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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/15ab6cd548f284732a7f89d78c2b89b1bfc4ea1d">15ab6cd5</a></strong>
<div>
<span>by Ömer Sinan Ağacan</span>
<i>at 2020-04-18T13:21:44-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve prepForeignCall error reporting
Show parameters and description of the error code when ffi_prep_cif
fails.
This may be helpful for debugging #17018.
</pre>
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<h4>1 changed file:</h4>
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<li class="file-stats">
<a href="#d65e77162e49f298b80988f13981e34adac25723">
libraries/ghci/GHCi/FFI.hsc
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<h4>Changes:</h4>
<li id="d65e77162e49f298b80988f13981e34adac25723">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/15ab6cd548f284732a7f89d78c2b89b1bfc4ea1d#d65e77162e49f298b80988f13981e34adac25723"><strong>libraries/ghci/GHCi/FFI.hsc</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -58,15 +58,29 @@ prepForeignCall cconv arg_types result_type = do</td>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="plaintext"> cif <- mallocBytes (#const sizeof(ffi_cif))</span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="plaintext"> let abi = convToABI cconv</span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="plaintext"> r <- ffi_prep_cif cif abi (fromIntegral n_args) (ffiType result_type) arg_arr</span>
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<pre style="margin: 0;">-<span id="LC61" class="line" lang="plaintext"> if (r /= fFI_OK)</span>
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<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext"> then throwIO (ErrorCall ("prepForeignCallFailed: " ++ show r))</span>
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<pre style="margin: 0;">-<span id="LC63" class="line" lang="plaintext"> else return (castPtr cif)</span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="plaintext"> if r /= fFI_OK then</span>
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<pre style="margin: 0;">+<span id="LC62" class="line" lang="plaintext"> throwIO $ ErrorCall $ concat</span>
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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext"> [ "prepForeignCallFailed: ", strError r,</span>
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<pre style="margin: 0;">+<span id="LC64" class="line" lang="plaintext"> "(cconv: ", show cconv,</span>
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<pre style="margin: 0;">+<span id="LC65" class="line" lang="plaintext"> " arg tys: ", show arg_types,</span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="plaintext"> " res ty: ", show result_type, ")" ]</span>
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<pre style="margin: 0;">+<span id="LC67" class="line" lang="plaintext"> else</span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="plaintext"> return (castPtr cif)</span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="plaintext">freeForeignCallInfo :: Ptr C_ffi_cif -> IO ()</span>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="plaintext">freeForeignCallInfo p = do</span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="plaintext"> free ((#ptr ffi_cif, arg_types) p)</span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="plaintext"> free p</span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="plaintext">strError :: C_ffi_status -> String</span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="plaintext">strError r</span>
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<pre style="margin: 0;">+<span id="LC77" class="line" lang="plaintext"> | r == fFI_BAD_ABI</span>
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78
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<pre style="margin: 0;">+<span id="LC78" class="line" lang="plaintext"> = "invalid ABI (FFI_BAD_ABI)"</span>
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79
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<pre style="margin: 0;">+<span id="LC79" class="line" lang="plaintext"> | r == fFI_BAD_TYPEDEF</span>
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80
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<pre style="margin: 0;">+<span id="LC80" class="line" lang="plaintext"> = "invalid type description (FFI_BAD_TYPEDEF)"</span>
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81
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<pre style="margin: 0;">+<span id="LC81" class="line" lang="plaintext"> | otherwise</span>
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82
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<pre style="margin: 0;">+<span id="LC82" class="line" lang="plaintext"> = "unknown error: " ++ show r</span>
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83
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<pre style="margin: 0;">+<span id="LC83" class="line" lang="plaintext"></span>
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70
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84
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<pre style="margin: 0;"> <span id="LC84" class="line" lang="plaintext">convToABI :: FFIConv -> C_ffi_abi</span>
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71
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85
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<pre style="margin: 0;"> <span id="LC85" class="line" lang="plaintext">convToABI FFICCall = fFI_DEFAULT_ABI</span>
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72
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86
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<pre style="margin: 0;"> <span id="LC86" class="line" lang="plaintext">#if defined(mingw32_HOST_OS) && defined(i386_HOST_ARCH)</span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -108,12 +122,10 @@ foreign import ccall "&ffi_type_float" ffi_type_float :: Ptr C_ffi_type</td>
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108
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122
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<pre style="margin: 0;"> <span id="LC122" class="line" lang="plaintext">foreign import ccall "&ffi_type_double" ffi_type_double :: Ptr C_ffi_type</span>
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="plaintext">foreign import ccall "&ffi_type_pointer"ffi_type_pointer :: Ptr C_ffi_type</span>
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<pre style="margin: 0;"> <span id="LC124" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">-<span id="LC111" class="line" lang="plaintext">fFI_OK :: C_ffi_status</span>
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112
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<pre style="margin: 0;">-<span id="LC112" class="line" lang="plaintext">fFI_OK = (#const FFI_OK)</span>
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<pre style="margin: 0;">-<span id="LC113" class="line" lang="plaintext">--fFI_BAD_ABI :: C_ffi_status</span>
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114
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<pre style="margin: 0;">-<span id="LC114" class="line" lang="plaintext">--fFI_BAD_ABI = (#const FFI_BAD_ABI)</span>
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115
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<pre style="margin: 0;">-<span id="LC115" class="line" lang="plaintext">--fFI_BAD_TYPEDEF :: C_ffi_status</span>
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116
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<pre style="margin: 0;">-<span id="LC116" class="line" lang="plaintext">--fFI_BAD_TYPEDEF = (#const FFI_BAD_TYPEDEF)</span>
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<pre style="margin: 0;">+<span id="LC125" class="line" lang="plaintext">fFI_OK, fFI_BAD_ABI, fFI_BAD_TYPEDEF :: C_ffi_status</span>
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<pre style="margin: 0;">+<span id="LC126" class="line" lang="plaintext">fFI_OK = (#const FFI_OK)</span>
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<pre style="margin: 0;">+<span id="LC127" class="line" lang="plaintext">fFI_BAD_ABI = (#const FFI_BAD_ABI)</span>
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<pre style="margin: 0;">+<span id="LC128" class="line" lang="plaintext">fFI_BAD_TYPEDEF = (#const FFI_BAD_TYPEDEF)</span>
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117
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129
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<pre style="margin: 0;"> <span id="LC129" class="line" lang="plaintext"></span>
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118
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="plaintext">fFI_DEFAULT_ABI :: C_ffi_abi</span>
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119
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<pre style="margin: 0;"> <span id="LC131" class="line" lang="plaintext">fFI_DEFAULT_ABI = (#const FFI_DEFAULT_ABI)</span>
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