1 files changed, 104 insertions, 0 deletions
diff --git a/source/Host/android/HostInfoAndroid.cpp b/source/Host/android/HostInfoAndroid.cpp
new file mode 100644
index 0000000000000..3fa50ec8ddfd7
--- /dev/null
+++ b/source/Host/android/HostInfoAndroid.cpp
@@ -0,0 +1,104 @@
+//===-- HostInfoAndroid.cpp -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/android/HostInfoAndroid.h"
+#include "lldb/Host/linux/HostInfoLinux.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+
+using namespace lldb_private;
+using namespace llvm;
+
+void
+HostInfoAndroid::ComputeHostArchitectureSupport(ArchSpec &arch_32, ArchSpec &arch_64)
+{
+    HostInfoLinux::ComputeHostArchitectureSupport(arch_32, arch_64);
+
+    if (arch_32.IsValid())
+    {
+        arch_32.GetTriple().setEnvironment(llvm::Triple::Android);
+    }
+    if (arch_64.IsValid())
+    {
+        arch_64.GetTriple().setEnvironment(llvm::Triple::Android);
+    }
+}
+
+FileSpec
+HostInfoAndroid::GetDefaultShell()
+{
+    return FileSpec("/system/bin/sh", false);
+}
+
+FileSpec
+HostInfoAndroid::ResolveLibraryPath(const std::string& module_path, const ArchSpec& arch)
+{
+    static const char* const ld_library_path_separator = ":";
+    static const char* const default_lib32_path[] = {
+        "/vendor/lib",
+        "/system/lib",
+        nullptr
+    };
+    static const char* const default_lib64_path[] = {
+        "/vendor/lib64",
+        "/system/lib64",
+        nullptr
+    };
+
+    if (module_path.empty() || module_path[0] == '/')
+        return FileSpec(module_path.c_str(), true);
+
+    SmallVector<StringRef, 4> ld_paths;
+
+    if (const char* ld_library_path = ::getenv("LD_LIBRARY_PATH"))
+        StringRef(ld_library_path).split(ld_paths, StringRef(ld_library_path_separator), -1, false);
+
+    const char* const* default_lib_path = nullptr;
+    switch (arch.GetAddressByteSize())
+    {
+        case 4:
+            default_lib_path = default_lib32_path;
+            break;
+        case 8:
+            default_lib_path = default_lib64_path;
+            break;
+        default:
+            assert(false && "Unknown address byte size");
+            return FileSpec();
+    }
+
+    for(const char* const* it = default_lib_path; *it; ++it)
+        ld_paths.push_back(StringRef(*it));
+
+    for (const StringRef& path : ld_paths)
+    {
+        FileSpec file_candidate(path.str().c_str(), true);
+        file_candidate.AppendPathComponent(module_path.c_str());
+
+        if (file_candidate.Exists())
+            return file_candidate;
+    }
+
+    return FileSpec();
+}
+
+bool
+HostInfoAndroid::ComputeTempFileBaseDirectory(FileSpec &file_spec)
+{
+    bool success = HostInfoLinux::ComputeTempFileBaseDirectory(file_spec);
+
+    // On Android, there is no path which is guaranteed to be writable. If the user has not
+    // provided a path via an environment variable, the generic algorithm will deduce /tmp, which
+    // is plain wrong. In that case we have an invalid directory, we substitute the path with
+    // /data/local/tmp, which is correct at least in some cases (i.e., when running as shell user).
+    if (!success || !file_spec.Exists())
+        file_spec = FileSpec("/data/local/tmp", false);
+
+    return file_spec.Exists();
+}