Release 4.14 arch/mips/kernel/stacktrace.c
/*
* Stack trace management functions
*
* Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
*/
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task_stack.h>
#include <linux/stacktrace.h>
#include <linux/export.h>
#include <asm/stacktrace.h>
/*
* Save stack-backtrace addresses into a stack_trace buffer:
*/
static void save_raw_context_stack(struct stack_trace *trace,
unsigned long reg29, int savesched)
{
unsigned long *sp = (unsigned long *)reg29;
unsigned long addr;
while (!kstack_end(sp)) {
addr = *sp++;
if (__kernel_text_address(addr) &&
(savesched || !in_sched_functions(addr))) {
if (trace->skip > 0)
trace->skip--;
else
trace->entries[trace->nr_entries++] = addr;
if (trace->nr_entries >= trace->max_entries)
break;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Atsushi Nemoto | 93 | 87.74% | 2 | 66.67% |
| Aaro Koskinen | 13 | 12.26% | 1 | 33.33% |
| Total | 106 | 100.00% | 3 | 100.00% |
static void save_context_stack(struct stack_trace *trace,
struct task_struct *tsk, struct pt_regs *regs, int savesched)
{
unsigned long sp = regs->regs[29];
#ifdef CONFIG_KALLSYMS
unsigned long ra = regs->regs[31];
unsigned long pc = regs->cp0_epc;
if (raw_show_trace || !__kernel_text_address(pc)) {
unsigned long stack_page =
(unsigned long)task_stack_page(tsk);
if (stack_page && sp >= stack_page &&
sp <= stack_page + THREAD_SIZE - 32)
save_raw_context_stack(trace, sp, savesched);
return;
}
do {
if (savesched || !in_sched_functions(pc)) {
if (trace->skip > 0)
trace->skip--;
else
trace->entries[trace->nr_entries++] = pc;
if (trace->nr_entries >= trace->max_entries)
break;
}
pc = unwind_stack(tsk, &sp, pc, &ra);
} while (pc);
#else
save_raw_context_stack(trace, sp, savesched);
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Atsushi Nemoto | 167 | 86.53% | 4 | 66.67% |
| Aaro Koskinen | 19 | 9.84% | 1 | 16.67% |
| Ken Chen | 7 | 3.63% | 1 | 16.67% |
| Total | 193 | 100.00% | 6 | 100.00% |
/*
* Save stack-backtrace addresses into a stack_trace buffer.
*/
void save_stack_trace(struct stack_trace *trace)
{
save_stack_trace_tsk(current, trace);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Atsushi Nemoto | 9 | 52.94% | 1 | 50.00% |
| Ken Chen | 8 | 47.06% | 1 | 50.00% |
| Total | 17 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(save_stack_trace);
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
struct pt_regs dummyregs;
struct pt_regs *regs = &dummyregs;
WARN_ON(trace->nr_entries || !trace->max_entries);
if (tsk != current) {
regs->regs[29] = tsk->thread.reg29;
regs->regs[31] = 0;
regs->cp0_epc = tsk->thread.reg31;
} else
prepare_frametrace(regs);
save_context_stack(trace, tsk, regs, tsk == current);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ken Chen | 57 | 58.16% | 1 | 33.33% |
| Atsushi Nemoto | 37 | 37.76% | 1 | 33.33% |
| Aaro Koskinen | 4 | 4.08% | 1 | 33.33% |
| Total | 98 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Atsushi Nemoto | 317 | 71.24% | 4 | 33.33% |
| Ken Chen | 78 | 17.53% | 1 | 8.33% |
| Aaro Koskinen | 36 | 8.09% | 1 | 8.33% |
| Ingo Molnar | 10 | 2.25% | 3 | 25.00% |
| Heiko Carstens | 2 | 0.45% | 1 | 8.33% |
| Ralf Bächle | 1 | 0.22% | 1 | 8.33% |
| Paul Gortmaker | 1 | 0.22% | 1 | 8.33% |
| Total | 445 | 100.00% | 12 | 100.00% |
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