NodeJS segfaults for some tests on big-endian linux-ppc64

[glaubitz]

Trying to build node on big-endian linux-ppc64 (PowerPC 970 baseline) fails with:

(sid_ppc64-dchroot)glaubitz@perotto:~/node$ LD_LIBRARY_PATH=/home/glaubitz/node/out/Release/lib.host:/home/glaubitz/node/out/Release/lib.target:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH; cd ../tools/v8_gypfiles; mkdir -p /home/glaubitz/node/out/Release/obj.target/v8_snapshot/geni; "/home/glaubitz/node/out/Release/mksnapshot" --turbo_instruction_scheduling --stress-turbo-late-spilling "--target_os=linux" "--target_arch=ppc64" --startup_src "/home/glaubitz/node/out/Release/obj.target/v8_snapshot/geni/snapshot.cc" --embedded_variant Default --embedded_src "/home/glaubitz/node/out/Release/obj.target/v8_snapshot/geni/embedded.S" --concurrent-builtin-generation "--concurrent-turbofan-max-threads=0" --no-native-code-counters
-bash: cd: ../tools/v8_gypfiles: No such file or directory


#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #22: Store *(#21 + 55 + #14*8) = #20 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff8b7ec940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #21: Store *(#20 + 55 + #3*8) = #19 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff954ec940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #22: Store *(#21 + 55 + #14*8) = #20 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff8afdc940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #21: Store *(#20 + 55 + #3*8) = #19 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff94cdc940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #21: Store *(#20 + 55 + #3*8) = #19 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff8a7cc940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #22: Store *(#21 + 55 + #14*8) = #20 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff8bffc940
==== C stack trace ===============================



#
# Fatal error in , line 0
# MemoryOptimizationReducer could not remove write barrier for operation
  #22: Store *(#21 + 55 + #6*8) = #20 [raw, AnyTagged, AssertNoWriteBarrier, element size: 2^3, offset: 55]

#
#
#
#FailureMessage Object: 0x7fff95cfc940
==== C stack trace ===============================

    /home/glaubitz/node/out/Release/mksnapshot(v8::base::debug::StackTrace::StackTrace()-0x7d6eac) [0x11596cd14]
    /home/glaubitz/node/out/Release/mksnapshot(+0x1c051f4) [0x113ee51f4]
    /home/glaubitz/node/out/Release/mksnapshot(V8_Fatal(char const*, ...)-0x219df1c) [0x113ed0014]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::turboshaft::MemoryAnalyzer::SkipWriteBarrier(v8::internal::compiler::turboshaft::StoreOp const&)-0x16228b0) [0x114ad2b00]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::turboshaft::MemoryAnalyzer::ProcessStore(v8::internal::compiler::turboshaft::StoreOp const&)-0x162198c) [0x114ad3a6c]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::turboshaft::MemoryAnalyzer::Process(v8::internal::compiler::turboshaft::Operation const&)-0x1620dbc) [0x114ad4684]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::turboshaft::MemoryAnalyzer::Run()-0x1620c54) [0x114ad4804]
    /home/glaubitz/node/out/Release/mksnapshot(+0x27de618) [0x114abe618]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::turboshaft::BuiltinPipeline::OptimizeBuiltin()-0x1d03ebc) [0x1143bbf2c]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::compiler::CodeAssemblerTurboshaftCompilationJob::ExecuteJobImpl(v8::internal::RuntimeCallStats*, v8::internal::LocalIsolate*)-0x1fc7f5c) [0x1140dfcdc]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::OptimizedCompilationJob::ExecuteJob(v8::internal::RuntimeCallStats*, v8::internal::LocalIsolate*)-0x2e17128) [0x1131c2d70]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::OptimizingCompileTaskExecutor::CompileNext(v8::internal::Isolate*, v8::internal::LocalIsolate&, v8::internal::TurbofanCompilationJob*)-0x2dddb84) [0x113200bd4]
    /home/glaubitz/node/out/Release/mksnapshot(v8::internal::OptimizingCompileTaskExecutor::CompileTask::Run(v8::JobDelegate*)-0x2ddd998) [0x113200dd8]
    /home/glaubitz/node/out/Release/mksnapshot(v8::platform::DefaultJobWorker::Run()-0x218998c) [0x113ee6644]
    /home/glaubitz/node/out/Release/mksnapshot(v8::platform::DefaultWorkerThreadsTaskRunner::WorkerThread::Run()-0x21865f8) [0x113ee9c30]
    /home/glaubitz/node/out/Release/mksnapshot(+0x1bfd1f4) [0x113edd1f4]
    /lib/powerpc64-linux-gnu/libc.so.6(+0xa43b4) [0x7fff980843b4]

It has worked in the past but I have not verified yet when it broke on this target.

[juanarbol]

Hey thanks!

Could you please provide more details?

Which Node.js version, what Node.js version used to work. More about the environment you're running Node.js on.

Although, PPC is not officially supported by V8; and from our side, there is not that much we can do (I personally don't have any device to test on, and I have never built something for ppc64)

Refs:
https://v8.dev/docs/ports#ppc-(not-officially-supported)

[glaubitz]

Hey thanks!

Could you please provide more details?

Sure, I can do that.

Which Node.js version, what Node.js version used to work. More about the environment you're running Node.js on.

This is directly from git:

glaubitz@perotto:~/node$ git rev-parse --short HEAD
a822a1cbe7
glaubitz@perotto:~/node$

On Debian unstable:

glaubitz@perotto:~/node$ uname -a
Linux perotto 6.12.22-powerpc64-64k #1 SMP Debian 6.12.22-1 (2025-04-10) ppc64 GNU/Linux
glaubitz@perotto:~/node$

gcc has the following preprocessor definitions:

glaubitz@perotto:~/node$ echo | gcc -E -dM -
#define __DBL_MIN_EXP__ (-1021)
#define __LDBL_MANT_DIG__ 106
#define __builtin_vsx_xvmsubmsp __builtin_vsx_xvmsubsp
#define __ATOMIC_ACQUIRE 2
#define __WCHAR_MAX__ 0x7fffffff
#define __GCC_IEC_559_COMPLEX 2
#define __SIZEOF_LONG__ 8
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __FLT32X_IS_IEC_60559__ 1
#define _CALL_AIXDESC 1
#define __CHAR_BIT__ 8
#define _ARCH_PPCGR 1
#define __UINT8_MAX__ 0xff
#define __builtin_vsx_xvmsubmdp __builtin_vsx_xvmsubdp
#define __builtin_vsx_xvnmaddadp __builtin_vsx_xvnmadddp
#define __WINT_MAX__ 0xffffffffU
#define __FLT32_MIN_EXP__ (-125)
#define __PPC64__ 1
#define __RECIPF__ 1
#define __builtin_vsx_xvnmsubmdp __builtin_vsx_xvnmsubdp
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 0xffffffffffffffffUL
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
#define __DBL_DENORM_MIN__ ((double)4.94065645841246544176568792868221e-324L)
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
#define __GCC_IEC_559 2
#define __FLT32X_DECIMAL_DIG__ 17
#define __FLT_EVAL_METHOD__ 0
#define __FLT64_DECIMAL_DIG__ 17
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
#define pixel pixel
#define _ARCH_PPCSQ 1
#define bool bool
#define __STDC_IEC_559__ 1
#define __UINT_FAST64_MAX__ 0xffffffffffffffffUL
#define __SIG_ATOMIC_TYPE__ int
#define __UINT_LEAST64_MAX__ 0xffffffffffffffffUL
#define __GNUC_PATCHLEVEL__ 0
#define __FLT32_HAS_DENORM__ 1
#define __builtin_vsx_xvnmaddasp __builtin_vsx_xvnmaddsp
#define __UINT_FAST8_MAX__ 0xff
#define __FLT32_MAX_10_EXP__ 38
#define __DEC64_MAX_EXP__ 385
#define __INT8_C(c) c
#define __INT_LEAST8_WIDTH__ 8
#define __STDC_HOSTED__ 1
#define __SHRT_MAX__ 0x7fff
#define __LDBL_MAX__ 1.79769313486231580793728971405301e+308L
#define __LDBL_IS_IEC_60559__ 0
#define __UINT_LEAST8_MAX__ 0xff
#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __FLT_EVAL_METHOD_TS_18661_3__ 0
#define __UINT32_MAX__ 0xffffffffU
#define __LDBL_MAX_EXP__ 1024
#define __WINT_MIN__ 0U
#define __builtin_vsx_xvmaddmdp __builtin_vsx_xvmadddp
#define __builtin_vsx_vperm __builtin_vec_perm
#define __INT_LEAST16_WIDTH__ 16
#define __SCHAR_MAX__ 0x7f
#define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
#define vector vector
#define __builtin_vsx_xvnmsubmsp __builtin_vsx_xvnmsubsp
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __FLT32X_MAX_EXP__ 1024
#define __unix 1
#define __UINT_LEAST16_MAX__ 0xffff
#define __SIZEOF_INT__ 4
#define __FLT32X_MANT_DIG__ 53
#define __DEC64_MIN_EXP__ (-382)
#define __builtin_vsx_xvmaddmsp __builtin_vsx_xvmaddsp
#define __INT64_C(c) c ## L
#define __CMODEL_MEDIUM__ 1
#define __DBL_DIG__ 15
#define __FLT_EPSILON__ 1.19209289550781250000000000000000e-7F
#define __powerpc__ 1
#define __SHRT_WIDTH__ 16
#define __FLT32_IS_IEC_60559__ 1
#define __LDBL_MIN__ 2.00416836000897277799610805135016e-292L
#define __STDC_UTF_16__ 1
#define __DBL_IS_IEC_60559__ 1
#define __DEC32_MAX__ 9.999999E96DF
#define __FP_FAST_FMA 1
#define __LONG_MAX__ 0x7fffffffffffffffL
#define __SIZEOF_IBM128__ 16
#define __INT32_MAX__ 0x7fffffff
#define __unix__ 1
#define __INT_WIDTH__ 32
#define __STDC_ISO_10646__ 201706L
#define __DECIMAL_DIG__ 33
#define __STDC_IEC_559_COMPLEX__ 1
#define __FLT64_EPSILON__ 2.22044604925031308084726333618164e-16F64
#define __gnu_linux__ 1
#define __INT16_MAX__ 0x7fff
#define __LDBL_HAS_QUIET_NAN__ 1
#define __FLT64_MANT_DIG__ 53
#define _CALL_LINUX 1
#define __FLT_MIN__ 1.17549435082228750796873653722225e-38F
#define __GNUC__ 14
#define __pie__ 2
#define __FLT_HAS_DENORM__ 1
#define __SIZEOF_LONG_DOUBLE__ 16
#define __powerpc64__ 1
#define __LDBL_MIN_EXP__ (-968)
#define __BIGGEST_ALIGNMENT__ 16
#define __FLT64_MAX_10_EXP__ 308
#define __WCHAR_TYPE__ int
#define __DBL_MAX__ ((double)1.79769313486231570814527423731704e+308L)
#define __INT_FAST32_MAX__ 0x7fffffffffffffffL
#define __DBL_HAS_INFINITY__ 1
#define __FLT64_DENORM_MIN__ 4.94065645841246544176568792868221e-324F64
#define __builtin_vsx_xvnmaddmdp __builtin_vsx_xvnmadddp
#define __HAVE_SPECULATION_SAFE_VALUE 1
#define __DEC32_MIN_EXP__ (-94)
#define __builtin_vsx_xxlandc __builtin_vec_andc
#define __INTPTR_WIDTH__ 64
#define __UINT_LEAST32_MAX__ 0xffffffffU
#define __FLT32X_HAS_DENORM__ 1
#define __INT_FAST16_TYPE__ long int
#define __LDBL_HAS_DENORM__ 1
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __INT_LEAST32_MAX__ 0x7fffffff
#define __DEC32_MIN__ 1E-95DF
#define __DBL_MAX_EXP__ 1024
#define __WCHAR_WIDTH__ 32
#define __FLT32_MAX__ 3.40282346638528859811704183484517e+38F32
#define __DEC128_EPSILON__ 1E-33DL
#define __GCC_ATOMIC_LONG_LOCK_FREE 2
#define __PTRDIFF_MAX__ 0x7fffffffffffffffL
#define __STRUCT_PARM_ALIGN__ 16
#define __FLT32_HAS_QUIET_NAN__ 1
#define __LONG_LONG_MAX__ 0x7fffffffffffffffLL
#define __SIZEOF_SIZE_T__ 8
#define __builtin_vsx_xvnmaddmsp __builtin_vsx_xvnmaddsp
#define __PPC__ 1
#define __SIZEOF_WINT_T__ 4
#define __LONG_LONG_WIDTH__ 64
#define __FLT32_MAX_EXP__ 128
#define __ATOMIC_SEQ_CST 5
#define __GXX_ABI_VERSION 1019
#define __FLT_MIN_EXP__ (-125)
#define __GCC_HAVE_DWARF2_CFI_ASM 1
#define __FP_FAST_FMAF 1
#define __DBL_MIN__ ((double)2.22507385850720138309023271733240e-308L)
#define __FP_FAST_FMAF64 1
#define __LONGDOUBLE128 1
#define __LP64__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __pixel __attribute__((altivec(pixel__))) unsigned short
#define __FLT32X_EPSILON__ 2.22044604925031308084726333618164e-16F32x
#define __FLT64_MIN_EXP__ (-1021)
#define __GNUC_WIDE_EXECUTION_CHARSET_NAME "UTF-32BE"
#define __FLT64_MIN_10_EXP__ (-307)
#define __REGISTER_PREFIX__ 
#define __INTMAX_WIDTH__ 64
#define __INTPTR_MAX__ 0x7fffffffffffffffL
#define __BUILTIN_CPU_SUPPORTS__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __builtin_vsx_xxland __builtin_vec_and
#define __FLT32_MIN__ 1.17549435082228750796873653722225e-38F32
#define __UINT8_TYPE__ unsigned char
#define __FLT_DIG__ 6
#define __NO_INLINE__ 1
#define __DEC_EVAL_METHOD__ 2
#define __FLT_MANT_DIG__ 24
#define __LDBL_DECIMAL_DIG__ 33
#define __VERSION__ "14.2.0"
#define __UINT64_C(c) c ## UL
#define _STDC_PREDEF_H 1
#define __BIG_ENDIAN__ 1
#define __GCC_ATOMIC_INT_LOCK_FREE 2
#define __UINTMAX_TYPE__ long unsigned int
#define __FLT32_MANT_DIG__ 24
#define __DEC128_MIN__ 1E-6143DL
#define __FLOAT_WORD_ORDER__ __ORDER_BIG_ENDIAN__
#define __STDC_IEC_60559_COMPLEX__ 201404L
#define __SCHAR_WIDTH__ 8
#define __UINT16_MAX__ 0xffff
#define __INT32_C(c) c
#define __DEC64_EPSILON__ 1E-15DD
#define __ORDER_PDP_ENDIAN__ 3412
#define __DEC128_MIN_EXP__ (-6142)
#define __FLT32X_HAS_INFINITY__ 1
#define __INT_FAST32_TYPE__ long int
#define __SIZEOF_INT128__ 16
#define __UINT_LEAST16_TYPE__ short unsigned int
#define __SET_FPSCR_RN_RETURNS_FPSCR__ 1
#define unix 1
#define __DBL_HAS_DENORM__ 1
#define __SIZE_TYPE__ long unsigned int
#define __UINT64_MAX__ 0xffffffffffffffffUL
#define __FLT_IS_IEC_60559__ 1
#define __INT8_TYPE__ signed char
#define __ELF__ 1
#define __HAVE_BSWAP__ 1
#define __FLT_RADIX__ 2
#define __INT_LEAST16_TYPE__ short int
#define __LDBL_EPSILON__ 4.94065645841246544176568792868221e-324L
#define __UINTMAX_C(c) c ## UL
#define __UINT_FAST64_TYPE__ long unsigned int
#define __SIG_ATOMIC_MAX__ 0x7fffffff
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
#define __USER_LABEL_PREFIX__ 
#define __SIZEOF_PTRDIFF_T__ 8
#define _ARCH_PWR4 1
#define __FLT32_HAS_INFINITY__ 1
#define __DBL_MIN_10_EXP__ (-307)
#define __LDBL_DIG__ 31
#define __FLT64_IS_IEC_60559__ 1
#define __FLT32X_MIN_EXP__ (-1021)
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __INT_FAST16_MAX__ 0x7fffffffffffffffL
#define __vector __attribute__((altivec(vector__)))
#define __FLT64_DIG__ 15
#define __UINT_FAST32_MAX__ 0xffffffffffffffffUL
#define __UINT_LEAST64_TYPE__ long unsigned int
#define __builtin_vsx_xvmsubadp __builtin_vsx_xvmsubdp
#define __builtin_vsx_xxsel __builtin_vec_sel
#define __FLT_HAS_QUIET_NAN__ 1
#define __bool __attribute__((altivec(bool__))) unsigned
#define __FLT_MAX_10_EXP__ 38
#define __FINITE_MATH_ONLY__ 0
#define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
#define __builtin_vsx_xxlxor __builtin_vec_xor
#define __FLT_HAS_INFINITY__ 1
#define __GNUC_EXECUTION_CHARSET_NAME "UTF-8"
#define __CHAR_UNSIGNED__ 1
#define __UINT_FAST16_TYPE__ long unsigned int
#define __DEC64_MAX__ 9.999999999999999E384DD
#define linux 1
#define __INT_FAST32_WIDTH__ 64
#define __CHAR16_TYPE__ short unsigned int
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __SIZE_WIDTH__ 64
#define __WINT_WIDTH__ 32
#define __INT_LEAST16_MAX__ 0x7fff
#define __LONG_DOUBLE_IBM128__ 1
#define __DEC64_MANT_DIG__ 16
#define __INT64_MAX__ 0x7fffffffffffffffL
#define __FLT32_DENORM_MIN__ 1.40129846432481707092372958328992e-45F32
#define __SIG_ATOMIC_WIDTH__ 32
#define __INT_LEAST64_TYPE__ long int
#define __builtin_vsx_xvmsubasp __builtin_vsx_xvmsubsp
#define __INT16_TYPE__ short int
#define __INT_LEAST8_TYPE__ signed char
#define __STDC_VERSION__ 201710L
#define __DEC32_MAX_EXP__ 97
#define _BIG_ENDIAN 1
#define __INT_FAST8_MAX__ 0x7f
#define __SIZEOF_POINTER__ 8
#define __FLT64_HAS_QUIET_NAN__ 1
#define __FLT32_MIN_10_EXP__ (-37)
#define __FLT32X_DIG__ 15
#define __UINT16_C(c) c
#define __PTRDIFF_WIDTH__ 64
#define __builtin_vsx_xvmaddadp __builtin_vsx_xvmadddp
#define __FLT64_HAS_INFINITY__ 1
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
#define __INTPTR_TYPE__ long int
#define __UINT16_TYPE__ short unsigned int
#define __SIZEOF_FLOAT__ 4
#define __pic__ 2
#define __UINTPTR_MAX__ 0xffffffffffffffffUL
#define __FLT32X_DENORM_MIN__ 4.94065645841246544176568792868221e-324F32x
#define __INT_FAST64_WIDTH__ 64
#define __FLT32_DECIMAL_DIG__ 9
#define __INT_FAST64_MAX__ 0x7fffffffffffffffL
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __RSQRTE__ 1
#define __FLT_NORM_MAX__ 3.40282346638528859811704183484517e+38F
#define __INT_MAX__ 0x7fffffff
#define __linux__ 1
#define __LONG_DOUBLE_128__ 1
#define __FLT64_MAX_EXP__ 1024
#define __INT64_TYPE__ long int
#define __FLT_MAX_EXP__ 128
#define __builtin_vsx_xxlor __builtin_vec_or
#define __INT_FAST64_TYPE__ long int
#define __ORDER_BIG_ENDIAN__ 4321
#define __DBL_MANT_DIG__ 53
#define __INT_LEAST64_MAX__ 0x7fffffffffffffffL
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __FP_FAST_FMAF32 1
#define __DEC64_MIN__ 1E-383DD
#define __WINT_TYPE__ unsigned int
#define __UINT_LEAST32_TYPE__ unsigned int
#define __SIZEOF_SHORT__ 2
#define __FLT32_NORM_MAX__ 3.40282346638528859811704183484517e+38F32
#define __FLT64_MAX__ 1.79769313486231570814527423731704e+308F64
#define __STDC_IEC_60559_BFP__ 201404L
#define __INT_LEAST8_MAX__ 0x7f
#define __INT_LEAST64_WIDTH__ 64
#define __FLT32X_MAX_10_EXP__ 308
#define __LDBL_MAX_10_EXP__ 308
#define __ATOMIC_RELAXED 0
#define __DBL_EPSILON__ ((double)2.22044604925031308084726333618164e-16L)
#define __INT_LEAST32_TYPE__ int
#define _LP64 1
#define __UINT8_C(c) c
#define __SIZEOF_WCHAR_T__ 4
#define __builtin_vsx_xvmaddasp __builtin_vsx_xvmaddsp
#define __FLT64_NORM_MAX__ 1.79769313486231570814527423731704e+308F64
#define __INTMAX_MAX__ 0x7fffffffffffffffL
#define __INT_FAST8_TYPE__ signed char
#define _ARCH_PPC 1
#define __GNUC_STDC_INLINE__ 1
#define __FLT64_HAS_DENORM__ 1
#define __FLT32_EPSILON__ 1.19209289550781250000000000000000e-7F32
#define __FP_FAST_FMAF32x 1
#define __DBL_DECIMAL_DIG__ 17
#define __STDC_UTF_32__ 1
#define __INT_FAST8_WIDTH__ 8
#define __FLT32X_MAX__ 1.79769313486231570814527423731704e+308F32x
#define __DBL_NORM_MAX__ ((double)1.79769313486231570814527423731704e+308L)
#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__
#define __VEC_ELEMENT_REG_ORDER__ __ORDER_BIG_ENDIAN__
#define __FLT32_DIG__ 6
#define __UINT64_TYPE__ long unsigned int
#define __UINT32_C(c) c ## U
#define __FLT32X_MIN__ 2.22507385850720138309023271733240e-308F32x
#define __FLT_DENORM_MIN__ 1.40129846432481707092372958328992e-45F
#define _CALL_AIX 1
#define __builtin_vsx_xvnmsubasp __builtin_vsx_xvnmsubsp
#define __INT8_MAX__ 0x7f
#define __LONG_WIDTH__ 64
#define __PIC__ 2
#define __UINT_FAST32_TYPE__ long unsigned int
#define __FLT32X_NORM_MAX__ 1.79769313486231570814527423731704e+308F32x
#define __CHAR32_TYPE__ unsigned int
#define __FLT_MAX__ 3.40282346638528859811704183484517e+38F
#define __builtin_vsx_xvnmsubadp __builtin_vsx_xvnmsubdp
#define __builtin_vsx_xxlnor __builtin_vec_nor
#define __INT32_TYPE__ int
#define __SIZEOF_DOUBLE__ 8
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT64_MIN__ 2.22507385850720138309023271733240e-308F64
#define __INT_LEAST32_WIDTH__ 32
#define __INTMAX_TYPE__ long int
#define __DEC128_MAX_EXP__ 6145
#define __INT16_C(c) c
#define __FLT32X_HAS_QUIET_NAN__ 1
#define __ATOMIC_CONSUME 1
#define __GNUC_MINOR__ 2
#define __INT_FAST16_WIDTH__ 64
#define __UINTMAX_MAX__ 0xffffffffffffffffUL
#define __DEC32_MANT_DIG__ 7
#define __PIE__ 2
#define __DBL_MAX_10_EXP__ 308
#define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221e-324L
#define __ATOMIC_RELEASE 3
#define __STDC__ 1
#define __PTRDIFF_TYPE__ long int
#define __UINT32_TYPE__ unsigned int
#define __FLT32X_MIN_10_EXP__ (-307)
#define __UINTPTR_TYPE__ long unsigned int
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define _ARCH_PPC64 1
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-291)
#define __SIZEOF_LONG_LONG__ 8
#define _Bool _Bool
#define __GCC_ATOMIC_LLONG_LOCK_FREE 2
#define __FLT_DECIMAL_DIG__ 9
#define __UINT_FAST16_MAX__ 0xffffffffffffffffUL
#define __LDBL_NORM_MAX__ 8.98846567431157953864652595394501e+307L
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
#define __UINT_FAST8_TYPE__ unsigned char
#define _CALL_ELF 1
#define __ATOMIC_ACQ_REL 4
glaubitz@perotto:~/node$

Node itself was configured with:

./configure --shared-openssl --with-intl=system-icu --dest-os=linux --shared-libuv --dest-cpu=ppc64 --verbose --shared --shared-zlib --shared-cares --shared-ngtcp2 --shared-nghttp3 --shared-nghttp2 --shared-brotli --shared-simdjson

If you need access to a machine with the same environment, you can access the machine cfarm203 in the GCC Compile Farm.

[targos]

@nodejs/platform-ppc

[miladfarca]

We do not support big-endian linux-ppc64, only Linux on ppc64le and AIX/IBMi on ppc64be are supported. For a full list of supported platforms, please refer to: https://github.com/nodejs/node/blob/main/BUILDING.md#platform-list

[glaubitz]

We do not support big-endian linux-ppc64, only Linux on ppc64le and AIX/IBMi on ppc64be are supported. For a full list of supported platforms, please refer to: https://github.com/nodejs/node/blob/main/BUILDING.md#platform-list

Okay, I'll bisect it myself then. It worked in the past up to including version 20.13 and I suspect there was just some change that ignored some specifics on big-endian ppc64.

I don't see why it shouldn't work on big-endian ppc64 on Linux if it's supported on big-endian ppc64 on AIX.

[glaubitz]

This commit broke NodeJS on big-endian ppc64 on Linux:

commit 7f2c810814d8e3c8e9dd69e5ac004ff1f70a7656
Author: Daryl Haresign <github@daryl.haresign.com>
Date:   Thu Aug 10 20:43:51 2023 -0400

    src,tools: initialize cppgc
    
    This patch:
    
    - Initializes cppgc in InitializeOncePerProcess() when
      kNoInitializeCppgc is not set
    - Create a CppHeap and attach it to the Isolate when
      there isn't one already during IsolateData initialization.
      The CppHeap is detached and terminated when IsolateData
      is freed.
    - Publishes the cppgc headers in the tarball.
    
    This allows C++ addons to start using cppgc to manage objects.
    
    A helper node::SetCppgcReference() is also added to help addons
    enable cppgc tracing in a user-defined object.
    
    Co-authored-by: Joyee Cheung <joyeec9h3@gmail.com>
    Refs: https://github.com/nodejs/node/issues/40786
    PR-URL: https://github.com/nodejs/node/pull/45704
    Refs: https://docs.google.com/document/d/1ny2Qz_EsUnXGKJRGxoA-FXIE2xpLgaMAN6jD7eAkqFQ/edit
    Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
    Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

[glaubitz]

The node binary actually reproducibly segfaults:

(sid_ppc64-dchroot)glaubitz@perotto:~/node$ ./node test/parallel/test-zlib.js
Segmentation fault (core dumped)
(sid_ppc64-dchroot)glaubitz@perotto:~/node$

with the following backtrace:

#0  0x00007fff9b760f88 in heap::base::Stack::IteratePointersImpl(heap::base::Stack const*, heap::base::StackVisitor*, void const*) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
[Current thread is 1 (Thread 0x7fff9bf69960 (LWP 3495316))]
(gdb) bt
#0  0x00007fff9b760f88 in heap::base::Stack::IteratePointersImpl(heap::base::Stack const*, heap::base::StackVisitor*, void const*) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#1  0x00007fff978671d0 in PushAllRegistersAndIterateStack () from /home/glaubitz/node/out/Release/libnode.so.115
#2  0x00007fff97866d94 in .heap::base::Stack::IteratePointers(heap::base::StackVisitor*) const () from /home/glaubitz/node/out/Release/libnode.so.115
#3  0x00007fff97878e68 in .cppgc::internal::MarkerBase::VisitRoots(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#4  0x00007fff97879934 in .cppgc::internal::MarkerBase::EnterAtomicPause(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#5  0x00007fff96e5d860 in .v8::internal::CppHeap::EnterFinalPause(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#6  0x00007fff96f54b54 in .v8::internal::MarkCompactCollector::MarkLiveObjects() () from /home/glaubitz/node/out/Release/libnode.so.115
#7  0x00007fff96f5a880 in .v8::internal::MarkCompactCollector::CollectGarbage() () from /home/glaubitz/node/out/Release/libnode.so.115
#8  0x00007fff96eeec0c in .v8::internal::Heap::MarkCompact() () from /home/glaubitz/node/out/Release/libnode.so.115
#9  0x00007fff96ef4434 in .v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::internal::GarbageCollectionReason, char const*) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#10 0x00007fff96ef4a50 in .v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#11 0x00007fff96ebf2b8 in .v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) () from /home/glaubitz/node/out/Release/libnode.so.115
#12 0x00007fff96e91c04 in .v8::internal::Factory::CodeBuilder::AllocateInstructionStream(bool) () from /home/glaubitz/node/out/Release/libnode.so.115
#13 0x00007fff96e92158 in .v8::internal::Factory::CodeBuilder::BuildInternal(bool) () from /home/glaubitz/node/out/Release/libnode.so.115
#14 0x00007fff96e928c4 in .v8::internal::Factory::CodeBuilder::TryBuild() () from /home/glaubitz/node/out/Release/libnode.so.115
#15 0x00007fff96b387b0 in .v8::internal::baseline::BaselineCompiler::Build(v8::internal::LocalIsolate*) () from /home/glaubitz/node/out/Release/libnode.so.115
#16 0x00007fff96b50838 in .v8::internal::GenerateBaselineCode(v8::internal::Isolate*, v8::internal::Handle<v8::internal::SharedFunctionInfo>) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#17 0x00007fff96bd2224 in .v8::internal::Compiler::CompileSharedWithBaseline(v8::internal::Isolate*, v8::internal::Handle<v8::internal::SharedFunctionInfo>, v8::internal::Compiler::ClearExceptionFlag, v8::internal::IsCompiledScope*) () from /home/glaubitz/node/out/Release/libnode.so.115
#18 0x00007fff96b35420 in .v8::internal::baseline::BaselineBatchCompiler::MaybeCompileFunction(v8::internal::MaybeObject) () from /home/glaubitz/node/out/Release/libnode.so.115
#19 0x00007fff96b355e0 in .v8::internal::baseline::BaselineBatchCompiler::CompileBatch(v8::internal::Handle<v8::internal::JSFunction>) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#20 0x00007fff96b3629c in .v8::internal::baseline::BaselineBatchCompiler::EnqueueFunction(v8::internal::Handle<v8::internal::JSFunction>) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#21 0x00007fff96cfbde8 in .v8::internal::TieringManager::OnInterruptTick(v8::internal::Handle<v8::internal::JSFunction>, v8::internal::CodeKind) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#22 0x00007fff9744f400 in .v8::internal::Runtime_BytecodeBudgetInterrupt_Ignition(int, unsigned long*, v8::internal::Isolate*) () from /home/glaubitz/node/out/Release/libnode.so.115
#23 0x00007fff9656657c in Builtins_CEntry_Return1_ArgvOnStack_NoBuiltinExit () from /home/glaubitz/node/out/Release/libnode.so.115
(gdb) bt
#0  0x00007fff9b760f88 in heap::base::Stack::IteratePointersImpl(heap::base::Stack const*, heap::base::StackVisitor*, void const*) () from /home/glaubitz/node/out/Release/libnode.so.115
#1  0x00007fff978671d0 in PushAllRegistersAndIterateStack () from /home/glaubitz/node/out/Release/libnode.so.115
#2  0x00007fff97866d94 in .heap::base::Stack::IteratePointers(heap::base::StackVisitor*) const () from /home/glaubitz/node/out/Release/libnode.so.115
#3  0x00007fff97878e68 in .cppgc::internal::MarkerBase::VisitRoots(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#4  0x00007fff97879934 in .cppgc::internal::MarkerBase::EnterAtomicPause(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#5  0x00007fff96e5d860 in .v8::internal::CppHeap::EnterFinalPause(cppgc::EmbedderStackState) () from /home/glaubitz/node/out/Release/libnode.so.115
#6  0x00007fff96f54b54 in .v8::internal::MarkCompactCollector::MarkLiveObjects() () from /home/glaubitz/node/out/Release/libnode.so.115
#7  0x00007fff96f5a880 in .v8::internal::MarkCompactCollector::CollectGarbage() () from /home/glaubitz/node/out/Release/libnode.so.115
#8  0x00007fff96eeec0c in .v8::internal::Heap::MarkCompact() () from /home/glaubitz/node/out/Release/libnode.so.115
#9  0x00007fff96ef4434 in .v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::internal::GarbageCollectionReason, char const*) () from /home/glaubitz/node/out/Release/libnode.so.115
#10 0x00007fff96ef4a50 in .v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) () from /home/glaubitz/node/out/Release/libnode.so.115
#11 0x00007fff96ebf2b8 in .v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#12 0x00007fff96e91c04 in .v8::internal::Factory::CodeBuilder::AllocateInstructionStream(bool) () from /home/glaubitz/node/out/Release/libnode.so.115
#13 0x00007fff96e92158 in .v8::internal::Factory::CodeBuilder::BuildInternal(bool) () from /home/glaubitz/node/out/Release/libnode.so.115
#14 0x00007fff96e928c4 in .v8::internal::Factory::CodeBuilder::TryBuild() () from /home/glaubitz/node/out/Release/libnode.so.115
#15 0x00007fff96b387b0 in .v8::internal::baseline::BaselineCompiler::Build(v8::internal::LocalIsolate*) () from /home/glaubitz/node/out/Release/libnode.so.115
#16 0x00007fff96b50838 in .v8::internal::GenerateBaselineCode(v8::internal::Isolate*, v8::internal::Handle<v8::internal::SharedFunctionInfo>) () from /home/glaubitz/node/out/Release/libnode.so.115
#17 0x00007fff96bd2224 in .v8::internal::Compiler::CompileSharedWithBaseline(v8::internal::Isolate*, v8::internal::Handle<v8::internal::SharedFunctionInfo>, v8::internal::Compiler::ClearExceptionFlag, v8::internal::IsCompiledScope*) ()
   from /home/glaubitz/node/out/Release/libnode.so.115
#18 0x00007fff96b35420 in .v8::internal::baseline::BaselineBatchCompiler::MaybeCompileFunction(v8::internal::MaybeObject) () from /home/glaubitz/node/out/Release/libnode.so.115
#19 0x00007fff96b355e0 in .v8::internal::baseline::BaselineBatchCompiler::CompileBatch(v8::internal::Handle<v8::internal::JSFunction>) () from /home/glaubitz/node/out/Release/libnode.so.115
#20 0x00007fff96b3629c in .v8::internal::baseline::BaselineBatchCompiler::EnqueueFunction(v8::internal::Handle<v8::internal::JSFunction>) () from /home/glaubitz/node/out/Release/libnode.so.115
#21 0x00007fff96cfbde8 in .v8::internal::TieringManager::OnInterruptTick(v8::internal::Handle<v8::internal::JSFunction>, v8::internal::CodeKind) () from /home/glaubitz/node/out/Release/libnode.so.115
#22 0x00007fff9744f400 in .v8::internal::Runtime_BytecodeBudgetInterrupt_Ignition(int, unsigned long*, v8::internal::Isolate*) () from /home/glaubitz/node/out/Release/libnode.so.115
#23 0x00007fff9656657c in Builtins_CEntry_Return1_ArgvOnStack_NoBuiltinExit () from /home/glaubitz/node/out/Release/libnode.so.115

[johnsonomotunde]

Took too long here

[miladfarca]

Linux on ppc64be hasn't been supported on V8 for quite some time, and any functionality it had was more a matter of chance. Its support was formally removed in this CL http://crrev.com/c/5796844 . Currently, Linux on ppc64 is only supported in little-endian mode.

[glaubitz]

Linux on ppc64be hasn't been supported on V8 for quite some time, and any functionality it had was more a matter of chance. Its support was formally removed in this CL http://crrev.com/c/5796844 . Currently, Linux on ppc64 is only supported in little-endian mode.

The commit you are referring to talks about 32-bit PowerPC big-endian support, not 64-bit PowerPC big-endian support.

As long as 64-bit PowerPC AIX is supported, there is no reason why it shouldn't work on Linux either.

[glaubitz]

But thanks for your suggestion, this is probably the change I need to revert: https://chromium-review.googlesource.com/c/v8/v8/+/5825032/3/src/base/platform/platform-posix.cc