Everywhere: Turn #if *_DEBUG into dbgln_if/if constexpr

58 files changed, 316 insertions, 470 deletions

diff --git a/Kernel/ACPI/Parser.cpp b/Kernel/ACPI/Parser.cpp
index 31493b2143..6053971383 100644
--- a/Kernel/ACPI/Parser.cpp
+++ b/Kernel/ACPI/Parser.cpp
@@ -215,26 +215,20 @@ void Parser::try_acpi_shutdown()
 size_t Parser::get_table_size(PhysicalAddress table_header)
 {
     InterruptDisabler disabler;
-#if ACPI_DEBUG
-    dbgln("ACPI: Checking SDT Length");
-#endif
+    dbgln_if(ACPI_DEBUG, "ACPI: Checking SDT Length");
     return map_typed<Structures::SDTHeader>(table_header)->length;
 }
 
 u8 Parser::get_table_revision(PhysicalAddress table_header)
 {
     InterruptDisabler disabler;
-#if ACPI_DEBUG
-    dbgln("ACPI: Checking SDT Revision");
-#endif
+    dbgln_if(ACPI_DEBUG, "ACPI: Checking SDT Revision");
     return map_typed<Structures::SDTHeader>(table_header)->revision;
 }
 
 UNMAP_AFTER_INIT void Parser::initialize_main_system_description_table()
 {
-#if ACPI_DEBUG
-    dbgln("ACPI: Checking Main SDT Length to choose the correct mapping size");
-#endif
+    dbgln_if(ACPI_DEBUG, "ACPI: Checking Main SDT Length to choose the correct mapping size");
     VERIFY(!m_main_system_description_table.is_null());
     auto length = get_table_size(m_main_system_description_table);
     auto revision = get_table_revision(m_main_system_description_table);
diff --git a/Kernel/Arch/i386/CPU.cpp b/Kernel/Arch/i386/CPU.cpp
index 6b54076dab..0a302b750e 100644
--- a/Kernel/Arch/i386/CPU.cpp
+++ b/Kernel/Arch/i386/CPU.cpp
@@ -324,9 +324,7 @@ void page_fault_handler(TrapFrame* trap)
 
         handle_crash(regs, "Page Fault", SIGSEGV, response == PageFaultResponse::OutOfMemory);
     } else if (response == PageFaultResponse::Continue) {
-#if PAGE_FAULT_DEBUG
-        dbgln("Continuing after resolved page fault");
-#endif
+        dbgln_if(PAGE_FAULT_DEBUG, "Continuing after resolved page fault");
     } else {
         VERIFY_NOT_REACHED();
     }
diff --git a/Kernel/Devices/HID/PS2MouseDevice.cpp b/Kernel/Devices/HID/PS2MouseDevice.cpp
index f4947ea209..48bfcdcfd4 100644
--- a/Kernel/Devices/HID/PS2MouseDevice.cpp
+++ b/Kernel/Devices/HID/PS2MouseDevice.cpp
@@ -134,10 +134,8 @@ MousePacket PS2MouseDevice::parse_data_packet(const RawPacket& raw_packet)
     }
 
     packet.is_relative = true;
-#if PS2MOUSE_DEBUG
-    dbgln("PS2 Relative Mouse: Buttons {:x}", packet.buttons);
-    dbgln("Mouse: X {}, Y {}, Z {}", packet.x, packet.y, packet.z);
-#endif
+    dbgln_if(PS2MOUSE_DEBUG, "PS2 Relative Mouse: Buttons {:x}", packet.buttons);
+    dbgln_if(PS2MOUSE_DEBUG, "Mouse: X {}, Y {}, Z {}", packet.x, packet.y, packet.z);
     return packet;
 }
 
diff --git a/Kernel/Devices/USB/UHCIController.cpp b/Kernel/Devices/USB/UHCIController.cpp
index ccaeb14cdf..bcbed565b7 100644
--- a/Kernel/Devices/USB/UHCIController.cpp
+++ b/Kernel/Devices/USB/UHCIController.cpp
@@ -176,9 +176,8 @@ UNMAP_AFTER_INIT void UHCIController::create_structures()
         transfer_descriptor->set_isochronous();
         transfer_descriptor->link_queue_head(m_interrupt_transfer_queue->paddr());
 
-#if UHCI_VERBOSE_DEBUG
-        transfer_descriptor->print();
-#endif
+        if constexpr (UHCI_VERBOSE_DEBUG)
+            transfer_descriptor->print();
     }
 
     m_free_td_pool.resize(MAXIMUM_NUMBER_OF_TDS);
@@ -192,10 +191,10 @@ UNMAP_AFTER_INIT void UHCIController::create_structures()
         // access the raw descriptor (that we later send to the controller)
         m_free_td_pool.at(i) = new (placement_addr) Kernel::USB::TransferDescriptor(paddr);
 
-#if UHCI_VERBOSE_DEBUG
-        auto transfer_descriptor = m_free_td_pool.at(i);
-        transfer_descriptor->print();
-#endif
+        if constexpr (UHCI_VERBOSE_DEBUG) {
+            auto transfer_descriptor = m_free_td_pool.at(i);
+            transfer_descriptor->print();
+        }
     }
 
     if constexpr (UHCI_DEBUG) {
diff --git a/Kernel/Net/TCPSocket.cpp b/Kernel/Net/TCPSocket.cpp
index 1964da40d3..251bbb1f5d 100644
--- a/Kernel/Net/TCPSocket.cpp
+++ b/Kernel/Net/TCPSocket.cpp
@@ -453,9 +453,7 @@ bool TCPSocket::protocol_is_disconnected() const
 void TCPSocket::shut_down_for_writing()
 {
     if (state() == State::Established) {
-#if TCP_SOCKET_DEBUG
-        dbgln(" Sending FIN/ACK from Established and moving into FinWait1");
-#endif
+        dbgln_if(TCP_SOCKET_DEBUG, " Sending FIN/ACK from Established and moving into FinWait1");
         [[maybe_unused]] auto rc = send_tcp_packet(TCPFlags::FIN | TCPFlags::ACK);
         set_state(State::FinWait1);
     } else {
@@ -468,9 +466,7 @@ KResult TCPSocket::close()
     Locker socket_locker(lock());
     auto result = IPv4Socket::close();
     if (state() == State::CloseWait) {
-#if TCP_SOCKET_DEBUG
-        dbgln(" Sending FIN from CloseWait and moving into LastAck");
-#endif
+        dbgln_if(TCP_SOCKET_DEBUG, " Sending FIN from CloseWait and moving into LastAck");
         [[maybe_unused]] auto rc = send_tcp_packet(TCPFlags::FIN | TCPFlags::ACK);
         set_state(State::LastAck);
     }
diff --git a/Kernel/PCI/IOAccess.cpp b/Kernel/PCI/IOAccess.cpp
index d4794c52ce..d2fc93defb 100644
--- a/Kernel/PCI/IOAccess.cpp
+++ b/Kernel/PCI/IOAccess.cpp
@@ -66,9 +66,7 @@ void IOAccess::write32_field(Address address, u32 field, u32 value)
 
 void IOAccess::enumerate_hardware(Function<void(Address, ID)> callback)
 {
-#if PCI_DEBUG
-    dbgln("PCI: IO enumerating hardware");
-#endif
+    dbgln_if(PCI_DEBUG, "PCI: IO enumerating hardware");
     // Single PCI host controller.
     if ((read8_field(Address(), PCI_HEADER_TYPE) & 0x80) == 0) {
         enumerate_bus(-1, 0, callback, true);
diff --git a/Kernel/VM/AnonymousVMObject.cpp b/Kernel/VM/AnonymousVMObject.cpp
index fec628414f..ffb494caa8 100644
--- a/Kernel/VM/AnonymousVMObject.cpp
+++ b/Kernel/VM/AnonymousVMObject.cpp
@@ -443,9 +443,7 @@ PageFaultResponse AnonymousVMObject::handle_cow_fault(size_t page_index, Virtual
     auto& page_slot = physical_pages()[page_index];
     bool have_committed = m_shared_committed_cow_pages && is_nonvolatile(page_index);
     if (page_slot->ref_count() == 1) {
-#if PAGE_FAULT_DEBUG
-        dbgln("    >> It's a COW page but nobody is sharing it anymore. Remap r/w");
-#endif
+        dbgln_if(PAGE_FAULT_DEBUG, "    >> It's a COW page but nobody is sharing it anymore. Remap r/w");
         set_should_cow(page_index, false);
         if (have_committed) {
             if (m_shared_committed_cow_pages->return_one())
@@ -456,14 +454,10 @@ PageFaultResponse AnonymousVMObject::handle_cow_fault(size_t page_index, Virtual
 
     RefPtr<PhysicalPage> page;
     if (have_committed) {
-#if PAGE_FAULT_DEBUG
-        dbgln("    >> It's a committed COW page and it's time to COW!");
-#endif
+        dbgln_if(PAGE_FAULT_DEBUG, "    >> It's a committed COW page and it's time to COW!");
         page = m_shared_committed_cow_pages->allocate_one();
     } else {
-#if PAGE_FAULT_DEBUG
-        dbgln("    >> It's a COW page and it's time to COW!");
-#endif
+        dbgln_if(PAGE_FAULT_DEBUG, "    >> It's a COW page and it's time to COW!");
         page = MM.allocate_user_physical_page(MemoryManager::ShouldZeroFill::No);
         if (page.is_null()) {
             dmesgln("MM: handle_cow_fault was unable to allocate a physical page");
diff --git a/Kernel/VM/Region.cpp b/Kernel/VM/Region.cpp
index 84be9f285d..53e3c6b2bd 100644
--- a/Kernel/VM/Region.cpp
+++ b/Kernel/VM/Region.cpp
@@ -457,9 +457,7 @@ PageFaultResponse Region::handle_zero_fault(size_t page_index_in_region)
     auto page_index_in_vmobject = translate_to_vmobject_page(page_index_in_region);
 
     if (!page_slot.is_null() && !page_slot->is_shared_zero_page() && !page_slot->is_lazy_committed_page()) {
-#if PAGE_FAULT_DEBUG
-        dbgln("MM: zero_page() but page already present. Fine with me!");
-#endif
+        dbgln_if(PAGE_FAULT_DEBUG, "MM: zero_page() but page already present. Fine with me!");
         if (!remap_vmobject_page(page_index_in_vmobject))
             return PageFaultResponse::OutOfMemory;
         return PageFaultResponse::Continue;
diff --git a/Userland/Applications/IRCClient/IRCClient.cpp b/Userland/Applications/IRCClient/IRCClient.cpp
index c71b508521..1413fb071b 100644
--- a/Userland/Applications/IRCClient/IRCClient.cpp
+++ b/Userland/Applications/IRCClient/IRCClient.cpp
@@ -233,16 +233,16 @@ void IRCClient::send_whois(const String& nick)
 
 void IRCClient::handle(const Message& msg)
 {
-#if IRC_DEBUG
-    outln("IRCClient::execute: prefix='{}', command='{}', arguments={}",
-        msg.prefix,
-        msg.command,
-        msg.arguments.size());
-
-    size_t index = 0;
-    for (auto& arg : msg.arguments)
-        outln("    [{}]: {}", index++, arg);
-#endif
+    if constexpr (IRC_DEBUG) {
+        outln("IRCClient::execute: prefix='{}', command='{}', arguments={}",
+            msg.prefix,
+            msg.command,
+            msg.arguments.size());
+
+        size_t index = 0;
+        for (auto& arg : msg.arguments)
+            outln("    [{}]: {}", index++, arg);
+    }
 
     auto numeric = msg.command.to_uint();
 
@@ -464,13 +464,11 @@ void IRCClient::handle_privmsg_or_notice(const Message& msg, PrivmsgOrNotice typ
 
     bool is_ctcp = has_ctcp_payload(msg.arguments[1]);
 
-#if IRC_DEBUG
-    outln("handle_privmsg_or_notice: type='{}'{}, sender_nick='{}', target='{}'",
+    outln_if(IRC_DEBUG, "handle_privmsg_or_notice: type='{}'{}, sender_nick='{}', target='{}'",
         type == PrivmsgOrNotice::Privmsg ? "privmsg" : "notice",
         is_ctcp ? " (ctcp)" : "",
         sender_nick,
         target);
-#endif
 
     if (sender_nick.is_empty())
         return;
diff --git a/Userland/DevTools/HackStudio/CursorTool.cpp b/Userland/DevTools/HackStudio/CursorTool.cpp
index e441660897..bf3b793617 100644
--- a/Userland/DevTools/HackStudio/CursorTool.cpp
+++ b/Userland/DevTools/HackStudio/CursorTool.cpp
@@ -15,9 +15,7 @@ namespace HackStudio {
 
 void CursorTool::on_mousedown(GUI::MouseEvent& event)
 {
-#if CURSOR_TOOL_DEBUG
-    dbgln("CursorTool::on_mousedown");
-#endif
+    dbgln_if(CURSOR_TOOL_DEBUG, "CursorTool::on_mousedown");
     auto& form_widget = m_editor.form_widget();
     auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
 
@@ -52,9 +50,7 @@ void CursorTool::on_mousedown(GUI::MouseEvent& event)
 
 void CursorTool::on_mouseup(GUI::MouseEvent& event)
 {
-#if CURSOR_TOOL_DEBUG
-    dbgln("CursorTool::on_mouseup");
-#endif
+    dbgln_if(CURSOR_TOOL_DEBUG, "CursorTool::on_mouseup");
     if (event.button() == GUI::MouseButton::Left) {
         auto& form_widget = m_editor.form_widget();
         auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
@@ -73,9 +69,7 @@ void CursorTool::on_mouseup(GUI::MouseEvent& event)
 
 void CursorTool::on_mousemove(GUI::MouseEvent& event)
 {
-#if CURSOR_TOOL_DEBUG
-    dbgln("CursorTool::on_mousemove");
-#endif
+    dbgln_if(CURSOR_TOOL_DEBUG, "CursorTool::on_mousemove");
     auto& form_widget = m_editor.form_widget();
 
     if (m_rubber_banding) {
@@ -112,9 +106,7 @@ void CursorTool::on_mousemove(GUI::MouseEvent& event)
 
 void CursorTool::on_keydown(GUI::KeyEvent& event)
 {
-#if CURSOR_TOOL_DEBUG
-    dbgln("CursorTool::on_keydown");
-#endif
+    dbgln_if(CURSOR_TOOL_DEBUG, "CursorTool::on_keydown");
 
     auto move_selected_widgets_by = [this](int x, int y) {
         m_editor.selection().for_each([&](auto& widget) {
diff --git a/Userland/DevTools/HackStudio/Git/DiffViewer.cpp b/Userland/DevTools/HackStudio/Git/DiffViewer.cpp
index ef8af25587..139478c77b 100644
--- a/Userland/DevTools/HackStudio/Git/DiffViewer.cpp
+++ b/Userland/DevTools/HackStudio/Git/DiffViewer.cpp
@@ -140,10 +140,10 @@ void DiffViewer::set_content(const String& original, const String& diff)
     m_original_lines = split_to_lines(original);
     m_hunks = Diff::parse_hunks(diff);
 
-#if DIFF_DEBUG
-    for (size_t i = 0; i < m_original_lines.size(); ++i)
-        dbgln("{}:{}", i, m_original_lines[i]);
-#endif
+    if constexpr (DIFF_DEBUG) {
+        for (size_t i = 0; i < m_original_lines.size(); ++i)
+            dbgln("{}:{}", i, m_original_lines[i]);
+    }
 }
 
 DiffViewer::DiffViewer()
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/LexerAutoComplete.cpp b/Userland/DevTools/HackStudio/LanguageServers/Cpp/LexerAutoComplete.cpp
index 2c0052e7d4..3980f91002 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Cpp/LexerAutoComplete.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Cpp/LexerAutoComplete.cpp
@@ -34,11 +34,11 @@ Vector<GUI::AutocompleteProvider::Entry> LexerAutoComplete::get_suggestions(cons
 
     auto suggestions = identifier_prefixes(lines, tokens, index_of_target_token.value());
 
-#if AUTOCOMPLETE_DEBUG
-    for (auto& suggestion : suggestions) {
-        dbgln("suggestion: {}", suggestion.completion);
+    if constexpr (AUTOCOMPLETE_DEBUG) {
+        for (auto& suggestion : suggestions) {
+            dbgln("suggestion: {}", suggestion.completion);
+        }
     }
-#endif
 
     return suggestions;
 }
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.cpp b/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.cpp
index cb5957e121..2aedb992a1 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.cpp
@@ -49,9 +49,8 @@ OwnPtr<ParserAutoComplete::DocumentData> ParserAutoComplete::create_document_dat
     for (auto& path : document_data->preprocessor().included_paths()) {
         get_or_create_document_data(document_path_from_include_path(path));
     }
-#ifdef CPP_LANGUAGE_SERVER_DEBUG
-    root->dump(0);
-#endif
+    if constexpr (CPP_LANGUAGE_SERVER_DEBUG)
+        root->dump(0);
 
     update_declared_symbols(*document_data);
 
diff --git a/Userland/DevTools/IPCCompiler/main.cpp b/Userland/DevTools/IPCCompiler/main.cpp
index 869f1f48d0..2ce941c425 100644
--- a/Userland/DevTools/IPCCompiler/main.cpp
+++ b/Userland/DevTools/IPCCompiler/main.cpp
@@ -14,6 +14,10 @@
 #include <ctype.h>
 #include <stdio.h>
 
+#ifndef GENERATE_DEBUG_CODE
+#    define GENERATE_DEBUG_CODE 0
+#endif
+
 struct Parameter {
     Vector<String> attributes;
     String type;
@@ -444,22 +448,22 @@ public:
         stream >> message_endpoint_magic;
         if (stream.handle_any_error()) {
 )~~~");
-#if GENERATE_DEBUG_CODE
-        endpoint_generator.append(R"~~~(
-            dbgln("Failed to read message endpoint magic");
+        if constexpr (GENERATE_DEBUG_CODE) {
+            endpoint_generator.append(R"~~~(
+                dbgln("Failed to read message endpoint magic");
 )~~~");
-#endif
+        }
         endpoint_generator.append(R"~~~(
             return {};
         }
 
         if (message_endpoint_magic != @endpoint.magic@) {
 )~~~");
-#if GENERATE_DEBUG_CODE
-        endpoint_generator.append(R"~~~(
-            dbgln("@endpoint.name@: Endpoint magic number message_endpoint_magic != @endpoint.magic@, not my message! (the other endpoint may have handled it)");
+        if constexpr (GENERATE_DEBUG_CODE) {
+            endpoint_generator.append(R"~~~(
+                dbgln("@endpoint.name@: Endpoint magic number message_endpoint_magic != @endpoint.magic@, not my message! (the other endpoint may have handled it)");
 )~~~");
-#endif
+        }
         endpoint_generator.append(R"~~~(
             return {};
         }
@@ -468,11 +472,11 @@ public:
         stream >> message_id;
         if (stream.handle_any_error()) {
 )~~~");
-#if GENERATE_DEBUG_CODE
-        endpoint_generator.append(R"~~~(
-            dbgln("Failed to read message ID");
+        if constexpr (GENERATE_DEBUG_CODE) {
+            endpoint_generator.append(R"~~~(
+                dbgln("Failed to read message ID");
 )~~~");
-#endif
+        }
         endpoint_generator.append(R"~~~(
             return {};
         }
@@ -502,22 +506,22 @@ public:
         endpoint_generator.append(R"~~~(
         default:
 )~~~");
-#if GENERATE_DEBUG_CODE
-        endpoint_generator.append(R"~~~(
-            dbgln("Failed to decode @endpoint.name@.({})", message_id);
+        if constexpr (GENERATE_DEBUG_CODE) {
+            endpoint_generator.append(R"~~~(
+                dbgln("Failed to decode @endpoint.name@.({})", message_id);
 )~~~");
-#endif
+        }
         endpoint_generator.append(R"~~~(
             return {};
         }
 
         if (stream.handle_any_error()) {
 )~~~");
-#if GENERATE_DEBUG_CODE
-        endpoint_generator.append(R"~~~(
-            dbgln("Failed to read the message");
+        if constexpr (GENERATE_DEBUG_CODE) {
+            endpoint_generator.append(R"~~~(
+                dbgln("Failed to read the message");
 )~~~");
-#endif
+        }
         endpoint_generator.append(R"~~~(
             return {};
         }
diff --git a/Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp b/Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp
index 6413941d72..090533b937 100644
--- a/Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp
+++ b/Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp
@@ -31,9 +31,8 @@ namespace UserspaceEmulator {
 
 u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
 {
-#if SPAM_DEBUG
-    reportln("Syscall: {} ({:x})", Syscall::to_string((Syscall::Function)function), function);
-#endif
+    if constexpr (SPAM_DEBUG)
+        reportln("Syscall: {} ({:x})", Syscall::to_string((Syscall::Function)function), function);
     switch (function) {
     case SC_chdir:
         return virt$chdir(arg1, arg2);
diff --git a/Userland/DevTools/UserspaceEmulator/MallocTracer.cpp b/Userland/DevTools/UserspaceEmulator/MallocTracer.cpp
index 483dc282a9..4f00c21c52 100644
--- a/Userland/DevTools/UserspaceEmulator/MallocTracer.cpp
+++ b/Userland/DevTools/UserspaceEmulator/MallocTracer.cpp
@@ -310,9 +310,8 @@ void MallocTracer::populate_memory_graph()
             auto value = m_emulator.mmu().read32({ 0x23, mallocation.address + i * sizeof(u32) });
             auto other_address = value.value();
             if (!value.is_uninitialized() && m_memory_graph.contains(value.value())) {
-#if REACHABLE_DEBUG
-                reportln("region/mallocation {:p} is reachable from other mallocation {:p}", other_address, mallocation.address);
-#endif
+                if constexpr (REACHABLE_DEBUG)
+                    reportln("region/mallocation {:p} is reachable from other mallocation {:p}", other_address, mallocation.address);
                 edges_from_mallocation.edges_from_node.append(other_address);
             }
         }
@@ -339,9 +338,8 @@ void MallocTracer::populate_memory_graph()
             auto value = region.read32(i * sizeof(u32));
             auto other_address = value.value();
             if (!value.is_uninitialized() && m_memory_graph.contains(value.value())) {
-#if REACHABLE_DEBUG
-                reportln("region/mallocation {:p} is reachable from region {:p}-{:p}", other_address, region.base(), region.end() - 1);
-#endif
+                if constexpr (REACHABLE_DEBUG)
+                    reportln("region/mallocation {:p} is reachable from region {:p}-{:p}", other_address, region.base(), region.end() - 1);
                 m_memory_graph.find(other_address)->value.is_reachable = true;
                 reachable_mallocations.append(other_address);
             }
@@ -388,9 +386,8 @@ void MallocTracer::dump_leak_report()
 
     populate_memory_graph();
 
-#if REACHABLE_DEBUG
-    dump_memory_graph();
-#endif
+    if constexpr (REACHABLE_DEBUG)
+        dump_memory_graph();
 
     for_each_mallocation([&](auto& mallocation) {
         if (mallocation.freed)
diff --git a/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp b/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
index f6fcdab9e2..69208e9e20 100644
--- a/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
+++ b/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
@@ -138,18 +138,14 @@ ValueWithShadow<u128> SoftCPU::read_memory128(X86::LogicalAddress address)
 {
     VERIFY(address.selector() == 0x1b || address.selector() == 0x23 || address.selector() == 0x2b);
     auto value = m_emulator.mmu().read128(address);
-#if MEMORY_DEBUG
-    outln("\033[36;1mread_memory128: @{:04x}:{:08x} -> {:032x} ({:032x})\033[0m", address.selector(), address.offset(), value, value.shadow());
-#endif
+    outln_if(MEMORY_DEBUG, "\033[36;1mread_memory128: @{:04x}:{:08x} -> {:032x} ({:032x})\033[0m", address.selector(), address.offset(), value, value.shadow());
     return value;
 }
 ValueWithShadow<u256> SoftCPU::read_memory256(X86::LogicalAddress address)
 {
     VERIFY(address.selector() == 0x1b || address.selector() == 0x23 || address.selector() == 0x2b);
     auto value = m_emulator.mmu().read256(address);
-#if MEMORY_DEBUG
-    outln("\033[36;1mread_memory256: @{:04x}:{:08x} -> {:064x} ({:064x})\033[0m", address.selector(), address.offset(), value, value.shadow());
-#endif
+    outln_if(MEMORY_DEBUG, "\033[36;1mread_memory256: @{:04x}:{:08x} -> {:064x} ({:064x})\033[0m", address.selector(), address.offset(), value, value.shadow());
     return value;
 }
 
@@ -184,18 +180,14 @@ void SoftCPU::write_memory64(X86::LogicalAddress address, ValueWithShadow<u64> v
 void SoftCPU::write_memory128(X86::LogicalAddress address, ValueWithShadow<u128> value)
 {
     VERIFY(address.selector() == 0x23 || address.selector() == 0x2b);
-#if MEMORY_DEBUG
-    outln("\033[36;1mwrite_memory128: @{:04x}:{:08x} <- {:032x} ({:032x})\033[0m", address.selector(), address.offset(), value, value.shadow());
-#endif
+    outln_if(MEMORY_DEBUG, "\033[36;1mwrite_memory128: @{:04x}:{:08x} <- {:032x} ({:032x})\033[0m", address.selector(), address.offset(), value, value.shadow());
     m_emulator.mmu().write128(address, value);
 }
 
 void SoftCPU::write_memory256(X86::LogicalAddress address, ValueWithShadow<u256> value)
 {
     VERIFY(address.selector() == 0x23 || address.selector() == 0x2b);
-#if MEMORY_DEBUG
-    outln("\033[36;1mwrite_memory256: @{:04x}:{:08x} <- {:064x} ({:064x})\033[0m", address.selector(), address.offset(), value, value.shadow());
-#endif
+    outln_if(MEMORY_DEBUG, "\033[36;1mwrite_memory256: @{:04x}:{:08x} <- {:064x} ({:064x})\033[0m", address.selector(), address.offset(), value, value.shadow());
     m_emulator.mmu().write256(address, value);
 }
 
diff --git a/Userland/Libraries/LibAudio/WavLoader.cpp b/Userland/Libraries/LibAudio/WavLoader.cpp
index b300256e42..e4ad0d6a41 100644
--- a/Userland/Libraries/LibAudio/WavLoader.cpp
+++ b/Userland/Libraries/LibAudio/WavLoader.cpp
@@ -54,9 +54,10 @@ bool WavLoaderPlugin::sniff()
 
 RefPtr<Buffer> WavLoaderPlugin::get_more_samples(size_t max_bytes_to_read_from_input)
 {
-#if AWAVLOADER_DEBUG
-    dbgln("Read {} bytes WAV with num_channels {} sample rate {}, bits per sample {}, sample format {}", max_bytes_to_read_from_input, m_num_channels, m_sample_rate, pcm_bits_per_sample(m_sample_format), sample_format_name(m_sample_format));
-#endif
+    dbgln_if(AWAVLOADER_DEBUG, "Read {} bytes WAV with num_channels {} sample rate {}, "
+                               "bits per sample {}, sample format {}",
+        max_bytes_to_read_from_input, m_num_channels,
+        m_sample_rate, pcm_bits_per_sample(m_sample_format), sample_format_name(m_sample_format));
     size_t samples_to_read = static_cast<int>(max_bytes_to_read_from_input) / (m_num_channels * (pcm_bits_per_sample(m_sample_format) / 8));
     RefPtr<Buffer> buffer;
     if (m_file) {
@@ -215,9 +216,8 @@ bool WavLoaderPlugin::parse_header()
         }
     }
 
-#if AWAVLOADER_DEBUG
-    dbgln("WAV format {} at {}bit, {} channels, rate {}Hz ", sample_format_name(m_sample_format), pcm_bits_per_sample(m_sample_format), m_num_channels, m_sample_rate);
-#endif
+    dbgln_if(AWAVLOADER_DEBUG, "WAV format {} at {} bit, {} channels, rate {}Hz ",
+        sample_format_name(m_sample_format), pcm_bits_per_sample(m_sample_format), m_num_channels, m_sample_rate);
 
     // Read chunks until we find DATA
     bool found_data = false;
diff --git a/Userland/Libraries/LibC/termcap.cpp b/Userland/Libraries/LibC/termcap.cpp
index 75789ae62b..30216da2a7 100644
--- a/Userland/Libraries/LibC/termcap.cpp
+++ b/Userland/Libraries/LibC/termcap.cpp
@@ -21,9 +21,8 @@ char* BC;
 
 int tgetent([[maybe_unused]] char* bp, [[maybe_unused]] const char* name)
 {
-#if TERMCAP_DEBUG
-    fprintf(stderr, "tgetent: bp=%p, name='%s'\n", bp, name);
-#endif
+    if constexpr (TERMCAP_DEBUG)
+        fprintf(stderr, "tgetent: bp=%p, name='%s'\n", bp, name);
     PC = '\0';
     BC = const_cast<char*>("\033[D");
     UP = const_cast<char*>("\033[A");
@@ -81,9 +80,8 @@ static void ensure_caps()
 char* tgetstr(const char* id, char** area)
 {
     ensure_caps();
-#if TERMCAP_DEBUG
-    fprintf(stderr, "tgetstr: id='%s'\n", id);
-#endif
+    if constexpr (TERMCAP_DEBUG)
+        fprintf(stderr, "tgetstr: id='%s'\n", id);
     auto it = caps->find(id);
     if (it != caps->end()) {
         char* ret = *area;
@@ -100,9 +98,8 @@ char* tgetstr(const char* id, char** area)
 
 int tgetflag([[maybe_unused]] const char* id)
 {
-#if TERMCAP_DEBUG
-    fprintf(stderr, "tgetflag: '%s'\n", id);
-#endif
+    if constexpr (TERMCAP_DEBUG)
+        fprintf(stderr, "tgetflag: '%s'\n", id);
     auto it = caps->find(id);
     if (it != caps->end())
         return 1;
@@ -111,9 +108,8 @@ int tgetflag([[maybe_unused]] const char* id)
 
 int tgetnum(const char* id)
 {
-#if TERMCAP_DEBUG
-    fprintf(stderr, "tgetnum: '%s'\n", id);
-#endif
+    if constexpr (TERMCAP_DEBUG)
+        fprintf(stderr, "tgetnum: '%s'\n", id);
     auto it = caps->find(id);
     if (it != caps->end())
         return atoi((*it).value);
diff --git a/Userland/Libraries/LibChess/UCIEndpoint.cpp b/Userland/Libraries/LibChess/UCIEndpoint.cpp
index 7b2ee65cfe..e1ab9d234b 100644
--- a/Userland/Libraries/LibChess/UCIEndpoint.cpp
+++ b/Userland/Libraries/LibChess/UCIEndpoint.cpp
@@ -23,9 +23,7 @@ Endpoint::Endpoint(NonnullRefPtr<Core::IODevice> in, NonnullRefPtr<Core::IODevic
 
 void Endpoint::send_command(const Command& command)
 {
-#if UCI_DEBUG
-    dbgln("{} Sent UCI Command: {}", class_name(), String(command.to_string().characters(), Chomp));
-#endif
+    dbgln_if(UCI_DEBUG, "{} Sent UCI Command: {}", class_name(), String(command.to_string().characters(), Chomp));
     m_out->write(command.to_string());
 }
 
@@ -74,9 +72,7 @@ NonnullOwnPtr<Command> Endpoint::read_command()
 {
     String line(ReadonlyBytes(m_in->read_line(4096).bytes()), Chomp);
 
-#if UCI_DEBUG
-    dbgln("{} Received UCI Command: {}", class_name(), line);
-#endif
+    dbgln_if(UCI_DEBUG, "{} Received UCI Command: {}", class_name(), line);
 
     if (line == "uci") {
         return make<UCICommand>(UCICommand::from_string(line));
diff --git a/Userland/Libraries/LibCore/EventLoop.cpp b/Userland/Libraries/LibCore/EventLoop.cpp
index 3fee668783..670a8d0932 100644
--- a/Userland/Libraries/LibCore/EventLoop.cpp
+++ b/Userland/Libraries/LibCore/EventLoop.cpp
@@ -393,9 +393,7 @@ void EventLoop::pump(WaitMode mode)
                 break;
             }
         } else if (event.type() == Event::Type::DeferredInvoke) {
-#if DEFERRED_INVOKE_DEBUG
-            dbgln("DeferredInvoke: receiver = {}", *receiver);
-#endif
+            dbgln_if(DEFERRED_INVOKE_DEBUG, "DeferredInvoke: receiver = {}", *receiver);
             static_cast<DeferredInvocationEvent&>(event).m_invokee(*receiver);
         } else {
             NonnullRefPtr<Object> protector(*receiver);
diff --git a/Userland/Libraries/LibCpp/Parser.cpp b/Userland/Libraries/LibCpp/Parser.cpp
index 34341a61f0..5f055a2e32 100644
--- a/Userland/Libraries/LibCpp/Parser.cpp
+++ b/Userland/Libraries/LibCpp/Parser.cpp
@@ -22,17 +22,17 @@ Parser::Parser(const StringView& program, const String& filename, Preprocessor::
     , m_filename(filename)
 {
     initialize_program_tokens(program);
-#if CPP_DEBUG
-    dbgln("Tokens:");
-    for (auto& token : m_tokens) {
-        StringView text;
-        if (token.start().line != token.end().line || token.start().column > token.end().column)
-            text = {};
-        else
-            text = text_of_token(token);
-        dbgln("{}  {}:{}-{}:{} ({})", token.to_string(), token.start().line, token.start().column, token.end().line, token.end().column, text);
+    if constexpr (CPP_DEBUG) {
+        dbgln("Tokens:");
+        for (auto& token : m_tokens) {
+            StringView text;
+            if (token.start().line != token.end().line || token.start().column > token.end().column)
+                text = {};
+            else
+                text = text_of_token(token);
+            dbgln("{}  {}:{}-{}:{} ({})", token.to_string(), token.start().line, token.start().column, token.end().line, token.end().column, text);
+        }
     }
-#endif
 }
 
 void Parser::initialize_program_tokens(const StringView& program)
diff --git a/Userland/Libraries/LibCrypto/NumberTheory/ModularFunctions.cpp b/Userland/Libraries/LibCrypto/NumberTheory/ModularFunctions.cpp
index 77db745566..71b372fbb0 100644
--- a/Userland/Libraries/LibCrypto/NumberTheory/ModularFunctions.cpp
+++ b/Userland/Libraries/LibCrypto/NumberTheory/ModularFunctions.cpp
@@ -208,9 +208,7 @@ UnsignedBigInteger LCM(const UnsignedBigInteger& a, const UnsignedBigInteger& b)
 
     GCD_without_allocation(a, b, temp_a, temp_b, temp_1, temp_2, temp_3, temp_4, temp_quotient, temp_remainder, gcd_output);
     if (gcd_output == 0) {
-#if NT_DEBUG
-        dbgln("GCD is zero");
-#endif
+        dbgln_if(NT_DEBUG, "GCD is zero");
         return output;
     }
 
diff --git a/Userland/Libraries/LibDebug/DebugInfo.cpp b/Userland/Libraries/LibDebug/DebugInfo.cpp
index 1199999059..2a9568c69d 100644
--- a/Userland/Libraries/LibDebug/DebugInfo.cpp
+++ b/Userland/Libraries/LibDebug/DebugInfo.cpp
@@ -42,15 +42,11 @@ void DebugInfo::parse_scopes_impl(const Dwarf::DIE& die)
             return;
 
         if (child.get_attribute(Dwarf::Attribute::Inline).has_value()) {
-#if SPAM_DEBUG
-            dbgln("DWARF inlined functions are not supported");
-#endif
+            dbgln_if(SPAM_DEBUG, "DWARF inlined functions are not supported");
             return;
         }
         if (child.get_attribute(Dwarf::Attribute::Ranges).has_value()) {
-#if SPAM_DEBUG
-            dbgln("DWARF ranges are not supported");
-#endif
+            dbgln_if(SPAM_DEBUG, "DWARF ranges are not supported");
             return;
         }
         auto name = child.get_attribute(Dwarf::Attribute::Name);
@@ -61,9 +57,7 @@ void DebugInfo::parse_scopes_impl(const Dwarf::DIE& die)
             scope.name = name.value().data.as_string;
 
         if (!child.get_attribute(Dwarf::Attribute::LowPc).has_value()) {
-#if SPAM_DEBUG
-            dbgln("DWARF: Couldn't find attribute LowPc for scope");
-#endif
+            dbgln_if(SPAM_DEBUG, "DWARF: Couldn't find attribute LowPc for scope");
             return;
         }
         scope.address_low = child.get_attribute(Dwarf::Attribute::LowPc).value().data.as_u32;
diff --git a/Userland/Libraries/LibELF/Image.cpp b/Userland/Libraries/LibELF/Image.cpp
index 2f745f927c..2f43a2a788 100644
--- a/Userland/Libraries/LibELF/Image.cpp
+++ b/Userland/Libraries/LibELF/Image.cpp
@@ -263,9 +263,7 @@ Image::RelocationSection Image::Section::relocations() const
     if (relocation_section.type() != SHT_REL)
         return static_cast<const RelocationSection>(m_image.section(0));
 
-#if ELF_IMAGE_DEBUG
-    dbgln("Found relocations for {} in {}", name(), relocation_section.name());
-#endif
+    dbgln_if(ELF_IMAGE_DEBUG, "Found relocations for {} in {}", name(), relocation_section.name());
     return static_cast<const RelocationSection>(relocation_section);
 }
 
diff --git a/Userland/Libraries/LibGUI/Menu.cpp b/Userland/Libraries/LibGUI/Menu.cpp
index 2e0b905c7e..3d774ad385 100644
--- a/Userland/Libraries/LibGUI/Menu.cpp
+++ b/Userland/Libraries/LibGUI/Menu.cpp
@@ -87,9 +87,7 @@ int Menu::realize_menu(RefPtr<Action> default_action)
     unrealize_menu();
     m_menu_id = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateMenu>(m_name)->menu_id();
 
-#if MENU_DEBUG
-    dbgln("GUI::Menu::realize_menu(): New menu ID: {}", m_menu_id);
-#endif
+    dbgln_if(MENU_DEBUG, "GUI::Menu::realize_menu(): New menu ID: {}", m_menu_id);
     VERIFY(m_menu_id > 0);
     for (size_t i = 0; i < m_items.size(); ++i) {
         auto& item = m_items[i];
diff --git a/Userland/Libraries/LibGUI/TextEditor.cpp b/Userland/Libraries/LibGUI/TextEditor.cpp
index 94661e0661..b6ab495466 100644
--- a/Userland/Libraries/LibGUI/TextEditor.cpp
+++ b/Userland/Libraries/LibGUI/TextEditor.cpp
@@ -474,9 +474,8 @@ void TextEditor::paint_event(PaintEvent& event)
         for_each_visual_line(line_index, [&](const Gfx::IntRect& visual_line_rect, auto& visual_line_text, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
             if (is_multi_line() && line_index == m_cursor.line())
                 painter.fill_rect(visual_line_rect, widget_background_color.darkened(0.9f));
-#if TEXTEDITOR_DEBUG
-            painter.draw_rect(visual_line_rect, Color::Cyan);
-#endif
+            if constexpr (TEXTEDITOR_DEBUG)
+                painter.draw_rect(visual_line_rect, Color::Cyan);
 
             if (!placeholder().is_empty() && document().is_empty() && !is_focused() && line_index == 0) {
                 auto line_rect = visual_line_rect;
diff --git a/Userland/Libraries/LibGUI/TreeView.cpp b/Userland/Libraries/LibGUI/TreeView.cpp
index 53019815e2..01e50f089f 100644
--- a/Userland/Libraries/LibGUI/TreeView.cpp
+++ b/Userland/Libraries/LibGUI/TreeView.cpp
@@ -238,9 +238,8 @@ void TreeView::paint_event(PaintEvent& event)
         auto rect = a_rect.translated(0, y_offset);
         auto toggle_rect = a_toggle_rect.translated(0, y_offset);
 
-#if ITEM_RECTS_DEBUG
-        painter.fill_rect(rect, Color::WarmGray);
-#endif
+        if constexpr (ITEM_RECTS_DEBUG)
+            painter.fill_rect(rect, Color::WarmGray);
 
         bool is_selected_row = selection().contains(index);
 
diff --git a/Userland/Libraries/LibGUI/Window.cpp b/Userland/Libraries/LibGUI/Window.cpp
index 87cfcedb3f..442c8ef557 100644
--- a/Userland/Libraries/LibGUI/Window.cpp
+++ b/Userland/Libraries/LibGUI/Window.cpp
@@ -609,9 +609,7 @@ void Window::update(const Gfx::IntRect& a_rect)
 
     for (auto& pending_rect : m_pending_paint_event_rects) {
         if (pending_rect.contains(a_rect)) {
-#if UPDATE_COALESCING_DEBUG
-            dbgln("Ignoring {} since it's contained by pending rect {}", a_rect, pending_rect);
-#endif
+            dbgln_if(UPDATE_COALESCING_DEBUG, "Ignoring {} since it's contained by pending rect {}", a_rect, pending_rect);
             return;
         }
     }
diff --git a/Userland/Libraries/LibGemini/GeminiJob.cpp b/Userland/Libraries/LibGemini/GeminiJob.cpp
index 306594b003..003fb9310b 100644
--- a/Userland/Libraries/LibGemini/GeminiJob.cpp
+++ b/Userland/Libraries/LibGemini/GeminiJob.cpp
@@ -20,9 +20,7 @@ void GeminiJob::start()
     m_socket = TLS::TLSv12::construct(this);
     m_socket->set_root_certificates(m_override_ca_certificates ? *m_override_ca_certificates : DefaultRootCACertificates::the().certificates());
     m_socket->on_tls_connected = [this] {
-#if GEMINIJOB_DEBUG
-        dbgln("GeminiJob: on_connected callback");
-#endif
+        dbgln_if(GEMINIJOB_DEBUG, "GeminiJob: on_connected callback");
         on_socket_connected();
     };
     m_socket->on_tls_error = [this](TLS::AlertDescription error) {
diff --git a/Userland/Libraries/LibGemini/Job.cpp b/Userland/Libraries/LibGemini/Job.cpp
index 518883dd25..e7c2f20eca 100644
--- a/Userland/Libraries/LibGemini/Job.cpp
+++ b/Userland/Libraries/LibGemini/Job.cpp
@@ -132,9 +132,7 @@ void Job::on_socket_connected()
         });
 
         if (!is_established()) {
-#if JOB_DEBUG
-            dbgln("Connection appears to have closed, finishing up");
-#endif
+            dbgln_if(JOB_DEBUG, "Connection appears to have closed, finishing up");
             finish_up();
         }
     });
diff --git a/Userland/Libraries/LibGfx/GIFLoader.cpp b/Userland/Libraries/LibGfx/GIFLoader.cpp
index 2948ea736b..d8b60c0dbb 100644
--- a/Userland/Libraries/LibGfx/GIFLoader.cpp
+++ b/Userland/Libraries/LibGfx/GIFLoader.cpp
@@ -350,9 +350,7 @@ static bool decode_frame(GIFLoadingContext& context, size_t frame_index)
         while (true) {
             Optional<u16> code = decoder.next_code();
             if (!code.has_value()) {
-#if GIF_DEBUG
-                dbgln("Unexpectedly reached end of gif frame data");
-#endif
+                dbgln_if(GIF_DEBUG, "Unexpectedly reached end of gif frame data");
                 return false;
             }
 
@@ -499,9 +497,7 @@ static bool load_gif_frame_descriptors(GIFLoadingContext& context)
 
             if (extension_type == 0xF9) {
                 if (sub_block.size() != 4) {
-#if GIF_DEBUG
-                    dbgln("Unexpected graphic control size");
-#endif
+                    dbgln_if(GIF_DEBUG, "Unexpected graphic control size");
                     continue;
                 }
 
diff --git a/Userland/Libraries/LibGfx/ICOLoader.cpp b/Userland/Libraries/LibGfx/ICOLoader.cpp
index c6e5c99557..2c8755aeb0 100644
--- a/Userland/Libraries/LibGfx/ICOLoader.cpp
+++ b/Userland/Libraries/LibGfx/ICOLoader.cpp
@@ -169,25 +169,22 @@ static bool load_ico_directory(ICOLoadingContext& context)
     for (size_t i = 0; i < image_count.value(); ++i) {
         auto maybe_desc = decode_ico_direntry(stream);
         if (!maybe_desc.has_value()) {
-#if ICO_DEBUG
-            printf("load_ico_directory: error loading entry: %lu\n", i);
-#endif
+            if constexpr (ICO_DEBUG)
+                printf("load_ico_directory: error loading entry: %lu\n", i);
             return false;
         }
 
         auto& desc = maybe_desc.value();
         if (desc.offset + desc.size < desc.offset // detect integer overflow
             || (desc.offset + desc.size) > context.data_size) {
-#if ICO_DEBUG
-            printf("load_ico_directory: offset: %lu size: %lu doesn't fit in ICO size: %lu\n",
-                desc.offset, desc.size, context.data_size);
-#endif
+            if constexpr (ICO_DEBUG)
+                printf("load_ico_directory: offset: %lu size: %lu doesn't fit in ICO size: %lu\n",
+                    desc.offset, desc.size, context.data_size);
             return false;
         }
-#if ICO_DEBUG
-        printf("load_ico_directory: index %zu width: %u height: %u offset: %lu size: %lu\n",
-            i, desc.width, desc.height, desc.offset, desc.size);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_directory: index %zu width: %u height: %u offset: %lu size: %lu\n",
+                i, desc.width, desc.height, desc.offset, desc.size);
         context.images.append(desc);
     }
     context.largest_index = find_largest_image(context);
@@ -203,16 +200,14 @@ static bool load_ico_bmp(ICOLoadingContext& context, ImageDescriptor& desc)
 
     memcpy(&info, context.data + desc.offset, sizeof(info));
     if (info.size != sizeof(info)) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: info size: %u, expected: %lu\n", info.size, sizeof(info));
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: info size: %u, expected: %lu\n", info.size, sizeof(info));
         return false;
     }
 
     if (info.width < 0) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: width %d < 0\n", info.width);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: width %d < 0\n", info.width);
         return false;
     }
     bool topdown = false;
@@ -222,37 +217,32 @@ static bool load_ico_bmp(ICOLoadingContext& context, ImageDescriptor& desc)
     }
 
     if (info.planes != 1) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: planes: %d != 1", info.planes);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: planes: %d != 1", info.planes);
         return false;
     }
 
     if (info.bpp != 32) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: unsupported bpp: %u\n", info.bpp);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: unsupported bpp: %u\n", info.bpp);
         return false;
     }
 
-#if ICO_DEBUG
-    printf("load_ico_bmp: width: %d height: %d direction: %s bpp: %d size_image: %u\n",
-        info.width, info.height, topdown ? "TopDown" : "BottomUp", info.bpp, info.size_image);
-#endif
+    if constexpr (ICO_DEBUG)
+        printf("load_ico_bmp: width: %d height: %d direction: %s bpp: %d size_image: %u\n",
+            info.width, info.height, topdown ? "TopDown" : "BottomUp", info.bpp, info.size_image);
 
     if (info.compression != 0 || info.palette_size != 0 || info.important_colors != 0) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: following fields must be 0: compression: %u palette_size: %u important_colors: %u\n",
-            info.compression, info.palette_size, info.important_colors);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: following fields must be 0: compression: %u palette_size: %u important_colors: %u\n",
+                info.compression, info.palette_size, info.important_colors);
         return false;
     }
 
     if (info.width != desc.width || info.height != 2 * desc.height) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: size mismatch: ico %dx%d, bmp %dx%d\n",
-            desc.width, desc.height, info.width, info.height);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: size mismatch: ico %dx%d, bmp %dx%d\n",
+                desc.width, desc.height, info.width, info.height);
         return false;
     }
 
@@ -261,10 +251,9 @@ static bool load_ico_bmp(ICOLoadingContext& context, ImageDescriptor& desc)
     size_t required_len = desc.height * (desc.width * sizeof(BMP_ARGB) + mask_row_len);
     size_t available_len = desc.size - sizeof(info);
     if (required_len > available_len) {
-#if ICO_DEBUG
-        printf("load_ico_bmp: required_len: %lu > available_len: %lu\n",
-            required_len, available_len);
-#endif
+        if constexpr (ICO_DEBUG)
+            printf("load_ico_bmp: required_len: %lu > available_len: %lu\n",
+                required_len, available_len);
         return false;
     }
 
@@ -310,17 +299,15 @@ static bool load_ico_bitmap(ICOLoadingContext& context, Optional<size_t> index)
     if (png_decoder.sniff()) {
         desc.bitmap = png_decoder.bitmap();
         if (!desc.bitmap) {
-#if ICO_DEBUG
-            printf("load_ico_bitmap: failed to load PNG encoded image index: %lu\n", real_index);
-#endif
+            if constexpr (ICO_DEBUG)
+                printf("load_ico_bitmap: failed to load PNG encoded image index: %lu\n", real_index);
             return false;
         }
         return true;
     } else {
         if (!load_ico_bmp(context, desc)) {
-#if ICO_DEBUG
-            printf("load_ico_bitmap: failed to load BMP encoded image index: %lu\n", real_index);
-#endif
+            if constexpr (ICO_DEBUG)
+                printf("load_ico_bitmap: failed to load BMP encoded image index: %lu\n", real_index);
             return false;
         }
         return true;
diff --git a/Userland/Libraries/LibGfx/JPGLoader.cpp b/Userland/Libraries/LibGfx/JPGLoader.cpp
index b6115379b0..1c2aefc209 100644
--- a/Userland/Libraries/LibGfx/JPGLoader.cpp
+++ b/Userland/Libraries/LibGfx/JPGLoader.cpp
@@ -247,9 +247,7 @@ static Optional<u8> get_next_symbol(HuffmanStreamState& hstream, const HuffmanTa
         }
     }
 
-#if JPG_DEBUG
-    dbgln("If you're seeing this...the jpeg decoder needs to support more kinds of JPEGs!");
-#endif
+    dbgln_if(JPG_DEBUG, "If you're seeing this...the jpeg decoder needs to support more kinds of JPEGs!");
     return {};
 }
 
diff --git a/Userland/Libraries/LibGfx/Painter.cpp b/Userland/Libraries/LibGfx/Painter.cpp
index 80a5456cdb..d98e8a45f1 100644
--- a/Userland/Libraries/LibGfx/Painter.cpp
+++ b/Userland/Libraries/LibGfx/Painter.cpp
@@ -1880,11 +1880,11 @@ void Painter::fill_path(Path& path, Color color, WindingRule winding_rule)
             quick_sort(active_list, [](const auto& line0, const auto& line1) {
                 return line1.x < line0.x;
             });
-#if FILL_PATH_DEBUG
-            if ((int)scanline % 10 == 0) {
-                draw_text(IntRect(active_list.last().x - 20, scanline, 20, 10), String::number((int)scanline));
+            if constexpr (FILL_PATH_DEBUG) {
+                if ((int)scanline % 10 == 0) {
+                    draw_text(IntRect(active_list.last().x - 20, scanline, 20, 10), String::number((int)scanline));
+                }
             }
-#endif
 
             if (active_list.size() > 1) {
                 auto winding_number { winding_rule == WindingRule::Nonzero ? 1 : 0 };
@@ -1952,12 +1952,12 @@ void Painter::fill_path(Path& path, Color color, WindingRule winding_rule)
         }
     }
 
-#if FILL_PATH_DEBUG
-    size_t i { 0 };
-    for (auto& segment : segments) {
-        draw_line(Point<int>(segment.from), Point<int>(segment.to), Color::from_hsv(i++ * 360.0 / segments.size(), 1.0, 1.0), 1);
+    if constexpr (FILL_PATH_DEBUG) {
+        size_t i { 0 };
+        for (auto& segment : segments) {
+            draw_line(Point<int>(segment.from), Point<int>(segment.to), Color::from_hsv(i++ * 360.0 / segments.size(), 1.0, 1.0), 1);
+        }
     }
-#endif
 }
 
 void Painter::blit_disabled(const IntPoint& location, const Gfx::Bitmap& bitmap, const IntRect& rect, const Palette& palette)
diff --git a/Userland/Libraries/LibHTTP/HttpJob.cpp b/Userland/Libraries/LibHTTP/HttpJob.cpp
index 96001bb0bc..d8c480c09a 100644
--- a/Userland/Libraries/LibHTTP/HttpJob.cpp
+++ b/Userland/Libraries/LibHTTP/HttpJob.cpp
@@ -17,9 +17,7 @@ void HttpJob::start()
     VERIFY(!m_socket);
     m_socket = Core::TCPSocket::construct(this);
     m_socket->on_connected = [this] {
-#if CHTTPJOB_DEBUG
-        dbgln("HttpJob: on_connected callback");
-#endif
+        dbgln_if(CHTTPJOB_DEBUG, "HttpJob: on_connected callback");
         on_socket_connected();
     };
     bool success = m_socket->connect(m_request.url().host(), m_request.url().port());
diff --git a/Userland/Libraries/LibHTTP/HttpsJob.cpp b/Userland/Libraries/LibHTTP/HttpsJob.cpp
index 4763b9cc89..18b6cb9974 100644
--- a/Userland/Libraries/LibHTTP/HttpsJob.cpp
+++ b/Userland/Libraries/LibHTTP/HttpsJob.cpp
@@ -20,9 +20,7 @@ void HttpsJob::start()
     m_socket = TLS::TLSv12::construct(this);
     m_socket->set_root_certificates(m_override_ca_certificates ? *m_override_ca_certificates : DefaultRootCACertificates::the().certificates());
     m_socket->on_tls_connected = [this] {
-#if HTTPSJOB_DEBUG
-        dbgln("HttpsJob: on_connected callback");
-#endif
+        dbgln_if(HTTPSJOB_DEBUG, "HttpsJob: on_connected callback");
         on_socket_connected();
     };
     m_socket->on_tls_error = [&](TLS::AlertDescription error) {
diff --git a/Userland/Libraries/LibHTTP/Job.cpp b/Userland/Libraries/LibHTTP/Job.cpp
index 92a8cc8449..8b67de60a1 100644
--- a/Userland/Libraries/LibHTTP/Job.cpp
+++ b/Userland/Libraries/LibHTTP/Job.cpp
@@ -346,9 +346,7 @@ void Job::on_socket_connected()
         });
 
         if (!is_established()) {
-#if JOB_DEBUG
-            dbgln("Connection appears to have closed, finishing up");
-#endif
+            dbgln_if(JOB_DEBUG, "Connection appears to have closed, finishing up");
             finish_up();
         }
     });
diff --git a/Userland/Libraries/LibLine/KeyCallbackMachine.cpp b/Userland/Libraries/LibLine/KeyCallbackMachine.cpp
index faab56207d..9e6020a015 100644
--- a/Userland/Libraries/LibLine/KeyCallbackMachine.cpp
+++ b/Userland/Libraries/LibLine/KeyCallbackMachine.cpp
@@ -20,9 +20,7 @@ void KeyCallbackMachine::register_key_input_callback(Vector<Key> keys, Function<
 
 void KeyCallbackMachine::key_pressed(Editor& editor, Key key)
 {
-#if CALLBACK_MACHINE_DEBUG
-    dbgln("Key<{}, {}> pressed, seq_length={}, {} things in the matching vector", key.key, key.modifiers, m_sequence_length, m_current_matching_keys.size());
-#endif
+    dbgln_if(CALLBACK_MACHINE_DEBUG, "Key<{}, {}> pressed, seq_length={}, {} things in the matching vector", key.key, key.modifiers, m_sequence_length, m_current_matching_keys.size());
     if (m_sequence_length == 0) {
         VERIFY(m_current_matching_keys.is_empty());
 
@@ -61,14 +59,14 @@ void KeyCallbackMachine::key_pressed(Editor& editor, Key key)
         return;
     }
 
-#if CALLBACK_MACHINE_DEBUG
-    dbgln("seq_length={}, matching vector:", m_sequence_length);
-    for (auto& key : m_current_matching_keys) {
-        for (auto& k : key)
-            dbgln("    {}, {}", k.key, k.modifiers);
-        dbgln("");
+    if constexpr (CALLBACK_MACHINE_DEBUG) {
+        dbgln("seq_length={}, matching vector:", m_sequence_length);
+        for (auto& key : m_current_matching_keys) {
+            for (auto& k : key)
+                dbgln("    {}, {}", k.key, k.modifiers);
+            dbgln("");
+        }
     }
-#endif
 
     m_should_process_this_key = false;
     for (auto& key : m_current_matching_keys) {
diff --git a/Userland/Libraries/LibMarkdown/Text.cpp b/Userland/Libraries/LibMarkdown/Text.cpp
index c93f501be3..7d363e8ab7 100644
--- a/Userland/Libraries/LibMarkdown/Text.cpp
+++ b/Userland/Libraries/LibMarkdown/Text.cpp
@@ -222,17 +222,15 @@ Optional<Text> Text::parse(const StringView& str)
             current_link_is_actually_img = true;
             break;
         case '[':
-#if MARKDOWN_DEBUG
-            if (first_span_in_the_current_link != -1)
-                dbgln("Dropping the outer link");
-#endif
+            if constexpr (MARKDOWN_DEBUG) {
+                if (first_span_in_the_current_link != -1)
+                    dbgln("Dropping the outer link");
+            }
             first_span_in_the_current_link = spans.size();
             break;
         case ']': {
             if (first_span_in_the_current_link == -1) {
-#if MARKDOWN_DEBUG
-                dbgln("Unmatched ]");
-#endif
+                dbgln_if(MARKDOWN_DEBUG, "Unmatched ]");
                 continue;
             }
             ScopeGuard guard = [&] {
diff --git a/Userland/Libraries/LibRegex/RegexDebug.h b/Userland/Libraries/LibRegex/RegexDebug.h
index 690e81391f..eb45ba55bf 100644
--- a/Userland/Libraries/LibRegex/RegexDebug.h
+++ b/Userland/Libraries/LibRegex/RegexDebug.h
@@ -10,8 +10,6 @@
 #include "LibRegex/RegexMatcher.h"
 #include <AK/Debug.h>
 
-#if REGEX_DEBUG
-
 namespace regex {
 
 class RegexDebug {
@@ -131,5 +129,3 @@ private:
 }
 
 using regex::RegexDebug;
-
-#endif
diff --git a/Userland/Libraries/LibRegex/RegexLexer.cpp b/Userland/Libraries/LibRegex/RegexLexer.cpp
index 8065178fa1..bd7ac684f6 100644
--- a/Userland/Libraries/LibRegex/RegexLexer.cpp
+++ b/Userland/Libraries/LibRegex/RegexLexer.cpp
@@ -130,9 +130,8 @@ Token Lexer::next()
         case '\\':
             return 2;
         default:
-#if REGEX_DEBUG
-            fprintf(stderr, "[LEXER] Found invalid escape sequence: \\%c (the parser will have to deal with this!)\n", peek(1));
-#endif
+            if constexpr (REGEX_DEBUG)
+                fprintf(stderr, "[LEXER] Found invalid escape sequence: \\%c (the parser will have to deal with this!)\n", peek(1));
             return 0;
         }
     };
diff --git a/Userland/Libraries/LibRegex/RegexParser.cpp b/Userland/Libraries/LibRegex/RegexParser.cpp
index 7a0a172d52..decbb8bbb1 100644
--- a/Userland/Libraries/LibRegex/RegexParser.cpp
+++ b/Userland/Libraries/LibRegex/RegexParser.cpp
@@ -148,9 +148,8 @@ Parser::Result Parser::parse(Optional<AllOptions> regex_options)
     else
         set_error(Error::InvalidPattern);
 
-#if REGEX_DEBUG
-    fprintf(stderr, "[PARSER] Produced bytecode with %lu entries (opcodes + arguments)\n", m_parser_state.bytecode.size());
-#endif
+    if constexpr (REGEX_DEBUG)
+        fprintf(stderr, "[PARSER] Produced bytecode with %lu entries (opcodes + arguments)\n", m_parser_state.bytecode.size());
     return {
         move(m_parser_state.bytecode),
         move(m_parser_state.capture_groups_count),
@@ -461,9 +460,8 @@ ALWAYS_INLINE bool PosixExtendedParser::parse_sub_expression(ByteCode& stack, si
         if (match(TokenType::EscapeSequence)) {
             length = 1;
             Token t = consume();
-#if REGEX_DEBUG
-            printf("[PARSER] EscapeSequence with substring %s\n", String(t.value()).characters());
-#endif
+            if constexpr (REGEX_DEBUG)
+                printf("[PARSER] EscapeSequence with substring %s\n", String(t.value()).characters());
 
             bytecode.insert_bytecode_compare_values({ { CharacterCompareType::Char, (u32)t.value().characters_without_null_termination()[1] } });
             should_parse_repetition_symbol = true;
diff --git a/Userland/Libraries/LibRegex/Tests/Regex.cpp b/Userland/Libraries/LibRegex/Tests/Regex.cpp
index 054c54485b..b1d8ab9943 100644
--- a/Userland/Libraries/LibRegex/Tests/Regex.cpp
+++ b/Userland/Libraries/LibRegex/Tests/Regex.cpp
@@ -356,21 +356,21 @@ TEST_CASE(ini_file_entries)
     Regex<PosixExtended> re("[[:alpha:]]*=([[:digit:]]*)|\\[(.*)\\]");
     RegexResult result;
 
-#if REGEX_DEBUG
-    RegexDebug regex_dbg(stderr);
-    regex_dbg.print_raw_bytecode(re);
-    regex_dbg.print_header();
-    regex_dbg.print_bytecode(re);
-#endif
+    if constexpr (REGEX_DEBUG) {
+        RegexDebug regex_dbg(stderr);
+        regex_dbg.print_raw_bytecode(re);
+        regex_dbg.print_header();
+        regex_dbg.print_bytecode(re);
+    }
 
     String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
     EXPECT_EQ(re.search(haystack.view(), result, PosixFlags::Multiline), true);
     EXPECT_EQ(result.count, 3u);
 
-#if REGEX_DEBUG
-    for (auto& v : result.matches)
-        fprintf(stderr, "%s\n", v.view.to_string().characters());
-#endif
+    if constexpr (REGEX_DEBUG) {
+        for (auto& v : result.matches)
+            fprintf(stderr, "%s\n", v.view.to_string().characters());
+    }
 
     EXPECT_EQ(result.matches.at(0).view, "[Window]");
     EXPECT_EQ(result.capture_group_matches.at(0).at(0).view, "Window");
@@ -405,12 +405,12 @@ TEST_CASE(named_capture_group)
     Regex<PosixExtended> re("[[:alpha:]]*=(?<Test>[[:digit:]]*)");
     RegexResult result;
 
-#if REGEX_DEBUG
-    RegexDebug regex_dbg(stderr);
-    regex_dbg.print_raw_bytecode(re);
-    regex_dbg.print_header();
-    regex_dbg.print_bytecode(re);
-#endif
+    if constexpr (REGEX_DEBUG) {
+        RegexDebug regex_dbg(stderr);
+        regex_dbg.print_raw_bytecode(re);
+        regex_dbg.print_header();
+        regex_dbg.print_bytecode(re);
+    }
 
     String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
     EXPECT_EQ(re.search(haystack, result, PosixFlags::Multiline), true);
@@ -426,12 +426,12 @@ TEST_CASE(a_star)
     Regex<PosixExtended> re("a*");
     RegexResult result;
 
-#if REGEX_DEBUG
-    RegexDebug regex_dbg(stderr);
-    regex_dbg.print_raw_bytecode(re);
-    regex_dbg.print_header();
-    regex_dbg.print_bytecode(re);
-#endif
+    if constexpr (REGEX_DEBUG) {
+        RegexDebug regex_dbg(stderr);
+        regex_dbg.print_raw_bytecode(re);
+        regex_dbg.print_header();
+        regex_dbg.print_bytecode(re);
+    }
 
     String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
     EXPECT_EQ(re.search(haystack.view(), result, PosixFlags::Multiline), true);
@@ -488,14 +488,14 @@ TEST_CASE(ECMA262_parse)
     for (auto& test : tests) {
         Regex<ECMA262> re(test.pattern);
         EXPECT_EQ(re.parser_result.error, test.expected_error);
-#if REGEX_DEBUG
-        dbgln("\n");
-        RegexDebug regex_dbg(stderr);
-        regex_dbg.print_raw_bytecode(re);
-        regex_dbg.print_header();
-        regex_dbg.print_bytecode(re);
-        dbgln("\n");
-#endif
+        if constexpr (REGEX_DEBUG) {
+            dbgln("\n");
+            RegexDebug regex_dbg(stderr);
+            regex_dbg.print_raw_bytecode(re);
+            regex_dbg.print_header();
+            regex_dbg.print_bytecode(re);
+            dbgln("\n");
+        }
     }
 }
 
@@ -550,14 +550,14 @@ TEST_CASE(ECMA262_match)
 
     for (auto& test : tests) {
         Regex<ECMA262> re(test.pattern, test.options);
-#if REGEX_DEBUG
-        dbgln("\n");
-        RegexDebug regex_dbg(stderr);
-        regex_dbg.print_raw_bytecode(re);
-        regex_dbg.print_header();
-        regex_dbg.print_bytecode(re);
-        dbgln("\n");
-#endif
+        if constexpr (REGEX_DEBUG) {
+            dbgln("\n");
+            RegexDebug regex_dbg(stderr);
+            regex_dbg.print_raw_bytecode(re);
+            regex_dbg.print_header();
+            regex_dbg.print_bytecode(re);
+            dbgln("\n");
+        }
         EXPECT_EQ(re.parser_result.error, Error::NoError);
         EXPECT_EQ(re.match(test.subject).success, test.matches);
     }
@@ -583,14 +583,14 @@ TEST_CASE(replace)
 
     for (auto& test : tests) {
         Regex<ECMA262> re(test.pattern, test.options);
-#if REGEX_DEBUG
-        dbgln("\n");
-        RegexDebug regex_dbg(stderr);
-        regex_dbg.print_raw_bytecode(re);
-        regex_dbg.print_header();
-        regex_dbg.print_bytecode(re);
-        dbgln("\n");
-#endif
+        if constexpr (REGEX_DEBUG) {
+            dbgln("\n");
+            RegexDebug regex_dbg(stderr);
+            regex_dbg.print_raw_bytecode(re);
+            regex_dbg.print_header();
+            regex_dbg.print_bytecode(re);
+            dbgln("\n");
+        }
         EXPECT_EQ(re.parser_result.error, Error::NoError);
         EXPECT_EQ(re.replace(test.subject, test.replacement), test.expected);
     }
diff --git a/Userland/Libraries/LibTLS/ClientHandshake.cpp b/Userland/Libraries/LibTLS/ClientHandshake.cpp
index e1c54093b3..8fd60ef2cc 100644
--- a/Userland/Libraries/LibTLS/ClientHandshake.cpp
+++ b/Userland/Libraries/LibTLS/ClientHandshake.cpp
@@ -71,10 +71,10 @@ ssize_t TLSv12::handle_hello(ReadonlyBytes buffer, WritePacketStage& write_packe
     if (session_length && session_length <= 32) {
         memcpy(m_context.session_id, buffer.offset_pointer(res), session_length);
         m_context.session_id_size = session_length;
-#if TLS_DEBUG
-        dbgln("Remote session ID:");
-        print_buffer(ReadonlyBytes { m_context.session_id, session_length });
-#endif
+        if constexpr (TLS_DEBUG) {
+            dbgln("Remote session ID:");
+            print_buffer(ReadonlyBytes { m_context.session_id, session_length });
+        }
     } else {
         m_context.session_id_size = 0;
     }
@@ -268,10 +268,10 @@ void TLSv12::build_random(PacketBuilder& builder)
     }
 
     auto& certificate = m_context.certificates[certificate_option.value()];
-#if TLS_DEBUG
-    dbgln("PreMaster secret");
-    print_buffer(m_context.premaster_key);
-#endif
+    if constexpr (TLS_DEBUG) {
+        dbgln("PreMaster secret");
+        print_buffer(m_context.premaster_key);
+    }
 
     Crypto::PK::RSA_PKCS1_EME rsa(certificate.public_key.modulus(), 0, certificate.public_key.public_exponent());
 
@@ -279,10 +279,10 @@ void TLSv12::build_random(PacketBuilder& builder)
     auto outbuf = Bytes { out, rsa.output_size() };
     rsa.encrypt(m_context.premaster_key, outbuf);
 
-#if TLS_DEBUG
-    dbgln("Encrypted: ");
-    print_buffer(outbuf);
-#endif
+    if constexpr (TLS_DEBUG) {
+        dbgln("Encrypted: ");
+        print_buffer(outbuf);
+    }
 
     if (!compute_master_secret(bytes)) {
         dbgln("oh noes we could not derive a master key :(");
diff --git a/Userland/Libraries/LibTLS/Exchange.cpp b/Userland/Libraries/LibTLS/Exchange.cpp
index c291fbdcaf..45e52e2bc2 100644
--- a/Userland/Libraries/LibTLS/Exchange.cpp
+++ b/Userland/Libraries/LibTLS/Exchange.cpp
@@ -53,22 +53,22 @@ bool TLSv12::expand_key()
     auto server_iv = key + offset;
     offset += iv_size;
 
-#if TLS_DEBUG
-    dbgln("client key");
-    print_buffer(client_key, key_size);
-    dbgln("server key");
-    print_buffer(server_key, key_size);
-    dbgln("client iv");
-    print_buffer(client_iv, iv_size);
-    dbgln("server iv");
-    print_buffer(server_iv, iv_size);
-    if (!is_aead) {
-        dbgln("client mac key");
-        print_buffer(m_context.crypto.local_mac, mac_size);
-        dbgln("server mac key");
-        print_buffer(m_context.crypto.remote_mac, mac_size);
+    if constexpr (TLS_DEBUG) {
+        dbgln("client key");
+        print_buffer(client_key, key_size);
+        dbgln("server key");
+        print_buffer(server_key, key_size);
+        dbgln("client iv");
+        print_buffer(client_iv, iv_size);
+        dbgln("server iv");
+        print_buffer(server_iv, iv_size);
+        if (!is_aead) {
+            dbgln("client mac key");
+            print_buffer(m_context.crypto.local_mac, mac_size);
+            dbgln("server mac key");
+            print_buffer(m_context.crypto.remote_mac, mac_size);
+        }
     }
-#endif
 
     if (is_aead) {
         memcpy(m_context.crypto.local_aead_iv, client_iv, iv_size);
@@ -153,10 +153,10 @@ bool TLSv12::compute_master_secret(size_t length)
         ReadonlyBytes { m_context.remote_random, sizeof(m_context.remote_random) });
 
     m_context.premaster_key.clear();
-#if TLS_DEBUG
-    dbgln("master key:");
-    print_buffer(m_context.master_key);
-#endif
+    if constexpr (TLS_DEBUG) {
+        dbgln("master key:");
+        print_buffer(m_context.master_key);
+    }
     expand_key();
     return true;
 }
@@ -195,9 +195,7 @@ ByteBuffer TLSv12::build_certificate()
     builder.append((u8)HandshakeType::CertificateMessage);
 
     if (!total_certificate_size) {
-#if TLS_DEBUG
-        dbgln("No certificates, sending empty certificate message");
-#endif
+        dbgln_if(TLS_DEBUG, "No certificates, sending empty certificate message");
         builder.append_u24(certificate_vector_header_size);
         builder.append_u24(total_certificate_size);
     } else {
diff --git a/Userland/Libraries/LibTLS/Socket.cpp b/Userland/Libraries/LibTLS/Socket.cpp
index fc4ccf9208..92c7afe1e4 100644
--- a/Userland/Libraries/LibTLS/Socket.cpp
+++ b/Userland/Libraries/LibTLS/Socket.cpp
@@ -57,9 +57,7 @@ String TLSv12::read_line(size_t max_size)
 bool TLSv12::write(ReadonlyBytes buffer)
 {
     if (m_context.connection_status != ConnectionStatus::Established) {
-#if TLS_DEBUG
-        dbgln("write request while not connected");
-#endif
+        dbgln_if(TLS_DEBUG, "write request while not connected");
         return false;
     }
 
@@ -186,9 +184,7 @@ bool TLSv12::check_connection_state(bool read)
 {
     if (!Core::Socket::is_open() || !Core::Socket::is_connected() || Core::Socket::eof()) {
         // an abrupt closure (the server is a jerk)
-#if TLS_DEBUG
-        dbgln("Socket not open, assuming abrupt closure");
-#endif
+        dbgln_if(TLS_DEBUG, "Socket not open, assuming abrupt closure");
         m_context.connection_finished = true;
     }
     if (m_context.critical_error) {
@@ -209,9 +205,7 @@ bool TLSv12::check_connection_state(bool read)
                 m_context.application_buffer.size());
         } else {
             m_context.connection_finished = false;
-#if TLS_DEBUG
-            dbgln("FINISHED");
-#endif
+            dbgln_if(TLS_DEBUG, "FINISHED");
         }
         if (!m_context.application_buffer.size()) {
             m_context.connection_status = ConnectionStatus::Disconnected;
@@ -230,10 +224,10 @@ bool TLSv12::flush()
     if (out_buffer_length == 0)
         return true;
 
-#if TLS_DEBUG
-    dbgln("SENDING...");
-    print_buffer(out_buffer, out_buffer_length);
-#endif
+    if constexpr (TLS_DEBUG) {
+        dbgln("SENDING...");
+        print_buffer(out_buffer, out_buffer_length);
+    }
     if (Core::Socket::write(&out_buffer[out_buffer_index], out_buffer_length)) {
         write_buffer().clear();
         return true;
diff --git a/Userland/Libraries/LibTLS/TLSv12.cpp b/Userland/Libraries/LibTLS/TLSv12.cpp
index 4d259dd1c0..671b172a4e 100644
--- a/Userland/Libraries/LibTLS/TLSv12.cpp
+++ b/Userland/Libraries/LibTLS/TLSv12.cpp
@@ -493,9 +493,7 @@ ssize_t TLSv12::handle_certificate(ReadonlyBytes buffer)
     ssize_t res = 0;
 
     if (buffer.size() < 3) {
-#if TLS_DEBUG
-        dbgln("not enough certificate header data");
-#endif
+        dbgln_if(TLS_DEBUG, "not enough certificate header data");
         return (i8)Error::NeedMoreData;
     }
 
@@ -509,9 +507,7 @@ ssize_t TLSv12::handle_certificate(ReadonlyBytes buffer)
     res += 3;
 
     if (certificate_total_length > buffer.size() - res) {
-#if TLS_DEBUG
-        dbgln("not enough data for claimed total cert length");
-#endif
+        dbgln_if(TLS_DEBUG, "not enough data for claimed total cert length");
         return (i8)Error::NeedMoreData;
     }
     size_t size = certificate_total_length;
@@ -522,18 +518,14 @@ ssize_t TLSv12::handle_certificate(ReadonlyBytes buffer)
     while (size > 0) {
         ++index;
         if (buffer.size() - res < 3) {
-#if TLS_DEBUG
-            dbgln("not enough data for certificate length");
-#endif
+            dbgln_if(TLS_DEBUG, "not enough data for certificate length");
             return (i8)Error::NeedMoreData;
         }
         size_t certificate_size = buffer[res] * 0x10000 + buffer[res + 1] * 0x100 + buffer[res + 2];
         res += 3;
 
         if (buffer.size() - res < certificate_size) {
-#if TLS_DEBUG
-            dbgln("not enough data for certificate body");
-#endif
+            dbgln_if(TLS_DEBUG, "not enough data for certificate body");
             return (i8)Error::NeedMoreData;
         }
 
diff --git a/Userland/Libraries/LibVT/Terminal.cpp b/Userland/Libraries/LibVT/Terminal.cpp
index 06e44d1bf7..49c71a7edf 100644
--- a/Userland/Libraries/LibVT/Terminal.cpp
+++ b/Userland/Libraries/LibVT/Terminal.cpp
@@ -797,9 +797,7 @@ void Terminal::ICH(const ParamVector& params)
 
 void Terminal::on_input(u8 ch)
 {
-#if TERMINAL_DEBUG
-    dbgln("Terminal::on_input: {:#02x} ({:c}), fg={}, bg={}\n", ch, ch, m_current_attribute.foreground_color, m_current_attribute.background_color);
-#endif
+    dbgln_if(TERMINAL_DEBUG, "Terminal::on_input: {:#02x} ({:c}), fg={}, bg={}\n", ch, ch, m_current_attribute.foreground_color, m_current_attribute.background_color);
 
     auto fail_utf8_parse = [this] {
         m_parser_state = Normal;
diff --git a/Userland/Libraries/LibWeb/Layout/FrameBox.cpp b/Userland/Libraries/LibWeb/Layout/FrameBox.cpp
index 4cc5fd3560..bf1439b91d 100644
--- a/Userland/Libraries/LibWeb/Layout/FrameBox.cpp
+++ b/Userland/Libraries/LibWeb/Layout/FrameBox.cpp
@@ -58,11 +58,11 @@ void FrameBox::paint(PaintContext& context, PaintPhase phase)
         context.set_viewport_rect(old_viewport_rect);
         context.painter().restore();
 
-#if HIGHLIGHT_FOCUSED_FRAME_DEBUG
-        if (dom_node().content_frame()->is_focused_frame()) {
-            context.painter().draw_rect(absolute_rect().to<int>(), Color::Cyan);
+        if constexpr (HIGHLIGHT_FOCUSED_FRAME_DEBUG) {
+            if (dom_node().content_frame()->is_focused_frame()) {
+                context.painter().draw_rect(absolute_rect().to<int>(), Color::Cyan);
+            }
         }
-#endif
     }
 }
 
diff --git a/Userland/Libraries/LibWeb/Loader/FrameLoader.cpp b/Userland/Libraries/LibWeb/Loader/FrameLoader.cpp
index 8c1f6dd4c4..726bfead74 100644
--- a/Userland/Libraries/LibWeb/Loader/FrameLoader.cpp
+++ b/Userland/Libraries/LibWeb/Loader/FrameLoader.cpp
@@ -101,10 +101,8 @@ static bool build_gemini_document(DOM::Document& document, const ByteBuffer& dat
     auto gemini_document = Gemini::Document::parse(gemini_data, document.url());
     String html_data = gemini_document->render_to_html();
 
-#if GEMINI_DEBUG
-    dbgln("Gemini data:\n\"\"\"{}\"\"\"", gemini_data);
-    dbgln("Converted to HTML:\n\"\"\"{}\"\"\"", html_data);
-#endif
+    dbgln_if(GEMINI_DEBUG, "Gemini data:\n\"\"\"{}\"\"\"", gemini_data);
+    dbgln_if(GEMINI_DEBUG, "Converted to HTML:\n\"\"\"{}\"\"\"", html_data);
 
     HTML::HTMLDocumentParser parser(document, html_data, "utf-8");
     parser.run(document.url());
diff --git a/Userland/Libraries/LibWeb/Loader/Resource.cpp b/Userland/Libraries/LibWeb/Loader/Resource.cpp
index 9223145f96..9231ec341e 100644
--- a/Userland/Libraries/LibWeb/Loader/Resource.cpp
+++ b/Userland/Libraries/LibWeb/Loader/Resource.cpp
@@ -75,9 +75,7 @@ void Resource::did_load(Badge<ResourceLoader>, ReadonlyBytes data, const HashMap
 
     auto content_type = headers.get("Content-Type");
     if (content_type.has_value()) {
-#if RESOURCE_DEBUG
-        dbgln("Content-Type header: '{}'", content_type.value());
-#endif
+        dbgln_if(RESOURCE_DEBUG, "Content-Type header: '{}'", content_type.value());
         m_encoding = encoding_from_content_type(content_type.value());
         m_mime_type = mime_type_from_content_type(content_type.value());
     } else if (url().protocol() == "data" && !url().data_mime_type().is_empty()) {
@@ -85,9 +83,7 @@ void Resource::did_load(Badge<ResourceLoader>, ReadonlyBytes data, const HashMap
         m_encoding = "utf-8"; // FIXME: This doesn't seem nice.
         m_mime_type = url().data_mime_type();
     } else {
-#if RESOURCE_DEBUG
-        dbgln("No Content-Type header to go on! Guessing based on filename...");
-#endif
+        dbgln_if(RESOURCE_DEBUG, "No Content-Type header to go on! Guessing based on filename...");
         m_encoding = "utf-8"; // FIXME: This doesn't seem nice.
         m_mime_type = Core::guess_mime_type_based_on_filename(url().path());
     }
diff --git a/Userland/Libraries/LibWeb/WebContentClient.cpp b/Userland/Libraries/LibWeb/WebContentClient.cpp
index cb06f27cf1..ce31a3c2ee 100644
--- a/Userland/Libraries/LibWeb/WebContentClient.cpp
+++ b/Userland/Libraries/LibWeb/WebContentClient.cpp
@@ -49,9 +49,7 @@ void WebContentClient::handle(const Messages::WebContentClient::DidInvalidateCon
 
 void WebContentClient::handle(const Messages::WebContentClient::DidChangeSelection&)
 {
-#if SPAM_DEBUG
-    dbgln("handle: WebContentClient::DidChangeSelection!");
-#endif
+    dbgln_if(SPAM_DEBUG, "handle: WebContentClient::DidChangeSelection!");
     m_view.notify_server_did_change_selection({});
 }
 
@@ -105,9 +103,7 @@ void WebContentClient::handle(const Messages::WebContentClient::DidHoverLink& me
 
 void WebContentClient::handle(const Messages::WebContentClient::DidUnhoverLink&)
 {
-#if SPAM_DEBUG
-    dbgln("handle: WebContentClient::DidUnhoverLink!");
-#endif
+    dbgln_if(SPAM_DEBUG, "handle: WebContentClient::DidUnhoverLink!");
     m_view.notify_server_did_unhover_link({});
 }
 
diff --git a/Userland/Services/LookupServer/LookupServer.cpp b/Userland/Services/LookupServer/LookupServer.cpp
index cac9f0f28e..0f8622cba9 100644
--- a/Userland/Services/LookupServer/LookupServer.cpp
+++ b/Userland/Services/LookupServer/LookupServer.cpp
@@ -113,9 +113,7 @@ void LookupServer::load_etc_hosts()
 
 Vector<DNSAnswer> LookupServer::lookup(const DNSName& name, unsigned short record_type)
 {
-#if LOOKUPSERVER_DEBUG
-    dbgln("Got request for '{}'", name.as_string());
-#endif
+    dbgln_if(LOOKUPSERVER_DEBUG, "Got request for '{}'", name.as_string());
 
     Vector<DNSAnswer> answers;
     auto add_answer = [&](const DNSAnswer& answer) {
@@ -144,9 +142,7 @@ Vector<DNSAnswer> LookupServer::lookup(const DNSName& name, unsigned short recor
         for (auto& answer : cached_answers.value()) {
             // TODO: Actually remove expired answers from the cache.
             if (answer.type() == record_type && !answer.has_expired()) {
-#if LOOKUPSERVER_DEBUG
-                dbgln("Cache hit: {} -> {}", name.as_string(), answer.record_data());
-#endif
+                dbgln_if(LOOKUPSERVER_DEBUG, "Cache hit: {} -> {}", name.as_string(), answer.record_data());
                 add_answer(answer);
             }
         }
@@ -156,9 +152,7 @@ Vector<DNSAnswer> LookupServer::lookup(const DNSName& name, unsigned short recor
 
     // Third, ask the upstream nameservers.
     for (auto& nameserver : m_nameservers) {
-#if LOOKUPSERVER_DEBUG
-        dbgln("Doing lookup using nameserver '{}'", nameserver);
-#endif
+        dbgln_if(LOOKUPSERVER_DEBUG, "Doing lookup using nameserver '{}'", nameserver);
         bool did_get_response = false;
         int retries = 3;
         Vector<DNSAnswer> upstream_answers;
diff --git a/Userland/Services/Taskbar/TaskbarWindow.cpp b/Userland/Services/Taskbar/TaskbarWindow.cpp
index 25e25a2e2e..a6dd4da3f1 100644
--- a/Userland/Services/Taskbar/TaskbarWindow.cpp
+++ b/Userland/Services/Taskbar/TaskbarWindow.cpp
@@ -240,12 +240,12 @@ void TaskbarWindow::wm_event(GUI::WMEvent& event)
     WindowIdentifier identifier { event.client_id(), event.window_id() };
     switch (event.type()) {
     case GUI::Event::WM_WindowRemoved: {
-#if EVENT_DEBUG
-        auto& removed_event = static_cast<GUI::WMWindowRemovedEvent&>(event);
-        dbgln("WM_WindowRemoved: client_id={}, window_id={}",
-            removed_event.client_id(),
-            removed_event.window_id());
-#endif
+        if constexpr (EVENT_DEBUG) {
+            auto& removed_event = static_cast<GUI::WMWindowRemovedEvent&>(event);
+            dbgln("WM_WindowRemoved: client_id={}, window_id={}",
+                removed_event.client_id(),
+                removed_event.window_id());
+        }
         if (auto* window = WindowList::the().window(identifier))
             remove_window_button(*window, true);
         WindowList::the().remove_window(identifier);
@@ -253,13 +253,13 @@ void TaskbarWindow::wm_event(GUI::WMEvent& event)
         break;
     }
     case GUI::Event::WM_WindowRectChanged: {
-#if EVENT_DEBUG
-        auto& changed_event = static_cast<GUI::WMWindowRectChangedEvent&>(event);
-        dbgln("WM_WindowRectChanged: client_id={}, window_id={}, rect={}",
-            changed_event.client_id(),
-            changed_event.window_id(),
-            changed_event.rect());
-#endif
+        if constexpr (EVENT_DEBUG) {
+            auto& changed_event = static_cast<GUI::WMWindowRectChangedEvent&>(event);
+            dbgln("WM_WindowRectChanged: client_id={}, window_id={}, rect={}",
+                changed_event.client_id(),
+                changed_event.window_id(),
+                changed_event.rect());
+        }
         break;
     }
 
@@ -274,15 +274,15 @@ void TaskbarWindow::wm_event(GUI::WMEvent& event)
 
     case GUI::Event::WM_WindowStateChanged: {
         auto& changed_event = static_cast<GUI::WMWindowStateChangedEvent&>(event);
-#if EVENT_DEBUG
-        dbgln("WM_WindowStateChanged: client_id={}, window_id={}, title={}, rect={}, is_active={}, is_minimized={}",
-            changed_event.client_id(),
-            changed_event.window_id(),
-            changed_event.title(),
-            changed_event.rect(),
-            changed_event.is_active(),
-            changed_event.is_minimized());
-#endif
+        if constexpr (EVENT_DEBUG) {
+            dbgln("WM_WindowStateChanged: client_id={}, window_id={}, title={}, rect={}, is_active={}, is_minimized={}",
+                changed_event.client_id(),
+                changed_event.window_id(),
+                changed_event.title(),
+                changed_event.rect(),
+                changed_event.is_active(),
+                changed_event.is_minimized());
+        }
         if (changed_event.window_type() != GUI::WindowType::Normal || changed_event.is_frameless()) {
             if (auto* window = WindowList::the().window(identifier))
                 remove_window_button(*window, false);
diff --git a/Userland/Services/WindowServer/Compositor.cpp b/Userland/Services/WindowServer/Compositor.cpp
index 6d61f55ca3..b28e1288ce 100644
--- a/Userland/Services/WindowServer/Compositor.cpp
+++ b/Userland/Services/WindowServer/Compositor.cpp
@@ -865,9 +865,7 @@ void Compositor::recompute_occlusions()
         return IterationDecision::Continue;
     });
 
-#if OCCLUSIONS_DEBUG
-    dbgln("OCCLUSIONS:");
-#endif
+    dbgln_if(OCCLUSIONS_DEBUG, "OCCLUSIONS:");
 
     auto screen_rect = Screen::the().rect();
 
diff --git a/Userland/Services/WindowServer/EventLoop.cpp b/Userland/Services/WindowServer/EventLoop.cpp
index 632a5ac1e2..5bc5b4a062 100644
--- a/Userland/Services/WindowServer/EventLoop.cpp
+++ b/Userland/Services/WindowServer/EventLoop.cpp
@@ -97,9 +97,7 @@ void EventLoop::drain_mouse()
         return;
     for (size_t i = 0; i < npackets; ++i) {
         auto& packet = packets[i];
-#if WSMESSAGELOOP_DEBUG
-        dbgln("EventLoop: Mouse X {}, Y {}, Z {}, relative={}", packet.x, packet.y, packet.z, packet.is_relative);
-#endif
+        dbgln_if(WSMESSAGELOOP_DEBUG, "EventLoop: Mouse X {}, Y {}, Z {}, relative={}", packet.x, packet.y, packet.z, packet.is_relative);
         buttons = packet.buttons;
 
         state.is_relative = packet.is_relative;
@@ -115,9 +113,7 @@ void EventLoop::drain_mouse()
 
         if (buttons != state.buttons) {
             state.buttons = buttons;
-#if WSMESSAGELOOP_DEBUG
-            dbgln("EventLoop: Mouse Button Event");
-#endif
+            dbgln_if(WSMESSAGELOOP_DEBUG, "EventLoop: Mouse Button Event");
             screen.on_receive_mouse_data(state);
             if (state.is_relative) {
                 state.x = 0;
diff --git a/Userland/Services/WindowServer/Screen.cpp b/Userland/Services/WindowServer/Screen.cpp
index e019dd07ea..381581f5fd 100644
--- a/Userland/Services/WindowServer/Screen.cpp
+++ b/Userland/Services/WindowServer/Screen.cpp
@@ -124,14 +124,10 @@ void Screen::on_receive_mouse_data(const MousePacket& packet)
     auto prev_location = m_physical_cursor_location / m_scale_factor;
     if (packet.is_relative) {
         m_physical_cursor_location.move_by(packet.x * m_acceleration_factor, packet.y * m_acceleration_factor);
-#if WSSCREEN_DEBUG
-        dbgln("Screen: New Relative mouse point @ {}", m_physical_cursor_location);
-#endif
+        dbgln_if(WSSCREEN_DEBUG, "Screen: New Relative mouse point @ {}", m_physical_cursor_location);
     } else {
         m_physical_cursor_location = { packet.x * physical_width() / 0xffff, packet.y * physical_height() / 0xffff };
-#if WSSCREEN_DEBUG
-        dbgln("Screen: New Absolute mouse point @ {}", m_physical_cursor_location);
-#endif
+        dbgln_if(WSSCREEN_DEBUG, "Screen: New Absolute mouse point @ {}", m_physical_cursor_location);
     }
 
     m_physical_cursor_location.constrain(physical_rect());