binutils-gdb/gdb/proc-why.c

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Remove ioctl-based procfs support on Solaris This is the previously mentioned patch to get rid of unstructured/ioctl-based procfs support in procfs.c. Given that support for structured procfs was introduced in Solaris 2.6 back in 1997 and we're just removing support for Solaris < 10, there's no point in carrying that baggage (and tons of support for IRIX and OSF/1 as well) around any longer. Most of the patch should be straightforward (removing support for !NEW_PROC_API, non-Solaris OSes and pre-Solaris 10 quirks). Only a few points need explanations: * <sys/syscall.h> was already included unconditionally in most places, so there's no need to have guards in a few remaining ones. * configure.host already obsoletes i?86-*-sysv4.2, i?86-*-sysv5, so NEW_PROC_API detection for those in configure.ac can go. * I'm still including <sys/procfs.h> with #define _STRUCTURED_PROC 1. Theoretically, it would be better to include <procfs.h> on Solaris (which includes that define), but that breaks the build over <procfs.h> vs. gdb's "procfs.h", and doesn't exist on Linux. * I've regenerated syscall_table[] in proc-events.c with a small script from Solaris 10, 11.3, 11.4 <sys/syscall.h>, so there should be no traces of older Solaris versions and other OSes left. * prsysent_t and DYNAMIC_SYSCALLS was only used for AIX 5, but AIX doesn't use procfs.c any longer, so all related code can go. The patch was generated with diff -w so one can easier see changes without being distracted by simple reindentations. So far, it has only been compiled and smoke-tested on amd64-pc-solaris2.1[01], sparcv9-sun-solaris2.1[01], and x86_64-pc-linux-gnu. Certainly needs more testing (Solaris 11.3 vs. 11.4, 32-bit gdb, testsuite once I've figured out what's wrong on Solaris 10 etc.), but it's enough to get a first impression how much cleanup is possible here. * configure.ac Don't check for sys/fault.h, sys/syscall.h, sys/proc.h. (NEW_PROC_API): Remove. (prsysent_t, pr_sigset_t, pr_sigaction64_t, pr_siginfo64_t): Likewise. * common/common.m4 (GDB_AC_COMMON): Don't check for sys/syscall.h. * configure: Regenerate. * config.in: Regenerate. * gdbserver/configure: Regenerate. * gdbserver/config.in: Regenerate. * i386-sol2-nat.c (_initialize_amd64_sol2_nat): Remove NEW_PROC_API test. * sparc-sol2-nat.c (_initialize_sparc_sol2_nat): Likewise. * linux-btrace.c: Remove HAVE_SYS_SYSCALL_H test. * proc-api.c: Remove !NEW_PROC_API support. Remove HAVE_SYS_PROC_H and HAVE_SYS_USER_H tests. Remove tests for macros always defined on Solaris. * proc-events.c: Remove !NEW_PROC_API support. Remove Remove HAVE_SYS_SYSCALL_H, HAVE_SYS_PROC_H and HAVE_SYS_USER_H tests. (init_syscall_table): Remove non-Solaris syscalls. Remove tests for syscalls present on all Solaris versions. Add missing Solaris 10+ syscalls. (signal_table): Remove non-Solaris signals. Remove tests for signals present on all Solaris versions. (fault_table): Remove non-Solaris faults. Remove tests for faults present on all Solaris versions. * proc-flags.c: Remove !NEW_PROC_API support. (pr_flag_table): Remove non-Solaris and pre-Solaris 7 comments. Remove non-Solaris flags. * proc-why.c: Remove !NEW_PROC_API support. (pr_why_table): Remove meaningless comments. Remove tests for reasons present on all Solaris versions. Remove OSF/1 cases. (proc_prettyfprint_why): Likewise. * procfs.c: Remove !NEW_PROC_API and DYNAMIC_SYSCALLS support. Remove HAVE_SYS_FAULT_H and HAVE_SYS_SYSCALL_H tests. Remove WA_READ test, IRIX watchpoint support. (gdb_sigset_t, gdb_sigaction_t, gdb_siginfo_t): Replace by base types. Change users. (gdb_praddset, gdb_prdelset, gdb_premptysysset, gdb_praddsysset) (gdb_prdelset, gdb_pr_issyssetmember): Replace by base macros. Change callers. Remove CTL_PROC_NAME_FMT tests. (gdb_prstatus_t, gdb_lwpstatus_t): Replace by base types. Change users. (sysset_t_size): Remove. Use sizeof (sysset_t) in callers. Remove PROCFS_DONT_PIOCSSIG_CURSIG support. (proc_modify_flag): Replace GDBRESET by PCUNSET. Remove PR_ASYNC, PR_KLC tests. (proc_unset_inherit_on_fork): Remove PR_ASYNC test. (proc_parent_pid): Remove PCWATCH etc. tests. (proc_set_watchpoint): Remove !PCWATCH && !PIOCSWATCH support. Remove PCAGENT test. (proc_get_nthreads) [PIOCNTHR && PIOCTLIST]: Remove. Remove SYS_lwpcreate || SYS_lwp_create test. (proc_get_current_thread): Likewise. [PIOCNTHR && PIOCTLIST]: Remove. [PIOCLSTATUS]: Remove. (procfs_debug_inferior): Remove non-Solaris cases, conditionals. [PRFS_STOPEXEC]: Remove. (syscall_is_lwp_exit): Remove non-Solaris cases, conditionals. (syscall_is_exit): Likewise. (syscall_is_exec): Likewise. (syscall_is_lwp_create): Likewise. Remove SYS_syssgi support. (procfs_wait): Remove PR_ASYNC, !PIOCSSPCACT tests. [SYS_syssgi]: Remove. Remove non-Solaris cases, conditionals. (unconditionally_kill_inferior) [PROCFS_NEED_PIOCSSIG_FOR_KILL]: Remove. (procfs_init_inferior) [SYS_syssgi]: Remove. (procfs_set_exec_trap) [PRFS_STOPEXEC]: Remove. (procfs_inferior_created) [SYS_syssgi]: Remove. (procfs_set_watchpoint): Remove !AIX5 test. (procfs_stopped_by_watchpoint): Remove FLTWATCH test, FLTKWATCH case. (mappingflags) [MA_PHYS]: Remove. (info_mappings_callback): Remove PCAGENT test. Remove PIOCOPENLWP || PCAGENT test.
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/* Machine-independent support for Solaris /proc (process file system)
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Copyright (C) 1999-2019 Free Software Foundation, Inc.
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Written by Michael Snyder at Cygnus Solutions.
Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
#define _STRUCTURED_PROC 1
#include <sys/types.h>
#include <sys/procfs.h>
#include "proc-utils.h"
/* Much of the information used in the /proc interface, particularly
for printing status information, is kept as tables of structures of
the following form. These tables can be used to map numeric values
to their symbolic names and to a string that describes their
specific use. */
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struct trans
{
int value; /* The numeric value. */
const char *name; /* The equivalent symbolic value. */
const char *desc; /* Short description of value. */
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};
/* Translate values in the pr_why field of a `struct prstatus' or
`struct lwpstatus'. */
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static struct trans pr_why_table[] =
{
{ PR_REQUESTED, "PR_REQUESTED",
"Directed to stop by debugger via P(IO)CSTOP or P(IO)CWSTOP" },
{ PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
{ PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
{ PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
{ PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
{ PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
{ PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
{ PR_CHECKPOINT, "PR_CHECKPOINT", "Process stopped at checkpoint" },
};
/* Pretty-print the pr_why field of a `struct prstatus' or `struct
lwpstatus'. */
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void
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proc_prettyfprint_why (FILE *file, unsigned long why, unsigned long what,
int verbose)
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{
int i;
if (why == 0)
return;
for (i = 0; i < ARRAY_SIZE (pr_why_table); i++)
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if (why == pr_why_table[i].value)
{
fprintf (file, "%s ", pr_why_table[i].name);
if (verbose)
fprintf (file, ": %s ", pr_why_table[i].desc);
switch (why) {
case PR_REQUESTED:
break; /* Nothing more to print. */
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case PR_SIGNALLED:
proc_prettyfprint_signal (file, what, verbose);
break;
case PR_FAULTED:
proc_prettyfprint_fault (file, what, verbose);
break;
case PR_SYSENTRY:
fprintf (file, "Entry to ");
proc_prettyfprint_syscall (file, what, verbose);
break;
case PR_SYSEXIT:
fprintf (file, "Exit from ");
proc_prettyfprint_syscall (file, what, verbose);
break;
case PR_JOBCONTROL:
proc_prettyfprint_signal (file, what, verbose);
break;
default:
fprintf (file, "Unknown why %ld, what %ld\n", why, what);
break;
}
fprintf (file, "\n");
return;
}
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fprintf (file, "Unknown pr_why.\n");
}
void
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proc_prettyprint_why (unsigned long why, unsigned long what, int verbose)
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{
proc_prettyfprint_why (stdout, why, what, verbose);
}