From 5a26345fe22516ebe1a6278addb48c01f44ee137 Mon Sep 17 00:00:00 2001 From: Alok Kumar Sharma Date: Sun, 25 Apr 2021 19:50:58 +0530 Subject: [PATCH] [DebugInfo][llvm-dwarfdump] Fix printing of Unit header with DW_UT_partial type llvm-dwarfdump crashed for Unit header with DW_UT_partial type. ------------- llvm-dwarfdump: /tmp/llvm/include/llvm/ADT/Optional.h:197: T& llvm::optional_detail::OptionalStorage::getValue() & [with T = long unsigned int]: Assertion `hasVal' failed. PLEASE submit a bug report to the technical support section of https://developer.amd.com/amd-aocc and include the crash backtrace. Stack dump: 0. Program arguments: llvm-dwarfdump -v /tmp/test/DebugInfo/X86/Output/dwarfdump-he ader.s.tmp.o #0 0x00007f37d5ad8838 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /tmp/llvm/lib/Support/Unix/Signals.inc:565:0 #1 0x00007f37d5ad88ef PrintStackTraceSignalHandler(void*) /tmp/llvm/lib/Support/Unix/Signals.inc:632:0 #2 0x00007f37d5ad65bd llvm::sys::RunSignalHandlers() /tmp/llvm/lib/Support/Signals.cpp:71:0 #3 0x00007f37d5ad81b9 SignalHandler(int) /tmp/llvm/lib/Support/Unix/Signals.inc:407:0 #4 0x00007f37d4c26040 (/lib/x86_64-linux-gnu/libc.so.6+0x3f040) #5 0x00007f37d4c25fb7 raise /build/glibc-S9d2JN/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0 #6 0x00007f37d4c27921 abort /build/glibc-S9d2JN/glibc-2.27/stdlib/abort.c:81:0 #7 0x00007f37d4c1748a __assert_fail_base /build/glibc-S9d2JN/glibc-2.27/assert/assert.c:89:0 #8 0x00007f37d4c17502 (/lib/x86_64-linux-gnu/libc.so.6+0x30502) #9 0x00007f37d7576b81 llvm::optional_detail::OptionalStorage::getValue() & /tmp/llvm/include/llvm/ADT/Optional.h:198:0 #10 0x00007f37d75726ac llvm::Optional::operator*() && /tmp/llvm/include/llvm/ADT/Optional.h:309:0 #11 0x00007f37d7582968 llvm::DWARFCompileUnit::dump(llvm::raw_ostream&, llvm::DIDumpOptions) /tmp/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp:30:0 -------------- Patch by: @jini.susan Reviewed By: @probinson Differential Revision: https://reviews.llvm.org/D101255 --- llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp | 3 ++- llvm/test/DebugInfo/X86/dwarfdump-header.s | 23 +++++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp b/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp index 2b08120..6e30309 100644 --- a/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp +++ b/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp @@ -26,7 +26,8 @@ void DWARFCompileUnit::dump(raw_ostream &OS, DIDumpOptions DumpOpts) { if (!getAbbreviations()) OS << " (invalid)"; OS << ", addr_size = " << format("0x%02x", getAddressByteSize()); - if (getVersion() >= 5 && getUnitType() != dwarf::DW_UT_compile) + if (getVersion() >= 5 && (getUnitType() == dwarf::DW_UT_skeleton || + getUnitType() == dwarf::DW_UT_split_compile)) OS << ", DWO_id = " << format("0x%016" PRIx64, *getDWOId()); OS << " (next unit at " << format("0x%08" PRIx64, getNextUnitOffset()) << ")\n"; diff --git a/llvm/test/DebugInfo/X86/dwarfdump-header.s b/llvm/test/DebugInfo/X86/dwarfdump-header.s index 3d1c538..2d75839 100644 --- a/llvm/test/DebugInfo/X86/dwarfdump-header.s +++ b/llvm/test/DebugInfo/X86/dwarfdump-header.s @@ -59,6 +59,13 @@ dwo_LT_5b: .byte 0x0e # DW_FORM_strp .byte 0x00 # EOM(1) .byte 0x00 # EOM(2) + .byte 0x04 # Abbrev code + .byte 0x3c # DW_TAG_partial_unit + .byte 0x00 # DW_CHILDREN_no + .byte 0x03 # DW_AT_name + .byte 0x0e # DW_FORM_strp + .byte 0x00 # EOM(1) + .byte 0x00 # EOM(2) .byte 0x00 # EOM(3) # And a .dwo copy for the .dwo sections. @@ -128,6 +135,22 @@ CU_5_end: # CHECK: 0x00000019: Compile Unit: length = 0x00000016, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000033) # CHECK: 0x00000025: DW_TAG_compile_unit +# DWARF v5 CU header (Unit Type = DW_UT_partial). + .long CU_5_partial_end-CU_5_partial_version # Length of Unit +CU_5_partial_version: + .short 5 # DWARF version number + .byte 3 # DWARF Unit Type + .byte 8 # Address Size (in bytes) + .long .debug_abbrev # Offset Into Abbrev. Section +# The partial-unit DIE, with DW_AT_name + .byte 4 + .long str_CU_5 + .byte 0 # NULL +CU_5_partial_end: + +# CHECK: 0x00000033: Compile Unit: length = 0x0000000e, format = DWARF32, version = 0x0005, unit_type = DW_UT_partial, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000045) +# CHECK: 0x0000003f: DW_TAG_partial_unit + .section .debug_info.dwo,"e",@progbits # CHECK-LABEL: .debug_info.dwo -- 2.7.4