When truss is detaching from very active process it is possible to
hang on waitpid(2) in restore_proc() forever, because
ptrace(PT_SYSCALL) must be called before detaching, to allow the
debugging process to continue execution. Also when truss called with
'-c' argument, it does not print anything after detach, because it
immediately exits from restore_proc().
To fix these two problems make detaching deferred, but then it is
impossible to detach from a process which does not do any system call.
To fix this issue use sigaction(2) instead of signal(3) to disable
SA_RESTART flag for waitpid(2) that makes it non-restartable. Remove
global variable child_pid, because now detaching is handled in context
where child's pid is known.
Reported by: mjg
Tested by: mjg, swills
Approved by: kib (mentor)
MFC after: 2 weeks
This structure is not part of POSIX. According to POSIX, gettimeofday()
has the following prototype:
int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
Also, POSIX states that gettimeofday() shall return 0 (as long as tzp is
not used). Remove dead error handling code. Also use NULL for a
nul-pointer instead of integer 0.
While there, change all pieces of code that only use tv_sec to use
time(3), as this provides less overhead.
r238211:
Support TARGET_ARCH=armv6 and TARGET_ARCH=armv6eb
This adds a new TARGET_ARCH for building on ARM
processors that support the ARMv6K multiprocessor
extensions. In particular, these processors have
better support for TLS and mutex operations.
This mostly touches a lot of Makefiles to extend
existing patterns for inferring CPUARCH from ARCH.
It also configures:
* GCC to default to arm1176jz-s
* GCC to predefine __FreeBSD_ARCH_armv6__
* gas to default to ARM_ARCH_V6K
* uname -p to return 'armv6'
* make so that MACHINE_ARCH defaults to 'armv6'
It also changes a number of headers to use
the compiler __ARM_ARCH_XXX__ macros to configure
processor-specific support routines.
Submitted by: Tim Kientzle <kientzle@freebsd.org>
variable to NULL, to avoid using it uninitialized in certain cases.
This fixes the following clang 3.2 warning:
usr.bin/make/var.c:1770:10: error: variable 'error' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
if (vp->execute) {
^~~~~~~~~~~
usr.bin/make/var.c:1777:10: note: uninitialized use occurs here
if (error)
^~~~~
usr.bin/make/var.c:1770:6: note: remove the 'if' if its condition is always true
if (vp->execute) {
^~~~~~~~~~~~~~~~~
usr.bin/make/var.c:1768:23: note: initialize the variable 'error' to silence this warning
const char *error;
^
= NULL
MFC after: 1 week
If -ignore_readdir_race is present, [ENOENT] errors caused by deleting a
file after find has read its name from a directory are ignored.
Formerly, -ignore_readdir_race did nothing.
PR: bin/169723
Submitted by: Valery Khromov and Andrey Ignatov
- Change default sort method to mergesort, which has a better worst case
performance than qsort
Submitted by: Oleg Moskalenko <oleg.moskalenko@citrix.com>
living process as a zombie and refuses to kill it. The cause is that
the code masks ki_stat with SZOMB to compare with SZOMB, but ki_stat
is not a mask.
Possibly reported by: cperciva
MFC after: 3 days
