Adds most of the toolsHEADmaster

1 files changed, 304 insertions, 0 deletions

diff --git a/v_windows/v/old/vlib/builtin/builtin_windows.c.v b/v_windows/v/old/vlib/builtin/builtin_windows.c.v
new file mode 100644
index 0000000..97592cf
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/builtin_windows.c.v
@@ -0,0 +1,304 @@
+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module builtin
+
+// dbghelp.h is already included in cheaders.v
+#flag windows -l dbghelp
+// SymbolInfo is used by print_backtrace_skipping_top_frames_msvc
+pub struct SymbolInfo {
+pub mut:
+	f_size_of_struct u32 // must be 88 to be recognised by SymFromAddr
+	f_type_index     u32 // Type Index of symbol
+	f_reserved       [2]u64
+	f_index          u32
+	f_size           u32
+	f_mod_base       u64 // Base Address of module comtaining this symbol
+	f_flags          u32
+	f_value          u64  // Value of symbol, ValuePresent should be 1
+	f_address        u64  // Address of symbol including base address of module
+	f_register       u32  // register holding value or pointer to value
+	f_scope          u32  // scope of the symbol
+	f_tag            u32  // pdb classification
+	f_name_len       u32  // Actual length of name
+	f_max_name_len   u32  // must be manually set
+	f_name           byte // must be calloc(f_max_name_len)
+}
+
+pub struct SymbolInfoContainer {
+pub mut:
+	syminfo     SymbolInfo
+	f_name_rest [254]char
+}
+
+pub struct Line64 {
+pub mut:
+	f_size_of_struct u32
+	f_key            voidptr
+	f_line_number    u32
+	f_file_name      &byte
+	f_address        u64
+}
+
+// returns the current options mask
+fn C.SymSetOptions(symoptions u32) u32
+
+// returns handle
+fn C.GetCurrentProcess() voidptr
+
+fn C.SymInitialize(h_process voidptr, p_user_search_path &byte, b_invade_process int) int
+
+fn C.CaptureStackBackTrace(frames_to_skip u32, frames_to_capture u32, p_backtrace voidptr, p_backtrace_hash voidptr) u16
+
+fn C.SymFromAddr(h_process voidptr, address u64, p_displacement voidptr, p_symbol voidptr) int
+
+fn C.SymGetLineFromAddr64(h_process voidptr, address u64, p_displacement voidptr, p_line &Line64) int
+
+// Ref - https://docs.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-symsetoptions
+const (
+	symopt_undname               = 0x00000002
+	symopt_deferred_loads        = 0x00000004
+	symopt_no_cpp                = 0x00000008
+	symopt_load_lines            = 0x00000010
+	symopt_include_32bit_modules = 0x00002000
+	symopt_allow_zero_address    = 0x01000000
+	symopt_debug                 = 0x80000000
+)
+
+// g_original_codepage - used to restore the original windows console code page when exiting
+__global (
+	g_original_codepage = u32(0)
+)
+
+// utf8 to stdout needs C.SetConsoleOutputCP(C.CP_UTF8)
+fn C.GetConsoleOutputCP() u32
+
+fn C.SetConsoleOutputCP(wCodePageID u32) bool
+
+fn restore_codepage() {
+	C.SetConsoleOutputCP(g_original_codepage)
+}
+
+fn is_terminal(fd int) int {
+	mut mode := u32(0)
+	osfh := voidptr(C._get_osfhandle(fd))
+	C.GetConsoleMode(osfh, voidptr(&mode))
+	return int(mode)
+}
+
+fn builtin_init() {
+	g_original_codepage = C.GetConsoleOutputCP()
+	C.SetConsoleOutputCP(C.CP_UTF8)
+	C.atexit(restore_codepage)
+	if is_terminal(1) > 0 {
+		C.SetConsoleMode(C.GetStdHandle(C.STD_OUTPUT_HANDLE), C.ENABLE_PROCESSED_OUTPUT | C.ENABLE_WRAP_AT_EOL_OUTPUT | 0x0004) // enable_virtual_terminal_processing
+		C.SetConsoleMode(C.GetStdHandle(C.STD_ERROR_HANDLE), C.ENABLE_PROCESSED_OUTPUT | C.ENABLE_WRAP_AT_EOL_OUTPUT | 0x0004) // enable_virtual_terminal_processing
+		unsafe {
+			C.setbuf(C.stdout, 0)
+			C.setbuf(C.stderr, 0)
+		}
+	}
+	$if !no_backtrace ? {
+		add_unhandled_exception_handler()
+	}
+}
+
+fn print_backtrace_skipping_top_frames(skipframes int) bool {
+	$if msvc {
+		return print_backtrace_skipping_top_frames_msvc(skipframes)
+	}
+	$if tinyc {
+		return print_backtrace_skipping_top_frames_tcc(skipframes)
+	}
+	$if mingw {
+		return print_backtrace_skipping_top_frames_mingw(skipframes)
+	}
+	eprintln('print_backtrace_skipping_top_frames is not implemented')
+	return false
+}
+
+fn print_backtrace_skipping_top_frames_msvc(skipframes int) bool {
+	$if msvc {
+		mut offset := u64(0)
+		backtraces := [100]voidptr{}
+		sic := SymbolInfoContainer{}
+		mut si := &sic.syminfo
+		si.f_size_of_struct = sizeof(SymbolInfo) // Note: C.SYMBOL_INFO is 88
+		si.f_max_name_len = sizeof(SymbolInfoContainer) - sizeof(SymbolInfo) - 1
+		fname := &char(&si.f_name)
+		mut sline64 := Line64{
+			f_file_name: &byte(0)
+		}
+		sline64.f_size_of_struct = sizeof(Line64)
+
+		handle := C.GetCurrentProcess()
+		defer {
+			C.SymCleanup(handle)
+		}
+
+		C.SymSetOptions(symopt_debug | symopt_load_lines | symopt_undname)
+
+		syminitok := C.SymInitialize(handle, 0, 1)
+		if syminitok != 1 {
+			eprintln('Failed getting process: Aborting backtrace.\n')
+			return false
+		}
+
+		frames := int(C.CaptureStackBackTrace(skipframes + 1, 100, &backtraces[0], 0))
+		if frames < 2 {
+			eprintln('C.CaptureStackBackTrace returned less than 2 frames')
+			return false
+		}
+		for i in 0 .. frames {
+			frame_addr := backtraces[i]
+			if C.SymFromAddr(handle, frame_addr, &offset, si) == 1 {
+				nframe := frames - i - 1
+				mut lineinfo := ''
+				if C.SymGetLineFromAddr64(handle, frame_addr, &offset, &sline64) == 1 {
+					file_name := unsafe { tos3(sline64.f_file_name) }
+					lnumber := sline64.f_line_number
+					lineinfo = '$file_name:$lnumber'
+				} else {
+					addr:
+					lineinfo = '?? : address = 0x${(&frame_addr):x}'
+				}
+				sfunc := unsafe { tos3(fname) }
+				eprintln('${nframe:-2d}: ${sfunc:-25s}  $lineinfo')
+			} else {
+				// https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes
+				cerr := int(C.GetLastError())
+				if cerr == 87 {
+					eprintln('SymFromAddr failure: $cerr = The parameter is incorrect)')
+				} else if cerr == 487 {
+					// probably caused because the .pdb isn't in the executable folder
+					eprintln('SymFromAddr failure: $cerr = Attempt to access invalid address (Verify that you have the .pdb file in the right folder.)')
+				} else {
+					eprintln('SymFromAddr failure: $cerr (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)')
+				}
+			}
+		}
+		return true
+	} $else {
+		eprintln('print_backtrace_skipping_top_frames_msvc must be called only when the compiler is msvc')
+		return false
+	}
+}
+
+fn print_backtrace_skipping_top_frames_mingw(skipframes int) bool {
+	eprintln('print_backtrace_skipping_top_frames_mingw is not implemented')
+	return false
+}
+
+fn C.tcc_backtrace(fmt &char) int
+
+fn print_backtrace_skipping_top_frames_tcc(skipframes int) bool {
+	$if tinyc {
+		$if no_backtrace ? {
+			eprintln('backtraces are disabled')
+			return false
+		} $else {
+			C.tcc_backtrace(c'Backtrace')
+			return true
+		}
+	} $else {
+		eprintln('print_backtrace_skipping_top_frames_tcc must be called only when the compiler is tcc')
+		return false
+	}
+	// Not reachable, but it looks like it's not detectable by V
+	return false
+}
+
+// TODO copypaste from os
+// we want to be able to use this here without having to `import os`
+struct ExceptionRecord {
+pub:
+	// status_ constants
+	code        u32
+	flags       u32
+	record      &ExceptionRecord
+	address     voidptr
+	param_count u32
+	// params []voidptr
+}
+
+struct ContextRecord {
+	// TODO
+}
+
+struct ExceptionPointers {
+pub:
+	exception_record &ExceptionRecord
+	context_record   &ContextRecord
+}
+
+type VectoredExceptionHandler = fn (&ExceptionPointers) int
+
+fn C.AddVectoredExceptionHandler(int, C.PVECTORED_EXCEPTION_HANDLER)
+
+fn add_vectored_exception_handler(handler VectoredExceptionHandler) {
+	C.AddVectoredExceptionHandler(1, C.PVECTORED_EXCEPTION_HANDLER(handler))
+}
+
+[windows_stdcall]
+fn unhandled_exception_handler(e &ExceptionPointers) int {
+	match e.exception_record.code {
+		// These are 'used' by the backtrace printer
+		// so we dont want to catch them...
+		0x4001000A, 0x40010006 {
+			return 0
+		}
+		else {
+			println('Unhandled Exception 0x${e.exception_record.code:X}')
+			print_backtrace_skipping_top_frames(5)
+		}
+	}
+
+	return 0
+}
+
+fn add_unhandled_exception_handler() {
+	add_vectored_exception_handler(VectoredExceptionHandler(voidptr(unhandled_exception_handler)))
+}
+
+fn C.IsDebuggerPresent() bool
+
+fn C.__debugbreak()
+
+fn break_if_debugger_attached() {
+	$if tinyc {
+		unsafe {
+			mut ptr := &voidptr(0)
+			*ptr = voidptr(0)
+			_ = ptr
+		}
+	} $else {
+		if C.IsDebuggerPresent() {
+			C.__debugbreak()
+		}
+	}
+}
+
+// return an error message generated from WinAPI's `LastError`
+pub fn winapi_lasterr_str() string {
+	err_msg_id := C.GetLastError()
+	if err_msg_id == 8 {
+		// handle this case special since `FormatMessage()` might not work anymore
+		return 'insufficient memory'
+	}
+	mut msgbuf := &u16(0)
+	res := C.FormatMessage(C.FORMAT_MESSAGE_ALLOCATE_BUFFER | C.FORMAT_MESSAGE_FROM_SYSTEM | C.FORMAT_MESSAGE_IGNORE_INSERTS,
+		C.NULL, err_msg_id, C.MAKELANGID(C.LANG_NEUTRAL, C.SUBLANG_DEFAULT), &msgbuf,
+		0, C.NULL)
+	err_msg := if res == 0 {
+		'Win-API error $err_msg_id'
+	} else {
+		unsafe { string_from_wide(msgbuf) }
+	}
+	return err_msg
+}
+
+// panic with an error message generated from WinAPI's `LastError`
+[noreturn]
+pub fn panic_lasterr(base string) {
+	panic(base + winapi_lasterr_str())
+}