2a7d94d89c
Update the Guide's performance section with current information for Racket CS, and also document the Racket CS compilation mode and inspection environment variables. Make a couple of environment variables work more consistently: PLTDISABLEGC for CS and PLT_ZO_PATH for BC.
99 lines
3.6 KiB
Racket
99 lines
3.6 KiB
Racket
#lang racket/base
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(require racket/cmdline
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raco/command-name
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compiler/zo-parse
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compiler/decompile
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compiler/compilation-path
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racket/pretty
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racket/format
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"../private/chez.rkt")
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(define (get-name)
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(string->symbol (short-program+command-name)))
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(define force? #f)
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(define to-linklets? #f)
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(define source-files
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(command-line
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#:program (short-program+command-name)
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#:once-each
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[("--force") "Ignore timestamp mimatch on associated \".zo\""
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(set! force? #t)]
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[("--columns" "-n") n "Format for <n> columns"
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(let ([num (string->number n)])
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(unless (exact-positive-integer? num)
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(raise-user-error (get-name)
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"not a valid column count: ~a" n))
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(pretty-print-columns num))]
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[("--linklet") "Decompile to linklets"
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(set! to-linklets? #t)]
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[("--no-disassemble") "Show machine code as-is"
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(current-can-disassemble #f)]
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#:args source-or-bytecode-file
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source-or-bytecode-file))
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(define (check-files orig-file alt-file)
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(cond
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[(not (file-exists? alt-file))
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(cond
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[(file-exists? orig-file)
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(unless (is-bytecode-file? orig-file)
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(raise-user-error (get-name)
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(~a "not a bytecode file, and no associated \".zo\" file;\n"
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" consider using `raco make` to compile the source file to bytecode\n"
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" path: ~a\n"
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" tried associated path: ~a")
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orig-file
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alt-file))]
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[else
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(raise-user-error (get-name)
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(~a "no such file, and no associated \".zo\" file\n"
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" path: ~a\n"
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" tried associated path: ~a")
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orig-file
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alt-file)])]
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[(not (is-bytecode-file? alt-file))
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(raise-user-error (get-name)
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(~a "associated \".zo\" file is not a bytecode file\n"
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" original path: ~a\n"
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" associated path: ~a")
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orig-file
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alt-file)]
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[(and (not force?)
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((file-or-directory-modify-seconds orig-file
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#f
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(lambda () -inf.0))
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. > .
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(file-or-directory-modify-seconds alt-file)))
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;; return a warning:
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(raise-user-error (get-name)
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(~a "associated \".zo\" file's date is older than given file's date;\n"
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" consider using `raco make` to rebuild the source file, or use `--force`\n"
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" to skip the date check\n"
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" original path: ~a\n"
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" associated path: ~a")
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orig-file
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alt-file)]))
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(define (is-bytecode-file? orig-file)
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(call-with-input-file*
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orig-file
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(lambda (i)
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(equal? #"#~" (read-bytes 2 i)))))
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(for ([zo-file source-files])
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(let ([zo-file (path->complete-path zo-file)])
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(let-values ([(base name dir?) (split-path zo-file)])
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(let ([alt-file (get-compilation-bytecode-file zo-file)])
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(check-files zo-file alt-file)
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(parameterize ([current-load-relative-directory base]
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[print-graph #t])
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(pretty-write
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(decompile
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#:to-linklets? to-linklets?
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(call-with-input-file*
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(if (file-exists? alt-file) alt-file zo-file)
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(lambda (in)
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(zo-parse in))))))))))
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