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commit b2f32e746492615a6eb3e66fac1e766e32e8deb1
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Thu Jul 21 12:12:08 2022 +0200
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malloc: Simplify implementation of __malloc_assert
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It is prudent not to run too much code after detecting heap
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corruption, and __fxprintf is really complex. The line number
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and file name do not carry much information, so it is not included
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in the error message. (__libc_message only supports %s formatting.)
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The function name and assertion should provide some context.
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Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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(cherry picked from commit ac8047cdf326504f652f7db97ec96c0e0cee052f)
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diff --git a/malloc/malloc.c b/malloc/malloc.c
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index 7882c70f0a0312d1..d31e985ecce968fe 100644
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--- a/malloc/malloc.c
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+++ b/malloc/malloc.c
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@@ -294,19 +294,14 @@
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# define __assert_fail(assertion, file, line, function) \
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__malloc_assert(assertion, file, line, function)
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-extern const char *__progname;
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-
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-static void
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+_Noreturn static void
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__malloc_assert (const char *assertion, const char *file, unsigned int line,
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const char *function)
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{
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- (void) __fxprintf (NULL, "%s%s%s:%u: %s%sAssertion `%s' failed.\n",
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- __progname, __progname[0] ? ": " : "",
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- file, line,
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- function ? function : "", function ? ": " : "",
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- assertion);
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- fflush (stderr);
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- abort ();
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+ __libc_message (do_abort, "\
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+Fatal glibc error: malloc assertion failure in %s: %s\n",
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+ function, assertion);
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+ __builtin_unreachable ();
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}
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#endif
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#endif
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