[PATCH] x86: Compress stack unwinder output
The unwinder has some extra newlines, which eat up loads of screen space when it spews. (See https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=137900 for a nasty example). warning_symbol-> and warning-> already printk a newline, so don't add one in the strings passed to them. [AK: redone for new code] Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de>
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@ -202,22 +202,22 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
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if (unw_ret > 0) {
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if (call_trace == 1 && !arch_unw_user_mode(&info)) {
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ops->warning_symbol(data,
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"DWARF2 unwinder stuck at %s\n",
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"DWARF2 unwinder stuck at %s",
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UNW_PC(&info));
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if (UNW_SP(&info) >= PAGE_OFFSET) {
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MSG("Leftover inexact backtrace:\n");
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MSG("Leftover inexact backtrace:");
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stack = (void *)UNW_SP(&info);
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if (!stack)
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return;
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ebp = UNW_FP(&info);
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} else
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MSG("Full inexact backtrace again:\n");
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MSG("Full inexact backtrace again:");
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} else if (call_trace >= 1)
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return;
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else
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MSG("Full inexact backtrace again:\n");
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MSG("Full inexact backtrace again:");
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} else
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MSG("Inexact backtrace:\n");
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MSG("Inexact backtrace:");
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}
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if (!stack) {
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unsigned long dummy;
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@ -280,7 +280,7 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
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if (unw_ret > 0) {
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if (call_trace == 1 && !arch_unw_user_mode(&info)) {
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ops->warning_symbol(data,
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"DWARF2 unwinder stuck at %s\n",
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"DWARF2 unwinder stuck at %s",
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UNW_PC(&info));
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if ((long)UNW_SP(&info) < 0) {
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MSG("Leftover inexact backtrace:");
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@ -288,13 +288,13 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
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if (!stack)
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return;
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} else
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MSG("Full inexact backtrace again:\n");
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MSG("Full inexact backtrace again:");
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} else if (call_trace >= 1)
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return;
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else
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MSG("Full inexact backtrace again:\n");
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MSG("Full inexact backtrace again:");
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} else
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MSG("Inexact backtrace:\n");
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MSG("Inexact backtrace:");
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}
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if (!stack) {
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unsigned long dummy;
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