When looking up an entry in the rend_cache, stop asserting that it exists but
rather confirm it exists and if not, return that no entry was found.

The reason for that is because the hs_circ_cleanup_on_free() function (which
can end up looking at the rend_cache) can be called from the
circuit_free_all() function that is called _after_ the rend cache is cleaned
up in tor_free_all().

We could fix the free all ordering but then it will just hide a future bug.
Instead, handle a missing rend_cache as a valid use case as in while we are in
the cleanup process.

As Tor becomes more modular, it is getting more and more difficult to ensure
subsystem callstack ordering thus this fix aims at making the HSv2 subsystem
more robust at being called while tor is pretty much in any kind of state.

Fixes #32847.

Signed-off-by: David Goulet <dgoulet@torproject.org>

We never used them very much, and although they had potential to
clarify some of our tests, they also made some of the logic harder
for people to follow.  Clang-format can't make head or tail of them,
so the time has come to say goodbye to them.

This is an automatically generated commit, made with the following
kludgey perl script. It results in a number of wide lines, which
I'll clean up in a subsequent commit.

#/usr/bin/perl -w -i
$mod = "NS_MODULE";
$submod = "NS_SUBMODULE";
$last_was_empty = 0;

while (<>) {

    s/\bASPECT\(\s*(\w+)\s*,\s*(\w+)\s*\)/$1_$2/;

    if (/# *define +NS_MODULE +(\w+)/) {
        $mod = $1;
        next;
    } elsif (/# *define +NS_SUBMODULE +(\w+)/) {
        $submod = $1;
        next;
    }

    next if (/#undef NS_(SUB)?MODULE/);

    s/NS\(\s*test_main\s*\)/test_${mod}_${submod}/;
    s/NS\(\s*(\w+)\s*\)/${mod}_${submod}_$1/g;
    s/NS_FULL\(\\s*(\w+)\s*,\s*(\w+),\s*(\w+)\s*\)/$1_$2_$3/;
    s/^(\s*)NS_MOCK\(\s*(\w+)\s*\)/$1MOCK($2,\n$1     ${mod}_${submod}_$2)/;
    s/NS_UNMOCK\(\s*(\w+)\s*\)/UNMOCK($1)/;
    s/TEST_CASE\(\s*(\w+)\s*\)/{ "$1", test_${mod}_$1, TT_FORK, NULL, NULL }/;
    s/TEST_CASE_ASPECT\(\s*(\w+)\s*,\s*(\w+)\s*\)/{ "$1_$2", test_${mod}_$1_$2, TT_FORK, NULL, NULL }/;
    s/NS_DECL\(\s*([^,]+)\s*,\s*([^,]+)\s*,\s*(\(.*)\);/static $1 ${mod}_${submod}_$2$3;\nATTR_UNUSED static int ${mod}_${submod}_$2_called = 0;/;
    s/\bCALLED\(\s*(\w+)\s*\)/${mod}_${submod}_$1_called/;

    if (/^$/) {
        print if (! $last_was_empty);
        $last_was_empty = 1;
    } else {
        $last_was_empty = 0;
        print;
    }

    if (eof) {
        $mod = "NS_MODULE";
        $submod = "NS_SUBMODULE";
        $last_was_empty = 0;
    }
}

# Please enter the commit message for your changes. Lines starting
# with '#' will be kept; you may remove them yourself if you want to.
# An empty message aborts the commit.
#
# Date:      Thu Jan 9 10:26:10 2020 -0500
#
# On branch disable_ns_macro
# Changes to be committed:
#	modified:   src/test/test_accounting.c
#	modified:   src/test/test_compat_libevent.c
#	modified:   src/test/test_dir.c
#	modified:   src/test/test_dir_handle_get.c
#	modified:   src/test/test_dns.c
#	modified:   src/test/test_options.c
#	modified:   src/test/test_procmon.c
#	modified:   src/test/test_rendcache.c
#	modified:   src/test/test_router.c
#	modified:   src/test/test_routerset.c
#	modified:   src/test/test_status.c
#	modified:   src/test/test_tortls.c
#	modified:   src/test/test_tortls_openssl.c
#	modified:   src/test/test_util_format.c
#	modified:   src/test/test_util_process.c
#
# Untracked files:
#	experiments/
#	locate_options.sh
#	un_ns.pl
#

# Please enter the commit message for your changes. Lines starting
# with '#' will be kept; you may remove them yourself if you want to.
# An empty message aborts the commit.
#
# Date:      Thu Jan 9 10:26:10 2020 -0500
#
# On branch disable_ns_macro
# Changes to be committed:
#	modified:   src/test/test_accounting.c
#	modified:   src/test/test_compat_libevent.c
#	modified:   src/test/test_dir.c
#	modified:   src/test/test_dir_handle_get.c
#	modified:   src/test/test_dns.c
#	modified:   src/test/test_options.c
#	modified:   src/test/test_procmon.c
#	modified:   src/test/test_rendcache.c
#	modified:   src/test/test_router.c
#	modified:   src/test/test_routerset.c
#	modified:   src/test/test_status.c
#	modified:   src/test/test_tortls.c
#	modified:   src/test/test_tortls_openssl.c
#	modified:   src/test/test_util_format.c
#	modified:   src/test/test_util_process.c
#
# Untracked files:
#	experiments/
#	locate_options.sh
#	un_ns.pl
#

This will help avoid wide lines in our output.

This is going to make my script happier; these lines will soon
disappear.

When these macros aren't defined, the expansions of the NS macros
can get particularly ugly.

We use bool, so we should include stdbool.

This frees us from a dependency on include order.

This change means that authmode.h no longer needs to see
or_options_t, and frees us from an ordering dependency.

Without this change, compilation success depends on include order in
several tricky ways.

This prevents a dependency on include order.

This fixes a case where our compilation would depend on include order.

Without this include, our compilation depends more on include order.

This lets us avoid a dependency on include order.

This frees us from some dependencies on include order.

This frees us from some dependencies on include order.

Doing this frees us from some assumptions about include order.

Using these frees us from several dependencies on include order.

Doing this gives us a valid uint64_t type, freeing us from
dependencies on include order.

This frees us from a dependency on include order.

This frees us from some dependencies on include order.

This gives us the definition of tor_x509_cert_impl_t, and makes us
less dependent on include order.

Otherwise our compilation depends on include order.

Also, include torerr.h from ht.h if we are using raw_assert.

Otherwise, our includes need to be ordered so that ht.h comes after
util_log.h.

We were actually omitting the semicolon in a few places, leading to
confusing indentation and some cocci failures.

This is an automated commit, generated by:

perl -i -pe 'next if /define/; s/((?:ENABLE|DISABLE)_GCC_WARNING)\(([A-Za-z0-9_\-]+)\)/$1(\"-W$2\")/' src/*/*/*.[ch] src/*/*.[ch]

teor authored 5 years ago and Nick Mathewson committed 5 years ago

If they are inconsistent, output a raw bug log.

Part of 32845.

Also, add a CTASSERT() to make sure that we don't let this array get
out-of-sync again.

Found by coverity; this is CID 1457528.

These test cases are validated differently by some
programming languages, because those languages have
incorrect UTF-8 implementations.

We want to make sure that tor validates them correctly.

Closes ticket 32845.