From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 25 Jan 2016 18:29:16 +0000 (+0000)
Subject: Pass --wrap=pthread_create to linker for -fsplit-stack.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=04d1d959fdcad8573b07a4b60a95795e084d850a;p=clang

Pass --wrap=pthread_create to linker for -fsplit-stack.

From

https://gcc.gnu.org/ml/gcc-patches/2010-09/msg01807.html

-fsplit-stack should pass --wrap=pthread_create to linker for -fsplit-stack
It is needed to initialize the stack guard.  This fixes PR 20148.

Patch by H.J Lu!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@258698 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 6a1517f180..574bf5cd77 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -9001,6 +9001,9 @@ void gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       if (WantPthread && !isAndroid)
         CmdArgs.push_back("-lpthread");
 
+      if (Args.hasArg(options::OPT_fsplit_stack))
+        CmdArgs.push_back("--wrap=pthread_create");
+
       CmdArgs.push_back("-lc");
 
       if (Args.hasArg(options::OPT_static))
diff --git a/test/Driver/split-stack-ld.c b/test/Driver/split-stack-ld.c
new file mode 100644
index 0000000000..3441d542cb
--- /dev/null
+++ b/test/Driver/split-stack-ld.c
@@ -0,0 +1,17 @@
+// Test split stack ld flags.
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target i386-unknown-linux -fsplit-stack \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LINUX-I386 %s
+//
+// CHECK-LINUX-I386: "--wrap=pthread_create"
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fsplit-stack \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LINUX-X86-64 %s
+//
+// CHECK-LINUX-X86-64: "--wrap=pthread_create"