From da6d5b919d0cce5561f4800a1540cac6938d78b9 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Tue, 5 May 2015 08:09:46 +0000
Subject: [PATCH] tsan: add memory access functions that accept pc

This is required for Java support, as real PCs don't work for Java.

llvm-svn: 236484
---
 compiler-rt/lib/tsan/rtl/tsan_interface.cc    | 10 ++++++++
 compiler-rt/lib/tsan/rtl/tsan_interface.h     | 12 +++++++++
 compiler-rt/lib/tsan/rtl/tsan_interface_inl.h | 32 ++++++++++++++++++++++++
 compiler-rt/test/tsan/java.h                  |  3 +++
 compiler-rt/test/tsan/java_race_pc.cc         | 36 +++++++++++++++++++++++++++
 5 files changed, 93 insertions(+)
 create mode 100644 compiler-rt/test/tsan/java_race_pc.cc

diff --git a/compiler-rt/lib/tsan/rtl/tsan_interface.cc b/compiler-rt/lib/tsan/rtl/tsan_interface.cc
index 9bc9a69..809d2ab 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interface.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_interface.cc
@@ -38,6 +38,16 @@ void __tsan_write16(void *addr) {
   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
 }
 
+void __tsan_read16_pc(void *addr, void *pc) {
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
+}
+
+void __tsan_write16_pc(void *addr, void *pc) {
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
+}
+
 // __tsan_unaligned_read/write calls are emitted by compiler.
 
 void __tsan_unaligned_read2(const void *addr) {
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interface.h b/compiler-rt/lib/tsan/rtl/tsan_interface.h
index a05e6f0..41e084b 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interface.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_interface.h
@@ -51,6 +51,18 @@ SANITIZER_INTERFACE_ATTRIBUTE void __tsan_unaligned_write4(void *addr);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_unaligned_write8(void *addr);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_unaligned_write16(void *addr);
 
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read1_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read2_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read4_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read8_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read16_pc(void *addr, void *pc);
+
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_write1_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_write2_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_write4_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_write8_pc(void *addr, void *pc);
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_write16_pc(void *addr, void *pc);
+
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_vptr_read(void **vptr_p);
 SANITIZER_INTERFACE_ATTRIBUTE
 void __tsan_vptr_update(void **vptr_p, void *new_val);
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interface_inl.h b/compiler-rt/lib/tsan/rtl/tsan_interface_inl.h
index 0187e49..8852aa3 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interface_inl.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_interface_inl.h
@@ -50,6 +50,38 @@ void __tsan_write8(void *addr) {
   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
 }
 
+void __tsan_read1_pc(void *addr, void *pc) {
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog1);
+}
+
+void __tsan_read2_pc(void *addr, void *pc) {
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog2);
+}
+
+void __tsan_read4_pc(void *addr, void *pc) {
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog4);
+}
+
+void __tsan_read8_pc(void *addr, void *pc) {
+  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
+}
+
+void __tsan_write1_pc(void *addr, void *pc) {
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog1);
+}
+
+void __tsan_write2_pc(void *addr, void *pc) {
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog2);
+}
+
+void __tsan_write4_pc(void *addr, void *pc) {
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog4);
+}
+
+void __tsan_write8_pc(void *addr, void *pc) {
+  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
+}
+
 void __tsan_vptr_update(void **vptr_p, void *new_val) {
   CHECK_EQ(sizeof(vptr_p), 8);
   if (*vptr_p != new_val) {
diff --git a/compiler-rt/test/tsan/java.h b/compiler-rt/test/tsan/java.h
index 35fdbc1..6923e86 100644
--- a/compiler-rt/test/tsan/java.h
+++ b/compiler-rt/test/tsan/java.h
@@ -18,4 +18,7 @@ int  __tsan_java_mutex_unlock_rec(jptr addr);
 int  __tsan_java_acquire(jptr addr);
 int  __tsan_java_release(jptr addr);
 int  __tsan_java_release_store(jptr addr);
+
+void __tsan_read1_pc(jptr addr, jptr pc);
+void __tsan_write1_pc(jptr addr, jptr pc);
 }
diff --git a/compiler-rt/test/tsan/java_race_pc.cc b/compiler-rt/test/tsan/java_race_pc.cc
new file mode 100644
index 0000000..015a0b1
--- /dev/null
+++ b/compiler-rt/test/tsan/java_race_pc.cc
@@ -0,0 +1,36 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
+#include "java.h"
+
+void foobar() {
+}
+
+void barbaz() {
+}
+
+void *Thread(void *p) {
+  barrier_wait(&barrier);
+  __tsan_read1_pc((jptr)p, (jptr)foobar + 1);
+  return 0;
+}
+
+int main() {
+  barrier_init(&barrier, 2);
+  int const kHeapSize = 1024 * 1024;
+  jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
+  __tsan_java_init(jheap, kHeapSize);
+  const int kBlockSize = 16;
+  __tsan_java_alloc(jheap, kBlockSize);
+  pthread_t th;
+  pthread_create(&th, 0, Thread, (void*)jheap);
+  __tsan_write1_pc((jptr)jheap, (jptr)barbaz + 1);
+  barrier_wait(&barrier);
+  pthread_join(th, 0);
+  __tsan_java_free(jheap, kBlockSize);
+  fprintf(stderr, "DONE\n");
+  return __tsan_java_fini();
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race
+// CHECK:     #0 foobar
+// CHECK:     #0 barbaz
+// CHECK: DONE
-- 
2.7.4