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2011-01-08 Michael Snyder <msnyder@vmware.com>

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* h8300-tdep.c: Comment cleanup, mostly periods and spaces.
	* hppa-hpux-tdep.c: Ditto.
	* hppa-linux-nat.c: Ditto.
	* hppa-linux-tdep.c: Ditto.
	* hppanbsd-tdep.c: Ditto.
	* hppa-tdep.c: Ditto.
	* hppa-tdep.h: Ditto.
	* hpux-thread.c: Ditto.
	* i386-cygwin-tdep.c: Ditto.
	* i386-darwin-nat.c: Ditto.
	* i386gnu-nat.c: Ditto.
	* i386-linux-nat.c: Ditto.
	* i386-linux-tdep.c: Ditto.
	* i386-nat.c: Ditto.
	* i386-nat.h: Ditto.
	* i386nbsd-tdep.c: Ditto.
	* i386-sol2-nat.c: Ditto.
	* i386-stub.c: Ditto.
	* i386-tdep.c: Ditto.
	* i386-tdep.h: Ditto.
	* i387-tdep.c: Ditto.
	* ia64-linux-nat.c: Ditto.
	* ia64-linux-tdep.c: Ditto.
	* ia64-tdep.c: Ditto.
	* infcall.c: Ditto.
	* infcall.h: Ditto.
	* infcmd.c: Ditto.
	* inferior.c: Ditto.
	* inferior.h: Ditto.
	* infloop.c: Ditto.
	* inflow.c: Ditto.
	* infrun.c: Ditto.
	* interps.c: Ditto.
	* interps.h: Ditto.
	* iq2000-tdep.c: Ditto.
	* irix5-nat.c: Ditto.
	* jit.c: Ditto.
	* jit.h: Ditto.
	* jv-exp.y: Ditto.
	* jv-lang.c: Ditto.
	* jv-lang.h: Ditto.
	* jv-typeprint.c: Ditto.
	* jv-valprint.c: Ditto.
	* language.c: Ditto.
	* language.h: Ditto.
	* linespec.c: Ditto.
	* linux-fork.c: Ditto.
	* linux-nat.c: Ditto.
	* linux-thread-db.c: Ditto.
	* lm32-tdep.c: Ditto.
This commit is contained in:
Michael Snyder
2011-01-09 03:08:57 +00:00
parent 0cb2acab06
commit 1777feb0fe
51 changed files with 1002 additions and 822 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
gdb/linux-nat.c
View File

@ -38,12 +38,12 @@
#include "inf-ptrace.h"
#include "auxv.h"
#include <sys/param.h> /* for MAXPATHLEN */
#include <sys/procfs.h> /* for elf_gregset etc. */
#include <sys/procfs.h> /* for elf_gregset etc. */
#include "elf-bfd.h" /* for elfcore_write_* */
#include "gregset.h" /* for gregset */
#include "gdbcore.h" /* for get_exec_file */
#include <ctype.h> /* for isdigit */
#include "gdbthread.h" /* for struct thread_info etc. */
#include "gdbthread.h" /* for struct thread_info etc. */
#include "gdb_stat.h" /* for struct stat */
#include <fcntl.h> /* for O_RDONLY */
#include "inf-loop.h"
@ -68,7 +68,7 @@
# endif
#endif /* HAVE_PERSONALITY */
/* This comment documents high-level logic of this file.
/* This comment documents high-level logic of this file.
Waiting for events in sync mode
===============================
@ -76,12 +76,12 @@ Waiting for events in sync mode
When waiting for an event in a specific thread, we just use waitpid, passing
the specific pid, and not passing WNOHANG.
When waiting for an event in all threads, waitpid is not quite good. Prior to
When waiting for an event in all threads, waitpid is not quite good. Prior to
version 2.4, Linux can either wait for event in main thread, or in secondary
threads. (2.4 has the __WALL flag). So, if we use blocking waitpid, we might
threads. (2.4 has the __WALL flag). So, if we use blocking waitpid, we might
miss an event. The solution is to use non-blocking waitpid, together with
sigsuspend. First, we use non-blocking waitpid to get an event in the main
process, if any. Second, we use non-blocking waitpid with the __WCLONED
process, if any. Second, we use non-blocking waitpid with the __WCLONED
flag to check for events in cloned processes. If nothing is found, we use
sigsuspend to wait for SIGCHLD. When SIGCHLD arrives, it means something
happened to a child process -- and SIGCHLD will be delivered both for events
@ -90,7 +90,7 @@ an event, we get back to calling nonblocking waitpid with and without
__WCLONED.
Note that SIGCHLD should be blocked between waitpid and sigsuspend calls,
so that we don't miss a signal. If SIGCHLD arrives in between, when it's
so that we don't miss a signal. If SIGCHLD arrives in between, when it's
blocked, the signal becomes pending and sigsuspend immediately
notices it and returns.
@ -167,7 +167,7 @@ blocked. */
#define PTRACE_SETOPTIONS 0x4200
#define PTRACE_GETEVENTMSG 0x4201
/* options set using PTRACE_SETOPTIONS */
/* Options set using PTRACE_SETOPTIONS. */
#define PTRACE_O_TRACESYSGOOD 0x00000001
#define PTRACE_O_TRACEFORK 0x00000002
#define PTRACE_O_TRACEVFORK 0x00000004
@ -297,7 +297,7 @@ static int linux_supports_tracesysgood_flag = -1;
static int linux_supports_tracevforkdone_flag = -1;
/* Async mode support */
/* Async mode support. */
/* Zero if the async mode, although enabled, is masked, which means
linux_nat_wait should behave as if async mode was off. */
@ -698,7 +698,7 @@ holding the child stopped. Try \"set detach-on-fork\" or \
{
struct lwp_info *child_lp = NULL;
/* We're already attached to the parent, by default. */
/* We're already attached to the parent, by default. */
/* Detach new forked process? */
if (detach_fork)
@ -2726,7 +2726,7 @@ stop_wait_callback (struct lwp_info *lp, void *data)
save_sigtrap (lp);
/* Now resume this LWP and get the SIGSTOP event. */
/* Now resume this LWP and get the SIGSTOP event. */
errno = 0;
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
if (debug_linux_nat)
@ -2741,12 +2741,12 @@ stop_wait_callback (struct lwp_info *lp, void *data)
target_pid_to_str (lp->ptid));
}
/* Hold this event/waitstatus while we check to see if
there are any more (we still want to get that SIGSTOP). */
there are any more (we still want to get that SIGSTOP). */
stop_wait_callback (lp, NULL);
/* Hold the SIGTRAP for handling by linux_nat_wait. If
there's another event, throw it back into the
queue. */
queue. */
if (lp->status)
{
if (debug_linux_nat)
@ -2757,14 +2757,14 @@ stop_wait_callback (struct lwp_info *lp, void *data)
kill_lwp (GET_LWP (lp->ptid), WSTOPSIG (lp->status));
}
/* Save the sigtrap event. */
/* Save the sigtrap event. */
lp->status = status;
return 0;
}
else
{
/* The thread was stopped with a signal other than
SIGSTOP, and didn't accidentally trip a breakpoint. */
SIGSTOP, and didn't accidentally trip a breakpoint. */
if (debug_linux_nat)
{
@ -2773,7 +2773,7 @@ stop_wait_callback (struct lwp_info *lp, void *data)
status_to_str ((int) status),
target_pid_to_str (lp->ptid));
}
/* Now resume this LWP and get the SIGSTOP event. */
/* Now resume this LWP and get the SIGSTOP event. */
errno = 0;
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
if (debug_linux_nat)
@ -2783,7 +2783,7 @@ stop_wait_callback (struct lwp_info *lp, void *data)
errno ? safe_strerror (errno) : "OK");
/* Hold this event/waitstatus while we check to see if
there are any more (we still want to get that SIGSTOP). */
there are any more (we still want to get that SIGSTOP). */
stop_wait_callback (lp, NULL);
/* If the lp->status field is still empty, use it to
@ -2887,7 +2887,7 @@ select_event_lwp_callback (struct lwp_info *lp, void *data)
gdb_assert (selector != NULL);
/* Select only resumed LWPs that have a SIGTRAP event pending. */
/* Select only resumed LWPs that have a SIGTRAP event pending. */
if (lp->resumed && linux_nat_lp_status_is_event (lp))
if ((*selector)-- == 0)
return 1;
@ -3065,7 +3065,7 @@ linux_nat_filter_event (int lwpid, int status, int options)
}
/* Make sure we don't report an event for the exit of an LWP not in
our list, i.e. not part of the current process. This can happen
our list, i.e. not part of the current process. This can happen
if we detach from a program we original forked and then it
exits. */
if (!WIFSTOPPED (status) && !lp)
@ -4569,7 +4569,7 @@ linux_nat_info_proc_cmd (char *args, int from_tty)
}
else
{
/* [...] (future options here) */
/* [...] (future options here). */
}
argv++;
}
@ -4769,9 +4769,9 @@ linux_nat_info_proc_cmd (char *args, int from_tty)
printf_filtered (_("Start of stack: 0x%lx\n"), ltmp);
#if 0 /* Don't know how architecture-dependent the rest is...
Anyway the signal bitmap info is available from "status". */
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
printf_filtered (_("Kernel stack pointer: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
printf_filtered (_("Kernel instr pointer: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%ld ", &ltmp) > 0)
printf_filtered (_("Pending signals bitmap: 0x%lx\n"), ltmp);
@ -4781,7 +4781,7 @@ linux_nat_info_proc_cmd (char *args, int from_tty)
printf_filtered (_("Ignored signals bitmap: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%ld ", &ltmp) > 0)
printf_filtered (_("Catched signals bitmap: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
if (fscanf (procfile, "%lu ", &ltmp) > 0) /* FIXME arch? */
printf_filtered (_("wchan (system call): 0x%lx\n"), ltmp);
#endif
do_cleanups (cleanup);