Release 4.7 arch/x86/kernel/stacktrace.c
/*
* Stack trace management functions
*
* Copyright (C) 2006-2009 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
*/
#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <asm/stacktrace.h>
static int save_stack_stack(void *data, char *name)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ingo molnar | ingo molnar | 8 | 47.06% | 1 | 33.33% |
| andi kleen | andi kleen | 8 | 47.06% | 1 | 33.33% |
| steven rostedt | steven rostedt | 1 | 5.88% | 1 | 33.33% |
| Total | 17 | 100.00% | 3 | 100.00% |
static int
__save_stack_address(void *data, unsigned long addr, bool reliable, bool nosched)
{
struct stack_trace *trace = data;
#ifdef CONFIG_FRAME_POINTER
if (!reliable)
return 0;
#endif
if (nosched && in_sched_functions(addr))
return 0;
if (trace->skip > 0) {
trace->skip--;
return 0;
}
if (trace->nr_entries < trace->max_entries) {
trace->entries[trace->nr_entries++] = addr;
return 0;
} else {
return -1; /* no more room, stop walking the stack */
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 35 | 33.33% | 1 | 14.29% |
| alexei starovoitov | alexei starovoitov | 23 | 21.90% | 1 | 14.29% |
| ingo molnar | ingo molnar | 21 | 20.00% | 1 | 14.29% |
| oleg nesterov | oleg nesterov | 19 | 18.10% | 2 | 28.57% |
| vegard nossum | vegard nossum | 5 | 4.76% | 1 | 14.29% |
| arjan van de ven | arjan van de ven | 2 | 1.90% | 1 | 14.29% |
| Total | 105 | 100.00% | 7 | 100.00% |
static int save_stack_address(void *data, unsigned long addr, int reliable)
{
return __save_stack_address(data, addr, reliable, false);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| arjan van de ven | arjan van de ven | 14 | 48.28% | 2 | 50.00% |
| oleg nesterov | oleg nesterov | 14 | 48.28% | 1 | 25.00% |
| alexei starovoitov | alexei starovoitov | 1 | 3.45% | 1 | 25.00% |
| Total | 29 | 100.00% | 4 | 100.00% |
static int
save_stack_address_nosched(void *data, unsigned long addr, int reliable)
{
return __save_stack_address(data, addr, reliable, true);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| oleg nesterov | oleg nesterov | 21 | 72.41% | 1 | 25.00% |
| arjan van de ven | arjan van de ven | 6 | 20.69% | 1 | 25.00% |
| alexei starovoitov | alexei starovoitov | 1 | 3.45% | 1 | 25.00% |
| vegard nossum | vegard nossum | 1 | 3.45% | 1 | 25.00% |
| Total | 29 | 100.00% | 4 | 100.00% |
static const struct stacktrace_ops save_stack_ops = {
.stack = save_stack_stack,
.address = save_stack_address,
.walk_stack = print_context_stack,
};
static const struct stacktrace_ops save_stack_ops_nosched = {
.stack = save_stack_stack,
.address = save_stack_address_nosched,
.walk_stack = print_context_stack,
};
/*
* Save stack-backtrace addresses into a stack_trace buffer.
*/
void save_stack_trace(struct stack_trace *trace)
{
dump_trace(current, NULL, NULL, 0, &save_stack_ops, trace);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ingo molnar | ingo molnar | 30 | 62.50% | 1 | 20.00% |
| catalin marinas | catalin marinas | 10 | 20.83% | 1 | 20.00% |
| andi kleen | andi kleen | 5 | 10.42% | 1 | 20.00% |
| namhyung kim | namhyung kim | 2 | 4.17% | 1 | 20.00% |
| christoph hellwig | christoph hellwig | 1 | 2.08% | 1 | 20.00% |
| Total | 48 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(save_stack_trace);
void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
{
dump_trace(current, regs, NULL, 0, &save_stack_ops, trace);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vegard nossum | vegard nossum | 43 | 81.13% | 1 | 25.00% |
| masami hiramatsu | masami hiramatsu | 4 | 7.55% | 1 | 25.00% |
| soeren sandmann pedersen* | soeren sandmann pedersen* | 4 | 7.55% | 1 | 25.00% |
| namhyung kim | namhyung kim | 2 | 3.77% | 1 | 25.00% |
| Total | 53 | 100.00% | 4 | 100.00% |
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
dump_trace(tsk, NULL, NULL, 0, &save_stack_ops_nosched, trace);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| arjan van de ven | arjan van de ven | 51 | 96.23% | 1 | 50.00% |
| namhyung kim | namhyung kim | 2 | 3.77% | 1 | 50.00% |
| Total | 53 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
/* Userspace stacktrace - based on kernel/trace/trace_sysprof.c */
struct stack_frame_user {
const void __user *next_fp;
unsigned long ret_addr;
};
static int
copy_stack_frame(const void __user *fp, struct stack_frame_user *frame)
{
int ret;
if (!access_ok(VERIFY_READ, fp, sizeof(*frame)))
return 0;
ret = 1;
pagefault_disable();
if (__copy_from_user_inatomic(frame, fp, sizeof(*frame)))
ret = 0;
pagefault_enable();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| torok edwin | torok edwin | 70 | 98.59% | 1 | 50.00% |
| frederic weisbecker | frederic weisbecker | 1 | 1.41% | 1 | 50.00% |
| Total | 71 | 100.00% | 2 | 100.00% |
static inline void __save_stack_trace_user(struct stack_trace *trace)
{
const struct pt_regs *regs = task_pt_regs(current);
const void __user *fp = (const void __user *)regs->bp;
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = regs->ip;
while (trace->nr_entries < trace->max_entries) {
struct stack_frame_user frame;
frame.next_fp = NULL;
frame.ret_addr = 0;
if (!copy_stack_frame(fp, &frame))
break;
if ((unsigned long)fp < regs->sp)
break;
if (frame.ret_addr) {
trace->entries[trace->nr_entries++] =
frame.ret_addr;
}
if (fp == frame.next_fp)
break;
fp = frame.next_fp;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| torok edwin | torok edwin | 152 | 99.35% | 2 | 66.67% |
| frederic weisbecker | frederic weisbecker | 1 | 0.65% | 1 | 33.33% |
| Total | 153 | 100.00% | 3 | 100.00% |
void save_stack_trace_user(struct stack_trace *trace)
{
/*
* Trace user stack if we are not a kernel thread
*/
if (current->mm) {
__save_stack_trace_user(trace);
}
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| torok edwin | torok edwin | 46 | 100.00% | 2 | 100.00% |
| Total | 46 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| torok edwin | torok edwin | 286 | 41.27% | 2 | 8.33% |
| arjan van de ven | arjan van de ven | 91 | 13.13% | 3 | 12.50% |
| ingo molnar | ingo molnar | 78 | 11.26% | 3 | 12.50% |
| andi kleen | andi kleen | 70 | 10.10% | 2 | 8.33% |
| oleg nesterov | oleg nesterov | 54 | 7.79% | 2 | 8.33% |
| vegard nossum | vegard nossum | 49 | 7.07% | 2 | 8.33% |
| alexei starovoitov | alexei starovoitov | 25 | 3.61% | 1 | 4.17% |
| frederic weisbecker | frederic weisbecker | 13 | 1.88% | 2 | 8.33% |
| catalin marinas | catalin marinas | 10 | 1.44% | 1 | 4.17% |
| namhyung kim | namhyung kim | 6 | 0.87% | 1 | 4.17% |
| soeren sandmann pedersen* | soeren sandmann pedersen* | 4 | 0.58% | 1 | 4.17% |
| masami hiramatsu | masami hiramatsu | 4 | 0.58% | 1 | 4.17% |
| steven rostedt | steven rostedt | 1 | 0.14% | 1 | 4.17% |
| jan beulich | jan beulich | 1 | 0.14% | 1 | 4.17% |
| christoph hellwig | christoph hellwig | 1 | 0.14% | 1 | 4.17% |
| Total | 693 | 100.00% | 24 | 100.00% |
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