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Re: [PATCH] [PR gdb/23093] Implementation of "gdbarch_gdb_signal_to/from_target" on FreeBSD
- From: Rajendra SY <rajendra dot sy at gmail dot com>
- To: John Baldwin <jhb at freebsd dot org>
- Cc: gdb-patches at sourceware dot org
- Date: Thu, 10 May 2018 07:29:02 +0530
- Subject: Re: [PATCH] [PR gdb/23093] Implementation of "gdbarch_gdb_signal_to/from_target" on FreeBSD
- References: <CAMAnt0mWQLGsYpwqJucrkuf0U+3caSVy_6BgDb1CwShB3cYnew@mail.gmail.com> <3393443.3hyCjj7TaN@ralph.baldwin.cx> <CAMAnt0=OGxiY3jWFOyby6Tn78jxOkiNnLzJY=svgFqgofqvnRQ@mail.gmail.com> <3123655.591XJlIpKI@ralph.baldwin.cx>
John,
Could you please send me copyright assignment form to be filled?
I tried to searching & found .doc format files with different contents.
Thanks
Rajendra
On Tue, May 8, 2018 at 5:50 AM, John Baldwin <jhb@freebsd.org> wrote:
> On Saturday, May 05, 2018 11:15:20 AM Rajendra SY wrote:
>> John,
>>
>> Thanks for the review comments.
>> > Do you have a copyright assignment on file for contributions to GDB?
>> No
>>
>> Would you please commit this patch?
>
> I think this change is probably large enough to need a copyright assignment
> before it can go upstream. Can you fill one out and let me know when it is
> filed? Then I can push this in.
>
>> Thanks
>> Rajendra
>>
>>
>> On Sat, May 5, 2018 at 12:01 AM, John Baldwin <jhb@freebsd.org> wrote:
>> > On Friday, April 27, 2018 08:55:03 AM Rajendra SY wrote:
>> >> Resending the same patch for review comments.
>> >>
>> >> Problem:
>> >> The $_exitsignal internal variable does not get updated on FreeBSD platform.
>> >>
>> >> Cause:
>> >> FreeBSD target is missing signal mapping functions
>> >> "gdb_signal_to_target" & "gdb_signal_from_target".
>> >> The code flow gdb/infrun.c:5075 [a call to
>> >> gdbarch_gdb_signal_to_target_p()] tries to find out if the target has
>> >> these functions. In case of FreeBSD it is not so it just skips
>> >> updating '$_exitsignal' variable.
>> >>
>> >> The attached patch implements these functions to provide correct
>> >> FreeBSD signal to GDB signal mapping information.
>> >>
>> >> Tests:
>> >> FAIL: gdb.base/exitsignal.exp: $_exitsignal is 11 (SIGSEGV) after SIGSEGV.
>> >> FAIL: gdb.base/exitsignal.exp: $_exitsignal is 11 (SIGSEGV) after
>> >> restarting the inferior
>> >>
>> >> These above currently failing tests will pass with this fix.
>> >>
>> >> gdb/ChangeLog:
>> >> 2018-04-27 Rajendra SY <rajendra.sy@gmail.com>
>> >>
>> >> PR gdb/23093
>> >> * gdb/fbsd-tdep.c (enum gdb_signal):
>> >> (fbsd_gdb_signal_from_target):
>> >> (fbsd_gdb_signal_to_target):
>> >> (fbsd_init_abi):
>> >
>> > Thanks, I've tested this change and I have some small changes to it below. Do
>> > you have a copyright assignment on file for contributions to GDB?
>> >
>> > From 4346c0567fd137f845cdc46c0a0d8f6047db0ec9 Mon Sep 17 00:00:00 2001
>> > From: Rajendra SY <rajendra.sy@gmail.com>
>> > Date: Wed, 2 May 2018 11:04:24 -0700
>> > Subject: [PATCH] Implement the "gdb_signal_to/from_target" gdbarch methods for
>> > FreeBSD.
>> >
>> > This fixes failures in the gdb.base/exitsignal.exp test.
>> >
>> > gdb/ChangeLog:
>> >
>> > PR gdb/23093
>> > * gdb/fbsd-tdep.c (fbsd_gdb_signal_from_target)
>> > (fbsd_gdb_signal_to_target): New.
>> > (fbsd_init_abi): Install gdbarch "signal_from_target" and
>> > "signal_to_target" methods.
>> > ---
>> > gdb/ChangeLog | 8 ++
>> > gdb/fbsd-tdep.c | 282 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>> > 2 files changed, 290 insertions(+)
>> >
>> > diff --git a/gdb/ChangeLog b/gdb/ChangeLog
>> > index f326c8e2d3..46c474b612 100644
>> > --- a/gdb/ChangeLog
>> > +++ b/gdb/ChangeLog
>> > @@ -1,3 +1,11 @@
>> > +2018-05-02 Rajendra SY <rajendra.sy@gmail.com>
>> > +
>> > + PR gdb/23093
>> > + * gdb/fbsd-tdep.c (fbsd_gdb_signal_from_target)
>> > + (fbsd_gdb_signal_to_target): New.
>> > + (fbsd_init_abi): Install gdbarch "signal_from_target" and
>> > + "signal_to_target" methods.
>> > +
>> > 2018-05-02 Tom Tromey <tom@tromey.com>
>> >
>> > PR python/20084:
>> > diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c
>> > index e49a9aff09..6703cd698d 100644
>> > --- a/gdb/fbsd-tdep.c
>> > +++ b/gdb/fbsd-tdep.c
>> > @@ -29,6 +29,46 @@
>> > #include "elf-bfd.h"
>> > #include "fbsd-tdep.h"
>> >
>> > +/* This enum is derived from FreeBSD's <sys/signal.h>. */
>> > +
>> > +enum
>> > + {
>> > + FREEBSD_SIGHUP = 1,
>> > + FREEBSD_SIGINT = 2,
>> > + FREEBSD_SIGQUIT = 3,
>> > + FREEBSD_SIGILL = 4,
>> > + FREEBSD_SIGTRAP = 5,
>> > + FREEBSD_SIGABRT = 6,
>> > + FREEBSD_SIGEMT = 7,
>> > + FREEBSD_SIGFPE = 8,
>> > + FREEBSD_SIGKILL = 9,
>> > + FREEBSD_SIGBUS = 10,
>> > + FREEBSD_SIGSEGV = 11,
>> > + FREEBSD_SIGSYS = 12,
>> > + FREEBSD_SIGPIPE = 13,
>> > + FREEBSD_SIGALRM = 14,
>> > + FREEBSD_SIGTERM = 15,
>> > + FREEBSD_SIGURG = 16,
>> > + FREEBSD_SIGSTOP = 17,
>> > + FREEBSD_SIGTSTP = 18,
>> > + FREEBSD_SIGCONT = 19,
>> > + FREEBSD_SIGCHLD = 20,
>> > + FREEBSD_SIGTTIN = 21,
>> > + FREEBSD_SIGTTOU = 22,
>> > + FREEBSD_SIGIO = 23,
>> > + FREEBSD_SIGXCPU = 24,
>> > + FREEBSD_SIGXFSZ = 25,
>> > + FREEBSD_SIGVTALRM = 26,
>> > + FREEBSD_SIGPROF = 27,
>> > + FREEBSD_SIGWINCH = 28,
>> > + FREEBSD_SIGINFO = 29,
>> > + FREEBSD_SIGUSR1 = 30,
>> > + FREEBSD_SIGUSR2 = 31,
>> > + FREEBSD_SIGTHR = 32,
>> > + FREEBSD_SIGLIBRT = 33,
>> > + FREEBSD_SIGRTMIN = 65,
>> > + FREEBSD_SIGRTMAX = 126,
>> > + };
>> >
>> > /* FreeBSD kernels 12.0 and later include a copy of the
>> > 'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace
>> > @@ -1143,6 +1183,246 @@ fbsd_get_siginfo_type (struct gdbarch *gdbarch)
>> > return siginfo_type;
>> > }
>> >
>> > +/* Implement the "gdb_signal_from_target" gdbarch method. */
>> > +
>> > +static enum gdb_signal
>> > +fbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
>> > +{
>> > + switch (signal)
>> > + {
>> > + case 0:
>> > + return GDB_SIGNAL_0;
>> > +
>> > + case FREEBSD_SIGHUP:
>> > + return GDB_SIGNAL_HUP;
>> > +
>> > + case FREEBSD_SIGINT:
>> > + return GDB_SIGNAL_INT;
>> > +
>> > + case FREEBSD_SIGQUIT:
>> > + return GDB_SIGNAL_QUIT;
>> > +
>> > + case FREEBSD_SIGILL:
>> > + return GDB_SIGNAL_ILL;
>> > +
>> > + case FREEBSD_SIGTRAP:
>> > + return GDB_SIGNAL_TRAP;
>> > +
>> > + case FREEBSD_SIGABRT:
>> > + return GDB_SIGNAL_ABRT;
>> > +
>> > + case FREEBSD_SIGEMT:
>> > + return GDB_SIGNAL_EMT;
>> > +
>> > + case FREEBSD_SIGFPE:
>> > + return GDB_SIGNAL_FPE;
>> > +
>> > + case FREEBSD_SIGKILL:
>> > + return GDB_SIGNAL_KILL;
>> > +
>> > + case FREEBSD_SIGBUS:
>> > + return GDB_SIGNAL_BUS;
>> > +
>> > + case FREEBSD_SIGSEGV:
>> > + return GDB_SIGNAL_SEGV;
>> > +
>> > + case FREEBSD_SIGSYS:
>> > + return GDB_SIGNAL_SYS;
>> > +
>> > + case FREEBSD_SIGPIPE:
>> > + return GDB_SIGNAL_PIPE;
>> > +
>> > + case FREEBSD_SIGALRM:
>> > + return GDB_SIGNAL_ALRM;
>> > +
>> > + case FREEBSD_SIGTERM:
>> > + return GDB_SIGNAL_TERM;
>> > +
>> > + case FREEBSD_SIGURG:
>> > + return GDB_SIGNAL_URG;
>> > +
>> > + case FREEBSD_SIGSTOP:
>> > + return GDB_SIGNAL_STOP;
>> > +
>> > + case FREEBSD_SIGTSTP:
>> > + return GDB_SIGNAL_TSTP;
>> > +
>> > + case FREEBSD_SIGCONT:
>> > + return GDB_SIGNAL_CONT;
>> > +
>> > + case FREEBSD_SIGCHLD:
>> > + return GDB_SIGNAL_CHLD;
>> > +
>> > + case FREEBSD_SIGTTIN:
>> > + return GDB_SIGNAL_TTIN;
>> > +
>> > + case FREEBSD_SIGTTOU:
>> > + return GDB_SIGNAL_TTOU;
>> > +
>> > + case FREEBSD_SIGIO:
>> > + return GDB_SIGNAL_IO;
>> > +
>> > + case FREEBSD_SIGXCPU:
>> > + return GDB_SIGNAL_XCPU;
>> > +
>> > + case FREEBSD_SIGXFSZ:
>> > + return GDB_SIGNAL_XFSZ;
>> > +
>> > + case FREEBSD_SIGVTALRM:
>> > + return GDB_SIGNAL_VTALRM;
>> > +
>> > + case FREEBSD_SIGPROF:
>> > + return GDB_SIGNAL_PROF;
>> > +
>> > + case FREEBSD_SIGWINCH:
>> > + return GDB_SIGNAL_WINCH;
>> > +
>> > + case FREEBSD_SIGINFO:
>> > + return GDB_SIGNAL_INFO;
>> > +
>> > + case FREEBSD_SIGUSR1:
>> > + return GDB_SIGNAL_USR1;
>> > +
>> > + case FREEBSD_SIGUSR2:
>> > + return GDB_SIGNAL_USR2;
>> > +
>> > + /* SIGTHR is the same as SIGLWP on FreeBSD. */
>> > + case FREEBSD_SIGTHR:
>> > + return GDB_SIGNAL_LWP;
>> > +
>> > + case FREEBSD_SIGLIBRT:
>> > + return GDB_SIGNAL_LIBRT;
>> > + }
>> > +
>> > + if (signal >= FREEBSD_SIGRTMIN && signal <= FREEBSD_SIGRTMAX)
>> > + {
>> > + int offset = signal - FREEBSD_SIGRTMIN;
>> > +
>> > + return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_65 + offset);
>> > + }
>> > +
>> > + return GDB_SIGNAL_UNKNOWN;
>> > +}
>> > +
>> > +/* Implement the "gdb_signal_to_target" gdbarch method. */
>> > +
>> > +static int
>> > +fbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
>> > + enum gdb_signal signal)
>> > +{
>> > + switch (signal)
>> > + {
>> > + case GDB_SIGNAL_0:
>> > + return 0;
>> > +
>> > + case GDB_SIGNAL_HUP:
>> > + return FREEBSD_SIGHUP;
>> > +
>> > + case GDB_SIGNAL_INT:
>> > + return FREEBSD_SIGINT;
>> > +
>> > + case GDB_SIGNAL_QUIT:
>> > + return FREEBSD_SIGQUIT;
>> > +
>> > + case GDB_SIGNAL_ILL:
>> > + return FREEBSD_SIGILL;
>> > +
>> > + case GDB_SIGNAL_TRAP:
>> > + return FREEBSD_SIGTRAP;
>> > +
>> > + case GDB_SIGNAL_ABRT:
>> > + return FREEBSD_SIGABRT;
>> > +
>> > + case GDB_SIGNAL_EMT:
>> > + return FREEBSD_SIGEMT;
>> > +
>> > + case GDB_SIGNAL_FPE:
>> > + return FREEBSD_SIGFPE;
>> > +
>> > + case GDB_SIGNAL_KILL:
>> > + return FREEBSD_SIGKILL;
>> > +
>> > + case GDB_SIGNAL_BUS:
>> > + return FREEBSD_SIGBUS;
>> > +
>> > + case GDB_SIGNAL_SEGV:
>> > + return FREEBSD_SIGSEGV;
>> > +
>> > + case GDB_SIGNAL_SYS:
>> > + return FREEBSD_SIGSYS;
>> > +
>> > + case GDB_SIGNAL_PIPE:
>> > + return FREEBSD_SIGPIPE;
>> > +
>> > + case GDB_SIGNAL_ALRM:
>> > + return FREEBSD_SIGALRM;
>> > +
>> > + case GDB_SIGNAL_TERM:
>> > + return FREEBSD_SIGTERM;
>> > +
>> > + case GDB_SIGNAL_URG:
>> > + return FREEBSD_SIGURG;
>> > +
>> > + case GDB_SIGNAL_STOP:
>> > + return FREEBSD_SIGSTOP;
>> > +
>> > + case GDB_SIGNAL_TSTP:
>> > + return FREEBSD_SIGTSTP;
>> > +
>> > + case GDB_SIGNAL_CONT:
>> > + return FREEBSD_SIGCONT;
>> > +
>> > + case GDB_SIGNAL_CHLD:
>> > + return FREEBSD_SIGCHLD;
>> > +
>> > + case GDB_SIGNAL_TTIN:
>> > + return FREEBSD_SIGTTIN;
>> > +
>> > + case GDB_SIGNAL_TTOU:
>> > + return FREEBSD_SIGTTOU;
>> > +
>> > + case GDB_SIGNAL_IO:
>> > + return FREEBSD_SIGIO;
>> > +
>> > + case GDB_SIGNAL_XCPU:
>> > + return FREEBSD_SIGXCPU;
>> > +
>> > + case GDB_SIGNAL_XFSZ:
>> > + return FREEBSD_SIGXFSZ;
>> > +
>> > + case GDB_SIGNAL_VTALRM:
>> > + return FREEBSD_SIGVTALRM;
>> > +
>> > + case GDB_SIGNAL_PROF:
>> > + return FREEBSD_SIGPROF;
>> > +
>> > + case GDB_SIGNAL_WINCH:
>> > + return FREEBSD_SIGWINCH;
>> > +
>> > + case GDB_SIGNAL_INFO:
>> > + return FREEBSD_SIGINFO;
>> > +
>> > + case GDB_SIGNAL_USR1:
>> > + return FREEBSD_SIGUSR1;
>> > +
>> > + case GDB_SIGNAL_USR2:
>> > + return FREEBSD_SIGUSR2;
>> > +
>> > + case GDB_SIGNAL_LWP:
>> > + return FREEBSD_SIGTHR;
>> > + }
>> > +
>> > + if (signal >= GDB_SIGNAL_REALTIME_65
>> > + && signal <= GDB_SIGNAL_REALTIME_126)
>> > + {
>> > + int offset = signal - GDB_SIGNAL_REALTIME_65;
>> > +
>> > + return FREEBSD_SIGRTMIN + offset;
>> > + }
>> > +
>> > + return -1;
>> > +}
>> > +
>> > /* Implement the "get_syscall_number" gdbarch method. */
>> >
>> > static LONGEST
>> > @@ -1171,6 +1451,8 @@ fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
>> > set_gdbarch_core_info_proc (gdbarch, fbsd_core_info_proc);
>> > set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
>> > set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type);
>> > + set_gdbarch_gdb_signal_from_target (gdbarch, fbsd_gdb_signal_from_target);
>> > + set_gdbarch_gdb_signal_to_target (gdbarch, fbsd_gdb_signal_to_target);
>> >
>> > /* `catch syscall' */
>> > set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
>> > --
>> > 2.15.1
>> >
>> >
>> >
>> > --
>> > John Baldwin
>
>
> --
> John Baldwin