af62c4ddd0
a probe name. When dtrace -G builds up a DOF section for the specified provider(s), the probe function names are truncated to fit in this limit. The DOF is later used to build the symbol table for the generated object file, so the table can end up with truncated references, causing link errors. Instead of potentially truncating symbol table entries, write the full function name to the DOF string table and allow the kernel to enforce the 128-byte function name limit when a process attempts to load its DOF. PR: 194757 Differential Revision: https://reviews.freebsd.org/D1175 Reviewed by: rpaulo MFC after: 2 weeks
119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _DT_PROVIDER_H
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#define _DT_PROVIDER_H
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <dt_impl.h>
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#include <dt_ident.h>
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#include <dt_list.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct dt_provider {
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dt_list_t pv_list; /* list forward/back pointers */
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struct dt_provider *pv_next; /* pointer to next provider in hash */
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dtrace_providerdesc_t pv_desc; /* provider name and attributes */
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dt_idhash_t *pv_probes; /* probe defs (if user-declared) */
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dt_node_t *pv_nodes; /* parse node allocation list */
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ulong_t *pv_xrefs; /* translator reference bitmap */
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ulong_t pv_xrmax; /* number of valid bits in pv_xrefs */
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ulong_t pv_gen; /* generation # that created me */
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dtrace_hdl_t *pv_hdl; /* pointer to containing dtrace_hdl */
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uint_t pv_flags; /* flags (see below) */
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} dt_provider_t;
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#define DT_PROVIDER_INTF 0x1 /* provider interface declaration */
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#define DT_PROVIDER_IMPL 0x2 /* provider implementation is loaded */
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typedef struct dt_probe_iter {
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dtrace_probedesc_t pit_desc; /* description storage */
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dtrace_hdl_t *pit_hdl; /* libdtrace handle */
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dt_provider_t *pit_pvp; /* current provider */
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const char *pit_pat; /* caller's name pattern (or NULL) */
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dtrace_probe_f *pit_func; /* caller's function */
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void *pit_arg; /* caller's argument */
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uint_t pit_matches; /* number of matches */
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} dt_probe_iter_t;
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typedef struct dt_probe_instance {
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char *pi_fname; /* function name */
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char *pi_rname; /* mangled relocation name */
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uint32_t *pi_offs; /* offsets into the function */
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uint32_t *pi_enoffs; /* is-enabled offsets */
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uint_t pi_noffs; /* number of offsets */
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uint_t pi_maxoffs; /* size of pi_offs allocation */
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uint_t pi_nenoffs; /* number of is-enabled offsets */
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uint_t pi_maxenoffs; /* size of pi_enoffs allocation */
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struct dt_probe_instance *pi_next; /* next instance in the list */
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} dt_probe_instance_t;
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typedef struct dt_probe {
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dt_provider_t *pr_pvp; /* pointer to containing provider */
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dt_ident_t *pr_ident; /* pointer to probe identifier */
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const char *pr_name; /* pointer to name component */
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dt_node_t *pr_nargs; /* native argument list */
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dt_node_t **pr_nargv; /* native argument vector */
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uint_t pr_nargc; /* native argument count */
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dt_node_t *pr_xargs; /* translated argument list */
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dt_node_t **pr_xargv; /* translated argument vector */
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uint_t pr_xargc; /* translated argument count */
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uint8_t *pr_mapping; /* translated argument mapping */
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dt_probe_instance_t *pr_inst; /* list of functions and offsets */
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dtrace_typeinfo_t *pr_argv; /* output argument types */
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int pr_argc; /* output argument count */
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} dt_probe_t;
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extern dt_provider_t *dt_provider_lookup(dtrace_hdl_t *, const char *);
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extern dt_provider_t *dt_provider_create(dtrace_hdl_t *, const char *);
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extern void dt_provider_destroy(dtrace_hdl_t *, dt_provider_t *);
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extern int dt_provider_xref(dtrace_hdl_t *, dt_provider_t *, id_t);
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extern dt_probe_t *dt_probe_create(dtrace_hdl_t *, dt_ident_t *, int,
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dt_node_t *, uint_t, dt_node_t *, uint_t);
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extern dt_probe_t *dt_probe_info(dtrace_hdl_t *,
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const dtrace_probedesc_t *, dtrace_probeinfo_t *);
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extern dt_probe_t *dt_probe_lookup(dt_provider_t *, const char *);
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extern void dt_probe_declare(dt_provider_t *, dt_probe_t *);
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extern void dt_probe_destroy(dt_probe_t *);
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extern int dt_probe_define(dt_provider_t *, dt_probe_t *,
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const char *, const char *, uint32_t, int);
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extern dt_node_t *dt_probe_tag(dt_probe_t *, uint_t, dt_node_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _DT_PROVIDER_H */
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