linux/kernel/stacktrace.c at master · flexbed/linux · GitHub

History

79 lines (67 loc) · 1.79 KB

Raw

* kernel/stacktrace.c

* Stack trace management functions

#include <linux/sched.h>

#include <linux/kernel.h>

#include <linux/export.h>

#include <linux/kallsyms.h>

#include <linux/stacktrace.h>

void print_stack_trace(struct stack_trace *trace, int spaces)

{

int i;

if (WARN_ON(!trace->entries))

return;

for (i = 0; i < trace->nr_entries; i++)

printk("%*c%pS\n", 1 + spaces, ' ', (void *)trace->entries[i]);

}

EXPORT_SYMBOL_GPL(print_stack_trace);

int snprint_stack_trace(char *buf, size_t size,

struct stack_trace *trace, int spaces)

{

int i;

int generated;

int total = 0;

if (WARN_ON(!trace->entries))

return 0;

for (i = 0; i < trace->nr_entries; i++) {

generated = snprintf(buf, size, "%*c%pS\n", 1 + spaces, ' ',

(void *)trace->entries[i]);

total += generated;

/* Assume that generated isn't a negative number */

if (generated >= size) {

buf += size;

size = 0;

} else {

buf += generated;

size -= generated;

}

return total;

}

EXPORT_SYMBOL_GPL(snprint_stack_trace);

* Architectures that do not implement save_stack_trace_*()

* get these weak aliases and once-per-bootup warnings

* (whenever this facility is utilized - for example by procfs):

__weak void

save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)

{

WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");

}

__weak void

save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)

{

WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");

}

__weak int

save_stack_trace_tsk_reliable(struct task_struct *tsk,

struct stack_trace *trace)

{

WARN_ONCE(1, KERN_INFO "save_stack_tsk_reliable() not implemented yet.\n");

return -ENOSYS;

}

linux/kernel/stacktrace.c at master · flexbed/linux · GitHub

Expand file tree

Breadcrumbs

stacktrace.c

Latest commit

History

Breadcrumbs

stacktrace.c

File metadata and controls