Security-59306.11.20.tar.gz

[apple/security.git] / OSX / utilities / simulate_crash.c

diff --git a/OSX/utilities/simulate_crash.c b/OSX/utilities/simulate_crash.c
new file mode 100644 (file)
index 0000000..0ccd2f5
--- /dev/null
+++ b/OSX/utilities/simulate_crash.c
@@ -0,0 +1,98 @@
+//
+//  simulate_crash
+//  utilities
+//
+//  Copyright (c) 2014 Apple Inc. All Rights Reserved.
+//
+
+#include "debugging.h"
+
+#include <dispatch/dispatch.h>
+#include <dlfcn.h>
+#include <mach/mach.h>
+
+/// Type to represent a boolean value.
+#if TARGET_OS_IPHONE  &&  __LP64__
+typedef bool BOOL;
+#else
+typedef signed char BOOL;
+// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
+// even if -funsigned-char is used.
+#endif
+
+static void *
+__security_get_CrashReporterSupport(void)
+{
+    static void *image = NULL;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        image = dlopen("/System/Library/PrivateFrameworks/CrashReporterSupport.framework/CrashReporterSupport", RTLD_NOW);
+    });
+    return image;
+}
+
+static void __security_simulatecrash_link(CFStringRef reason, uint32_t code)
+{
+#if !TARGET_OS_SIMULATOR
+    // Prototype defined in <CrashReporterSupport/CrashReporterSupport.h>, but objC only.
+    // Soft linking here so we don't link unless we hit this.
+    static BOOL (*__SimulateCrash)(pid_t pid, mach_exception_data_type_t exceptionCode, CFStringRef description) = NULL;
+
+    static dispatch_once_t once = 0;
+    dispatch_once(&once, ^{
+        void *image = __security_get_CrashReporterSupport();
+        if (image)
+            __SimulateCrash = dlsym(image, "SimulateCrash");
+    });
+
+    if (__SimulateCrash)
+        __SimulateCrash(getpid(), code, reason);
+    else
+        secerror("SimulateCrash not available");
+#else
+    secerror("SimulateCrash not available in iOS simulator");
+#endif
+}
+
+static int __simulate_crash_counter = -1;
+
+void __security_simulatecrash(CFStringRef reason, uint32_t code)
+{
+    secerror("Simulating crash, reason: %@, code=%08x", reason, code);
+    if (__simulate_crash_counter < 0)
+        __security_simulatecrash_link(reason, code);
+    else
+        __simulate_crash_counter++;
+}
+
+void __security_stackshotreport(CFStringRef reason, uint32_t code)
+{
+    secerror("stackshot report, reason: %@, code=%08x", reason, code);
+#if !TARGET_OS_SIMULATOR
+    // Prototype defined in <CrashReporterSupport/CrashReporterSupport.h>, but objC only.
+    // Soft linking here so we don't link unless we hit this.
+    static BOOL (*__WriteStackshotReport)(void *, mach_exception_data_type_t) = NULL;
+
+    static dispatch_once_t once = 0;
+    dispatch_once(&once, ^{
+        void *image = __security_get_CrashReporterSupport();
+        if (image)
+            __WriteStackshotReport = dlsym(image, "WriteStackshotReport");
+    });
+
+    if (__WriteStackshotReport)
+        __WriteStackshotReport((void *)reason, code);
+    else
+        secerror("WriteStackshotReport not available");
+#else
+    secerror("WriteStackshotReport not available in iOS simulator");
+#endif
+}
+
+
+int __security_simulatecrash_enable(bool enable)
+{
+    int count = __simulate_crash_counter;
+    __simulate_crash_counter = enable ? -1 : 0;
+    return count;
+}