. * compile/compile-cplus-symbols.c (gcc_cplus_convert_symbol) (gcc_cplus_symbol_address): Update. * compile/compile-c-symbols.c (gcc_convert_symbol) (gcc_symbol_address, generate_c_for_for_one_variable): Update. * common/selftest.c: Update. * common/common-exceptions.h (struct gdb_exception) <message>: Now a std::string. (exception_try_scope_entry, exception_try_scope_exit): Don't declare. (struct exception_try_scope): Remove. (TRY): Don't use exception_try_scope. (struct gdb_exception): Add constructor, operator=. <what>: New method. (struct gdb_exception_RETURN_MASK_ALL) (struct gdb_exception_RETURN_MASK_ERROR) (struct gdb_exception_RETURN_MASK_QUIT): Add constructor. (struct gdb_quit_bad_alloc): Update. * common/common-exceptions.c (exception_none): Change initializer. (struct catcher) <state, exception>: Initialize inline. <prev>: Remove member. (current_catcher): Remove. (catchers): New global. (exceptions_state_mc_init): Simplify. (catcher_pop): Remove. (exceptions_state_mc, exceptions_state_mc_catch): Update. (try_scope_depth, exception_try_scope_entry) (exception_try_scope_exit): Remove. (throw_exception_sjlj): Update. (exception_messages, exception_messages_size): Remove. (throw_it): Simplify. (gdb_exception_sliced_copy): Remove. (throw_exception_cxx): Update. * cli/cli-script.c (script_from_file): Update. * breakpoint.c (insert_bp_location, update_breakpoint_locations): Update. * ada-valprint.c (ada_val_print): Update. * ada-lang.c (ada_to_fixed_type_1, ada_exception_name_addr) (create_excep_cond_exprs): Update. gdb/gdbserver/ChangeLog 2019-04-08 Tom Tromey <tom@tromey.com> * server.c (handle_btrace_general_set, handle_qxfer_btrace) (handle_qxfer_btrace_conf, detach_or_kill_for_exit_cleanup) (captured_main, main): Update. * gdbreplay.c (main): Update.
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