forked from OSchip/llvm-project
[BOLT][DWARF] Handle zero size DW_TAG_inlined_subroutine
We were resetting DW_AT_low_pc to zero when DW_AT_high_pc was zero, or DW_AT_low_pc == DW_AT_high_pc. This resulted in LLDB to print error "adding range [0x0-0x0) which has a base that is less than the function's low PC". Changed it so that when this case arises we set DW_AT_low_pc to the start address. Reviewed By: rafauler Differential Revision: https://reviews.llvm.org/D132059
This commit is contained in:
Alexander Yermolovich
parent
28733d86cf
commit
ccbf28b09d
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@ -113,6 +113,7 @@ private:
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uint64_t DebugRangesOffset,
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SimpleBinaryPatcher &DebugInfoPatcher,
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DebugAbbrevWriter &AbbrevWriter,
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uint64_t LowPCToUse,
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Optional<uint64_t> RangesBase = None);
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std::unique_ptr<DebugBufferVector>
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@ -171,6 +172,7 @@ private:
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/// function above.
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void convertToRangesPatchDebugInfo(DWARFDie DIE, uint64_t RangesSectionOffset,
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SimpleBinaryPatcher &DebugInfoPatcher,
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uint64_t LowPCToUse,
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Optional<uint64_t> RangesBase = None);
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/// Helper function for creating and returning per-DWO patchers/writers.
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@ -413,7 +413,7 @@ void DWARFRewriter::updateUnitDebugInfo(
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ARangesSectionWriter->addCURanges(Unit.getOffset(),
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std::move(OutputRanges));
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updateDWARFObjectAddressRanges(DIE, RangesSectionOffset, DebugInfoPatcher,
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AbbrevWriter, RangesBase);
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AbbrevWriter, 0, RangesBase);
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break;
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}
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case dwarf::DW_TAG_subprogram: {
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@ -448,7 +448,7 @@ void DWARFRewriter::updateUnitDebugInfo(
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updateDWARFObjectAddressRanges(
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DIE, RangesSectionWriter.addRanges(FunctionRanges), DebugInfoPatcher,
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AbbrevWriter);
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AbbrevWriter, 0);
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break;
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}
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@ -463,21 +463,34 @@ void DWARFRewriter::updateUnitDebugInfo(
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? BC.getBinaryFunctionContainingAddress(
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RangesOrError->front().LowPC)
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: nullptr;
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DebugAddressRangesVector OutputRanges;
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bool ErrorState = false;
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if (Function) {
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DebugAddressRangesVector OutputRanges =
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Function->translateInputToOutputRanges(*RangesOrError);
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OutputRanges = Function->translateInputToOutputRanges(*RangesOrError);
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LLVM_DEBUG(if (OutputRanges.empty() != RangesOrError->empty()) {
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dbgs() << "BOLT-DEBUG: problem with DIE at 0x"
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<< Twine::utohexstr(DIE.getOffset()) << " in CU at 0x"
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<< Twine::utohexstr(Unit.getOffset()) << '\n';
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});
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RangesSectionOffset = RangesSectionWriter.addRanges(
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std::move(OutputRanges), CachedRanges);
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} else if (!RangesOrError) {
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ErrorState = true;
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consumeError(RangesOrError.takeError());
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}
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uint64_t LowPCToUse = 0;
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if (!ErrorState && RangesOrError.get().size() == 1 &&
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RangesOrError.get().begin()->LowPC ==
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RangesOrError.get().begin()->HighPC) {
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if (!OutputRanges.empty())
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LowPCToUse = OutputRanges.front().LowPC;
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else
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LowPCToUse = RangesOrError.get().begin()->LowPC;
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}
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updateDWARFObjectAddressRanges(DIE, RangesSectionOffset, DebugInfoPatcher,
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AbbrevWriter);
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AbbrevWriter, LowPCToUse);
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break;
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}
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case dwarf::DW_TAG_call_site: {
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@ -779,7 +792,7 @@ void DWARFRewriter::updateUnitDebugInfo(
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void DWARFRewriter::updateDWARFObjectAddressRanges(
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const DWARFDie DIE, uint64_t DebugRangesOffset,
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SimpleBinaryPatcher &DebugInfoPatcher, DebugAbbrevWriter &AbbrevWriter,
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Optional<uint64_t> RangesBase) {
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uint64_t LowPCToUse, Optional<uint64_t> RangesBase) {
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// Some objects don't have an associated DIE and cannot be updated (such as
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// compiler-generated functions).
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@ -841,7 +854,7 @@ void DWARFRewriter::updateDWARFObjectAddressRanges(
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if (LowPCAttrInfo &&
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LowPCAttrInfo->V.getForm() != dwarf::DW_FORM_GNU_addr_index &&
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LowPCAttrInfo->V.getForm() != dwarf::DW_FORM_addrx)
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DebugInfoPatcher.addLE64Patch(LowPCAttrInfo->Offset, 0);
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DebugInfoPatcher.addLE64Patch(LowPCAttrInfo->Offset, LowPCToUse);
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return;
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}
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@ -871,7 +884,7 @@ void DWARFRewriter::updateDWARFObjectAddressRanges(
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convertToRangesPatchAbbrev(*DIE.getDwarfUnit(), AbbreviationDecl,
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AbbrevWriter, RangesBase);
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convertToRangesPatchDebugInfo(DIE, DebugRangesOffset, DebugInfoPatcher,
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RangesBase);
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LowPCToUse, RangesBase);
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} else {
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if (opts::Verbosity >= 1)
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errs() << "BOLT-ERROR: cannot update ranges for DIE at offset 0x"
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@ -1873,7 +1886,8 @@ void DWARFRewriter::convertToRangesPatchAbbrev(
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void DWARFRewriter::convertToRangesPatchDebugInfo(
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DWARFDie DIE, uint64_t RangesSectionOffset,
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SimpleBinaryPatcher &DebugInfoPatcher, Optional<uint64_t> RangesBase) {
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SimpleBinaryPatcher &DebugInfoPatcher, uint64_t LowPCToUse,
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Optional<uint64_t> RangesBase) {
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Optional<AttrInfo> LowPCVal = None;
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Optional<AttrInfo> HighPCVal = None;
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getRangeAttrData(DIE, LowPCVal, HighPCVal);
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@ -1900,10 +1914,10 @@ void DWARFRewriter::convertToRangesPatchDebugInfo(
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// when it's absent.
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if (LowForm == dwarf::DW_FORM_addrx) {
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const uint32_t Index =
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AddrWriter->getIndexFromAddress(0, *DIE.getDwarfUnit());
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AddrWriter->getIndexFromAddress(LowPCToUse, *DIE.getDwarfUnit());
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DebugInfoPatcher.addUDataPatch(LowPCOffset, Index, LowPCVal->Size);
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} else
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DebugInfoPatcher.addLE64Patch(LowPCOffset, 0);
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DebugInfoPatcher.addLE64Patch(LowPCOffset, LowPCToUse);
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// Original CU didn't have DW_AT_*_base. We converted it's children (or
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// dwo), so need to insert it into CU.
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@ -0,0 +1,364 @@
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# REQUIRES: system-linux
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# RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %s -o %tmain.o
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# RUN: %clang %cflags -dwarf-5 %tmain.o -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
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# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=CHECK %s
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# CHECK: DW_TAG_inlined_subroutine
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# CHECK: DW_AT_low_pc [DW_FORM_addr] (0x[[#%.16x,ADDR:]])
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# CHECK: DW_AT_ranges [DW_FORM_sec_offset]
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# CHECK-NEXT: [0x[[#ADDR]], 0x[[#ADDR]])
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# Testing BOLT handles correctly when size of DW_AT_inlined_subroutine is 0.
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# In other words DW_AT_high_pc is 0 or DW_AT_low_pc == DW_AT_high_pc.
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# Modified assembly manually to set DW_AT_high_pc to 0.
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# static int helper(int i) {
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# return ++i;
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# }
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#
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# int main(int argc, char *argv[]) {
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# return helper(argc);
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# }
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.text
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.file "main.cpp"
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.globl _Z6helperi # -- Begin function _Z6helperi
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.p2align 4, 0x90
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.type _Z6helperi,@function
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_Z6helperi: # @_Z6helperi
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.Lfunc_begin0:
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.file 1 "." "main.cpp"
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.loc 1 1 0 # main.cpp:1:0
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.cfi_startproc
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# %bb.0: # %entry
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#DEBUG_VALUE: helper:i <- $edi
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# kill: def $edi killed $edi def $rdi
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.loc 1 2 10 prologue_end # main.cpp:2:10
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leal 1(%rdi), %eax
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.Ltmp0:
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#DEBUG_VALUE: helper:i <- $eax
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.loc 1 2 3 is_stmt 0 # main.cpp:2:3
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retq
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.Ltmp1:
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.Lfunc_end0:
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.size _Z6helperi, .Lfunc_end0-_Z6helperi
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.cfi_endproc
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# -- End function
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.globl main # -- Begin function main
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.p2align 4, 0x90
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.type main,@function
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main: # @main
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.Lfunc_begin1:
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.loc 1 5 0 is_stmt 1 # main.cpp:5:0
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.cfi_startproc
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# %bb.0: # %entry
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#DEBUG_VALUE: main:argc <- $edi
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#DEBUG_VALUE: main:argv <- $rsi
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#DEBUG_VALUE: helper:i <- $edi
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# kill: def $edi killed $edi def $rdi
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.loc 1 2 10 prologue_end # main.cpp:2:10
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leal 1(%rdi), %eax
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.Ltmp2:
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#DEBUG_VALUE: helper:i <- $eax
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.loc 1 6 3 # main.cpp:6:3
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retq
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.Ltmp3:
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.Lfunc_end1:
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.size main, .Lfunc_end1-main
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.cfi_endproc
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# -- End function
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.section .debug_loc,"",@progbits
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.Ldebug_loc0:
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.quad .Lfunc_begin0-.Lfunc_begin0
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.quad .Ltmp0-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 85 # super-register DW_OP_reg5
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.quad .Ltmp0-.Lfunc_begin0
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.quad .Lfunc_end0-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 80 # super-register DW_OP_reg0
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.quad 0
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.quad 0
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.Ldebug_loc1:
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.quad .Lfunc_begin1-.Lfunc_begin0
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.quad .Ltmp2-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 85 # super-register DW_OP_reg5
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.quad .Ltmp2-.Lfunc_begin0
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.quad .Lfunc_end1-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 80 # super-register DW_OP_reg0
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.quad 0
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.quad 0
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 14 # DW_FORM_strp
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.byte 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 16 # DW_AT_stmt_list
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.byte 23 # DW_FORM_sec_offset
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.byte 27 # DW_AT_comp_dir
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.byte 14 # DW_FORM_strp
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.ascii "\227B" # DW_AT_GNU_all_call_sites
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.byte 25 # DW_FORM_flag_present
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.byte 49 # DW_AT_abstract_origin
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 3 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 2 # DW_AT_location
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.byte 23 # DW_FORM_sec_offset
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.byte 49 # DW_AT_abstract_origin
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 4 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 110 # DW_AT_linkage_name
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.byte 14 # DW_FORM_strp
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 32 # DW_AT_inline
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 5 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 6 # Abbreviation Code
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.byte 36 # DW_TAG_base_type
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 62 # DW_AT_encoding
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.byte 11 # DW_FORM_data1
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.byte 11 # DW_AT_byte_size
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 7 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.ascii "\227B" # DW_AT_GNU_all_call_sites
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.byte 25 # DW_FORM_flag_present
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 8 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 9 # Abbreviation Code
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.byte 29 # DW_TAG_inlined_subroutine
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.byte 1 # DW_CHILDREN_yes
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.byte 49 # DW_AT_abstract_origin
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.byte 19 # DW_FORM_ref4
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 88 # DW_AT_call_file
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.byte 11 # DW_FORM_data1
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.byte 89 # DW_AT_call_line
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.byte 11 # DW_FORM_data1
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.byte 87 # DW_AT_call_column
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 10 # Abbreviation Code
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.byte 15 # DW_TAG_pointer_type
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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.short 4 # DWARF version number
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 8 # Address Size (in bytes)
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.byte 1 # Abbrev [1] 0xb:0xc3 DW_TAG_compile_unit
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.long .Linfo_string0 # DW_AT_producer
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.short 33 # DW_AT_language
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.long .Linfo_string1 # DW_AT_name
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.long .Lline_table_start0 # DW_AT_stmt_list
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.long .Linfo_string2 # DW_AT_comp_dir
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.quad .Lfunc_begin0 # DW_AT_low_pc
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.long .Lfunc_end1-.Lfunc_begin0 # DW_AT_high_pc
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.byte 2 # Abbrev [2] 0x2a:0x1d DW_TAG_subprogram
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.quad .Lfunc_begin0 # DW_AT_low_pc
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.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
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.byte 1 # DW_AT_frame_base
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.byte 87
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# DW_AT_GNU_all_call_sites
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.long 71 # DW_AT_abstract_origin
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.byte 3 # Abbrev [3] 0x3d:0x9 DW_TAG_formal_parameter
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.long .Ldebug_loc0 # DW_AT_location
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.long 87 # DW_AT_abstract_origin
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.byte 0 # End Of Children Mark
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.byte 4 # Abbrev [4] 0x47:0x1c DW_TAG_subprogram
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.long .Linfo_string3 # DW_AT_linkage_name
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.long .Linfo_string4 # DW_AT_name
|
||||
.byte 1 # DW_AT_decl_file
|
||||
.byte 1 # DW_AT_decl_line
|
||||
.long 99 # DW_AT_type
|
||||
# DW_AT_external
|
||||
.byte 1 # DW_AT_inline
|
||||
.byte 5 # Abbrev [5] 0x57:0xb DW_TAG_formal_parameter
|
||||
.long .Linfo_string6 # DW_AT_name
|
||||
.byte 1 # DW_AT_decl_file
|
||||
.byte 1 # DW_AT_decl_line
|
||||
.long 99 # DW_AT_type
|
||||
.byte 0 # End Of Children Mark
|
||||
.byte 6 # Abbrev [6] 0x63:0x7 DW_TAG_base_type
|
||||
.long .Linfo_string5 # DW_AT_name
|
||||
.byte 5 # DW_AT_encoding
|
||||
.byte 4 # DW_AT_byte_size
|
||||
.byte 7 # Abbrev [7] 0x6a:0x52 DW_TAG_subprogram
|
||||
.quad .Lfunc_begin1 # DW_AT_low_pc
|
||||
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
|
||||
.byte 1 # DW_AT_frame_base
|
||||
.byte 87
|
||||
# DW_AT_GNU_all_call_sites
|
||||
.long .Linfo_string7 # DW_AT_name
|
||||
.byte 1 # DW_AT_decl_file
|
||||
.byte 5 # DW_AT_decl_line
|
||||
.long 99 # DW_AT_type
|
||||
# DW_AT_external
|
||||
.byte 8 # Abbrev [8] 0x83:0xd DW_TAG_formal_parameter
|
||||
.byte 1 # DW_AT_location
|
||||
.byte 85
|
||||
.long .Linfo_string8 # DW_AT_name
|
||||
.byte 1 # DW_AT_decl_file
|
||||
.byte 5 # DW_AT_decl_line
|
||||
.long 99 # DW_AT_type
|
||||
.byte 8 # Abbrev [8] 0x90:0xd DW_TAG_formal_parameter
|
||||
.byte 1 # DW_AT_location
|
||||
.byte 84
|
||||
.long .Linfo_string9 # DW_AT_name
|
||||
.byte 1 # DW_AT_decl_file
|
||||
.byte 5 # DW_AT_decl_line
|
||||
.long 188 # DW_AT_type
|
||||
.byte 9 # Abbrev [9] 0x9d:0x1e DW_TAG_inlined_subroutine
|
||||
.long 71 # DW_AT_abstract_origin
|
||||
.quad .Lfunc_begin1 # DW_AT_low_pc
|
||||
.long 0 # DW_AT_high_pc # This was manually modified to be 0
|
||||
.byte 1 # DW_AT_call_file
|
||||
.byte 6 # DW_AT_call_line
|
||||
.byte 10 # DW_AT_call_column
|
||||
.byte 3 # Abbrev [3] 0xb1:0x9 DW_TAG_formal_parameter
|
||||
.long .Ldebug_loc1 # DW_AT_location
|
||||
.long 87 # DW_AT_abstract_origin
|
||||
.byte 0 # End Of Children Mark
|
||||
.byte 0 # End Of Children Mark
|
||||
.byte 10 # Abbrev [10] 0xbc:0x5 DW_TAG_pointer_type
|
||||
.long 193 # DW_AT_type
|
||||
.byte 10 # Abbrev [10] 0xc1:0x5 DW_TAG_pointer_type
|
||||
.long 198 # DW_AT_type
|
||||
.byte 6 # Abbrev [6] 0xc6:0x7 DW_TAG_base_type
|
||||
.long .Linfo_string10 # DW_AT_name
|
||||
.byte 6 # DW_AT_encoding
|
||||
.byte 1 # DW_AT_byte_size
|
||||
.byte 0 # End Of Children Mark
|
||||
.Ldebug_info_end0:
|
||||
.section .debug_str,"MS",@progbits,1
|
||||
.Linfo_string0:
|
||||
.asciz "clang version 15.0.0" # string offset=0
|
||||
.Linfo_string1:
|
||||
.asciz "main.cpp" # string offset=134
|
||||
.Linfo_string2:
|
||||
.asciz "." # string offset=143
|
||||
.Linfo_string3:
|
||||
.asciz "_Z6helperi" # string offset=181
|
||||
.Linfo_string4:
|
||||
.asciz "helper" # string offset=192
|
||||
.Linfo_string5:
|
||||
.asciz "int" # string offset=199
|
||||
.Linfo_string6:
|
||||
.asciz "i" # string offset=203
|
||||
.Linfo_string7:
|
||||
.asciz "main" # string offset=205
|
||||
.Linfo_string8:
|
||||
.asciz "argc" # string offset=210
|
||||
.Linfo_string9:
|
||||
.asciz "argv" # string offset=215
|
||||
.Linfo_string10:
|
||||
.asciz "char" # string offset=220
|
||||
.ident "clang version 15.0.0"
|
||||
.section ".note.GNU-stack","",@progbits
|
||||
.addrsig
|
||||
.section .debug_line,"",@progbits
|
||||
.Lline_table_start0:
|
||||
Loading…
Reference in New Issue