strange behavior of SIGFPE and SIGSEGV handlers #27
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ghost
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Can't reproduce the crash on Mac. Haven't seen any of this weird SIGFPE stuff for a while. |
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I think I'll close this, because nothing further is going to happen. It usually works and I'm out of ideas. Can reopen if the problem resurfaces. |
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This was referenced Mar 18, 2012
Closed
ararslan
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Compile on Solaris 11 (Solaris 11 zone on SmartOS)
ararslan
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Feb 3, 2017
Compile on Solaris 11 (Solaris 11 zone on SmartOS)
ararslan
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Feb 3, 2017
Compile on Solaris 11 (Solaris 11 zone on SmartOS)
StefanKarpinski
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Feb 8, 2018
enable precompilation for Pkg3
cmcaine
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Sep 24, 2020
RFC: Add track documentation
LilithHafner
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Oct 11, 2021
Added auto- and cross- -correlation and -covariance functions
topolarity
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Jun 27, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto JuliaLang#27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves JuliaLang#50276.
topolarity
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to topolarity/julia
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this issue
Jun 27, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto JuliaLang#27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves JuliaLang#50276.
topolarity
added a commit
to topolarity/julia
that referenced
this issue
Jun 28, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto JuliaLang#27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves JuliaLang#50276.
topolarity
added a commit
to topolarity/julia
that referenced
this issue
Jun 28, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto JuliaLang#27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves JuliaLang#50276.
topolarity
added a commit
to topolarity/julia
that referenced
this issue
Jun 28, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto JuliaLang#27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves JuliaLang#50276.
vtjnash
pushed a commit
that referenced
this issue
Jun 29, 2023
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
23 ─ %60 = Core.ifelse(%47, false, true)::Bool
│ %61 = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
25 ─ goto #27 if not %60
26 ─ %65 = π (%61, Bool)
└─── ...
```
In basic block #26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.
Resolves #50276
IanButterworth
added a commit
that referenced
this issue
Aug 9, 2024
Testing: - with a package error ``` (SimpleLooper) pkg> precompile Precompiling all packages... ✗ SimpleLooper 0 dependencies successfully precompiled in 2 seconds ERROR: The following 1 direct dependency failed to precompile: SimpleLooper Failed to precompile SimpleLooper [ff33fe5-d8e3-4cbd-8bd9-3d2408ff8cab] to "/Users/ian/.julia/compiled/v1.12/SimpleLooper/jl_PQArnH". ERROR: LoadError: Stacktrace: [1] error() @ Base ./error.jl:53 ``` - with interrupt ``` (SimpleLooper) pkg> precompile Precompiling all packages... ^C Interrupted: Exiting precompilation... ◒ SimpleLooper 1 dependency had output during precompilation: ┌ SimpleLooper │ [57879] signal 2: Interrupt: 2 │ in expression starting at /Users/ian/Documents/GitHub/SimpleLooper.jl/src/SimpleLooper.jl:2 └ ``` - an internal error simulated in the same scope that JuliaLang/Pkg.jl#3984 was failing to throw from ``` JULIA stdlib/release.image Unhandled Task ERROR: Stacktrace: [1] error() @ Base ./error.jl:53 [2] (::Base.Precompilation.var"#27#65"{Bool, Bool, Vector{Task}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Base.Event, Base.Event, ReentrantLock, Vector{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Vector{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}}, Int64, Vector{Base.PkgId}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Bool}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Base.Event}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Bool}, Vector{Base.PkgId}, Dict{Base.PkgId, String}, Dict{Tuple{Base.PkgId, UInt128, String, String}, Bool}, Base.Precompilation.var"#color_string#38"{Bool}, Bool, Base.Semaphore, Bool, String, Vector{String}, Vector{Base.PkgId}, Base.PkgId, Base.CacheFlags, Cmd, Pair{Cmd, Base.CacheFlags}, Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}})() @ Base.Precompilation ./precompilation.jl:819 ```
lazarusA
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to lazarusA/julia
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Aug 17, 2024
Testing: - with a package error ``` (SimpleLooper) pkg> precompile Precompiling all packages... ✗ SimpleLooper 0 dependencies successfully precompiled in 2 seconds ERROR: The following 1 direct dependency failed to precompile: SimpleLooper Failed to precompile SimpleLooper [ff33fe5-d8e3-4cbd-8bd9-3d2408ff8cab] to "/Users/ian/.julia/compiled/v1.12/SimpleLooper/jl_PQArnH". ERROR: LoadError: Stacktrace: [1] error() @ Base ./error.jl:53 ``` - with interrupt ``` (SimpleLooper) pkg> precompile Precompiling all packages... ^C Interrupted: Exiting precompilation... ◒ SimpleLooper 1 dependency had output during precompilation: ┌ SimpleLooper │ [57879] signal 2: Interrupt: 2 │ in expression starting at /Users/ian/Documents/GitHub/SimpleLooper.jl/src/SimpleLooper.jl:2 └ ``` - an internal error simulated in the same scope that JuliaLang/Pkg.jl#3984 was failing to throw from ``` JULIA stdlib/release.image Unhandled Task ERROR: Stacktrace: [1] error() @ Base ./error.jl:53 [2] (::Base.Precompilation.var"JuliaLang#27#65"{Bool, Bool, Vector{Task}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Base.Event, Base.Event, ReentrantLock, Vector{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, String}, Vector{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}}, Int64, Vector{Base.PkgId}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Bool}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Base.Event}, Dict{Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}, Bool}, Vector{Base.PkgId}, Dict{Base.PkgId, String}, Dict{Tuple{Base.PkgId, UInt128, String, String}, Bool}, Base.Precompilation.var"#color_string#38"{Bool}, Bool, Base.Semaphore, Bool, String, Vector{String}, Vector{Base.PkgId}, Base.PkgId, Base.CacheFlags, Cmd, Pair{Cmd, Base.CacheFlags}, Tuple{Base.PkgId, Pair{Cmd, Base.CacheFlags}}})() @ Base.Precompilation ./precompilation.jl:819 ```
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In some builds, the SEGV handler does not work until SIGFPE has been raised. We used to address this with the infamous "awful_sigfpe_hack", then at some later point testing showed it was no longer necessary. However, for me the problem is back:
julia> f(x)=f(x)
Methods for generic function f
f(Any,)
julia> f(2)
Segmentation fault (core dumped)
VS.
julia> div(1,0)
error: integer divide by zero
julia> f(x)=f(x)
Methods for generic function f
f(Any,)
julia> f(2)
error: stack overflow
By frobbing it a bit I found that setting up the signal handlers after loading the system image (in init.c) "fixes" the problem again. I don't understand this at all. It might have made sense that something was different after entering a signal handler (e.g. the signal mask, but I tried frobbing that too), but I don't know what is different this time. This is a mystery.
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