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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-17 13:47:15 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 14:34:54 -0800 |
commit | cf7492e933c0df200f8fa46c3684e8bd20890ab2 (patch) | |
tree | 5cda24e7cb12be776f05adee52dae2a3debf4217 /scripts/gdb/linux | |
parent | b24e2d21ac6efd23a67652870fac0cfb943d2264 (diff) | |
download | op-kernel-dev-cf7492e933c0df200f8fa46c3684e8bd20890ab2.zip op-kernel-dev-cf7492e933c0df200f8fa46c3684e8bd20890ab2.tar.gz |
scripts/gdb: add internal helper and convenience function to retrieve thread_info
Add the internal helper get_thread_info that calculates the thread_info
from a given task variable. Also export this service as a convenience
function.
Note: ia64 version is untested.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/gdb/linux')
-rw-r--r-- | scripts/gdb/linux/tasks.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py index 13bb97c..63cd6c5 100644 --- a/scripts/gdb/linux/tasks.py +++ b/scripts/gdb/linux/tasks.py @@ -71,3 +71,38 @@ return that task_struct variable which PID matches.""" LxTaskByPidFunc() + + +thread_info_type = utils.CachedType("struct thread_info") + +ia64_task_size = None + + +def get_thread_info(task): + global thread_info_type + thread_info_ptr_type = thread_info_type.get_type().pointer() + if utils.is_target_arch("ia64"): + global ia64_task_size + if ia64_task_size is None: + ia64_task_size = gdb.parse_and_eval("sizeof(struct task_struct)") + thread_info_addr = task.address + ia64_task_size + thread_info = thread_info_addr.cast(thread_info_ptr_type) + else: + thread_info = task['stack'].cast(thread_info_ptr_type) + return thread_info.dereference() + + +class LxThreadInfoFunc (gdb.Function): + """Calculate Linux thread_info from task variable. + +$lx_thread_info(TASK): Given TASK, return the corresponding thread_info +variable.""" + + def __init__(self): + super(LxThreadInfoFunc, self).__init__("lx_thread_info") + + def invoke(self, task): + return get_thread_info(task) + + +LxThreadInfoFunc() |