Mercurial > hg > nginx-quic
annotate auto/lib/pcre/makefile.bcc @ 6627:ad736705a744
HTTP/2: avoid left-shifting signed integer into the sign bit.
On non-aligned platforms, properly cast argument before left-shifting it in
ngx_http_v2_parse_uint32 that is used with u_char. Otherwise it propagates
to int to hold the value and can step over the sign bit. Usually, on known
compilers, this results in negation. Furthermore, a subsequent store into a
wider type, that is ngx_uint_t on 64-bit platforms, results in sign-extension.
In practice, this can be observed in debug log as a very large exclusive bit
value, when client sent PRIORITY frame with exclusive bit set:
: *14 http2 PRIORITY frame sid:5 on 1 excl:8589934591 weight:17
Found with UndefinedBehaviorSanitizer.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Thu, 07 Jul 2016 21:03:21 +0300 |
parents | 2fda9065d0f4 |
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rev | line source |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
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593 | 6 CFLAGS = -q -O2 -tWM -w-8004 $(CPU_OPT) |
5343
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Updated PCRE used for win32 builds.
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7 PCREFLAGS = -DHAVE_CONFIG_H -DPCRE_STATIC -DPOSIX_MALLOC_THRESHOLD=10 \ |
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8 -DSUPPORT_PCRE8 -DHAVE_MEMMOVE |
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9 |
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backout r2833: CURDIR was set to Unix style path
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11 pcre.lib: |
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12 cd $(PCRE) |
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13 |
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switch Win32 building to modern PCRE versions (starting from 7.1)
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14 bcc32 -c $(CFLAGS) -I. $(PCREFLAGS) pcre_*.c |
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Win32: Borland C compatibility fixes.
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16 copy /y nul pcre.lst |
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17 for %n in (*.obj) do @echo +%n ^^& >> pcre.lst |
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18 echo + >> pcre.lst |
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20 tlib pcre.lib @pcre.lst |
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22 pcre.h: |
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23 cd $(PCRE) |
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24 |
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Igor Sysoev <igor@sysoev.ru>
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25 copy /y pcre.h.generic pcre.h |
22c4c012c8c9
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Igor Sysoev <igor@sysoev.ru>
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26 copy /y config.h.generic config.h |
22c4c012c8c9
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27 copy /y pcre_chartables.c.dist pcre_chartables.c |