2019-06-04 02:15:38 +08:00
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# Check that unknown symbol subsections are ignored with a warning, and a PDB
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# is produced anyway.
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# REQUIRES: x86
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# RUN: llvm-mc -triple=i386-pc-win32 -filetype=obj -o %t.obj %s
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[COFF] Implement /safeseh:no and check @feat.00 flags by default
Summary:
Fixes PR41828. Before this, LLD always emitted SafeSEH chunks and
defined __safe_se_handler_table & size. Now, /safeseh:no leaves those
undefined.
Additionally, we were checking for the safeseh @feat.00 flag in two
places: once to emit errors, and once during safeseh table construction.
The error was set up to be off by default, but safeseh is supposed to be
on by default. I combined the two checks, so now LLD emits an error if
an input object lacks @feat.00 and safeseh is enabled. This caused the
majority of 32-bit LLD tests to fail, since many test input object files
lack @feat.00 symbols. I explicitly added -safeseh:no to those tests to
preserve behavior.
Finally, LLD no longer sets IMAGE_DLL_CHARACTERISTICS_NO_SEH if any
input file wasn't compiled for safeseh.
Reviewers: mstorsjo, ruiu, thakis
Reviewed By: ruiu, thakis
Subscribers: llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63570
llvm-svn: 366238
2019-07-17 02:17:33 +08:00
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# RUN: lld-link -safeseh:no -subsystem:console -debug -nodefaultlib -entry:foo -out:%t.exe -pdb:%t.pdb %t.obj 2>&1 | FileCheck %s --check-prefix=WARNING
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2019-06-04 02:15:38 +08:00
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# RUN: llvm-pdbutil dump -symbols %t.pdb | FileCheck %s
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2019-06-19 03:41:25 +08:00
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# WARNING-NOT: ignoring unknown
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2019-06-04 02:15:38 +08:00
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# WARNING: ignoring unknown debug$S subsection kind 0xFF
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2019-06-19 03:41:25 +08:00
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# WARNING-NOT: ignoring unknown
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2019-06-04 02:15:38 +08:00
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# CHECK: Symbols
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# CHECK: 4 | S_COMPILE3 [size = 52]
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# CHECK: machine = intel x86-x64, Ver = clang version SENTINEL, language = c
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.text
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_foo:
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ret
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.global _foo
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.section .debug$S,"dr"
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.p2align 2
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.long 4 # Debug section magic
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.long 0xF1 # Symbol subsection
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.long .Ltmp6-.Ltmp5 # Subsection size
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.Ltmp5:
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.short .Ltmp8-.Ltmp7 # Record length
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.Ltmp7:
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.short 4412 # Record kind: S_COMPILE3
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.long 0 # Flags and language
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.short 208 # CPUType
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.short 9 # Frontend version
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.short 0
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.short 0
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.short 0
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.short 9000 # Backend version
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.short 0
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.short 0
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.short 0
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.asciz "clang version SENTINEL" # Null-terminated compiler version string
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.p2align 2
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.Ltmp8:
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.Ltmp6:
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.long 0xFF # Unknown subsection kind
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.long 4 # Subsection size
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.long 0
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2019-06-19 03:41:25 +08:00
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.long 0x800000F1 # Unknown subsection kind
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.long 4 # Subsection size
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.long 0
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.long 0x800000F2 # Unknown subsection kind
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.long 4 # Subsection size
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.long 0
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.long 0x800000F3 # Unknown subsection kind
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.long 4 # Subsection size
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.long 0
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.long 0x800000F4 # Unknown subsection kind
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.long 4 # Subsection size
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.long 0
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