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Refactor to avoid nonnull checks on "this" pointer.

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G++ 6.0 asserts that the "this" pointer is non-null for member
functions.
Refactor methods that check if "this" is non-null to resolve this.

winsup/cygwin/ChangeLog:
external.cc (cygwin_internal): Check for a null pinfo before calling
cmdline.
fhandler_dsp.cc (Audio::blockSize): Make static.
fhandler_dsp.cc (Audio_in): add default_buf_info.
fhandler_dsp.cc (Audio_out): Ditto.
fhandler_dsp.cc (Audio_out::buf_info): Refactor method to call
default_buf_info if dev_ is null.
fhandler_dsp.cc (Audio_in::buf_info): Ditto.
fhandler_dsp.cc (fhandler_dev_dsp::_ioctl): Call Audio_out::default_buf_info if audio_out_ is null.
fhandler_dsp.cc (fhandler_dev_dsp::_ioctl): Call Audio_in::default_buf_info if audio_in_ is null.
fhandler_process.cc (format_process_fd): Check if pinfo is null.
fhandler_process.cc (format_process_root): Ditto.
fhandler_process.cc (format_process_cwd): Ditto.
fhandler_process.cc (format_process_cmdline): Ditto.
signal.cc (tty_min::kill_pgrp): Ditto.
signal.cc (_pinfo::kill0): Ditto.
sigproc.cc (pid_exists): Ditto.
sigproc.cc (remove_proc): Ditto.
times.cc (clock_gettime): Ditto.
times.cc (clock_getcpuclockid): Ditto.
path.cc (cwdstuff::override_win32_cwd): Check if old_cwd is null.
path.cc (fcwd_access_t::Free): Factor null check of "this" out to
caller(s).
pinfo.cc (_pinfo::exists): Ditto.
pinfo.cc (_pinfo::fd): Ditto.
pinfo.cc (_pinfo::fds): Ditto.
pinfo.cc (_pinfo::root): Ditto.
pinfo.cc (_pinfo::cwd): Ditto.
pinfo.cc (_pinfo::cmdline): Ditto.
signal.cc (_pinfo::kill): Ditto.
pinfo.cc (_pinfo::commune_request): remove non-null check on "this", as
this method is only called from pinfo.cc after null checks
pinfo.cc (_pinfo::pipe_fhandler): remove non-null check on "this", as
this method is only called from pipe.cc (fhandler_pipe::open) after a null check.

Signed-off-by: Peter Foley <pefoley2@pefoley.com>
This commit is contained in:
Peter Foley
2016-04-02 11:36:18 -04:00
committed by Corinna Vinschen
parent e7e6119241
commit 0008bdea02
9 changed files with 75 additions and 38 deletions
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11
winsup/cygwin/fhandler_process.cc
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@ -371,6 +371,11 @@ format_process_fd (void *data, char *&destbuf)
case a trailing slash and more followup chars are allowed, provided the
descriptor symlink points to a directory. */
char *fdp = strchr (path, '/') + 3;
if (!p)
{
set_errno (ENOENT);
return 0;
}
/* The "fd" directory itself? */
if (fdp[0] =='\0' || (fdp[0] == '/' && fdp[1] == '\0'))
{
@ -479,7 +484,7 @@ format_process_root (void *data, char *&destbuf)
cfree (destbuf);
destbuf = NULL;
}
destbuf = p->root (fs);
destbuf = p ? p->root (fs) : NULL;
if (!destbuf || !*destbuf)
{
destbuf = cstrdup ("<defunct>");
@ -499,7 +504,7 @@ format_process_cwd (void *data, char *&destbuf)
cfree (destbuf);
destbuf = NULL;
}
destbuf = p->cwd (fs);
destbuf = p ? p->cwd (fs) : NULL;
if (!destbuf || !*destbuf)
{
destbuf = cstrdup ("<defunct>");
@ -519,7 +524,7 @@ format_process_cmdline (void *data, char *&destbuf)
cfree (destbuf);
destbuf = NULL;
}
destbuf = p->cmdline (fs);
destbuf = p ? p->cmdline (fs) : NULL;
if (!destbuf || !*destbuf)
{
destbuf = cstrdup ("<defunct>");