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[mono][arm64] Handle sysctlbyname failing to find system options. #87189

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merged 1 commit into from
Jun 8, 2023

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rolfbjarne
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@rolfbjarne rolfbjarne commented Jun 6, 2023

This fixes a startup crash on Big Sur:

error: * Assertion at /Users/runner/work/1/s/src/mono/mono/utils/mono-hwcap-arm64.c:35, condition `res == 0' not met

Because sysctl can't find some of these options:

$ sysctl hw.optional.armv8_crc32
hw.optional.armv8_crc32: 1
$ sysctl hw.optional.arm.FEAT_RDM
sysctl: unknown oid 'hw.optional.arm.FEAT_RDM'
$ sysctl hw.optional.arm.FEAT_DotProd
sysctl: unknown oid 'hw.optional.arm.FEAT_DotProd'
$ sysctl hw.optional.arm.FEAT_SHA1
sysctl: unknown oid 'hw.optional.arm.FEAT_SHA1'
$ sysctl hw.optional.arm.FEAT_SHA256
sysctl: unknown oid 'hw.optional.arm.FEAT_SHA256'
$ sysctl hw.optional.arm.FEAT_AES
sysctl: unknown oid 'hw.optional.arm.FEAT_AES'

Full stack trace:

* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 2.1
  * frame #0: 0x0000010ef37560 libmonosgen-2.0.dylib`monoeg_assertion_message
    frame #1: 0x0000010ef375cc libmonosgen-2.0.dylib`mono_assertion_message + 32
    frame #2: 0x0000010ef40d6c libmonosgen-2.0.dylib`mono_hwcap_arch_init + 544
    frame #3: 0x0000010ef54bd8 libmonosgen-2.0.dylib`mono_hwcap_init + 72
    frame #4: 0x0000010ee14dc0 libmonosgen-2.0.dylib`parse_optimizations + 52
    frame #5: 0x0000010edbed48 libmonosgen-2.0.dylib`mono_init
    frame #6: 0x0000010ee18968 libmonosgen-2.0.dylib`mono_jit_init_version
    frame #7: 0x0000010f48a300 libxamarin-dotnet-debug.dylib`xamarin_bridge_initialize + 216
    frame #8: 0x0000010f4900a4 libxamarin-dotnet-debug.dylib`xamarin_main + 376

This fixes a startup crash on Big Sur:

> error: * Assertion at /Users/runner/work/1/s/src/mono/mono/utils/mono-hwcap-arm64.c:35, condition `res == 0' not met

Because sysctl can't find some of these options:

    $ sysctl hw.optional.armv8_crc32
    hw.optional.armv8_crc32: 1
    $ sysctl hw.optional.arm.FEAT_RDM
    sysctl: unknown oid 'hw.optional.arm.FEAT_RDM'
    $ sysctl hw.optional.arm.FEAT_DotProd
    sysctl: unknown oid 'hw.optional.arm.FEAT_DotProd'
    $ sysctl hw.optional.arm.FEAT_SHA1
    sysctl: unknown oid 'hw.optional.arm.FEAT_SHA1'
    $ sysctl hw.optional.arm.FEAT_SHA256
    sysctl: unknown oid 'hw.optional.arm.FEAT_SHA256'
    $ sysctl hw.optional.arm.FEAT_AES
    sysctl: unknown oid 'hw.optional.arm.FEAT_AES'

Full stack trace:

* thread dotnet#1, queue = 'com.apple.main-thread', stop reason = breakpoint 2.1
  * frame #0: 0x0000010ef37560 libmonosgen-2.0.dylib`monoeg_assertion_message
    frame dotnet#1: 0x0000010ef375cc libmonosgen-2.0.dylib`mono_assertion_message + 32
    frame dotnet#2: 0x0000010ef40d6c libmonosgen-2.0.dylib`mono_hwcap_arch_init + 544
    frame dotnet#3: 0x0000010ef54bd8 libmonosgen-2.0.dylib`mono_hwcap_init + 72
    frame dotnet#4: 0x0000010ee14dc0 libmonosgen-2.0.dylib`parse_optimizations + 52
    frame dotnet#5: 0x0000010edbed48 libmonosgen-2.0.dylib`mono_init
    frame dotnet#6: 0x0000010ee18968 libmonosgen-2.0.dylib`mono_jit_init_version
    frame dotnet#7: 0x0000010f48a300 libxamarin-dotnet-debug.dylib`xamarin_bridge_initialize + 216
    frame dotnet#8: 0x0000010f4900a4 libxamarin-dotnet-debug.dylib`xamarin_main + 376
@rolfbjarne
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I'm guessing this started happening in 4de58bf, CC @vargaz

@rolfbjarne
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@vargaz do I need to do anything else to get this merged?

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2 participants