v/vlib/builtin/builtin_windows.v

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// Copyright (c) 2019 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
#include <dbghelp.h>
#flag windows -l dbghelp
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 {
f_size_of_struct u32
f_key voidptr
f_line_number u32
f_file_name byteptr
f_address u64
}
fn C.SymSetOptions(symoptions u32) u32 // returns the current options mask
fn C.GetCurrentProcess() voidptr // returns handle
fn C.SymInitialize(h_process voidptr, p_user_search_path byteptr, 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
)
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 := charptr( &si.f_name )
mut sline64 := Line64{}
sline64.f_size_of_struct = sizeof(Line64)
handle := C.GetCurrentProcess()
defer { C.SymCleanup(handle) }
options := C.SymSetOptions(SYMOPT_DEBUG | SYMOPT_LOAD_LINES | SYMOPT_UNDNAME)
syminitok := C.SymInitialize( handle, 0, 1)
if syminitok != 1 {
println('Failed getting process: Aborting backtrace.\n')
return true
}
frames := int( C.CaptureStackBackTrace(skipframes + 1, 100, backtraces, 0) )
for i:=0; i < frames; i++ {
// fugly pointer arithmetics follows ...
s := *voidptr( u64(backtraces) + u64(i*sizeof(voidptr)) )
symfa_ok := C.SymFromAddr( handle, *s, &offset, si )
if symfa_ok == 1 {
nframe := frames - i - 1
mut lineinfo := ''
symglfa_ok := C.SymGetLineFromAddr64(handle, *s, &offset, &sline64)
if symglfa_ok == 1 {
lineinfo = ' ${sline64.f_file_name}:${sline64.f_line_number}'
}
else {
//cerr := int(C.GetLastError()) println('SymGetLineFromAddr64 failure: $cerr ')
lineinfo = ' ?? : address= $s'
}
sfunc := tos3(fname)
println('${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) {
println('SymFromAddr failure: $cerr = The parameter is incorrect)')
}
else if (cerr == 487) {
// probably caused because the .pdb isn't in the executable folder
println('SymFromAddr failure: $cerr = Attempt to access invalid address (Verify that you have the .pdb file in the right folder.)')
}
else {
println('SymFromAddr failure: $cerr (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)')
}
}
}
return true
}
$else {
println('TODO: Not implemented on Windows without msvc.')
return false
}
}
fn print_backtrace_skipping_top_frames_mingw(skipframes int) bool {
println('TODO: print_backtrace_skipping_top_frames_mingw($skipframes)')
return false
}
fn print_backtrace_skipping_top_frames_nix(skipframes int) bool {
println('not implemented, see builtin_nix.v')
return false
}
pub fn println(s string) {
print('$s\n')
}