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[PATCH] lockdep: beautify x86_64 stacktraces

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Beautify x86_64 stacktraces to be more readable.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-07-03 00:24:36 -07:00 committed by Linus Torvalds
parent e4d9191885
commit 3ac94932a2
4 changed files with 33 additions and 42 deletions
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2
arch/x86_64/kernel/process.c
View file

@ -296,7 +296,7 @@ void __show_regs(struct pt_regs * regs)
system_utsname.version);
printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
printk_address(regs->rip);
printk("\nRSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp,
printk("RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp,
regs->eflags);
printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
regs->rax, regs->rbx, regs->rcx);

70
arch/x86_64/kernel/traps.c
View file

@ -110,28 +110,31 @@ static int kstack_depth_to_print = 12;
static int call_trace = 1;
#ifdef CONFIG_KALLSYMS
#include <linux/kallsyms.h>
int printk_address(unsigned long address)
{
# include <linux/kallsyms.h>
void printk_address(unsigned long address)
{
unsigned long offset = 0, symsize;
const char *symname;
char *modname;
char *delim = ":";
char *delim = ":";
char namebuf[128];
symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
if (!symname)
return printk("[<%016lx>]", address);
if (!modname)
symname = kallsyms_lookup(address, &symsize, &offset,
&modname, namebuf);
if (!symname) {
printk(" [<%016lx>]\n", address);
return;
}
if (!modname)
modname = delim = "";
return printk("<%016lx>{%s%s%s%s%+ld}",
address, delim, modname, delim, symname, offset);
}
printk(" [<%016lx>] %s%s%s%s+0x%lx/0x%lx\n",
address, delim, modname, delim, symname, offset, symsize);
}
#else
int printk_address(unsigned long address)
{
return printk("[<%016lx>]", address);
}
void printk_address(unsigned long address)
{
printk(" [<%016lx>]\n", address);
}
#endif
static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
@ -193,20 +196,14 @@ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
static int show_trace_unwind(struct unwind_frame_info *info, void *context)
{
int i = 11, n = 0;
int n = 0;
while (unwind(info) == 0 && UNW_PC(info)) {
++n;
if (i > 50) {
printk("\n ");
i = 7;
} else
i += printk(" ");
i += printk_address(UNW_PC(info));
n++;
printk_address(UNW_PC(info));
if (arch_unw_user_mode(info))
break;
}
printk("\n");
return n;
}
@ -224,7 +221,7 @@ void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
int i = 11;
unsigned used = 0;
printk("\nCall Trace:");
printk("\nCall Trace:\n");
if (!tsk)
tsk = current;
@ -254,12 +251,6 @@ void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
do while (cond) { \
unsigned long addr = *stack++; \
if (kernel_text_address(addr)) { \
if (i > 50) { \
printk("\n "); \
i = 0; \
} \
else \
i += printk(" "); \
/* \
* If the address is either in the text segment of the \
* kernel, or in the region which contains vmalloc'ed \
@ -268,20 +259,20 @@ void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
* down the cause of the crash will be able to figure \
* out the call path that was taken. \
*/ \
i += printk_address(addr); \
printk_address(addr); \
} \
} while (0)
for(; ; ) {
for( ; ; ) {
const char *id;
unsigned long *estack_end;
estack_end = in_exception_stack(cpu, (unsigned long)stack,
&used, &id);
if (estack_end) {
i += printk(" <%s>", id);
printk(" <%s>", id);
HANDLE_STACK (stack < estack_end);
i += printk(" <EOE>");
printk(" <EOE>");
stack = (unsigned long *) estack_end[-2];
continue;
}
@ -291,11 +282,11 @@ void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
(IRQSTACKSIZE - 64) / sizeof(*irqstack);
if (stack >= irqstack && stack < irqstack_end) {
i += printk(" <IRQ>");
printk(" <IRQ>");
HANDLE_STACK (stack < irqstack_end);
stack = (unsigned long *) (irqstack_end[-1]);
irqstack_end = NULL;
i += printk(" <EOI>");
printk(" <EOI>");
continue;
}
}
@ -304,6 +295,7 @@ void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
#undef HANDLE_STACK
printk("\n");
}
@ -337,8 +329,8 @@ static void _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned
break;
}
if (i && ((i % 4) == 0))
printk("\n ");
printk("%016lx ", *stack++);
printk("\n");
printk(" %016lx", *stack++);
touch_nmi_watchdog();
}
show_trace(tsk, regs, rsp);

1
arch/x86_64/mm/fault.c
View file

@ -570,7 +570,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
printk(KERN_ALERT "Unable to handle kernel paging request");
printk(" at %016lx RIP: \n" KERN_ALERT,address);
printk_address(regs->rip);
printk("\n");
dump_pagetable(address);
tsk->thread.cr2 = address;
tsk->thread.trap_no = 14;

2
include/asm-x86_64/kdebug.h
View file

@ -49,7 +49,7 @@ static inline int notify_die(enum die_val val, const char *str,
return atomic_notifier_call_chain(&die_chain, val, &args);
}
extern int printk_address(unsigned long address);
extern void printk_address(unsigned long address);
extern void die(const char *,struct pt_regs *,long);
extern void __die(const char *,struct pt_regs *,long);
extern void show_registers(struct pt_regs *regs);