95 lines · cpp
1//===-- HostInfoAndroid.cpp -----------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "lldb/Host/android/HostInfoAndroid.h"10#include "lldb/Host/FileSystem.h"11#include "lldb/Host/linux/HostInfoLinux.h"12#include "llvm/ADT/SmallVector.h"13#include "llvm/ADT/StringRef.h"14 15using namespace lldb_private;16using namespace llvm;17 18void HostInfoAndroid::ComputeHostArchitectureSupport(ArchSpec &arch_32,19 ArchSpec &arch_64) {20 HostInfoLinux::ComputeHostArchitectureSupport(arch_32, arch_64);21 22 if (arch_32.IsValid()) {23 arch_32.GetTriple().setEnvironment(llvm::Triple::Android);24 }25 if (arch_64.IsValid()) {26 arch_64.GetTriple().setEnvironment(llvm::Triple::Android);27 }28}29 30FileSpec HostInfoAndroid::GetDefaultShell() {31 return FileSpec("/system/bin/sh");32}33 34FileSpec HostInfoAndroid::ResolveLibraryPath(const std::string &module_path,35 const ArchSpec &arch) {36 static const char *const ld_library_path_separator = ":";37 static const char *const default_lib32_path[] = {"/vendor/lib", "/system/lib",38 nullptr};39 static const char *const default_lib64_path[] = {"/vendor/lib64",40 "/system/lib64", nullptr};41 42 if (module_path.empty() || module_path[0] == '/') {43 FileSpec file_spec(module_path.c_str());44 FileSystem::Instance().Resolve(file_spec);45 return file_spec;46 }47 48 SmallVector<StringRef, 4> ld_paths;49 50 if (const char *ld_library_path = ::getenv("LD_LIBRARY_PATH"))51 StringRef(ld_library_path)52 .split(ld_paths, StringRef(ld_library_path_separator), -1, false);53 54 const char *const *default_lib_path = nullptr;55 switch (arch.GetAddressByteSize()) {56 case 4:57 default_lib_path = default_lib32_path;58 break;59 case 8:60 default_lib_path = default_lib64_path;61 break;62 default:63 assert(false && "Unknown address byte size");64 return FileSpec();65 }66 67 for (const char *const *it = default_lib_path; *it; ++it)68 ld_paths.push_back(StringRef(*it));69 70 for (const StringRef &path : ld_paths) {71 FileSpec file_candidate(path.str().c_str());72 FileSystem::Instance().Resolve(file_candidate);73 file_candidate.AppendPathComponent(module_path.c_str());74 75 if (FileSystem::Instance().Exists(file_candidate))76 return file_candidate;77 }78 79 return FileSpec();80}81 82bool HostInfoAndroid::ComputeTempFileBaseDirectory(FileSpec &file_spec) {83 bool success = HostInfoLinux::ComputeTempFileBaseDirectory(file_spec);84 85 // On Android, there is no path which is guaranteed to be writable. If the86 // user has not provided a path via an environment variable, the generic87 // algorithm will deduce /tmp, which is plain wrong. In that case we have an88 // invalid directory, we substitute the path with /data/local/tmp, which is89 // correct at least in some cases (i.e., when running as shell user).90 if (!success || !FileSystem::Instance().Exists(file_spec))91 file_spec = FileSpec("/data/local/tmp");92 93 return FileSystem::Instance().Exists(file_spec);94}95