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* linux-low.c (STACK_SIZE): Define.

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(linux_tracefork_child): Use it.  Use __clone2 on ia64.
	(linux_test_for_tracefork): Likewise.
This commit is contained in:
Andreas Schwab
2007-12-21 16:04:27 +00:00
parent aeb5907d62
commit 7407e2de24
2 changed files with 23 additions and 4 deletions
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6
gdb/gdbserver/ChangeLog
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@ -1,3 +1,9 @@
2007-12-20 Andreas Schwab <schwab@suse.de>
* linux-low.c (STACK_SIZE): Define.
(linux_tracefork_child): Use it. Use __clone2 on ia64.
(linux_test_for_tracefork): Likewise.
2007-12-18 Daniel Jacobowitz <dan@codesourcery.com> 2007-12-18 Daniel Jacobowitz <dan@codesourcery.com>
* linux-low.c (linux_wait_for_event): Update messages. Do not * linux-low.c (linux_wait_for_event): Update messages. Do not

21
gdb/gdbserver/linux-low.c
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@ -1743,12 +1743,20 @@ linux_tracefork_grandchild (void *arg)
_exit (0); _exit (0);
} }
#define STACK_SIZE 4096
static int static int
linux_tracefork_child (void *arg) linux_tracefork_child (void *arg)
{ {
ptrace (PTRACE_TRACEME, 0, 0, 0); ptrace (PTRACE_TRACEME, 0, 0, 0);
kill (getpid (), SIGSTOP); kill (getpid (), SIGSTOP);
clone (linux_tracefork_grandchild, arg, CLONE_VM | SIGCHLD, NULL); #ifdef __ia64__
__clone2 (linux_tracefork_grandchild, arg, STACK_SIZE,
CLONE_VM | SIGCHLD, NULL);
#else
clone (linux_tracefork_grandchild, arg + STACK_SIZE,
CLONE_VM | SIGCHLD, NULL);
#endif
_exit (0); _exit (0);
} }
@ -1776,13 +1784,18 @@ linux_test_for_tracefork (void)
{ {
int child_pid, ret, status; int child_pid, ret, status;
long second_pid; long second_pid;
char *stack = malloc (8192); char *stack = malloc (STACK_SIZE * 4);
linux_supports_tracefork_flag = 0; linux_supports_tracefork_flag = 0;
/* Use CLONE_VM instead of fork, to support uClinux (no MMU). */ /* Use CLONE_VM instead of fork, to support uClinux (no MMU). */
child_pid = clone (linux_tracefork_child, stack + 2048, #ifdef __ia64__
CLONE_VM | SIGCHLD, stack + 6144); child_pid = __clone2 (linux_tracefork_child, stack, STACK_SIZE,
CLONE_VM | SIGCHLD, stack + STACK_SIZE * 2);
#else
child_pid = clone (linux_tracefork_child, stack + STACK_SIZE,
CLONE_VM | SIGCHLD, stack + STACK_SIZE * 2);
#endif
if (child_pid == -1) if (child_pid == -1)
perror_with_name ("clone"); perror_with_name ("clone");