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Don't move parenthesized lines to the left, even if that means they
flow past the right margin.
By default, BSD indent lines up statement continuation lines that are
within parentheses so that they start just to the right of the preceding
left parenthesis. However, traditionally, if that resulted in the
continuation line extending to the right of the desired right margin,
then indent would push it left just far enough to not overrun the margin,
if it could do so without making the continuation line start to the left of
the current statement indent. That makes for a weird mix of indentations
unless one has been completely rigid about never violating the 80-column
limit.
This behavior has been pretty universally panned by Postgres developers.
Hence, disable it with indent's new -lpl switch, so that parenthesized
lines are always lined up with the preceding left paren.
This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.
Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
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On machines with MAXALIGN = 8, the payload of a bytea is not maxaligned,
since it will start 4 bytes into a palloc'd value. On alignment-picky
hardware, this will cause failures in accesses to 8-byte-wide values
within the page. We already encountered this problem when we introduced
GIN index inspection functions, and fixed it in commit 84ad68d64. Make
use of the same function for hash indexes.
A small difficulty is that up to now contrib/pageinspect has not shared
any functions at all across files. To support that, introduce a common
header file "pageinspect.h" for the module.
Also, move get_page_from_raw() out of ginfuncs.c, where it didn't
especially belong, and put it in rawpage.c which seems a more natural home.
Per buildfarm.
Discussion: https://postgr.es/m/17311.1486134714@sss.pgh.pa.us
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On closer inspection, commit 84ad68d64 broke gin_leafpage_items(),
because the aligned copy of the page got palloc'd in a short-lived
context whereas it needs to be in the SRF's multi_call_memory_ctx.
This was not exposed by the regression test, because the regression
test doesn't actually exercise the function in a meaningful way.
Fix the code bug, and extend the test in what I hope is a portable
fashion.
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The raw page data that is passed into the functions will not be aligned
at 8-byte boundaries. Casting that to a struct and accessing int64
fields will result in unaligned access. On most platforms, you get away
with it, but it will result on a crash on pickier platforms such as ia64
and sparc64.
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Somebody apparently thought that "if Int32GetDatum is good,
Int64GetDatum must be better". Per buildfarm failures now
that Peter has added some regression tests here.
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Backpatch certain files through 9.1
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Backpatch certain files through 9.0
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Patch by me, Peter Geoghegan and Michael Paquier, reviewed by Amit Kapila.
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