Author: Pavel Labath Date: 2025-04-29T08:20:08+02:00 New Revision: 679cc0a1ed60ea529abc04cecbcdd75d65ea0588
URL: https://github.com/llvm/llvm-project/commit/679cc0a1ed60ea529abc04cecbcdd75d65ea0588 DIFF: https://github.com/llvm/llvm-project/commit/679cc0a1ed60ea529abc04cecbcdd75d65ea0588.diff LOG: [lldb] Remove Function null checks in Block.cpp (#137611) As of #117683, Blocks are always enclosed in a function, so these checks never fail. We can't change the signature of `CalculateSymbolContextFunction` as it's an abstract function (and some of its implementations can return nullptr), but we can create a different function that we can call when we know we're dealing with a block. Added: Modified: lldb/include/lldb/Symbol/Block.h lldb/source/Symbol/Block.cpp Removed: ################################################################################ diff --git a/lldb/include/lldb/Symbol/Block.h b/lldb/include/lldb/Symbol/Block.h index d0063f132cc0f..501c912b674ac 100644 --- a/lldb/include/lldb/Symbol/Block.h +++ b/lldb/include/lldb/Symbol/Block.h @@ -78,6 +78,8 @@ class Block : public UserID, public SymbolContextScope { Block *CalculateSymbolContextBlock() override; + Function &GetFunction(); + /// Check if an offset is in one of the block offset ranges. /// /// \param[in] range_offset diff --git a/lldb/source/Symbol/Block.cpp b/lldb/source/Symbol/Block.cpp index 6ecc988d7a5a9..9d01293ea64e0 100644 --- a/lldb/source/Symbol/Block.cpp +++ b/lldb/source/Symbol/Block.cpp @@ -153,10 +153,16 @@ Function *Block::CalculateSymbolContextFunction() { Block *Block::CalculateSymbolContextBlock() { return this; } -void Block::DumpSymbolContext(Stream *s) { +Function &Block::GetFunction() { + // Blocks always have an enclosing function because their parent is either a + // function or a block (which has a parent, inductively). Function *function = CalculateSymbolContextFunction(); - if (function) - function->DumpSymbolContext(s); + assert(function); + return *function; +} + +void Block::DumpSymbolContext(Stream *s) { + GetFunction().DumpSymbolContext(s); s->Printf(", Block{0x%8.8" PRIx64 "}", GetID()); } @@ -241,20 +247,17 @@ bool Block::GetRangeContainingOffset(const addr_t offset, Range &range) { bool Block::GetRangeContainingAddress(const Address &addr, AddressRange &range) { - Function *function = CalculateSymbolContextFunction(); - if (function) { - if (uint32_t idx = GetRangeIndexContainingAddress(addr); - idx != UINT32_MAX) { - const Range *range_ptr = m_ranges.GetEntryAtIndex(idx); - assert(range_ptr); - - Address func_addr = function->GetAddress(); - range.GetBaseAddress() = - Address(func_addr.GetFileAddress() + range_ptr->GetRangeBase(), - func_addr.GetModule()->GetSectionList()); - range.SetByteSize(range_ptr->GetByteSize()); - return true; - } + Function &function = GetFunction(); + if (uint32_t idx = GetRangeIndexContainingAddress(addr); idx != UINT32_MAX) { + const Range *range_ptr = m_ranges.GetEntryAtIndex(idx); + assert(range_ptr); + + Address func_addr = function.GetAddress(); + range.GetBaseAddress() = + Address(func_addr.GetFileAddress() + range_ptr->GetRangeBase(), + func_addr.GetModule()->GetSectionList()); + range.SetByteSize(range_ptr->GetByteSize()); + return true; } range.Clear(); return false; @@ -269,11 +272,9 @@ bool Block::GetRangeContainingLoadAddress(lldb::addr_t load_addr, } uint32_t Block::GetRangeIndexContainingAddress(const Address &addr) { - Function *function = CalculateSymbolContextFunction(); - if (!function) - return UINT32_MAX; + Function &function = GetFunction(); - const Address &func_addr = function->GetAddress(); + const Address &func_addr = function.GetAddress(); if (addr.GetModule() != func_addr.GetModule()) return UINT32_MAX; @@ -283,29 +284,25 @@ uint32_t Block::GetRangeIndexContainingAddress(const Address &addr) { } bool Block::GetRangeAtIndex(uint32_t range_idx, AddressRange &range) { - if (range_idx < m_ranges.GetSize()) { - Function *function = CalculateSymbolContextFunction(); - if (function) { - const Range &vm_range = m_ranges.GetEntryRef(range_idx); - range.GetBaseAddress() = function->GetAddress(); - range.GetBaseAddress().Slide(vm_range.GetRangeBase()); - range.SetByteSize(vm_range.GetByteSize()); - return true; - } - } - return false; + if (range_idx >= m_ranges.GetSize()) + return false; + + Function &function = GetFunction(); + const Range &vm_range = m_ranges.GetEntryRef(range_idx); + range.GetBaseAddress() = function.GetAddress(); + range.GetBaseAddress().Slide(vm_range.GetRangeBase()); + range.SetByteSize(vm_range.GetByteSize()); + return true; } AddressRanges Block::GetRanges() { AddressRanges ranges; - Function *function = CalculateSymbolContextFunction(); - if (!function) - return ranges; + Function &function = GetFunction(); for (size_t i = 0, e = m_ranges.GetSize(); i < e; ++i) { ranges.emplace_back(); auto &range = ranges.back(); const Range &vm_range = m_ranges.GetEntryRef(i); - range.GetBaseAddress() = function->GetAddress(); + range.GetBaseAddress() = function.GetAddress(); range.GetBaseAddress().Slide(vm_range.GetRangeBase()); range.SetByteSize(vm_range.GetByteSize()); } @@ -316,13 +313,10 @@ bool Block::GetStartAddress(Address &addr) { if (m_ranges.IsEmpty()) return false; - Function *function = CalculateSymbolContextFunction(); - if (function) { - addr = function->GetAddress(); - addr.Slide(m_ranges.GetEntryRef(0).GetRangeBase()); - return true; - } - return false; + Function &function = GetFunction(); + addr = function.GetAddress(); + addr.Slide(m_ranges.GetEntryRef(0).GetRangeBase()); + return true; } void Block::FinalizeRanges() { @@ -336,11 +330,11 @@ void Block::AddRange(const Range &range) { Log *log = GetLog(LLDBLog::Symbols); if (log) { ModuleSP module_sp(m_parent_scope.CalculateSymbolContextModule()); - Function *function = m_parent_scope.CalculateSymbolContextFunction(); - const addr_t function_file_addr = function->GetAddress().GetFileAddress(); + Function &function = GetFunction(); + const addr_t function_file_addr = function.GetAddress().GetFileAddress(); const addr_t block_start_addr = function_file_addr + range.GetRangeBase(); const addr_t block_end_addr = function_file_addr + range.GetRangeEnd(); - Type *func_type = function->GetType(); + Type *func_type = function.GetType(); const Declaration &func_decl = func_type->GetDeclaration(); if (func_decl.GetLine()) { @@ -351,7 +345,7 @@ void Block::AddRange(const Range &range) { "} in function {0x%8.8" PRIx64 "} from %s", func_decl.GetFile().GetPath().c_str(), func_decl.GetLine(), GetID(), (uint32_t)m_ranges.GetSize(), block_start_addr, - block_end_addr, parent_block->GetID(), function->GetID(), + block_end_addr, parent_block->GetID(), function.GetID(), module_sp->GetFileSpec().GetPath().c_str()); } else { LLDB_LOGF(log, @@ -360,7 +354,7 @@ void Block::AddRange(const Range &range) { ") which is not contained in parent block {0x%8.8" PRIx64 "} in function {0x%8.8" PRIx64 "} from %s", GetID(), (uint32_t)m_ranges.GetSize(), block_start_addr, - block_end_addr, parent_block->GetID(), function->GetID(), + block_end_addr, parent_block->GetID(), function.GetID(), module_sp->GetFileSpec().GetPath().c_str()); 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