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| author | Vasil Dimov <vd@FreeBSD.org> | 2020-05-01 14:05:48 +0200 |
|---|---|---|
| committer | Vasil Dimov <vd@FreeBSD.org> | 2020-05-03 17:21:45 +0200 |
| commit | 71f183a49b714a28622277fa668d8f9f3dac0aae (patch) | |
| tree | 34c61e4835aff14a38eec1982777a6a6ec47a890 /src/support | |
| parent | ddc0a600b38ac6cef044085cdee46649fc437562 (diff) | |
build: warn on potentially uninitialized reads
Enable -Wconditional-uninitialized to warn on potentially uninitialized
reads.
Fix the sole such warning in Bitcoin Core in GetRdRand(): r1 would be
set to 0 on rdrand failure, so initializing it to 0 is a non-functional
change.
From "Intel 64 and IA-32 ArchitecturesSoftware Developer's Manual" [1],
page 1711: "CF=1 indicates that the data in the destination is valid.
Otherwise CF=0 and the data in the destination operand will be returned
as zeros for the specified width."
[1] https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf
Diffstat (limited to 'src/support')
0 files changed, 0 insertions, 0 deletions