Moving SectionMemoryManager into RuntimeDyld and adding unit tests for it.

The SectionMemoryManager now supports (and requires) applying section-specific page permissions.  Clients using this memory manager must call either MCJIT::finalizeObject() or SectionMemoryManager::applyPermissions() before executing JITed code.

See r168718 for changes from the previous implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168721 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 172 insertions, 0 deletions

diff --git a/unittests/ExecutionEngine/MCJIT/MCJITMemoryManagerTest.cpp b/unittests/ExecutionEngine/MCJIT/MCJITMemoryManagerTest.cpp
new file mode 100644
index 0000000000..eeea9d7652
--- /dev/null
+++ b/unittests/ExecutionEngine/MCJIT/MCJITMemoryManagerTest.cpp
@@ -0,0 +1,172 @@
+//===- MCJITMemoryManagerTest.cpp - Unit tests for the JIT memory manager -===//

+//

+//                     The LLVM Compiler Infrastructure

+//

+// This file is distributed under the University of Illinois Open Source

+// License. See LICENSE.TXT for details.

+//

+//===----------------------------------------------------------------------===//

+

+#include "gtest/gtest.h"

+#include "llvm/ADT/OwningPtr.h"

+#include "llvm/ExecutionEngine/SectionMemoryManager.h"

+#include "llvm/ExecutionEngine/JIT.h"

+

+using namespace llvm;

+

+namespace {

+

+TEST(MCJITMemoryManagerTest, BasicAllocations) {

+  OwningPtr<SectionMemoryManager> MemMgr(new SectionMemoryManager());

+

+  uint8_t *code1 = MemMgr->allocateCodeSection(256, 0, 1);

+  uint8_t *data1 = MemMgr->allocateDataSection(256, 0, 2, true);

+  uint8_t *code2 = MemMgr->allocateCodeSection(256, 0, 3);

+  uint8_t *data2 = MemMgr->allocateDataSection(256, 0, 4, false);

+

+  EXPECT_NE((uint8_t*)0, code1);

+  EXPECT_NE((uint8_t*)0, code2);

+  EXPECT_NE((uint8_t*)0, data1);

+  EXPECT_NE((uint8_t*)0, data2);

+

+  // Initialize the data

+  for (unsigned i = 0; i < 256; ++i) {

+    code1[i] = 1;

+    code2[i] = 2;

+    data1[i] = 3;

+    data2[i] = 4;

+  }

+

+  // Verify the data (this is checking for overlaps in the addresses)

+  for (unsigned i = 0; i < 256; ++i) {

+    EXPECT_EQ(1, code1[i]);

+    EXPECT_EQ(2, code2[i]);

+    EXPECT_EQ(3, data1[i]);

+    EXPECT_EQ(4, data2[i]);

+  }

+

+  std::string Error;

+  EXPECT_FALSE(MemMgr->applyPermissions(&Error));

+}

+

+TEST(MCJITMemoryManagerTest, LargeAllocations) {

+  OwningPtr<SectionMemoryManager> MemMgr(new SectionMemoryManager());

+

+  uint8_t *code1 = MemMgr->allocateCodeSection(0x100000, 0, 1);

+  uint8_t *data1 = MemMgr->allocateDataSection(0x100000, 0, 2, true);

+  uint8_t *code2 = MemMgr->allocateCodeSection(0x100000, 0, 3);

+  uint8_t *data2 = MemMgr->allocateDataSection(0x100000, 0, 4, false);

+

+  EXPECT_NE((uint8_t*)0, code1);

+  EXPECT_NE((uint8_t*)0, code2);

+  EXPECT_NE((uint8_t*)0, data1);

+  EXPECT_NE((uint8_t*)0, data2);

+

+  // Initialize the data

+  for (unsigned i = 0; i < 0x100000; ++i) {

+    code1[i] = 1;

+    code2[i] = 2;

+    data1[i] = 3;

+    data2[i] = 4;

+  }

+

+  // Verify the data (this is checking for overlaps in the addresses)

+  for (unsigned i = 0; i < 0x100000; ++i) {

+    EXPECT_EQ(1, code1[i]);

+    EXPECT_EQ(2, code2[i]);

+    EXPECT_EQ(3, data1[i]);

+    EXPECT_EQ(4, data2[i]);

+  }

+

+  std::string Error;

+  EXPECT_FALSE(MemMgr->applyPermissions(&Error));

+}

+

+TEST(MCJITMemoryManagerTest, ManyAllocations) {

+  OwningPtr<SectionMemoryManager> MemMgr(new SectionMemoryManager());

+

+  uint8_t* code[10000];

+  uint8_t* data[10000];

+

+  for (unsigned i = 0; i < 10000; ++i) {

+    const bool isReadOnly = i % 2 == 0;

+

+    code[i] = MemMgr->allocateCodeSection(32, 0, 1);

+    data[i] = MemMgr->allocateDataSection(32, 0, 2, isReadOnly);

+

+    for (unsigned j = 0; j < 32; j++) {

+      code[i][j] = 1 + (i % 254);

+      data[i][j] = 2 + (i % 254);

+    }

+

+    EXPECT_NE((uint8_t *)0, code[i]);

+    EXPECT_NE((uint8_t *)0, data[i]);

+  }

+

+  // Verify the data (this is checking for overlaps in the addresses)

+  for (unsigned i = 0; i < 10000; ++i) {

+    for (unsigned j = 0; j < 32;j++ ) {

+      uint8_t ExpectedCode = 1 + (i % 254);

+      uint8_t ExpectedData = 2 + (i % 254);

+      EXPECT_EQ(ExpectedCode, code[i][j]);

+      EXPECT_EQ(ExpectedData, data[i][j]);

+    }

+  }

+

+  std::string Error;

+  EXPECT_FALSE(MemMgr->applyPermissions(&Error));

+}

+

+TEST(MCJITMemoryManagerTest, ManyVariedAllocations) {

+  OwningPtr<SectionMemoryManager> MemMgr(new SectionMemoryManager());

+

+  uint8_t* code[10000];

+  uint8_t* data[10000];

+

+  for (unsigned i = 0; i < 10000; ++i) {

+    uintptr_t CodeSize = i % 16 + 1;

+    uintptr_t DataSize = i % 8 + 1;

+

+    bool isReadOnly = i % 3 == 0;

+    unsigned Align = 8 << (i % 4);

+

+    code[i] = MemMgr->allocateCodeSection(CodeSize, Align, i);

+    data[i] = MemMgr->allocateDataSection(DataSize, Align, i + 10000,

+                                          isReadOnly);

+

+    for (unsigned j = 0; j < CodeSize; j++) {

+      code[i][j] = 1 + (i % 254);

+    }

+

+    for (unsigned j = 0; j < DataSize; j++) {

+      data[i][j] = 2 + (i % 254);

+    }

+

+    EXPECT_NE((uint8_t *)0, code[i]);

+    EXPECT_NE((uint8_t *)0, data[i]);

+

+    uintptr_t CodeAlign = Align ? (uintptr_t)code[i] % Align : 0;

+    uintptr_t DataAlign = Align ? (uintptr_t)data[i] % Align : 0;

+

+    EXPECT_EQ((uintptr_t)0, CodeAlign);

+    EXPECT_EQ((uintptr_t)0, DataAlign);

+  }

+

+  for (unsigned i = 0; i < 10000; ++i) {

+    uintptr_t CodeSize = i % 16 + 1;

+    uintptr_t DataSize = i % 8 + 1;

+

+    for (unsigned j = 0; j < CodeSize; j++) {

+      uint8_t ExpectedCode = 1 + (i % 254);

+      EXPECT_EQ(ExpectedCode, code[i][j]);

+    }

+

+    for (unsigned j = 0; j < DataSize; j++) {

+      uint8_t ExpectedData = 2 + (i % 254);

+      EXPECT_EQ(ExpectedData, data[i][j]); 

+    }

+  }

+}

+

+} // Namespace

+