mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-11-27 03:51:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

* linux-low.c (linux_tracefork_grandchild): New.

Browse Source 
(linux_tracefork_child): Use clone.
	(linux_test_for_tracefork): Use clone; allocate and free a stack.
This commit is contained in:
Daniel Jacobowitz 2007-11-01 19:19:39 +00:00
parent 7ce189b305
commit 51c2684ec1
2 changed files with 23 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,9 @@
2007-11-01 Daniel Jacobowitz <dan@codesourcery.com>
* linux-low.c (linux_tracefork_grandchild): New.
(linux_tracefork_child): Use clone.
(linux_test_for_tracefork): Use clone; allocate and free a stack.
2007-10-31 Joel Brobecker <brobecker@adacore.com>
* Makefile.in: Use $(SHELL) instead of "sh" to call regdat.sh.

26
gdb/gdbserver/linux-low.c
View File

@ -1732,14 +1732,20 @@ linux_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
static int linux_supports_tracefork_flag;
/* A helper function for linux_test_for_tracefork, called after fork (). */
/* Helper functions for linux_test_for_tracefork, called via clone (). */
static void
linux_tracefork_child (void)
static int
linux_tracefork_grandchild (void *arg)
{
_exit (0);
}
static int
linux_tracefork_child (void *arg)
{
ptrace (PTRACE_TRACEME, 0, 0, 0);
kill (getpid (), SIGSTOP);
fork ();
clone (linux_tracefork_grandchild, arg, CLONE_VM | SIGCHLD, NULL);
_exit (0);
}
@ -1767,15 +1773,15 @@ linux_test_for_tracefork (void)
{
int child_pid, ret, status;
long second_pid;
char *stack = malloc (8192);
linux_supports_tracefork_flag = 0;
child_pid = fork ();
/* Use CLONE_VM instead of fork, to support uClinux (no MMU). */
child_pid = clone (linux_tracefork_child, stack + 2048,
CLONE_VM | SIGCHLD, stack + 6144);
if (child_pid == -1)
perror_with_name ("fork");
if (child_pid == 0)
linux_tracefork_child ();
perror_with_name ("clone");
ret = my_waitpid (child_pid, &status, 0);
if (ret == -1)
@ -1840,6 +1846,8 @@ linux_test_for_tracefork (void)
my_waitpid (child_pid, &status, 0);
}
while (WIFSTOPPED (status));
free (stack);
}