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Diffstat (limited to 'cddl/contrib/opensolaris/tools/ctf/cvt/merge.c')
| -rw-r--r-- | cddl/contrib/opensolaris/tools/ctf/cvt/merge.c | 1135 |
1 files changed, 1135 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/merge.c b/cddl/contrib/opensolaris/tools/ctf/cvt/merge.c new file mode 100644 index 0000000..d366f31 --- /dev/null +++ b/cddl/contrib/opensolaris/tools/ctf/cvt/merge.c @@ -0,0 +1,1135 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2006 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* + * This file contains routines that merge one tdata_t tree, called the child, + * into another, called the parent. Note that these names are used mainly for + * convenience and to represent the direction of the merge. They are not meant + * to imply any relationship between the tdata_t graphs prior to the merge. + * + * tdata_t structures contain two main elements - a hash of iidesc_t nodes, and + * a directed graph of tdesc_t nodes, pointed to by the iidesc_t nodes. Simply + * put, we merge the tdesc_t graphs, followed by the iidesc_t nodes, and then we + * clean up loose ends. + * + * The algorithm is as follows: + * + * 1. Mapping iidesc_t nodes + * + * For each child iidesc_t node, we first try to map its tdesc_t subgraph + * against the tdesc_t graph in the parent. For each node in the child subgraph + * that exists in the parent, a mapping between the two (between their type IDs) + * is established. For the child nodes that cannot be mapped onto existing + * parent nodes, a mapping is established between the child node ID and a + * newly-allocated ID that the node will use when it is re-created in the + * parent. These unmappable nodes are added to the md_tdtba (tdesc_t To Be + * Added) hash, which tracks nodes that need to be created in the parent. + * + * If all of the nodes in the subgraph for an iidesc_t in the child can be + * mapped to existing nodes in the parent, then we can try to map the child + * iidesc_t onto an iidesc_t in the parent. If we cannot find an equivalent + * iidesc_t, or if we were not able to completely map the tdesc_t subgraph(s), + * then we add this iidesc_t to the md_iitba (iidesc_t To Be Added) list. This + * list tracks iidesc_t nodes that are to be created in the parent. + * + * While visiting the tdesc_t nodes, we may discover a forward declaration (a + * FORWARD tdesc_t) in the parent that is resolved in the child. That is, there + * may be a structure or union definition in the child with the same name as the + * forward declaration in the parent. If we find such a node, we record an + * association in the md_fdida (Forward => Definition ID Association) list + * between the parent ID of the forward declaration and the ID that the + * definition will use when re-created in the parent. + * + * 2. Creating new tdesc_t nodes (the md_tdtba hash) + * + * We have now attempted to map all tdesc_t nodes from the child into the + * parent, and have, in md_tdtba, a hash of all tdesc_t nodes that need to be + * created (or, as we so wittily call it, conjured) in the parent. We iterate + * through this hash, creating the indicated tdesc_t nodes. For a given tdesc_t + * node, conjuring requires two steps - the copying of the common tdesc_t data + * (name, type, etc) from the child node, and the creation of links from the + * newly-created node to the parent equivalents of other tdesc_t nodes pointed + * to by node being conjured. Note that in some cases, the targets of these + * links will be on the md_tdtba hash themselves, and may not have been created + * yet. As such, we can't establish the links from these new nodes into the + * parent graph. We therefore conjure them with links to nodes in the *child* + * graph, and add pointers to the links to be created to the md_tdtbr (tdesc_t + * To Be Remapped) hash. For example, a POINTER tdesc_t that could not be + * resolved would have its &tdesc_t->t_tdesc added to md_tdtbr. + * + * 3. Creating new iidesc_t nodes (the md_iitba list) + * + * When we have completed step 2, all tdesc_t nodes have been created (or + * already existed) in the parent. Some of them may have incorrect links (the + * members of the md_tdtbr list), but they've all been created. As such, we can + * create all of the iidesc_t nodes, as we can attach the tdesc_t subgraph + * pointers correctly. We create each node, and attach the pointers to the + * appropriate parts of the parent tdesc_t graph. + * + * 4. Resolving newly-created tdesc_t node links (the md_tdtbr list) + * + * As in step 3, we rely on the fact that all of the tdesc_t nodes have been + * created. Each entry in the md_tdtbr list is a pointer to where a link into + * the parent will be established. As saved in the md_tdtbr list, these + * pointers point into the child tdesc_t subgraph. We can thus get the target + * type ID from the child, look at the ID mapping to determine the desired link + * target, and redirect the link accordingly. + * + * 5. Parent => child forward declaration resolution + * + * If entries were made in the md_fdida list in step 1, we have forward + * declarations in the parent that need to be resolved to their definitions + * re-created in step 2 from the child. Using the md_fdida list, we can locate + * the definition for the forward declaration, and we can redirect all inbound + * edges to the forward declaration node to the actual definition. + * + * A pox on the house of anyone who changes the algorithm without updating + * this comment. + */ + +#include <stdio.h> +#include <strings.h> +#include <assert.h> +#include <pthread.h> + +#include "ctf_headers.h" +#include "ctftools.h" +#include "list.h" +#include "alist.h" +#include "memory.h" +#include "traverse.h" + +typedef struct equiv_data equiv_data_t; +typedef struct merge_cb_data merge_cb_data_t; + +/* + * There are two traversals in this file, for equivalency and for tdesc_t + * re-creation, that do not fit into the tdtraverse() framework. We have our + * own traversal mechanism and ops vector here for those two cases. + */ +typedef struct tdesc_ops { + const char *name; + int (*equiv)(tdesc_t *, tdesc_t *, equiv_data_t *); + tdesc_t *(*conjure)(tdesc_t *, int, merge_cb_data_t *); +} tdesc_ops_t; +extern tdesc_ops_t tdesc_ops[]; + +/* + * The workhorse structure of tdata_t merging. Holds all lists of nodes to be + * processed during various phases of the merge algorithm. + */ +struct merge_cb_data { + tdata_t *md_parent; + tdata_t *md_tgt; + alist_t *md_ta; /* Type Association */ + alist_t *md_fdida; /* Forward -> Definition ID Association */ + list_t **md_iitba; /* iidesc_t nodes To Be Added to the parent */ + hash_t *md_tdtba; /* tdesc_t nodes To Be Added to the parent */ + list_t **md_tdtbr; /* tdesc_t nodes To Be Remapped */ + int md_flags; +}; /* merge_cb_data_t */ + +/* + * When we first create a tdata_t from stabs data, we will have duplicate nodes. + * Normal merges, however, assume that the child tdata_t is already self-unique, + * and for speed reasons do not attempt to self-uniquify. If this flag is set, + * the merge algorithm will self-uniquify by avoiding the insertion of + * duplicates in the md_tdtdba list. + */ +#define MCD_F_SELFUNIQUIFY 0x1 + +/* + * When we merge the CTF data for the modules, we don't want it to contain any + * data that can be found in the reference module (usually genunix). If this + * flag is set, we're doing a merge between the fully merged tdata_t for this + * module and the tdata_t for the reference module, with the data unique to this + * module ending up in a third tdata_t. It is this third tdata_t that will end + * up in the .SUNW_ctf section for the module. + */ +#define MCD_F_REFMERGE 0x2 + +/* + * Mapping of child type IDs to parent type IDs + */ + +static void +add_mapping(alist_t *ta, tid_t srcid, tid_t tgtid) +{ + debug(3, "Adding mapping %u <%x> => %u <%x>\n", srcid, srcid, tgtid, tgtid); + + assert(!alist_find(ta, (void *)(uintptr_t)srcid, NULL)); + assert(srcid != 0 && tgtid != 0); + + alist_add(ta, (void *)(uintptr_t)srcid, (void *)(uintptr_t)tgtid); +} + +static tid_t +get_mapping(alist_t *ta, int srcid) +{ + void *ltgtid; + + if (alist_find(ta, (void *)(uintptr_t)srcid, (void **)<gtid)) + return ((uintptr_t)ltgtid); + else + return (0); +} + +/* + * Determining equivalence of tdesc_t subgraphs + */ + +struct equiv_data { + alist_t *ed_ta; + tdesc_t *ed_node; + tdesc_t *ed_tgt; + + int ed_clear_mark; + int ed_cur_mark; + int ed_selfuniquify; +}; /* equiv_data_t */ + +static int equiv_node(tdesc_t *, tdesc_t *, equiv_data_t *); + +/*ARGSUSED2*/ +static int +equiv_intrinsic(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed __unused) +{ + intr_t *si = stdp->t_intr; + intr_t *ti = ttdp->t_intr; + + if (si->intr_type != ti->intr_type || + si->intr_signed != ti->intr_signed || + si->intr_offset != ti->intr_offset || + si->intr_nbits != ti->intr_nbits) + return (0); + + if (si->intr_type == INTR_INT && + si->intr_iformat != ti->intr_iformat) + return (0); + else if (si->intr_type == INTR_REAL && + si->intr_fformat != ti->intr_fformat) + return (0); + + return (1); +} + +static int +equiv_plain(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed) +{ + return (equiv_node(stdp->t_tdesc, ttdp->t_tdesc, ed)); +} + +static int +equiv_function(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed) +{ + fndef_t *fn1 = stdp->t_fndef, *fn2 = ttdp->t_fndef; + int i; + + if (fn1->fn_nargs != fn2->fn_nargs || + fn1->fn_vargs != fn2->fn_vargs) + return (0); + + if (!equiv_node(fn1->fn_ret, fn2->fn_ret, ed)) + return (0); + + for (i = 0; i < (int) fn1->fn_nargs; i++) { + if (!equiv_node(fn1->fn_args[i], fn2->fn_args[i], ed)) + return (0); + } + + return (1); +} + +static int +equiv_array(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed) +{ + ardef_t *ar1 = stdp->t_ardef, *ar2 = ttdp->t_ardef; + + if (!equiv_node(ar1->ad_contents, ar2->ad_contents, ed) || + !equiv_node(ar1->ad_idxtype, ar2->ad_idxtype, ed)) + return (0); + + if (ar1->ad_nelems != ar2->ad_nelems) + return (0); + + return (1); +} + +static int +equiv_su(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed) +{ + mlist_t *ml1 = stdp->t_members, *ml2 = ttdp->t_members; + mlist_t *olm1 = NULL; + + while (ml1 && ml2) { + if (ml1->ml_offset != ml2->ml_offset || + strcmp(ml1->ml_name, ml2->ml_name) != 0 || + ml1->ml_size != ml2->ml_size || + !equiv_node(ml1->ml_type, ml2->ml_type, ed)) + return (0); + + olm1 = ml1; + ml1 = ml1->ml_next; + ml2 = ml2->ml_next; + } + + if (ml1 || ml2) + return (0); + + return (1); +} + +/*ARGSUSED2*/ +static int +equiv_enum(tdesc_t *stdp, tdesc_t *ttdp, equiv_data_t *ed __unused) +{ + elist_t *el1 = stdp->t_emem; + elist_t *el2 = ttdp->t_emem; + + while (el1 && el2) { + if (el1->el_number != el2->el_number || + strcmp(el1->el_name, el2->el_name) != 0) + return (0); + + el1 = el1->el_next; + el2 = el2->el_next; + } + + if (el1 || el2) + return (0); + + return (1); +} + +/*ARGSUSED*/ +static int +equiv_assert(tdesc_t *stdp __unused, tdesc_t *ttdp __unused, equiv_data_t *ed __unused) +{ + /* foul, evil, and very bad - this is a "shouldn't happen" */ + assert(1 == 0); + + return (0); +} + +static int +fwd_equiv(tdesc_t *ctdp, tdesc_t *mtdp) +{ + tdesc_t *defn = (ctdp->t_type == FORWARD ? mtdp : ctdp); + + return (defn->t_type == STRUCT || defn->t_type == UNION); +} + +static int +equiv_node(tdesc_t *ctdp, tdesc_t *mtdp, equiv_data_t *ed) +{ + int (*equiv)(tdesc_t *, tdesc_t *, equiv_data_t *); + int mapping; + + if (ctdp->t_emark > ed->ed_clear_mark && + mtdp->t_emark > ed->ed_clear_mark) + return (ctdp->t_emark == mtdp->t_emark); + + /* + * In normal (non-self-uniquify) mode, we don't want to do equivalency + * checking on a subgraph that has already been checked. If a mapping + * has already been established for a given child node, we can simply + * compare the mapping for the child node with the ID of the parent + * node. If we are in self-uniquify mode, then we're comparing two + * subgraphs within the child graph, and thus need to ignore any + * type mappings that have been created, as they are only valid into the + * parent. + */ + if ((mapping = get_mapping(ed->ed_ta, ctdp->t_id)) > 0 && + mapping == mtdp->t_id && !ed->ed_selfuniquify) + return (1); + + if (!streq(ctdp->t_name, mtdp->t_name)) + return (0); + + if (ctdp->t_type != mtdp->t_type) { + if (ctdp->t_type == FORWARD || mtdp->t_type == FORWARD) + return (fwd_equiv(ctdp, mtdp)); + else + return (0); + } + + ctdp->t_emark = ed->ed_cur_mark; + mtdp->t_emark = ed->ed_cur_mark; + ed->ed_cur_mark++; + + if ((equiv = tdesc_ops[ctdp->t_type].equiv) != NULL) + return (equiv(ctdp, mtdp, ed)); + + return (1); +} + +/* + * We perform an equivalency check on two subgraphs by traversing through them + * in lockstep. If a given node is equivalent in both the parent and the child, + * we mark it in both subgraphs, using the t_emark field, with a monotonically + * increasing number. If, in the course of the traversal, we reach a node that + * we have visited and numbered during this equivalency check, we have a cycle. + * If the previously-visited nodes don't have the same emark, then the edges + * that brought us to these nodes are not equivalent, and so the check ends. + * If the emarks are the same, the edges are equivalent. We then backtrack and + * continue the traversal. If we have exhausted all edges in the subgraph, and + * have not found any inequivalent nodes, then the subgraphs are equivalent. + */ +static int +equiv_cb(void *bucket, void *arg) +{ + equiv_data_t *ed = arg; + tdesc_t *mtdp = bucket; + tdesc_t *ctdp = ed->ed_node; + + ed->ed_clear_mark = ed->ed_cur_mark + 1; + ed->ed_cur_mark = ed->ed_clear_mark + 1; + + if (equiv_node(ctdp, mtdp, ed)) { + debug(3, "equiv_node matched %d <%x> %d <%x>\n", + ctdp->t_id, ctdp->t_id, mtdp->t_id, mtdp->t_id); + ed->ed_tgt = mtdp; + /* matched. stop looking */ + return (-1); + } + + return (0); +} + +/*ARGSUSED1*/ +static int +map_td_tree_pre(tdesc_t *ctdp, tdesc_t **ctdpp __unused, void *private) +{ + merge_cb_data_t *mcd = private; + + if (get_mapping(mcd->md_ta, ctdp->t_id) > 0) + return (0); + + return (1); +} + +/*ARGSUSED1*/ +static int +map_td_tree_post(tdesc_t *ctdp, tdesc_t **ctdpp __unused, void *private) +{ + merge_cb_data_t *mcd = private; + equiv_data_t ed; + + ed.ed_ta = mcd->md_ta; + ed.ed_clear_mark = mcd->md_parent->td_curemark; + ed.ed_cur_mark = mcd->md_parent->td_curemark + 1; + ed.ed_node = ctdp; + ed.ed_selfuniquify = 0; + + debug(3, "map_td_tree_post on %d <%x> %s\n", ctdp->t_id, ctdp->t_id,tdesc_name(ctdp)); + + if (hash_find_iter(mcd->md_parent->td_layouthash, ctdp, + equiv_cb, &ed) < 0) { + /* We found an equivalent node */ + if (ed.ed_tgt->t_type == FORWARD && ctdp->t_type != FORWARD) { + int id = mcd->md_tgt->td_nextid++; + + debug(3, "Creating new defn type %d <%x>\n", id, id); + add_mapping(mcd->md_ta, ctdp->t_id, id); + alist_add(mcd->md_fdida, (void *)(ulong_t)ed.ed_tgt, + (void *)(ulong_t)id); + hash_add(mcd->md_tdtba, ctdp); + } else + add_mapping(mcd->md_ta, ctdp->t_id, ed.ed_tgt->t_id); + + } else if (debug_level > 1 && hash_iter(mcd->md_parent->td_idhash, + equiv_cb, &ed) < 0) { + /* + * We didn't find an equivalent node by looking through the + * layout hash, but we somehow found it by performing an + * exhaustive search through the entire graph. This usually + * means that the "name" hash function is broken. + */ + aborterr("Second pass for %d (%s) == %d\n", ctdp->t_id, + tdesc_name(ctdp), ed.ed_tgt->t_id); + } else { + int id = mcd->md_tgt->td_nextid++; + + debug(3, "Creating new type %d <%x>\n", id, id); + add_mapping(mcd->md_ta, ctdp->t_id, id); + hash_add(mcd->md_tdtba, ctdp); + } + + mcd->md_parent->td_curemark = ed.ed_cur_mark + 1; + + return (1); +} + +/*ARGSUSED1*/ +static int +map_td_tree_self_post(tdesc_t *ctdp, tdesc_t **ctdpp __unused, void *private) +{ + merge_cb_data_t *mcd = private; + equiv_data_t ed; + + ed.ed_ta = mcd->md_ta; + ed.ed_clear_mark = mcd->md_parent->td_curemark; + ed.ed_cur_mark = mcd->md_parent->td_curemark + 1; + ed.ed_node = ctdp; + ed.ed_selfuniquify = 1; + ed.ed_tgt = NULL; + + if (hash_find_iter(mcd->md_tdtba, ctdp, equiv_cb, &ed) < 0) { + debug(3, "Self check found %d <%x> in %d <%x>\n", ctdp->t_id, + ctdp->t_id, ed.ed_tgt->t_id, ed.ed_tgt->t_id); + add_mapping(mcd->md_ta, ctdp->t_id, + get_mapping(mcd->md_ta, ed.ed_tgt->t_id)); + } else if (debug_level > 1 && hash_iter(mcd->md_tdtba, + equiv_cb, &ed) < 0) { + /* + * We didn't find an equivalent node using the quick way (going + * through the hash normally), but we did find it by iterating + * through the entire hash. This usually means that the hash + * function is broken. + */ + aborterr("Self-unique second pass for %d <%x> (%s) == %d <%x>\n", + ctdp->t_id, ctdp->t_id, tdesc_name(ctdp), ed.ed_tgt->t_id, + ed.ed_tgt->t_id); + } else { + int id = mcd->md_tgt->td_nextid++; + + debug(3, "Creating new type %d <%x>\n", id, id); + add_mapping(mcd->md_ta, ctdp->t_id, id); + hash_add(mcd->md_tdtba, ctdp); + } + + mcd->md_parent->td_curemark = ed.ed_cur_mark + 1; + + return (1); +} + +static tdtrav_cb_f map_pre[] = { + NULL, + map_td_tree_pre, /* intrinsic */ + map_td_tree_pre, /* pointer */ + map_td_tree_pre, /* array */ + map_td_tree_pre, /* function */ + map_td_tree_pre, /* struct */ + map_td_tree_pre, /* union */ + map_td_tree_pre, /* enum */ + map_td_tree_pre, /* forward */ + map_td_tree_pre, /* typedef */ + tdtrav_assert, /* typedef_unres */ + map_td_tree_pre, /* volatile */ + map_td_tree_pre, /* const */ + map_td_tree_pre /* restrict */ +}; + +static tdtrav_cb_f map_post[] = { + NULL, + map_td_tree_post, /* intrinsic */ + map_td_tree_post, /* pointer */ + map_td_tree_post, /* array */ + map_td_tree_post, /* function */ + map_td_tree_post, /* struct */ + map_td_tree_post, /* union */ + map_td_tree_post, /* enum */ + map_td_tree_post, /* forward */ + map_td_tree_post, /* typedef */ + tdtrav_assert, /* typedef_unres */ + map_td_tree_post, /* volatile */ + map_td_tree_post, /* const */ + map_td_tree_post /* restrict */ +}; + +static tdtrav_cb_f map_self_post[] = { + NULL, + map_td_tree_self_post, /* intrinsic */ + map_td_tree_self_post, /* pointer */ + map_td_tree_self_post, /* array */ + map_td_tree_self_post, /* function */ + map_td_tree_self_post, /* struct */ + map_td_tree_self_post, /* union */ + map_td_tree_self_post, /* enum */ + map_td_tree_self_post, /* forward */ + map_td_tree_self_post, /* typedef */ + tdtrav_assert, /* typedef_unres */ + map_td_tree_self_post, /* volatile */ + map_td_tree_self_post, /* const */ + map_td_tree_self_post /* restrict */ +}; + +/* + * Determining equivalence of iidesc_t nodes + */ + +typedef struct iifind_data { + iidesc_t *iif_template; + alist_t *iif_ta; + int iif_newidx; + int iif_refmerge; +} iifind_data_t; + +/* + * Check to see if this iidesc_t (node) - the current one on the list we're + * iterating through - matches the target one (iif->iif_template). Return -1 + * if it matches, to stop the iteration. + */ +static int +iidesc_match(void *data, void *arg) +{ + iidesc_t *node = data; + iifind_data_t *iif = arg; + int i; + + if (node->ii_type != iif->iif_template->ii_type || + !streq(node->ii_name, iif->iif_template->ii_name) || + node->ii_dtype->t_id != iif->iif_newidx) + return (0); + + if ((node->ii_type == II_SVAR || node->ii_type == II_SFUN) && + !streq(node->ii_owner, iif->iif_template->ii_owner)) + return (0); + + if (node->ii_nargs != iif->iif_template->ii_nargs) + return (0); + + for (i = 0; i < node->ii_nargs; i++) { + if (get_mapping(iif->iif_ta, + iif->iif_template->ii_args[i]->t_id) != + node->ii_args[i]->t_id) + return (0); + } + + if (iif->iif_refmerge) { + switch (iif->iif_template->ii_type) { + case II_GFUN: + case II_SFUN: + case II_GVAR: + case II_SVAR: + debug(3, "suppressing duping of %d %s from %s\n", + iif->iif_template->ii_type, + iif->iif_template->ii_name, + (iif->iif_template->ii_owner ? + iif->iif_template->ii_owner : "NULL")); + return (0); + case II_NOT: + case II_PSYM: + case II_SOU: + case II_TYPE: + break; + } + } + + return (-1); +} + +static int +merge_type_cb(void *data, void *arg) +{ + iidesc_t *sii = data; + merge_cb_data_t *mcd = arg; + iifind_data_t iif; + tdtrav_cb_f *post; + + post = (mcd->md_flags & MCD_F_SELFUNIQUIFY ? map_self_post : map_post); + + /* Map the tdesc nodes */ + (void) iitraverse(sii, &mcd->md_parent->td_curvgen, NULL, map_pre, post, + mcd); + + /* Map the iidesc nodes */ + iif.iif_template = sii; + iif.iif_ta = mcd->md_ta; + iif.iif_newidx = get_mapping(mcd->md_ta, sii->ii_dtype->t_id); + iif.iif_refmerge = (mcd->md_flags & MCD_F_REFMERGE); + + if (hash_match(mcd->md_parent->td_iihash, sii, iidesc_match, + &iif) == 1) + /* successfully mapped */ + return (1); + + debug(3, "tba %s (%d)\n", (sii->ii_name ? sii->ii_name : "(anon)"), + sii->ii_type); + + list_add(mcd->md_iitba, sii); + + return (0); +} + +static int +remap_node(tdesc_t **tgtp, tdesc_t *oldtgt, int selftid, tdesc_t *newself, + merge_cb_data_t *mcd) +{ + tdesc_t *tgt = NULL; + tdesc_t template; + int oldid = oldtgt->t_id; + + if (oldid == selftid) { + *tgtp = newself; + return (1); + } + + if ((template.t_id = get_mapping(mcd->md_ta, oldid)) == 0) + aborterr("failed to get mapping for tid %d <%x>\n", oldid, oldid); + + if (!hash_find(mcd->md_parent->td_idhash, (void *)&template, + (void *)&tgt) && (!(mcd->md_flags & MCD_F_REFMERGE) || + !hash_find(mcd->md_tgt->td_idhash, (void *)&template, + (void *)&tgt))) { + debug(3, "Remap couldn't find %d <%x> (from %d <%x>)\n", template.t_id, + template.t_id, oldid, oldid); + *tgtp = oldtgt; + list_add(mcd->md_tdtbr, tgtp); + return (0); + } + + *tgtp = tgt; + return (1); +} + +static tdesc_t * +conjure_template(tdesc_t *old, int newselfid) +{ + tdesc_t *new = xcalloc(sizeof (tdesc_t)); + + new->t_name = old->t_name ? xstrdup(old->t_name) : NULL; + new->t_type = old->t_type; + new->t_size = old->t_size; + new->t_id = newselfid; + new->t_flags = old->t_flags; + + return (new); +} + +/*ARGSUSED2*/ +static tdesc_t * +conjure_intrinsic(tdesc_t *old, int newselfid, merge_cb_data_t *mcd __unused) +{ + tdesc_t *new = conjure_template(old, newselfid); + + new->t_intr = xmalloc(sizeof (intr_t)); + bcopy(old->t_intr, new->t_intr, sizeof (intr_t)); + + return (new); +} + +static tdesc_t * +conjure_plain(tdesc_t *old, int newselfid, merge_cb_data_t *mcd) +{ + tdesc_t *new = conjure_template(old, newselfid); + + (void) remap_node(&new->t_tdesc, old->t_tdesc, old->t_id, new, mcd); + + return (new); +} + +static tdesc_t * +conjure_function(tdesc_t *old, int newselfid, merge_cb_data_t *mcd) +{ + tdesc_t *new = conjure_template(old, newselfid); + fndef_t *nfn = xmalloc(sizeof (fndef_t)); + fndef_t *ofn = old->t_fndef; + int i; + + (void) remap_node(&nfn->fn_ret, ofn->fn_ret, old->t_id, new, mcd); + + nfn->fn_nargs = ofn->fn_nargs; + nfn->fn_vargs = ofn->fn_vargs; + + if (nfn->fn_nargs > 0) + nfn->fn_args = xcalloc(sizeof (tdesc_t *) * ofn->fn_nargs); + + for (i = 0; i < (int) ofn->fn_nargs; i++) { + (void) remap_node(&nfn->fn_args[i], ofn->fn_args[i], old->t_id, + new, mcd); + } + + new->t_fndef = nfn; + + return (new); +} + +static tdesc_t * +conjure_array(tdesc_t *old, int newselfid, merge_cb_data_t *mcd) +{ + tdesc_t *new = conjure_template(old, newselfid); + ardef_t *nar = xmalloc(sizeof (ardef_t)); + ardef_t *oar = old->t_ardef; + + (void) remap_node(&nar->ad_contents, oar->ad_contents, old->t_id, new, + mcd); + (void) remap_node(&nar->ad_idxtype, oar->ad_idxtype, old->t_id, new, + mcd); + + nar->ad_nelems = oar->ad_nelems; + + new->t_ardef = nar; + + return (new); +} + +static tdesc_t * +conjure_su(tdesc_t *old, int newselfid, merge_cb_data_t *mcd) +{ + tdesc_t *new = conjure_template(old, newselfid); + mlist_t *omem, **nmemp; + + for (omem = old->t_members, nmemp = &new->t_members; + omem; omem = omem->ml_next, nmemp = &((*nmemp)->ml_next)) { + *nmemp = xmalloc(sizeof (mlist_t)); + (*nmemp)->ml_offset = omem->ml_offset; + (*nmemp)->ml_size = omem->ml_size; + (*nmemp)->ml_name = xstrdup(omem->ml_name ? omem->ml_name : "empty omem->ml_name"); + (void) remap_node(&((*nmemp)->ml_type), omem->ml_type, + old->t_id, new, mcd); + } + *nmemp = NULL; + + return (new); +} + +/*ARGSUSED2*/ +static tdesc_t * +conjure_enum(tdesc_t *old, int newselfid, merge_cb_data_t *mcd __unused) +{ + tdesc_t *new = conjure_template(old, newselfid); + elist_t *oel, **nelp; + + for (oel = old->t_emem, nelp = &new->t_emem; + oel; oel = oel->el_next, nelp = &((*nelp)->el_next)) { + *nelp = xmalloc(sizeof (elist_t)); + (*nelp)->el_name = xstrdup(oel->el_name); + (*nelp)->el_number = oel->el_number; + } + *nelp = NULL; + + return (new); +} + +/*ARGSUSED2*/ +static tdesc_t * +conjure_forward(tdesc_t *old, int newselfid, merge_cb_data_t *mcd) +{ + tdesc_t *new = conjure_template(old, newselfid); + + list_add(&mcd->md_tgt->td_fwdlist, new); + + return (new); +} + +/*ARGSUSED*/ +static tdesc_t * +conjure_assert(tdesc_t *old __unused, int newselfid __unused, merge_cb_data_t *mcd __unused) +{ + assert(1 == 0); + return (NULL); +} + +static iidesc_t * +conjure_iidesc(iidesc_t *old, merge_cb_data_t *mcd) +{ + iidesc_t *new = iidesc_dup(old); + int i; + + (void) remap_node(&new->ii_dtype, old->ii_dtype, -1, NULL, mcd); + for (i = 0; i < new->ii_nargs; i++) { + (void) remap_node(&new->ii_args[i], old->ii_args[i], -1, NULL, + mcd); + } + + return (new); +} + +static int +fwd_redir(tdesc_t *fwd, tdesc_t **fwdp, void *private) +{ + alist_t *map = private; + void *defn; + + if (!alist_find(map, (void *)fwd, (void **)&defn)) + return (0); + + debug(3, "Redirecting an edge to %s\n", tdesc_name(defn)); + + *fwdp = defn; + + return (1); +} + +static tdtrav_cb_f fwd_redir_cbs[] = { + NULL, + NULL, /* intrinsic */ + NULL, /* pointer */ + NULL, /* array */ + NULL, /* function */ + NULL, /* struct */ + NULL, /* union */ + NULL, /* enum */ + fwd_redir, /* forward */ + NULL, /* typedef */ + tdtrav_assert, /* typedef_unres */ + NULL, /* volatile */ + NULL, /* const */ + NULL /* restrict */ +}; + +typedef struct redir_mstr_data { + tdata_t *rmd_tgt; + alist_t *rmd_map; +} redir_mstr_data_t; + +static int +redir_mstr_fwd_cb(void *name, void *value, void *arg) +{ + tdesc_t *fwd = name; + int defnid = (uintptr_t)value; + redir_mstr_data_t *rmd = arg; + tdesc_t template; + tdesc_t *defn; + + template.t_id = defnid; + + if (!hash_find(rmd->rmd_tgt->td_idhash, (void *)&template, + (void *)&defn)) { + aborterr("Couldn't unforward %d (%s)\n", defnid, + tdesc_name(defn)); + } + + debug(3, "Forward map: resolved %d to %s\n", defnid, tdesc_name(defn)); + + alist_add(rmd->rmd_map, (void *)fwd, (void *)defn); + + return (1); +} + +static void +redir_mstr_fwds(merge_cb_data_t *mcd) +{ + redir_mstr_data_t rmd; + alist_t *map = alist_new(NULL, NULL); + + rmd.rmd_tgt = mcd->md_tgt; + rmd.rmd_map = map; + + if (alist_iter(mcd->md_fdida, redir_mstr_fwd_cb, &rmd)) { + (void) iitraverse_hash(mcd->md_tgt->td_iihash, + &mcd->md_tgt->td_curvgen, fwd_redir_cbs, NULL, NULL, map); + } + + alist_free(map); +} + +static int +add_iitba_cb(void *data, void *private) +{ + merge_cb_data_t *mcd = private; + iidesc_t *tba = data; + iidesc_t *new; + iifind_data_t iif; + int newidx; + + newidx = get_mapping(mcd->md_ta, tba->ii_dtype->t_id); + assert(newidx != -1); + + (void) list_remove(mcd->md_iitba, data, NULL, NULL); + + iif.iif_template = tba; + iif.iif_ta = mcd->md_ta; + iif.iif_newidx = newidx; + iif.iif_refmerge = (mcd->md_flags & MCD_F_REFMERGE); + + if (hash_match(mcd->md_parent->td_iihash, tba, iidesc_match, + &iif) == 1) { + debug(3, "iidesc_t %s already exists\n", + (tba->ii_name ? tba->ii_name : "(anon)")); + return (1); + } + + new = conjure_iidesc(tba, mcd); + hash_add(mcd->md_tgt->td_iihash, new); + + return (1); +} + +static int +add_tdesc(tdesc_t *oldtdp, int newid, merge_cb_data_t *mcd) +{ + tdesc_t *newtdp; + tdesc_t template; + + template.t_id = newid; + assert(hash_find(mcd->md_parent->td_idhash, + (void *)&template, NULL) == 0); + + debug(3, "trying to conjure %d %s (%d, <%x>) as %d, <%x>\n", + oldtdp->t_type, tdesc_name(oldtdp), oldtdp->t_id, + oldtdp->t_id, newid, newid); + + if ((newtdp = tdesc_ops[oldtdp->t_type].conjure(oldtdp, newid, + mcd)) == NULL) + /* couldn't map everything */ + return (0); + + debug(3, "succeeded\n"); + + hash_add(mcd->md_tgt->td_idhash, newtdp); + hash_add(mcd->md_tgt->td_layouthash, newtdp); + + return (1); +} + +static int +add_tdtba_cb(void *data, void *arg) +{ + tdesc_t *tdp = data; + merge_cb_data_t *mcd = arg; + int newid; + int rc; + + newid = get_mapping(mcd->md_ta, tdp->t_id); + assert(newid != -1); + + if ((rc = add_tdesc(tdp, newid, mcd))) + hash_remove(mcd->md_tdtba, (void *)tdp); + + return (rc); +} + +static int +add_tdtbr_cb(void *data, void *arg) +{ + tdesc_t **tdpp = data; + merge_cb_data_t *mcd = arg; + + debug(3, "Remapping %s (%d)\n", tdesc_name(*tdpp), (*tdpp)->t_id); + + if (!remap_node(tdpp, *tdpp, -1, NULL, mcd)) + return (0); + + (void) list_remove(mcd->md_tdtbr, (void *)tdpp, NULL, NULL); + return (1); +} + +static void +merge_types(hash_t *src, merge_cb_data_t *mcd) +{ + list_t *iitba = NULL; + list_t *tdtbr = NULL; + int iirc, tdrc; + + mcd->md_iitba = &iitba; + mcd->md_tdtba = hash_new(TDATA_LAYOUT_HASH_SIZE, tdesc_layouthash, + tdesc_layoutcmp); + mcd->md_tdtbr = &tdtbr; + + (void) hash_iter(src, merge_type_cb, mcd); + + tdrc = hash_iter(mcd->md_tdtba, add_tdtba_cb, mcd); + debug(3, "add_tdtba_cb added %d items\n", tdrc); + + iirc = list_iter(*mcd->md_iitba, add_iitba_cb, mcd); + debug(3, "add_iitba_cb added %d items\n", iirc); + + assert(list_count(*mcd->md_iitba) == 0 && + hash_count(mcd->md_tdtba) == 0); + + tdrc = list_iter(*mcd->md_tdtbr, add_tdtbr_cb, mcd); + debug(3, "add_tdtbr_cb added %d items\n", tdrc); + + if (list_count(*mcd->md_tdtbr) != 0) + aborterr("Couldn't remap all nodes\n"); + + /* + * We now have an alist of master forwards and the ids of the new master + * definitions for those forwards in mcd->md_fdida. By this point, + * we're guaranteed that all of the master definitions referenced in + * fdida have been added to the master tree. We now traverse through + * the master tree, redirecting all edges inbound to forwards that have + * definitions to those definitions. + */ + if (mcd->md_parent == mcd->md_tgt) { + redir_mstr_fwds(mcd); + } +} + +void +merge_into_master(tdata_t *cur, tdata_t *mstr, tdata_t *tgt, int selfuniquify) +{ + merge_cb_data_t mcd; + + cur->td_ref++; + mstr->td_ref++; + if (tgt) + tgt->td_ref++; + + assert(cur->td_ref == 1 && mstr->td_ref == 1 && + (tgt == NULL || tgt->td_ref == 1)); + + mcd.md_parent = mstr; + mcd.md_tgt = (tgt ? tgt : mstr); + mcd.md_ta = alist_new(NULL, NULL); + mcd.md_fdida = alist_new(NULL, NULL); + mcd.md_flags = 0; + + if (selfuniquify) + mcd.md_flags |= MCD_F_SELFUNIQUIFY; + if (tgt) + mcd.md_flags |= MCD_F_REFMERGE; + + mstr->td_curvgen = MAX(mstr->td_curvgen, cur->td_curvgen); + mstr->td_curemark = MAX(mstr->td_curemark, cur->td_curemark); + + merge_types(cur->td_iihash, &mcd); + + if (debug_level >= 3) { + debug(3, "Type association stats\n"); + alist_stats(mcd.md_ta, 0); + debug(3, "Layout hash stats\n"); + hash_stats(mcd.md_tgt->td_layouthash, 1); + } + + alist_free(mcd.md_fdida); + alist_free(mcd.md_ta); + + cur->td_ref--; + mstr->td_ref--; + if (tgt) + tgt->td_ref--; +} + +tdesc_ops_t tdesc_ops[] = { + { "ERROR! BAD tdesc TYPE", NULL, NULL }, + { "intrinsic", equiv_intrinsic, conjure_intrinsic }, + { "pointer", equiv_plain, conjure_plain }, + { "array", equiv_array, conjure_array }, + { "function", equiv_function, conjure_function }, + { "struct", equiv_su, conjure_su }, + { "union", equiv_su, conjure_su }, + { "enum", equiv_enum, conjure_enum }, + { "forward", NULL, conjure_forward }, + { "typedef", equiv_plain, conjure_plain }, + { "typedef_unres", equiv_assert, conjure_assert }, + { "volatile", equiv_plain, conjure_plain }, + { "const", equiv_plain, conjure_plain }, + { "restrict", equiv_plain, conjure_plain } +}; |
