diff options
Diffstat (limited to 'libdwfl/linux-pid-attach.c')
| -rw-r--r-- | libdwfl/linux-pid-attach.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libdwfl/linux-pid-attach.c b/libdwfl/linux-pid-attach.c index ae717028..076b2c3e 100644 --- a/libdwfl/linux-pid-attach.c +++ b/libdwfl/linux-pid-attach.c @@ -255,6 +255,11 @@ void internal_function __libdwfl_ptrace_detach (pid_t tid, bool tid_was_stopped) { + // Older kernels (tested kernel-2.6.18-348.12.1.el5.x86_64) need special + // handling of the detachment to keep the process State: T (stopped). + if (tid_was_stopped) + syscall (__NR_tkill, tid, SIGSTOP); + /* This handling is needed only on older Linux kernels such as 2.6.32-358.23.2.el6.ppc64. Later kernels such as 3.11.7-200.fc19.x86_64 remember the T (stopped) state @@ -262,6 +267,15 @@ __libdwfl_ptrace_detach (pid_t tid, bool tid_was_stopped) PTRACE_DETACH. */ ptrace (PTRACE_DETACH, tid, NULL, (void *) (intptr_t) (tid_was_stopped ? SIGSTOP : 0)); + + if (tid_was_stopped) + { + // Wait till the SIGSTOP settles down. + int i; + for (i = 0; i < 100000; i++) + if (linux_proc_pid_is_stopped (tid)) + break; + } } static void |