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      1 # $NetBSD: opt-file.mk,v 1.16 2024/04/01 12:26:02 rillig Exp $
      2 #
      3 # Tests for the -f command line option, which adds a makefile to the list of
      4 # files that are parsed.
      5 
      6 # TODO: Implementation
      7 
      8 all: .PHONY
      9 all: file-ending-in-backslash
     10 all: file-ending-in-backslash-mmap
     11 all: line-with-trailing-whitespace
     12 all: file-containing-null-byte
     13 
     14 # When the filename is '-', the input comes from stdin.  This is unusual but
     15 # possible.
     16 #
     17 # In the unlikely case where a file ends in a backslash instead of a newline,
     18 # that backslash is trimmed.  See ReadLowLevelLine.
     19 #
     20 # make-2014.01.01.00.00.00 invoked undefined behavior, reading text from
     21 # outside of the file buffer.
     22 #
     23 #	printf '%s' 'VAR=value\' \
     24 #	| MALLOC_OPTIONS="JA" \
     25 #	  MALLOC_CONF="junk:true" \
     26 #	  make-2014.01.01.00.00.00 -r -f - -V VAR -dA 2>&1 \
     27 #	| less
     28 #
     29 # The debug output shows how make happily uses freshly allocated memory (the
     30 # <A5>) and already freed memory ('Z').
     31 #
     32 #	ParseReadLine (1): 'VAR=value\<A5><A5><A5><A5><A5><A5>'
     33 #	Global:VAR = value\<A5><A5><A5><A5><A5><A5>value\<A5><A5><A5><A5><A5><A5>
     34 #	ParseReadLine (2): 'alue\<A5><A5><A5><A5><A5><A5>'
     35 #	ParseDependency(alue\<A5><A5><A5><A5><A5><A5>)
     36 #	make-2014.01.01.00.00.00: "(stdin)" line 2: Need an operator
     37 #	ParseReadLine (3): '<A5><A5><A5>ZZZZZZZZZZZZZZZZ'
     38 #	ParseDependency(<A5><A5><A5>ZZZZZZZZZZZZZZZZ)
     39 #
     40 file-ending-in-backslash: .PHONY
     41 	@printf '%s' 'VAR=value\' \
     42 	| ${MAKE} -r -f - -V VAR
     43 
     44 # Between parse.c 1.170 from 2010-12-25 and parse.c 1.511 from 2020-12-22,
     45 # there was an out-of-bounds write in ParseGetLine, where line_end pointed at
     46 # the end of the allocated buffer, in the special case where loadedfile_mmap
     47 # had not added the final newline character.
     48 file-ending-in-backslash-mmap: .PHONY
     49 	@printf '%s' 'VAR=value\' > opt-file-backslash
     50 	@${MAKE} -r -f opt-file-backslash -V VAR
     51 	@rm opt-file-backslash
     52 
     53 # Since parse.c 1.511 from 2020-12-22, an assertion in ParseGetLine failed
     54 # for lines that contained trailing whitespace.  Worked around in parse.c
     55 # 1.513, properly fixed in parse.c 1.514 from 2020-12-22.
     56 line-with-trailing-whitespace: .PHONY
     57 	@printf '%s' 'VAR=$@ ' > opt-file-trailing-whitespace
     58 	@${MAKE} -r -f opt-file-trailing-whitespace -V VAR
     59 	@rm opt-file-trailing-whitespace
     60 
     61 # If a makefile contains null bytes, it is an error.  Throughout the history
     62 # of make, the behavior has changed several times, sometimes intentionally,
     63 # sometimes by accident.
     64 #
     65 #	echo 'VAR=value' | tr 'l' '\0' > zero-byte.in
     66 #	printf '%s\n' 'all:' ': VAR=${VAR:Q}' >> zero-byte.in
     67 #
     68 #	for year in $(seq 2003 2020); do
     69 #	  echo $year:
     70 #	  make-$year.01.01.00.00.00 -r -f zero-byte.in
     71 #	  echo "exit status $?"
     72 #	  echo
     73 #	done 2>&1 \
     74 #	| sed "s,$PWD/,.,"
     75 #
     76 # This program generated the following output:
     77 #
     78 #	2003 to 2007:
     79 #	exit status 0
     80 #
     81 #	2008 to 2010:
     82 #	make: "(stdin)" line 1: Zero byte read from file
     83 #	make: Fatal errors encountered -- cannot continue
     84 #
     85 #	make: stopped in .
     86 #	exit status 1
     87 #
     88 #	2011 to 2013:
     89 #	make: no target to make.
     90 #
     91 #	make: stopped in .
     92 #	exit status 2
     93 #
     94 #	2014 to 2020-12-06:
     95 #	make: "(stdin)" line 1: warning: Zero byte read from file, skipping rest of line.
     96 #	exit status 0
     97 #
     98 #	Since 2020-12-07:
     99 #	make: "(stdin)" line 1: Zero byte read from file
    100 #	make: Fatal errors encountered -- cannot continue
    101 #	make: stopped in .
    102 #	exit status 1
    103 #
    104 #	Since 2024-04-01:
    105 #	make: "(stdin)" line 1: Zero byte read from file
    106 #	*** Error code 2 (continuing)
    107 file-containing-null-byte: .PHONY
    108 	@printf '%s\n' 'VAR=value' 'VAR2=VALUE2' \
    109 	| tr 'l' '\0' \
    110 	| ${MAKE} -r -f - -V VAR -V VAR2
    111 
    112 all:
    113 	: Making ${.TARGET}
    114