Remove VL_PROFILER ifdef. Partial (#3454).

include/verilated_profiler.cpp

@@ -99,6 +99,10 @@ void VlExecutionProfiler::configure(const VerilatedContext& context) {
     }
 }
 
+void VlExecutionProfiler::startWorkerSetup(VlExecutionProfiler* profilep, uint32_t threadId) {
+    profilep->setupThread(threadId);
+}
+
 void VlExecutionProfiler::setupThread(uint32_t threadId) {
     // Reserve some space in the thread-local profiling buffer, in order to try to avoid malloc
     // while profiling.

include/verilated_profiler.h

@@ -23,11 +23,6 @@
 #define VERILATOR_VERILATED_PROFILER_H_
 
 #include "verilatedos.h"
-
-#ifndef VL_PROFILER
-#error "verilated_profiler.h/cpp expects VL_PROFILER (from --prof-{exec, pgo}"
-#endif
-
 #include "verilated.h"
 
 #include <array>
@@ -186,6 +181,9 @@ public:
     void clear() VL_MT_SAFE_EXCLUDES(m_mutex);
     // Write profiling data into file
     void dump(const char* filenamep, uint64_t tickEnd) VL_MT_SAFE_EXCLUDES(m_mutex);
+
+    // Called via VlStartWorkerCb in VlWorkerThread::startWorker
+    static void startWorkerSetup(VlExecutionProfiler* profilep, uint32_t threadId);
 };
 
 //=============================================================================

include/verilated_threads.cpp

@@ -24,10 +24,6 @@
 #include "verilatedos.h"
 #include "verilated_threads.h"
 
-#ifdef VL_PROFILER
-#include "verilated_profiler.h"
-#endif
-
 #include <cstdio>
 #include <memory>
 #include <string>
@@ -52,10 +48,10 @@ VlMTaskVertex::VlMTaskVertex(uint32_t upstreamDepCount)
 // VlWorkerThread
 
 VlWorkerThread::VlWorkerThread(uint32_t threadId, VerilatedContext* contextp,
-                               VlExecutionProfiler* profilerp)
+                               VlExecutionProfiler* profilerp, VlStartWorkerCb startCb)
     : m_ready_size{0}
     , m_exiting{false}
-    , m_cthread{startWorker, this, threadId, profilerp}
+    , m_cthread{startWorker, this, threadId, profilerp, startCb}
     , m_contextp{contextp} {}
 
 VlWorkerThread::~VlWorkerThread() {
@@ -83,13 +79,9 @@ void VlWorkerThread::workerLoop() {
 }
 
 void VlWorkerThread::startWorker(VlWorkerThread* workerp, uint32_t threadId,
-                                 VlExecutionProfiler* profilerp) {
+                                 VlExecutionProfiler* profilerp, VlStartWorkerCb startCb) {
     Verilated::threadContextp(workerp->m_contextp);
-#ifdef VL_PROFILER
-    // Note: setupThread is not defined without VL_PROFILER, hence the #ifdef. Still, we might
-    // not be profiling execution (e.g.: PGO only), so profilerp might still be nullptr.
-    if (profilerp) profilerp->setupThread(threadId);
-#endif
+    if (VL_UNLIKELY(startCb)) startCb(profilerp, threadId);
     workerp->workerLoop();
 }
 
@@ -97,7 +89,7 @@ void VlWorkerThread::startWorker(VlWorkerThread* workerp, uint32_t threadId,
 // VlThreadPool
 
 VlThreadPool::VlThreadPool(VerilatedContext* contextp, int nThreads,
-                           VlExecutionProfiler* profiler) {
+                           VlExecutionProfiler* profilerp, VlStartWorkerCb startCb) {
     // --threads N passes nThreads=N-1, as the "main" threads counts as 1
     ++nThreads;
     const unsigned cpus = std::thread::hardware_concurrency();
@@ -111,7 +103,7 @@ VlThreadPool::VlThreadPool(VerilatedContext* contextp, int nThreads,
     }
     // Create worker threads
     for (uint32_t threadId = 1; threadId < nThreads; ++threadId) {
-        m_workers.push_back(new VlWorkerThread{threadId, contextp, profiler});
+        m_workers.push_back(new VlWorkerThread{threadId, contextp, profilerp, startCb});
     }
 }
 

include/verilated_threads.h

@@ -50,6 +50,9 @@
 #endif
 // clang-format on
 
+class VlExecutionProfiler;
+class VlThreadPool;
+
 // VlMTaskVertex and VlThreadpool will work with multiple model class types.
 // Since the type is opaque to VlMTaskVertex and VlThreadPool, represent it
 // as a void* here.
@@ -57,6 +60,9 @@ using VlSelfP = void*;
 
 using VlExecFnp = void (*)(VlSelfP, bool);
 
+// VlWorkerThread::startWorker callback, used to hook in VlExecutionProfiler
+using VlStartWorkerCb = void (*)(VlExecutionProfiler*, uint32_t threadId);
+
 // Track dependencies for a single MTask.
 class VlMTaskVertex final {
     // MEMBERS
@@ -129,9 +135,6 @@ public:
     }
 };
 
-class VlExecutionProfiler;
-class VlThreadPool;
-
 class VlWorkerThread final {
 private:
     // TYPES
@@ -171,7 +174,7 @@ private:
 public:
     // CONSTRUCTORS
     explicit VlWorkerThread(uint32_t threadId, VerilatedContext* contextp,
-                            VlExecutionProfiler* profilerp);
+                            VlExecutionProfiler* profilerp, VlStartWorkerCb startCb);
     ~VlWorkerThread();
 
     // METHODS
@@ -209,7 +212,7 @@ public:
     }
     void workerLoop();
     static void startWorker(VlWorkerThread* workerp, uint32_t threadId,
-                            VlExecutionProfiler* profilerp);
+                            VlExecutionProfiler* profilerp, VlStartWorkerCb startCb);
 };
 
 class VlThreadPool final {
@@ -221,7 +224,8 @@ public:
     // Construct a thread pool with 'nThreads' dedicated threads. The thread
     // pool will create these threads and make them available to execute tasks
     // via this->workerp(index)->addTask(...)
-    VlThreadPool(VerilatedContext* contextp, int nThreads, VlExecutionProfiler* profilerp);
+    VlThreadPool(VerilatedContext* contextp, int nThreads, VlExecutionProfiler* profilerp,
+                 VlStartWorkerCb startCb);
     ~VlThreadPool();
 
     // METHODS

src/V3EmitCSyms.cpp

@@ -677,8 +677,8 @@ void EmitCSyms::emitSymImp() {
     puts("}\n\n");
 
     // Constructor
-    puts(symClassName() + "::" + symClassName() + "(VerilatedContext* contextp, const char* namep,"
-         + topClassName() + "* modelp)\n");
+    puts(symClassName() + "::" + symClassName()
+         + "(VerilatedContext* contextp, const char* namep, " + topClassName() + "* modelp)\n");
     puts("    : VerilatedSyms{contextp}\n");
     puts("    // Setup internal state of the Syms class\n");
     puts("    , __Vm_modelp{modelp}\n");
@@ -707,7 +707,10 @@ void EmitCSyms::emitSymImp() {
         // duration of the eval call.
         puts("    , __Vm_threadPoolp{new VlThreadPool{_vm_contextp__, "
              + cvtToStr(v3Global.opt.threads() - 1) + ", "
-             + (v3Global.opt.profExec() ? "&__Vm_executionProfiler" : "nullptr") + "}}\n");
+             + (v3Global.opt.profExec()
+                    ? "&__Vm_executionProfiler, &VlExecutionProfiler::startWorkerSetup"
+                    : "nullptr, nullptr")
+             + "}}\n");
     }
 
     puts("    // Setup module instances\n");

src/V3EmitMk.cpp

@@ -197,7 +197,6 @@ public:
         of.puts("# User CFLAGS (from -CFLAGS on Verilator command line)\n");
         of.puts("VM_USER_CFLAGS = \\\n");
         if (!v3Global.opt.libCreate().empty()) of.puts("\t-fPIC \\\n");
-        if (v3Global.opt.usesProfiler()) of.puts("\t-DVL_PROFILER \\\n");
         const V3StringList& cFlags = v3Global.opt.cFlags();
         for (const string& i : cFlags) of.puts("\t" + i + " \\\n");
         of.puts("\n");