457eb05db6
GetDeveloperDirectory returns a const char* which is NULL when we cannot find the developer directory. This crashes in PlatformDarwinKernel::CollectKextAndKernelDirectories because we're unconditionally assigning it to a std::string. Coincidentally I just refactored a bunch of code in PlatformMacOSX so instead of a ad-hoc fix I've reimplemented the method based on GetXcodeContentsDirectory. The change is mostly NFC. Obviously it fixes the crash, but it also removes support for finding the Xcode directory through he legacy $XCODE_SELECT_PREFIX_DIR/usr/share/xcode-select/xcode_dir_path. Differential revision: https://reviews.llvm.org/D76938
387 lines
13 KiB
C++
387 lines
13 KiB
C++
//===-- PlatformAppleWatchSimulator.cpp -----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "PlatformAppleWatchSimulator.h"
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Core/ModuleSpec.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Utility/ArchSpec.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/ProcessInfo.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/StreamString.h"
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using namespace lldb;
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using namespace lldb_private;
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namespace lldb_private {
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class Process;
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}
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// Static Variables
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static uint32_t g_initialize_count = 0;
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// Static Functions
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void PlatformAppleWatchSimulator::Initialize() {
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PlatformDarwin::Initialize();
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if (g_initialize_count++ == 0) {
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PluginManager::RegisterPlugin(
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PlatformAppleWatchSimulator::GetPluginNameStatic(),
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PlatformAppleWatchSimulator::GetDescriptionStatic(),
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PlatformAppleWatchSimulator::CreateInstance);
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}
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}
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void PlatformAppleWatchSimulator::Terminate() {
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if (g_initialize_count > 0) {
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if (--g_initialize_count == 0) {
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PluginManager::UnregisterPlugin(
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PlatformAppleWatchSimulator::CreateInstance);
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}
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}
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PlatformDarwin::Terminate();
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}
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PlatformSP PlatformAppleWatchSimulator::CreateInstance(bool force,
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const ArchSpec *arch) {
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Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
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if (log) {
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const char *arch_name;
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if (arch && arch->GetArchitectureName())
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arch_name = arch->GetArchitectureName();
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else
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arch_name = "<null>";
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const char *triple_cstr =
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arch ? arch->GetTriple().getTriple().c_str() : "<null>";
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LLDB_LOGF(log, "PlatformAppleWatchSimulator::%s(force=%s, arch={%s,%s})",
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__FUNCTION__, force ? "true" : "false", arch_name, triple_cstr);
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}
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bool create = force;
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if (!create && arch && arch->IsValid()) {
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switch (arch->GetMachine()) {
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case llvm::Triple::x86_64: {
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const llvm::Triple &triple = arch->GetTriple();
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switch (triple.getVendor()) {
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case llvm::Triple::Apple:
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create = true;
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break;
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#if defined(__APPLE__)
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// Only accept "unknown" for the vendor if the host is Apple and it
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// "unknown" wasn't specified (it was just returned because it was NOT
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// specified)
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case llvm::Triple::UnknownVendor:
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create = !arch->TripleVendorWasSpecified();
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break;
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#endif
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default:
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break;
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}
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if (create) {
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switch (triple.getOS()) {
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case llvm::Triple::WatchOS:
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break;
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#if defined(__APPLE__)
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// Only accept "unknown" for the OS if the host is Apple and it
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// "unknown" wasn't specified (it was just returned because it was NOT
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// specified)
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case llvm::Triple::UnknownOS:
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create = !arch->TripleOSWasSpecified();
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break;
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#endif
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default:
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create = false;
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break;
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}
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}
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} break;
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default:
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break;
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}
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}
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if (create) {
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LLDB_LOGF(log, "PlatformAppleWatchSimulator::%s() creating platform",
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__FUNCTION__);
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return PlatformSP(new PlatformAppleWatchSimulator());
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}
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LLDB_LOGF(log,
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"PlatformAppleWatchSimulator::%s() aborting creation of platform",
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__FUNCTION__);
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return PlatformSP();
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}
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lldb_private::ConstString PlatformAppleWatchSimulator::GetPluginNameStatic() {
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static ConstString g_name("watchos-simulator");
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return g_name;
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}
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const char *PlatformAppleWatchSimulator::GetDescriptionStatic() {
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return "Apple Watch simulator platform plug-in.";
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}
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/// Default Constructor
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PlatformAppleWatchSimulator::PlatformAppleWatchSimulator()
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: PlatformDarwin(true), m_sdk_directory() {}
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/// Destructor.
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///
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/// The destructor is virtual since this class is designed to be
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/// inherited from by the plug-in instance.
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PlatformAppleWatchSimulator::~PlatformAppleWatchSimulator() {}
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void PlatformAppleWatchSimulator::GetStatus(Stream &strm) {
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Platform::GetStatus(strm);
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const char *sdk_directory = GetSDKDirectoryAsCString();
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if (sdk_directory)
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strm.Printf(" SDK Path: \"%s\"\n", sdk_directory);
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else
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strm.PutCString(" SDK Path: error: unable to locate SDK\n");
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}
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Status PlatformAppleWatchSimulator::ResolveExecutable(
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const ModuleSpec &module_spec, lldb::ModuleSP &exe_module_sp,
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const FileSpecList *module_search_paths_ptr) {
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Status error;
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// Nothing special to do here, just use the actual file and architecture
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ModuleSpec resolved_module_spec(module_spec);
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// If we have "ls" as the exe_file, resolve the executable loation based on
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// the current path variables
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// TODO: resolve bare executables in the Platform SDK
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// if (!resolved_exe_file.Exists())
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// resolved_exe_file.ResolveExecutableLocation ();
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// Resolve any executable within a bundle on MacOSX
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// TODO: verify that this handles shallow bundles, if not then implement one
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// ourselves
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Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec());
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if (FileSystem::Instance().Exists(resolved_module_spec.GetFileSpec())) {
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if (resolved_module_spec.GetArchitecture().IsValid()) {
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error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
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NULL, NULL, NULL);
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if (exe_module_sp && exe_module_sp->GetObjectFile())
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return error;
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exe_module_sp.reset();
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}
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// No valid architecture was specified or the exact ARM slice wasn't found
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// so ask the platform for the architectures that we should be using (in
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// the correct order) and see if we can find a match that way
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StreamString arch_names;
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ArchSpec platform_arch;
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for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
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idx, resolved_module_spec.GetArchitecture());
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++idx) {
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// Only match x86 with x86 and x86_64 with x86_64...
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if (!module_spec.GetArchitecture().IsValid() ||
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module_spec.GetArchitecture().GetCore() ==
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resolved_module_spec.GetArchitecture().GetCore()) {
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error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
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NULL, NULL, NULL);
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// Did we find an executable using one of the
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if (error.Success()) {
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if (exe_module_sp && exe_module_sp->GetObjectFile())
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break;
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else
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error.SetErrorToGenericError();
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}
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if (idx > 0)
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arch_names.PutCString(", ");
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arch_names.PutCString(platform_arch.GetArchitectureName());
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}
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}
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if (error.Fail() || !exe_module_sp) {
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if (FileSystem::Instance().Readable(resolved_module_spec.GetFileSpec())) {
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error.SetErrorStringWithFormat(
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"'%s' doesn't contain any '%s' platform architectures: %s",
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resolved_module_spec.GetFileSpec().GetPath().c_str(),
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GetPluginName().GetCString(), arch_names.GetString().str().c_str());
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} else {
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error.SetErrorStringWithFormat(
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"'%s' is not readable",
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resolved_module_spec.GetFileSpec().GetPath().c_str());
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}
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}
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} else {
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error.SetErrorStringWithFormat("'%s' does not exist",
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module_spec.GetFileSpec().GetPath().c_str());
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}
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return error;
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}
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static FileSystem::EnumerateDirectoryResult
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EnumerateDirectoryCallback(void *baton, llvm::sys::fs::file_type ft,
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llvm::StringRef path) {
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if (ft == llvm::sys::fs::file_type::directory_file) {
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FileSpec file_spec(path);
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const char *filename = file_spec.GetFilename().GetCString();
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if (filename &&
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strncmp(filename, "AppleWatchSimulator",
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strlen("AppleWatchSimulator")) == 0) {
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::snprintf((char *)baton, PATH_MAX, "%s", filename);
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return FileSystem::eEnumerateDirectoryResultQuit;
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}
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}
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return FileSystem::eEnumerateDirectoryResultNext;
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}
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const char *PlatformAppleWatchSimulator::GetSDKDirectoryAsCString() {
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std::lock_guard<std::mutex> guard(m_sdk_dir_mutex);
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if (m_sdk_directory.empty()) {
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if (FileSpec fspec = GetXcodeDeveloperDirectory()) {
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std::string developer_dir = fspec.GetPath();
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char sdks_directory[PATH_MAX];
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char sdk_dirname[PATH_MAX];
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sdk_dirname[0] = '\0';
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snprintf(sdks_directory, sizeof(sdks_directory),
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"%s/Platforms/AppleWatchSimulator.platform/Developer/SDKs",
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developer_dir.c_str());
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FileSpec simulator_sdk_spec;
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bool find_directories = true;
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bool find_files = false;
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bool find_other = false;
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FileSystem::Instance().EnumerateDirectory(
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sdks_directory, find_directories, find_files, find_other,
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EnumerateDirectoryCallback, sdk_dirname);
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if (sdk_dirname[0]) {
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m_sdk_directory = sdks_directory;
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m_sdk_directory.append(1, '/');
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m_sdk_directory.append(sdk_dirname);
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return m_sdk_directory.c_str();
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}
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}
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// Assign a single NULL character so we know we tried to find the device
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// support directory and we don't keep trying to find it over and over.
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m_sdk_directory.assign(1, '\0');
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}
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// We should have put a single NULL character into m_sdk_directory or it
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// should have a valid path if the code gets here
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assert(m_sdk_directory.empty() == false);
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if (m_sdk_directory[0])
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return m_sdk_directory.c_str();
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return NULL;
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}
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Status PlatformAppleWatchSimulator::GetSymbolFile(const FileSpec &platform_file,
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const UUID *uuid_ptr,
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FileSpec &local_file) {
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Status error;
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char platform_file_path[PATH_MAX];
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if (platform_file.GetPath(platform_file_path, sizeof(platform_file_path))) {
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char resolved_path[PATH_MAX];
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const char *sdk_dir = GetSDKDirectoryAsCString();
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if (sdk_dir) {
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::snprintf(resolved_path, sizeof(resolved_path), "%s/%s", sdk_dir,
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platform_file_path);
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// First try in the SDK and see if the file is in there
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local_file.SetFile(resolved_path, FileSpec::Style::native);
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FileSystem::Instance().Resolve(local_file);
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if (FileSystem::Instance().Exists(local_file))
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return error;
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// Else fall back to the actual path itself
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local_file.SetFile(platform_file_path, FileSpec::Style::native);
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FileSystem::Instance().Resolve(local_file);
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if (FileSystem::Instance().Exists(local_file))
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return error;
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}
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error.SetErrorStringWithFormat(
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"unable to locate a platform file for '%s' in platform '%s'",
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platform_file_path, GetPluginName().GetCString());
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} else {
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error.SetErrorString("invalid platform file argument");
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}
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return error;
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}
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Status PlatformAppleWatchSimulator::GetSharedModule(
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const ModuleSpec &module_spec, lldb_private::Process *process,
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ModuleSP &module_sp, const FileSpecList *module_search_paths_ptr,
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ModuleSP *old_module_sp_ptr, bool *did_create_ptr) {
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// For AppleWatch, the SDK files are all cached locally on the host system.
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// So first we ask for the file in the cached SDK, then we attempt to get a
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// shared module for the right architecture with the right UUID.
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Status error;
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ModuleSpec platform_module_spec(module_spec);
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const FileSpec &platform_file = module_spec.GetFileSpec();
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error = GetSymbolFile(platform_file, module_spec.GetUUIDPtr(),
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platform_module_spec.GetFileSpec());
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if (error.Success()) {
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error = ResolveExecutable(platform_module_spec, module_sp,
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module_search_paths_ptr);
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} else {
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const bool always_create = false;
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error = ModuleList::GetSharedModule(
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module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
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did_create_ptr, always_create);
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}
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if (module_sp)
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module_sp->SetPlatformFileSpec(platform_file);
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return error;
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}
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uint32_t PlatformAppleWatchSimulator::FindProcesses(
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const ProcessInstanceInfoMatch &match_info,
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ProcessInstanceInfoList &process_infos) {
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ProcessInstanceInfoList all_osx_process_infos;
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// First we get all OSX processes
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const uint32_t n = Host::FindProcesses(match_info, all_osx_process_infos);
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// Now we filter them down to only the WatchOS triples
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for (uint32_t i = 0; i < n; ++i) {
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const ProcessInstanceInfo &proc_info = all_osx_process_infos[i];
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if (proc_info.GetArchitecture().GetTriple().getOS() ==
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llvm::Triple::WatchOS) {
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process_infos.push_back(proc_info);
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}
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}
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return process_infos.size();
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}
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bool PlatformAppleWatchSimulator::GetSupportedArchitectureAtIndex(
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uint32_t idx, ArchSpec &arch) {
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static const ArchSpec platform_arch(
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HostInfo::GetArchitecture(HostInfo::eArchKind64));
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if (idx == 0) {
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arch = platform_arch;
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if (arch.IsValid()) {
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arch.GetTriple().setOS(llvm::Triple::WatchOS);
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return true;
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}
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}
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return false;
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}
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