b17b01533b
We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/debug.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* Stack trace management functions
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*
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* Copyright IBM Corp. 2006
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/sched.h>
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#include <linux/sched/debug.h>
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#include <linux/stacktrace.h>
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#include <linux/kallsyms.h>
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#include <linux/export.h>
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static int __save_address(void *data, unsigned long address, int nosched)
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{
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struct stack_trace *trace = data;
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if (nosched && in_sched_functions(address))
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return 0;
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if (trace->skip > 0) {
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trace->skip--;
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return 0;
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}
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if (trace->nr_entries < trace->max_entries) {
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trace->entries[trace->nr_entries++] = address;
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return 0;
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}
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return 1;
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}
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static int save_address(void *data, unsigned long address, int reliable)
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{
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return __save_address(data, address, 0);
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}
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static int save_address_nosched(void *data, unsigned long address, int reliable)
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{
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return __save_address(data, address, 1);
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}
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void save_stack_trace(struct stack_trace *trace)
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{
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unsigned long sp;
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sp = current_stack_pointer();
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dump_trace(save_address, trace, NULL, sp);
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if (trace->nr_entries < trace->max_entries)
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trace->entries[trace->nr_entries++] = ULONG_MAX;
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}
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EXPORT_SYMBOL_GPL(save_stack_trace);
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void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
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{
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unsigned long sp;
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sp = tsk->thread.ksp;
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if (tsk == current)
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sp = current_stack_pointer();
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dump_trace(save_address_nosched, trace, tsk, sp);
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if (trace->nr_entries < trace->max_entries)
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trace->entries[trace->nr_entries++] = ULONG_MAX;
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}
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EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
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void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
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{
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unsigned long sp;
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sp = kernel_stack_pointer(regs);
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dump_trace(save_address, trace, NULL, sp);
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if (trace->nr_entries < trace->max_entries)
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trace->entries[trace->nr_entries++] = ULONG_MAX;
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}
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EXPORT_SYMBOL_GPL(save_stack_trace_regs);
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