mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-29 12:36:35 +03:00
Brian Anderson
618 lines
20 KiB
Rust
618 lines
20 KiB
Rust
import io::writer_util;
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import syntax::{ast, ast_util, fold, visit, codemap};
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import syntax::parse;
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import syntax::print::pprust;
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import syntax::diagnostic;
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enum test_mode { tm_converge, tm_run, }
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type context = { mode: test_mode }; // + rng
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fn write_file(filename: ~str, content: ~str) {
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result::get(
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io::file_writer(filename, ~[io::create, io::truncate]))
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.write_str(content);
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}
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fn contains(haystack: ~str, needle: ~str) -> bool {
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str::contains(haystack, needle)
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}
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fn find_rust_files(&files: ~[~str], path: ~str) {
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if str::ends_with(path, ~".rs") && !contains(path, ~"utf8") {
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// ignoring "utf8" tests because something is broken
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files += ~[path];
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} else if os::path_is_dir(path)
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&& !contains(path, ~"compile-fail")
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&& !contains(path, ~"build") {
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for os::list_dir_path(path).each |p| {
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find_rust_files(files, p);
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}
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}
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}
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fn common_exprs() -> ~[ast::expr] {
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fn dse(e: ast::expr_) -> ast::expr {
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{ id: 0, callee_id: -1, node: e, span: ast_util::dummy_sp() }
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}
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fn dsl(l: ast::lit_) -> ast::lit {
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{ node: l, span: ast_util::dummy_sp() }
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}
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~[dse(ast::expr_break),
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dse(ast::expr_again),
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dse(ast::expr_fail(option::none)),
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dse(ast::expr_fail(option::some(
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@dse(ast::expr_lit(@dsl(ast::lit_str(@~"boo"))))))),
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dse(ast::expr_ret(option::none)),
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dse(ast::expr_lit(@dsl(ast::lit_nil))),
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dse(ast::expr_lit(@dsl(ast::lit_bool(false)))),
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dse(ast::expr_lit(@dsl(ast::lit_bool(true)))),
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dse(ast::expr_unary(ast::box(ast::m_imm),
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@dse(ast::expr_lit(@dsl(ast::lit_bool(true)))))),
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dse(ast::expr_unary(ast::uniq(ast::m_imm),
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@dse(ast::expr_lit(@dsl(ast::lit_bool(true))))))
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]
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}
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pure fn safe_to_steal_expr(e: @ast::expr, tm: test_mode) -> bool {
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safe_to_use_expr(*e, tm)
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}
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pure fn safe_to_use_expr(e: ast::expr, tm: test_mode) -> bool {
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match tm {
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tm_converge => {
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match e.node {
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// If the fuzzer moves a block-ending-in-semicolon into callee
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// position, the pretty-printer can't preserve this even by
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// parenthesizing!! See email to marijn.
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ast::expr_if(_, _, _) => { false }
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ast::expr_block(_) => { false }
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ast::expr_match(_, _, _) => { false }
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ast::expr_while(_, _) => { false }
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// https://github.com/mozilla/rust/issues/929
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ast::expr_cast(_, _) => { false }
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ast::expr_assert(_) => { false }
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ast::expr_binary(_, _, _) => { false }
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ast::expr_assign(_, _) => { false }
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ast::expr_assign_op(_, _, _) => { false }
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ast::expr_fail(option::none) => { false }
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ast::expr_ret(option::none) => { false }
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// https://github.com/mozilla/rust/issues/953
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ast::expr_fail(option::some(_)) => { false }
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// https://github.com/mozilla/rust/issues/928
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//ast::expr_cast(_, _) { false }
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// https://github.com/mozilla/rust/issues/1458
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ast::expr_call(_, _, _) => { false }
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_ => { true }
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}
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}
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tm_run => { true }
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}
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}
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fn safe_to_steal_ty(t: @ast::ty, tm: test_mode) -> bool {
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// Restrictions happen to be the same.
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safe_to_replace_ty(t.node, tm)
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}
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// Not type-parameterized: https://github.com/mozilla/rust/issues/898 (FIXED)
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fn stash_expr_if(c: fn@(@ast::expr, test_mode)->bool,
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es: @mut ~[ast::expr],
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e: @ast::expr,
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tm: test_mode) {
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if c(e, tm) {
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*es += ~[*e];
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} else {/* now my indices are wrong :( */ }
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}
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fn stash_ty_if(c: fn@(@ast::ty, test_mode)->bool,
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es: @mut ~[ast::ty],
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e: @ast::ty,
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tm: test_mode) {
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if c(e, tm) {
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vec::push(*es,*e);
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} else {/* now my indices are wrong :( */ }
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}
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type stolen_stuff = {exprs: ~[ast::expr], tys: ~[ast::ty]};
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fn steal(crate: ast::crate, tm: test_mode) -> stolen_stuff {
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let exprs = @mut ~[];
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let tys = @mut ~[];
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let v = visit::mk_simple_visitor(@{
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visit_expr: |a| stash_expr_if(safe_to_steal_expr, exprs, a, tm),
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visit_ty: |a| stash_ty_if(safe_to_steal_ty, tys, a, tm)
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with *visit::default_simple_visitor()
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});
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visit::visit_crate(crate, (), v);
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{exprs: *exprs, tys: *tys}
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}
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fn safe_to_replace_expr(e: ast::expr_, _tm: test_mode) -> bool {
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match e {
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// https://github.com/mozilla/rust/issues/652
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ast::expr_if(*) => { false }
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ast::expr_block(_) => { false }
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// expr_call is also missing a constraint
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ast::expr_fn_block(*) => { false }
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_ => { true }
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}
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}
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fn safe_to_replace_ty(t: ast::ty_, _tm: test_mode) -> bool {
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match t {
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ast::ty_infer => { false } // always implicit, always top level
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ast::ty_bot => { false } // in source, can only appear
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// as the out type of a function
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ast::ty_mac(_) => { false }
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_ => { true }
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}
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}
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// Replace the |i|th expr (in fold order) of |crate| with |newexpr|.
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fn replace_expr_in_crate(crate: ast::crate, i: uint,
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newexpr: ast::expr, tm: test_mode) ->
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ast::crate {
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let j: @mut uint = @mut 0u;
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fn fold_expr_rep(j_: @mut uint, i_: uint, newexpr_: ast::expr_,
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original: ast::expr_, fld: fold::ast_fold,
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tm_: test_mode) ->
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ast::expr_ {
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*j_ += 1u;
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if i_ + 1u == *j_ && safe_to_replace_expr(original, tm_) {
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newexpr_
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} else {
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fold::noop_fold_expr(original, fld)
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}
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}
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let afp = @{
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fold_expr: fold::wrap(|a,b| {
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fold_expr_rep(j, i, newexpr.node, a, b, tm)
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})
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with *fold::default_ast_fold()
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};
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let af = fold::make_fold(afp);
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let crate2: @ast::crate = @af.fold_crate(crate);
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*crate2
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}
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// Replace the |i|th ty (in fold order) of |crate| with |newty|.
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fn replace_ty_in_crate(crate: ast::crate, i: uint, newty: ast::ty,
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tm: test_mode) -> ast::crate {
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let j: @mut uint = @mut 0u;
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fn fold_ty_rep(j_: @mut uint, i_: uint, newty_: ast::ty_,
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original: ast::ty_, fld: fold::ast_fold,
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tm_: test_mode) ->
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ast::ty_ {
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*j_ += 1u;
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if i_ + 1u == *j_ && safe_to_replace_ty(original, tm_) {
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newty_
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} else { fold::noop_fold_ty(original, fld) }
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}
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let afp = @{
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fold_ty: fold::wrap(|a,b| fold_ty_rep(j, i, newty.node, a, b, tm) )
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with *fold::default_ast_fold()
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};
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let af = fold::make_fold(afp);
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let crate2: @ast::crate = @af.fold_crate(crate);
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*crate2
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}
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fn under(n: uint, it: fn(uint)) {
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let mut i: uint = 0u;
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while i < n { it(i); i += 1u; }
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}
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fn devnull() -> io::writer { io::mem_buffer_writer(io::mem_buffer()) }
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fn as_str(f: fn@(io::writer)) -> ~str {
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let buf = io::mem_buffer();
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f(io::mem_buffer_writer(buf));
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io::mem_buffer_str(buf)
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}
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fn check_variants_of_ast(crate: ast::crate, codemap: codemap::codemap,
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filename: ~str, cx: context) {
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let stolen = steal(crate, cx.mode);
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let extra_exprs = vec::filter(common_exprs(),
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|a| safe_to_use_expr(a, cx.mode) );
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check_variants_T(crate, codemap, filename, ~"expr",
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extra_exprs + stolen.exprs, pprust::expr_to_str,
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replace_expr_in_crate, cx);
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check_variants_T(crate, codemap, filename, ~"ty", stolen.tys,
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pprust::ty_to_str, replace_ty_in_crate, cx);
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}
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fn check_variants_T<T: copy>(
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crate: ast::crate,
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codemap: codemap::codemap,
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filename: ~str,
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thing_label: ~str,
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things: ~[T],
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stringifier: fn@(@T) -> ~str,
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replacer: fn@(ast::crate, uint, T, test_mode) -> ast::crate,
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cx: context
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) {
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error!{"%s contains %u %s objects", filename,
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vec::len(things), thing_label};
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let L = vec::len(things);
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if L < 100u {
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do under(uint::min(L, 20u)) |i| {
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log(error, ~"Replacing... #" + uint::str(i));
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do under(uint::min(L, 30u)) |j| {
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log(error, ~"With... " + stringifier(@things[j]));
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let crate2 = @replacer(crate, i, things[j], cx.mode);
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// It would be best to test the *crate* for stability, but
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// testing the string for stability is easier and ok for now.
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let handler = diagnostic::mk_handler(none);
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let str3 =
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@as_str(|a|pprust::print_crate(
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codemap,
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// Assuming we're not generating any token_trees
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@syntax::util::interner::mk::<@~str>(
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|x| str::hash(*x), |x,y| str::eq(*x,*y)),
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diagnostic::mk_span_handler(handler, codemap),
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crate2,
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filename,
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io::str_reader(~""), a,
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pprust::no_ann(),
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false));
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match cx.mode {
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tm_converge => {
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check_roundtrip_convergence(str3, 1u);
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}
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tm_run => {
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let file_label = fmt!{"rusttmp/%s_%s_%u_%u",
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last_part(filename),
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thing_label, i, j};
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let safe_to_run = !(content_is_dangerous_to_run(*str3)
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|| has_raw_pointers(*crate2));
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check_whole_compiler(*str3, file_label, safe_to_run);
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}
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}
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}
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}
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}
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}
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fn last_part(filename: ~str) -> ~str {
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let ix = option::get(str::rfind_char(filename, '/'));
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str::slice(filename, ix + 1u, str::len(filename) - 3u)
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}
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enum happiness {
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passed,
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cleanly_rejected(~str),
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known_bug(~str),
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failed(~str),
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}
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// We'd find more bugs if we could take an AST here, but
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// - that would find many "false positives" or unimportant bugs
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// - that would be tricky, requiring use of tasks or serialization
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// or randomness.
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// This seems to find plenty of bugs as it is :)
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fn check_whole_compiler(code: ~str, suggested_filename_prefix: ~str,
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allow_running: bool) {
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let filename = suggested_filename_prefix + ~".rs";
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write_file(filename, code);
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let compile_result = check_compiling(filename);
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let run_result = match (compile_result, allow_running) {
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(passed, true) => { check_running(suggested_filename_prefix) }
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(h, _) => { h }
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};
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match run_result {
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passed | cleanly_rejected(_) | known_bug(_) => {
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removeIfExists(suggested_filename_prefix);
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removeIfExists(suggested_filename_prefix + ~".rs");
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removeDirIfExists(suggested_filename_prefix + ~".dSYM");
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}
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failed(s) => {
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log(error, ~"check_whole_compiler failure: " + s);
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log(error, ~"Saved as: " + filename);
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}
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}
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}
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fn removeIfExists(filename: ~str) {
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// So sketchy!
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assert !contains(filename, ~" ");
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run::program_output(~"bash", ~[~"-c", ~"rm " + filename]);
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}
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fn removeDirIfExists(filename: ~str) {
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// So sketchy!
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assert !contains(filename, ~" ");
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run::program_output(~"bash", ~[~"-c", ~"rm -r " + filename]);
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}
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fn check_running(exe_filename: ~str) -> happiness {
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let p = run::program_output(
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~"/Users/jruderman/scripts/timed_run_rust_program.py",
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~[exe_filename]);
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let comb = p.out + ~"\n" + p.err;
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if str::len(comb) > 1u {
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log(error, ~"comb comb comb: " + comb);
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}
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if contains(comb, ~"Assertion failed:") {
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failed(~"C++ assertion failure")
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} else if contains(comb, ~"leaked memory in rust main loop") {
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// might also use exit code 134
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//failed("Leaked")
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known_bug(~"https://github.com/mozilla/rust/issues/910")
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} else if contains(comb, ~"src/rt/") {
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failed(~"Mentioned src/rt/")
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} else if contains(comb, ~"malloc") {
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failed(~"Mentioned malloc")
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} else {
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match p.status {
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0 => { passed }
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100 => { cleanly_rejected(~"running: explicit fail") }
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101 | 247 => { cleanly_rejected(~"running: timed out") }
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245 | 246 | 138 | 252 => {
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known_bug(~"https://github.com/mozilla/rust/issues/1466")
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}
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136 | 248 => {
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known_bug(
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~"SIGFPE - https://github.com/mozilla/rust/issues/944")
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}
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rc => {
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failed(~"Rust program ran but exited with status " +
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int::str(rc))
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}
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}
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}
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}
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fn check_compiling(filename: ~str) -> happiness {
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let p = run::program_output(
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~"/Users/jruderman/code/rust/build/x86_64-apple-darwin/\
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stage1/bin/rustc",
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~[filename]);
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//error!{"Status: %d", p.status};
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if p.status == 0 {
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passed
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} else if p.err != ~"" {
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if contains(p.err, ~"error:") {
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cleanly_rejected(~"rejected with span_error")
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} else {
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log(error, ~"Stderr: " + p.err);
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failed(~"Unfamiliar error message")
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}
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} else if contains(p.out, ~"Assertion") && contains(p.out, ~"failed") {
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log(error, ~"Stdout: " + p.out);
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failed(~"Looks like an llvm assertion failure")
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} else if contains(p.out, ~"internal compiler error unimplemented") {
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known_bug(~"Something unimplemented")
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} else if contains(p.out, ~"internal compiler error") {
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log(error, ~"Stdout: " + p.out);
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failed(~"internal compiler error")
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} else {
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log(error, p.status);
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log(error, ~"!Stdout: " + p.out);
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failed(~"What happened?")
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}
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}
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fn parse_and_print(code: @~str) -> ~str {
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let filename = ~"tmp.rs";
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let sess = parse::new_parse_sess(option::none);
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write_file(filename, *code);
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let crate = parse::parse_crate_from_source_str(
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filename, code, ~[], sess);
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io::with_str_reader(*code, |rdr| {
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as_str(|a|
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pprust::print_crate(
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sess.cm,
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// Assuming there are no token_trees
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@syntax::util::interner::mk::<@~str>(
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|x| str::hash(*x), |x,y| str::eq(*x,*y)),
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sess.span_diagnostic,
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crate,
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filename,
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rdr, a,
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pprust::no_ann(),
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false) )
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})
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}
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fn has_raw_pointers(c: ast::crate) -> bool {
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let has_rp = @mut false;
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fn visit_ty(flag: @mut bool, t: @ast::ty) {
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match t.node {
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ast::ty_ptr(_) => { *flag = true; }
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_ => { }
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}
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}
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let v =
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visit::mk_simple_visitor(@{visit_ty: |a| visit_ty(has_rp, a)
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with *visit::default_simple_visitor()});
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visit::visit_crate(c, (), v);
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return *has_rp;
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}
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fn content_is_dangerous_to_run(code: ~str) -> bool {
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let dangerous_patterns =
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~[~"xfail-test",
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~"import", // espeically fs, run
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~"extern",
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~"unsafe",
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~"log"]; // python --> rust pipe deadlock?
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for dangerous_patterns.each |p| { if contains(code, p) { return true; } }
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return false;
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}
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fn content_is_dangerous_to_compile(code: ~str) -> bool {
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let dangerous_patterns =
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~[~"xfail-test"];
|
|
|
|
for dangerous_patterns.each |p| { if contains(code, p) { return true; } }
|
|
return false;
|
|
}
|
|
|
|
fn content_might_not_converge(code: ~str) -> bool {
|
|
let confusing_patterns =
|
|
~[~"xfail-test",
|
|
~"xfail-pretty",
|
|
~"self", // crazy rules enforced by parser not typechecker?
|
|
~"spawn", // precedence issues?
|
|
~"bind", // precedence issues?
|
|
~" be ", // don't want to replace its child with a non-call:
|
|
// "Non-call expression in tail call"
|
|
~"\n\n\n\n\n" // https://github.com/mozilla/rust/issues/850
|
|
];
|
|
|
|
for confusing_patterns.each |p| { if contains(code, p) { return true; } }
|
|
return false;
|
|
}
|
|
|
|
fn file_might_not_converge(filename: ~str) -> bool {
|
|
let confusing_files = ~[
|
|
~"expr-alt.rs", // pretty-printing "(a = b) = c"
|
|
// vs "a = b = c" and wrapping
|
|
~"block-arg-in-ternary.rs", // wrapping
|
|
~"move-3-unique.rs", // 0 becomes (0), but both seem reasonable. wtf?
|
|
~"move-3.rs" // 0 becomes (0), but both seem reasonable. wtf?
|
|
];
|
|
|
|
|
|
for confusing_files.each |f| { if contains(filename, f) { return true; } }
|
|
|
|
return false;
|
|
}
|
|
|
|
fn check_roundtrip_convergence(code: @~str, maxIters: uint) {
|
|
|
|
let mut i = 0u;
|
|
let mut newv = code;
|
|
let mut oldv = code;
|
|
|
|
while i < maxIters {
|
|
oldv = newv;
|
|
if content_might_not_converge(*oldv) { return; }
|
|
newv = @parse_and_print(oldv);
|
|
if oldv == newv { break; }
|
|
i += 1u;
|
|
}
|
|
|
|
if oldv == newv {
|
|
error!{"Converged after %u iterations", i};
|
|
} else {
|
|
error!{"Did not converge after %u iterations!", i};
|
|
write_file(~"round-trip-a.rs", *oldv);
|
|
write_file(~"round-trip-b.rs", *newv);
|
|
run::run_program(~"diff",
|
|
~[~"-w", ~"-u", ~"round-trip-a.rs",
|
|
~"round-trip-b.rs"]);
|
|
fail ~"Mismatch";
|
|
}
|
|
}
|
|
|
|
fn check_convergence(files: ~[~str]) {
|
|
error!{"pp convergence tests: %u files", vec::len(files)};
|
|
for files.each |file| {
|
|
if !file_might_not_converge(file) {
|
|
let s = @result::get(io::read_whole_file_str(file));
|
|
if !content_might_not_converge(*s) {
|
|
error!{"pp converge: %s", file};
|
|
// Change from 7u to 2u once
|
|
// https://github.com/mozilla/rust/issues/850 is fixed
|
|
check_roundtrip_convergence(s, 7u);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn check_variants(files: ~[~str], cx: context) {
|
|
for files.each |file| {
|
|
if cx.mode == tm_converge && file_might_not_converge(file) {
|
|
error!{"Skipping convergence test based on\
|
|
file_might_not_converge"};
|
|
again;
|
|
}
|
|
|
|
let s = @result::get(io::read_whole_file_str(file));
|
|
if contains(*s, ~"#") {
|
|
again; // Macros are confusing
|
|
}
|
|
if cx.mode == tm_converge && content_might_not_converge(*s) {
|
|
again;
|
|
}
|
|
if cx.mode == tm_run && content_is_dangerous_to_compile(*s) {
|
|
again;
|
|
}
|
|
|
|
log(error, ~"check_variants: " + file);
|
|
let sess = parse::new_parse_sess(option::none);
|
|
let crate =
|
|
parse::parse_crate_from_source_str(
|
|
file,
|
|
s, ~[], sess);
|
|
io::with_str_reader(*s, |rdr| {
|
|
error!{"%s",
|
|
as_str(|a| pprust::print_crate(
|
|
sess.cm,
|
|
// Assuming no token_trees
|
|
@syntax::util::interner::mk::<@~str>(
|
|
|x| str::hash(*x), |x,y| str::eq(*x,*y)),
|
|
sess.span_diagnostic,
|
|
crate,
|
|
file,
|
|
rdr, a,
|
|
pprust::no_ann(),
|
|
false) )}
|
|
});
|
|
check_variants_of_ast(*crate, sess.cm, file, cx);
|
|
}
|
|
}
|
|
|
|
fn main(args: ~[~str]) {
|
|
if vec::len(args) != 2u {
|
|
error!{"usage: %s <testdir>", args[0]};
|
|
return;
|
|
}
|
|
let mut files = ~[];
|
|
let root = args[1];
|
|
|
|
find_rust_files(files, root);
|
|
error!{"== check_convergence =="};
|
|
check_convergence(files);
|
|
error!{"== check_variants: converge =="};
|
|
check_variants(files, { mode: tm_converge });
|
|
error!{"== check_variants: run =="};
|
|
check_variants(files, { mode: tm_run });
|
|
|
|
error!{"Fuzzer done"};
|
|
}
|
|
|
|
// Local Variables:
|
|
// mode: rust;
|
|
// fill-column: 78;
|
|
// indent-tabs-mode: nil
|
|
// c-basic-offset: 4
|
|
// buffer-file-coding-system: utf-8-unix
|
|
// End:
|