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| author | bibo,mao <bibo.mao@intel.com> | 2007-01-30 03:02:19 (GMT) |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-02-05 22:04:21 (GMT) |
| commit | 87f76d3aafe5b5e0a1d6d857088a0263b35afa6b (patch) | |
| tree | 80a547e0c0a0cfe2eb1764b7a2b6410cbe5463f8 /arch | |
| parent | ae0af3e3462fdada42deba30479aba70c6cf8b72 (diff) | |
| download | linux-87f76d3aafe5b5e0a1d6d857088a0263b35afa6b.tar.xz | |
[IA64] find thread for user rbs address
I encountered one problem when running ptrace test case the situation
is this: traced process's syscall parameter needs to be accessed, but
for sys_clone system call with clone_flag (CLONE_VFORK | CLONE_VM |
SIGCHLD) parameter. This syscall's parameter accessing result is wrong.
The reason is that vforked child process mm point is the same, but
tgid is different. Without this patch find_thread_for_addr will return
vforked process if vforked process is also stopped, but not the thread
which calls vfork syscall.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c index f1ec129..3f89187 100644 --- a/arch/ia64/kernel/ptrace.c +++ b/arch/ia64/kernel/ptrace.c @@ -607,7 +607,7 @@ find_thread_for_addr (struct task_struct *child, unsigned long addr) */ list_for_each_safe(this, next, ¤t->children) { p = list_entry(this, struct task_struct, sibling); - if (p->mm != mm) + if (p->tgid != child->tgid) continue; if (thread_matches(p, addr)) { child = p; |