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author | David Blaikie <dblaikie@gmail.com> | 2013-06-28 20:05:11 +0000 |
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committer | David Blaikie <dblaikie@gmail.com> | 2013-06-28 20:05:11 +0000 |
commit | 59eaa3874663f80ce111a4781b8f1db82995210c (patch) | |
tree | 996e6895665112c7efb69fd8480b323e7cad5c29 /test/DebugInfo/X86 | |
parent | 95e72c90e4e2ee64e12d898f6495e796ebcadaf8 (diff) | |
download | external_llvm-59eaa3874663f80ce111a4781b8f1db82995210c.zip external_llvm-59eaa3874663f80ce111a4781b8f1db82995210c.tar.gz external_llvm-59eaa3874663f80ce111a4781b8f1db82995210c.tar.bz2 |
DebugInfo: PR14728: TLS support
Based on GCC's output for TLS variables (OP_constNu, x@dtpoff,
OP_lo_user), this implements debug info support for TLS in ELF. Verified
that this output is correct/sufficient on Linux (using gold - if you're
using binutils-ld, you'll need something with the fix for
http://sourceware.org/bugzilla/show_bug.cgi?id=15685 in it).
Support on non-ELF is sort of "arbitrary" at the moment - if Apple folks
want to discuss (or just go ahead & implement) how this should work in
MachO, etc, I'm open.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185203 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/DebugInfo/X86')
-rw-r--r-- | test/DebugInfo/X86/tls.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/DebugInfo/X86/tls.ll b/test/DebugInfo/X86/tls.ll new file mode 100644 index 0000000..2ed673a --- /dev/null +++ b/test/DebugInfo/X86/tls.ll @@ -0,0 +1,34 @@ +; RUN: llc -mtriple=x86_64-unknown-unknown -O0 -filetype=asm < %s | FileCheck %s +; RUN: llc -mtriple=i386-unknown-unknown -O0 -filetype=asm < %s | FileCheck --check-prefix=CHECK-32 %s + +; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use +; that here instead of raw assembly printing + +; 10 bytes of data in this DW_FORM_block1 representation of the location of 'tls' +; CHECK: .byte 10{{ *}}# DW_AT_location +; DW_OP_const8u (0x0e == 14) of adress +; CHECK: .byte 14 +; The debug relocation of the address of the tls variable +; CHECK: .quad tls@DTPOFF +; DW_OP_lo_user based on GCC/GDB extension presumably (by experiment) to support TLS +; CHECK: .byte 224 + +; same again, except with a 32 bit address +; CHECK-32: .byte 6{{ *}}# DW_AT_location +; CHECK-32: .byte 12 +; CHECK-32: .long tls@DTPOFF +; CHECK-32: .byte 224 + +@tls = thread_local global i32 7, align 4 + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!7} + +!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !3, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/tmp/tls.cpp] [DW_LANG_C_plus_plus] +!1 = metadata !{metadata !"tls.cpp", metadata !"/tmp"} +!2 = metadata !{i32 0} +!3 = metadata !{metadata !4} +!4 = metadata !{i32 786484, i32 0, null, metadata !"tls", metadata !"tls", metadata !"", metadata !5, i32 1, metadata !6, i32 0, i32 1, i32* @tls, null} ; [ DW_TAG_variable ] [tls] [line 1] [def] +!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/tls.cpp] +!6 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] +!7 = metadata !{i32 2, metadata !"Dwarf Version", i32 3} |