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banners=-,-,- X-VirusChecked: Checked Received: (qmail 39518 invoked from network); 11 Oct 2017 17:52:51 -0000 Received: from smtp02.citrix.com (HELO SMTP02.CITRIX.COM) (66.165.176.63) by server-14.tower-31.messagelabs.com with RC4-SHA encrypted SMTP; 11 Oct 2017 17:52:51 -0000 X-IronPort-AV: E=Sophos;i="5.43,362,1503360000"; d="scan'208";a="453461792" From: George Dunlap To: Date: Wed, 11 Oct 2017 18:52:33 +0100 Message-ID: <20171011175243.19871-2-george.dunlap@citrix.com> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171011175243.19871-1-george.dunlap@citrix.com> References: <20171011175243.19871-1-george.dunlap@citrix.com> MIME-Version: 1.0 Cc: Ian Jackson , Wei Liu , George Dunlap , Jan Beulich , Andrew Cooper Subject: [Xen-devel] [PATCH v4 02/12] fuzz/x86_emulate: Improve failure descriptions in x86_emulate harness X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP - Print the symbolic name rather than the number - Explicitly state when data_read() fails due to EOI Signed-off-by: George Dunlap Reviewed-by: Wei Liu Reviewed-by: Jan Beulich --- Changes in v4: - Make array 'static const char* const' Changes in v2: - Add spaces around '=' CC: Ian Jackson CC: Wei Liu CC: Andrew Cooper CC: Jan Beulich --- tools/fuzz/x86_instruction_emulator/fuzz-emul.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c index 48a879cc88..999f417716 100644 --- a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c +++ b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c @@ -52,6 +52,14 @@ struct fuzz_state struct x86_emulate_ops ops; }; +static const char* const x86emul_return_string[] = { + [X86EMUL_OKAY] = "X86EMUL_OKAY", + [X86EMUL_UNHANDLEABLE] = "X86EMUL_UNHANDLEABLE", + [X86EMUL_EXCEPTION] = "X86EMUL_EXCEPTION", + [X86EMUL_RETRY] = "X86EMUL_RETRY", + [X86EMUL_DONE] = "X86EMUL_DONE", +}; + /* * Randomly return success or failure when processing data. If * `exception` is false, this function turns _EXCEPTION to _OKAY. @@ -84,7 +92,7 @@ static int maybe_fail(struct x86_emulate_ctxt *ctxt, if ( rc == X86EMUL_EXCEPTION && !exception ) rc = X86EMUL_OKAY; - printf("maybe_fail %s: %d\n", why, rc); + printf("maybe_fail %s: %s\n", why, x86emul_return_string[rc]); if ( rc == X86EMUL_EXCEPTION ) /* Fake up a pagefault. */ @@ -113,6 +121,7 @@ static int data_read(struct x86_emulate_ctxt *ctxt, x86_emul_hw_exception(13, 0, ctxt); rc = X86EMUL_EXCEPTION; + printf("data_read %s: X86EMUL_EXCEPTION (end of input)\n", why); } else rc = maybe_fail(ctxt, why, true);