From: Marcos Pividori <mpividori@google.com>
Date: Fri, 10 Feb 2017 01:40:28 +0000 (+0000)
Subject: [libFuzzer] Export external functions on tests.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=671eb85b7219a1a3e6f1e1c646886e9351f5ea58;p=llvm

[libFuzzer] Export external functions on tests.

We need to export external functions so they are found when calling
GetProcAddress() on Windows. But we can't use `__declspec(dllexport)` because
we want the targets to be completely independent from the fuzz engines and don't
depend on other header files. Also, we don't want to include platform specific
code managed with conditional macros.
So, the solution is to add the exported symbols with linker flags in cmake.

Differential revision: https://reviews.llvm.org/D29752

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294688 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Fuzzer/test/CMakeLists.txt b/lib/Fuzzer/test/CMakeLists.txt
index cf9c99a36ca..890cbeef5e4 100644
--- a/lib/Fuzzer/test/CMakeLists.txt
+++ b/lib/Fuzzer/test/CMakeLists.txt
@@ -142,6 +142,18 @@ foreach(Test ${Tests})
   add_libfuzzer_test(${Test} SOURCES ${Test}.cpp)
 endforeach()
 
+function(test_export_symbol target symbol)
+  if(MSVC)
+    set_target_properties(LLVMFuzzer-${target} PROPERTIES LINK_FLAGS
+        "-export:${symbol}")
+  endif()
+endfunction()
+
+test_export_symbol(InitializeTest "LLVMFuzzerInitialize")
+test_export_symbol(BogusInitializeTest "LLVMFuzzerInitialize")
+test_export_symbol(CustomCrossOverTest "LLVMFuzzerCustomCrossOver")
+test_export_symbol(CustomMutatorTest "LLVMFuzzerCustomMutator")
+
 ###############################################################################
 # Unit tests
 ###############################################################################