Release 4.7 arch/x86/oprofile/backtrace.c
/**
* @file backtrace.c
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon
* @author David Smith
*/
#include <linux/oprofile.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/compat.h>
#include <linux/uaccess.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>
static int backtrace_stack(void *data, char *name)
{
/* Yes, we want all stacks */
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan blunck | jan blunck | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
static int backtrace_address(void *data, unsigned long addr, int reliable)
{
unsigned int *depth = data;
if ((*depth)--)
oprofile_add_trace(addr);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan blunck | jan blunck | 33 | 82.50% | 1 | 33.33% |
| alexei starovoitov | alexei starovoitov | 4 | 10.00% | 1 | 33.33% |
| arjan van de ven | arjan van de ven | 3 | 7.50% | 1 | 33.33% |
| Total | 40 | 100.00% | 3 | 100.00% |
static struct stacktrace_ops backtrace_ops = {
.stack = backtrace_stack,
.address = backtrace_address,
.walk_stack = print_context_stack,
};
#ifdef CONFIG_COMPAT
static struct stack_frame_ia32 *
dump_user_backtrace_32(struct stack_frame_ia32 *head)
{
/* Also check accessibility of one struct frame_head beyond: */
struct stack_frame_ia32 bufhead[2];
struct stack_frame_ia32 *fp;
unsigned long bytes;
bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
if (bytes != 0)
return NULL;
fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame);
oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
if (head >= fp)
return NULL;
return fp;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiri olsa | jiri olsa | 80 | 86.02% | 1 | 33.33% |
| robert richter | robert richter | 12 | 12.90% | 1 | 33.33% |
| peter zijlstra | peter zijlstra | 1 | 1.08% | 1 | 33.33% |
| Total | 93 | 100.00% | 3 | 100.00% |
static inline int
x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
{
struct stack_frame_ia32 *head;
/* User process is IA32 */
if (!current || !test_thread_flag(TIF_IA32))
return 0;
head = (struct stack_frame_ia32 *) regs->bp;
while (depth-- && head)
head = dump_user_backtrace_32(head);
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiri olsa | jiri olsa | 64 | 98.46% | 1 | 50.00% |
| h. peter anvin | h. peter anvin | 1 | 1.54% | 1 | 50.00% |
| Total | 65 | 100.00% | 2 | 100.00% |
#else
static inline int
x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiri olsa | jiri olsa | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
#endif /* CONFIG_COMPAT */
static struct stack_frame *dump_user_backtrace(struct stack_frame *head)
{
/* Also check accessibility of one struct frame_head beyond: */
struct stack_frame bufhead[2];
unsigned long bytes;
bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
if (bytes != 0)
return NULL;
oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
if (head >= bufhead[0].next_frame)
return NULL;
return bufhead[0].next_frame;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hugh dickins | hugh dickins | 44 | 54.32% | 1 | 16.67% |
| greg banks | greg banks | 17 | 20.99% | 1 | 16.67% |
| robert richter | robert richter | 12 | 14.81% | 1 | 16.67% |
| jiri olsa | jiri olsa | 6 | 7.41% | 1 | 16.67% |
| gerald britton | gerald britton | 1 | 1.23% | 1 | 16.67% |
| peter zijlstra | peter zijlstra | 1 | 1.23% | 1 | 16.67% |
| Total | 81 | 100.00% | 6 | 100.00% |
void
x86_backtrace(struct pt_regs * const regs, unsigned int depth)
{
struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
if (!user_mode(regs)) {
unsigned long stack = kernel_stack_pointer(regs);
if (depth)
dump_trace(NULL, regs, (unsigned long *)stack, 0,
&backtrace_ops, &depth);
return;
}
if (x86_backtrace_32(regs, depth))
return;
while (depth-- && head)
head = dump_user_backtrace(head);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| greg banks | greg banks | 53 | 53.00% | 1 | 11.11% |
| jan blunck | jan blunck | 22 | 22.00% | 2 | 22.22% |
| jiri olsa | jiri olsa | 12 | 12.00% | 2 | 22.22% |
| masami hiramatsu | masami hiramatsu | 9 | 9.00% | 1 | 11.11% |
| namhyung kim | namhyung kim | 2 | 2.00% | 1 | 11.11% |
| andy lutomirski | andy lutomirski | 1 | 1.00% | 1 | 11.11% |
| gerald britton | gerald britton | 1 | 1.00% | 1 | 11.11% |
| Total | 100 | 100.00% | 9 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiri olsa | jiri olsa | 192 | 40.94% | 2 | 11.76% |
| jan blunck | jan blunck | 92 | 19.62% | 2 | 11.76% |
| greg banks | greg banks | 82 | 17.48% | 1 | 5.88% |
| hugh dickins | hugh dickins | 46 | 9.81% | 1 | 5.88% |
| robert richter | robert richter | 28 | 5.97% | 2 | 11.76% |
| masami hiramatsu | masami hiramatsu | 9 | 1.92% | 1 | 5.88% |
| frederic weisbecker | frederic weisbecker | 5 | 1.07% | 1 | 5.88% |
| alexei starovoitov | alexei starovoitov | 4 | 0.85% | 1 | 5.88% |
| arjan van de ven | arjan van de ven | 3 | 0.64% | 1 | 5.88% |
| gerald britton | gerald britton | 2 | 0.43% | 1 | 5.88% |
| namhyung kim | namhyung kim | 2 | 0.43% | 1 | 5.88% |
| peter zijlstra | peter zijlstra | 2 | 0.43% | 1 | 5.88% |
| h. peter anvin | h. peter anvin | 1 | 0.21% | 1 | 5.88% |
| andy lutomirski | andy lutomirski | 1 | 0.21% | 1 | 5.88% |
| Total | 469 | 100.00% | 17 | 100.00% |
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