9379d19ff8
Summary: At the moment, when trying to import the `std` module in LLDB, we look at the imported modules used in the compiled program and try to infer the Clang configuration we need from the DWARF module-import. That was the initial idea but turned out to cause a few problems or inconveniences: * It requires that users compile their programs with C++ modules. Given how experimental C++ modules are makes this feature inaccessible for many users. Also it means that people can't just get the benefits of this feature for free when we activate it by default (and we can't just close all the associated bug reports). * Relying on DWARF's imported module tags (that are only emitted by default on macOS) means this can only be used when using DWARF (and with -glldb on Linux). * We essentially hardcoded the C standard library paths on some platforms (Linux) or just couldn't support this feature on other platforms (macOS). This patch drops the whole idea of looking at the imported module DWARF tags and instead just uses the support files of the compilation unit. If we look at the support files and see file paths that indicate where the C standard library and libc++ are, we can just create the module configuration this information. This fixes all the problems above which means we can enable all the tests now on Linux, macOS and with other debug information than what we currently had. The only debug information specific code is now the iteration over external type module when -gmodules is used (as `std` and also the `Darwin` module are their own external type module with their own files). The meat of this patch is the CppModuleConfiguration which looks at the file paths from the compilation unit and then figures out the include paths based on those paths. It's quite conservative in that it only enables modules if we find a single C library and single libc++ library. It's still missing some test mode where we try to compile an expression before we actually activate the config for the user (which probably also needs some caching mechanism), but for now it works and makes the feature usable. Reviewers: aprantl, shafik, jdoerfert Reviewed By: aprantl Subscribers: mgorny, abidh, JDevlieghere, lldb-commits Tags: #c_modules_in_lldb, #lldb Differential Revision: https://reviews.llvm.org/D67760 llvm-svn: 372716
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
//===-- PlatformLinux.h -----------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef liblldb_PlatformLinux_h_
|
|
#define liblldb_PlatformLinux_h_
|
|
|
|
#include "Plugins/Platform/POSIX/PlatformPOSIX.h"
|
|
|
|
namespace lldb_private {
|
|
namespace platform_linux {
|
|
|
|
class PlatformLinux : public PlatformPOSIX {
|
|
public:
|
|
PlatformLinux(bool is_host);
|
|
|
|
~PlatformLinux() override;
|
|
|
|
static void Initialize();
|
|
|
|
static void Terminate();
|
|
|
|
// lldb_private::PluginInterface functions
|
|
static lldb::PlatformSP CreateInstance(bool force, const ArchSpec *arch);
|
|
|
|
static ConstString GetPluginNameStatic(bool is_host);
|
|
|
|
static const char *GetPluginDescriptionStatic(bool is_host);
|
|
|
|
ConstString GetPluginName() override;
|
|
|
|
uint32_t GetPluginVersion() override { return 1; }
|
|
|
|
// lldb_private::Platform functions
|
|
const char *GetDescription() override {
|
|
return GetPluginDescriptionStatic(IsHost());
|
|
}
|
|
|
|
void GetStatus(Stream &strm) override;
|
|
|
|
bool GetSupportedArchitectureAtIndex(uint32_t idx, ArchSpec &arch) override;
|
|
|
|
int32_t GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) override;
|
|
|
|
bool CanDebugProcess() override;
|
|
|
|
lldb::ProcessSP DebugProcess(ProcessLaunchInfo &launch_info,
|
|
Debugger &debugger, Target *target,
|
|
Status &error) override;
|
|
|
|
void CalculateTrapHandlerSymbolNames() override;
|
|
|
|
MmapArgList GetMmapArgumentList(const ArchSpec &arch, lldb::addr_t addr,
|
|
lldb::addr_t length, unsigned prot,
|
|
unsigned flags, lldb::addr_t fd,
|
|
lldb::addr_t offset) override;
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(PlatformLinux);
|
|
};
|
|
|
|
} // namespace platform_linux
|
|
} // namespace lldb_private
|
|
|
|
#endif // liblldb_PlatformLinux_h_
|