/* * kernel/stacktrace.c * * Stack trace management functions * * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar */ #include #include #include #include #include void print_stack_trace(struct stack_trace *trace, int spaces) { int i; if (WARN_ON(!trace->entries)) return; for (i = 0; i < trace->nr_entries; i++) { printk("%*c", 1 + spaces, ' '); print_ip_sym(trace->entries[i]); } } EXPORT_SYMBOL_GPL(print_stack_trace); int snprint_stack_trace(char *buf, size_t size, struct stack_trace *trace, int spaces) { int i; unsigned long ip; int generated; int total = 0; if (WARN_ON(!trace->entries)) return 0; for (i = 0; i < trace->nr_entries; i++) { ip = trace->entries[i]; generated = snprintf(buf, size, "%*c[<%p>] %pS\n", 1 + spaces, ' ', (void *) ip, (void *) ip); total += generated; /* Assume that generated isn't a negative number */ if (generated >= size) { buf += size; size = 0; } else { buf += generated; size -= generated; } } return total; } EXPORT_SYMBOL_GPL(snprint_stack_trace); /* * Architectures that do not implement save_stack_trace_tsk or * save_stack_trace_regs get this weak alias and a once-per-bootup warning * (whenever this facility is utilized - for example by procfs): */ __weak void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) { WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n"); } __weak void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace) { WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n"); } FEST'>logtree commit diff

path: root/tools/perf/MANIFEST

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