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/* $NetBSD: make.c,v 1.79 2010/04/07 00:11:27 sjg Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: make.c,v 1.79 2010/04/07 00:11:27 sjg Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)make.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: make.c,v 1.79 2010/04/07 00:11:27 sjg Exp $");
#endif
#endif /* not lint */
#endif
/*-
* make.c --
* The functions which perform the examination of targets and
* their suitability for creation
*
* Interface:
* Make_Run Initialize things for the module and recreate
* whatever needs recreating. Returns TRUE if
* work was (or would have been) done and FALSE
* otherwise.
*
* Make_Update Update all parents of a given child. Performs
* various bookkeeping chores like the updating
* of the cmtime field of the parent, filling
* of the IMPSRC context variable, etc. It will
* place the parent on the toBeMade queue if it
* should be.
*
* Make_TimeStamp Function to set the parent's cmtime field
* based on a child's modification time.
*
* Make_DoAllVar Set up the various local variables for a
* target, including the .ALLSRC variable, making
* sure that any variable that needs to exist
* at the very least has the empty value.
*
* Make_OODate Determine if a target is out-of-date.
*
* Make_HandleUse See if a child is a .USE node for a parent
* and perform the .USE actions if so.
*
* Make_ExpandUse Expand .USE nodes
*/
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
static unsigned int checked = 1;/* Sequence # to detect recursion */
static Lst toBeMade; /* The current fringe of the graph. These
* are nodes which await examination by
* MakeOODate. It is added to by
* Make_Update and subtracted from by
* MakeStartJobs */
static int MakeAddChild(void *, void *);
static int MakeFindChild(void *, void *);
static int MakeUnmark(void *, void *);
static int MakeAddAllSrc(void *, void *);
static int MakeTimeStamp(void *, void *);
static int MakeHandleUse(void *, void *);
static Boolean MakeStartJobs(void);
static int MakePrintStatus(void *, void *);
static int MakeCheckOrder(void *, void *);
static int MakeBuildChild(void *, void *);
static int MakeBuildParent(void *, void *);
static void
make_abort(GNode *gn, int line)
{
static int two = 2;
fprintf(debug_file, "make_abort from line %d\n", line);
Targ_PrintNode(gn, &two);
Lst_ForEach(toBeMade, Targ_PrintNode, &two);
Targ_PrintGraph(3);
abort();
}
/*-
*-----------------------------------------------------------------------
* Make_TimeStamp --
* Set the cmtime field of a parent node based on the mtime stamp in its
* child. Called from MakeOODate via Lst_ForEach.
*
* Input:
* pgn the current parent
* cgn the child we've just examined
*
* Results:
* Always returns 0.
*
* Side Effects:
* The cmtime of the parent node will be changed if the mtime
* field of the child is greater than it.
*-----------------------------------------------------------------------
*/
int
Make_TimeStamp(GNode *pgn, GNode *cgn)
{
if (cgn->mtime > pgn->cmtime) {
pgn->cmtime = cgn->mtime;
}
return (0);
}
/*
* Input:
* pgn the current parent
* cgn the child we've just examined
*
*/
static int
MakeTimeStamp(void *pgn, void *cgn)
{
return Make_TimeStamp((GNode *)pgn, (GNode *)cgn);
}
/*-
*-----------------------------------------------------------------------
* Make_OODate --
* See if a given node is out of date with respect to its sources.
* Used by Make_Run when deciding which nodes to place on the
* toBeMade queue initially and by Make_Update to screen out USE and
* EXEC nodes. In the latter case, however, any other sort of node
* must be considered out-of-date since at least one of its children
* will have been recreated.
*
* Input:
* gn the node to check
*
* Results:
* TRUE if the node is out of date. FALSE otherwise.
*
* Side Effects:
* The mtime field of the node and the cmtime field of its parents
* will/may be changed.
*-----------------------------------------------------------------------
*/
Boolean
Make_OODate(GNode *gn)
{
Boolean oodate;
/*
* Certain types of targets needn't even be sought as their datedness
* doesn't depend on their modification time...
*/
if ((gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC)) == 0) {
(void)Dir_MTime(gn);
if (DEBUG(MAKE)) {
if (gn->mtime != 0) {
fprintf(debug_file, "modified %s...", Targ_FmtTime(gn->mtime));
} else {
fprintf(debug_file, "non-existent...");
}
}
}
/*
* A target is remade in one of the following circumstances:
* its modification time is smaller than that of its youngest child
* and it would actually be run (has commands or type OP_NOP)
* it's the object of a force operator
* it has no children, was on the lhs of an operator and doesn't exist
* already.
*
* Libraries are only considered out-of-date if the archive module says
* they are.
*
* These weird rules are brought to you by Backward-Compatibility and
* the strange people who wrote 'Make'.
*/
if (gn->type & (OP_USE|OP_USEBEFORE)) {
/*
* If the node is a USE node it is *never* out of date
* no matter *what*.
*/
if (DEBUG(MAKE)) {
fprintf(debug_file, ".USE node...");
}
oodate = FALSE;
} else if ((gn->type & OP_LIB) &&
((gn->mtime==0) || Arch_IsLib(gn))) {
if (DEBUG(MAKE)) {
fprintf(debug_file, "library...");
}
/*
* always out of date if no children and :: target
* or non-existent.
*/
oodate = (gn->mtime == 0 || Arch_LibOODate(gn) ||
(gn->cmtime == 0 && (gn->type & OP_DOUBLEDEP)));
} else if (gn->type & OP_JOIN) {
/*
* A target with the .JOIN attribute is only considered
* out-of-date if any of its children was out-of-date.
*/
if (DEBUG(MAKE)) {
fprintf(debug_file, ".JOIN node...");
}
if (DEBUG(MAKE)) {
fprintf(debug_file, "source %smade...", gn->flags & CHILDMADE ? "" : "not ");
}
oodate = (gn->flags & CHILDMADE) ? TRUE : FALSE;
} else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
/*
* A node which is the object of the force (!) operator or which has
* the .EXEC attribute is always considered out-of-date.
*/
if (DEBUG(MAKE)) {
if (gn->type & OP_FORCE) {
fprintf(debug_file, "! operator...");
} else if (gn->type & OP_PHONY) {
fprintf(debug_file, ".PHONY node...");
} else {
fprintf(debug_file, ".EXEC node...");
}
}
oodate = TRUE;
} else if (gn->mtime < gn->cmtime ||
(gn->cmtime == 0 &&
((gn->mtime == 0 && !(gn->type & OP_OPTIONAL))
|| gn->type & OP_DOUBLEDEP)))
{
/*
* A node whose modification time is less than that of its
* youngest child or that has no children (cmtime == 0) and
* either doesn't exist (mtime == 0) and it isn't optional
* or was the object of a * :: operator is out-of-date.
* Why? Because that's the way Make does it.
*/
if (DEBUG(MAKE)) {
if (gn->mtime < gn->cmtime) {
fprintf(debug_file, "modified before source...");
} else if (gn->mtime == 0) {
fprintf(debug_file, "non-existent and no sources...");
} else {
fprintf(debug_file, ":: operator and no sources...");
}
}
oodate = TRUE;
} else {
/*
* When a non-existing child with no sources
* (such as a typically used FORCE source) has been made and
* the target of the child (usually a directory) has the same
* timestamp as the timestamp just given to the non-existing child
* after it was considered made.
*/
if (DEBUG(MAKE)) {
if (gn->flags & FORCE)
fprintf(debug_file, "non existing child...");
}
oodate = (gn->flags & FORCE) ? TRUE : FALSE;
}
/*
* If the target isn't out-of-date, the parents need to know its
* modification time. Note that targets that appear to be out-of-date
* but aren't, because they have no commands and aren't of type OP_NOP,
* have their mtime stay below their children's mtime to keep parents from
* thinking they're out-of-date.
*/
if (!oodate) {
Lst_ForEach(gn->parents, MakeTimeStamp, gn);
}
return (oodate);
}
/*-
*-----------------------------------------------------------------------
* MakeAddChild --
* Function used by Make_Run to add a child to the list l.
* It will only add the child if its make field is FALSE.
*
* Input:
* gnp the node to add
* lp the list to which to add it
*
* Results:
* Always returns 0
*
* Side Effects:
* The given list is extended
*-----------------------------------------------------------------------
*/
static int
MakeAddChild(void *gnp, void *lp)
{
GNode *gn = (GNode *)gnp;
Lst l = (Lst) lp;
if ((gn->flags & REMAKE) == 0 && !(gn->type & (OP_USE|OP_USEBEFORE))) {
if (DEBUG(MAKE))
fprintf(debug_file, "MakeAddChild: need to examine %s%s\n",
gn->name, gn->cohort_num);
(void)Lst_EnQueue(l, gn);
}
return (0);
}
/*-
*-----------------------------------------------------------------------
* MakeFindChild --
* Function used by Make_Run to find the pathname of a child
* that was already made.
*
* Input:
* gnp the node to find
*
* Results:
* Always returns 0
*
* Side Effects:
* The path and mtime of the node and the cmtime of the parent are
* updated; the unmade children count of the parent is decremented.
*-----------------------------------------------------------------------
*/
static int
MakeFindChild(void *gnp, void *pgnp)
{
GNode *gn = (GNode *)gnp;
GNode *pgn = (GNode *)pgnp;
(void)Dir_MTime(gn);
Make_TimeStamp(pgn, gn);
pgn->unmade--;
return (0);
}
/*-
*-----------------------------------------------------------------------
* Make_HandleUse --
* Function called by Make_Run and SuffApplyTransform on the downward
* pass to handle .USE and transformation nodes. It implements the
* .USE and transformation functionality by copying the node's commands,
* type flags and children to the parent node.
*
* A .USE node is much like an explicit transformation rule, except
* its commands are always added to the target node, even if the
* target already has commands.
*
* Input:
* cgn The .USE node
* pgn The target of the .USE node
*
* Results:
* none
*
* Side Effects:
* Children and commands may be added to the parent and the parent's
* type may be changed.
*
*-----------------------------------------------------------------------
*/
void
Make_HandleUse(GNode *cgn, GNode *pgn)
{
LstNode ln; /* An element in the children list */
#ifdef DEBUG_SRC
if ((cgn->type & (OP_USE|OP_USEBEFORE|OP_TRANSFORM)) == 0) {
fprintf(debug_file, "Make_HandleUse: called for plain node %s\n", cgn->name);
return;
}
#endif
if ((cgn->type & (OP_USE|OP_USEBEFORE)) || Lst_IsEmpty(pgn->commands)) {
if (cgn->type & OP_USEBEFORE) {
/*
* .USEBEFORE --
* prepend the child's commands to the parent.
*/
Lst cmds = pgn->commands;
pgn->commands = Lst_Duplicate(cgn->commands, NULL);
(void)Lst_Concat(pgn->commands, cmds, LST_CONCNEW);
Lst_Destroy(cmds, NULL);
} else {
/*
* .USE or target has no commands --
* append the child's commands to the parent.
*/
(void)Lst_Concat(pgn->commands, cgn->commands, LST_CONCNEW);
}
}
if (Lst_Open(cgn->children) == SUCCESS) {
while ((ln = Lst_Next(cgn->children)) != NULL) {
GNode *tgn, *gn = (GNode *)Lst_Datum(ln);
/*
* Expand variables in the .USE node's name
* and save the unexpanded form.
* We don't need to do this for commands.
* They get expanded properly when we execute.
*/
if (gn->uname == NULL) {
gn->uname = gn->name;
} else {
if (gn->name)
free(gn->name);
}
gn->name = Var_Subst(NULL, gn->uname, pgn, FALSE);
if (gn->name && gn->uname && strcmp(gn->name, gn->uname) != 0) {
/* See if we have a target for this node. */
tgn = Targ_FindNode(gn->name, TARG_NOCREATE);
if (tgn != NULL)
gn = tgn;
}
(void)Lst_AtEnd(pgn->children, gn);
(void)Lst_AtEnd(gn->parents, pgn);
pgn->unmade += 1;
}
Lst_Close(cgn->children);
}
pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_USEBEFORE|OP_TRANSFORM);
}
/*-
*-----------------------------------------------------------------------
* MakeHandleUse --
* Callback function for Lst_ForEach, used by Make_Run on the downward
* pass to handle .USE nodes. Should be called before the children
* are enqueued to be looked at by MakeAddChild.
* This function calls Make_HandleUse to copy the .USE node's commands,
* type flags and children to the parent node.
*
* Input:
* cgnp the child we've just examined
* pgnp the current parent
*
* Results:
* returns 0.
*
* Side Effects:
* After expansion, .USE child nodes are removed from the parent
*
*-----------------------------------------------------------------------
*/
static int
MakeHandleUse(void *cgnp, void *pgnp)
{
GNode *cgn = (GNode *)cgnp;
GNode *pgn = (GNode *)pgnp;
LstNode ln; /* An element in the children list */
int unmarked;
unmarked = ((cgn->type & OP_MARK) == 0);
cgn->type |= OP_MARK;
if ((cgn->type & (OP_USE|OP_USEBEFORE)) == 0)
return (0);
if (unmarked)
Make_HandleUse(cgn, pgn);
/*
* This child node is now "made", so we decrement the count of
* unmade children in the parent... We also remove the child
* from the parent's list to accurately reflect the number of decent
* children the parent has. This is used by Make_Run to decide
* whether to queue the parent or examine its children...
*/
if ((ln = Lst_Member(pgn->children, cgn)) != NULL) {
Lst_Remove(pgn->children, ln);
pgn->unmade--;
}
return (0);
}
/*-
*-----------------------------------------------------------------------
* Make_Recheck --
* Check the modification time of a gnode, and update it as described
* in the comments below.
*
* Results:
* returns 0 if the gnode does not exist, or it's filesystem
* time if it does.
*
* Side Effects:
* the gnode's modification time and path name are affected.
*
*-----------------------------------------------------------------------
*/
time_t
Make_Recheck(GNode *gn)
{
time_t mtime = Dir_MTime(gn);
#ifndef RECHECK
/*
* We can't re-stat the thing, but we can at least take care of rules
* where a target depends on a source that actually creates the
* target, but only if it has changed, e.g.
*
* parse.h : parse.o
*
* parse.o : parse.y
* yacc -d parse.y
* cc -c y.tab.c
* mv y.tab.o parse.o
* cmp -s y.tab.h parse.h || mv y.tab.h parse.h
*
* In this case, if the definitions produced by yacc haven't changed
* from before, parse.h won't have been updated and gn->mtime will
* reflect the current modification time for parse.h. This is
* something of a kludge, I admit, but it's a useful one..
* XXX: People like to use a rule like
*
* FRC:
*
* To force things that depend on FRC to be made, so we have to
* check for gn->children being empty as well...
*/
if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) {
gn->mtime = now;
}
#else
/*
* This is what Make does and it's actually a good thing, as it
* allows rules like
*
* cmp -s y.tab.h parse.h || cp y.tab.h parse.h
*
* to function as intended. Unfortunately, thanks to the stateless
* nature of NFS (by which I mean the loose coupling of two clients
* using the same file from a common server), there are times
* when the modification time of a file created on a remote
* machine will not be modified before the local stat() implied by
* the Dir_MTime occurs, thus leading us to believe that the file
* is unchanged, wreaking havoc with files that depend on this one.
*
* I have decided it is better to make too much than to make too
* little, so this stuff is commented out unless you're sure it's ok.
* -- ardeb 1/12/88
*/
/*
* Christos, 4/9/92: If we are saving commands pretend that
* the target is made now. Otherwise archives with ... rules
* don't work!
*/
if (NoExecute(gn) || (gn->type & OP_SAVE_CMDS) ||
(mtime == 0 && !(gn->type & OP_WAIT))) {
if (DEBUG(MAKE)) {
fprintf(debug_file, " recheck(%s): update time from %s to now\n",
gn->name, Targ_FmtTime(gn->mtime));
}
gn->mtime = now;
}
else {
if (DEBUG(MAKE)) {
fprintf(debug_file, " recheck(%s): current update time: %s\n",
gn->name, Targ_FmtTime(gn->mtime));
}
}
#endif
return mtime;
}
/*-
*-----------------------------------------------------------------------
* Make_Update --
* Perform update on the parents of a node. Used by JobFinish once
* a node has been dealt with and by MakeStartJobs if it finds an
* up-to-date node.
*
* Input:
* cgn the child node
*
* Results:
* Always returns 0
*
* Side Effects:
* The unmade field of pgn is decremented and pgn may be placed on
* the toBeMade queue if this field becomes 0.
*
* If the child was made, the parent's flag CHILDMADE field will be
* set true and its cmtime set to now.
*
* If the child is not up-to-date and still does not exist,
* set the FORCE flag on the parents.
*
* If the child wasn't made, the cmtime field of the parent will be
* altered if the child's mtime is big enough.
*
* Finally, if the child is the implied source for the parent, the
* parent's IMPSRC variable is set appropriately.
*
*-----------------------------------------------------------------------
*/
void
Make_Update(GNode *cgn)
{
GNode *pgn; /* the parent node */
char *cname; /* the child's name */
LstNode ln; /* Element in parents and iParents lists */
time_t mtime = -1;
char *p1;
Lst parents;
GNode *centurion;
/* It is save to re-examine any nodes again */
checked++;
cname = Var_Value(TARGET, cgn, &p1);
if (p1)
free(p1);
if (DEBUG(MAKE))
fprintf(debug_file, "Make_Update: %s%s\n", cgn->name, cgn->cohort_num);
/*
* If the child was actually made, see what its modification time is
* now -- some rules won't actually update the file. If the file still
* doesn't exist, make its mtime now.
*/
if (cgn->made != UPTODATE) {
mtime = Make_Recheck(cgn);
}
/*
* If this is a `::' node, we must consult its first instance
* which is where all parents are linked.
*/
if ((centurion = cgn->centurion) != NULL) {
if (!Lst_IsEmpty(cgn->parents))
Punt("%s%s: cohort has parents", cgn->name, cgn->cohort_num);
centurion->unmade_cohorts -= 1;
if (centurion->unmade_cohorts < 0)
Error("Graph cycles through centurion %s", centurion->name);
} else {
centurion = cgn;
}
parents = centurion->parents;
/* If this was a .ORDER node, schedule the RHS */
Lst_ForEach(centurion->order_succ, MakeBuildParent, Lst_First(toBeMade));
/* Now mark all the parents as having one less unmade child */
if (Lst_Open(parents) == SUCCESS) {
while ((ln = Lst_Next(parents)) != NULL) {
pgn = (GNode *)Lst_Datum(ln);
if (DEBUG(MAKE))
fprintf(debug_file, "inspect parent %s%s: flags %x, "
"type %x, made %d, unmade %d ",
pgn->name, pgn->cohort_num, pgn->flags,
pgn->type, pgn->made, pgn->unmade-1);
if (!(pgn->flags & REMAKE)) {
/* This parent isn't needed */
if (DEBUG(MAKE))
fprintf(debug_file, "- not needed\n");
continue;
}
if (mtime == 0 && !(cgn->type & OP_WAIT))
pgn->flags |= FORCE;
/*
* If the parent has the .MADE attribute, its timestamp got
* updated to that of its newest child, and its unmake
* child count got set to zero in Make_ExpandUse().
* However other things might cause us to build one of its
* children - and so we mustn't do any processing here when
* the child build finishes.
*/
if (pgn->type & OP_MADE) {
if (DEBUG(MAKE))
fprintf(debug_file, "- .MADE\n");
continue;
}
if ( ! (cgn->type & (OP_EXEC|OP_USE|OP_USEBEFORE))) {
if (cgn->made == MADE)
pgn->flags |= CHILDMADE;
(void)Make_TimeStamp(pgn, cgn);
}
/*
* A parent must wait for the completion of all instances
* of a `::' dependency.
*/
if (centurion->unmade_cohorts != 0 || centurion->made < MADE) {
if (DEBUG(MAKE))
fprintf(debug_file,
"- centurion made %d, %d unmade cohorts\n",
centurion->made, centurion->unmade_cohorts);
continue;
}
/* One more child of this parent is now made */
pgn->unmade -= 1;
if (pgn->unmade < 0) {
if (DEBUG(MAKE)) {
fprintf(debug_file, "Graph cycles through %s%s\n",
pgn->name, pgn->cohort_num);
Targ_PrintGraph(2);
}
Error("Graph cycles through %s%s", pgn->name, pgn->cohort_num);
}
/* We must always rescan the parents of .WAIT and .ORDER nodes. */
if (pgn->unmade != 0 && !(centurion->type & OP_WAIT)
&& !(centurion->flags & DONE_ORDER)) {
if (DEBUG(MAKE))
fprintf(debug_file, "- unmade children\n");
continue;
}
if (pgn->made != DEFERRED) {
/*
* Either this parent is on a different branch of the tree,
* or it on the RHS of a .WAIT directive
* or it is already on the toBeMade list.
*/
if (DEBUG(MAKE))
fprintf(debug_file, "- not deferred\n");
continue;
}
if (pgn->order_pred
&& Lst_ForEach(pgn->order_pred, MakeCheckOrder, 0)) {
/* A .ORDER rule stops us building this */
continue;
}
if (DEBUG(MAKE)) {
static int two = 2;
fprintf(debug_file, "- %s%s made, schedule %s%s (made %d)\n",
cgn->name, cgn->cohort_num,
pgn->name, pgn->cohort_num, pgn->made);
Targ_PrintNode(pgn, &two);
}
/* Ok, we can schedule the parent again */
pgn->made = REQUESTED;
(void)Lst_EnQueue(toBeMade, pgn);
}
Lst_Close(parents);
}
/*
* Set the .PREFIX and .IMPSRC variables for all the implied parents
* of this node.
*/
if (Lst_Open(cgn->iParents) == SUCCESS) {
char *cpref = Var_Value(PREFIX, cgn, &p1);
while ((ln = Lst_Next(cgn->iParents)) != NULL) {
pgn = (GNode *)Lst_Datum(ln);
if (pgn->flags & REMAKE) {
Var_Set(IMPSRC, cname, pgn, 0);
if (cpref != NULL)
Var_Set(PREFIX, cpref, pgn, 0);
}
}
if (p1)
free(p1);
Lst_Close(cgn->iParents);
}
}
/*-
*-----------------------------------------------------------------------
* MakeAddAllSrc --
* Add a child's name to the ALLSRC and OODATE variables of the given
* node. Called from Make_DoAllVar via Lst_ForEach. A child is added only
* if it has not been given the .EXEC, .USE or .INVISIBLE attributes.
* .EXEC and .USE children are very rarely going to be files, so...
* If the child is a .JOIN node, its ALLSRC is propagated to the parent.
*
* A child is added to the OODATE variable if its modification time is
* later than that of its parent, as defined by Make, except if the
* parent is a .JOIN node. In that case, it is only added to the OODATE
* variable if it was actually made (since .JOIN nodes don't have
* modification times, the comparison is rather unfair...)..
*
* Results:
* Always returns 0
*
* Side Effects:
* The ALLSRC variable for the given node is extended.
*-----------------------------------------------------------------------
*/
static int
MakeUnmark(void *cgnp, void *pgnp __unused)
{
GNode *cgn = (GNode *)cgnp;
cgn->type &= ~OP_MARK;
return (0);
}
/*
* Input:
* cgnp The child to add
* pgnp The parent to whose ALLSRC variable it should
* be added
*
*/
static int
MakeAddAllSrc(void *cgnp, void *pgnp)
{
GNode *cgn = (GNode *)cgnp;
GNode *pgn = (GNode *)pgnp;
if (cgn->type & OP_MARK)
return (0);
cgn->type |= OP_MARK;
if ((cgn->type & (OP_EXEC|OP_USE|OP_USEBEFORE|OP_INVISIBLE)) == 0) {
char *child, *allsrc;
char *p1 = NULL, *p2 = NULL;
if (cgn->type & OP_ARCHV)
child = Var_Value(MEMBER, cgn, &p1);
else
child = cgn->path ? cgn->path : cgn->name;
if (cgn->type & OP_JOIN) {
allsrc = Var_Value(ALLSRC, cgn, &p2);
} else {
allsrc = child;
}
if (allsrc != NULL)
Var_Append(ALLSRC, allsrc, pgn);
if (p2)
free(p2);
if (pgn->type & OP_JOIN) {
if (cgn->made == MADE) {
Var_Append(OODATE, child, pgn);
}
} else if ((pgn->mtime < cgn->mtime) ||
(cgn->mtime >= now && cgn->made == MADE))
{
/*
* It goes in the OODATE variable if the parent is younger than the
* child or if the child has been modified more recently than
* the start of the make. This is to keep pmake from getting
* confused if something else updates the parent after the
* make starts (shouldn't happen, I know, but sometimes it
* does). In such a case, if we've updated the kid, the parent
* is likely to have a modification time later than that of
* the kid and anything that relies on the OODATE variable will
* be hosed.
*
* XXX: This will cause all made children to go in the OODATE
* variable, even if they're not touched, if RECHECK isn't defined,
* since cgn->mtime is set to now in Make_Update. According to
* some people, this is good...
*/
Var_Append(OODATE, child, pgn);
}
if (p1)
free(p1);
}
return (0);
}
/*-
*-----------------------------------------------------------------------
* Make_DoAllVar --
* Set up the ALLSRC and OODATE variables. Sad to say, it must be
* done separately, rather than while traversing the graph. This is
* because Make defined OODATE to contain all sources whose modification
* times were later than that of the target, *not* those sources that
* were out-of-date. Since in both compatibility and native modes,
* the modification time of the parent isn't found until the child
* has been dealt with, we have to wait until now to fill in the
* variable. As for ALLSRC, the ordering is important and not
* guaranteed when in native mode, so it must be set here, too.
*
* Results:
* None
*
* Side Effects:
* The ALLSRC and OODATE variables of the given node is filled in.
* If the node is a .JOIN node, its TARGET variable will be set to
* match its ALLSRC variable.
*-----------------------------------------------------------------------
*/
void
Make_DoAllVar(GNode *gn)
{
if (gn->flags & DONE_ALLSRC)
return;
Lst_ForEach(gn->children, MakeUnmark, gn);
Lst_ForEach(gn->children, MakeAddAllSrc, gn);
if (!Var_Exists (OODATE, gn)) {
Var_Set(OODATE, "", gn, 0);
}
if (!Var_Exists (ALLSRC, gn)) {
Var_Set(ALLSRC, "", gn, 0);
}
if (gn->type & OP_JOIN) {
char *p1;
Var_Set(TARGET, Var_Value(ALLSRC, gn, &p1), gn, 0);
if (p1)
free(p1);
}
gn->flags |= DONE_ALLSRC;
}
/*-
*-----------------------------------------------------------------------
* MakeStartJobs --
* Start as many jobs as possible.
*
* Results:
* If the query flag was given to pmake, no job will be started,
* but as soon as an out-of-date target is found, this function
* returns TRUE. At all other times, this function returns FALSE.
*
* Side Effects:
* Nodes are removed from the toBeMade queue and job table slots
* are filled.
*
*-----------------------------------------------------------------------
*/
static int
MakeCheckOrder(void *v_bn, void *ignore __unused)
{
GNode *bn = v_bn;
if (bn->made >= MADE || !(bn->flags & REMAKE))
return 0;
if (DEBUG(MAKE))
fprintf(debug_file, "MakeCheckOrder: Waiting for .ORDER node %s%s\n",
bn->name, bn->cohort_num);
return 1;
}
static int
MakeBuildChild(void *v_cn, void *toBeMade_next)
{
GNode *cn = v_cn;
if (DEBUG(MAKE))
fprintf(debug_file, "MakeBuildChild: inspect %s%s, made %d, type %x\n",
cn->name, cn->cohort_num, cn->made, cn->type);
if (cn->made > DEFERRED)
return 0;
/* If this node is on the RHS of a .ORDER, check LHSs. */
if (cn->order_pred && Lst_ForEach(cn->order_pred, MakeCheckOrder, 0)) {
/* Can't build this (or anything else in this child list) yet */
cn->made = DEFERRED;
return 1;
}
if (DEBUG(MAKE))
fprintf(debug_file, "MakeBuildChild: schedule %s%s\n",
cn->name, cn->cohort_num);
cn->made = REQUESTED;
if (toBeMade_next == NULL)
Lst_AtEnd(toBeMade, cn);
else
Lst_InsertBefore(toBeMade, toBeMade_next, cn);
if (cn->unmade_cohorts != 0)
Lst_ForEach(cn->cohorts, MakeBuildChild, toBeMade_next);
/*
* If this node is a .WAIT node with unmade chlidren
* then don't add the next sibling.
*/
return cn->type & OP_WAIT && cn->unmade > 0;
}
/* When a .ORDER RHS node completes we do this on each LHS */
static int
MakeBuildParent(void *v_pn, void *toBeMade_next)
{
GNode *pn = v_pn;
if (pn->made != DEFERRED)
return 0;
if (MakeBuildChild(pn, toBeMade_next) == 0) {
/* Mark so that when this node is built we reschedule its parents */
pn->flags |= DONE_ORDER;
}
return 0;
}
static Boolean
MakeStartJobs(void)
{
GNode *gn;
int have_token = 0;
while (!Lst_IsEmpty (toBeMade)) {
/* Get token now to avoid cycling job-list when we only have 1 token */
if (!have_token && !Job_TokenWithdraw())
break;
have_token = 1;
gn = (GNode *)Lst_DeQueue(toBeMade);
if (DEBUG(MAKE))
fprintf(debug_file, "Examining %s%s...\n",
gn->name, gn->cohort_num);
if (gn->made != REQUESTED) {
if (DEBUG(MAKE))
fprintf(debug_file, "state %d\n", gn->made);
make_abort(gn, __LINE__);
}
if (gn->checked == checked) {
/* We've already looked at this node since a job finished... */
if (DEBUG(MAKE))
fprintf(debug_file, "already checked %s%s\n",
gn->name, gn->cohort_num);
gn->made = DEFERRED;
continue;
}
gn->checked = checked;
if (gn->unmade != 0) {
/*
* We can't build this yet, add all unmade children to toBeMade,
* just before the current first element.
*/
gn->made = DEFERRED;
Lst_ForEach(gn->children, MakeBuildChild, Lst_First(toBeMade));
/* and drop this node on the floor */
if (DEBUG(MAKE))
fprintf(debug_file, "dropped %s%s\n", gn->name, gn->cohort_num);
continue;
}
gn->made = BEINGMADE;
if (Make_OODate(gn)) {
if (DEBUG(MAKE)) {
fprintf(debug_file, "out-of-date\n");
}
if (queryFlag) {
return (TRUE);
}
Make_DoAllVar(gn);
Job_Make(gn);
have_token = 0;
} else {
if (DEBUG(MAKE)) {
fprintf(debug_file, "up-to-date\n");
}
gn->made = UPTODATE;
if (gn->type & OP_JOIN) {
/*
* Even for an up-to-date .JOIN node, we need it to have its
* context variables so references to it get the correct
* value for .TARGET when building up the context variables
* of its parent(s)...
*/
Make_DoAllVar(gn);
}
Make_Update(gn);
}
}
if (have_token)
Job_TokenReturn();
return (FALSE);
}
/*-
*-----------------------------------------------------------------------
* MakePrintStatus --
* Print the status of a top-level node, viz. it being up-to-date
* already or not created due to an error in a lower level.
* Callback function for Make_Run via Lst_ForEach.
*
* Input:
* gnp Node to examine
* cyclep True if gn->unmade being non-zero implies a
* cycle in the graph, not an error in an
* inferior.
*
* Results:
* Always returns 0.
*
* Side Effects:
* A message may be printed.
*
*-----------------------------------------------------------------------
*/
static int
MakePrintStatusOrder(void *ognp, void *gnp)
{
GNode *ogn = ognp;
GNode *gn = gnp;
if (!(ogn->flags & REMAKE) || ogn->made > REQUESTED)
/* not waiting for this one */
return 0;
printf(" `%s%s' has .ORDER dependency against %s%s "
"(made %d, flags %x, type %x)\n",
gn->name, gn->cohort_num,
ogn->name, ogn->cohort_num, ogn->made, ogn->flags, ogn->type);
if (DEBUG(MAKE) && debug_file != stdout)
fprintf(debug_file, " `%s%s' has .ORDER dependency against %s%s "
"(made %d, flags %x, type %x)\n",
gn->name, gn->cohort_num,
ogn->name, ogn->cohort_num, ogn->made, ogn->flags, ogn->type);
return 0;
}
static int
MakePrintStatus(void *gnp, void *v_errors)
{
GNode *gn = (GNode *)gnp;
int *errors = v_errors;
if (gn->flags & DONECYCLE)
/* We've completely processed this node before, don't do it again. */
return 0;
if (gn->unmade == 0) {
gn->flags |= DONECYCLE;
switch (gn->made) {
case UPTODATE:
printf("`%s%s' is up to date.\n", gn->name, gn->cohort_num);
break;
case MADE:
break;
case UNMADE:
case DEFERRED:
case REQUESTED:
case BEINGMADE:
(*errors)++;
printf("`%s%s' was not built (made %d, flags %x, type %x)!\n",
gn->name, gn->cohort_num, gn->made, gn->flags, gn->type);
if (DEBUG(MAKE) && debug_file != stdout)
fprintf(debug_file,
"`%s%s' was not built (made %d, flags %x, type %x)!\n",
gn->name, gn->cohort_num, gn->made, gn->flags, gn->type);
/* Most likely problem is actually caused by .ORDER */
Lst_ForEach(gn->order_pred, MakePrintStatusOrder, gn);
break;
default:
/* Errors - already counted */
printf("`%s%s' not remade because of errors.\n",
gn->name, gn->cohort_num);
if (DEBUG(MAKE) && debug_file != stdout)
fprintf(debug_file, "`%s%s' not remade because of errors.\n",
gn->name, gn->cohort_num);
break;
}
return 0;
}
if (DEBUG(MAKE))
fprintf(debug_file, "MakePrintStatus: %s%s has %d unmade children\n",
gn->name, gn->cohort_num, gn->unmade);
/*
* If printing cycles and came to one that has unmade children,
* print out the cycle by recursing on its children.
*/
if (!(gn->flags & CYCLE)) {
/* Fist time we've seen this node, check all children */
gn->flags |= CYCLE;
Lst_ForEach(gn->children, MakePrintStatus, errors);
/* Mark that this node needn't be processed again */
gn->flags |= DONECYCLE;
return 0;
}
/* Only output the error once per node */
gn->flags |= DONECYCLE;
Error("Graph cycles through `%s%s'", gn->name, gn->cohort_num);
if ((*errors)++ > 100)
/* Abandon the whole error report */
return 1;
/* Reporting for our children will give the rest of the loop */
Lst_ForEach(gn->children, MakePrintStatus, errors);
return 0;
}
/*-
*-----------------------------------------------------------------------
* Make_ExpandUse --
* Expand .USE nodes and create a new targets list
*
* Input:
* targs the initial list of targets
*
* Side Effects:
*-----------------------------------------------------------------------
*/
void
Make_ExpandUse(Lst targs)
{
GNode *gn; /* a temporary pointer */
Lst examine; /* List of targets to examine */
examine = Lst_Duplicate(targs, NULL);
/*
* Make an initial downward pass over the graph, marking nodes to be made
* as we go down. We call Suff_FindDeps to find where a node is and
* to get some children for it if it has none and also has no commands.
* If the node is a leaf, we stick it on the toBeMade queue to
* be looked at in a minute, otherwise we add its children to our queue
* and go on about our business.
*/
while (!Lst_IsEmpty (examine)) {
gn = (GNode *)Lst_DeQueue(examine);
if (gn->flags & REMAKE)
/* We've looked at this one already */
continue;
gn->flags |= REMAKE;
if (DEBUG(MAKE))
fprintf(debug_file, "Make_ExpandUse: examine %s%s\n",
gn->name, gn->cohort_num);
if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) {
/* Append all the 'cohorts' to the list of things to examine */
Lst new;
new = Lst_Duplicate(gn->cohorts, NULL);
Lst_Concat(new, examine, LST_CONCLINK);
examine = new;
}
/*
* Apply any .USE rules before looking for implicit dependencies
* to make sure everything has commands that should...
* Make sure that the TARGET is set, so that we can make
* expansions.
*/
if (gn->type & OP_ARCHV) {
char *eoa, *eon;
eoa = strchr(gn->name, '(');
eon = strchr(gn->name, ')');
if (eoa == NULL || eon == NULL)
continue;
*eoa = '\0';
*eon = '\0';
Var_Set(MEMBER, eoa + 1, gn, 0);
Var_Set(ARCHIVE, gn->name, gn, 0);
*eoa = '(';
*eon = ')';
}
(void)Dir_MTime(gn);
Var_Set(TARGET, gn->path ? gn->path : gn->name, gn, 0);
Lst_ForEach(gn->children, MakeUnmark, gn);
Lst_ForEach(gn->children, MakeHandleUse, gn);
if ((gn->type & OP_MADE) == 0)
Suff_FindDeps(gn);
else {
/* Pretend we made all this node's children */
Lst_ForEach(gn->children, MakeFindChild, gn);
if (gn->unmade != 0)
printf("Warning: %s%s still has %d unmade children\n",
gn->name, gn->cohort_num, gn->unmade);
}
if (gn->unmade != 0)
Lst_ForEach(gn->children, MakeAddChild, examine);
}
Lst_Destroy(examine, NULL);
}
/*-
*-----------------------------------------------------------------------
* Make_ProcessWait --
* Convert .WAIT nodes into dependencies
*
* Input:
* targs the initial list of targets
*
*-----------------------------------------------------------------------
*/
static int
link_parent(void *cnp, void *pnp)
{
GNode *cn = cnp;
GNode *pn = pnp;
Lst_AtEnd(pn->children, cn);
Lst_AtEnd(cn->parents, pn);
pn->unmade++;
return 0;
}
static int
add_wait_dep(void *v_cn, void *v_wn)
{
GNode *cn = v_cn;
GNode *wn = v_wn;
if (cn == wn)
return 1;
if (cn == NULL || wn == NULL) {
printf("bad wait dep %p %p\n", cn, wn);
exit(4);
}
if (DEBUG(MAKE))
fprintf(debug_file, ".WAIT: add dependency %s%s -> %s\n",
cn->name, cn->cohort_num, wn->name);
Lst_AtEnd(wn->children, cn);
wn->unmade++;
Lst_AtEnd(cn->parents, wn);
return 0;
}
static void
Make_ProcessWait(Lst targs)
{
GNode *pgn; /* 'parent' node we are examining */
GNode *cgn; /* Each child in turn */
LstNode owln; /* Previous .WAIT node */
Lst examine; /* List of targets to examine */
LstNode ln;
/*
* We need all the nodes to have a common parent in order for the
* .WAIT and .ORDER scheduling to work.
* Perhaps this should be done earlier...
*/
pgn = Targ_NewGN(".MAIN");
pgn->flags = REMAKE;
pgn->type = OP_PHONY | OP_DEPENDS;
/* Get it displayed in the diag dumps */
Lst_AtFront(Targ_List(), pgn);
Lst_ForEach(targs, link_parent, pgn);
/* Start building with the 'dummy' .MAIN' node */
MakeBuildChild(pgn, NULL);
examine = Lst_Init(FALSE);
Lst_AtEnd(examine, pgn);
while (!Lst_IsEmpty (examine)) {
pgn = Lst_DeQueue(examine);
/* We only want to process each child-list once */
if (pgn->flags & DONE_WAIT)
continue;
pgn->flags |= DONE_WAIT;
if (DEBUG(MAKE))
fprintf(debug_file, "Make_ProcessWait: examine %s\n", pgn->name);
if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) {
/* Append all the 'cohorts' to the list of things to examine */
Lst new;
new = Lst_Duplicate(pgn->cohorts, NULL);
Lst_Concat(new, examine, LST_CONCLINK);
examine = new;
}
owln = Lst_First(pgn->children);
Lst_Open(pgn->children);
for (; (ln = Lst_Next(pgn->children)) != NULL; ) {
cgn = Lst_Datum(ln);
if (cgn->type & OP_WAIT) {
/* Make the .WAIT node depend on the previous children */
Lst_ForEachFrom(pgn->children, owln, add_wait_dep, cgn);
owln = ln;
} else {
Lst_AtEnd(examine, cgn);
}
}
Lst_Close(pgn->children);
}
Lst_Destroy(examine, NULL);
}
/*-
*-----------------------------------------------------------------------
* Make_Run --
* Initialize the nodes to remake and the list of nodes which are
* ready to be made by doing a breadth-first traversal of the graph
* starting from the nodes in the given list. Once this traversal
* is finished, all the 'leaves' of the graph are in the toBeMade
* queue.
* Using this queue and the Job module, work back up the graph,
* calling on MakeStartJobs to keep the job table as full as
* possible.
*
* Input:
* targs the initial list of targets
*
* Results:
* TRUE if work was done. FALSE otherwise.
*
* Side Effects:
* The make field of all nodes involved in the creation of the given
* targets is set to 1. The toBeMade list is set to contain all the
* 'leaves' of these subgraphs.
*-----------------------------------------------------------------------
*/
Boolean
Make_Run(Lst targs)
{
int errors; /* Number of errors the Job module reports */
/* Start trying to make the current targets... */
toBeMade = Lst_Init(FALSE);
Make_ExpandUse(targs);
Make_ProcessWait(targs);
if (DEBUG(MAKE)) {
fprintf(debug_file, "#***# full graph\n");
Targ_PrintGraph(1);
}
if (queryFlag) {
/*
* We wouldn't do any work unless we could start some jobs in the
* next loop... (we won't actually start any, of course, this is just
* to see if any of the targets was out of date)
*/
return (MakeStartJobs());
}
/*
* Initialization. At the moment, no jobs are running and until some
* get started, nothing will happen since the remaining upward
* traversal of the graph is performed by the routines in job.c upon
* the finishing of a job. So we fill the Job table as much as we can
* before going into our loop.
*/
(void)MakeStartJobs();
/*
* Main Loop: The idea here is that the ending of jobs will take
* care of the maintenance of data structures and the waiting for output
* will cause us to be idle most of the time while our children run as
* much as possible. Because the job table is kept as full as possible,
* the only time when it will be empty is when all the jobs which need
* running have been run, so that is the end condition of this loop.
* Note that the Job module will exit if there were any errors unless the
* keepgoing flag was given.
*/
while (!Lst_IsEmpty(toBeMade) || jobTokensRunning > 0) {
Job_CatchOutput();
(void)MakeStartJobs();
}
errors = Job_Finish();
/*
* Print the final status of each target. E.g. if it wasn't made
* because some inferior reported an error.
*/
if (DEBUG(MAKE))
fprintf(debug_file, "done: errors %d\n", errors);
if (errors == 0) {
Lst_ForEach(targs, MakePrintStatus, &errors);
if (DEBUG(MAKE)) {
fprintf(debug_file, "done: errors %d\n", errors);
if (errors)
Targ_PrintGraph(4);
}
}
return errors != 0;
}
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