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freebsd-nq/contrib/bmake/make.c

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/* $NetBSD: make.c,v 1.244 2021/04/04 10:05:08 rillig 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.
*/
/*
* Examination of targets and their suitability for creation.
*
* Interface:
* Make_Run Initialize things for the module. Returns true if
* work was (or would have been) done.
*
* Make_Update After a target is made, update all its parents.
* Perform various bookkeeping chores like the updating
* of the youngestChild field of the parent, filling
* of the IMPSRC variable, etc. Place the parent on the
* toBeMade queue if it should be.
*
* GNode_UpdateYoungestChild
* Update the node's youngestChild field based on the
* child's modification time.
*
* GNode_SetLocalVars
* 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.
*
* GNode_IsOODate 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 "dir.h"
#include "job.h"
/* "@(#)make.c 8.1 (Berkeley) 6/6/93" */
MAKE_RCSID("$NetBSD: make.c,v 1.244 2021/04/04 10:05:08 rillig Exp $");
/* Sequence # to detect recursion. */
static unsigned int checked_seqno = 1;
/*
* 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 GNodeList toBeMade = LST_INIT;
void
debug_printf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfprintf(opts.debug_file, fmt, args);
va_end(args);
}
MAKE_ATTR_DEAD static void
make_abort(GNode *gn, int lineno)
{
debug_printf("make_abort from line %d\n", lineno);
Targ_PrintNode(gn, 2);
Targ_PrintNodes(&toBeMade, 2);
Targ_PrintGraph(3);
abort();
}
ENUM_FLAGS_RTTI_31(GNodeType,
OP_DEPENDS, OP_FORCE, OP_DOUBLEDEP,
/* OP_OPMASK is omitted since it combines other flags */
OP_OPTIONAL, OP_USE, OP_EXEC, OP_IGNORE,
OP_PRECIOUS, OP_SILENT, OP_MAKE, OP_JOIN,
OP_MADE, OP_SPECIAL, OP_USEBEFORE, OP_INVISIBLE,
OP_NOTMAIN, OP_PHONY, OP_NOPATH, OP_WAIT,
OP_NOMETA, OP_META, OP_NOMETA_CMP, OP_SUBMAKE,
OP_TRANSFORM, OP_MEMBER, OP_LIB, OP_ARCHV,
OP_HAS_COMMANDS, OP_SAVE_CMDS, OP_DEPS_FOUND, OP_MARK);
ENUM_FLAGS_RTTI_9(GNodeFlags,
REMAKE, CHILDMADE, FORCE, DONE_WAIT,
DONE_ORDER, FROM_DEPEND, DONE_ALLSRC, CYCLE,
DONECYCLE);
void
GNode_FprintDetails(FILE *f, const char *prefix, const GNode *gn,
const char *suffix)
{
char type_buf[GNodeType_ToStringSize];
char flags_buf[GNodeFlags_ToStringSize];
fprintf(f, "%s%s, type %s, flags %s%s",
prefix,
GNodeMade_Name(gn->made),
GNodeType_ToString(type_buf, gn->type),
GNodeFlags_ToString(flags_buf, gn->flags),
suffix);
}
bool
GNode_ShouldExecute(GNode *gn)
{
return !((gn->type & OP_MAKE)
? opts.noRecursiveExecute
: opts.noExecute);
}
/* Update the youngest child of the node, according to the given child. */
void
GNode_UpdateYoungestChild(GNode *gn, GNode *cgn)
{
if (gn->youngestChild == NULL || cgn->mtime > gn->youngestChild->mtime)
gn->youngestChild = cgn;
}
static bool
IsOODateRegular(GNode *gn)
{
/* These rules are inherited from the original Make. */
if (gn->youngestChild != NULL) {
if (gn->mtime < gn->youngestChild->mtime) {
DEBUG1(MAKE, "modified before source \"%s\"...",
GNode_Path(gn->youngestChild));
return true;
}
return false;
}
if (gn->mtime == 0 && !(gn->type & OP_OPTIONAL)) {
DEBUG0(MAKE, "nonexistent and no sources...");
return true;
}
if (gn->type & OP_DOUBLEDEP) {
DEBUG0(MAKE, ":: operator and no sources...");
return true;
}
return false;
}
/*
* See if the 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.
*
* The mtime field of the node and the youngestChild field of its parents
* may be changed.
*/
bool
GNode_IsOODate(GNode *gn)
{
bool 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))) {
Dir_UpdateMTime(gn, true);
if (DEBUG(MAKE)) {
if (gn->mtime != 0)
debug_printf("modified %s...",
Targ_FmtTime(gn->mtime));
else
debug_printf("nonexistent...");
}
}
/*
* 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 is not
* GNode_IsTarget)
*
* 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*.
*/
DEBUG0(MAKE, ".USE node...");
oodate = false;
} else if ((gn->type & OP_LIB) && (gn->mtime == 0 || Arch_IsLib(gn))) {
DEBUG0(MAKE, "library...");
/*
* always out of date if no children and :: target
* or nonexistent.
*/
oodate = (gn->mtime == 0 || Arch_LibOODate(gn) ||
(gn->youngestChild == NULL &&
(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.
*/
DEBUG0(MAKE, ".JOIN node...");
DEBUG1(MAKE, "source %smade...",
gn->flags & CHILDMADE ? "" : "not ");
oodate = (gn->flags & CHILDMADE) != 0;
} 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) {
debug_printf("! operator...");
} else if (gn->type & OP_PHONY) {
debug_printf(".PHONY node...");
} else {
debug_printf(".EXEC node...");
}
}
oodate = true;
} else if (IsOODateRegular(gn)) {
oodate = true;
} else {
/*
* When a nonexistent 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 nonexistent
* child after it was considered made.
*/
if (DEBUG(MAKE)) {
if (gn->flags & FORCE)
debug_printf("non existing child...");
}
oodate = (gn->flags & FORCE) != 0;
}
#ifdef USE_META
if (useMeta) {
oodate = meta_oodate(gn, oodate);
}
#endif
/*
* 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 are GNode_IsTarget,
* have their mtime stay below their children's mtime to keep parents
* from thinking they're out-of-date.
*/
if (!oodate) {
GNodeListNode *ln;
for (ln = gn->parents.first; ln != NULL; ln = ln->next)
GNode_UpdateYoungestChild(ln->datum, gn);
}
return oodate;
}
static void
PretendAllChildrenAreMade(GNode *pgn)
{
GNodeListNode *ln;
for (ln = pgn->children.first; ln != NULL; ln = ln->next) {
GNode *cgn = ln->datum;
/* This may also update cgn->path. */
Dir_UpdateMTime(cgn, false);
GNode_UpdateYoungestChild(pgn, cgn);
pgn->unmade--;
}
}
/*
* Called by Make_Run and SuffApplyTransform on the downward pass to handle
* .USE and transformation nodes, by copying the child 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 source node, which is either a .USE/.USEBEFORE
* node or a transformation node (OP_TRANSFORM).
* pgn The target node
*/
void
Make_HandleUse(GNode *cgn, GNode *pgn)
{
GNodeListNode *ln; /* An element in the children list */
#ifdef DEBUG_SRC
if (!(cgn->type & (OP_USE | OP_USEBEFORE | OP_TRANSFORM))) {
debug_printf("Make_HandleUse: called for plain node %s\n",
cgn->name);
/* XXX: debug mode should not affect control flow */
return;
}
#endif
if ((cgn->type & (OP_USE | OP_USEBEFORE)) ||
Lst_IsEmpty(&pgn->commands)) {
if (cgn->type & OP_USEBEFORE) {
/* .USEBEFORE */
Lst_PrependAll(&pgn->commands, &cgn->commands);
} else {
/* .USE, or target has no commands */
Lst_AppendAll(&pgn->commands, &cgn->commands);
}
}
for (ln = cgn->children.first; ln != NULL; ln = ln->next) {
GNode *gn = ln->datum;
/*
* 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 {
free(gn->name);
}
(void)Var_Subst(gn->uname, pgn, VARE_WANTRES, &gn->name);
/* TODO: handle errors */
if (gn->uname != NULL && strcmp(gn->name, gn->uname) != 0) {
/* See if we have a target for this node. */
GNode *tgn = Targ_FindNode(gn->name);
if (tgn != NULL)
gn = tgn;
}
Lst_Append(&pgn->children, gn);
Lst_Append(&gn->parents, pgn);
pgn->unmade++;
}
pgn->type |=
cgn->type & ~(OP_OPMASK | OP_USE | OP_USEBEFORE | OP_TRANSFORM);
}
/*
* 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.
*
* For a .USE child, the commands, type flags and children are copied to the
* parent node, and since the relation to the .USE node is then no longer
* needed, that relation is removed.
*
* Input:
* cgn the child, which may be a .USE node
* pgn the current parent
*/
static void
MakeHandleUse(GNode *cgn, GNode *pgn, GNodeListNode *ln)
{
bool unmarked;
unmarked = !(cgn->type & OP_MARK);
cgn->type |= OP_MARK;
if (!(cgn->type & (OP_USE | OP_USEBEFORE)))
return;
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...
*/
Lst_Remove(&pgn->children, ln);
pgn->unmade--;
}
static void
HandleUseNodes(GNode *gn)
{
GNodeListNode *ln, *nln;
for (ln = gn->children.first; ln != NULL; ln = nln) {
nln = ln->next;
MakeHandleUse(ln->datum, gn, ln);
}
}
/*
* Check the modification time of a gnode, and update it if necessary.
* Return 0 if the gnode does not exist, or its filesystem time if it does.
*/
time_t
Make_Recheck(GNode *gn)
{
time_t mtime;
Dir_UpdateMTime(gn, true);
mtime = gn->mtime;
#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_UpdateMTime 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 (!GNode_ShouldExecute(gn) || (gn->type & OP_SAVE_CMDS) ||
(mtime == 0 && !(gn->type & OP_WAIT))) {
DEBUG2(MAKE, " recheck(%s): update time from %s to now\n",
gn->name,
gn->mtime == 0 ? "nonexistent" : Targ_FmtTime(gn->mtime));
gn->mtime = now;
} else {
DEBUG2(MAKE, " recheck(%s): current update time: %s\n",
gn->name, Targ_FmtTime(gn->mtime));
}
#endif
/* XXX: The returned mtime may differ from gn->mtime.
* Intentionally? */
return mtime;
}
/*
* Set the .PREFIX and .IMPSRC variables for all the implied parents
* of this node.
*/
static void
UpdateImplicitParentsVars(GNode *cgn, const char *cname)
{
GNodeListNode *ln;
const char *cpref = GNode_VarPrefix(cgn);
for (ln = cgn->implicitParents.first; ln != NULL; ln = ln->next) {
GNode *pgn = ln->datum;
if (pgn->flags & REMAKE) {
Var_Set(pgn, IMPSRC, cname);
if (cpref != NULL)
Var_Set(pgn, PREFIX, cpref);
}
}
}
/* See if a .ORDER rule stops us from building this node. */
static bool
IsWaitingForOrder(GNode *gn)
{
GNodeListNode *ln;
for (ln = gn->order_pred.first; ln != NULL; ln = ln->next) {
GNode *ogn = ln->datum;
if (GNode_IsDone(ogn) || !(ogn->flags & REMAKE))
continue;
DEBUG2(MAKE,
"IsWaitingForOrder: Waiting for .ORDER node \"%s%s\"\n",
ogn->name, ogn->cohort_num);
return true;
}
return false;
}
static void MakeBuildParent(GNode *, GNodeListNode *);
static void
ScheduleOrderSuccessors(GNode *gn)
{
GNodeListNode *toBeMadeNext = toBeMade.first;
GNodeListNode *ln;
for (ln = gn->order_succ.first; ln != NULL; ln = ln->next)
MakeBuildParent(ln->datum, toBeMadeNext);
}
/*
* 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.
*
* 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.
*
* 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 youngestChild 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)
{
const char *cname; /* the child's name */
time_t mtime = -1;
GNodeList *parents;
GNodeListNode *ln;
GNode *centurion;
/* It is save to re-examine any nodes again */
checked_seqno++;
cname = GNode_VarTarget(cgn);
DEBUG2(MAKE, "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--;
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 */
ScheduleOrderSuccessors(centurion);
/* Now mark all the parents as having one less unmade child */
for (ln = parents->first; ln != NULL; ln = ln->next) {
GNode *pgn = ln->datum;
if (DEBUG(MAKE)) {
debug_printf("inspect parent %s%s: ", pgn->name,
pgn->cohort_num);
GNode_FprintDetails(opts.debug_file, "", pgn, "");
debug_printf(", unmade %d ", pgn->unmade - 1);
}
if (!(pgn->flags & REMAKE)) {
/* This parent isn't needed */
DEBUG0(MAKE, "- 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 unmade
* 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) {
DEBUG0(MAKE, "- .MADE\n");
continue;
}
if (!(cgn->type & (OP_EXEC | OP_USE | OP_USEBEFORE))) {
if (cgn->made == MADE)
pgn->flags |= CHILDMADE;
GNode_UpdateYoungestChild(pgn, cgn);
}
/*
* A parent must wait for the completion of all instances
* of a `::' dependency.
*/
if (centurion->unmade_cohorts != 0 ||
!GNode_IsDone(centurion)) {
DEBUG2(MAKE,
"- centurion made %d, %d unmade cohorts\n",
centurion->made, centurion->unmade_cohorts);
continue;
}
/* One more child of this parent is now made */
pgn->unmade--;
if (pgn->unmade < 0) {
if (DEBUG(MAKE)) {
debug_printf("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)) {
DEBUG0(MAKE, "- 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.
*/
DEBUG0(MAKE, "- not deferred\n");
continue;
}
if (IsWaitingForOrder(pgn))
continue;
if (DEBUG(MAKE)) {
debug_printf("- %s%s made, schedule %s%s (made %d)\n",
cgn->name, cgn->cohort_num,
pgn->name, pgn->cohort_num, pgn->made);
Targ_PrintNode(pgn, 2);
}
/* Ok, we can schedule the parent again */
pgn->made = REQUESTED;
Lst_Enqueue(&toBeMade, pgn);
}
UpdateImplicitParentsVars(cgn, cname);
}
static void
UnmarkChildren(GNode *gn)
{
GNodeListNode *ln;
for (ln = gn->children.first; ln != NULL; ln = ln->next) {
GNode *child = ln->datum;
child->type &= ~OP_MARK;
}
}
/*
* Add a child's name to the ALLSRC and OODATE variables of the given
* node, but 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...)..
*
* Input:
* cgn The child to add
* pgn The parent to whose ALLSRC variable it should
* be added
*/
static void
MakeAddAllSrc(GNode *cgn, GNode *pgn)
{
const char *child, *allsrc;
if (cgn->type & OP_MARK)
return;
cgn->type |= OP_MARK;
if (cgn->type & (OP_EXEC | OP_USE | OP_USEBEFORE | OP_INVISIBLE))
return;
if (cgn->type & OP_ARCHV)
child = GNode_VarMember(cgn);
else
child = GNode_Path(cgn);
if (cgn->type & OP_JOIN)
allsrc = GNode_VarAllsrc(cgn);
else
allsrc = child;
if (allsrc != NULL)
Var_Append(pgn, ALLSRC, allsrc);
if (pgn->type & OP_JOIN) {
if (cgn->made == MADE)
Var_Append(pgn, OODATE, child);
} 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 child,
* the parent is likely to have a modification time
* later than that of the child 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(pgn, OODATE, child);
}
}
/*
* 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.
*
* If the node is a .JOIN node, its TARGET variable will be set to
* match its ALLSRC variable.
*/
void
GNode_SetLocalVars(GNode *gn)
{
GNodeListNode *ln;
if (gn->flags & DONE_ALLSRC)
return;
UnmarkChildren(gn);
for (ln = gn->children.first; ln != NULL; ln = ln->next)
MakeAddAllSrc(ln->datum, gn);
if (!Var_Exists(gn, OODATE))
Var_Set(gn, OODATE, "");
if (!Var_Exists(gn, ALLSRC))
Var_Set(gn, ALLSRC, "");
if (gn->type & OP_JOIN)
Var_Set(gn, TARGET, GNode_VarAllsrc(gn));
gn->flags |= DONE_ALLSRC;
}
static bool
MakeBuildChild(GNode *cn, GNodeListNode *toBeMadeNext)
{
if (DEBUG(MAKE)) {
debug_printf("MakeBuildChild: inspect %s%s, ",
cn->name, cn->cohort_num);
GNode_FprintDetails(opts.debug_file, "", cn, "\n");
}
if (GNode_IsReady(cn))
return false;
/* If this node is on the RHS of a .ORDER, check LHSs. */
if (IsWaitingForOrder(cn)) {
/* Can't build this (or anything else in this child list) yet */
cn->made = DEFERRED;
return false; /* but keep looking */
}
DEBUG2(MAKE, "MakeBuildChild: schedule %s%s\n",
cn->name, cn->cohort_num);
cn->made = REQUESTED;
if (toBeMadeNext == NULL)
Lst_Append(&toBeMade, cn);
else
Lst_InsertBefore(&toBeMade, toBeMadeNext, cn);
if (cn->unmade_cohorts != 0) {
ListNode *ln;
for (ln = cn->cohorts.first; ln != NULL; ln = ln->next)
if (MakeBuildChild(ln->datum, toBeMadeNext))
break;
}
/*
* If this node is a .WAIT node with unmade children
* then don't add the next sibling.
*/
return cn->type & OP_WAIT && cn->unmade > 0;
}
/* When a .ORDER LHS node completes, we do this on each RHS. */
static void
MakeBuildParent(GNode *pn, GNodeListNode *toBeMadeNext)
{
if (pn->made != DEFERRED)
return;
if (!MakeBuildChild(pn, toBeMadeNext)) {
/* When this node is built, reschedule its parents. */
pn->flags |= DONE_ORDER;
}
}
static void
MakeChildren(GNode *gn)
{
GNodeListNode *toBeMadeNext = toBeMade.first;
GNodeListNode *ln;
for (ln = gn->children.first; ln != NULL; ln = ln->next)
if (MakeBuildChild(ln->datum, toBeMadeNext))
break;
}
/*
* Start as many jobs as possible, taking them from the toBeMade queue.
*
* If the -q option was given, no job will be started,
* but as soon as an out-of-date target is found, this function
* returns true. In all other cases, this function returns false.
*/
static bool
MakeStartJobs(void)
{
GNode *gn;
bool have_token = false;
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 = true;
gn = Lst_Dequeue(&toBeMade);
DEBUG2(MAKE, "Examining %s%s...\n", gn->name, gn->cohort_num);
if (gn->made != REQUESTED) {
/*
* XXX: Replace %d with string representation;
* see made_name.
*/
DEBUG1(MAKE, "state %d\n", gn->made);
make_abort(gn, __LINE__);
}
if (gn->checked_seqno == checked_seqno) {
/*
* We've already looked at this node since a job
* finished...
*/
DEBUG2(MAKE, "already checked %s%s\n", gn->name,
gn->cohort_num);
gn->made = DEFERRED;
continue;
}
gn->checked_seqno = checked_seqno;
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;
MakeChildren(gn);
/* and drop this node on the floor */
DEBUG2(MAKE, "dropped %s%s\n", gn->name,
gn->cohort_num);
continue;
}
gn->made = BEINGMADE;
if (GNode_IsOODate(gn)) {
DEBUG0(MAKE, "out-of-date\n");
if (opts.queryFlag)
return true;
GNode_SetLocalVars(gn);
Job_Make(gn);
have_token = false;
} else {
DEBUG0(MAKE, "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 local variables so
* references to it get the correct value
* for .TARGET when building up the local
* variables of its parent(s)...
*/
GNode_SetLocalVars(gn);
}
Make_Update(gn);
}
}
if (have_token)
Job_TokenReturn();
return false;
}
/* Print the status of a .ORDER node. */
static void
MakePrintStatusOrderNode(GNode *ogn, GNode *gn)
{
if (!GNode_IsWaitingFor(ogn))
return;
printf(" `%s%s' has .ORDER dependency against %s%s ",
gn->name, gn->cohort_num, ogn->name, ogn->cohort_num);
GNode_FprintDetails(stdout, "(", ogn, ")\n");
if (DEBUG(MAKE) && opts.debug_file != stdout) {
debug_printf(" `%s%s' has .ORDER dependency against %s%s ",
gn->name, gn->cohort_num, ogn->name, ogn->cohort_num);
GNode_FprintDetails(opts.debug_file, "(", ogn, ")\n");
}
}
static void
MakePrintStatusOrder(GNode *gn)
{
GNodeListNode *ln;
for (ln = gn->order_pred.first; ln != NULL; ln = ln->next)
MakePrintStatusOrderNode(ln->datum, gn);
}
static void MakePrintStatusList(GNodeList *, int *);
/*
* 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.
*/
static bool
MakePrintStatus(GNode *gn, int *errors)
{
if (gn->flags & DONECYCLE) {
/*
* We've completely processed this node before, don't do
* it again.
*/
return false;
}
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", gn->name,
gn->cohort_num);
GNode_FprintDetails(stdout, " (", gn, ")!\n");
if (DEBUG(MAKE) && opts.debug_file != stdout) {
debug_printf("`%s%s' was not built", gn->name,
gn->cohort_num);
GNode_FprintDetails(opts.debug_file, " (", gn,
")!\n");
}
/* Most likely problem is actually caused by .ORDER */
MakePrintStatusOrder(gn);
break;
default:
/* Errors - already counted */
printf("`%s%s' not remade because of errors.\n",
gn->name, gn->cohort_num);
if (DEBUG(MAKE) && opts.debug_file != stdout)
debug_printf(
"`%s%s' not remade because of errors.\n",
gn->name, gn->cohort_num);
break;
}
return false;
}
DEBUG3(MAKE, "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)) {
/* First time we've seen this node, check all children */
gn->flags |= CYCLE;
MakePrintStatusList(&gn->children, errors);
/* Mark that this node needn't be processed again */
gn->flags |= DONECYCLE;
return false;
}
/* 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 true;
/* Reporting for our children will give the rest of the loop */
MakePrintStatusList(&gn->children, errors);
return false;
}
static void
MakePrintStatusList(GNodeList *gnodes, int *errors)
{
GNodeListNode *ln;
for (ln = gnodes->first; ln != NULL; ln = ln->next)
if (MakePrintStatus(ln->datum, errors))
break;
}
static void
ExamineLater(GNodeList *examine, GNodeList *toBeExamined)
{
ListNode *ln;
for (ln = toBeExamined->first; ln != NULL; ln = ln->next) {
GNode *gn = ln->datum;
if (gn->flags & REMAKE)
continue;
if (gn->type & (OP_USE | OP_USEBEFORE))
continue;
DEBUG2(MAKE, "ExamineLater: need to examine \"%s%s\"\n",
gn->name, gn->cohort_num);
Lst_Enqueue(examine, gn);
}
}
/*
* Expand .USE nodes and create a new targets list.
*
* Input:
* targs the initial list of targets
*/
void
Make_ExpandUse(GNodeList *targs)
{
GNodeList examine = LST_INIT; /* Queue of targets to examine */
Lst_AppendAll(&examine, targs);
/*
* 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)) {
GNode *gn = Lst_Dequeue(&examine);
if (gn->flags & REMAKE)
/* We've looked at this one already */
continue;
gn->flags |= REMAKE;
DEBUG2(MAKE, "Make_ExpandUse: examine %s%s\n",
gn->name, gn->cohort_num);
if (gn->type & OP_DOUBLEDEP)
Lst_PrependAll(&examine, &gn->cohorts);
/*
* 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 = strchr(gn->name, '(');
char *eon = strchr(gn->name, ')');
if (eoa == NULL || eon == NULL)
continue;
*eoa = '\0';
*eon = '\0';
Var_Set(gn, MEMBER, eoa + 1);
Var_Set(gn, ARCHIVE, gn->name);
*eoa = '(';
*eon = ')';
}
Dir_UpdateMTime(gn, false);
Var_Set(gn, TARGET, GNode_Path(gn));
UnmarkChildren(gn);
HandleUseNodes(gn);
if (!(gn->type & OP_MADE))
Suff_FindDeps(gn);
else {
PretendAllChildrenAreMade(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)
ExamineLater(&examine, &gn->children);
}
Lst_Done(&examine);
}
/* Make the .WAIT node depend on the previous children */
static void
add_wait_dependency(GNodeListNode *owln, GNode *wn)
{
GNodeListNode *cln;
GNode *cn;
for (cln = owln; (cn = cln->datum) != wn; cln = cln->next) {
DEBUG3(MAKE, ".WAIT: add dependency %s%s -> %s\n",
cn->name, cn->cohort_num, wn->name);
/* XXX: This pattern should be factored out, it repeats often */
Lst_Append(&wn->children, cn);
wn->unmade++;
Lst_Append(&cn->parents, wn);
}
}
/* Convert .WAIT nodes into dependencies. */
static void
Make_ProcessWait(GNodeList *targs)
{
GNode *pgn; /* 'parent' node we are examining */
GNodeListNode *owln; /* Previous .WAIT node */
GNodeList examine; /* List of targets to examine */
/*
* 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 = GNode_New(".MAIN");
pgn->flags = REMAKE;
pgn->type = OP_PHONY | OP_DEPENDS;
/* Get it displayed in the diag dumps */
Lst_Prepend(Targ_List(), pgn);
{
GNodeListNode *ln;
for (ln = targs->first; ln != NULL; ln = ln->next) {
GNode *cgn = ln->datum;
Lst_Append(&pgn->children, cgn);
Lst_Append(&cgn->parents, pgn);
pgn->unmade++;
}
}
/* Start building with the 'dummy' .MAIN' node */
MakeBuildChild(pgn, NULL);
Lst_Init(&examine);
Lst_Append(&examine, pgn);
while (!Lst_IsEmpty(&examine)) {
GNodeListNode *ln;
pgn = Lst_Dequeue(&examine);
/* We only want to process each child-list once */
if (pgn->flags & DONE_WAIT)
continue;
pgn->flags |= DONE_WAIT;
DEBUG1(MAKE, "Make_ProcessWait: examine %s\n", pgn->name);
if (pgn->type & OP_DOUBLEDEP)
Lst_PrependAll(&examine, &pgn->cohorts);
owln = pgn->children.first;
for (ln = pgn->children.first; ln != NULL; ln = ln->next) {
GNode *cgn = ln->datum;
if (cgn->type & OP_WAIT) {
add_wait_dependency(owln, cgn);
owln = ln;
} else {
Lst_Append(&examine, cgn);
}
}
}
Lst_Done(&examine);
}
/*
* 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.
*/
bool
Make_Run(GNodeList *targs)
{
int errors; /* Number of errors the Job module reports */
/* Start trying to make the current targets... */
Lst_Init(&toBeMade);
Make_ExpandUse(targs);
Make_ProcessWait(targs);
if (DEBUG(MAKE)) {
debug_printf("#***# full graph\n");
Targ_PrintGraph(1);
}
if (opts.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.
*/
DEBUG1(MAKE, "done: errors %d\n", errors);
if (errors == 0) {
MakePrintStatusList(targs, &errors);
if (DEBUG(MAKE)) {
debug_printf("done: errors %d\n", errors);
if (errors > 0)
Targ_PrintGraph(4);
}
}
return errors > 0;
}
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