diff options
| author | George Rimar <grimar@accesssoftek.com> | 2017-10-25 10:23:49 +0000 |
|---|---|---|
| committer | George Rimar <grimar@accesssoftek.com> | 2017-10-25 10:23:49 +0000 |
| commit | db07f4c8a7d27039cb9b8e6c850de11f91060412 (patch) | |
| tree | 58fde608b3d23679ebc7c1883d5f687410a96393 /test | |
| parent | 36ed9f491536a45f54afb59f2fe780c9cbef0fc0 (diff) | |
[llvm-dwarfdump] - Fix array out of bounds access crash.
This fixes possible out of bound access in
DWARFDie::getFirstChild()
which might happen when .debug_info section is corrupted,
like shown in testcase.
Differential revision: https://reviews.llvm.org/D39185
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316566 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/tools/llvm-dwarfdump/X86/verify_debug_info2.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/tools/llvm-dwarfdump/X86/verify_debug_info2.s b/test/tools/llvm-dwarfdump/X86/verify_debug_info2.s new file mode 100644 index 00000000000..71b95579839 --- /dev/null +++ b/test/tools/llvm-dwarfdump/X86/verify_debug_info2.s @@ -0,0 +1,42 @@ +# RUN: llvm-mc %s -filetype obj -triple=i686-pc-linux -o %t +# RUN: not llvm-dwarfdump -v -verify %t 2>&1 | FileCheck %s +# CHECK: The length for this unit is too large for the .debug_info provided. + +## Check we do not crash when trying to parse truncated .debug_info. +.section .debug_info,"",@progbits + .long 0x1c + .value 0x4 + .long .Ldebug_abbrev0 + .byte 0x4 + + .uleb128 0x1 # DW_TAG_compile_unit [1] * + .long 0 # DW_AT_producer [DW_FORM_strp] ( .debug_str[0x00000000] = "test") + .byte 0x4 # DW_AT_language [DW_FORM_data1] (DW_LANG_C_plus_plus) + .long 0 # DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000000] = "test") + .long 0 # DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000000] = "test") + .long 0 # DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000) + .long 0 # DW_AT_high_pc [DW_FORM_data4] (0x00000000) + +.section .debug_abbrev,"",@progbits +.Ldebug_abbrev0: + .uleb128 0x1 + .uleb128 0x11 # DW_TAG_compile_unit, DW_CHILDREN_yes + .byte 0x1 + .uleb128 0x25 # DW_AT_producer, DW_FORM_strp + .uleb128 0xe + .uleb128 0x13 # DW_AT_language, DW_FORM_data1 + .uleb128 0xb + .uleb128 0x3 # DW_AT_name, DW_FORM_strp + .uleb128 0xe + .uleb128 0x1b # DW_AT_comp_dir, DW_FORM_strp + .uleb128 0xe + .uleb128 0x11 # DW_AT_low_pc, DW_FORM_addr + .uleb128 0x1 + .uleb128 0x12 # DW_AT_high_pc, DW_FORM_data4 + .uleb128 0x6 + .byte 0 + .byte 0 + .byte 0 + +.section .debug_str,"MS",@progbits,1 +.string "test" |