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merged 2 commits into from
Nov 5, 2024
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[XRay][AArch64] Support -fxray-shared #114431

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63760cf
[XRay][AArch64] Support -fxray-shared
sebastiankreutzer Oct 31, 2024
ab01281
fixup! [XRay][AArch64] Support -fxray-shared
sebastiankreutzer Nov 4, 2024
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8 changes: 6 additions & 2 deletions clang/lib/Driver/XRayArgs.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -67,8 +67,12 @@ XRayArgs::XRayArgs(const ToolChain &TC, const ArgList &Args) {
false)) {
XRayShared = true;

// DSO instrumentation is currently limited to x86_64
if (Triple.getArch() != llvm::Triple::x86_64) {
// DSO instrumentation is currently limited to x86_64 and aarch64
switch (Triple.getArch()) {
case llvm::Triple::x86_64:
case llvm::Triple::aarch64:
break;
default:
D.Diag(diag::err_drv_unsupported_opt_for_target)
<< "-fxray-shared" << Triple.str();
}
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16 changes: 11 additions & 5 deletions clang/test/Driver/XRay/xray-shared.cpp
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@@ -1,15 +1,21 @@
// Check supported targets
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s
// RUN: %clang -### --target=aarch64-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s

// Check unsupported targets
// RUN: not %clang -### --target=arm-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET
// RUN: not %clang -### --target=mips-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET
// RUN: not %clang -### --target=loongarch64-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET
// RUN: not %clang -### --target=hexagon-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET
// RUN: not %clang -### --target=powerpc64le-unknown-linux-gnu -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET

// Check PIC requirement
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fpic -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s
// RUN: not %clang -### --target=x86_64-unknown-linux-gnu -fno-PIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-PIC
// RUN: not %clang -### --target=x86_64-unknown-linux-gnu -fno-pic -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-PIC

// On 64 bit darwin, PIC is always enabled
// RUN: %clang -### --target=x86_64-apple-darwin -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s

// Check unsupported targets
// RUN: not %clang -### --target=aarch64-pc-freebsd -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET
// RUN: not %clang -### --target=arm64-apple-macos -fPIC -fxray-instrument -fxray-shared -c %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR-TARGET

// CHECK: "-cc1" {{.*}}"-fxray-instrument" {{.*}}"-fxray-shared"
// ERR-TARGET: error: unsupported option '-fxray-shared' for target
// ERR-PIC: error: option '-fxray-shared' cannot be specified without '-fPIC'
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2 changes: 1 addition & 1 deletion compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
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Expand Up @@ -104,7 +104,7 @@ else()
set(ALL_XRAY_SUPPORTED_ARCH ${X86_64} ${ARM32} ${ARM64} ${MIPS32} ${MIPS64}
powerpc64le ${HEXAGON} ${LOONGARCH64})
endif()
set(ALL_XRAY_DSO_SUPPORTED_ARCH ${X86_64})
set(ALL_XRAY_DSO_SUPPORTED_ARCH ${X86_64} ${ARM64})
set(ALL_SHADOWCALLSTACK_SUPPORTED_ARCH ${ARM64})

if (UNIX)
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4 changes: 4 additions & 0 deletions compiler-rt/lib/xray/CMakeLists.txt
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Expand Up @@ -56,6 +56,10 @@ set(aarch64_SOURCES
xray_trampoline_AArch64.S
)

set(aarch64_DSO_SOURCES
xray_trampoline_AArch64.S
)

set(loongarch64_SOURCES
xray_loongarch64.cpp
xray_trampoline_loongarch64.S
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32 changes: 18 additions & 14 deletions compiler-rt/lib/xray/xray_trampoline_AArch64.S
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Expand Up @@ -26,6 +26,17 @@
ldp x1, x2, [sp], #16
.endm

.macro LOAD_HANDLER_ADDR reg handler
#if !defined(XRAY_PIC)
adrp \reg, ASM_SYMBOL(\handler)
ldr \reg, [\reg, :lo12:ASM_SYMBOL(\handler)]
#else
adrp \reg, :got:ASM_SYMBOL(\handler)
ldr \reg, [\reg, :got_lo12:ASM_SYMBOL(\handler)]
ldr \reg, [\reg]
#endif
.endm

.text
.p2align 2
.global ASM_SYMBOL(__xray_FunctionEntry)
Expand All @@ -42,8 +53,7 @@ ASM_SYMBOL(__xray_FunctionEntry):
SAVE_REGISTERS

// Load the handler function pointer.
adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
LOAD_HANDLER_ADDR x2, _ZN6__xray19XRayPatchedFunctionE
cbz x2, 1f
// Set w0 to the function ID (w17). Set x1 to XRayEntryType::ENTRY = 0.
mov w0, w17
Expand All @@ -69,8 +79,7 @@ ASM_SYMBOL(__xray_FunctionExit):
SAVE_REGISTERS

// Load the handler function pointer into x2.
adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
LOAD_HANDLER_ADDR x2, _ZN6__xray19XRayPatchedFunctionE
cbz x2, 1f
// Set w0 to the function ID (w17). Set x1 to XRayEntryType::EXIT = 1.
mov w0, w17
Expand All @@ -96,8 +105,7 @@ ASM_SYMBOL(__xray_FunctionTailExit):
// Save the registers which may be modified by the handler function.
SAVE_REGISTERS
// Load the handler function pointer into x2.
adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
LOAD_HANDLER_ADDR x2, _ZN6__xray19XRayPatchedFunctionE
cbz x2, 1f
// Set w0 to the function ID (w17). Set x1 to XRayEntryType::TAIL = 2.
mov w0, w17
Expand All @@ -118,13 +126,11 @@ ASM_SYMBOL(__xray_ArgLoggerEntry):
// Push the registers which may be modified by the handler function.
SAVE_REGISTERS

adrp x8, ASM_SYMBOL(_ZN6__xray13XRayArgLoggerE)
ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray13XRayArgLoggerE)]
LOAD_HANDLER_ADDR x8, _ZN6__xray13XRayArgLoggerE
cbnz x8, 2f

// Load the handler function pointer.
adrp x8, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
LOAD_HANDLER_ADDR x8, _ZN6__xray19XRayPatchedFunctionE
cbz x8, 1f

2:
Expand All @@ -144,8 +150,7 @@ ASM_SIZE(__xray_ArgLoggerEntry)
ASM_TYPE_FUNCTION(__xray_CustomEvent)
ASM_SYMBOL(__xray_CustomEvent):
SAVE_REGISTERS
adrp x8, ASM_SYMBOL(_ZN6__xray22XRayPatchedCustomEventE)
ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray22XRayPatchedCustomEventE)]
LOAD_HANDLER_ADDR x8, _ZN6__xray22XRayPatchedCustomEventE
cbz x8, 1f
blr x8
1:
Expand All @@ -157,8 +162,7 @@ ASM_SIZE(__xray_CustomEvent)
ASM_TYPE_FUNCTION(__xray_TypedEvent)
ASM_SYMBOL(__xray_TypedEvent):
SAVE_REGISTERS
adrp x8, ASM_SYMBOL(_ZN6__xray21XRayPatchedTypedEventE)
ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray21XRayPatchedTypedEventE)]
LOAD_HANDLER_ADDR x8, _ZN6__xray21XRayPatchedTypedEventE
cbz x8, 1f
blr x8
1:
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3 changes: 2 additions & 1 deletion compiler-rt/test/xray/TestCases/Posix/basic-mode-dso.cpp
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Expand Up @@ -8,7 +8,8 @@
// RUN: %llvm_xray account --format=csv --sort=funcid "`ls basic-mode-dso-* | head -1`" | FileCheck --check-prefix=ACCOUNT %s
// RUN: rm basic-mode-dso-*

// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}
// REQUIRES: built-in-llvm-tree

//--- main.cpp

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2 changes: 1 addition & 1 deletion compiler-rt/test/xray/TestCases/Posix/clang-xray-shared.cpp
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Expand Up @@ -6,7 +6,7 @@
// RUN: %clangxx -fxray-instrument %s -shared -o %t.so
// RUN: llvm-nm %t.so | FileCheck %s --check-prefix DISABLED
//
// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}

[[clang::xray_always_instrument]] int always_instrumented() { return 42; }

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2 changes: 1 addition & 1 deletion compiler-rt/test/xray/TestCases/Posix/dlopen.cpp
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Expand Up @@ -7,7 +7,7 @@
//
// RUN: XRAY_OPTIONS="patch_premain=true" %run %t/main.o %t/testlib.so 2>&1 | FileCheck %s

// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}

//--- main.cpp

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2 changes: 1 addition & 1 deletion compiler-rt/test/xray/TestCases/Posix/dso-dep-chains.cpp
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Expand Up @@ -17,7 +17,7 @@
//
// RUN: XRAY_OPTIONS="patch_premain=true" %run %t/main.o %t/testlibd.so %t/testlibe.so 2>&1 | FileCheck %s

// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}

//--- main.cpp

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2 changes: 1 addition & 1 deletion compiler-rt/test/xray/TestCases/Posix/patch-premain-dso.cpp
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Expand Up @@ -6,7 +6,7 @@

// RUN: XRAY_OPTIONS="patch_premain=true,verbosity=1" %run %t/main.o 2>&1 | FileCheck %s

// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}

//--- main.cpp

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2 changes: 1 addition & 1 deletion compiler-rt/test/xray/TestCases/Posix/patching-unpatching-dso.cpp
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Expand Up @@ -8,7 +8,7 @@

// RUN: XRAY_OPTIONS="patch_premain=false" %run %t/main.o 2>&1 | FileCheck %s

// REQUIRES: target=x86_64{{.*}}
// REQUIRES: target={{(aarch64|x86_64)-.*}}

//--- main.cpp

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