Author: Felipe de Azevedo Piovezan Date: 2025-09-18T10:33:51-07:00 New Revision: 113357f1a8feb0bfa337bb8a0b9d1d6eaa2d4f0f
URL: https://github.com/llvm/llvm-project/commit/113357f1a8feb0bfa337bb8a0b9d1d6eaa2d4f0f DIFF: https://github.com/llvm/llvm-project/commit/113357f1a8feb0bfa337bb8a0b9d1d6eaa2d4f0f.diff LOG: [lldb][nfc] Remove no-op calls to Fix*Address (#159586) The first call, in InitializeNonZerothFrame, is inside a logging branch. For that, it's better to log the real value instead of the fixed one. The second call, inside RegisterContextUnwind::ReadFrameAddress, is computing an address which is then passed to ReadRegisterValueFromMemory, which boils down to a Process::ReadMemory, which fixes the address if it wants to. The current variable names are misleading, making readers believe it is the cfa value itself that is being passed to Fix*Address; that's not the case. This commit renames the variable to make this abundantly clear. Added: Modified: lldb/source/Target/RegisterContextUnwind.cpp Removed: ################################################################################ diff --git a/lldb/source/Target/RegisterContextUnwind.cpp b/lldb/source/Target/RegisterContextUnwind.cpp index 3b018c09b8b72..7f6ead1e7ccab 100644 --- a/lldb/source/Target/RegisterContextUnwind.cpp +++ b/lldb/source/Target/RegisterContextUnwind.cpp @@ -361,16 +361,10 @@ void RegisterContextUnwind::InitializeNonZerothFrame() { if (log) { UnwindLogMsg("pc = 0x%" PRIx64, pc); addr_t reg_val; - if (ReadGPRValue(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP, reg_val)) { - if (abi_sp) - reg_val = abi_sp->FixDataAddress(reg_val); + if (ReadGPRValue(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP, reg_val)) UnwindLogMsg("fp = 0x%" PRIx64, reg_val); - } - if (ReadGPRValue(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, reg_val)) { - if (abi_sp) - reg_val = abi_sp->FixDataAddress(reg_val); + if (ReadGPRValue(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, reg_val)) UnwindLogMsg("sp = 0x%" PRIx64, reg_val); - } } // A pc of 0x0 means it's the end of the stack crawl unless we're above a trap @@ -2026,30 +2020,31 @@ bool RegisterContextUnwind::ReadFrameAddress( switch (fa.GetValueType()) { case UnwindPlan::Row::FAValue::isRegisterDereferenced: { UnwindLogMsg("CFA value via dereferencing reg"); - RegisterNumber cfa_reg(m_thread, row_register_kind, - fa.GetRegisterNumber()); - if (ReadGPRValue(cfa_reg, cfa_reg_contents)) { + RegisterNumber regnum_to_deref(m_thread, row_register_kind, + fa.GetRegisterNumber()); + addr_t reg_to_deref_contents; + if (ReadGPRValue(regnum_to_deref, reg_to_deref_contents)) { const RegisterInfo *reg_info = - GetRegisterInfoAtIndex(cfa_reg.GetAsKind(eRegisterKindLLDB)); + GetRegisterInfoAtIndex(regnum_to_deref.GetAsKind(eRegisterKindLLDB)); RegisterValue reg_value; if (reg_info) { - if (abi_sp) - cfa_reg_contents = abi_sp->FixDataAddress(cfa_reg_contents); Status error = ReadRegisterValueFromMemory( - reg_info, cfa_reg_contents, reg_info->byte_size, reg_value); + reg_info, reg_to_deref_contents, reg_info->byte_size, reg_value); if (error.Success()) { address = reg_value.GetAsUInt64(); UnwindLogMsg( "CFA value via dereferencing reg %s (%d): reg has val 0x%" PRIx64 ", CFA value is 0x%" PRIx64, - cfa_reg.GetName(), cfa_reg.GetAsKind(eRegisterKindLLDB), - cfa_reg_contents, address); + regnum_to_deref.GetName(), + regnum_to_deref.GetAsKind(eRegisterKindLLDB), + reg_to_deref_contents, address); return true; } else { UnwindLogMsg("Tried to deref reg %s (%d) [0x%" PRIx64 "] but memory read failed.", - cfa_reg.GetName(), cfa_reg.GetAsKind(eRegisterKindLLDB), - cfa_reg_contents); + regnum_to_deref.GetName(), + regnum_to_deref.GetAsKind(eRegisterKindLLDB), + reg_to_deref_contents); } } } _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
