forked from OSchip/llvm-project
[llvm-readobj/elf] - Report warnings instead of errors when dumping broken stack sizes sections.
This replaces `reportError` calls with `reportUniqueWarning` and improves testing for the code that is related to stack sizes dumping. Differential revision: https://reviews.llvm.org/D86783
This commit is contained in:
parent
03812041d8
commit
7de090a324
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@ -176,14 +176,30 @@ Symbols:
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Type: STT_FUNC
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Type: STT_FUNC
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Binding: STB_GLOBAL
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Binding: STB_GLOBAL
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## Check that we report an error when we find relocations whose offsets point outside
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## Check that we report a warning when we find relocations whose offsets point outside
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## of the .stack_sizes section.
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## of the .stack_sizes section.
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# RUN: yaml2obj --docnum=3 %s -o %t03
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# RUN: yaml2obj --docnum=3 %s -o %t03
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# RUN: not llvm-readelf --stack-sizes %t03 2>&1 | FileCheck %s --check-prefix=SHORT -DFILE=%t03
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# RUN: llvm-readelf --stack-sizes %t03 2>&1 | FileCheck %s --check-prefix=SHORT-GNU -DFILE=%t03
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# RUN: not llvm-readobj --stack-sizes %t03 2>&1 | FileCheck %s --check-prefix=SHORT -DFILE=%t03
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# RUN: llvm-readobj --stack-sizes %t03 2>&1 | FileCheck %s --check-prefix=SHORT-LLVM -DFILE=%t03
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# SHORT: error: '[[FILE]]': found invalid relocation offset into section .stack_sizes while trying to extract a stack size entry
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# SHORT-GNU: Stack Sizes:
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# SHORT-GNU-NEXT: Size Function
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# SHORT-GNU-NEXT: 8 foo
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# SHORT-GNU-NEXT: warning: '[[FILE]]': found invalid relocation offset (0x1) into section .stack_sizes while trying to extract a stack size entry
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# SHORT-GNU-NEXT: 8 foo
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# SHORT-LLVM: StackSizes [
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# SHORT-LLVM-NEXT: Entry {
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# SHORT-LLVM-NEXT: Function: foo
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# SHORT-LLVM-NEXT: Size: 0x8
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# SHORT-LLVM-NEXT: }
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# SHORT-LLVM-NEXT: warning: '[[FILE]]': found invalid relocation offset (0x1) into section .stack_sizes while trying to extract a stack size entry
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# SHORT-LLVM-NEXT: Entry {
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# SHORT-LLVM-NEXT: Function: foo
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# SHORT-LLVM-NEXT: Size: 0x8
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# SHORT-LLVM-NEXT: }
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# SHORT-LLVM-NEXT: ]
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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@ -198,13 +214,23 @@ Sections:
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Size: 16
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Size: 16
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- Name: .stack_sizes
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- Name: .stack_sizes
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Type: SHT_PROGBITS
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Type: SHT_PROGBITS
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Content: "00"
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Link: .text
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Link: .text
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Entries:
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- Size: 0x8
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- Name: .rela.stack_sizes
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- Name: .rela.stack_sizes
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Type: SHT_RELA
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Type: SHT_RELA
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Info: .stack_sizes
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Info: .stack_sizes
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Relocations:
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Relocations:
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- Offset: 1
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- Offset: 0x0
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Symbol: foo
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Type: R_X86_64_64
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- Offset: 0x1
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Symbol: foo
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Type: R_X86_64_64
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- Offset: 0x1
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Symbol: foo
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Type: R_X86_64_64
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- Offset: 0x0
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Symbol: foo
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Symbol: foo
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Type: R_X86_64_64
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Type: R_X86_64_64
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Symbols:
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Symbols:
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@ -271,45 +297,73 @@ Symbols:
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Type: STT_FUNC
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Type: STT_FUNC
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Binding: STB_GLOBAL
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Binding: STB_GLOBAL
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## Check that we report an error when a stack sizes section ends with an incomplete stack size entry.
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## Check that we report a warning when a stack sizes section ends with an incomplete stack size entry.
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# RUN: yaml2obj --docnum=5 %s -o %t05
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# RUN: yaml2obj --docnum=5 %s -o %t05
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# RUN: not llvm-readelf --stack-sizes %t05 2>&1 | \
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# RUN: llvm-readelf --stack-sizes %t05 2>&1 | \
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# RUN: FileCheck %s --check-prefix=SUDDENEND -DFILE=%t05
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# RUN: FileCheck %s --check-prefix=SUDDENEND-GNU -DFILE=%t05
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# RUN: not llvm-readobj --stack-sizes %t05 2>&1 | \
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# RUN: llvm-readobj --stack-sizes %t05 2>&1 | \
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# RUN: FileCheck %s --check-prefix=SUDDENEND -DFILE=%t05
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# RUN: FileCheck %s --check-prefix=SUDDENEND-LLVM -DFILE=%t05
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# SUDDENEND: error: '[[FILE]]': section .stack_sizes ended while trying to extract a stack size entry
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# SUDDENEND-GNU: Stack Sizes:
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# SUDDENEND-GNU-NEXT: Size Function
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# SUDDENEND-GNU-NEXT: 8 foo
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# SUDDENEND-GNU-NEXT: warning: '[[FILE]]': SHT_PROGBITS section with index 2 ended while trying to extract a stack size entry
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# SUDDENEND-GNU-NEXT: 8 foo
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# SUDDENEND-GNU-NEXT: warning: '[[FILE]]': SHT_PROGBITS section with index 3 ended while trying to extract a stack size entry
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# SUDDENEND-LLVM: StackSizes [
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# SUDDENEND-LLVM-NEXT: Entry {
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# SUDDENEND-LLVM-NEXT: Function: foo
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# SUDDENEND-LLVM-NEXT: Size: 0x8
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# SUDDENEND-LLVM-NEXT: }
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# SUDDENEND-LLVM-NEXT: warning: '[[FILE]]': SHT_PROGBITS section with index 2 ended while trying to extract a stack size entry
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# SUDDENEND-LLVM-NEXT: Entry {
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# SUDDENEND-LLVM-NEXT: Function: foo
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# SUDDENEND-LLVM-NEXT: Size: 0x8
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# SUDDENEND-LLVM-NEXT: }
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# SUDDENEND-LLVM-NEXT: warning: '[[FILE]]': SHT_PROGBITS section with index 3 ended while trying to extract a stack size entry
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# SUDDENEND-LLVM-NEXT: ]
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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Class: ELFCLASS64
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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Sections:
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- Name: .text
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- Name: .text
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Type: SHT_PROGBITS
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Type: SHT_PROGBITS
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Flags: [SHF_ALLOC]
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Size: 16
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- Name: .stack_sizes
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- Name: .stack_sizes
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Type: SHT_PROGBITS
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Type: SHT_PROGBITS
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Content: "10000000"
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Link: .text
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Link: .text
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Entries:
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- Size: 0x8
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- Size: 0x10
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## 0x11 == the normal size minus 1.
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ShSize: 0x11
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- Name: .stack_sizes (1)
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Type: SHT_PROGBITS
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Link: .text
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Entries:
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- Size: 0x8
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- Size: 0x10
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ShSize: 0x11
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Symbols:
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Symbols:
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- Name: foo
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- Name: foo
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Section: .text
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Section: .text
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Value: 0x10
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Type: STT_FUNC
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Type: STT_FUNC
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Binding: STB_GLOBAL
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## Check that we report an invalid stack size, which is represented by a ULEB that
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## Check that we report an invalid stack size, which is represented by a ULEB that
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## ends in a byte with the high bit set.
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## ends in a byte with the high bit set.
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# RUN: yaml2obj --docnum=6 %s -o %t06
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# RUN: yaml2obj --docnum=6 %s -o %t06
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# RUN: not llvm-readelf --stack-sizes %t06 2>&1 | FileCheck %s --check-prefix=BADSIZE -DFILE=%t06
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# RUN: llvm-readelf --stack-sizes %t06 2>&1 | FileCheck %s --check-prefix=BADSIZE -DFILE=%t06
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# RUN: not llvm-readobj --stack-sizes %t06 2>&1 | FileCheck %s --check-prefix=BADSIZE -DFILE=%t06
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# RUN: llvm-readobj --stack-sizes %t06 2>&1 | FileCheck %s --check-prefix=BADSIZE -DFILE=%t06
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# BADSIZE: error: '[[FILE]]': could not extract a valid stack size in section .stack_sizes
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## TODO: these messages should be improved to include section indices.
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# BADSIZE: warning: '[[FILE]]': could not extract a valid stack size in section .stack_sizes
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# BADSIZE: warning: '[[FILE]]': could not extract a valid stack size in section .stack_sizes
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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@ -325,6 +379,10 @@ Sections:
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Type: SHT_PROGBITS
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Type: SHT_PROGBITS
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Content: "100000000000000080"
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Content: "100000000000000080"
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Link: .text
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Link: .text
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- Name: .stack_sizes (1)
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Type: SHT_PROGBITS
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Content: "100000000000000080"
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Link: .text
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Symbols:
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Symbols:
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- Name: foo
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- Name: foo
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Section: .text
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Section: .text
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@ -533,14 +591,27 @@ Symbols:
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Type: STT_OBJECT
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Type: STT_OBJECT
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Binding: STB_GLOBAL
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Binding: STB_GLOBAL
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## Check that we report an error when we find an unsupported relocation
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## Check that we report a warning when we find an unsupported relocation
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## in the section that contains the stack size entries' relocations.
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## in the section that contains the stack size entries' relocations.
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# RUN: yaml2obj --docnum=10 %s -o %t15
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# RUN: yaml2obj --docnum=10 %s -o %t15
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# RUN: not llvm-readelf --stack-sizes %t15 2>&1 | FileCheck %s --check-prefix=UNSUPPRELOC -DFILE=%t15
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# RUN: llvm-readelf --stack-sizes %t15 2>&1 | FileCheck %s --check-prefix=UNSUPPRELOC-GNU -DFILE=%t15
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# RUN: not llvm-readobj --stack-sizes %t15 2>&1 | FileCheck %s --check-prefix=UNSUPPRELOC -DFILE=%t15
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# RUN: llvm-readobj --stack-sizes %t15 2>&1 | FileCheck %s --check-prefix=UNSUPPRELOC-LLVM -DFILE=%t15
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# UNSUPPRELOC: error: '[[FILE]]': unsupported relocation type in section .rela.stack_sizes: R_X86_64_RELATIVE
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# UNSUPPRELOC-GNU: Stack Sizes:
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# UNSUPPRELOC-GNU-NEXT: Size Function
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# UNSUPPRELOC-GNU-NEXT: warning: '[[FILE]]': SHT_RELA section with index 3 contains an unsupported relocation with index 1: R_X86_64_RELATIVE
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# UNSUPPRELOC-GNU-NEXT: 0 foo
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# UNSUPPRELOC-GNU-NEXT: warning: '[[FILE]]': SHT_RELA section with index 3 contains an unsupported relocation with index 3: R_X86_64_RELATIVE
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# UNSUPPRELOC-LLVM: StackSizes [
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# UNSUPPRELOC-LLVM-NEXT: warning: '[[FILE]]': SHT_RELA section with index 3 contains an unsupported relocation with index 1: R_X86_64_RELATIVE
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# UNSUPPRELOC-LLVM-NEXT: Entry {
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# UNSUPPRELOC-LLVM-NEXT: Function: foo
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# UNSUPPRELOC-LLVM-NEXT: Size: 0x0
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# UNSUPPRELOC-LLVM-NEXT: }
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# UNSUPPRELOC-LLVM-NEXT: warning: '[[FILE]]': SHT_RELA section with index 3 contains an unsupported relocation with index 3: R_X86_64_RELATIVE
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# UNSUPPRELOC-LLVM-NEXT: ]
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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@ -555,7 +626,8 @@ Sections:
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- Name: .stack_sizes
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- Name: .stack_sizes
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Type: SHT_PROGBITS
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Type: SHT_PROGBITS
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Link: .text
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Link: .text
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Entries: []
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Entries:
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- Size: 0
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- Name: .rela.stack_sizes
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- Name: .rela.stack_sizes
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Type: SHT_RELA
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Type: SHT_RELA
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Info: .stack_sizes
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Info: .stack_sizes
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- Offset: 0
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- Offset: 0
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Symbol: foo
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Symbol: foo
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Type: R_X86_64_RELATIVE
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Type: R_X86_64_RELATIVE
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- Offset: 0
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Symbol: foo
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Type: R_X86_64_64
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- Offset: 0
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Symbol: foo
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Type: R_X86_64_RELATIVE
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Symbols:
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Symbols:
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- Name: foo
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- Name: foo
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Section: .text
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Section: .text
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Type: STT_FUNC
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Type: STT_FUNC
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Binding: STB_GLOBAL
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Binding: STB_GLOBAL
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## Check that we report an error when we are unable to resolve a relocation for a given ELF architecture.
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## Check that we report a warning when we are unable to resolve a relocation for a given ELF architecture.
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## Here we have a 64-bit relocation used in a 32-bit object.
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## Here we have a 64-bit relocation used in a 32-bit object.
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# RUN: yaml2obj --docnum=12 %s -o %t17
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# RUN: yaml2obj --docnum=12 %s -o %t17
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# RUN: not llvm-readelf --stack-sizes %t17 2>&1 | FileCheck %s -DFILE=%t17 --check-prefix=UNSUPPRELOC2
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# RUN: llvm-readelf --stack-sizes %t17 2>&1 | FileCheck %s -DFILE=%t17 --check-prefix=UNSUPPRELOC2
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# RUN: not llvm-readobj --stack-sizes %t17 2>&1 | FileCheck %s -DFILE=%t17 --check-prefix=UNSUPPRELOC2
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# RUN: llvm-readobj --stack-sizes %t17 2>&1 | FileCheck %s -DFILE=%t17 --check-prefix=UNSUPPRELOC2
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# UNSUPPRELOC2: error: '[[FILE]]': unsupported relocation type in section .rela.stack_sizes: R_X86_64_64
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# UNSUPPRELOC2: warning: '[[FILE]]': SHT_RELA section with index 2 contains an unsupported relocation with index 1: R_X86_64_64
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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- Offset: 0
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- Offset: 0
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Type: R_X86_64_64
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Type: R_X86_64_64
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## Check we report an error when dumping stack sizes if the relocated section
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## Check we report a warning when dumping stack sizes if the relocated section
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## identified by the sh_info field is invalid. Here the sh_info value is larger than
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## identified by the sh_info field is invalid. Here the sh_info value is larger than
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## the number of sections.
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## the number of sections.
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# RUN: yaml2obj --docnum=13 %s -o %t18
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# RUN: yaml2obj --docnum=13 %s -o %t18
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# RUN: not llvm-readelf --stack-sizes %t18 2>&1 | FileCheck %s -DFILE=%t18 --check-prefix=INVALID-TARGET
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# RUN: llvm-readelf --stack-sizes %t18 2>&1 | \
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# RUN: not llvm-readobj --stack-sizes %t18 2>&1 | FileCheck %s -DFILE=%t18 --check-prefix=INVALID-TARGET
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# RUN: FileCheck %s --implicit-check-not="warning:" -DFILE=%t18 --check-prefix=INVALID-TARGET
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# RUN: llvm-readobj --stack-sizes %t18 2>&1 | \
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# RUN: FileCheck %s --implicit-check-not="warning:" -DFILE=%t18 --check-prefix=INVALID-TARGET
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# INVALID-TARGET: error: '[[FILE]]': .rela.stack_sizes: failed to get a relocated section: invalid section index: 255
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# INVALID-TARGET: warning: '[[FILE]]': SHT_RELA section with index 1: failed to get a relocated section: invalid section index: 255
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# INVALID-TARGET: warning: '[[FILE]]': SHT_RELA section with index 2: failed to get a relocated section: invalid section index: 255
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--- !ELF
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--- !ELF
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FileHeader:
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FileHeader:
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@ -695,3 +776,8 @@ Sections:
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Link: 0
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Link: 0
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Info: 0xFF
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Info: 0xFF
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Relocations: []
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Relocations: []
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- Name: .rela.stack_sizes (1)
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Type: SHT_RELA
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Link: 0
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Info: 0xFF
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Relocations: []
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@ -5691,12 +5691,14 @@ void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj,
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uint64_t StackSize = Data.getULEB128(Offset);
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uint64_t StackSize = Data.getULEB128(Offset);
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// getULEB128() does not advance Offset if it is not able to extract a valid
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// getULEB128() does not advance Offset if it is not able to extract a valid
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// integer.
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// integer.
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if (*Offset == PrevOffset)
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if (*Offset == PrevOffset) {
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reportError(
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reportWarning(
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createStringError(object_error::parse_failed,
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createStringError(object_error::parse_failed,
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"could not extract a valid stack size in section %s",
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"could not extract a valid stack size in section %s",
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SectionName.data()),
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SectionName.data()),
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Obj->getFileName());
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Obj->getFileName());
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return;
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}
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printStackSizeEntry(StackSize, FuncName);
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printStackSizeEntry(StackSize, FuncName);
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}
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}
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@ -5750,13 +5752,14 @@ void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj,
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}
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}
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uint64_t Offset = Reloc.getOffset();
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uint64_t Offset = Reloc.getOffset();
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if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1))
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if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) {
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reportError(
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reportUniqueWarning(createStringError(
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createStringError(object_error::parse_failed,
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object_error::parse_failed,
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"found invalid relocation offset into section %s "
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"found invalid relocation offset (0x" + Twine::utohexstr(Offset) +
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"while trying to extract a stack size entry",
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") into section " + StackSizeSectionName +
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StackSizeSectionName.data()),
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" while trying to extract a stack size entry"));
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FileStr);
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return;
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||||||
|
}
|
||||||
|
|
||||||
uint64_t Addend = Data.getAddress(&Offset);
|
uint64_t Addend = Data.getAddress(&Offset);
|
||||||
uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend);
|
uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend);
|
||||||
|
@ -5770,7 +5773,6 @@ void DumpStyle<ELFT>::printNonRelocatableStackSizes(
|
||||||
// This function ignores potentially erroneous input, unless it is directly
|
// This function ignores potentially erroneous input, unless it is directly
|
||||||
// related to stack size reporting.
|
// related to stack size reporting.
|
||||||
const ELFFile<ELFT> *EF = Obj->getELFFile();
|
const ELFFile<ELFT> *EF = Obj->getELFFile();
|
||||||
StringRef FileStr = Obj->getFileName();
|
|
||||||
for (const SectionRef &Sec : Obj->sections()) {
|
for (const SectionRef &Sec : Obj->sections()) {
|
||||||
StringRef SectionName = getSectionName(Sec);
|
StringRef SectionName = getSectionName(Sec);
|
||||||
if (SectionName != ".stack_sizes")
|
if (SectionName != ".stack_sizes")
|
||||||
|
@ -5785,12 +5787,11 @@ void DumpStyle<ELFT>::printNonRelocatableStackSizes(
|
||||||
// The function address is followed by a ULEB representing the stack
|
// The function address is followed by a ULEB representing the stack
|
||||||
// size. Check for an extra byte before we try to process the entry.
|
// size. Check for an extra byte before we try to process the entry.
|
||||||
if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) {
|
if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) {
|
||||||
reportError(
|
reportUniqueWarning(createStringError(
|
||||||
createStringError(
|
|
||||||
object_error::parse_failed,
|
object_error::parse_failed,
|
||||||
"section %s ended while trying to extract a stack size entry",
|
describe(EF, *ElfSec) +
|
||||||
SectionName.data()),
|
" ended while trying to extract a stack size entry"));
|
||||||
FileStr);
|
break;
|
||||||
}
|
}
|
||||||
uint64_t SymValue = Data.getAddress(&Offset);
|
uint64_t SymValue = Data.getAddress(&Offset);
|
||||||
printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName,
|
printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName,
|
||||||
|
@ -5832,12 +5833,14 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection();
|
Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection();
|
||||||
if (!RelSecOrErr)
|
if (!RelSecOrErr) {
|
||||||
reportError(createStringError(object_error::parse_failed,
|
reportUniqueWarning(
|
||||||
"%s: failed to get a relocated section: %s",
|
createStringError(object_error::parse_failed,
|
||||||
SectionName.data(),
|
describe(Obj->getELFFile(), *ElfSec) +
|
||||||
toString(RelSecOrErr.takeError()).c_str()),
|
": failed to get a relocated section: " +
|
||||||
Obj->getFileName());
|
toString(RelSecOrErr.takeError())));
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
const Elf_Shdr *ContentsSec =
|
const Elf_Shdr *ContentsSec =
|
||||||
Obj->getSection((*RelSecOrErr)->getRawDataRefImpl());
|
Obj->getSection((*RelSecOrErr)->getRawDataRefImpl());
|
||||||
|
@ -5881,14 +5884,19 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
|
||||||
std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj);
|
std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj);
|
||||||
auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents());
|
auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents());
|
||||||
DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr));
|
DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr));
|
||||||
|
size_t I = 0;
|
||||||
for (const RelocationRef &Reloc : RelocSec.relocations()) {
|
for (const RelocationRef &Reloc : RelocSec.relocations()) {
|
||||||
if (!IsSupportedFn || !IsSupportedFn(Reloc.getType()))
|
++I;
|
||||||
reportError(createStringError(
|
if (!IsSupportedFn || !IsSupportedFn(Reloc.getType())) {
|
||||||
|
const Elf_Shdr *RelocSecShdr =
|
||||||
|
Obj->getSection(RelocSec.getRawDataRefImpl());
|
||||||
|
reportUniqueWarning(createStringError(
|
||||||
object_error::parse_failed,
|
object_error::parse_failed,
|
||||||
"unsupported relocation type in section %s: %s",
|
describe(EF, *RelocSecShdr) +
|
||||||
getSectionName(RelocSec).data(),
|
" contains an unsupported relocation with index " + Twine(I) +
|
||||||
EF->getRelocationTypeName(Reloc.getType()).data()),
|
": " + EF->getRelocationTypeName(Reloc.getType())));
|
||||||
Obj->getFileName());
|
continue;
|
||||||
|
}
|
||||||
this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName,
|
this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName,
|
||||||
Resolver, Data);
|
Resolver, Data);
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue