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init.c
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init.c
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// This file is a part of Julia. License is MIT: http:https://julialang.org/license
/*
init.c
system initialization and global state
*/
#include "platform.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__)
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/mman.h>
#include <unistd.h>
#endif
#if defined(__APPLE__)
#include <AvailabilityMacros.h>
#define __need_ucontext64_t
#ifdef MAC_OS_X_VERSION_10_10
#include <sys/_types/_ucontext64.h>
#else
#include <machine/_structs.h>
#endif
#endif
#include <errno.h>
#include <signal.h>
#if !defined(_OS_WINDOWS_) || defined(_COMPILER_MINGW_)
#include <getopt.h>
#endif
#include "julia.h"
#include "julia_internal.h"
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _MSC_VER
DLLEXPORT char * dirname(char *);
#else
#include <libgen.h>
#endif
#ifdef _OS_WINDOWS_
#define WIN32_LEAN_AND_MEAN
// Copied from MINGW_FLOAT_H which may not be found due to a collision with the builtin gcc float.h
// eventually we can probably integrate this into OpenLibm.
#if defined(_COMPILER_MINGW_)
void __cdecl __MINGW_NOTHROW _fpreset (void);
void __cdecl __MINGW_NOTHROW fpreset (void);
#else
void __cdecl _fpreset (void);
void __cdecl fpreset (void);
#endif
#define _FPE_INVALID 0x81
#define _FPE_DENORMAL 0x82
#define _FPE_ZERODIVIDE 0x83
#define _FPE_OVERFLOW 0x84
#define _FPE_UNDERFLOW 0x85
#define _FPE_INEXACT 0x86
#define _FPE_UNEMULATED 0x87
#define _FPE_SQRTNEG 0x88
#define _FPE_STACKOVERFLOW 0x8a
#define _FPE_STACKUNDERFLOW 0x8b
#define _FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
#include <windows.h>
#include <dbghelp.h>
#include <io.h>
extern int needsSymRefreshModuleList;
extern BOOL (WINAPI *hSymRefreshModuleList)(HANDLE);
#endif
DLLEXPORT void jlbacktrace();
DLLEXPORT void gdbbacktrace();
DLLEXPORT void gdblookup(ptrint_t ip);
static const char system_image_path[256] = JL_SYSTEM_IMAGE_PATH;
jl_options_t jl_options = { 0, // quiet
NULL, // julia_home
NULL, // julia_bin
NULL, // build_path
NULL, // eval
NULL, // print
NULL, // postboot
NULL, // load
system_image_path, // image_file
NULL, // cpu_taget ("native", "core2", etc...)
0, // nprocs
NULL, // machinefile
0, // isinteractive
0, // color
JL_OPTIONS_HISTORYFILE_ON, // historyfile
0, // startupfile
JL_OPTIONS_COMPILE_DEFAULT, // compile_enabled
0, // code_coverage
0, // malloc_log
0, // opt_level
JL_OPTIONS_CHECK_BOUNDS_DEFAULT, // check_bounds
JL_OPTIONS_DUMPBITCODE_OFF, // dump_bitcode
1, // depwarn
1, // can_inline
JL_OPTIONS_FAST_MATH_DEFAULT,
0, // worker
NULL, // bindto
JL_OPTIONS_HANDLE_SIGNALS_ON,
};
int jl_boot_file_loaded = 0;
int exit_on_sigint = 0;
char *jl_stack_lo;
char *jl_stack_hi;
size_t jl_page_size;
static void jl_find_stack_bottom(void)
{
size_t stack_size;
#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__)
struct rlimit rl;
// When using memory sanitizer, increase stack size because msan bloats stack usage
#if defined(__has_feature)
#if __has_feature(memory_sanitizer)
const rlim_t kStackSize = 32 * 1024 * 1024; // 32MB stack
int result;
result = getrlimit(RLIMIT_STACK, &rl);
if (result == 0)
{
if (rl.rlim_cur < kStackSize)
{
rl.rlim_cur = kStackSize;
result = setrlimit(RLIMIT_STACK, &rl);
if (result != 0)
{
fprintf(stderr, "setrlimit returned result = %d\n", result);
}
}
}
#endif
#endif
getrlimit(RLIMIT_STACK, &rl);
stack_size = rl.rlim_cur;
#else
stack_size = 262144; // guess
#endif
jl_stack_hi = (char*)&stack_size;
jl_stack_lo = jl_stack_hi - stack_size;
}
// what to do on SIGINT
DLLEXPORT void jl_sigint_action(void)
{
if (exit_on_sigint) jl_exit(0);
jl_throw(jl_interrupt_exception);
}
#ifdef _OS_WINDOWS_
static char *strsignal(int sig)
{
switch (sig) {
case SIGINT: return "SIGINT"; break;
case SIGILL: return "SIGILL"; break;
case SIGABRT_COMPAT: return "SIGABRT_COMPAT"; break;
case SIGFPE: return "SIGFPE"; break;
case SIGSEGV: return "SIGSEGV"; break;
case SIGTERM: return "SIGTERM"; break;
case SIGBREAK: return "SIGBREAK"; break;
case SIGABRT: return "SIGABRT"; break;
}
return "?";
}
void __cdecl crt_sig_handler(int sig, int num)
{
switch (sig) {
case SIGFPE:
fpreset();
signal(SIGFPE, (void (__cdecl *)(int))crt_sig_handler);
switch(num) {
case _FPE_INVALID:
case _FPE_OVERFLOW:
case _FPE_UNDERFLOW:
default:
jl_errorf("Unexpected FPE Error 0x%X", num);
break;
case _FPE_ZERODIVIDE:
jl_throw(jl_diverror_exception);
break;
}
break;
case SIGINT:
signal(SIGINT, (void (__cdecl *)(int))crt_sig_handler);
if (jl_defer_signal) {
jl_signal_pending = sig;
}
else {
jl_signal_pending = 0;
jl_sigint_action();
}
break;
default: // SIGSEGV, (SSIGTERM, IGILL)
ios_printf(ios_stderr,"\nsignal (%d): %s\n", sig, strsignal(sig));
bt_size = rec_backtrace(bt_data, MAX_BT_SIZE);
jlbacktrace();
raise(sig);
}
}
#else
void fpe_handler(int arg)
{
(void)arg;
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset, SIGFPE);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
jl_throw(jl_diverror_exception);
}
#endif
#ifndef _OS_WINDOWS_
static int is_addr_on_stack(void *addr)
{
#ifdef COPY_STACKS
return ((char*)addr > (char*)jl_stack_lo-3000000 &&
(char*)addr < (char*)jl_stack_hi);
#else
return ((char*)addr > (char*)jl_current_task->stack-8192 &&
(char*)addr < (char*)jl_current_task->stack+jl_current_task->ssize);
#endif
}
#ifndef SIGINFO
#define SIGINFO SIGUSR1
#endif
void sigdie_handler(int sig, siginfo_t *info, void *context)
{
if (sig != SIGINFO) {
sigset_t sset;
uv_tty_reset_mode();
sigfillset(&sset);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
signal(sig, SIG_DFL);
}
jl_safe_printf("\nsignal (%d): %s\n", sig, strsignal(sig));
#ifdef __APPLE__
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, (bt_context_t)&((ucontext64_t*)context)->uc_mcontext64->__ss);
#else
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, (ucontext_t*)context);
#endif
jlbacktrace();
if (sig != SIGSEGV &&
sig != SIGBUS &&
sig != SIGILL &&
sig != SIGINFO) {
raise(sig);
}
}
#endif
#if defined(__linux__) || defined(__FreeBSD__)
extern int in_jl_;
void segv_handler(int sig, siginfo_t *info, void *context)
{
sigset_t sset;
if (sig == SIGSEGV && (in_jl_ || is_addr_on_stack(info->si_addr))) { // stack overflow
sigemptyset(&sset);
sigaddset(&sset, SIGSEGV);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
jl_throw(jl_stackovf_exception);
}
else if (info->si_code == SEGV_ACCERR) { // writing to read-only memory (e.g., mmap)
sigemptyset(&sset);
sigaddset(&sset, SIGSEGV);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
jl_throw(jl_readonlymemory_exception);
}
#ifdef SEGV_EXCEPTION
else {
sigemptyset(&sset);
sigaddset(&sset, SIGSEGV);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
jl_throw(jl_segv_exception);
}
#else
else {
sigdie_handler(sig, info, context);
}
#endif
}
#endif
volatile sig_atomic_t jl_signal_pending = 0;
volatile sig_atomic_t jl_defer_signal = 0;
#ifdef _OS_WINDOWS_
BOOL (*pSetThreadStackGuarantee)(PULONG);
void restore_signals(void)
{
SetConsoleCtrlHandler(NULL, 0); //turn on ctrl-c handler
}
void jl_throw_in_ctx(jl_value_t *excpt, CONTEXT *ctxThread, int bt)
{
assert(excpt != NULL);
#if defined(_CPU_X86_64_)
DWORD64 Rsp = (ctxThread->Rsp&(DWORD64)-16) - 8;
#elif defined(_CPU_X86_)
DWORD32 Esp = (ctxThread->Esp&(DWORD32)-16) - 4;
#else
#error WIN16 not supported :P
#endif
bt_size = bt ? rec_backtrace_ctx(bt_data, MAX_BT_SIZE, ctxThread) : 0;
jl_exception_in_transit = excpt;
#if defined(_CPU_X86_64_)
*(DWORD64*)Rsp = 0;
ctxThread->Rsp = Rsp;
ctxThread->Rip = (DWORD64)&jl_rethrow;
#elif defined(_CPU_X86_)
*(DWORD32*)Esp = 0;
ctxThread->Esp = Esp;
ctxThread->Eip = (DWORD)&jl_rethrow;
#endif
}
volatile HANDLE hMainThread = NULL;
static BOOL WINAPI sigint_handler(DWORD wsig) //This needs winapi types to guarantee __stdcall
{
int sig;
//windows signals use different numbers from unix (raise)
switch(wsig) {
case CTRL_C_EVENT: sig = SIGINT; break;
//case CTRL_BREAK_EVENT: sig = SIGTERM; break;
// etc.
default: sig = SIGTERM; break;
}
if (jl_defer_signal) {
jl_signal_pending = sig;
}
else {
jl_signal_pending = 0;
if (exit_on_sigint) jl_exit(0);
if ((DWORD)-1 == SuspendThread(hMainThread)) {
//error
jl_safe_printf("error: SuspendThread failed\n");
return 0;
}
CONTEXT ctxThread;
memset(&ctxThread,0,sizeof(CONTEXT));
ctxThread.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
if (!GetThreadContext(hMainThread, &ctxThread)) {
//error
jl_safe_printf("error: GetThreadContext failed\n");
return 0;
}
jl_throw_in_ctx(jl_interrupt_exception, &ctxThread, 1);
ctxThread.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
if (!SetThreadContext(hMainThread,&ctxThread)) {
jl_safe_printf("error: SetThreadContext failed\n");
//error
return 0;
}
if ((DWORD)-1 == ResumeThread(hMainThread)) {
jl_safe_printf("error: ResumeThread failed\n");
//error
return 0;
}
}
return 1;
}
static LONG WINAPI _exception_handler(struct _EXCEPTION_POINTERS *ExceptionInfo, int in_ctx)
{
if (ExceptionInfo->ExceptionRecord->ExceptionFlags == 0) {
switch (ExceptionInfo->ExceptionRecord->ExceptionCode) {
case EXCEPTION_INT_DIVIDE_BY_ZERO:
fpreset();
jl_throw_in_ctx(jl_diverror_exception, ExceptionInfo->ContextRecord,in_ctx);
return EXCEPTION_CONTINUE_EXECUTION;
case EXCEPTION_STACK_OVERFLOW:
jl_throw_in_ctx(jl_stackovf_exception, ExceptionInfo->ContextRecord,in_ctx&&pSetThreadStackGuarantee);
return EXCEPTION_CONTINUE_EXECUTION;
case EXCEPTION_ACCESS_VIOLATION:
if (ExceptionInfo->ExceptionRecord->ExceptionInformation[0] == 1) { // writing to read-only memory (e.g. mmap)
jl_throw_in_ctx(jl_readonlymemory_exception, ExceptionInfo->ContextRecord,in_ctx);
return EXCEPTION_CONTINUE_EXECUTION;
}
}
jl_safe_printf("\nPlease submit a bug report with steps to reproduce this fault, and any error messages that follow (in their entirety). Thanks.\nException: ");
switch (ExceptionInfo->ExceptionRecord->ExceptionCode) {
case EXCEPTION_ACCESS_VIOLATION:
jl_safe_printf("EXCEPTION_ACCESS_VIOLATION"); break;
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
jl_safe_printf("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); break;
case EXCEPTION_BREAKPOINT:
jl_safe_printf("EXCEPTION_BREAKPOINT"); break;
case EXCEPTION_DATATYPE_MISALIGNMENT:
jl_safe_printf("EXCEPTION_DATATYPE_MISALIGNMENT"); break;
case EXCEPTION_FLT_DENORMAL_OPERAND:
jl_safe_printf("EXCEPTION_FLT_DENORMAL_OPERAND"); break;
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
jl_safe_printf("EXCEPTION_FLT_DIVIDE_BY_ZERO"); break;
case EXCEPTION_FLT_INEXACT_RESULT:
jl_safe_printf("EXCEPTION_FLT_INEXACT_RESULT"); break;
case EXCEPTION_FLT_INVALID_OPERATION:
jl_safe_printf("EXCEPTION_FLT_INVALID_OPERATION"); break;
case EXCEPTION_FLT_OVERFLOW:
jl_safe_printf("EXCEPTION_FLT_OVERFLOW"); break;
case EXCEPTION_FLT_STACK_CHECK:
jl_safe_printf("EXCEPTION_FLT_STACK_CHECK"); break;
case EXCEPTION_FLT_UNDERFLOW:
jl_safe_printf("EXCEPTION_FLT_UNDERFLOW"); break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
jl_safe_printf("EXCEPTION_ILLEGAL_INSTRUCTION"); break;
case EXCEPTION_IN_PAGE_ERROR:
jl_safe_printf("EXCEPTION_IN_PAGE_ERROR"); break;
case EXCEPTION_INT_DIVIDE_BY_ZERO:
jl_safe_printf("EXCEPTION_INT_DIVIDE_BY_ZERO"); break;
case EXCEPTION_INT_OVERFLOW:
jl_safe_printf("EXCEPTION_INT_OVERFLOW"); break;
case EXCEPTION_INVALID_DISPOSITION:
jl_safe_printf("EXCEPTION_INVALID_DISPOSITION"); break;
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
jl_safe_printf("EXCEPTION_NONCONTINUABLE_EXCEPTION"); break;
case EXCEPTION_PRIV_INSTRUCTION:
jl_safe_printf("EXCEPTION_PRIV_INSTRUCTION"); break;
case EXCEPTION_SINGLE_STEP:
jl_safe_printf("EXCEPTION_SINGLE_STEP"); break;
case EXCEPTION_STACK_OVERFLOW:
jl_safe_printf("EXCEPTION_STACK_OVERFLOW"); break;
default:
jl_safe_printf("UNKNOWN"); break;
}
jl_safe_printf(" at 0x%Ix -- ", (size_t)ExceptionInfo->ExceptionRecord->ExceptionAddress);
gdblookup((ptrint_t)ExceptionInfo->ExceptionRecord->ExceptionAddress);
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, ExceptionInfo->ContextRecord);
jlbacktrace();
static int recursion = 0;
if (recursion++)
exit(1);
else
jl_exit(1);
}
return EXCEPTION_CONTINUE_SEARCH;
}
static LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *ExceptionInfo)
{
return _exception_handler(ExceptionInfo,1);
}
#if defined(_CPU_X86_64_)
EXCEPTION_DISPOSITION _seh_exception_handler(PEXCEPTION_RECORD ExceptionRecord, void *EstablisherFrame, PCONTEXT ContextRecord, void *DispatcherContext)
{
EXCEPTION_POINTERS ExceptionInfo;
ExceptionInfo.ExceptionRecord = ExceptionRecord;
ExceptionInfo.ContextRecord = ContextRecord;
EXCEPTION_DISPOSITION rval;
switch (_exception_handler(&ExceptionInfo,1)) {
case EXCEPTION_CONTINUE_EXECUTION:
rval = ExceptionContinueExecution; break;
case EXCEPTION_CONTINUE_SEARCH:
rval = ExceptionContinueSearch; break;
#ifndef _MSC_VER
case EXCEPTION_EXECUTE_HANDLER:
rval = ExceptionExecuteHandler; break;
#endif
}
return rval;
}
#endif
#else // #ifdef _OS_WINDOWS_
void restore_signals(void)
{
sigset_t sset;
sigemptyset(&sset);
sigprocmask(SIG_SETMASK, &sset, 0);
}
void sigint_handler(int sig, siginfo_t *info, void *context)
{
if (jl_defer_signal) {
jl_signal_pending = sig;
}
else {
jl_signal_pending = 0;
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset, SIGINT);
sigprocmask(SIG_UNBLOCK, &sset, NULL);
jl_sigint_action();
}
}
#endif
struct uv_shutdown_queue_item { uv_handle_t *h; struct uv_shutdown_queue_item *next; };
struct uv_shutdown_queue { struct uv_shutdown_queue_item *first; struct uv_shutdown_queue_item *last; };
static void jl_uv_exitcleanup_add(uv_handle_t *handle, struct uv_shutdown_queue *queue)
{
struct uv_shutdown_queue_item *item = (struct uv_shutdown_queue_item*)malloc(sizeof(struct uv_shutdown_queue_item));
item->h = handle;
item->next = NULL;
if (queue->last) queue->last->next = item;
if (!queue->first) queue->first = item;
queue->last = item;
}
static void jl_uv_exitcleanup_walk(uv_handle_t *handle, void *arg)
{
if (handle != (uv_handle_t*)JL_STDOUT && handle != (uv_handle_t*)JL_STDERR)
jl_uv_exitcleanup_add(handle, (struct uv_shutdown_queue*)arg);
}
void jl_write_coverage_data(void);
void jl_write_malloc_log(void);
static struct uv_shutdown_queue_item *next_shutdown_queue_item(struct uv_shutdown_queue_item *item)
{
struct uv_shutdown_queue_item *rv = item->next;
free(item);
return rv;
}
DLLEXPORT void jl_atexit_hook()
{
#if defined(JL_GC_MARKSWEEP) && defined(GC_FINAL_STATS)
jl_print_gc_stats(JL_STDERR);
#endif
if (jl_options.code_coverage)
jl_write_coverage_data();
if (jl_options.malloc_log)
jl_write_malloc_log();
if (jl_base_module) {
jl_value_t *f = jl_get_global(jl_base_module, jl_symbol("_atexit"));
if (f!=NULL && jl_is_function(f)) {
JL_TRY {
jl_apply((jl_function_t*)f, NULL, 0);
}
JL_CATCH {
jl_printf(JL_STDERR, "\natexit hook threw an error: ");
jl_static_show(JL_STDERR, jl_exception_in_transit);
}
}
}
jl_gc_run_all_finalizers();
uv_loop_t *loop = jl_global_event_loop();
if (loop == NULL) {
return;
}
struct uv_shutdown_queue queue = {NULL, NULL};
uv_walk(loop, jl_uv_exitcleanup_walk, &queue);
// close stdout and stderr last, since we like being
// able to show stuff (incl. printf's)
if (JL_STDOUT != (void*) STDOUT_FILENO)
jl_uv_exitcleanup_add((uv_handle_t*)JL_STDOUT, &queue);
if (JL_STDERR != (void*) STDERR_FILENO)
jl_uv_exitcleanup_add((uv_handle_t*)JL_STDERR, &queue);
//uv_unref((uv_handle_t*)JL_STDOUT);
//uv_unref((uv_handle_t*)JL_STDERR);
struct uv_shutdown_queue_item *item = queue.first;
while (item) {
JL_TRY {
while (item) {
uv_handle_t *handle = item->h;
if (handle->type != UV_FILE && uv_is_closing(handle)) {
item = next_shutdown_queue_item(item);
continue;
}
switch(handle->type) {
case UV_TTY:
case UV_UDP:
case UV_TCP:
case UV_NAMED_PIPE:
case UV_POLL:
case UV_TIMER:
case UV_ASYNC:
case UV_FS_EVENT:
case UV_FS_POLL:
case UV_IDLE:
case UV_PREPARE:
case UV_CHECK:
case UV_SIGNAL:
case UV_PROCESS:
case UV_FILE:
// These will be shutdown as appropriate by jl_close_uv
jl_close_uv(handle);
break;
case UV_HANDLE:
case UV_STREAM:
case UV_UNKNOWN_HANDLE:
case UV_HANDLE_TYPE_MAX:
case UV_RAW_FD:
case UV_RAW_HANDLE:
default:
assert(0);
}
item = next_shutdown_queue_item(item);
}
}
JL_CATCH {
//error handling -- continue cleanup, as much as possible
uv_unref(item->h);
jl_printf(JL_STDERR, "error during exit cleanup: close: ");
jl_static_show(JL_STDERR, jl_exception_in_transit);
item = next_shutdown_queue_item(item);
}
}
uv_run(loop,UV_RUN_DEFAULT); //let libuv spin until everything has finished closing
}
void jl_get_builtin_hooks(void);
uv_lib_t *jl_dl_handle;
uv_lib_t _jl_RTLD_DEFAULT_handle;
uv_lib_t *jl_RTLD_DEFAULT_handle=&_jl_RTLD_DEFAULT_handle;
#ifdef _OS_WINDOWS_
uv_lib_t _jl_ntdll_handle;
uv_lib_t _jl_exe_handle;
uv_lib_t _jl_kernel32_handle;
uv_lib_t _jl_crtdll_handle;
uv_lib_t _jl_winsock_handle;
uv_lib_t *jl_ntdll_handle=&_jl_ntdll_handle;
uv_lib_t *jl_exe_handle=&_jl_exe_handle;
uv_lib_t *jl_kernel32_handle=&_jl_kernel32_handle;
uv_lib_t *jl_crtdll_handle=&_jl_crtdll_handle;
uv_lib_t *jl_winsock_handle=&_jl_winsock_handle;
#endif
uv_loop_t *jl_io_loop;
void *init_stdio_handle(uv_file fd,int readable)
{
void *handle;
uv_handle_type type = uv_guess_handle(fd);
jl_uv_file_t *file;
#ifndef _OS_WINDOWS_
// Duplicate the file descriptor so we can later dup it over if we want to redirect
// STDIO without having to worry about closing the associated libuv object.
// On windows however, libuv objects remember streams by their HANDLE, so this is
// unnecessary.
fd = dup(fd);
#endif
//jl_printf(JL_STDOUT, "%d: %d -- %d\n", fd, type, 0);
switch(type) {
case UV_TTY:
handle = malloc(sizeof(uv_tty_t));
if (uv_tty_init(jl_io_loop,(uv_tty_t*)handle,fd,readable)) {
jl_errorf("Error initializing stdio in uv_tty_init (%d, %d)\n", fd, type);
}
((uv_tty_t*)handle)->data=0;
uv_tty_set_mode((uv_tty_t*)handle,0); //cooked stdio
break;
case UV_UNKNOWN_HANDLE:
// dup the descriptor with a new one pointing at the bit bucket ...
#if defined(_OS_WINDOWS_)
_dup2(_open("NUL", O_RDWR | O_BINARY, _S_IREAD | _S_IWRITE), fd);
#else
dup2(open("/dev/null", O_RDWR, S_IRUSR | S_IWUSR /* 0600 */ | S_IRGRP | S_IROTH /* 0644 */), fd);
#endif
// ...and continue on as in the UV_FILE case
case UV_FILE:
file = (jl_uv_file_t*)malloc(sizeof(jl_uv_file_t));
file->loop = jl_io_loop;
file->type = UV_FILE;
file->file = fd;
file->data = 0;
handle = file;
break;
case UV_NAMED_PIPE:
handle = malloc(sizeof(uv_pipe_t));
if (uv_pipe_init(jl_io_loop, (uv_pipe_t*)handle, (readable?UV_PIPE_READABLE:UV_PIPE_WRITABLE))) {
jl_errorf("Error initializing stdio in uv_pipe_init (%d, %d)\n", fd, type);
}
if (uv_pipe_open((uv_pipe_t*)handle,fd)) {
jl_errorf("Error initializing stdio in uv_pipe_open (%d, %d)\n", fd, type);
}
((uv_pipe_t*)handle)->data=0;
break;
case UV_TCP:
handle = malloc(sizeof(uv_tcp_t));
if (uv_tcp_init(jl_io_loop, (uv_tcp_t*)handle)) {
jl_errorf("Error initializing stdio in uv_tcp_init (%d, %d)\n", fd, type);
}
if (uv_tcp_open((uv_tcp_t*)handle,fd)) {
jl_errorf("Error initializing stdio in uv_tcp_open (%d, %d)\n", fd, type);
}
((uv_tcp_t*)handle)->data=0;
break;
case UV_UDP:
default:
jl_errorf("This type of handle for stdio is not yet supported (%d, %d)!\n", fd, type);
break;
}
return handle;
}
void init_stdio()
{ //order must be 2,1,0
JL_STDERR = (uv_stream_t*)init_stdio_handle(STDERR_FILENO,0);
JL_STDOUT = (uv_stream_t*)init_stdio_handle(STDOUT_FILENO,0);
JL_STDIN = (uv_stream_t*)init_stdio_handle(STDIN_FILENO,1);
jl_flush_cstdio();
}
#ifdef JL_USE_INTEL_JITEVENTS
char jl_using_intel_jitevents; // Non-zero if running under Intel VTune Amplifier
#endif
#if defined(JL_USE_INTEL_JITEVENTS) && defined(__linux__)
unsigned sig_stack_size = SIGSTKSZ;
#elif defined(_OS_WINDOWS_)
#define sig_stack_size 131072 // 128k
#else
#define sig_stack_size SIGSTKSZ
#endif
#ifndef _OS_WINDOWS_
static void *signal_stack;
#endif
#ifdef _OS_DARWIN_
#include <mach/mach_traps.h>
#include <mach/task.h>
#include <mach/mig_errors.h>
static mach_port_t segv_port = 0;
extern boolean_t exc_server(mach_msg_header_t *, mach_msg_header_t *);
void *mach_segv_listener(void *arg)
{
(void)arg;
while (1) {
int ret = mach_msg_server(exc_server,2048,segv_port,MACH_MSG_TIMEOUT_NONE);
jl_safe_printf("mach_msg_server: %s\n", mach_error_string(ret));
jl_exit(1);
}
}
#ifdef SEGV_EXCEPTION
void darwin_segv_handler(unw_context_t *uc)
{
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, uc);
jl_exception_in_transit = jl_segv_exception;
jl_rethrow();
}
#endif
void darwin_stack_overflow_handler(unw_context_t *uc)
{
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, uc);
jl_exception_in_transit = jl_stackovf_exception;
jl_rethrow();
}
void darwin_accerr_handler(unw_context_t *uc)
{
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, uc);
jl_exception_in_transit = jl_readonlymemory_exception;
jl_rethrow();
}
#define HANDLE_MACH_ERROR(msg, retval) \
if (retval!=KERN_SUCCESS) { mach_error(msg ":", (retval)); jl_exit(1); }
#ifdef LIBOSXUNWIND
extern kern_return_t profiler_segv_handler(mach_port_t,mach_port_t,mach_port_t,exception_type_t,exception_data_t,mach_msg_type_number_t);
extern volatile mach_port_t mach_profiler_thread;
#endif
enum x86_trap_flags {
USER_MODE = 0x4,
WRITE_FAULT = 0x2,
PAGE_PRESENT = 0x1
};
//exc_server uses dlsym to find symbol
DLLEXPORT
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)
{
unsigned int count = MACHINE_THREAD_STATE_COUNT;
unsigned int exc_count = X86_EXCEPTION_STATE64_COUNT;
x86_thread_state64_t state, old_state;
x86_exception_state64_t exc_state;
kern_return_t ret;
//memset(&state,0,sizeof(x86_thread_state64_t));
//memset(&exc_state,0,sizeof(x86_exception_state64_t));
#ifdef LIBOSXUNWIND
if (thread == mach_profiler_thread) {
return profiler_segv_handler(exception_port,thread,task,exception,code,code_count);
}
#endif
ret = thread_get_state(thread,x86_EXCEPTION_STATE64,(thread_state_t)&exc_state,&exc_count);
HANDLE_MACH_ERROR("thread_get_state(1)",ret);
uint64_t fault_addr = exc_state.__faultvaddr;
#ifdef SEGV_EXCEPTION
if (1) {
#else
if (is_addr_on_stack((void*)fault_addr) ||
((exc_state.__err & PAGE_PRESENT) == PAGE_PRESENT)) {
#endif
ret = thread_get_state(thread,x86_THREAD_STATE64,(thread_state_t)&state,&count);
HANDLE_MACH_ERROR("thread_get_state(2)",ret);
old_state = state;
// memset(&state,0,sizeof(x86_thread_state64_t));
// Setup libunwind information
state.__rsp = (uint64_t)signal_stack + sig_stack_size;
state.__rsp -= sizeof(unw_context_t);
state.__rsp &= -16;
unw_context_t *uc = (unw_context_t*)state.__rsp;
state.__rsp -= 512;
// This is for alignment. In particular note that the sizeof(void*) is necessary
// since it would usually specify the return address (i.e., we are aligning the call
// frame to a 16 byte boundary as required by the abi, but the stack pointer
// to point to the byte beyond that. Not doing this leads to funny behavior on
// the first access to an external function will fail due to stack misalignment
state.__rsp &= -16;
state.__rsp -= sizeof(void*);
memset(uc,0,sizeof(unw_context_t));
memcpy(uc,&old_state,sizeof(x86_thread_state64_t));
state.__rdi = (uint64_t)uc;
if ((exc_state.__err & PAGE_PRESENT) == PAGE_PRESENT)
state.__rip = (uint64_t)darwin_accerr_handler;
#ifdef SEGV_EXCEPTION
else if (!is_addr_on_stack((void*)fault_addr))
state.__rip = (uint64_t)darwin_segv_handler;
#endif
else
state.__rip = (uint64_t)darwin_stack_overflow_handler;
state.__rbp = state.__rsp;
ret = thread_set_state(thread,x86_THREAD_STATE64,(thread_state_t)&state,count);
HANDLE_MACH_ERROR("thread_set_state",ret);
return KERN_SUCCESS;
}
else {
ret = thread_get_state(thread,x86_THREAD_STATE64,(thread_state_t)&state,&count);
HANDLE_MACH_ERROR("thread_get_state(3)",ret);
jl_safe_printf("\nsignal (%d): %s\n", SIGSEGV, strsignal(SIGSEGV));
bt_size = rec_backtrace_ctx(bt_data, MAX_BT_SIZE, (unw_context_t*)&state);
jlbacktrace();
return KERN_INVALID_ARGUMENT;
}
}
#endif
int isabspath(const char *in)
{
#ifdef _OS_WINDOWS_
char c0 = in[0];
if (c0 == '/' || c0 == '\\') {
return 1; // absolute path relative to %CD% (current drive), or UNC
}
else {
int s = strlen(in);
if (s > 2) {
char c1 = in[1];
char c2 = in[2];
if (c1 == ':' && (c2 == '/' || c2 == '\\')) return 1; // absolute path
}
}
#else
if (in[0] == '/') return 1; // absolute path
#endif
return 0; // relative path
}
static char *abspath(const char *in)
{ // compute an absolute path location, so that chdir doesn't change the file reference
#ifndef _OS_WINDOWS_
char *out = realpath(in, NULL);
if (!out) {
if (in[0] == PATHSEPSTRING[0]) {
out = strdup(in);
}
else {
size_t path_size = PATH_MAX;
size_t len = strlen(in);
char *path = (char*)malloc(PATH_MAX);
if (uv_cwd(path, &path_size)) {
jl_error("fatal error: unexpected error while retrieving current working directory\n");
}
if (path_size + len + 1 >= PATH_MAX) {
jl_error("fatal error: current working directory path too long\n");
}
path[path_size-1] = PATHSEPSTRING[0];
memcpy(path+path_size, in, len+1);
out = strdup(path);
free(path);
}
}
#else
DWORD n = GetFullPathName(in, 0, NULL, NULL);
if (n <= 0) {
jl_error("fatal error: jl_compileropts.image_file path too long or GetFullPathName failed\n");
}
char *out = (char*)malloc(n);
DWORD m = GetFullPathName(in, n, out, NULL);
if (n != m + 1) {
jl_error("fatal error: jl_compileropts.image_file path too long or GetFullPathName failed\n");
}
#endif
return out;
}
static void jl_resolve_sysimg_location(JL_IMAGE_SEARCH rel)
{ // this function resolves the paths in jl_options to absolute file locations as needed
// and it replaces the pointers to `julia_home`, `julia_bin`, `image_file`, and `build_path`
// it may fail, print an error, and exit(1) if any of these paths are longer than PATH_MAX
//
// note: if you care about lost memory, you should call the appropriate `free()` function
// on the original pointer for each `char*` you've inserted into `jl_options`, after
// calling `julia_init()`
char *free_path = (char*)malloc(PATH_MAX);
size_t path_size = PATH_MAX;
if (uv_exepath(free_path, &path_size)) {
jl_error("fatal error: unexpected error while retrieving exepath\n");
}
if (path_size >= PATH_MAX) {
jl_error("fatal error: jl_compileropts.julia_bin path too long\n");
}
jl_options.julia_bin = strdup(free_path);
if (!jl_options.julia_home) {
jl_options.julia_home = getenv("JULIA_HOME");
if (!jl_options.julia_home) {
jl_options.julia_home = dirname(free_path);
}
}
if (jl_options.julia_home)
jl_options.julia_home = abspath(jl_options.julia_home);
free(free_path);
free_path = NULL;
if (jl_options.image_file) {
if (rel == JL_IMAGE_JULIA_HOME && !isabspath(jl_options.image_file)) {
// build time path, relative to JULIA_HOME
free_path = (char*)malloc(PATH_MAX);
int n = snprintf(free_path, PATH_MAX, "%s" PATHSEPSTRING "%s",
jl_options.julia_home, jl_options.image_file);
if (n >= PATH_MAX || n < 0) {
jl_error("fatal error: jl_compileropts.image_file path too long\n");
}
jl_options.image_file = free_path;
}
if (jl_options.image_file)
jl_options.image_file = abspath(jl_options.image_file);
if (free_path) {
free(free_path);
free_path = NULL;
}
}
if (jl_options.build_path)
jl_options.build_path = abspath(jl_options.build_path);
if (jl_options.machinefile)
jl_options.machinefile = abspath(jl_options.machinefile);
if (jl_options.load)
jl_options.load = abspath(jl_options.load);
}
#ifdef _OS_DARWIN_
void attach_exception_port()
{
kern_return_t ret;
ret = thread_set_exception_ports(mach_thread_self(),EXC_MASK_BAD_ACCESS,segv_port,EXCEPTION_DEFAULT,MACHINE_THREAD_STATE);
HANDLE_MACH_ERROR("thread_set_exception_ports",ret);
}
#endif
void _julia_init(JL_IMAGE_SEARCH rel)