[compiler-rt] r196480 - [sanitizer] support toolchains that don't understand CFI directives
Kostya Serebryany
kcc at google.com
Wed Dec 4 23:44:35 PST 2013
Author: kcc
Date: Thu Dec 5 01:44:35 2013
New Revision: 196480
URL: http://llvm.org/viewvc/llvm-project?rev=196480&view=rev
Log:
[sanitizer] support toolchains that don't understand CFI directives
Summary: Support toolchains that don't understand CFI directives.
Reviewers: dvyukov
Reviewed By: dvyukov
CC: llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D2336
Added:
compiler-rt/trunk/lib/sanitizer_common/sanitizer_asm.h
Modified:
compiler-rt/trunk/lib/tsan/rtl/tsan_rtl.h
compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_amd64.S
Added: compiler-rt/trunk/lib/sanitizer_common/sanitizer_asm.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_asm.h?rev=196480&view=auto
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_asm.h (added)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_asm.h Thu Dec 5 01:44:35 2013
@@ -0,0 +1,40 @@
+//===-- sanitizer_asm.h -----------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Various support for assemebler.
+//
+//===----------------------------------------------------------------------===//
+
+// Some toolchains do not support .cfi asm directives, so we have to hide
+// them inside macros.
+#if defined(__clang__) || \
+ (defined(__GNUC__) && defined(__GCC_HAVE_DWARF2_CFI_ASM))
+ // GCC defined __GCC_HAVE_DWARF2_CFI_ASM if it supports CFI.
+ // Clang seems to support CFI by default (or not?).
+ // We need two versions of macros: for inline asm and standalone asm files.
+# define CFI_INL_ADJUST_CFA_OFFSET(n) ".cfi_adjust_cfa_offset " #n ";"
+
+# define CFI_STARTPROC .cfi_startproc
+# define CFI_ENDPROC .cfi_endproc
+# define CFI_ADJUST_CFA_OFFSET(n) .cfi_adjust_cfa_offset n
+# define CFI_REL_OFFSET(reg, n) .cfi_rel_offset reg, n
+# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg
+# define CFI_RESTORE(reg) .cfi_restore reg
+
+#else // No CFI
+# define CFI_INL_ADJUST_CFA_OFFSET(n)
+# define CFI_STARTPROC
+# define CFI_ENDPROC
+# define CFI_ADJUST_CFA_OFFSET(n)
+# define CFI_REL_OFFSET(reg, n)
+# define CFI_DEF_CFA_REGISTER(reg)
+# define CFI_RESTORE(reg)
+#endif
+
+
Modified: compiler-rt/trunk/lib/tsan/rtl/tsan_rtl.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_rtl.h?rev=196480&r1=196479&r2=196480&view=diff
==============================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_rtl.h (original)
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_rtl.h Thu Dec 5 01:44:35 2013
@@ -28,6 +28,7 @@
#include "sanitizer_common/sanitizer_allocator.h"
#include "sanitizer_common/sanitizer_allocator_internal.h"
+#include "sanitizer_common/sanitizer_asm.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_libignore.h"
#include "sanitizer_common/sanitizer_suppressions.h"
@@ -736,11 +737,11 @@ void AcquireReleaseImpl(ThreadState *thr
// so we create a reserve stack frame for it (1024b must be enough).
#define HACKY_CALL(f) \
__asm__ __volatile__("sub $1024, %%rsp;" \
- ".cfi_adjust_cfa_offset 1024;" \
+ CFI_INL_ADJUST_CFA_OFFSET(1024) \
".hidden " #f "_thunk;" \
"call " #f "_thunk;" \
"add $1024, %%rsp;" \
- ".cfi_adjust_cfa_offset -1024;" \
+ CFI_INL_ADJUST_CFA_OFFSET(-1024) \
::: "memory", "cc");
#else
#define HACKY_CALL(f) f()
Modified: compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_amd64.S
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_amd64.S?rev=196480&r1=196479&r2=196480&view=diff
==============================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_amd64.S (original)
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_amd64.S Thu Dec 5 01:44:35 2013
@@ -1,43 +1,44 @@
+#include "sanitizer_common/sanitizer_asm.h"
.section .text
.hidden __tsan_trace_switch
.globl __tsan_trace_switch_thunk
__tsan_trace_switch_thunk:
- .cfi_startproc
+ CFI_STARTPROC
# Save scratch registers.
push %rax
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rax, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rax, 0)
push %rcx
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rcx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rcx, 0)
push %rdx
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdx, 0)
push %rsi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rsi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rsi, 0)
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
push %r8
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r8, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r8, 0)
push %r9
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r9, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r9, 0)
push %r10
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r10, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r10, 0)
push %r11
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r11, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r11, 0)
# Align stack frame.
push %rbx # non-scratch
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rbx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rbx, 0)
mov %rsp, %rbx # save current rsp
- .cfi_def_cfa_register %rbx
+ CFI_DEF_CFA_REGISTER(%rbx)
shr $4, %rsp # clear 4 lsb, align to 16
shl $4, %rsp
@@ -45,79 +46,79 @@ __tsan_trace_switch_thunk:
# Unalign stack frame back.
mov %rbx, %rsp # restore the original rsp
- .cfi_def_cfa_register %rsp
+ CFI_DEF_CFA_REGISTER(%rsp)
pop %rbx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
# Restore scratch registers.
pop %r11
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r10
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r9
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r8
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rdi
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rsi
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rdx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rcx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rax
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rax
- .cfi_restore %rbx
- .cfi_restore %rcx
- .cfi_restore %rdx
- .cfi_restore %rsi
- .cfi_restore %rdi
- .cfi_restore %r8
- .cfi_restore %r9
- .cfi_restore %r10
- .cfi_restore %r11
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rax)
+ CFI_RESTORE(%rbx)
+ CFI_RESTORE(%rcx)
+ CFI_RESTORE(%rdx)
+ CFI_RESTORE(%rsi)
+ CFI_RESTORE(%rdi)
+ CFI_RESTORE(%r8)
+ CFI_RESTORE(%r9)
+ CFI_RESTORE(%r10)
+ CFI_RESTORE(%r11)
ret
- .cfi_endproc
+ CFI_ENDPROC
.hidden __tsan_report_race
.globl __tsan_report_race_thunk
__tsan_report_race_thunk:
- .cfi_startproc
+ CFI_STARTPROC
# Save scratch registers.
push %rax
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rax, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rax, 0)
push %rcx
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rcx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rcx, 0)
push %rdx
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdx, 0)
push %rsi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rsi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rsi, 0)
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
push %r8
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r8, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r8, 0)
push %r9
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r9, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r9, 0)
push %r10
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r10, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r10, 0)
push %r11
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %r11, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%r11, 0)
# Align stack frame.
push %rbx # non-scratch
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rbx, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rbx, 0)
mov %rsp, %rbx # save current rsp
- .cfi_def_cfa_register %rbx
+ CFI_DEF_CFA_REGISTER(%rbx)
shr $4, %rsp # clear 4 lsb, align to 16
shl $4, %rsp
@@ -125,51 +126,51 @@ __tsan_report_race_thunk:
# Unalign stack frame back.
mov %rbx, %rsp # restore the original rsp
- .cfi_def_cfa_register %rsp
+ CFI_DEF_CFA_REGISTER(%rsp)
pop %rbx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
# Restore scratch registers.
pop %r11
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r10
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r9
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %r8
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rdi
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rsi
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rdx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rcx
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
pop %rax
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rax
- .cfi_restore %rbx
- .cfi_restore %rcx
- .cfi_restore %rdx
- .cfi_restore %rsi
- .cfi_restore %rdi
- .cfi_restore %r8
- .cfi_restore %r9
- .cfi_restore %r10
- .cfi_restore %r11
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rax)
+ CFI_RESTORE(%rbx)
+ CFI_RESTORE(%rcx)
+ CFI_RESTORE(%rdx)
+ CFI_RESTORE(%rsi)
+ CFI_RESTORE(%rdi)
+ CFI_RESTORE(%r8)
+ CFI_RESTORE(%r9)
+ CFI_RESTORE(%r10)
+ CFI_RESTORE(%r11)
ret
- .cfi_endproc
+ CFI_ENDPROC
.hidden __tsan_setjmp
.comm _ZN14__interception11real_setjmpE,8,8
.globl setjmp
.type setjmp, @function
setjmp:
- .cfi_startproc
+ CFI_STARTPROC
// save env parameter
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
// obtain %rsp
lea 16(%rsp), %rdi
mov %rdi, %rsi
@@ -179,24 +180,24 @@ setjmp:
call __tsan_setjmp
// restore env parameter
pop %rdi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rdi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rdi)
// tail jump to libc setjmp
movl $0, %eax
movq _ZN14__interception11real_setjmpE at GOTPCREL(%rip), %rdx
jmp *(%rdx)
- .cfi_endproc
+ CFI_ENDPROC
.size setjmp, .-setjmp
.comm _ZN14__interception12real__setjmpE,8,8
.globl _setjmp
.type _setjmp, @function
_setjmp:
- .cfi_startproc
+ CFI_STARTPROC
// save env parameter
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
// obtain %rsp
lea 16(%rsp), %rdi
mov %rdi, %rsi
@@ -206,31 +207,31 @@ _setjmp:
call __tsan_setjmp
// restore env parameter
pop %rdi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rdi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rdi)
// tail jump to libc setjmp
movl $0, %eax
movq _ZN14__interception12real__setjmpE at GOTPCREL(%rip), %rdx
jmp *(%rdx)
- .cfi_endproc
+ CFI_ENDPROC
.size _setjmp, .-_setjmp
.comm _ZN14__interception14real_sigsetjmpE,8,8
.globl sigsetjmp
.type sigsetjmp, @function
sigsetjmp:
- .cfi_startproc
+ CFI_STARTPROC
// save env parameter
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
// save savesigs parameter
push %rsi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rsi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rsi, 0)
// align stack frame
sub $8, %rsp
- .cfi_adjust_cfa_offset 8
+ CFI_ADJUST_CFA_OFFSET(8)
// obtain %rsp
lea 32(%rsp), %rdi
mov %rdi, %rsi
@@ -240,38 +241,38 @@ sigsetjmp:
call __tsan_setjmp
// unalign stack frame
add $8, %rsp
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
// restore savesigs parameter
pop %rsi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rsi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rsi)
// restore env parameter
pop %rdi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rdi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rdi)
// tail jump to libc sigsetjmp
movl $0, %eax
movq _ZN14__interception14real_sigsetjmpE at GOTPCREL(%rip), %rdx
jmp *(%rdx)
- .cfi_endproc
+ CFI_ENDPROC
.size sigsetjmp, .-sigsetjmp
.comm _ZN14__interception16real___sigsetjmpE,8,8
.globl __sigsetjmp
.type __sigsetjmp, @function
__sigsetjmp:
- .cfi_startproc
+ CFI_STARTPROC
// save env parameter
push %rdi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rdi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rdi, 0)
// save savesigs parameter
push %rsi
- .cfi_adjust_cfa_offset 8
- .cfi_rel_offset %rsi, 0
+ CFI_ADJUST_CFA_OFFSET(8)
+ CFI_REL_OFFSET(%rsi, 0)
// align stack frame
sub $8, %rsp
- .cfi_adjust_cfa_offset 8
+ CFI_ADJUST_CFA_OFFSET(8)
// obtain %rsp
lea 32(%rsp), %rdi
mov %rdi, %rsi
@@ -281,20 +282,20 @@ __sigsetjmp:
call __tsan_setjmp
// unalign stack frame
add $8, %rsp
- .cfi_adjust_cfa_offset -8
+ CFI_ADJUST_CFA_OFFSET(-8)
// restore savesigs parameter
pop %rsi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rsi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rsi)
// restore env parameter
pop %rdi
- .cfi_adjust_cfa_offset -8
- .cfi_restore %rdi
+ CFI_ADJUST_CFA_OFFSET(-8)
+ CFI_RESTORE(%rdi)
// tail jump to libc sigsetjmp
movl $0, %eax
movq _ZN14__interception16real___sigsetjmpE at GOTPCREL(%rip), %rdx
jmp *(%rdx)
- .cfi_endproc
+ CFI_ENDPROC
.size __sigsetjmp, .-__sigsetjmp
#ifdef __linux__
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