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* mmap.cc (mlock): Add standard syscall return value debugging output.

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(munlock): Ditto.
(posix_madvise): Ditto.
* signal.cc: Remove obsolete sigcatchers stuff throughout.
(sigaction_worker): Add function name parameter and use it to show standard
syscall return value debugging output.  Also add fault protection.
(sigaction): Accommodate extra argument to sigaction_worker.
(siginterrupt): Ditto.
* syscalls.cc (read): Remove obsolete sigcatchers stuff.
(readv): Ditto.
This commit is contained in:
Christopher Faylor
2011-12-03 23:55:21 +00:00
parent 6455755743
commit 69864e48cb
4 changed files with 92 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,18 @@
2011-12-03 Christopher Faylor <me.cygwin2011@cgf.cx>
* mmap.cc (mlock): Add standard syscall return value debugging output.
(munlock): Ditto.
(posix_madvise): Ditto.
* signal.cc: Remove obsolete sigcatchers stuff throughout.
(sigaction_worker): Add function name parameter and use it to show
standard syscall return value debugging output. Also add fault
protection.
(sigaction): Accommodate extra argument to sigaction_worker.
(siginterrupt): Ditto.
* syscalls.cc (read): Remove obsolete sigcatchers stuff.
(readv): Ditto.
2011-12-03 Corinna Vinschen <vinschen@redhat.com>
* mmap.cc (mlock): Drop requesting SE_LOCK_MEMORY_PRIVILEGE. Drop

30
winsup/cygwin/mmap.cc
View File

@@ -1394,6 +1394,7 @@ mlock (const void *addr, size_t len)
}
while (status == STATUS_WORKING_SET_QUOTA);
syscall_printf ("%R = mlock(%p, %u)", ret, addr, len);
return ret;
}
@@ -1413,28 +1414,37 @@ munlock (const void *addr, size_t len)
else
ret = 0;
syscall_printf ("%R = munlock(%p, %u)", ret, addr, len);
return ret;
}
extern "C" int
posix_madvise (void *addr, size_t len, int advice)
{
int ret;
/* Check parameters. */
if (advice < POSIX_MADV_NORMAL || advice > POSIX_MADV_DONTNEED
|| !len)
return EINVAL;
/* Check requested memory area. */
MEMORY_BASIC_INFORMATION m;
char *p = (char *) addr;
char *endp = p + len;
while (p < endp)
ret = EINVAL;
else
{
if (!VirtualQuery (p, &m, sizeof m) || m.State == MEM_FREE)
return ENOMEM;
p = (char *) m.BaseAddress + m.RegionSize;
/* Check requested memory area. */
MEMORY_BASIC_INFORMATION m;
char *p = (char *) addr;
char *endp = p + len;
while (p < endp)
{
if (!VirtualQuery (p, &m, sizeof m) || m.State == MEM_FREE)
{
ret = ENOMEM;
break;
}
p = (char *) m.BaseAddress + m.RegionSize;
}
ret = 0;
}
syscall_printf ("%d = posix_madvise(%p, %u, %d)", ret, addr, len, advice);
/* Eventually do nothing. */
return 0;
}

122
winsup/cygwin/signal.cc
View File

@@ -23,32 +23,13 @@ details. */
#include "dtable.h"
#include "cygheap.h"
int sigcatchers; /* FIXME: Not thread safe. */
#define _SA_NORESTART 0x8000
static int sigaction_worker (int, const struct sigaction *, struct sigaction *, bool)
static int sigaction_worker (int, const struct sigaction *, struct sigaction *, bool, const char *)
__attribute__ ((regparm (3)));
#define sigtrapped(func) ((func) != SIG_IGN && (func) != SIG_DFL)
static inline void
set_sigcatchers (void (*oldsig) (int), void (*cursig) (int))
{
#ifdef DEBUGGING
int last_sigcatchers = sigcatchers;
#endif
if (!sigtrapped (oldsig) && sigtrapped (cursig))
sigcatchers++;
else if (sigtrapped (oldsig) && !sigtrapped (cursig))
sigcatchers--;
#ifdef DEBUGGING
if (last_sigcatchers != sigcatchers)
sigproc_printf ("last %d, old %d, cur %p, cur %p", last_sigcatchers,
sigcatchers, oldsig, cursig);
#endif
}
extern "C" _sig_func_ptr
signal (int sig, _sig_func_ptr func)
{
@@ -74,8 +55,6 @@ signal (int sig, _sig_func_ptr func)
gs.sa_handler = func;
gs.sa_flags &= ~SA_SIGINFO;
set_sigcatchers (prev, func);
syscall_printf ("%p = signal (%d, %p)", prev, sig, func);
return prev;
}
@@ -407,63 +386,68 @@ abort (void)
}
static int
sigaction_worker (int sig, const struct sigaction *newact, struct sigaction *oldact, bool isinternal)
sigaction_worker (int sig, const struct sigaction *newact,
struct sigaction *oldact, bool isinternal, const char *fnname)
{
sig_dispatch_pending ();
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG)
int res = -1;
myfault efault;
if (!efault.faulted (EFAULT))
{
set_errno (EINVAL);
sigproc_printf ("signal %d, newact %p, oldact %p", sig, newact, oldact);
syscall_printf ("SIG_ERR = sigaction signal %d out of range", sig);
return -1;
}
struct sigaction oa = global_sigs[sig];
if (!newact)
sigproc_printf ("signal %d, newact %p, oa %p", sig, newact, oa, oa.sa_handler);
else
{
sigproc_printf ("signal %d, newact %p (handler %p), oa %p", sig, newact, newact->sa_handler, oa, oa.sa_handler);
if (sig == SIGKILL || sig == SIGSTOP)
sig_dispatch_pending ();
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG)
set_errno (EINVAL);
else
{
set_errno (EINVAL);
return -1;
}
struct sigaction na = *newact;
struct sigaction& gs = global_sigs[sig];
if (!isinternal)
na.sa_flags &= ~_SA_INTERNAL_MASK;
gs = na;
if (!(gs.sa_flags & SA_NODEFER))
gs.sa_mask |= SIGTOMASK(sig);
if (gs.sa_handler == SIG_IGN)
sig_clear (sig);
if (gs.sa_handler == SIG_DFL && sig == SIGCHLD)
sig_clear (sig);
set_sigcatchers (oa.sa_handler, gs.sa_handler);
if (sig == SIGCHLD)
{
myself->process_state &= ~PID_NOCLDSTOP;
if (gs.sa_flags & SA_NOCLDSTOP)
myself->process_state |= PID_NOCLDSTOP;
struct sigaction oa = global_sigs[sig];
if (!newact)
sigproc_printf ("signal %d, newact %p, oa %p", sig, newact, oa, oa.sa_handler);
else
{
sigproc_printf ("signal %d, newact %p (handler %p), oa %p", sig, newact, newact->sa_handler, oa, oa.sa_handler);
if (sig == SIGKILL || sig == SIGSTOP)
{
set_errno (EINVAL);
goto out;
}
struct sigaction na = *newact;
struct sigaction& gs = global_sigs[sig];
if (!isinternal)
na.sa_flags &= ~_SA_INTERNAL_MASK;
gs = na;
if (!(gs.sa_flags & SA_NODEFER))
gs.sa_mask |= SIGTOMASK(sig);
if (gs.sa_handler == SIG_IGN)
sig_clear (sig);
if (gs.sa_handler == SIG_DFL && sig == SIGCHLD)
sig_clear (sig);
if (sig == SIGCHLD)
{
myself->process_state &= ~PID_NOCLDSTOP;
if (gs.sa_flags & SA_NOCLDSTOP)
myself->process_state |= PID_NOCLDSTOP;
}
}
if (oldact)
{
*oldact = oa;
oa.sa_flags &= ~_SA_INTERNAL_MASK;
}
res = 0;
}
}
if (oldact)
{
*oldact = oa;
oa.sa_flags &= ~_SA_INTERNAL_MASK;
}
return 0;
out:
syscall_printf ("%R = %s(%d, %p, %p)", res, fnname, sig, newact, oldact);
return res;
}
extern "C" int
sigaction (int sig, const struct sigaction *newact, struct sigaction *oldact)
{
return sigaction_worker (sig, newact, oldact, false);
return sigaction_worker (sig, newact, oldact, false, "sigaction");
}
extern "C" int
@@ -560,7 +544,7 @@ siginterrupt (int sig, int flag)
act.sa_flags &= ~_SA_NORESTART;
act.sa_flags |= SA_RESTART;
}
return sigaction_worker (sig, &act, NULL, true);
return sigaction_worker (sig, &act, NULL, true, "siginterrupt");
}
extern "C" int

12
winsup/cygwin/syscalls.cc
View File

@@ -1066,10 +1066,8 @@ read (int fd, void *ptr, size_t len)
}
/* Could block, so let user know we at least got here. */
extern int sigcatchers;
syscall_printf ("read (%d, %p, %d) %sblocking, sigcatchers %d",
fd, ptr, len, cfd->is_nonblocking () ? "non" : "",
sigcatchers);
syscall_printf ("read (%d, %p, %d) %sblocking",
fd, ptr, len, cfd->is_nonblocking () ? "non" : "");
cfd->read (ptr, res = len);
@@ -1110,10 +1108,8 @@ readv (int fd, const struct iovec *const iov, const int iovcnt)
}
/* Could block, so let user know we at least got here. */
extern int sigcatchers;
syscall_printf ("readv (%d, %p, %d) %sblocking, sigcatchers %d",
fd, iov, iovcnt, cfd->is_nonblocking () ? "non" : "",
sigcatchers);
syscall_printf ("readv (%d, %p, %d) %sblocking",
fd, iov, iovcnt, cfd->is_nonblocking () ? "non" : "");
res = cfd->readv (iov, iovcnt, tot);