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Add verilator_gantt profiling of DPI imports (#3084).

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Wilson Snyder
2025-09-21 11:37:44 -04:00
parent 53b8a5b027
commit 9697a5ce6d
10 changed files with 130 additions and 25 deletions
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src/V3Task.cpp
+16 -3
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@@ -681,7 +681,7 @@ class TaskVisitor final : public VNVisitor {
}
}
// First argument is symbol table, then output if a function
const bool needSyms = !refp->taskp()->dpiImport();
const bool needSyms = !refp->taskp()->dpiImport() || v3Global.opt.profExec();
if (needSyms) ccallp->argTypes("vlSymsp");
if (refp->taskp()->dpiContext()) {
@@ -972,7 +972,7 @@ class TaskVisitor final : public VNVisitor {
if (rtnvarp) {
funcp->addStmtsp(createDpiTemp(rtnvarp, ""));
funcp->addStmtsp(createAssignInternalToDpi(rtnvarp, false, tmpSuffixp, ""));
string stmt = "return " + rtnvarp->name();
string stmt = "return " + rtnvarp->name(); // TODO use AstCReturn?
stmt += rtnvarp->basicp()->isDpiPrimitive() ? ";\n" : "[0];\n";
funcp->addStmtsp(new AstCStmt{nodep->fileline(), stmt});
}
@@ -1077,6 +1077,12 @@ class TaskVisitor final : public VNVisitor {
void bodyDpiImportFunc(AstNodeFTask* nodep, AstVarScope* rtnvscp, AstCFunc* cfuncp,
AstCFunc* dpiFuncp) {
const char* const tmpSuffixp = V3Task::dpiTemporaryVarSuffix();
if (v3Global.opt.profExec())
cfuncp->addStmtsp(
new AstCStmt{nodep->fileline(),
"VL_EXEC_TRACE_ADD_RECORD(vlSymsp).sectionPush(\"dpiimports\");\n"});
// Convert input/inout arguments to DPI types
string args;
for (AstNode* stmtp = cfuncp->argsp(); stmtp; stmtp = stmtp->nextp()) {
@@ -1162,6 +1168,10 @@ class TaskVisitor final : public VNVisitor {
}
}
}
if (v3Global.opt.profExec())
cfuncp->addStmtsp(new AstCStmt{nodep->fileline(),
"VL_EXEC_TRACE_ADD_RECORD(vlSymsp).sectionPop();\n"});
}
AstVarScope* getDpiExporTrigger() {
@@ -1285,9 +1295,12 @@ class TaskVisitor final : public VNVisitor {
if (cfuncp->dpiImportWrapper()) cfuncp->cname(nodep->cname());
const bool needSyms
= (!nodep->dpiImport() && !nodep->taskPublic()) || v3Global.opt.profExec();
if (needSyms) cfuncp->argTypes(EmitCUtil::symClassVar());
if (!nodep->dpiImport() && !nodep->taskPublic()) {
// Need symbol table
cfuncp->argTypes(EmitCUtil::symClassVar());
if (cfuncp->name() == "new") {
const string stmt = VIdProtect::protect("_ctor_var_reset") + "(vlSymsp);\n";
cfuncp->addInitsp(new AstCStmt{nodep->fileline(), stmt});