https://github.com/AlexeyMerzlyakov created
https://github.com/llvm/llvm-project/pull/93297
The PR adds the support of CoreDump debugging for RISC-V 64. It implements new
`RegisterContextCorePOSIX_riscv64` class.
Also, the contribution fixes `GetRegisterCount()` -> `GetRegisterSetCount()`
misprint in `RegisterContextPOSIX_riscv64::GetRegisterSetCount()` method, which
leaded to `set && "Register set should be valid."` assertion during `register
info aX` command call.
The patch was tested (on coredumps generated for simple Integer/FP calculation
code) for _cross x86_64 -> RISCV_ and _native RISCV_ LLDB builds. There were
performed basic LLDB functionality tests, such as:
- CoreDump file load
- Backtrace / frames
- GP/FP registers read/info/list
- Basic switch between threads
- Disassembler code
- Memory regions read / display
>From 9d375865a1dcbf706e2d02283072bfd0b41db410 Mon Sep 17 00:00:00 2001
From: Alexey Merzlyakov <alexey.merzlya...@samsung.com>
Date: Fri, 24 May 2024 11:54:16 +0300
Subject: [PATCH] Add RegisterContextPOSIXCore for RISC-V 64
Fix GetRegisterSetCount() method name misprint for RegisterContextPOSIX_riscv64
---
.../Utility/RegisterContextPOSIX_riscv64.cpp | 2 +-
.../Plugins/Process/elf-core/CMakeLists.txt | 1 +
.../RegisterContextPOSIXCore_riscv64.cpp | 84 +++++++++++++++++++
.../RegisterContextPOSIXCore_riscv64.h | 60 +++++++++++++
.../Process/elf-core/ThreadElfCore.cpp | 8 +-
5 files changed, 153 insertions(+), 2 deletions(-)
create mode 100644
lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.cpp
create mode 100644
lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.h
diff --git
a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_riscv64.cpp
b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_riscv64.cpp
index 1834a94dc0260..035ce00e11626 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_riscv64.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_riscv64.cpp
@@ -58,7 +58,7 @@ RegisterContextPOSIX_riscv64::GetRegisterInfoAtIndex(size_t
reg) {
}
size_t RegisterContextPOSIX_riscv64::GetRegisterSetCount() {
- return m_register_info_up->GetRegisterCount();
+ return m_register_info_up->GetRegisterSetCount();
}
const lldb_private::RegisterSet *
diff --git a/lldb/source/Plugins/Process/elf-core/CMakeLists.txt
b/lldb/source/Plugins/Process/elf-core/CMakeLists.txt
index 8ddc671e3ae66..72925c835b5c8 100644
--- a/lldb/source/Plugins/Process/elf-core/CMakeLists.txt
+++ b/lldb/source/Plugins/Process/elf-core/CMakeLists.txt
@@ -9,6 +9,7 @@ add_lldb_library(lldbPluginProcessElfCore PLUGIN
RegisterContextPOSIXCore_ppc64le.cpp
RegisterContextPOSIXCore_s390x.cpp
RegisterContextPOSIXCore_x86_64.cpp
+ RegisterContextPOSIXCore_riscv64.cpp
RegisterUtilities.cpp
LINK_LIBS
diff --git
a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.cpp
b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.cpp
new file mode 100644
index 0000000000000..b0fd065e7cc62
--- /dev/null
+++ b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.cpp
@@ -0,0 +1,84 @@
+//===-- RegisterContextCorePOSIX_riscv64.cpp
------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "RegisterContextPOSIXCore_riscv64.h"
+
+#include "lldb/Utility/DataBufferHeap.h"
+
+using namespace lldb_private;
+
+std::unique_ptr<RegisterContextCorePOSIX_riscv64>
+RegisterContextCorePOSIX_riscv64::Create(
+ lldb_private::Thread &thread, const lldb_private::ArchSpec &arch,
+ const lldb_private::DataExtractor &gpregset,
+ llvm::ArrayRef<lldb_private::CoreNote> notes) {
+ Flags flags = 0;
+
+ auto register_info_up =
+ std::make_unique<RegisterInfoPOSIX_riscv64>(arch, flags);
+ return std::unique_ptr<RegisterContextCorePOSIX_riscv64>(
+ new RegisterContextCorePOSIX_riscv64(thread, std::move(register_info_up),
+ gpregset, notes));
+}
+
+RegisterContextCorePOSIX_riscv64::RegisterContextCorePOSIX_riscv64(
+ Thread &thread, std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,
+ const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
+ : RegisterContextPOSIX_riscv64(thread, std::move(register_info)) {
+
+ m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
+ gpregset.GetByteSize());
+ m_gpr.SetData(m_gpr_buffer);
+ m_gpr.SetByteOrder(gpregset.GetByteOrder());
+
+ ArchSpec arch = m_register_info_up->GetTargetArchitecture();
+ DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
+ m_fpr_buffer = std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
+ fpregset.GetByteSize());
+ m_fpr.SetData(m_fpr_buffer);
+ m_fpr.SetByteOrder(fpregset.GetByteOrder());
+}
+
+RegisterContextCorePOSIX_riscv64::~RegisterContextCorePOSIX_riscv64() =
default;
+
+bool RegisterContextCorePOSIX_riscv64::ReadGPR() { return true; }
+
+bool RegisterContextCorePOSIX_riscv64::ReadFPR() { return true; }
+
+bool RegisterContextCorePOSIX_riscv64::WriteGPR() {
+ assert(0);
+ return false;
+}
+
+bool RegisterContextCorePOSIX_riscv64::WriteFPR() {
+ assert(0);
+ return false;
+}
+
+bool RegisterContextCorePOSIX_riscv64::ReadRegister(
+ const RegisterInfo *reg_info, RegisterValue &value) {
+ const uint8_t *src = nullptr;
+ lldb::offset_t offset = reg_info->byte_offset;
+
+ if (IsGPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
+ src = m_gpr.GetDataStart();
+ } else { // IsFPR
+ src = m_fpr.GetDataStart();
+ offset -= GetGPRSize();
+ }
+
+ Status error;
+ value.SetFromMemoryData(*reg_info, src + offset, reg_info->byte_size,
+ lldb::eByteOrderLittle, error);
+ return error.Success();
+}
+
+bool RegisterContextCorePOSIX_riscv64::WriteRegister(
+ const RegisterInfo *reg_info, const RegisterValue &value) {
+ return false;
+}
diff --git
a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.h
b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.h
new file mode 100644
index 0000000000000..3cf9531df2c1d
--- /dev/null
+++ b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_riscv64.h
@@ -0,0 +1,60 @@
+//===-- RegisterContextPOSIXCore_riscv64.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 LLDB_SOURCE_PLUGINS_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_RISCV64_H
+#define LLDB_SOURCE_PLUGINS_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_RISCV64_H
+
+#include "Plugins/Process/Utility/RegisterContextPOSIX_riscv64.h"
+#include "Plugins/Process/Utility/RegisterInfoPOSIX_riscv64.h"
+
+#include "Plugins/Process/elf-core/RegisterUtilities.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/RegisterValue.h"
+
+#include <memory>
+
+class RegisterContextCorePOSIX_riscv64 : public RegisterContextPOSIX_riscv64 {
+public:
+ static std::unique_ptr<RegisterContextCorePOSIX_riscv64>
+ Create(lldb_private::Thread &thread, const lldb_private::ArchSpec &arch,
+ const lldb_private::DataExtractor &gpregset,
+ llvm::ArrayRef<lldb_private::CoreNote> notes);
+
+ ~RegisterContextCorePOSIX_riscv64() override;
+
+ bool ReadRegister(const lldb_private::RegisterInfo *reg_info,
+ lldb_private::RegisterValue &value) override;
+
+ bool WriteRegister(const lldb_private::RegisterInfo *reg_info,
+ const lldb_private::RegisterValue &value) override;
+
+protected:
+ RegisterContextCorePOSIX_riscv64(
+ lldb_private::Thread &thread,
+ std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,
+ const lldb_private::DataExtractor &gpregset,
+ llvm::ArrayRef<lldb_private::CoreNote> notes);
+
+ bool ReadGPR() override;
+
+ bool ReadFPR() override;
+
+ bool WriteGPR() override;
+
+ bool WriteFPR() override;
+
+private:
+ lldb::DataBufferSP m_gpr_buffer;
+ lldb::DataBufferSP m_fpr_buffer;
+
+ lldb_private::DataExtractor m_gpr;
+ lldb_private::DataExtractor m_fpr;
+};
+
+#endif //
LLDB_SOURCE_PLUGINS_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_RISCV64_H
diff --git a/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
b/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
index 3ce2a4a5c3fa4..2a83163884e16 100644
--- a/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
+++ b/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
@@ -35,6 +35,7 @@
#include "RegisterContextPOSIXCore_mips64.h"
#include "RegisterContextPOSIXCore_powerpc.h"
#include "RegisterContextPOSIXCore_ppc64le.h"
+#include "RegisterContextPOSIXCore_riscv64.h"
#include "RegisterContextPOSIXCore_s390x.h"
#include "RegisterContextPOSIXCore_x86_64.h"
#include "ThreadElfCore.h"
@@ -168,7 +169,8 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame
*frame) {
}
if (!reg_interface && arch.GetMachine() != llvm::Triple::aarch64 &&
- arch.GetMachine() != llvm::Triple::arm) {
+ arch.GetMachine() != llvm::Triple::arm &&
+ arch.GetMachine() != llvm::Triple::riscv64) {
LLDB_LOGF(log, "elf-core::%s:: Architecture(%d) or OS(%d) not supported",
__FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS());
assert(false && "Architecture or OS not supported");
@@ -184,6 +186,10 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame
*frame) {
*this, std::make_unique<RegisterInfoPOSIX_arm>(arch),
m_gpregset_data,
m_notes);
break;
+ case llvm::Triple::riscv64:
+ m_thread_reg_ctx_sp = RegisterContextCorePOSIX_riscv64::Create(
+ *this, arch, m_gpregset_data, m_notes);
+ break;
case llvm::Triple::mipsel:
case llvm::Triple::mips:
m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_mips64>(
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