Lines Matching full:stack

3  * Stack depot - a stack trace storage that avoids duplication.
5  * Stack depot is intended to be used by subsystems that need to store and
6  * later retrieve many potentially duplicated stack traces without wasting
9  * For example, KASAN needs to save allocation and free stack traces for each
10  * object. Storing two stack traces per object requires a lot of memory (e.g.
12  * stack traces often repeat, using stack depot allows to save about 100x space.
14  * Stack traces are never removed from the stack depot.
30  * Number of bits in the handle that stack depot doesn't use. Users may store
36  * Using stack depot requires its initialization, which can be done in 3 ways:
39  *    scenarios where it's known at compile time that stack depot will be used.
40  *    Enabling this config makes the kernel initialize stack depot in mm_init().
52  * config is disabled. The save/fetch/print stack depot functions can only be
54  * initializes stack depot via one of the ways listed above.
72  * __stack_depot_save - Save a stack trace to stack depot
74  * @entries:		Pointer to the stack trace
75  * @nr_entries:		Number of frames in the stack
77  * @can_alloc:		Allocate stack pools (increased chance of failure if false)
79  * Saves a stack trace from @entries array of size @nr_entries. If @can_alloc is
80  * %true, stack depot can replenish the stack pools in case no space is left
82  * any allocations and fails if no space is left to store the stack trace.
84  * If the provided stack trace comes from the interrupt context, only the part
92  * Return: Handle of the stack struct stored in depot, 0 on failure
99  * stack_depot_save - Save a stack trace to stack depot
101  * @entries:		Pointer to the stack trace
102  * @nr_entries:		Number of frames in the stack
108  * Return: Handle of the stack trace stored in depot, 0 on failure
114  * stack_depot_fetch - Fetch a stack trace from stack depot
116  * @handle:	Stack depot handle returned from stack_depot_save()
117  * @entries:	Pointer to store the address of the stack trace
119  * Return: Number of frames for the fetched stack
125  * stack_depot_print - Print a stack trace from stack depot
127  * @stack:	Stack depot handle returned from stack_depot_save()
129 void stack_depot_print(depot_stack_handle_t stack);
132  * stack_depot_snprint - Print a stack trace from stack depot into a buffer
134  * @handle:	Stack depot handle returned from stack_depot_save()
145  * stack_depot_set_extra_bits - Set extra bits in a stack depot handle
147  * @handle:	Stack depot handle returned from stack_depot_save()
150  * Return: Stack depot handle with extra bits set
152  * Stack depot handles have a few unused bits, which can be used for storing
153  * user-specific information. These bits are transparent to the stack depot.
159  * stack_depot_get_extra_bits - Retrieve extra bits from a stack depot handle
161  * @handle:	Stack depot handle with extra bits saved
163  * Return: Extra bits retrieved from the stack depot handle