[compiler-rt] r255059 - [PPC64, TSAN] Provide setjmp interceptor support for PPC64
Bill Schmidt via llvm-commits
llvm-commits at lists.llvm.org
Tue Dec 8 14:14:34 PST 2015
Author: wschmidt
Date: Tue Dec 8 16:14:34 2015
New Revision: 255059
URL: http://llvm.org/viewvc/llvm-project?rev=255059&view=rev
Log:
[PPC64, TSAN] Provide setjmp interceptor support for PPC64
This patch provides the assembly support for setjmp/longjmp for use
with the thread sanitizer. This is a big more complicated than for
aarch64, because sibcalls are only legal under our ABIs if the TOC
pointer is unchanged. Since the true setjmp function trashes the TOC
pointer, and we have to leave the stack in a correct state, we emulate
the setjmp function rather than branching to it.
We also need to materialize the TOC for cases where the _setjmp code
is called from libc. This is done differently under the ELFv1 and
ELFv2 ABIs.
Added:
compiler-rt/trunk/lib/tsan/rtl/tsan_ppc_regs.h
compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_ppc64.S
Modified:
compiler-rt/trunk/lib/tsan/CMakeLists.txt
compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
Modified: compiler-rt/trunk/lib/tsan/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/CMakeLists.txt?rev=255059&r1=255058&r2=255059&view=diff
==============================================================================
--- compiler-rt/trunk/lib/tsan/CMakeLists.txt (original)
+++ compiler-rt/trunk/lib/tsan/CMakeLists.txt Tue Dec 8 16:14:34 2015
@@ -151,6 +151,11 @@ else()
# Pass ASM file directly to the C++ compiler.
set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
LANGUAGE C)
+ elseif(arch MATCHES "powerpc64|powerpc64le")
+ set(TSAN_ASM_SOURCES rtl/tsan_rtl_ppc64.S)
+ # Pass ASM file directly to the C++ compiler.
+ set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
+ LANGUAGE C)
else()
set(TSAN_ASM_SOURCES)
endif()
Modified: compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc?rev=255059&r1=255058&r2=255059&view=diff
==============================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc (original)
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc Tue Dec 8 16:14:34 2015
@@ -445,7 +445,9 @@ static void SetJmp(ThreadState *thr, upt
}
static void LongJmp(ThreadState *thr, uptr *env) {
-#if SANITIZER_FREEBSD || SANITIZER_MAC
+#ifdef __powerpc__
+ uptr mangled_sp = env[0];
+#elif SANITIZER_FREEBSD || SANITIZER_MAC
uptr mangled_sp = env[2];
#elif defined(SANITIZER_LINUX)
# ifdef __aarch64__
@@ -453,7 +455,7 @@ static void LongJmp(ThreadState *thr, up
# else
uptr mangled_sp = env[6];
# endif
-#endif // SANITIZER_FREEBSD
+#endif
// Find the saved buf by mangled_sp.
for (uptr i = 0; i < thr->jmp_bufs.Size(); i++) {
JmpBuf *buf = &thr->jmp_bufs[i];
Added: compiler-rt/trunk/lib/tsan/rtl/tsan_ppc_regs.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_ppc_regs.h?rev=255059&view=auto
==============================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_ppc_regs.h (added)
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_ppc_regs.h Tue Dec 8 16:14:34 2015
@@ -0,0 +1,96 @@
+#define r0 0
+#define r1 1
+#define r2 2
+#define r3 3
+#define r4 4
+#define r5 5
+#define r6 6
+#define r7 7
+#define r8 8
+#define r9 9
+#define r10 10
+#define r11 11
+#define r12 12
+#define r13 13
+#define r14 14
+#define r15 15
+#define r16 16
+#define r17 17
+#define r18 18
+#define r19 19
+#define r20 20
+#define r21 21
+#define r22 22
+#define r23 23
+#define r24 24
+#define r25 25
+#define r26 26
+#define r27 27
+#define r28 28
+#define r29 29
+#define r30 30
+#define r31 31
+#define f0 0
+#define f1 1
+#define f2 2
+#define f3 3
+#define f4 4
+#define f5 5
+#define f6 6
+#define f7 7
+#define f8 8
+#define f9 9
+#define f10 10
+#define f11 11
+#define f12 12
+#define f13 13
+#define f14 14
+#define f15 15
+#define f16 16
+#define f17 17
+#define f18 18
+#define f19 19
+#define f20 20
+#define f21 21
+#define f22 22
+#define f23 23
+#define f24 24
+#define f25 25
+#define f26 26
+#define f27 27
+#define f28 28
+#define f29 29
+#define f30 30
+#define f31 31
+#define v0 0
+#define v1 1
+#define v2 2
+#define v3 3
+#define v4 4
+#define v5 5
+#define v6 6
+#define v7 7
+#define v8 8
+#define v9 9
+#define v10 10
+#define v11 11
+#define v12 12
+#define v13 13
+#define v14 14
+#define v15 15
+#define v16 16
+#define v17 17
+#define v18 18
+#define v19 19
+#define v20 20
+#define v21 21
+#define v22 22
+#define v23 23
+#define v24 24
+#define v25 25
+#define v26 26
+#define v27 27
+#define v28 28
+#define v29 29
+#define v30 30
+#define v31 31
Added: compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_ppc64.S
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_ppc64.S?rev=255059&view=auto
==============================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_ppc64.S (added)
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_rtl_ppc64.S Tue Dec 8 16:14:34 2015
@@ -0,0 +1,288 @@
+#include "tsan_ppc_regs.h"
+
+ .section .text
+ .hidden __tsan_setjmp
+ .globl _setjmp
+ .type _setjmp, @function
+ .align 4
+#if _CALL_ELF == 2
+_setjmp:
+#else
+ .section ".opd","aw"
+ .align 3
+_setjmp:
+ .quad .L._setjmp,.TOC. at tocbase,0
+ .previous
+#endif
+.L._setjmp:
+ mflr r0
+ stdu r1,-48(r1)
+ std r2,24(r1)
+ std r3,32(r1)
+ std r0,40(r1)
+ // r3 is the original stack pointer.
+ addi r3,r1,48
+ // r4 is the mangled stack pointer (see glibc)
+ ld r4,-28696(r13)
+ xor r4,r3,r4
+ // Materialize a TOC in case we were called from libc.
+ // For big-endian, we load the TOC from the OPD. For little-
+ // endian, we use the .TOC. symbol to find it.
+ nop
+ bcl 20,31,0f
+0:
+ mflr r2
+#if _CALL_ELF == 2
+ addis r2,r2,.TOC.-0b at ha
+ addi r2,r2,.TOC.-0b at l
+#else
+ addis r2,r2,_setjmp-0b at ha
+ addi r2,r2,_setjmp-0b at l
+ ld r2,8(r2)
+#endif
+ // Call the interceptor.
+ bl __tsan_setjmp
+ nop
+ // Restore regs needed for setjmp.
+ ld r3,32(r1)
+ ld r0,40(r1)
+ // Emulate the real setjmp function. We do this because we can't
+ // perform a sibcall: The real setjmp function trashes the TOC
+ // pointer, and with a sibcall we have no way to restore it.
+ // This way we can make sure our caller's stack pointer and
+ // link register are saved correctly in the jmpbuf.
+ ld r6,-28696(r13)
+ addi r5,r1,48 // original stack ptr of caller
+ xor r5,r6,r5
+ std r5,0(r3) // mangled stack ptr of caller
+ ld r5,24(r1)
+ std r5,8(r3) // caller's saved TOC pointer
+ xor r0,r6,r0
+ std r0,16(r3) // caller's mangled return address
+ mfcr r0
+ // Nonvolatiles.
+ std r14,24(r3)
+ stfd f14,176(r3)
+ stw r0,172(r3) // CR
+ std r15,32(r3)
+ stfd f15,184(r3)
+ std r16,40(r3)
+ stfd f16,192(r3)
+ std r17,48(r3)
+ stfd f17,200(r3)
+ std r18,56(r3)
+ stfd f18,208(r3)
+ std r19,64(r3)
+ stfd f19,216(r3)
+ std r20,72(r3)
+ stfd f20,224(r3)
+ std r21,80(r3)
+ stfd f21,232(r3)
+ std r22,88(r3)
+ stfd f22,240(r3)
+ std r23,96(r3)
+ stfd f23,248(r3)
+ std r24,104(r3)
+ stfd f24,256(r3)
+ std r25,112(r3)
+ stfd f25,264(r3)
+ std r26,120(r3)
+ stfd f26,272(r3)
+ std r27,128(r3)
+ stfd f27,280(r3)
+ std r28,136(r3)
+ stfd f28,288(r3)
+ std r29,144(r3)
+ stfd f29,296(r3)
+ std r30,152(r3)
+ stfd f30,304(r3)
+ std r31,160(r3)
+ stfd f31,312(r3)
+ addi r5,r3,320
+ mfvrsave r0
+ stw r0,168(r3) // VRSAVE
+ addi r6,r5,16
+ stvx v20,0,r5
+ addi r5,r5,32
+ stvx v21,0,r6
+ addi r6,r6,32
+ stvx v22,0,r5
+ addi r5,r5,32
+ stvx v23,0,r6
+ addi r6,r6,32
+ stvx v24,0,r5
+ addi r5,r5,32
+ stvx v25,0,r6
+ addi r6,r6,32
+ stvx v26,0,r5
+ addi r5,r5,32
+ stvx v27,0,r6
+ addi r6,r6,32
+ stvx v28,0,r5
+ addi r5,r5,32
+ stvx v29,0,r6
+ addi r6,r6,32
+ stvx v30,0,r5
+ stvx v31,0,r6
+ // Clear the "mask-saved" slot.
+ li r4,0
+ stw r4,512(r3)
+ // Restore TOC, LR, and stack and return to caller.
+ ld r2,24(r1)
+ ld r0,40(r1)
+ addi r1,r1,48
+ li r3,0 // This is the setjmp return path
+ mtlr r0
+ blr
+ .size _setjmp, .-.L._setjmp
+
+ .globl setjmp
+ .type setjmp, @function
+ .align 4
+setjmp:
+ b _setjmp
+ .size setjmp, .-setjmp
+
+ // sigsetjmp is like setjmp, except that the mask in r4 needs
+ // to be saved at offset 512 of the jump buffer.
+ .globl __sigsetjmp
+ .type __sigsetjmp, @function
+ .align 4
+#if _CALL_ELF == 2
+__sigsetjmp:
+#else
+ .section ".opd","aw"
+ .align 3
+__sigsetjmp:
+ .quad .L.__sigsetjmp,.TOC. at tocbase,0
+ .previous
+#endif
+.L.__sigsetjmp:
+ mflr r0
+ stdu r1,-64(r1)
+ std r2,24(r1)
+ std r3,32(r1)
+ std r4,40(r1)
+ std r0,48(r1)
+ // r3 is the original stack pointer.
+ addi r3,r1,64
+ // r4 is the mangled stack pointer (see glibc)
+ ld r4,-28696(r13)
+ xor r4,r3,r4
+ // Materialize a TOC in case we were called from libc.
+ // For big-endian, we load the TOC from the OPD. For little-
+ // endian, we use the .TOC. symbol to find it.
+ nop
+ bcl 20,31,1f
+1:
+ mflr r2
+#if _CALL_ELF == 2
+ addis r2,r2,.TOC.-1b at ha
+ addi r2,r2,.TOC.-1b at l
+#else
+ addis r2,r2,_setjmp-1b at ha
+ addi r2,r2,_setjmp-1b at l
+ ld r2,8(r2)
+#endif
+ // Call the interceptor.
+ bl __tsan_setjmp
+ nop
+ // Restore regs needed for __sigsetjmp.
+ ld r3,32(r1)
+ ld r4,40(r1)
+ ld r0,48(r1)
+ // Emulate the real sigsetjmp function. We do this because we can't
+ // perform a sibcall: The real sigsetjmp function trashes the TOC
+ // pointer, and with a sibcall we have no way to restore it.
+ // This way we can make sure our caller's stack pointer and
+ // link register are saved correctly in the jmpbuf.
+ ld r6,-28696(r13)
+ addi r5,r1,64 // original stack ptr of caller
+ xor r5,r6,r5
+ std r5,0(r3) // mangled stack ptr of caller
+ ld r5,24(r1)
+ std r5,8(r3) // caller's saved TOC pointer
+ xor r0,r6,r0
+ std r0,16(r3) // caller's mangled return address
+ mfcr r0
+ // Nonvolatiles.
+ std r14,24(r3)
+ stfd f14,176(r3)
+ stw r0,172(r3) // CR
+ std r15,32(r3)
+ stfd f15,184(r3)
+ std r16,40(r3)
+ stfd f16,192(r3)
+ std r17,48(r3)
+ stfd f17,200(r3)
+ std r18,56(r3)
+ stfd f18,208(r3)
+ std r19,64(r3)
+ stfd f19,216(r3)
+ std r20,72(r3)
+ stfd f20,224(r3)
+ std r21,80(r3)
+ stfd f21,232(r3)
+ std r22,88(r3)
+ stfd f22,240(r3)
+ std r23,96(r3)
+ stfd f23,248(r3)
+ std r24,104(r3)
+ stfd f24,256(r3)
+ std r25,112(r3)
+ stfd f25,264(r3)
+ std r26,120(r3)
+ stfd f26,272(r3)
+ std r27,128(r3)
+ stfd f27,280(r3)
+ std r28,136(r3)
+ stfd f28,288(r3)
+ std r29,144(r3)
+ stfd f29,296(r3)
+ std r30,152(r3)
+ stfd f30,304(r3)
+ std r31,160(r3)
+ stfd f31,312(r3)
+ addi r5,r3,320
+ mfvrsave r0
+ stw r0,168(r3) // VRSAVE
+ addi r6,r5,16
+ stvx v20,0,r5
+ addi r5,r5,32
+ stvx v21,0,r6
+ addi r6,r6,32
+ stvx v22,0,r5
+ addi r5,r5,32
+ stvx v23,0,r6
+ addi r6,r6,32
+ stvx v24,0,r5
+ addi r5,r5,32
+ stvx v25,0,r6
+ addi r6,r6,32
+ stvx v26,0,r5
+ addi r5,r5,32
+ stvx v27,0,r6
+ addi r6,r6,32
+ stvx v28,0,r5
+ addi r5,r5,32
+ stvx v29,0,r6
+ addi r6,r6,32
+ stvx v30,0,r5
+ stvx v31,0,r6
+ // Save into the "mask-saved" slot.
+ stw r4,512(r3)
+ // Restore TOC, LR, and stack and return to caller.
+ ld r2,24(r1)
+ ld r0,48(r1)
+ addi r1,r1,64
+ li r3,0 // This is the sigsetjmp return path
+ mtlr r0
+ blr
+ .size __sigsetjmp, .-.L.__sigsetjmp
+
+ .globl sigsetjmp
+ .type sigsetjmp, @function
+ .align 4
+sigsetjmp:
+ b __sigsetjmp
+ .size sigsetjmp, .-sigsetjmp
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