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[llvm-readobj] Don't print out section names for STABS symbols
This diff is similar to what D71394 did for `llvm-objdump` -- it avoids trying to look up a section name for STABS symbols, since some STABS symbol types (like `N_OSO`) use the `n_sect` field to store other data instead of a section index. Differential Revision: https://reviews.llvm.org/D88468
This commit is contained in:
Jez Ng
parent
9263495686
commit
985bef6e98
@ -63,7 +63,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: /var/folders/1d/zyfdpp7j2995h5hqspjy28bc0000gn/T/main-c5ac21.o (38)
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# CHECK-NEXT: Type: SymDebugTable (0x66)
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# CHECK-NEXT: Section: __got (0x3)
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# CHECK-NEXT: Section: (0x3)
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# CHECK-NEXT: RefType: ReferenceFlagUndefinedLazy (0x1)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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@ -72,7 +72,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: (207)
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# CHECK-NEXT: Type: SymDebugTable (0x2E)
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# CHECK-NEXT: Section: __text (0x1)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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@ -81,7 +81,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: _main (101)
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# CHECK-NEXT: Type: SymDebugTable (0x24)
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# CHECK-NEXT: Section: __text (0x1)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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@ -99,7 +99,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: (207)
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# CHECK-NEXT: Type: SymDebugTable (0x4E)
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# CHECK-NEXT: Section: __text (0x1)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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@ -108,7 +108,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: _PrivateSymbol (169)
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# CHECK-NEXT: Type: SymDebugTable (0x26)
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# CHECK-NEXT: Section: __bss (0x4)
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# CHECK-NEXT: Section: (0x4)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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@ -135,7 +135,7 @@
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: (207)
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# CHECK-NEXT: Type: SymDebugTable (0x64)
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# CHECK-NEXT: Section: __text (0x1)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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129
test/tools/llvm-readobj/MachO/stabs.yaml
Normal file
129
test/tools/llvm-readobj/MachO/stabs.yaml
Normal file
@ -0,0 +1,129 @@
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## Verify that llvm-readobj can dump files containing stabs symbols,
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## particularly symbols of type N_OSO which have repurposed the n_sect field
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## to store a non-section-index value.
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# RUN: yaml2obj %s -o %t
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# RUN: llvm-readobj --syms %t | FileCheck %s
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# CHECK: Symbols [
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: /Volumes/Sandbox/ (2)
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# CHECK-NEXT: Type: SymDebugTable (0x64)
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# CHECK-NEXT: Section: (0x0)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Value: 0x0
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: /Volumes/Sandbox/test.o (20)
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# CHECK-NEXT: Type: SymDebugTable (0x66)
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# CHECK-NEXT: Section: (0x3)
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# CHECK-NEXT: RefType: ReferenceFlagUndefinedLazy (0x1)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Value: 0x5F72D5E2
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: (1)
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# CHECK-NEXT: Type: SymDebugTable (0x2E)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Value: 0x100000FA0
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: _foo (44)
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# CHECK-NEXT: Type: SymDebugTable (0x24)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Value: 0x100000FA0
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: (1)
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# CHECK-NEXT: Type: SymDebugTable (0x4E)
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# CHECK-NEXT: Section: (0x1)
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# CHECK-NEXT: RefType: UndefinedNonLazy (0x0)
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# CHECK-NEXT: Flags [ (0x0)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Value: 0xF
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# CHECK-NEXT: }
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# CHECK-NEXT: ]
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--- !mach-o
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FileHeader:
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magic: 0xFEEDFACF
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cputype: 0x01000007
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cpusubtype: 0x00000003
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filetype: 0x00000002
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ncmds: 2
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sizeofcmds: 744
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flags: 0x00200085
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reserved: 0x00000000
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LoadCommands:
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- cmd: LC_SEGMENT_64
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cmdsize: 232
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segname: __TEXT
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vmaddr: 4294967296
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vmsize: 4096
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fileoff: 0
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filesize: 4096
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maxprot: 5
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initprot: 5
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nsects: 1
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flags: 0
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Sections:
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- sectname: __text
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segname: __TEXT
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addr: 0x00000000
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size: 0
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offset: 0x00000000
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align: 4
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reloff: 0x00000000
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nreloc: 0
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flags: 0x80000400
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- cmd: LC_SYMTAB
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cmdsize: 24
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symoff: 4152
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nsyms: 5
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stroff: 4328
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strsize: 49
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LinkEditData:
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NameList:
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- n_strx: 2
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n_type: 0x64 ## N_SO
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n_sect: 0
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n_desc: 0
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n_value: 0
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- n_strx: 20
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n_type: 0x66 ## N_OSO
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n_sect: 3
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n_desc: 1
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n_value: 1601361378
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- n_strx: 1
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n_type: 0x2E ## N_BNSYM
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n_sect: 1
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n_desc: 0
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n_value: 4294971296
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- n_strx: 44
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n_type: 0x24 ## N_FUN
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n_sect: 1
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n_desc: 0
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n_value: 4294971296
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- n_strx: 1
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n_type: 0x4E ## N_ENSYM
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n_sect: 1
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n_desc: 0
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n_value: 15
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StringTable:
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- ' '
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- '/Volumes/Sandbox/'
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- '/Volumes/Sandbox/test.o'
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- _foo
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...
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@ -623,13 +623,20 @@ void MachODumper::printSymbol(const SymbolRef &Symbol) {
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getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
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StringRef SectionName = "";
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Expected<section_iterator> SecIOrErr = Symbol.getSection();
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if (!SecIOrErr)
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reportError(SecIOrErr.takeError(), Obj->getFileName());
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// Don't ask a Mach-O STABS symbol for its section unless we know that
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// STAB symbol's section field refers to a valid section index. Otherwise
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// the symbol may error trying to load a section that does not exist.
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// TODO: Add a whitelist of STABS symbol types that contain valid section
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// indices.
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if (!(MOSymbol.Type & MachO::N_STAB)) {
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Expected<section_iterator> SecIOrErr = Symbol.getSection();
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if (!SecIOrErr)
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reportError(SecIOrErr.takeError(), Obj->getFileName());
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section_iterator SecI = *SecIOrErr;
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if (SecI != Obj->section_end())
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SectionName = unwrapOrError(Obj->getFileName(), SecI->getName());
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section_iterator SecI = *SecIOrErr;
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if (SecI != Obj->section_end())
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SectionName = unwrapOrError(Obj->getFileName(), SecI->getName());
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}
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DictScope D(W, "Symbol");
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W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
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