tools/perf/util/probe-finder.h

#ifndef _PROBE_FINDER_H
#define _PROBE_FINDER_H

#define _stringify(n)	#n
#define stringify(n)	_stringify(n)

#ifdef DEBUG
#define debug(fmt ...)	\
	fprintf(stderr, "DBG(" __FILE__ ":" stringify(__LINE__) "): " fmt)
#else
#define debug(fmt ...)	do {} while (0)
#endif

#define ERR_IF(cnd)	\
	do { if (cnd) {	\
		fprintf(stderr, "Error (" __FILE__ ":" stringify(__LINE__) \
			"): " stringify(cnd) "\n");			\
		exit(1);						\
	} } while (0)

#define MAX_PATH_LEN 256
#define MAX_PROBE_BUFFER 1024
#define MAX_PROBES 128

static inline int is_c_varname(const char *name)
{
	/* TODO */
	return isalpha(name[0]) || name[0] == '_';
}

struct probe_point {
	/* Inputs */
	char	*file;		/* File name */
	int	line;		/* Line number */

	char	*function;	/* Function name */
	int	offset;		/* Offset bytes */

	int	nr_args;	/* Number of arguments */
	char	**args;		/* Arguments */

	/* Output */
	int	found;		/* Number of found probe points */
	char	*probes[MAX_PROBES];	/* Output buffers (will be allocated)*/
};

extern int find_probepoint(int fd, struct probe_point *pp);

#include <libdwarf/dwarf.h>
#include <libdwarf/libdwarf.h>

struct probe_finder {
	struct probe_point	*pp;	/* Target probe point */

	/* For function searching */
	Dwarf_Addr	addr;		/* Address */
	Dwarf_Unsigned	fno;		/* File number */
	Dwarf_Off	inl_offs;	/* Inline offset */

	/* For variable searching */
	Dwarf_Addr	cu_base;	/* Current CU base address */
	Dwarf_Locdesc	fbloc;		/* Location of Current Frame Base */
	const char	*var;		/* Current variable name */
	char		*buf;		/* Current output buffer */
	int		len;		/* Length of output buffer */
};

#endif /*_PROBE_FINDER_H */