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.Dd May 11, 2016 .Dt PADDR_TO_CTF 3PROC .Os .Sh NAME .Nm Paddr_to_ctf , .Nm Plmid_to_ctf , .Nm Pname_to_ctf .Nd lookup CTF data .Sh SYNOPSIS .Lb libproc n libproc.h .Ft "ctf_file_t *" .Fo Paddr_to_ctf .Fa "struct ps_prochandle *P" .Fa "uintptr_t addr" .Fc .Ft "ctf_file_t *" .Fo Plmid_to_ctf .Fa "struct ps_prochandle *P" .Fa "Lmid_t lmid" .Fa "const char *name" .Fc .Ft "ctf_file_t *" .Fo Pname_to_ctf .Fa "struct ps_prochandle *P" .Fa "const char *name" .Fc .Sh DESCRIPTION The .Fn Paddr_to_ctf , .Fn Plmid_to_ctf , and .Fn Pname_to_ctf functions lookup CTF (Compact C Type Format) data, for use with .Sy libctf , from the process represented by the handle .Fa P . In all cases, the CTF sections of both the running executable and its shared libraries are searched.

p The CTF container returned is valid as long as the process handle .Fa P is valid. That is, until a call to .Xr Prelease 3PROC is made. Further, consumers must not close the CTF container.

p The .Fn Paddr_to_ctf function attempts to find the CTF section, if any, that exists for the address .Fa addr . Note, not all addresses correspond to memory regions that have CTF data. For example, if a user creates a region of anonymous memory through the .Xr mmap 2 function, then it will not have any corresponding CTF information.

p The .Fn Pname_to_ctf function looks up the object named .Fa name and returns the corresponding CTF section, if any exists. Two special values may be used for name. The macro .Dv PR_OBJ_EXEC refers to the executable object itself and the macro .Dv PR_OBJ_LDSO refers to the object ld.so.1 .

p The .Fn Plmid_to_ctf function is similar to .Fn Pname_to_ctf . It allows the passing of a link-map identifier, .Fa lmid , which constricts the search of the object named with .Fa name to that link-map. The special value of .Dv PR_LMID_EVERY indicates that every link-map should be searched, which is equivalent in behavior to the .Fn Pname_to_ctf function. .Sh RETURN VALUES Upon successful completion, the .Fn Paddr_to_ctf , .Fn Plmid_to_ctf , and .Fn Pname_to_ctf functions return a pointer to the corresponding CTF container. Otherwise, if none exists then .Dv NULL is returned. .Sh INTERFACE STABILITY .Sy Uncommitted .Sh MT-LEVEL See .Sy LOCKING in .Xr libproc 3LIB . .Sh SEE ALSO .Xr libproc 3LIB , .Xr ctf 4