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Implement qual_flags support for each personality.
* strace.c (main): Move qualify calls after set_personality call.
* syscall.c (qual_flags0): New variable..
[SUPPORTED_PERSONALITIES >= 2] (qual_flags1): New variable.
[SUPPORTED_PERSONALITIES >= 3] (qual_flags2): New variable.
(qual_flags): Change variable definition from array to pointer.
(set_personality): Initialize qual_flags variable.
(qualify_one): Add "pers" argument to specify personality.
[SUPPORTED_PERSONALITIES >= 2]: Set qual_flags1 if requested.
[SUPPORTED_PERSONALITIES >= 3]: Set qual_flags2 if requested.
(qual_syscall): Pass personality to qualify_one.
[SUPPORTED_PERSONALITIES >= 2]: Look for syscall also in sysent1
table.
[SUPPORTED_PERSONALITIES >= 3]: Look for syscall also in sysent2
table.
(qual_signal): Pass personality to qualify_one.
(qual_desc): Likewise.
(qualify): Use qualify_one instead of manual qual_flags
manipulations.
[SUPPORTED_PERSONALITIES >= 2]: Look for syscall also in sysent1
table.
[SUPPORTED_PERSONALITIES >= 3]: Look for syscall also in sysent2
table.
* defs.h: Update qual_flags declaration.
Fixes RH#173986.
* strace.c (detach): If detaching the last live thread in a group with
a zombie leader, then detach the leader too.
(handle_group_exit): Use detach, not droptcb, for predeceased thread.
Mark process about to take a signal with TCB_GROUP_EXITING flag.
Fixes RH#161919.
* strace.c (handle_group_exit): Don't detach leader that wasn't
TCB_ATTACHED. Instead mark it with TCB_GROUP_EXITING.
Remove droptcb loop at end, no longer required since 2.6 reports each
thread death.
Fixes RH#135254.
* strace.c (trace): Use handle_group_exit for non-TCB_ATTACHED child
taking signal when it has nclone_threads > 0.
* strace.c (handle_group_exit): Don't detach leader that wasn't
TCB_ATTACHED.
* strace.c (handle_group_exit, trace): Mark leader with
TCB_GROUP_EXITING and don't be surprised at child deaths when their
leader has it set.
Fixes RH#132150.
* strace.c (main) [LINUX]: Expand TCBTAB as necessary for threads
attached. Attach threads only under -f. Set TCB_FOLLOWFORK in them.
(expand_tcbtab): New function, broken out of ...
* process.c (fork_tcb): ... here, call that.
* defs.h: Declare expand_tcbtab.
* strace.c (main): Treat piped output more like file output.
Disallow -ff with piped output. Fixes RH#105366.
Reported by Dmitry V. Levin <ldv@altlinux.org>
* strace.c (main): Set -q when given -o and not -p, and not when not
given -o, to match what the man page always said.
Fixes Debian bug #47113, #153678.
* defs.h (struct tcb): New member `nzombies'.
* strace.c (alloctcb): Initialize it.
(droptcb): Increment our parent's zombie count.
* process.c (internal_wait): Don't go into TCB_SUSPENDED if the
process has zombies it can reap. On the way out, if we reaped
an untraced process, decrement the zombie count.
* strace.c (usage): Omit -z, since it has never worked properly.
* NEWS: Likewise.
* strace.c (main): Grok new option `-E var=val' or `-E var' to put
var=val in environ or to remove var, respectively.
(usage): Mention it.
* strace.1, NEWS: Document it.
Support for new Linux 2.5 thread features.
* defs.h [LINUX]: Define __NR_exit_group if not defined.
(struct tcb): New members nclone_threads, nclone_detached,
and nclone_waiting.
(TCB_CLONE_DETACHED, TCB_CLONE_THREAD, TCB_GROUP_EXITING): New macros.
(waiting_parent): Macro removed.
(pid2tcb): Declare it.
* process.c (internal_clone) [TCB_CLONE_THREAD]: Reparent the new
child to our parent if we are a CLONE_THREAD child ourselves.
Maintain TCB_CLONE_THREAD and TCB_CLONE_DETACHED flags and counts.
(internal_wait) [TCB_CLONE_THREAD]: Factor out detached children when
determining if we have any. If TCB_CLONE_THREAD is set, check
parent's children instead of our own, and bump nclone_waiting count.
(internal_exit) [__NR_exit_group]: Set the TCB_GROUP_EXITING flag if
the syscall was exit_group.
* syscall.c (internal_syscall): Use internal_exit for exit_group.
* strace.c (pid2tcb): No longer static.
(alloctcb) [TCB_CLONE_THREAD]: Initialize new fields.
(droptcb) [TCB_CLONE_THREAD]: Maintain new fields.
If we have thread children, set TCB_EXITING and don't clear the TCB.
(resume) [TCB_CLONE_THREAD]: Decrement parent's nclone_waiting.
(detach) [TCB_CLONE_THREAD]: When calling resume, check all thread
children of our parent that might be waiting for us too.
[TCB_GROUP_EXITING] (handle_group_exit): New function.
(trace) [TCB_GROUP_EXITING]: Use that in place of detach or droptcb.
Revamp -f support for Linux.
* util.c [LINUX] (setbpt, clearbpt): New implementations that tweak
the system call to be clone with CLONE_PTRACE set. Various new static
helper functions.
* process.c (internal_clone): Define also #ifdef SYS_clone2.
Initialize TCPCHILD->parent field.
[CLONE_PTRACE]: Don't do PTRACE_ATTACH here, because it's preattached.
Check in case the new child is in the tcb already.
(internal_fork) [LINUX]: Just call internal_clone.
* strace.c (trace) [LINUX]: Under -f/-F, grok an unknown pid
reporting to wait, put it in the TCB with TCB_ATTACHED|TCB_SUSPENDED.
* strace.c (tcbtab): Make this a pointer to pointers, not an array.
(tcbtabsize): New variable.
(main): Initialize them using dynamic allocation.
(alloctcb, main): Use tcbtabsize in place of MAX_PROCS; indirect.
(pid2tcb, cleanup): Likewise.
[USE_PROCFS] (pollv): Make this a pointer, not an array; make static.
(rebuild_pollv): Dynamically allocate the vector.
* defs.h (tcbtab): Update decls.
(MAX_PROCS): Macro removed, no more static limit on this.
* process.c (fork_tcb): New function.
(internal_clone, internal_fork): Use it instead of checking nprocs.
Another bunch of patches from John Hughes merged:
signal.c:
+ SVR4 printcontext(): sigset_t != sigset_t*
+ getcontext returns a value, so print on exit of syscall
+ add UC_FP to ucontext_flags for OS writers that can't spell
+ sys_signal(): special case SIG_{ERR,DFL,IGN}
+ decode_subcall(): only do subcall range checking when needed
bunch of UnixWare updates
aclocal.m4, acconfig.h, configure.in: add test for long long type
test/.cvsignore: new file
defs.h: Up maximum number of traced processed to 64
strace.c: Disable some debugging code from davidm
implement setarg for more architectures
implement change_syscall
