41da933c87
modifications to libproc to support fetching the CTF info for a given file. With this change, dtrace(1) is able to resolve type info for function and USDT probe arguments, and function return values. In particular, the args[n] syntax should now work for referencing arguments of userland probes, provided that the requisite CTF info is available. The uctf tests pass if the test programs are compiled with CTF info. The current infrastructure around the DTrace test suite doesn't support this yet. Differential Revision: https://reviews.freebsd.org/D891 MFC after: 1 month Relnotes: yes Sponsored by: EMC / Isilon Storage Division
158 lines
5.2 KiB
C
158 lines
5.2 KiB
C
/*-
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* Copyright (c) 2010 The FreeBSD Foundation
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* Copyright (c) 2008 John Birrell (jb@freebsd.org)
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* All rights reserved.
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*
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* Portions of this software were developed by Rui Paulo under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LIBPROC_H_
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#define _LIBPROC_H_
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#include <gelf.h>
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#include <rtld_db.h>
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#include <limits.h>
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struct ctf_file;
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struct proc_handle;
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typedef void (*proc_child_func)(void *);
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/* Values returned by proc_state(). */
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#define PS_IDLE 1
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#define PS_STOP 2
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#define PS_RUN 3
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#define PS_UNDEAD 4
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#define PS_DEAD 5
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#define PS_LOST 6
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/* Reason values for proc_detach(). */
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#define PRELEASE_HANG 1
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#define PRELEASE_KILL 2
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typedef struct prmap {
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uintptr_t pr_vaddr; /* Virtual address. */
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size_t pr_size; /* Mapping size in bytes */
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size_t pr_offset; /* Mapping offset in object */
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char pr_mapname[PATH_MAX]; /* Mapping filename */
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uint8_t pr_mflags; /* Protection flags */
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#define MA_READ 0x01
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#define MA_WRITE 0x02
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#define MA_EXEC 0x04
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#define MA_COW 0x08
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#define MA_NEEDS_COPY 0x10
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#define MA_NOCOREDUMP 0x20
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} prmap_t;
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typedef struct prsyminfo {
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u_int prs_lmid; /* Map id. */
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u_int prs_id; /* Symbol id. */
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} prsyminfo_t;
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typedef int proc_map_f(void *, const prmap_t *, const char *);
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typedef int proc_sym_f(void *, const GElf_Sym *, const char *);
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/* Values for ELF sections */
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#define PR_SYMTAB 1
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#define PR_DYNSYM 2
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/* Values for the 'mask' parameter in the iteration functions */
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#define BIND_LOCAL 0x0001
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#define BIND_GLOBAL 0x0002
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#define BIND_WEAK 0x0004
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#define BIND_ANY (BIND_LOCAL|BIND_GLOBAL|BIND_WEAK)
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#define TYPE_NOTYPE 0x0100
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#define TYPE_OBJECT 0x0200
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#define TYPE_FUNC 0x0400
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#define TYPE_SECTION 0x0800
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#define TYPE_FILE 0x1000
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#define TYPE_ANY (TYPE_NOTYPE|TYPE_OBJECT|TYPE_FUNC|TYPE_SECTION|\
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TYPE_FILE)
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typedef enum {
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REG_PC,
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REG_SP,
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REG_RVAL1,
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REG_RVAL2
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} proc_reg_t;
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#define SIG2STR_MAX 8
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typedef struct lwpstatus {
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int pr_why;
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#define PR_REQUESTED 1
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#define PR_FAULTED 2
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#define PR_SYSENTRY 3
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#define PR_SYSEXIT 4
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#define PR_SIGNALLED 5
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int pr_what;
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#define FLTBPT -1
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} lwpstatus_t;
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/* Function prototype definitions. */
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__BEGIN_DECLS
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prmap_t *proc_addr2map(struct proc_handle *, uintptr_t);
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prmap_t *proc_name2map(struct proc_handle *, const char *);
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char *proc_objname(struct proc_handle *, uintptr_t, char *, size_t);
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prmap_t *proc_obj2map(struct proc_handle *, const char *);
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int proc_iter_objs(struct proc_handle *, proc_map_f *, void *);
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int proc_iter_symbyaddr(struct proc_handle *, const char *, int,
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int, proc_sym_f *, void *);
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int proc_addr2sym(struct proc_handle *, uintptr_t, char *, size_t, GElf_Sym *);
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int proc_attach(pid_t pid, int flags, struct proc_handle **pphdl);
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int proc_continue(struct proc_handle *);
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int proc_clearflags(struct proc_handle *, int);
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int proc_create(const char *, char * const *, proc_child_func *, void *,
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struct proc_handle **);
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int proc_detach(struct proc_handle *, int);
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int proc_getflags(struct proc_handle *);
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int proc_name2sym(struct proc_handle *, const char *, const char *,
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GElf_Sym *, prsyminfo_t *);
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struct ctf_file *proc_name2ctf(struct proc_handle *, const char *);
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int proc_setflags(struct proc_handle *, int);
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int proc_state(struct proc_handle *);
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pid_t proc_getpid(struct proc_handle *);
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int proc_wstatus(struct proc_handle *);
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int proc_getwstat(struct proc_handle *);
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char * proc_signame(int, char *, size_t);
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int proc_read(struct proc_handle *, void *, size_t, size_t);
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const lwpstatus_t *proc_getlwpstatus(struct proc_handle *);
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void proc_free(struct proc_handle *);
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rd_agent_t *proc_rdagent(struct proc_handle *);
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void proc_updatesyms(struct proc_handle *);
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int proc_bkptset(struct proc_handle *, uintptr_t, unsigned long *);
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int proc_bkptdel(struct proc_handle *, uintptr_t, unsigned long);
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void proc_bkptregadj(unsigned long *);
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int proc_bkptexec(struct proc_handle *, unsigned long);
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int proc_regget(struct proc_handle *, proc_reg_t, unsigned long *);
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int proc_regset(struct proc_handle *, proc_reg_t, unsigned long);
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__END_DECLS
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#endif /* !_LIBPROC_H_ */
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