HDF5: Fix Segfault with libSplash Files#962
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ax3l merged 3 commits intoopenPMD:devfrom Apr 9, 2021
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Fix a segfault (on some systems) with legacy libSplash HDF5 files. From the docs: ``` Name: H5Tget_member_name ... The HDF5 Library allocates a buffer to receive the name of the field. The caller must subsequently free the buffer with H5free_memory. ``` Refs.: - https://support.hdfgroup.org/HDF5/doc/RM/RM_H5T.html#Datatype-GetMemberName - https://support.hdfgroup.org/HDF5/doc/RM/RM_H5.html#Library-FreeMemory
ax3l
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Apr 8, 2021
Passing potential `nullptr`s is undefined behavior.
ax3l
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Apr 8, 2021
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* HDF5: Fix Segfault with libSplash Files Fix a segfault (on some systems) with legacy libSplash HDF5 files. From the docs: ``` Name: H5Tget_member_name ... The HDF5 Library allocates a buffer to receive the name of the field. The caller must subsequently free the buffer with H5free_memory. ``` Refs.: - https://support.hdfgroup.org/HDF5/doc/RM/RM_H5T.html#Datatype-GetMemberName - https://support.hdfgroup.org/HDF5/doc/RM/RM_H5.html#Library-FreeMemory * avoid undefined behavior in str(n)cmp Passing potential `nullptr`s is undefined behavior. * Clang-Tidy: Intentional Branch Clone
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Fix #939: a segfault (triggered reproducibly with pip builds) with legacy libSplash HDF5 files.
Introduced in #641 (
0.10.3-alphaand newer).From the docs:
I did not need this in my test to fix the segfault, but revisiting the logic I also noticed that passing
nullptrs tostr(n)cmpis undefined behavior and fixed that as well.Refs.:
IN: Buffer to be freed. Can be NULL.)