/** Read a source file and compile it up to the the current job's last barrier. */ public boolean readSource(FileSource source) { // Add a new SourceJob for the given source. If a Job for the source // already exists, then we will be given the existing job. SourceJob job = addJob(source); if (job == null) { // addJob returns null if the job has already been completed, in // which case we can just ignore the request to read in the source. return true; } // Run the new job up to the currentJob's SourceJob's last barrier, to // make sure that dependencies are satisfied. Pass.ID barrier; if (currentJob != null) { if (currentJob.sourceJob().lastBarrier() == null) { throw new InternalCompilerError( "A Source Job which has " + "not reached a barrier cannot read another " + "source file."); } barrier = currentJob.sourceJob().lastBarrier().id(); } else { barrier = Pass.FIRST_BARRIER; } // Make sure we reach at least the first barrier defined // in the base compiler. This forces types to be constructed. // If FIRST_BARRIER is before "barrier", // then the second runToPass will just return true. return runToPass(job, barrier) && runToPass(job, Pass.FIRST_BARRIER); }
/** Adds a dependency from the current job to the given Source. */ public void addDependencyToCurrentJob(Source s) { if (s == null) return; if (currentJob != null) { Object o = jobs.get(s); if (o != COMPLETED_JOB) { if (Report.should_report(Report.frontend, 2)) { Report.report(2, "Adding dependency from " + currentJob.source() + " to " + s); } currentJob.sourceJob().addDependency(s); } } else { throw new InternalCompilerError("No current job!"); } }
/** * Before running <code>Pass pass</code> on <code>SourceJob job</code> make sure that all * appropriate scheduling invariants are satisfied, to ensure that all passes of other jobs that * <code>job</code> depends on will have already been done. */ protected void enforceInvariants(Job job, Pass pass) throws CyclicDependencyException { SourceJob srcJob = job.sourceJob(); if (srcJob == null) { return; } BarrierPass lastBarrier = srcJob.lastBarrier(); if (lastBarrier != null) { // make sure that _all_ dependent jobs have completed at least up to // the last barrier (not just children). // // Ideally the invariant should be that only the source jobs that // job _depends on_ should be brought up to the last barrier. // This is work to be done in the future... List allDependentSrcs = new ArrayList(srcJob.dependencies()); Iterator i = allDependentSrcs.iterator(); while (i.hasNext()) { Source s = (Source) i.next(); Object o = jobs.get(s); if (o == COMPLETED_JOB) continue; if (o == null) { throw new InternalCompilerError("Unknown source " + s); } SourceJob sj = (SourceJob) o; if (sj.pending(lastBarrier.id())) { // Make the job run up to the last barrier. // We ignore the return result, since even if the job // fails, we will keep on going and see // how far we get... if (Report.should_report(Report.frontend, 3)) { Report.report(3, "Running " + sj + " to " + lastBarrier.id() + " for " + srcJob); } runToPass(sj, lastBarrier.id()); } } } if (pass instanceof GlobalBarrierPass) { // need to make sure that _all_ jobs have completed just up to // this global barrier. // If we hit a cyclic dependency, ignore it and run the other // jobs up to that pass. Then try again to run the cyclic // pass. If we hit the cycle again for the same job, stop. LinkedList barrierWorklist = new LinkedList(jobs.values()); while (!barrierWorklist.isEmpty()) { Object o = barrierWorklist.removeFirst(); if (o == COMPLETED_JOB) continue; SourceJob sj = (SourceJob) o; if (sj.completed(pass.id()) || sj.nextPass() == sj.passByID(pass.id())) { // the source job has either done this global pass // (which is possible if the job was loaded late in the // game), or is right up to the global barrier. continue; } // Make the job run up to just before the global barrier. // We ignore the return result, since even if the job // fails, we will keep on going and see // how far we get... Pass beforeGlobal = sj.getPreviousTo(pass.id()); if (Report.should_report(Report.frontend, 3)) { Report.report(3, "Running " + sj + " to " + beforeGlobal.id() + " for " + srcJob); } // Don't use runToPass, since that catches the // CyclicDependencyException that we should report // back to the caller. while (!sj.pendingPasses().isEmpty()) { Pass p = (Pass) sj.pendingPasses().get(0); runPass(sj, p); if (p == beforeGlobal) { break; } } } } }