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PR libc/11214:
	* linux-low.c (linux_tracefork_child) [!(__UCLIBC__ && HAS_NOMMU)]: New.
	(linux_test_for_tracefork): Move `stack' into [__UCLIBC__ && HAS_NOMMU].
	(linux_test_for_tracefork) [!(__UCLIBC__ && HAS_NOMMU)]: New.

gdb/testsuite/
	PR libc/11214:
	* gdb.threads/current-lwp-dead.c: Include features.h.
	(HAS_NOMMU): New.
	(fn, main): Move CLONE_VM into [__UCLIBC__ && HAS_NOMMU].
This commit is contained in:
Jan Kratochvil
2010-02-01 20:19:06 +00:00
parent 7618e12bcb
commit e4b7f41c57
4 changed files with 60 additions and 7 deletions
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30
gdb/gdbserver/linux-low.c
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@@ -2597,6 +2597,14 @@ linux_tracefork_child (void *arg)
{
ptrace (PTRACE_TRACEME, 0, 0, 0);
kill (getpid (), SIGSTOP);
#if !(defined(__UCLIBC__) && defined(HAS_NOMMU))
if (fork () == 0)
linux_tracefork_grandchild (NULL);
#else /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
#ifdef __ia64__
__clone2 (linux_tracefork_grandchild, arg, STACK_SIZE,
CLONE_VM | SIGCHLD, NULL);
@@ -2604,6 +2612,9 @@ linux_tracefork_child (void *arg)
clone (linux_tracefork_grandchild, arg + STACK_SIZE,
CLONE_VM | SIGCHLD, NULL);
#endif
#endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
_exit (0);
}
@@ -2616,18 +2627,31 @@ linux_test_for_tracefork (void)
{
int child_pid, ret, status;
long second_pid;
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
char *stack = xmalloc (STACK_SIZE * 4);
#endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
linux_supports_tracefork_flag = 0;
#if !(defined(__UCLIBC__) && defined(HAS_NOMMU))
child_pid = fork ();
if (child_pid == 0)
linux_tracefork_child (NULL);
#else /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
/* Use CLONE_VM instead of fork, to support uClinux (no MMU). */
#ifdef __ia64__
child_pid = __clone2 (linux_tracefork_child, stack, STACK_SIZE,
CLONE_VM | SIGCHLD, stack + STACK_SIZE * 2);
#else
#else /* !__ia64__ */
child_pid = clone (linux_tracefork_child, stack + STACK_SIZE,
CLONE_VM | SIGCHLD, stack + STACK_SIZE * 2);
#endif
#endif /* !__ia64__ */
#endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
if (child_pid == -1)
perror_with_name ("clone");
@@ -2696,7 +2720,9 @@ linux_test_for_tracefork (void)
}
while (WIFSTOPPED (status));
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
free (stack);
#endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */
}