forked from luck/tmp_suning_uos_patched
ef4a356574
Add --max-probes option to change the maximum limit of findable probe points per event, since inlined function can be expanded into thousands of probe points. Default value is 128. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100421195640.24664.62984.stgit@localhost6.localdomain6> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
#ifndef _PROBE_FINDER_H
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#define _PROBE_FINDER_H
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#include <stdbool.h>
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#include "util.h"
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#include "probe-event.h"
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#define MAX_PATH_LEN 256
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#define MAX_PROBE_BUFFER 1024
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#define MAX_PROBES 128
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static inline int is_c_varname(const char *name)
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{
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/* TODO */
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return isalpha(name[0]) || name[0] == '_';
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}
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#ifdef DWARF_SUPPORT
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/* Find kprobe_trace_events specified by perf_probe_event from debuginfo */
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extern int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
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struct kprobe_trace_event **tevs,
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int max_tevs);
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/* Find a perf_probe_point from debuginfo */
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extern int find_perf_probe_point(int fd, unsigned long addr,
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struct perf_probe_point *ppt);
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extern int find_line_range(int fd, struct line_range *lr);
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#include <dwarf.h>
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#include <libdw.h>
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struct probe_finder {
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struct perf_probe_event *pev; /* Target probe event */
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struct kprobe_trace_event *tevs; /* Result trace events */
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int ntevs; /* Number of trace events */
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int max_tevs; /* Max number of trace events */
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/* For function searching */
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int lno; /* Line number */
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Dwarf_Addr addr; /* Address */
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const char *fname; /* Real file name */
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Dwarf_Die cu_die; /* Current CU */
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struct list_head lcache; /* Line cache for lazy match */
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/* For variable searching */
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Dwarf_CFI *cfi; /* Call Frame Information */
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Dwarf_Op *fb_ops; /* Frame base attribute */
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struct perf_probe_arg *pvar; /* Current target variable */
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struct kprobe_trace_arg *tvar; /* Current result variable */
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};
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struct line_finder {
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struct line_range *lr; /* Target line range */
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const char *fname; /* File name */
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int lno_s; /* Start line number */
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int lno_e; /* End line number */
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Dwarf_Die cu_die; /* Current CU */
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int found;
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};
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#endif /* DWARF_SUPPORT */
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#endif /*_PROBE_FINDER_H */
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