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124 lines
4.4 KiB
Diff
124 lines
4.4 KiB
Diff
From de3f4ee9a5bd2adcb5ff2e1690db2567fda1473c Mon Sep 17 00:00:00 2001
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From: Xi Ruoyao <xry111@mengyan1223.wang>
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Date: Mon, 28 Jun 2021 13:54:58 +0800
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Subject: [PATCH] fixinc: don't "fix" machine names in __has_include(...)
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[PR91085]
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fixincludes/
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PR other/91085
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* fixfixes.c (check_has_inc): New static function.
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(machine_name_fix): Don't replace header names in
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__has_include(...).
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* inclhack.def (machine_name): Adjust test.
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* tests/base/testing.h: Update.
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Upstream: 6bf383c37e6131a8e247e8a0997d55d65c830b6d
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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fixincludes/fixfixes.c | 45 ++++++++++++++++++++++++++++++--
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fixincludes/inclhack.def | 3 ++-
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fixincludes/tests/base/testing.h | 2 +-
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3 files changed, 46 insertions(+), 4 deletions(-)
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diff --git a/fixincludes/fixfixes.c b/fixincludes/fixfixes.c
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index 5b23a8b640d..404b420f302 100644
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--- a/fixincludes/fixfixes.c
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+++ b/fixincludes/fixfixes.c
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@@ -477,6 +477,39 @@ FIX_PROC_HEAD( char_macro_def_fix )
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fputs (text, stdout);
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}
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+/* Check if the pattern at pos is actually in a "__has_include(...)"
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+ directive. Return the pointer to the ')' of this
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+ "__has_include(...)" if it is, NULL otherwise. */
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+static const char *
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+check_has_inc (const char *begin, const char *pos, const char *end)
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+{
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+ static const char has_inc[] = "__has_include";
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+ const size_t has_inc_len = sizeof (has_inc) - 1;
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+ const char *p;
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+
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+ for (p = memmem (begin, pos - begin, has_inc, has_inc_len);
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+ p != NULL;
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+ p = memmem (p, pos - p, has_inc, has_inc_len))
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+ {
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+ p += has_inc_len;
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+ while (p < end && ISSPACE (*p))
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+ p++;
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+
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+ /* "__has_include" may appear as "defined(__has_include)",
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+ search for the next appearance then. */
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+ if (*p != '(')
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+ continue;
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+
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+ /* To avoid too much complexity, just hope there is never a
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+ ')' in a header name. */
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+ p = memchr (p, ')', end - p);
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+ if (p == NULL || p > pos)
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+ return p;
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+ }
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+
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+ return NULL;
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+}
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+
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/* Fix for machine name #ifdefs that are not in the namespace reserved
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by the C standard. They won't be defined if compiling with -ansi,
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and the headers will break. We go to some trouble to only change
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@@ -524,7 +557,7 @@ FIX_PROC_HEAD( machine_name_fix )
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/* If the 'name_pat' matches in between base and limit, we have
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a bogon. It is not worth the hassle of excluding comments
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because comments on #if/#ifdef lines are rare, and strings on
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- such lines are illegal.
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+ such lines are only legal in a "__has_include" directive.
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REG_NOTBOL means 'base' is not at the beginning of a line, which
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shouldn't matter since the name_re has no ^ anchor, but let's
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@@ -544,8 +577,16 @@ FIX_PROC_HEAD( machine_name_fix )
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break;
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p = base + match[0].rm_so;
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- base += match[0].rm_eo;
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+ /* Check if the match is in __has_include(...) (PR 91085). */
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+ q = check_has_inc (base, p, limit);
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+ if (q)
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+ {
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+ base = q + 1;
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+ goto again;
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+ }
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+
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+ base += match[0].rm_eo;
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/* One more test: if on the same line we have the same string
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with the appropriate underscores, then leave it alone.
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We want exactly two leading and trailing underscores. */
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diff --git a/fixincludes/inclhack.def b/fixincludes/inclhack.def
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index 066bef99162..b7ad6982e96 100644
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--- a/fixincludes/inclhack.def
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+++ b/fixincludes/inclhack.def
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@@ -3154,7 +3154,8 @@ fix = {
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c_fix = machine_name;
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test_text = "/* MACH_DIFF: */\n"
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- "#if defined( i386 ) || defined( sparc ) || defined( vax )"
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+ "#if defined( i386 ) || defined( sparc ) || defined( vax ) || "
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+ "defined( linux ) || __has_include ( <linux.h> )"
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"\n/* no uniform test, so be careful :-) */";
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};
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diff --git a/fixincludes/tests/base/testing.h b/fixincludes/tests/base/testing.h
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index cf95321fb86..8b3accaf04e 100644
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--- a/fixincludes/tests/base/testing.h
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+++ b/fixincludes/tests/base/testing.h
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@@ -64,7 +64,7 @@ BSD43__IOWR('T', 1) /* Some are multi-line */
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#if defined( MACHINE_NAME_CHECK )
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/* MACH_DIFF: */
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-#if defined( i386 ) || defined( sparc ) || defined( vax )
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+#if defined( i386 ) || defined( sparc ) || defined( vax ) || defined( linux ) || __has_include ( <linux.h> )
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/* no uniform test, so be careful :-) */
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#endif /* MACHINE_NAME_CHECK */
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--
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2.37.3
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