/
aot-compiler.c
14665 lines (12501 loc) · 439 KB
/
aot-compiler.c
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/**
* \file
* mono Ahead of Time compiler
*
* Author:
* Dietmar Maurer (dietmar@ximian.com)
* Zoltan Varga (vargaz@gmail.com)
* Johan Lorensson (lateralusx.github@gmail.com)
*
* (C) 2002 Ximian, Inc.
* Copyright 2003-2011 Novell, Inc
* Copyright 2011 Xamarin Inc (http://www.xamarin.com)
* Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include "config.h"
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#ifndef HOST_WIN32
#include <sys/time.h>
#else
#include <winsock2.h>
#include <windows.h>
#endif
#include <errno.h>
#include <sys/stat.h>
#include <mono/metadata/abi-details.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/class.h>
#include <mono/metadata/object.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/assembly-internals.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/reflection-internals.h>
#include <mono/metadata/marshal.h>
#include <mono/metadata/gc-internals.h>
#include <mono/metadata/mempool-internals.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/custom-attrs-internals.h>
#include <mono/utils/mono-logger-internals.h>
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-time.h>
#include <mono/utils/mono-mmap.h>
#include <mono/utils/mono-rand.h>
#include <mono/utils/json.h>
#include <mono/utils/mono-threads-coop.h>
#include <mono/profiler/aot.h>
#include <mono/utils/w32api.h>
#include "aot-compiler.h"
#include "aot-runtime.h"
#include "seq-points.h"
#include "image-writer.h"
#include "dwarfwriter.h"
#include "mini-gc.h"
#include "mini-llvm.h"
#include "mini-runtime.h"
#include "interp/interp.h"
static MonoMethod*
try_get_method_nofail (MonoClass *klass, const char *method_name, int param_count, int flags)
{
MonoMethod *result;
ERROR_DECL (error);
result = mono_class_get_method_from_name_checked (klass, method_name, param_count, flags, error);
mono_error_assert_ok (error);
return result;
}
// FIXME Consolidate the multiple functions named get_method_nofail.
static MonoMethod*
get_method_nofail (MonoClass *klass, const char *method_name, int param_count, int flags)
{
MonoMethod *result = try_get_method_nofail (klass, method_name, param_count, flags);
g_assertf (result, "Expected to find method %s in klass %s", method_name, m_class_get_name (klass));
return result;
}
#if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
// Use MSVC toolchain, Clang for MSVC using MSVC codegen and linker, when compiling for AMD64
// targeting WIN32 platforms running AOT compiler on WIN32 platform with VS installation.
#if defined(TARGET_AMD64) && defined(TARGET_WIN32) && defined(HOST_WIN32) && defined(_MSC_VER)
#define TARGET_X86_64_WIN32_MSVC
#endif
#if defined(TARGET_X86_64_WIN32_MSVC)
#define TARGET_WIN32_MSVC
#endif
// Emit native unwind info on Windows platforms (different from DWARF). Emitted unwind info
// works when using the MSVC toolchain using Clang for MSVC codegen and linker. Only supported when
// compiling for AMD64 (Windows x64 platforms).
#if defined(TARGET_WIN32_MSVC) && defined(MONO_ARCH_HAVE_UNWIND_TABLE)
#define EMIT_WIN32_UNWIND_INFO
#endif
#if defined(TARGET_ANDROID) || defined(__linux__)
#define RODATA_REL_SECT ".data.rel.ro"
#else
#define RODATA_REL_SECT ".text"
#endif
#if defined(__linux__)
#define RODATA_SECT ".rodata"
#elif defined(TARGET_MACH)
#define RODATA_SECT ".section __TEXT, __const"
#elif defined(TARGET_WIN32_MSVC)
#define RODATA_SECT ".rdata"
#else
#define RODATA_SECT ".text"
#endif
#define TV_DECLARE(name) gint64 name
#define TV_GETTIME(tv) tv = mono_100ns_ticks ()
#define TV_ELAPSED(start,end) (((end) - (start)) / 10)
#define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
typedef struct {
char *name;
MonoImage *image;
} ImageProfileData;
typedef struct ClassProfileData ClassProfileData;
typedef struct {
int argc;
ClassProfileData **argv;
MonoGenericInst *inst;
} GInstProfileData;
struct ClassProfileData {
ImageProfileData *image;
char *ns, *name;
GInstProfileData *inst;
MonoClass *klass;
};
typedef struct {
ClassProfileData *klass;
int id;
char *name;
int param_count;
char *signature;
GInstProfileData *inst;
MonoMethod *method;
} MethodProfileData;
typedef struct {
GHashTable *images, *classes, *ginsts, *methods;
} ProfileData;
/* predefined values for static readonly fields without needed to run the .cctor */
typedef struct _ReadOnlyValue ReadOnlyValue;
struct _ReadOnlyValue {
ReadOnlyValue *next;
char *name;
int type; /* to be used later for typechecking to prevent user errors */
union {
guint8 i1;
guint16 i2;
guint32 i4;
guint64 i8;
gpointer ptr;
} value;
};
static ReadOnlyValue *readonly_values;
typedef struct MonoAotOptions {
char *outfile;
char *llvm_outfile;
char *data_outfile;
GList *profile_files;
gboolean save_temps;
gboolean write_symbols;
gboolean metadata_only;
gboolean bind_to_runtime_version;
MonoAotMode mode;
gboolean interp;
gboolean no_dlsym;
gboolean static_link;
gboolean asm_only;
gboolean asm_writer;
gboolean nodebug;
gboolean dwarf_debug;
gboolean soft_debug;
gboolean log_generics;
gboolean log_instances;
gboolean gen_msym_dir;
char *gen_msym_dir_path;
gboolean direct_pinvoke;
gboolean direct_icalls;
gboolean direct_extern_calls;
gboolean no_direct_calls;
gboolean use_trampolines_page;
gboolean no_instances;
// We are collecting inflated methods and emitting non-inflated
gboolean dedup;
// The name of the assembly for which the AOT module is going to have all deduped methods moved to.
// When set, we are emitting inflated methods only
char *dedup_include;
gboolean gnu_asm;
gboolean try_llvm;
gboolean llvm;
gboolean llvm_only;
int nthreads;
int ntrampolines;
int nrgctx_trampolines;
int nimt_trampolines;
int ngsharedvt_arg_trampolines;
int nftnptr_arg_trampolines;
int nrgctx_fetch_trampolines;
int nunbox_arbitrary_trampolines;
gboolean print_skipped_methods;
gboolean stats;
gboolean verbose;
gboolean deterministic;
gboolean allow_errors;
char *tool_prefix;
char *ld_flags;
char *ld_name;
char *mtriple;
char *llvm_path;
char *temp_path;
char *instances_logfile_path;
char *logfile;
char *llvm_opts;
char *llvm_llc;
char *llvm_cpu_attr;
gboolean use_current_cpu;
gboolean dump_json;
gboolean profile_only;
gboolean no_opt;
char *clangxx;
char *depfile;
} MonoAotOptions;
typedef enum {
METHOD_CAT_NORMAL,
METHOD_CAT_GSHAREDVT,
METHOD_CAT_INST,
METHOD_CAT_WRAPPER,
METHOD_CAT_NUM
} MethodCategory;
typedef struct MonoAotStats {
int ccount, mcount, lmfcount, abscount, gcount, ocount, genericcount;
gint64 code_size, method_info_size, ex_info_size, unwind_info_size, got_size, class_info_size, got_info_size, plt_size, blob_size;
int methods_without_got_slots, direct_calls, all_calls, llvm_count;
int got_slots, offsets_size;
int method_categories [METHOD_CAT_NUM];
int got_slot_types [MONO_PATCH_INFO_NUM];
int got_slot_info_sizes [MONO_PATCH_INFO_NUM];
int jit_time, gen_time, link_time;
int method_ref_count, method_ref_size;
int class_ref_count, class_ref_size;
int ginst_count, ginst_size;
} MonoAotStats;
typedef struct GotInfo {
GHashTable *patch_to_got_offset;
GHashTable **patch_to_got_offset_by_type;
GPtrArray *got_patches;
} GotInfo;
#ifdef EMIT_WIN32_UNWIND_INFO
typedef struct _UnwindInfoSectionCacheItem {
char *xdata_section_label;
PUNWIND_INFO unwind_info;
gboolean xdata_section_emitted;
} UnwindInfoSectionCacheItem;
#endif
typedef struct MonoAotCompile {
MonoImage *image;
GPtrArray *methods;
GHashTable *method_indexes;
GHashTable *method_depth;
MonoCompile **cfgs;
int cfgs_size;
GHashTable **patch_to_plt_entry;
GHashTable *plt_offset_to_entry;
//GHashTable *patch_to_got_offset;
//GHashTable **patch_to_got_offset_by_type;
//GPtrArray *got_patches;
GotInfo got_info, llvm_got_info;
GHashTable *image_hash;
GHashTable *method_to_cfg;
GHashTable *token_info_hash;
GHashTable *method_to_pinvoke_import;
GHashTable *method_to_external_icall_symbol_name;
GPtrArray *extra_methods;
GPtrArray *image_table;
GPtrArray *globals;
GPtrArray *method_order;
GHashTable *dedup_stats;
GHashTable *dedup_cache;
gboolean dedup_cache_changed;
GHashTable *export_names;
/* Maps MonoClass* -> blob offset */
GHashTable *klass_blob_hash;
/* Maps MonoMethod* -> blob offset */
GHashTable *method_blob_hash;
/* Maps MonoGenericInst* -> blob offset */
GHashTable *ginst_blob_hash;
GHashTable *gsharedvt_in_signatures;
GHashTable *gsharedvt_out_signatures;
guint32 *plt_got_info_offsets;
guint32 got_offset, llvm_got_offset, plt_offset, plt_got_offset_base, plt_got_info_offset_base, nshared_got_entries;
/* Number of GOT entries reserved for trampolines */
guint32 num_trampoline_got_entries;
guint32 tramp_page_size;
guint32 table_offsets [MONO_AOT_TABLE_NUM];
guint32 num_trampolines [MONO_AOT_TRAMP_NUM];
guint32 trampoline_got_offset_base [MONO_AOT_TRAMP_NUM];
guint32 trampoline_size [MONO_AOT_TRAMP_NUM];
guint32 tramp_page_code_offsets [MONO_AOT_TRAMP_NUM];
MonoAotOptions aot_opts;
guint32 nmethods;
int call_table_entry_size;
guint32 nextra_methods;
guint32 jit_opts;
guint32 simd_opts;
MonoMemPool *mempool;
MonoAotStats stats;
int method_index;
char *static_linking_symbol;
mono_mutex_t mutex;
gboolean gas_line_numbers;
/* Whenever to emit an object file directly from llc */
gboolean llvm_owriter;
gboolean llvm_owriter_supported;
MonoImageWriter *w;
MonoDwarfWriter *dwarf;
FILE *fp;
char *tmpbasename;
char *tmpfname;
char *temp_dir_to_delete;
char *llvm_sfile;
char *llvm_ofile;
GSList *cie_program;
GHashTable *unwind_info_offsets;
GPtrArray *unwind_ops;
guint32 unwind_info_offset;
char *global_prefix;
char *got_symbol;
char *llvm_got_symbol;
char *plt_symbol;
char *llvm_eh_frame_symbol;
GHashTable *method_label_hash;
const char *temp_prefix;
const char *user_symbol_prefix;
const char *llvm_label_prefix;
const char *inst_directive;
int align_pad_value;
guint32 label_generator;
gboolean llvm;
gboolean has_jitted_code;
gboolean is_full_aot;
gboolean dedup_collect_only;
MonoAotFileFlags flags;
MonoDynamicStream blob;
gboolean blob_closed;
GHashTable *typespec_classes;
GString *llc_args;
GString *as_args;
char *assembly_name_sym;
GHashTable *plt_entry_debug_sym_cache;
gboolean thumb_mixed, need_no_dead_strip, need_pt_gnu_stack;
GHashTable *ginst_hash;
GHashTable *dwarf_ln_filenames;
gboolean global_symbols;
int objc_selector_index, objc_selector_index_2;
GPtrArray *objc_selectors;
GHashTable *objc_selector_to_index;
GList *profile_data;
GHashTable *profile_methods;
GHashTable *blob_hash;
#ifdef EMIT_WIN32_UNWIND_INFO
GList *unwind_info_section_cache;
#endif
FILE *logfile;
FILE *instances_logfile;
FILE *data_outfile;
int datafile_offset;
int gc_name_offset;
// In this mode, we are emitting dedupable methods that we encounter
gboolean dedup_emit_mode;
} MonoAotCompile;
typedef struct {
int plt_offset;
char *symbol, *llvm_symbol, *debug_sym;
MonoJumpInfo *ji;
gboolean jit_used, llvm_used;
} MonoPltEntry;
#define mono_acfg_lock(acfg) mono_os_mutex_lock (&((acfg)->mutex))
#define mono_acfg_unlock(acfg) mono_os_mutex_unlock (&((acfg)->mutex))
/* This points to the current acfg in LLVM mode */
static MonoAotCompile *llvm_acfg;
static MonoAotCompile *current_acfg;
/* Cache of decoded method external icall symbol names. */
/* Owned by acfg, but kept in this static as well since it is */
/* accessed by code paths not having access to acfg. */
static GHashTable *method_to_external_icall_symbol_name;
// This, instead of an array of pointers, to optimize away a pointer and a relocation per string.
#define MSGSTRFIELD(line) MSGSTRFIELD1(line)
#define MSGSTRFIELD1(line) str##line
static const struct msgstr_t {
#define PATCH_INFO(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
#include "patch-info.h"
#undef PATCH_INFO
} opstr = {
#define PATCH_INFO(a,b) b,
#include "patch-info.h"
#undef PATCH_INFO
};
static const gint16 opidx [] = {
#define PATCH_INFO(a,b) offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
#include "patch-info.h"
#undef PATCH_INFO
};
static G_GNUC_UNUSED const char*
get_patch_name (int info)
{
return (const char*)&opstr + opidx [info];
}
static int
emit_aot_image (MonoAotCompile *acfg);
static void
mono_flush_method_cache (MonoAotCompile *acfg);
static void
mono_read_method_cache (MonoAotCompile *acfg);
static guint32
get_unwind_info_offset (MonoAotCompile *acfg, guint8 *encoded, guint32 encoded_len);
static char*
get_plt_entry_debug_sym (MonoAotCompile *acfg, MonoJumpInfo *ji, GHashTable *cache);
static void
add_gsharedvt_wrappers (MonoAotCompile *acfg, MonoMethodSignature *sig, gboolean gsharedvt_in, gboolean gsharedvt_out, gboolean interp_in);
static void
add_profile_instances (MonoAotCompile *acfg, ProfileData *data);
static void
encode_signature (MonoAotCompile *acfg, MonoMethodSignature *sig, guint8 *buf, guint8 **endbuf);
static gboolean
ignore_cfg (MonoCompile *cfg)
{
return !cfg || cfg->skip;
}
static void
aot_printf (MonoAotCompile *acfg, const gchar *format, ...)
{
FILE *output;
va_list args;
if (acfg->logfile)
output = acfg->logfile;
else
output = stdout;
va_start (args, format);
vfprintf (output, format, args);
va_end (args);
}
static void
aot_printerrf (MonoAotCompile *acfg, const gchar *format, ...)
{
FILE *output;
va_list args;
if (acfg->logfile)
output = acfg->logfile;
else
output = stderr;
va_start (args, format);
vfprintf (output, format, args);
va_end (args);
}
static void
report_loader_error (MonoAotCompile *acfg, MonoError *error, gboolean fatal, const char *format, ...)
{
FILE *output;
va_list args;
if (is_ok (error))
return;
if (acfg->logfile)
output = acfg->logfile;
else
output = stderr;
va_start (args, format);
vfprintf (output, format, args);
va_end (args);
mono_error_cleanup (error);
if (acfg->is_full_aot && !acfg->aot_opts.allow_errors && fatal) {
fprintf (output, "FullAOT cannot continue if there are loader errors.\n");
exit (1);
}
}
/* Wrappers around the image writer functions */
#define MAX_SYMBOL_SIZE 256
#if defined(TARGET_WIN32) && defined(TARGET_X86)
static const char *
mangle_symbol (const char * symbol, char * mangled_symbol, gsize length)
{
gsize needed_size = length;
g_assert (NULL != symbol);
g_assert (NULL != mangled_symbol);
g_assert (0 != length);
if (symbol && '_' != symbol [0]) {
needed_size = g_snprintf (mangled_symbol, length, "_%s", symbol);
} else {
needed_size = g_snprintf (mangled_symbol, length, "%s", symbol);
}
g_assert (0 <= needed_size && needed_size < length);
return mangled_symbol;
}
static char *
mangle_symbol_alloc (const char * symbol)
{
g_assert (NULL != symbol);
if (symbol && '_' != symbol [0]) {
return g_strdup_printf ("_%s", symbol);
}
else {
return g_strdup_printf ("%s", symbol);
}
}
#endif
static void
emit_section_change (MonoAotCompile *acfg, const char *section_name, int subsection_index)
{
mono_img_writer_emit_section_change (acfg->w, section_name, subsection_index);
}
#if defined(TARGET_WIN32) && defined(TARGET_X86)
static void
emit_local_symbol (MonoAotCompile *acfg, const char *name, const char *end_label, gboolean func)
{
const char * mangled_symbol_name = name;
char * mangled_symbol_name_alloc = NULL;
if (TRUE == func) {
mangled_symbol_name_alloc = mangle_symbol_alloc (name);
mangled_symbol_name = mangled_symbol_name_alloc;
}
if (name != mangled_symbol_name && 0 != g_strcasecmp (name, mangled_symbol_name)) {
mono_img_writer_emit_label (acfg->w, mangled_symbol_name);
}
mono_img_writer_emit_local_symbol (acfg->w, mangled_symbol_name, end_label, func);
if (NULL != mangled_symbol_name_alloc) {
g_free (mangled_symbol_name_alloc);
}
}
#else
static void
emit_local_symbol (MonoAotCompile *acfg, const char *name, const char *end_label, gboolean func)
{
mono_img_writer_emit_local_symbol (acfg->w, name, end_label, func);
}
#endif
static void
emit_label (MonoAotCompile *acfg, const char *name)
{
mono_img_writer_emit_label (acfg->w, name);
}
static void
emit_bytes (MonoAotCompile *acfg, const guint8* buf, int size)
{
mono_img_writer_emit_bytes (acfg->w, buf, size);
}
static void
emit_string (MonoAotCompile *acfg, const char *value)
{
mono_img_writer_emit_string (acfg->w, value);
}
static void
emit_line (MonoAotCompile *acfg)
{
mono_img_writer_emit_line (acfg->w);
}
static void
emit_alignment (MonoAotCompile *acfg, int size)
{
mono_img_writer_emit_alignment (acfg->w, size);
}
static void
emit_alignment_code (MonoAotCompile *acfg, int size)
{
if (acfg->align_pad_value)
mono_img_writer_emit_alignment_fill (acfg->w, size, acfg->align_pad_value);
else
mono_img_writer_emit_alignment (acfg->w, size);
}
static void
emit_padding (MonoAotCompile *acfg, int size)
{
int i;
guint8 buf [16];
if (acfg->align_pad_value) {
for (i = 0; i < 16; ++i)
buf [i] = acfg->align_pad_value;
} else {
memset (buf, 0, sizeof (buf));
}
for (i = 0; i < size; i += 16) {
if (size - i < 16)
emit_bytes (acfg, buf, size - i);
else
emit_bytes (acfg, buf, 16);
}
}
static void
emit_pointer (MonoAotCompile *acfg, const char *target)
{
mono_img_writer_emit_pointer (acfg->w, target);
}
static void
emit_pointer_2 (MonoAotCompile *acfg, const char *prefix, const char *target)
{
if (prefix [0] != '\0') {
char *s = g_strdup_printf ("%s%s", prefix, target);
mono_img_writer_emit_pointer (acfg->w, s);
g_free (s);
} else {
mono_img_writer_emit_pointer (acfg->w, target);
}
}
static void
emit_int16 (MonoAotCompile *acfg, int value)
{
mono_img_writer_emit_int16 (acfg->w, value);
}
static void
emit_int32 (MonoAotCompile *acfg, int value)
{
mono_img_writer_emit_int32 (acfg->w, value);
}
static void
emit_symbol_diff (MonoAotCompile *acfg, const char *end, const char* start, int offset)
{
mono_img_writer_emit_symbol_diff (acfg->w, end, start, offset);
}
static void
emit_zero_bytes (MonoAotCompile *acfg, int num)
{
mono_img_writer_emit_zero_bytes (acfg->w, num);
}
static void
emit_byte (MonoAotCompile *acfg, guint8 val)
{
mono_img_writer_emit_byte (acfg->w, val);
}
#if defined(TARGET_WIN32) && defined(TARGET_X86)
static G_GNUC_UNUSED void
emit_global_inner (MonoAotCompile *acfg, const char *name, gboolean func)
{
const char * mangled_symbol_name = name;
char * mangled_symbol_name_alloc = NULL;
mangled_symbol_name_alloc = mangle_symbol_alloc (name);
mangled_symbol_name = mangled_symbol_name_alloc;
if (0 != g_strcasecmp (name, mangled_symbol_name)) {
mono_img_writer_emit_label (acfg->w, mangled_symbol_name);
}
mono_img_writer_emit_global (acfg->w, mangled_symbol_name, func);
if (NULL != mangled_symbol_name_alloc) {
g_free (mangled_symbol_name_alloc);
}
}
#else
static G_GNUC_UNUSED void
emit_global_inner (MonoAotCompile *acfg, const char *name, gboolean func)
{
mono_img_writer_emit_global (acfg->w, name, func);
}
#endif
#ifdef TARGET_WIN32_MSVC
static gboolean
link_shared_library (MonoAotCompile *acfg)
{
return !acfg->aot_opts.static_link && !acfg->aot_opts.asm_only;
}
#endif
static gboolean
add_to_global_symbol_table (MonoAotCompile *acfg)
{
#ifdef TARGET_WIN32_MSVC
return acfg->aot_opts.no_dlsym || link_shared_library (acfg);
#else
return acfg->aot_opts.no_dlsym;
#endif
}
static void
emit_global (MonoAotCompile *acfg, const char *name, gboolean func)
{
if (add_to_global_symbol_table (acfg))
g_ptr_array_add (acfg->globals, g_strdup (name));
if (acfg->aot_opts.no_dlsym) {
mono_img_writer_emit_local_symbol (acfg->w, name, NULL, func);
} else {
emit_global_inner (acfg, name, func);
}
}
static void
emit_symbol_size (MonoAotCompile *acfg, const char *name, const char *end_label)
{
mono_img_writer_emit_symbol_size (acfg->w, name, end_label);
}
/* Emit a symbol which is referenced by the MonoAotFileInfo structure */
static void
emit_info_symbol (MonoAotCompile *acfg, const char *name, gboolean func)
{
char symbol [MAX_SYMBOL_SIZE];
if (acfg->llvm) {
emit_label (acfg, name);
/* LLVM generated code references this */
int n = snprintf (symbol, MAX_SYMBOL_SIZE, "%s%s%s", acfg->user_symbol_prefix, acfg->global_prefix, name);
if (n >= MAX_SYMBOL_SIZE)
symbol[MAX_SYMBOL_SIZE - 1] = 0;
emit_label (acfg, symbol);
#ifndef TARGET_WIN32_MSVC
emit_global_inner (acfg, symbol, FALSE);
#else
emit_global_inner (acfg, symbol, func);
#endif
} else {
emit_label (acfg, name);
}
}
static void
emit_string_symbol (MonoAotCompile *acfg, const char *name, const char *value)
{
if (acfg->llvm) {
mono_llvm_emit_aot_data (name, (guint8*)value, (int)strlen (value) + 1);
return;
}
mono_img_writer_emit_section_change (acfg->w, RODATA_SECT, 1);
#ifdef TARGET_MACH
/* On apple, all symbols need to be aligned to avoid warnings from ld */
emit_alignment (acfg, 4);
#endif
mono_img_writer_emit_label (acfg->w, name);
mono_img_writer_emit_string (acfg->w, value);
}
static G_GNUC_UNUSED void
emit_uleb128 (MonoAotCompile *acfg, guint32 value)
{
do {
guint8 b = value & 0x7f;
value >>= 7;
if (value != 0) /* more bytes to come */
b |= 0x80;
emit_byte (acfg, b);
} while (value);
}
static G_GNUC_UNUSED void
emit_sleb128 (MonoAotCompile *acfg, gint64 value)
{
gboolean more = 1;
gboolean negative = (value < 0);
guint32 size = 64;
guint8 byte;
while (more) {
byte = value & 0x7f;
value >>= 7;
/* the following is unnecessary if the
* implementation of >>= uses an arithmetic rather
* than logical shift for a signed left operand
*/
if (negative)
/* sign extend */
value |= - ((gint64)1 <<(size - 7));
/* sign bit of byte is second high order bit (0x40) */
if ((value == 0 && !(byte & 0x40)) ||
(value == -1 && (byte & 0x40)))
more = 0;
else
byte |= 0x80;
emit_byte (acfg, byte);
}
}
static G_GNUC_UNUSED void
encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
{
guint8 *p = buf;
do {
guint8 b = value & 0x7f;
value >>= 7;
if (value != 0) /* more bytes to come */
b |= 0x80;
*p ++ = b;
} while (value);
*endbuf = p;
}
static G_GNUC_UNUSED void
encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
{
gboolean more = 1;
gboolean negative = (value < 0);
guint32 size = 32;
guint8 byte;
guint8 *p = buf;
while (more) {
byte = value & 0x7f;
value >>= 7;
/* the following is unnecessary if the
* implementation of >>= uses an arithmetic rather
* than logical shift for a signed left operand
*/
if (negative)
/* sign extend */
value |= - (1 <<(size - 7));
/* sign bit of byte is second high order bit (0x40) */
if ((value == 0 && !(byte & 0x40)) ||
(value == -1 && (byte & 0x40)))
more = 0;
else
byte |= 0x80;
*p ++= byte;
}
*endbuf = p;
}
static void
encode_int (gint32 val, guint8 *buf, guint8 **endbuf)
{
// FIXME: Big-endian
buf [0] = (val >> 0) & 0xff;
buf [1] = (val >> 8) & 0xff;
buf [2] = (val >> 16) & 0xff;
buf [3] = (val >> 24) & 0xff;
*endbuf = buf + 4;
}
static void
encode_int16 (guint16 val, guint8 *buf, guint8 **endbuf)
{
buf [0] = (val >> 0) & 0xff;
buf [1] = (val >> 8) & 0xff;
*endbuf = buf + 2;
}
static void
encode_string (const char *s, guint8 *buf, guint8 **endbuf)
{
size_t len = strlen (s);
memcpy (buf, s, len + 1);
*endbuf = buf + len + 1;
}
static void
emit_unset_mode (MonoAotCompile *acfg)
{
mono_img_writer_emit_unset_mode (acfg->w);
}
static G_GNUC_UNUSED void
emit_set_thumb_mode (MonoAotCompile *acfg)
{
emit_unset_mode (acfg);
fprintf (acfg->fp, ".code 16\n");
}
static G_GNUC_UNUSED void
emit_set_arm_mode (MonoAotCompile *acfg)
{
emit_unset_mode (acfg);
fprintf (acfg->fp, ".code 32\n");
}
static void
emit_code_bytes (MonoAotCompile *acfg, const guint8* buf, int size)
{
#ifdef TARGET_ARM64
int i;
g_assert (size % 4 == 0);
emit_unset_mode (acfg);
for (i = 0; i < size; i += 4)
fprintf (acfg->fp, "%s 0x%x\n", acfg->inst_directive, *(guint32*)(buf + i));
#else
emit_bytes (acfg, buf, size);
#endif
}
/* ARCHITECTURE SPECIFIC CODE */
#if defined(TARGET_X86) || defined(TARGET_AMD64) || defined(TARGET_ARM) || defined(TARGET_POWERPC) || defined(TARGET_ARM64) || defined (TARGET_RISCV)
#define EMIT_DWARF_INFO 1
#endif
#ifdef TARGET_WIN32_MSVC
#undef EMIT_DWARF_INFO
#define EMIT_WIN32_CODEVIEW_INFO
#endif
#ifdef EMIT_WIN32_UNWIND_INFO
static UnwindInfoSectionCacheItem *
get_cached_unwind_info_section_item_win32 (MonoAotCompile *acfg, const char *function_start, const char *function_end, GSList *unwind_ops);
static void
free_unwind_info_section_cache_win32 (MonoAotCompile *acfg);