JDK-8252051 : Make mlvmJvmtiUtils strncpy uses GCC 10.x friendly
- Type: Enhancement
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 11,16
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2020-08-19
- Updated: 2022-09-09
- Resolved: 2020-08-20
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| JDK 11 | JDK 13 | JDK 15 | JDK 16 |
|---|---|---|---|
| 11.0.14Fixed | 13.0.13Fixed | 15.0.9Fixed | 16 b13Fixed  |
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Description
gcc 10.2 is producing a warning for mlvmJmvtiUtils.cpp:
In file included from test/hotspot/jtreg/vmTestbase/vm/mlvm/indy/func/jvmti/share/libIndyRedefineClass.cpp:31:
test/hotspot/jtreg/vmTestbase/vm/mlvm/share/mlvmJvmtiUtils.cpp:100:12: error: 'char* strncpy(char*, const char*, size_t)' specified bound 256 equals destination size [-Werror=stringop-truncation]
100 | strncpy(mn->classSig, szSignature, sizeof(mn->classSig));
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
It seems like gcc is not smart enough to realize that the strncpy on the previous line (mn->methodName) cannot modify szSignature.
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