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/*
* mini-darwin.c: Darwin/MacOS support for Mono.
*
* Authors:
* Mono Team (mono-list@lists.ximian.com)
*
* Copyright 2001-2003 Ximian, Inc.
* Copyright 2003-2008 Ximian, Inc.
*
* See LICENSE for licensing information.
*/
#include <config.h>
#include <signal.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <mono/metadata/assembly.h>
#include <mono/metadata/loader.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/class.h>
#include <mono/metadata/object.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/io-layer/io-layer.h>
#include "mono/metadata/profiler.h"
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/mono-config.h>
#include <mono/metadata/environment.h>
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/verify.h>
#include <mono/metadata/verify-internals.h>
#include <mono/metadata/mempool-internals.h>
#include <mono/metadata/attach.h>
#include <mono/metadata/gc-internal.h>
#include <mono/utils/mono-math.h>
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-counters.h>
#include <mono/utils/mono-logger-internal.h>
#include <mono/utils/mono-mmap.h>
#include <mono/utils/dtrace.h>
#include "mini.h"
#include <string.h>
#include <ctype.h>
#include "trace.h"
#include "version.h"
#include "jit-icalls.h"
/* MacOS includes */
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <mach/exception.h>
#include <mach/task.h>
#include <pthread.h>
#include <dlfcn.h>
#include <AvailabilityMacros.h>
#if (MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_5) && !defined (TARGET_ARM)
#define NEEDS_EXCEPTION_THREAD
#endif
#ifdef NEEDS_EXCEPTION_THREAD
/*
* This code disables the CrashReporter of MacOS X by installing
* a dummy Mach exception handler.
*/
/*
* http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/exc_server.html
*/
extern boolean_t exc_server (mach_msg_header_t *request_msg, mach_msg_header_t *reply_msg);
/*
* The exception message
*/
typedef struct {
mach_msg_base_t msg; /* common mach message header */
char payload [1024]; /* opaque */
} mach_exception_msg_t;
/* The exception port */
static mach_port_t mach_exception_port = VM_MAP_NULL;
/*
* Implicitly called by exc_server. Must be public.
*
* http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/catch_exception_raise.html
*/
kern_return_t
catch_exception_raise (
mach_port_t exception_port,
mach_port_t thread,
mach_port_t task,
exception_type_t exception,
exception_data_t code,
mach_msg_type_number_t code_count)
{
/* consume the exception */
return KERN_FAILURE;
}
/*
* Exception thread handler.
*/
static
void *
mach_exception_thread (void *arg)
{
for (;;) {
mach_exception_msg_t request;
mach_exception_msg_t reply;
mach_msg_return_t result;
/* receive from "mach_exception_port" */
result = mach_msg (&request.msg.header,
MACH_RCV_MSG | MACH_RCV_LARGE,
0,
sizeof (request),
mach_exception_port,
MACH_MSG_TIMEOUT_NONE,
MACH_PORT_NULL);
g_assert (result == MACH_MSG_SUCCESS);
/* dispatch to catch_exception_raise () */
exc_server (&request.msg.header, &reply.msg.header);
/* send back to sender */
result = mach_msg (&reply.msg.header,
MACH_SEND_MSG,
reply.msg.header.msgh_size,
0,
MACH_PORT_NULL,
MACH_MSG_TIMEOUT_NONE,
MACH_PORT_NULL);
g_assert (result == MACH_MSG_SUCCESS);
}
return NULL;
}
static void
macosx_register_exception_handler ()
{
mach_port_t task;
pthread_attr_t attr;
pthread_t thread;
if (mach_exception_port != VM_MAP_NULL)
return;
task = mach_task_self ();
/* create the "mach_exception_port" with send & receive rights */
g_assert (mach_port_allocate (task, MACH_PORT_RIGHT_RECEIVE,
&mach_exception_port) == KERN_SUCCESS);
g_assert (mach_port_insert_right (task, mach_exception_port, mach_exception_port,
MACH_MSG_TYPE_MAKE_SEND) == KERN_SUCCESS);
/* create the exception handler thread */
g_assert (!pthread_attr_init (&attr));
g_assert (!pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED));
g_assert (!pthread_create (&thread, &attr, mach_exception_thread, NULL));
pthread_attr_destroy (&attr);
/*
* register "mach_exception_port" as a receiver for the
* EXC_BAD_ACCESS exception
*
* http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/task_set_exception_ports.html
*/
g_assert (task_set_exception_ports (task, EXC_MASK_BAD_ACCESS,
mach_exception_port,
EXCEPTION_DEFAULT,
MACHINE_THREAD_STATE) == KERN_SUCCESS);
mono_gc_register_mach_exception_thread (thread);
}
#endif
/* This is #define'd by Boehm GC to _GC_dlopen. */
#undef dlopen
void
mono_runtime_install_handlers (void)
{
#ifdef NEEDS_EXCEPTION_THREAD
macosx_register_exception_handler ();
#endif
mono_runtime_posix_install_handlers ();
/* Snow Leopard has a horrible bug: http://openradar.appspot.com/7209349
* This causes obscure SIGTRAP's for any application that comes across this built on
* Snow Leopard. This is a horrible hack to ensure that the private __CFInitialize
* is run on the main thread, so that we don't get SIGTRAPs later
*/
#if defined (__APPLE__) && (defined (__i386__) || defined (__x86_64__))
{
void *handle = dlopen ("/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation", RTLD_LAZY);
if (handle == NULL)
return;
dlclose (handle);
}
#endif
}
pid_t
mono_runtime_syscall_fork ()
{
return (pid_t) fork ();
}
gboolean
mono_gdb_render_native_backtraces (pid_t crashed_pid)
{
const char *argv [5];
char gdb_template [] = "/tmp/mono-gdb-commands.XXXXXX";
argv [0] = g_find_program_in_path ("gdb");
if (argv [0] == NULL) {
return FALSE;
}
if (mkstemp (gdb_template) != -1) {
FILE *gdb_commands = fopen (gdb_template, "w");
fprintf (gdb_commands, "attach %ld\n", (long) crashed_pid);
fprintf (gdb_commands, "info threads\n");
fprintf (gdb_commands, "thread apply all bt\n");
fflush (gdb_commands);
fclose (gdb_commands);
argv [1] = "-batch";
argv [2] = "-x";
argv [3] = gdb_template;
argv [4] = 0;
execv (argv [0], (char**)argv);
unlink (gdb_template);
}
return TRUE;
}
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