X-Git-Url: https://git.archive.openwrt.org/?a=blobdiff_plain;f=toolchain%2Fgdb%2Fpatches%2F730-debian_gdb-fix-tracefork-check.patch;fp=toolchain%2Fgdb%2Fpatches%2F730-debian_gdb-fix-tracefork-check.patch;h=0000000000000000000000000000000000000000;hb=122ba8031d2311429e94014ad98849c51b3b634f;hp=9890d80c3ed0f40eb4ac65a23408359afb5affcd;hpb=fe7c7b42a586b5fe927546bd31f1a238cbbab050;p=openwrt.git diff --git a/toolchain/gdb/patches/730-debian_gdb-fix-tracefork-check.patch b/toolchain/gdb/patches/730-debian_gdb-fix-tracefork-check.patch deleted file mode 100644 index 9890d80c3e..0000000000 --- a/toolchain/gdb/patches/730-debian_gdb-fix-tracefork-check.patch +++ /dev/null @@ -1,225 +0,0 @@ -Status: submitted for comments - -2004-11-12 Daniel Jacobowitz - - * linux-nat.c (my_waitpid): New function. - (linux_test_for_tracefork): Make more robust and verbose. Take - an ORIGINAL_PID argument and test for PTRACE_SETOPTIONS first. - (linux_supports_tracefork, linux_supports_tracevforkdone): Take a PID - argument. Update calls to linux_test_for_tracefork. - (linux_enable_event_reporting, child_follow_fork) - (child_insert_fork_catchpoint, child_insert_vfork_catchpoint) - (child_insert_exec_catchpoint): Update calls to - linux_supports_tracefork and linux_supports_tracevforkdone. - -Index: gdb-6.3/gdb/linux-nat.c -=================================================================== ---- gdb-6.3.orig/gdb/linux-nat.c 2004-10-08 16:29:47.000000000 -0400 -+++ gdb-6.3/gdb/linux-nat.c 2004-11-13 16:41:51.368720845 -0500 -@@ -150,18 +150,47 @@ linux_tracefork_child (void) - exit (0); - } - --/* Determine if PTRACE_O_TRACEFORK can be used to follow fork events. We -+/* Wrapper function for waitpid which handles EINTR. */ -+ -+static int -+my_waitpid (int pid, int *status, int flags) -+{ -+ int ret; -+ do -+ { -+ ret = waitpid (pid, status, flags); -+ } -+ while (ret == -1 && errno == EINTR); -+ -+ return ret; -+} -+ -+/* Determine if PTRACE_O_TRACEFORK can be used to follow fork events. -+ -+ First, we try to enable fork tracing on ORIGINAL_PID. If this fails, -+ we know that the feature is not available. This may change the tracing -+ options for ORIGINAL_PID, but we'll be setting them shortly anyway. -+ -+ However, if it succeeds, we don't know for sure that the feature is -+ available; old versions of PTRACE_SETOPTIONS ignored unknown options. We - create a child process, attach to it, use PTRACE_SETOPTIONS to enable -- fork tracing, and let it fork. If the process exits, we assume that -- we can't use TRACEFORK; if we get the fork notification, and we can -- extract the new child's PID, then we assume that we can. */ -+ fork tracing, and let it fork. If the process exits, we assume that we -+ can't use TRACEFORK; if we get the fork notification, and we can extract -+ the new child's PID, then we assume that we can. */ - - static void --linux_test_for_tracefork (void) -+linux_test_for_tracefork (int original_pid) - { - int child_pid, ret, status; - long second_pid; - -+ linux_supports_tracefork_flag = 0; -+ linux_supports_tracevforkdone_flag = 0; -+ -+ ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACEFORK); -+ if (ret != 0) -+ return; -+ - child_pid = fork (); - if (child_pid == -1) - perror_with_name ("linux_test_for_tracefork: fork"); -@@ -169,7 +198,7 @@ linux_test_for_tracefork (void) - if (child_pid == 0) - linux_tracefork_child (); - -- ret = waitpid (child_pid, &status, 0); -+ ret = my_waitpid (child_pid, &status, 0); - if (ret == -1) - perror_with_name ("linux_test_for_tracefork: waitpid"); - else if (ret != child_pid) -@@ -177,13 +206,23 @@ linux_test_for_tracefork (void) - if (! WIFSTOPPED (status)) - error ("linux_test_for_tracefork: waitpid: unexpected status %d.", status); - -- linux_supports_tracefork_flag = 0; -- - ret = ptrace (PTRACE_SETOPTIONS, child_pid, 0, PTRACE_O_TRACEFORK); - if (ret != 0) - { -- ptrace (PTRACE_KILL, child_pid, 0, 0); -- waitpid (child_pid, &status, 0); -+ ret = ptrace (PTRACE_KILL, child_pid, 0, 0); -+ if (ret != 0) -+ { -+ warning ("linux_test_for_tracefork: failed to kill child"); -+ return; -+ } -+ -+ ret = my_waitpid (child_pid, &status, 0); -+ if (ret != child_pid) -+ warning ("linux_test_for_tracefork: failed to wait for killed child"); -+ else if (!WIFSIGNALED (status)) -+ warning ("linux_test_for_tracefork: unexpected wait status 0x%x from " -+ "killed child", status); -+ - return; - } - -@@ -192,8 +231,12 @@ linux_test_for_tracefork (void) - PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORKDONE); - linux_supports_tracevforkdone_flag = (ret == 0); - -- ptrace (PTRACE_CONT, child_pid, 0, 0); -- ret = waitpid (child_pid, &status, 0); -+ ret = ptrace (PTRACE_CONT, child_pid, 0, 0); -+ if (ret != 0) -+ warning ("linux_test_for_tracefork: failed to resume child"); -+ -+ ret = my_waitpid (child_pid, &status, 0); -+ - if (ret == child_pid && WIFSTOPPED (status) - && status >> 16 == PTRACE_EVENT_FORK) - { -@@ -204,34 +247,38 @@ linux_test_for_tracefork (void) - int second_status; - - linux_supports_tracefork_flag = 1; -- waitpid (second_pid, &second_status, 0); -- ptrace (PTRACE_DETACH, second_pid, 0, 0); -+ my_waitpid (second_pid, &second_status, 0); -+ ret = ptrace (PTRACE_KILL, second_pid, 0, 0); -+ if (ret != 0) -+ warning ("linux_test_for_tracefork: failed to kill second child"); - } - } -+ else -+ warning ("linux_test_for_tracefork: unexpected result from waitpid " -+ "(%d, status 0x%x)", ret, status); - -- if (WIFSTOPPED (status)) -- { -- ptrace (PTRACE_DETACH, child_pid, 0, 0); -- waitpid (child_pid, &status, 0); -- } -+ ret = ptrace (PTRACE_KILL, child_pid, 0, 0); -+ if (ret != 0) -+ warning ("linux_test_for_tracefork: failed to kill child"); -+ my_waitpid (child_pid, &status, 0); - } - - /* Return non-zero iff we have tracefork functionality available. - This function also sets linux_supports_tracefork_flag. */ - - static int --linux_supports_tracefork (void) -+linux_supports_tracefork (int pid) - { - if (linux_supports_tracefork_flag == -1) -- linux_test_for_tracefork (); -+ linux_test_for_tracefork (pid); - return linux_supports_tracefork_flag; - } - - static int --linux_supports_tracevforkdone (void) -+linux_supports_tracevforkdone (int pid) - { - if (linux_supports_tracefork_flag == -1) -- linux_test_for_tracefork (); -+ linux_test_for_tracefork (pid); - return linux_supports_tracevforkdone_flag; - } - -@@ -242,12 +289,12 @@ linux_enable_event_reporting (ptid_t pti - int pid = ptid_get_pid (ptid); - int options; - -- if (! linux_supports_tracefork ()) -+ if (! linux_supports_tracefork (pid)) - return; - - options = PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK | PTRACE_O_TRACEEXEC - | PTRACE_O_TRACECLONE; -- if (linux_supports_tracevforkdone ()) -+ if (linux_supports_tracevforkdone (pid)) - options |= PTRACE_O_TRACEVFORKDONE; - - /* Do not enable PTRACE_O_TRACEEXIT until GDB is more prepared to support -@@ -308,7 +355,8 @@ child_follow_fork (int follow_child) - - if (has_vforked) - { -- if (linux_supports_tracevforkdone ()) -+ gdb_assert (linux_supports_tracefork_flag >= 0); -+ if (linux_supports_tracevforkdone (0)) - { - int status; - -@@ -476,7 +524,7 @@ linux_handle_extended_wait (int pid, int - int - child_insert_fork_catchpoint (int pid) - { -- if (! linux_supports_tracefork ()) -+ if (! linux_supports_tracefork (pid)) - error ("Your system does not support fork catchpoints."); - - return 0; -@@ -485,7 +533,7 @@ child_insert_fork_catchpoint (int pid) - int - child_insert_vfork_catchpoint (int pid) - { -- if (!linux_supports_tracefork ()) -+ if (!linux_supports_tracefork (pid)) - error ("Your system does not support vfork catchpoints."); - - return 0; -@@ -494,7 +542,7 @@ child_insert_vfork_catchpoint (int pid) - int - child_insert_exec_catchpoint (int pid) - { -- if (!linux_supports_tracefork ()) -+ if (!linux_supports_tracefork (pid)) - error ("Your system does not support exec catchpoints."); - - return 0;