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// Copyright (c) 2023-2026, The OpenROAD Authors
#include <string>
#include "Test3DBloxCheckerFixture.h"
#include "gtest/gtest.h"
#include "odb/3dblox.h"
#include "odb/db.h"
#include "odb/dbObject.h"
#include "odb/geom.h"
namespace odb {
namespace {
TEST_F(CheckerFixture, test_no_violations)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500)); // Stacked on top
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn1 = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn1->setThickness(0);
check();
EXPECT_TRUE(getMarkers(floating_chips_category).empty());
EXPECT_TRUE(getMarkers(overlapping_chips_category).empty());
EXPECT_TRUE(getMarkers(connected_regions_category).empty());
}
TEST_F(CheckerFixture, test_overlapping_chips)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(500, 500, 0)); // Overlaps in 3D
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
auto markers = getMarkers(overlapping_chips_category);
EXPECT_EQ(markers.size(), 1);
if (!markers.empty()) {
auto sources = markers[0]->getSources();
EXPECT_EQ(sources.size(), 2);
}
}
TEST_F(CheckerFixture, test_single_floating_chip)
{
// inst1 and inst2 connected, inst3 floating
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst3 = dbChipInst::create(top_chip_, chip1_, "inst3");
inst3->setLoc(Point3D(5000, 5000, 0)); // Floating
inst3->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn1 = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn1->setThickness(0);
check();
auto markers = getMarkers(floating_chips_category);
EXPECT_EQ(markers.size(), 1);
if (!markers.empty()) {
auto sources = markers[0]->getSources();
EXPECT_EQ(sources.size(), 1);
}
}
TEST_F(CheckerFixture, test_multiple_floating_groups)
{
// Group 1: inst1 -> inst2 (Connected)
// Group 2: inst3 (Floating)
// Group 3: inst4 (Floating)
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst3 = dbChipInst::create(top_chip_, chip1_, "inst3");
inst3->setLoc(Point3D(5000, 5000, 0));
inst3->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst4 = dbChipInst::create(top_chip_, chip2_, "inst4");
inst4->setLoc(Point3D(7000, 7000, 0));
inst4->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn1 = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn1->setThickness(0);
check();
auto markers = getMarkers(floating_chips_category);
EXPECT_EQ(markers.size(), 2);
}
TEST_F(CheckerFixture, test_connectivity_gap)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn->setThickness(100); // Expect gap of 100
// Case 1: Valid connection
// inst1 top is at 500. inst2 bot should be at 500 + 100 = 600
inst2->setLoc(Point3D(0, 0, 600));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
EXPECT_TRUE(getMarkers(floating_chips_category).empty());
// Case 2: Broken connection (gap too large)
// Move inst2 to 800
inst2->setLoc(Point3D(0, 0, 800));
check();
EXPECT_EQ(getMarkers(floating_chips_category).size(), 1);
}
TEST_F(CheckerFixture, test_abutment_no_overlap)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip1_, "inst2");
inst2->setLoc(Point3D(2000, 0, 0)); // Abuts at x=2000 (since width is 2000)
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
EXPECT_TRUE(getMarkers(overlapping_chips_category).empty());
}
TEST_F(CheckerFixture, test_close_proximity_no_overlap)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip1_, "inst2");
inst2->setLoc(Point3D(2001, 0, 0)); // 1 unit gap
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
EXPECT_TRUE(getMarkers(overlapping_chips_category).empty());
}
TEST_F(CheckerFixture, test_z_separation_no_overlap)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip1_, "inst2");
inst2->setLoc(Point3D(0, 0, 600)); // gap in Z (thick=500, so gap=100)
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
EXPECT_TRUE(getMarkers(overlapping_chips_category).empty());
}
TEST_F(CheckerFixture, test_overlap_despite_valid_connection)
{
// Create INTERNAL_EXT regions for masking
auto r1_int = dbChipRegion::create(
chip1_, "r1_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r1_int->setBox(Rect(0, 0, 2000, 2000));
auto r2_int = dbChipRegion::create(
chip2_, "r2_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r2_int->setBox(Rect(0, 0, 1500, 1500));
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(100, 100, 0)); // Geometric overlap
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
// Connect them
auto* ri1 = inst1->findChipRegionInst("r1_int");
auto* ri2 = inst2->findChipRegionInst("r2_int");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
EXPECT_EQ(getMarkers(overlapping_chips_category).size(), 1);
}
TEST_F(CheckerFixture, test_overlap_partially_covered_by_connection)
{
// Create small INTERNAL_EXT regions that don't cover the full overlap
auto r1_int = dbChipRegion::create(
chip1_, "r1_int_small", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r1_int->setBox(Rect(0, 0, 50, 50));
auto r2_int = dbChipRegion::create(
chip2_, "r2_int_small", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r2_int->setBox(Rect(0, 0, 50, 50));
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 0)); // Full overlap of chip2 inside chip1
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
// Connect them with small regions
auto* ri1 = inst1->findChipRegionInst("r1_int_small");
auto* ri2 = inst2->findChipRegionInst("r2_int_small");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
EXPECT_EQ(getMarkers(overlapping_chips_category).size(), 1);
}
TEST_F(CheckerFixture, test_overlap_with_invalid_connection)
{
// Use FRONT/BACK regions - these should NOT mask overlaps
// because masking requires INTERNAL regions
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 0)); // Overlap
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
EXPECT_EQ(getMarkers(overlapping_chips_category).size(), 1);
}
TEST_F(CheckerFixture, test_multiple_chips_complex_overlap)
{
// inst1: 0..2000
// inst2: 100..1600 (chip2 w=1500) overlaps inst1
// inst3: 3000..5000 (chip1 w=2000) no overlap
// inst4: 3100..5100 (chip1 w=2000) overlaps inst3
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(100, 0, 0));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst3 = dbChipInst::create(top_chip_, chip1_, "inst3");
inst3->setLoc(Point3D(3000, 0, 0));
inst3->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst4 = dbChipInst::create(top_chip_, chip1_, "inst4");
inst4->setLoc(Point3D(3100, 0, 0));
inst4->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
auto markers = getMarkers(overlapping_chips_category);
EXPECT_EQ(markers.size(), 2);
}
TEST_F(CheckerFixture, test_unused_internal_ext)
{
// internal_ext region on chip1. Not connected.
auto r1_int = dbChipRegion::create(
chip1_, "r1_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r1_int->setBox(Rect(0, 0, 2000, 2000));
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
check();
auto markers = getMarkers(unused_internal_ext_category);
EXPECT_EQ(markers.size(), 1);
if (!markers.empty()) {
auto sources = markers[0]->getSources();
EXPECT_EQ(sources.size(), 1);
// Source should be the region instance
if (!sources.empty()) {
auto* source = *sources.begin();
EXPECT_EQ(source->getObjectType(), dbChipRegionInstObj);
auto* region_inst = static_cast<dbChipRegionInst*>(source);
EXPECT_NE(region_inst, nullptr);
if (region_inst) {
EXPECT_EQ(region_inst->getChipRegion()->getName(), "r1_int");
}
}
}
}
TEST_F(CheckerFixture, test_used_internal_ext)
{
// internal_ext region on chip1
auto r1_int = dbChipRegion::create(
chip1_, "r1_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r1_int->setBox(Rect(0, 0, 2000, 2000));
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
// Connect them
auto* ri1 = inst1->findChipRegionInst("r1_int");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
EXPECT_TRUE(getMarkers(unused_internal_ext_category).empty());
}
TEST_F(CheckerFixture, test_connection_invalid_xy)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(3000, 3000, 500)); // No XY overlap
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn->setThickness(0);
check();
auto markers = getMarkers(connected_regions_category);
ASSERT_EQ(markers.size(), 1);
EXPECT_NE(markers[0]->getComment().find("do not overlap in the XY plane"),
std::string::npos);
}
TEST_F(CheckerFixture, test_connection_invalid_sides)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500));
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
// Both regions are on the FRONT side, but facing each other requires one to
// be BACK
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_fr");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
auto markers = getMarkers(connected_regions_category);
ASSERT_EQ(markers.size(), 1);
EXPECT_NE(markers[0]->getComment().find("Ill-defined stacking direction"),
std::string::npos);
}
TEST_F(CheckerFixture, test_connection_swapped_top_bottom)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500)); // Stacked on top
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
// The regions mate physically, but the connection declares the lower die's
// region as top and the upper die's region as bottom.
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
auto markers = getMarkers(connected_regions_category);
ASSERT_EQ(markers.size(), 1);
EXPECT_NE(markers[0]->getComment().find("Ill-defined stacking direction"),
std::string::npos);
}
TEST_F(CheckerFixture, test_connection_in_z_mirrored_assembly)
{
// Assembly with chip2 stacked on chip1 and a properly declared connection:
// top is the upper die's down-facing region.
auto* assembly
= dbChip::create(db_.get(), nullptr, "Assembly", dbChip::ChipType::HIER);
auto inst1 = dbChipInst::create(assembly, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(assembly, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 500)); // Stacked on top
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", assembly, {inst2}, ri2, {inst1}, ri1);
conn->setThickness(0);
// Mirror the whole assembly in Z at the top level. In world coordinates
// r1_fr now faces down from above and r2_bk faces up from below.
auto asm_inst = dbChipInst::create(top_chip_, assembly, "asm_inst");
asm_inst->setOrient(dbOrientType3D(dbOrientType::R0, true));
asm_inst->setLoc(Point3D(0, 0, 0));
check();
EXPECT_TRUE(getMarkers(connected_regions_category).empty());
// The unfolded connection reflects world orientation: the declared roles
// swap under the mirror.
auto conns = db_->getUnfoldedChipConns();
ASSERT_EQ(conns.size(), 1);
dbUnfoldedChipConn* uf_conn = *conns.begin();
EXPECT_EQ(
uf_conn->getTopRegion()->getChipRegionInst()->getChipRegion()->getName(),
"r1_fr");
EXPECT_EQ(uf_conn->getBottomRegion()
->getChipRegionInst()
->getChipRegion()
->getName(),
"r2_bk");
}
TEST_F(CheckerFixture, test_connection_thickness_mismatch)
{
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 600)); // Distance is 100
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_fr");
auto* ri2 = inst2->findChipRegionInst("r2_bk");
auto* conn = dbChipConn::create("c1", top_chip_, {inst2}, ri2, {inst1}, ri1);
conn->setThickness(50); // Mismatch (100 != 50)
check();
auto markers = getMarkers(connected_regions_category);
ASSERT_EQ(markers.size(), 1);
EXPECT_NE(
markers[0]->getComment().find("does not match connection thickness"),
std::string::npos);
}
TEST_F(CheckerFixture, test_connection_internal_ext)
{
// internal_ext regions overlap in Z
auto r1_int = dbChipRegion::create(
chip1_, "r1_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r1_int->setBox(Rect(0, 0, 2000, 2000));
auto r2_int = dbChipRegion::create(
chip2_, "r2_int", dbChipRegion::Side::INTERNAL_EXT, nullptr);
r2_int->setBox(Rect(0, 0, 1500, 1500));
auto inst1 = dbChipInst::create(top_chip_, chip1_, "inst1");
inst1->setLoc(Point3D(0, 0, 0));
inst1->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto inst2 = dbChipInst::create(top_chip_, chip2_, "inst2");
inst2->setLoc(Point3D(0, 0, 100)); // Z overlap since chip1 thickness is 500
inst2->setOrient(dbOrientType3D(dbOrientType::R0, false));
auto* ri1 = inst1->findChipRegionInst("r1_int");
auto* ri2 = inst2->findChipRegionInst("r2_int");
auto* conn = dbChipConn::create("c1", top_chip_, {inst1}, ri1, {inst2}, ri2);
conn->setThickness(0);
check();
EXPECT_TRUE(getMarkers(connected_regions_category).empty());
// Test failure: move inst2 outside Z-range of inst1
inst2->setLoc(Point3D(0, 0, 600));
check();
auto markers = getMarkers(connected_regions_category);
ASSERT_EQ(markers.size(), 1);
EXPECT_NE(markers[0]->getComment().find("do not overlap in Z"),
std::string::npos);
}
} // namespace
} // namespace odb
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