Commit-ID: ec2ad9ccf12dc965cad2d367a4063f68d6561a6b Gitweb: http://git.kernel.org/tip/ec2ad9ccf12dc965cad2d367a4063f68d6561a6b Author: Josh Poimboeuf <jpoim...@redhat.com> AuthorDate: Fri, 16 Sep 2016 14:18:15 -0500 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 20 Sep 2016 08:29:34 +0200
oprofile/x86: Convert x86_backtrace() to use the new unwinder Convert oprofile's x86_backtrace() to use the new unwinder. dump_trace() has been deprecated. Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Byungchul Park <byungchul.p...@lge.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Nilay Vaish <nilayva...@gmail.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Robert Richter <r...@kernel.org> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/412df8927705795e8ea60cffcf89a79e010713b1.1474045023.git.jpoim...@redhat.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/oprofile/backtrace.c | 39 +++++++++++++++++---------------------- 1 file changed, 17 insertions(+), 22 deletions(-) diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c index 7539148..a2488b6 100644 --- a/arch/x86/oprofile/backtrace.c +++ b/arch/x86/oprofile/backtrace.c @@ -16,27 +16,7 @@ #include <asm/ptrace.h> #include <asm/stacktrace.h> - -static int backtrace_stack(void *data, const char *name) -{ - /* Yes, we want all stacks */ - return 0; -} - -static int backtrace_address(void *data, unsigned long addr, int reliable) -{ - unsigned int *depth = data; - - if ((*depth)--) - oprofile_add_trace(addr); - return 0; -} - -static struct stacktrace_ops backtrace_ops = { - .stack = backtrace_stack, - .address = backtrace_address, - .walk_stack = print_context_stack, -}; +#include <asm/unwind.h> #ifdef CONFIG_COMPAT static struct stack_frame_ia32 * @@ -113,14 +93,29 @@ x86_backtrace(struct pt_regs * const regs, unsigned int depth) struct stack_frame *head = (struct stack_frame *)frame_pointer(regs); if (!user_mode(regs)) { + struct unwind_state state; + unsigned long addr; + if (!depth) return; oprofile_add_trace(regs->ip); + if (!--depth) return; - dump_trace(NULL, regs, NULL, 0, &backtrace_ops, &depth); + for (unwind_start(&state, current, regs, NULL); + !unwind_done(&state); unwind_next_frame(&state)) { + addr = unwind_get_return_address(&state); + if (!addr) + break; + + oprofile_add_trace(addr); + + if (!--depth) + break; + } + return; }
