From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Kaster <akaster@serenityos.org>
Date: Fri, 4 Mar 2022 15:13:42 -0700
Subject: [PATCH] [compiler-rt/llvm] Enable profile instrumentation for
 SerenityOS

Treat SerenityOS the same as other *NIX platforms that behave close
enough to linux to use the pre-canned InstrProfiling implementation.

Curiously, enabling profiling for the SerenityOS target changes the ELF
OS ABI for userspace binaries to 3, or GNU/Linux.
---
 compiler-rt/cmake/config-ix.cmake                      | 2 +-
 compiler-rt/lib/profile/InstrProfilingPlatformLinux.c  | 3 ++-
 compiler-rt/lib/profile/InstrProfilingPlatformOther.c  | 2 +-
 llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp | 3 ++-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index 7a47b7f71..8d4211deb 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -738,7 +738,7 @@ else()
 endif()
 
 if (PROFILE_SUPPORTED_ARCH AND NOT LLVM_USE_SANITIZER AND
-    OS_NAME MATCHES "Darwin|Linux|FreeBSD|Windows|Android|Fuchsia|SunOS|NetBSD|AIX")
+    OS_NAME MATCHES "Darwin|Linux|FreeBSD|Windows|Android|Fuchsia|SunOS|NetBSD|AIX|SerenityOS")
   set(COMPILER_RT_HAS_PROFILE TRUE)
 else()
   set(COMPILER_RT_HAS_PROFILE FALSE)
diff --git a/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c b/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
index 592c09b49..1833682d7 100644
--- a/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
+++ b/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
@@ -7,7 +7,8 @@
 \*===----------------------------------------------------------------------===*/
 
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
-    (defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__)
+    (defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__) || \
+    defined(__serenity__)
 
 #include <elf.h>
 #include <link.h>
diff --git a/compiler-rt/lib/profile/InstrProfilingPlatformOther.c b/compiler-rt/lib/profile/InstrProfilingPlatformOther.c
index 3e9b3ca0a..d257013dd 100644
--- a/compiler-rt/lib/profile/InstrProfilingPlatformOther.c
+++ b/compiler-rt/lib/profile/InstrProfilingPlatformOther.c
@@ -8,7 +8,7 @@
 
 #if !defined(__APPLE__) && !defined(__linux__) && !defined(__FreeBSD__) &&     \
     !(defined(__sun__) && defined(__svr4__)) && !defined(__NetBSD__) &&        \
-    !defined(_WIN32)
+    !defined(_WIN32) && !defined(__serenity__)
 
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index 6868408ef..eaa1b64d2 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -857,7 +857,8 @@ static bool needsRuntimeRegistrationOfSectionRange(const Triple &TT) {
     return false;
   // Use linker script magic to get data/cnts/name start/end.
   if (TT.isOSLinux() || TT.isOSFreeBSD() || TT.isOSNetBSD() ||
-      TT.isOSSolaris() || TT.isOSFuchsia() || TT.isPS4CPU() || TT.isOSWindows())
+      TT.isOSSolaris() || TT.isOSFuchsia() || TT.isPS4CPU() ||
+      TT.isOSWindows() || TT.isOSSerenity())
     return false;
 
   return true;