136 lines
4.3 KiB
V
136 lines
4.3 KiB
V
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module builtin
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#include <dbghelp.h>
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#flag windows -l dbghelp
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pub struct SymbolInfo {
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pub mut:
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f_size_of_struct u32 // must be 88 to be recognised by SymFromAddr
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f_type_index u32 // Type Index of symbol
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f_reserved [2]u64
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f_index u32
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f_size u32
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f_mod_base u64 // Base Address of module comtaining this symbol
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f_flags u32
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f_value u64 // Value of symbol, ValuePresent should be 1
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f_address u64 // Address of symbol including base address of module
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f_register u32 // register holding value or pointer to value
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f_scope u32 // scope of the symbol
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f_tag u32 // pdb classification
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f_name_len u32 // Actual length of name
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f_max_name_len u32 // must be manually set
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f_name byte // must be calloc(f_max_name_len)
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}
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pub struct SymbolInfoContainer {
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pub mut:
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syminfo SymbolInfo
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f_name_rest [254]char
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}
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pub struct Line64 {
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f_size_of_struct u32
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f_key voidptr
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f_line_number u32
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f_file_name byteptr
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f_address u64
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}
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fn C.SymSetOptions(symoptions u32) u32 // returns the current options mask
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fn C.GetCurrentProcess() voidptr // returns handle
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fn C.SymInitialize(h_process voidptr, p_user_search_path byteptr, b_invade_process int) int
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fn C.CaptureStackBackTrace(frames_to_skip u32, frames_to_capture u32, p_backtrace voidptr, p_backtrace_hash voidptr) u16
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fn C.SymFromAddr(h_process voidptr, address u64, p_displacement voidptr, p_symbol voidptr) int
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fn C.SymGetLineFromAddr64(h_process voidptr, address u64, p_displacement voidptr, p_line &Line64) int
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// Ref - https://docs.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-symsetoptions
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const (
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SYMOPT_UNDNAME = 0x00000002
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SYMOPT_DEFERRED_LOADS = 0x00000004
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SYMOPT_NO_CPP = 0x00000008
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SYMOPT_LOAD_LINES = 0x00000010
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SYMOPT_INCLUDE_32BIT_MODULES = 0x00002000
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SYMOPT_ALLOW_ZERO_ADDRESS = 0x01000000
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SYMOPT_DEBUG = 0x80000000
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)
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fn print_backtrace_skipping_top_frames_msvc(skipframes int) bool {
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$if msvc {
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mut offset := u64(0)
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backtraces := [100]voidptr
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sic := SymbolInfoContainer{}
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mut si := &sic.syminfo
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si.f_size_of_struct = sizeof(SymbolInfo) // Note: C.SYMBOL_INFO is 88
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si.f_max_name_len = sizeof(SymbolInfoContainer) - sizeof(SymbolInfo) - 1
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fname := charptr( &si.f_name )
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mut sline64 := Line64{}
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sline64.f_size_of_struct = sizeof(Line64)
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handle := C.GetCurrentProcess()
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defer { C.SymCleanup(handle) }
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options := C.SymSetOptions(SYMOPT_DEBUG | SYMOPT_LOAD_LINES | SYMOPT_UNDNAME)
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syminitok := C.SymInitialize( handle, 0, 1)
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if syminitok != 1 {
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println('Failed getting process: Aborting backtrace.\n')
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return true
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}
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frames := int( C.CaptureStackBackTrace(skipframes + 1, 100, backtraces, 0) )
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for i:=0; i < frames; i++ {
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// fugly pointer arithmetics follows ...
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s := *voidptr( u64(backtraces) + u64(i*sizeof(voidptr)) )
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symfa_ok := C.SymFromAddr( handle, *s, &offset, si )
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if symfa_ok == 1 {
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nframe := frames - i - 1
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mut lineinfo := ''
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symglfa_ok := C.SymGetLineFromAddr64(handle, *s, &offset, &sline64)
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if symglfa_ok == 1 {
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lineinfo = ' ${sline64.f_file_name}:${sline64.f_line_number}'
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}
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else {
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//cerr := int(C.GetLastError()) println('SymGetLineFromAddr64 failure: $cerr ')
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lineinfo = ' ?? : address= $s'
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}
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sfunc := tos3(fname)
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println('${nframe:-2d}: ${sfunc:-25s} $lineinfo')
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}
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else {
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// https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes
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cerr := int(C.GetLastError())
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if (cerr == 87) {
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println('SymFromAddr failure: $cerr = The parameter is incorrect)')
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}
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else if (cerr == 487) {
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// probably caused because the .pdb isn't in the executable folder
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println('SymFromAddr failure: $cerr = Attempt to access invalid address (Verify that you have the .pdb file in the right folder.)')
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}
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else {
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println('SymFromAddr failure: $cerr (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)')
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}
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}
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}
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return true
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}
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$else {
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println('TODO: Not implemented on Windows without msvc.')
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return false
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}
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}
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fn print_backtrace_skipping_top_frames_mingw(skipframes int) bool {
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println('TODO: print_backtrace_skipping_top_frames_mingw($skipframes)')
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return false
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}
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fn print_backtrace_skipping_top_frames_nix(skipframes int) bool {
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println('not implemented, see builtin_nix.v')
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return false
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}
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