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opt-file.mk revision 1.8 
      1 # $NetBSD: opt-file.mk,v 1.8 2020/12/22 08:05:08 rillig Exp $
      2 #
      3 # Tests for the -f command line option.
      4 
      5 # TODO: Implementation
      6 
      7 all: .PHONY
      8 all: file-ending-in-backslash
      9 all: file-ending-in-backslash-mmap
     10 all: file-containing-null-byte
     11 
     12 # Passing '-' as the filename reads from stdin.  This is unusual but possible.
     13 #
     14 # In the unlikely case where a file ends in a backslash instead of a newline,
     15 # that backslash is trimmed.  See ParseGetLine.
     16 #
     17 # make-2014.01.01.00.00.00 invoked undefined behavior, reading text from
     18 # outside of the file buffer.
     19 #
     20 #	printf '%s' 'VAR=value\' \
     21 #	| MALLOC_OPTIONS=JA make-2014.01.01.00.00.00 -r -f - -V VAR -dA 2>&1 \
     22 #	| less
     23 #
     24 # The debug output shows how make happily uses freshly allocated memory (the
     25 # <A5>) and already freed memory ('Z').
     26 #
     27 #	ParseReadLine (1): 'VAR=value\<A5><A5><A5><A5><A5><A5>'
     28 #	Global:VAR = value\<A5><A5><A5><A5><A5><A5>value\<A5><A5><A5><A5><A5><A5>
     29 #	ParseReadLine (2): 'alue\<A5><A5><A5><A5><A5><A5>'
     30 #	ParseDoDependency(alue\<A5><A5><A5><A5><A5><A5>)
     31 #	make-2014.01.01.00.00.00: "(stdin)" line 2: Need an operator
     32 #	ParseReadLine (3): '<A5><A5><A5>ZZZZZZZZZZZZZZZZ'
     33 #	ParseDoDependency(<A5><A5><A5>ZZZZZZZZZZZZZZZZ)
     34 #
     35 file-ending-in-backslash: .PHONY
     36 	@printf '%s' 'VAR=value\' \
     37 	| ${MAKE} -r -f - -V VAR
     38 
     39 # Between parse.c 1.170 from 2010-12-25 and parse.c 1.511 from 2020-12-22,
     40 # there was an out-of-bounds write in ParseGetLine, where line_end pointed at
     41 # the end of the allocated buffer, in the special case where loadedfile_mmap
     42 # had not added the final newline character.
     43 file-ending-in-backslash-mmap: .PHONY
     44 	@printf '%s' 'VAR=value\' > opt-file-backslash
     45 	@${MAKE} -r -f opt-file-backslash -V VAR
     46 
     47 # If a file contains null bytes, the rest of the line is skipped, and parsing
     48 # continues in the next line.  Throughout the history of make, the behavior
     49 # has changed several times, sometimes knowingly, sometimes by accident.
     50 #
     51 #	echo 'VAR=value' | tr 'l' '\0' > zero-byte.in
     52 #	printf '%s\n' 'all:' ': VAR=${VAR:Q}' >> zero-byte.in
     53 #
     54 #	for year in $(seq 2003 2020); do
     55 #	  echo $year:
     56 #	  make-$year.01.01.00.00.00 -r -f zero-byte.in
     57 #	  echo "exit status $?"
     58 #	  echo
     59 #	done 2>&1 \
     60 #	| sed "s,$PWD/,.,"
     61 #
     62 # This program generated the following output:
     63 #
     64 #	2003 to 2007:
     65 #	exit status 0
     66 #
     67 #	2008 to 2010:
     68 #	make: "zero-byte.in" line 1: Zero byte read from file
     69 #	make: Fatal errors encountered -- cannot continue
     70 #
     71 #	make: stopped in .
     72 #	exit status 1
     73 #
     74 #	2011 to 2013:
     75 #	make: no target to make.
     76 #
     77 #	make: stopped in .
     78 #	exit status 2
     79 #
     80 #	2014 to 2020-12-06:
     81 #	make: "zero-byte.in" line 1: warning: Zero byte read from file, skipping rest of line.
     82 #	exit status 0
     83 #
     84 #	Since 2020-12-07:
     85 #	make: "zero-byte.in" line 1: Zero byte read from file
     86 #	make: Fatal errors encountered -- cannot continue
     87 #	make: stopped in .
     88 #	exit status 1
     89 file-containing-null-byte: .PHONY
     90 	@printf '%s\n' 'VAR=value' 'VAR2=VALUE2' \
     91 	| tr 'l' '\0' \
     92 	| ${MAKE} -r -f - -V VAR -V VAR2
     93 
     94 all:
     95 	: Making ${.TARGET}
     96