[llvm] Mangle all llvm symbols to avoid collisions

Package.swift

@@ -8,10 +8,6 @@ let package = Package(
     .library(
       name: "IndexStoreDB",
       targets: ["IndexStoreDB"]),
-    .library(
-      name: "IndexStoreDB-dynamic",
-      type: .dynamic,
-      targets: ["IndexStoreDB"]),
     .library(
       name: "IndexStoreDB_CXX",
       targets: ["IndexStoreDB_Index"]),

Utilities/import-llvm

@@ -9,8 +9,10 @@
 import errno
 import optparse
 import os
+import re
 import shutil
 import sys
+import subprocess
 
 # ADT types.
 ADT_imports = ['EpochTracker', 'iterator', 'iterator_range', 'Hashing', 'None', 'Optional',
@@ -78,6 +80,52 @@ def copyfile(src, dst):
     note("cp %r %r" % (src, dst))
     shutil.copyfile(src, dst)
 
+def includes_prefix(source, include_dir):
+    defs = subprocess.check_output([
+        'clang', '-std=c++14', '-dM', '-E',
+        '-I', include_dir,
+        '-x', 'c++', source])
+
+    return "INDEXSTOREDB_PREFIX_H" in defs
+
+def is_llvm_leaf_source(source):
+    # AIXDataTypes is a false negative.
+    return subprocess.call("grep '# *include *\"llvm' %s | grep --quiet -v AIXDataTypes" % source, shell=True)
+
+def add_prefix(str):
+    snippet = '#include "llvm/Config/indexstoredb-prefix.h"\n'
+
+    m = re.search(r'#ifndef *([A-Za-z_]*)\n#define *\1 *\n', str)
+    if m:
+        return str[:m.end()] + '\n' + snippet + str[m.end():]
+
+    i = str.find(r'#include')
+    if i != -1:
+        return str[:i] + snippet + str[i:]
+
+    # If we ever hit this, we could find the end of the copyright header comment.
+    print >>sys.stderr, 'error: could not find existing #include or header guards'
+    sys.exit(1)
+
+def maybe_add_prefix(source, include_dir):
+    ext = os.path.splitext(source)[1]
+    if not ext in ['.h', '.cpp', '.c']:
+        return
+    if not is_llvm_leaf_source(source):
+        # Skip files that include other llvm headers; we will add the include to
+        # the leaf header.
+        return
+    if includes_prefix(source, include_dir):
+        # Skip files that already include the prefix header.
+        return
+
+    note("adding prefix header to %r" % source)
+    with open(source, 'r+') as file:
+        new = add_prefix(file.read())
+        file.seek(0)
+        file.write(new)
+        file.truncate()
+
 def main():
     parser = optparse.OptionParser("usage: %prog <llvm-source-path>")
     (opts, args) = parser.parse_args()
@@ -131,5 +179,21 @@ def main():
     for name in C_imports:
         import_c_header(name + '.h')
 
+    print ""
+    print "Adding prefix header includes"
+
+    base_dirs = [
+        os.path.join(sourcekit_srcroot, 'include', 'llvm'),
+        os.path.join(sourcekit_srcroot, 'include', 'llvm-c'),
+        os.path.join(sourcekit_srcroot, 'lib', 'LLVMSupport'),
+    ]
+
+    include_dir = os.path.join(sourcekit_srcroot, 'include')
+
+    for base in base_dirs:
+        for root, dirs, files in os.walk(base):
+            for file in files:
+                maybe_add_prefix(os.path.join(root, file), include_dir)
+
 if __name__ == '__main__':
     main()

include/llvm-c/DataTypes.h

@@ -24,6 +24,8 @@
 #ifndef LLVM_C_DATATYPES_H
 #define LLVM_C_DATATYPES_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #ifdef __cplusplus
 #include <cmath>
 #else

include/llvm-c/ErrorHandling.h

@@ -14,6 +14,8 @@
 #ifndef LLVM_C_ERROR_HANDLING_H
 #define LLVM_C_ERROR_HANDLING_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/llvm/ADT/IntrusiveRefCntPtr.h

@@ -56,6 +56,8 @@
 #ifndef LLVM_ADT_INTRUSIVEREFCNTPTR_H
 #define LLVM_ADT_INTRUSIVEREFCNTPTR_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <atomic>
 #include <cassert>
 #include <cstddef>

include/llvm/ADT/None.h

@@ -16,6 +16,8 @@
 #ifndef LLVM_ADT_NONE_H
 #define LLVM_ADT_NONE_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 namespace llvm {
 /// A simple null object to allow implicit construction of Optional<T>
 /// and similar types without having to spell out the specialization's name.

include/llvm/ADT/iterator_range.h

@@ -19,6 +19,8 @@
 #ifndef LLVM_ADT_ITERATOR_RANGE_H
 #define LLVM_ADT_ITERATOR_RANGE_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <iterator>
 #include <utility>
 

include/llvm/Config/abi-breaking.h

@@ -12,6 +12,8 @@
 #ifndef LLVM_ABI_BREAKING_CHECKS_H
 #define LLVM_ABI_BREAKING_CHECKS_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 /* Define to enable checks that alter the LLVM C++ ABI */
 #define LLVM_ENABLE_ABI_BREAKING_CHECKS 0
 

include/llvm/Config/indexstoredb-prefix.h

@@ -0,0 +1,23 @@
+/*===------- llvm/Config/indexstoredb-prefix.h --------------------*- C -*-===*/
+/*                                                                            */
+/*                     The LLVM Compiler Infrastructure                       */
+/*                                                                            */
+/* This file is distributed under the University of Illinois Open Source      */
+/* License. See LICENSE.TXT for details.                                      */
+/*                                                                            */
+/*===----------------------------------------------------------------------===*/
+
+#ifndef INDEXSTOREDB_PREFIX_H
+#define INDEXSTOREDB_PREFIX_H
+
+/* HACK: Rename all of the llvm symbols so that they will not collide if another
+ * copy of llvm is linked into the same image. The use of llvm within IndexStore
+ * is purely an implementation detail. Using a source-level rename is a
+ * workaround for the lack of symbol visibility controls in swiftpm. Ideally we
+ * could do this with a combination of `-fvisibility=hidden` and `ld -r`.
+*/
+
+#define llvm indexstoredb_llvm
+#define LLVMEnablePrettyStackTrace indexstoredb_LLVMEnablePrettyStackTrace
+
+#endif // INDEXSTOREDB_PREFIX_H

include/llvm/Config/llvm-config.h

@@ -14,6 +14,8 @@
 #ifndef LLVM_CONFIG_H
 #define LLVM_CONFIG_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 /* Define if LLVM_ENABLE_DUMP is enabled */
 /* #undef LLVM_ENABLE_DUMP */
 

include/llvm/Support/ARMBuildAttributes.h

@@ -19,6 +19,8 @@
 #ifndef LLVM_SUPPORT_ARMBUILDATTRIBUTES_H
 #define LLVM_SUPPORT_ARMBUILDATTRIBUTES_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 namespace llvm {
 class StringRef;
 

include/llvm/Support/Capacity.h

@@ -15,6 +15,8 @@
 #ifndef LLVM_SUPPORT_CAPACITY_H
 #define LLVM_SUPPORT_CAPACITY_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <cstddef>
 
 namespace llvm {

include/llvm/Support/ConvertUTF.h

@@ -90,6 +90,8 @@
 #ifndef LLVM_SUPPORT_CONVERTUTF_H
 #define LLVM_SUPPORT_CONVERTUTF_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <cstddef>
 #include <string>
 #include <system_error>

include/llvm/Support/DataTypes.h

@@ -26,6 +26,8 @@
 #ifndef SUPPORT_DATATYPES_H
 #define SUPPORT_DATATYPES_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #define HAVE_INTTYPES_H 1
 #define HAVE_STDINT_H 1
 #define HAVE_UINT64_T 1

include/llvm/Support/Debug.h

@@ -29,6 +29,8 @@
 #ifndef LLVM_SUPPORT_DEBUG_H
 #define LLVM_SUPPORT_DEBUG_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 namespace llvm {
 
 class raw_ostream;

include/llvm/Support/Errc.h

@@ -30,6 +30,8 @@
 #ifndef LLVM_SUPPORT_ERRC_H
 #define LLVM_SUPPORT_ERRC_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <system_error>
 
 namespace llvm {

include/llvm/Support/Errno.h

@@ -14,6 +14,8 @@
 #ifndef LLVM_SUPPORT_ERRNO_H
 #define LLVM_SUPPORT_ERRNO_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <cerrno>
 #include <string>
 #include <type_traits>

include/llvm/Support/Locale.h

@@ -1,6 +1,8 @@
 #ifndef LLVM_SUPPORT_LOCALE_H
 #define LLVM_SUPPORT_LOCALE_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 namespace llvm {
 class StringRef;
 

include/llvm/Support/ManagedStatic.h

@@ -14,6 +14,8 @@
 #ifndef LLVM_SUPPORT_MANAGEDSTATIC_H
 #define LLVM_SUPPORT_MANAGEDSTATIC_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <atomic>
 #include <cstddef>
 

include/llvm/Support/Signals.h

@@ -15,6 +15,8 @@
 #ifndef LLVM_SUPPORT_SIGNALS_H
 #define LLVM_SUPPORT_SIGNALS_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <string>
 
 namespace llvm {

include/llvm/Support/Unicode.h

@@ -15,6 +15,8 @@
 #ifndef LLVM_SUPPORT_UNICODE_H
 #define LLVM_SUPPORT_UNICODE_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 namespace llvm {
 class StringRef;
 

include/llvm/Support/UniqueLock.h

@@ -15,6 +15,8 @@
 #ifndef LLVM_SUPPORT_UNIQUE_LOCK_H
 #define LLVM_SUPPORT_UNIQUE_LOCK_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <cassert>
 
 namespace llvm {

include/llvm/Support/Valgrind.h

@@ -16,6 +16,8 @@
 #ifndef LLVM_SUPPORT_VALGRIND_H
 #define LLVM_SUPPORT_VALGRIND_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <cstddef>
 
 namespace llvm {

include/llvm/Support/WindowsError.h

@@ -10,6 +10,8 @@
 #ifndef LLVM_SUPPORT_WINDOWSERROR_H
 #define LLVM_SUPPORT_WINDOWSERROR_H
 
+#include "llvm/Config/indexstoredb-prefix.h"
+
 #include <system_error>
 
 namespace llvm {