instrument for libc.so (arm64) failed due to need DT_FINI or DT_FINI_ARRAY

[zhouyu0502]

i want to bolt instrument for libc.so (arm64) ,but failed

llvm-bolt libc.so.6 --instrument -o libc.bolt.so.6
BOLT-INFO: shared object or position-independent executable detected
BOLT-INFO: Target architecture: aarch64
BOLT-INFO: BOLT version: 6abb626
BOLT-INFO: first alloc address is 0x0
BOLT-INFO: creating new program header table at address 0x200000, offset 0x200000
BOLT-WARNING: debug info will be stripped from the binary. Use -update-debug-sections to keep it.
BOLT-INFO: enabling relocation mode
BOLT-INFO: forcing -jump-tables=move for instrumentation
./../../llvmori/build/bin/llvm-bolt: 'libc.so.6': Instrumentation needs either DT_FINI or DT_FINI_ARRAY.

[llvmbot]

@llvm/issue-subscribers-libc

Author: None (zhouyu0502)

i want to bolt instrument for libc.so (arm64) ,but failed

llvm-bolt libc.so.6 --instrument -o libc.bolt.so.6
BOLT-INFO: shared object or position-independent executable detected
BOLT-INFO: Target architecture: aarch64
BOLT-INFO: BOLT version: 6abb626
BOLT-INFO: first alloc address is 0x0
BOLT-INFO: creating new program header table at address 0x200000, offset 0x200000
BOLT-WARNING: debug info will be stripped from the binary. Use -update-debug-sections to keep it.
BOLT-INFO: enabling relocation mode
BOLT-INFO: forcing -jump-tables=move for instrumentation
./../../llvmori/build/bin/llvm-bolt: 'libc.so.6': Instrumentation needs either DT_FINI or DT_FINI_ARRAY.

[llvmbot]

@llvm/issue-subscribers-bolt

Author: None (zhouyu0502)

i want to bolt instrument for libc.so (arm64) ,but failed

llvm-bolt libc.so.6 --instrument -o libc.bolt.so.6
BOLT-INFO: shared object or position-independent executable detected
BOLT-INFO: Target architecture: aarch64
BOLT-INFO: BOLT version: 6abb626
BOLT-INFO: first alloc address is 0x0
BOLT-INFO: creating new program header table at address 0x200000, offset 0x200000
BOLT-WARNING: debug info will be stripped from the binary. Use -update-debug-sections to keep it.
BOLT-INFO: enabling relocation mode
BOLT-INFO: forcing -jump-tables=move for instrumentation
./../../llvmori/build/bin/llvm-bolt: 'libc.so.6': Instrumentation needs either DT_FINI or DT_FINI_ARRAY.

[paschalis-mpeis]

I believe @kaadam is prototyping a solution?

[zhouyu0502]

any update?

[zhouyu0502]

i have add

static void fini(void) {}
static void (*fini_p)(void) __attribute__((section(".fini_array"), used)) = fini;

for glibc and it shows have FINI_ARRAY and works ok in arm64,

however,after i exe
llvm-bolt --instrument --instrumentation-sleep-time=30 libc.so.6 -o libc.so.30s.6

i push this instrmented so to device and the device cannot boot

can you tell me why and how can i fix this problem

[zhouyu0502]

any update?

[kaadam]

@zhouyu0502 Hi, sorry, I missed this thread. Yes, I'm working on a solution, you can see the draft change here. Could you try it whether it solves your issue?

[zhouyu0502]

@zhouyu0502 Hi, sorry, I missed this thread. Yes, I'm working on a solution, you can see the draft change here. Could you try it whether it solves your issue?

thank you for your reply and i will try .