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GH-50471: [C++][Python] Bump bundled mimalloc to 3.4.1 #50555

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raulcd wants to merge 6 commits into from
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GH-50471: [C++][Python] Bump bundled mimalloc to 3.4.1 #50555

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a2e4413
GH-50471: [C++][Python] Bump bundled mimalloc to 3.4.1
raulcd Jul 20, 2026
c8e197f
Validate whether the mimalloc 3.3.1 workaround is necessary
raulcd Jul 20, 2026
317632a
Revert "Validate whether the mimalloc 3.3.1 workaround is necessary"
raulcd Jul 20, 2026
8428327
Update comment for workaround still required as of mimalloc v3.4.1
raulcd Jul 20, 2026
5d4c429
GH-50428: [C++] Better mimalloc configuration on macOS
pitrou Jul 20, 2026
43731fb
Fix CMake option name
pitrou Jul 20, 2026
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9 changes: 8 additions & 1 deletion cpp/cmake_modules/ThirdpartyToolchain.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -2558,7 +2558,7 @@ if(ARROW_MIMALLOC)
set(MIMALLOC_C_FLAGS ${EP_C_FLAGS})
if(MINGW)
# Workaround https://github.com/microsoft/mimalloc/issues/910 on RTools40
# This is still required as of mimalloc 3.3.1, tested as part of GH-49772
# This is still required as of mimalloc 3.4.1, tested as part of GH-50471
set(MIMALLOC_C_FLAGS "${MIMALLOC_C_FLAGS} -DERROR_COMMITMENT_MINIMUM=635")
endif()

Expand All @@ -2567,8 +2567,15 @@ if(ARROW_MIMALLOC)
"-DCMAKE_C_FLAGS=${MIMALLOC_C_FLAGS}"
"-DCMAKE_INSTALL_PREFIX=${MIMALLOC_PREFIX}"
-DMI_INSTALL_TOPLEVEL=ON
# Don't override default malloc
-DMI_OVERRIDE=OFF
-DMI_OSX_INTERPOSE=OFF
-DMI_OSX_ZONE=OFF
Comment on lines 2569 to +2573
# Allow usage through dlopen (i.e. when libarrow.so itself is dlopen'ed)
-DMI_LOCAL_DYNAMIC_TLS=ON
# GH-50428: Make sure several mimalloc instances can cohabit in the same process
# (also https://github.com/microsoft/mimalloc/issues/1327#issuecomment-4964140817)
-DMI_TLS_MODEL_LOCAL=ON
-DMI_BUILD_OBJECT=OFF
-DMI_BUILD_SHARED=OFF
-DMI_BUILD_TESTS=OFF
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4 changes: 2 additions & 2 deletions cpp/thirdparty/versions.txt
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Expand Up @@ -80,8 +80,8 @@ ARROW_JEMALLOC_BUILD_VERSION=5.3.0
ARROW_JEMALLOC_BUILD_SHA256_CHECKSUM=2db82d1e7119df3e71b7640219b6dfe84789bc0537983c3b7ac4f7189aecfeaa
ARROW_LZ4_BUILD_VERSION=v1.10.0
ARROW_LZ4_BUILD_SHA256_CHECKSUM=537512904744b35e232912055ccf8ec66d768639ff3abe5788d90d792ec5f48b
ARROW_MIMALLOC_BUILD_VERSION=v3.3.1
ARROW_MIMALLOC_BUILD_SHA256_CHECKSUM=42c16914168ac6741eeb407e83b93a12b2b7ee25a7e14e6b4807fab8b577a540
ARROW_MIMALLOC_BUILD_VERSION=v3.4.1
ARROW_MIMALLOC_BUILD_SHA256_CHECKSUM=37107a52c16baa80c5f74861dddda7b27bb9949e41a6637691867a94c88ca446
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ARROW_NLOHMANN_JSON_BUILD_VERSION=v3.12.0
ARROW_NLOHMANN_JSON_BUILD_SHA256_CHECKSUM=4b92eb0c06d10683f7447ce9406cb97cd4b453be18d7279320f7b2f025c10187
ARROW_OPENTELEMETRY_BUILD_VERSION=v1.21.0
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