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builtin: cleanup by turning backtrace* fns to ordinary C. fns
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@ -64,8 +64,8 @@ fn print_backtrace_skipping_top_frames(xskipframes int) bool {
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fn print_backtrace_skipping_top_frames_mac(skipframes int) bool {
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$if macos {
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buffer := [100]byteptr
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nr_ptrs := backtrace(buffer, 100)
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backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 2)
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nr_ptrs := C.backtrace(buffer, 100)
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C.backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 2)
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}
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return true
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}
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@ -73,65 +73,65 @@ fn print_backtrace_skipping_top_frames_mac(skipframes int) bool {
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fn print_backtrace_skipping_top_frames_freebsd(skipframes int) bool {
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$if freebsd {
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buffer := [100]byteptr
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nr_ptrs := backtrace(buffer, 100)
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backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 2)
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nr_ptrs := C.backtrace(buffer, 100)
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C.backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 2)
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}
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return true
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}
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fn print_backtrace_skipping_top_frames_linux(skipframes int) bool {
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$if tinyc {
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println('TODO: print_backtrace_skipping_top_frames_linux $skipframes with tcc fails tests with "stack smashing detected" .')
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$if android {
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eprintln('On Android no backtrace is available.')
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return false
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}
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$if !android {
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// backtrace is not available on Android.
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$if glibc {
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buffer := [100]byteptr
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nr_ptrs := backtrace(buffer, 100)
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nr_actual_frames := nr_ptrs - skipframes
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mut sframes := []string{}
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//////csymbols := backtrace_symbols(*voidptr(&buffer[skipframes]), nr_actual_frames)
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csymbols := backtrace_symbols(&buffer[skipframes], nr_actual_frames)
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for i in 0 .. nr_actual_frames {
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sframes << tos2( byteptr( voidptr(csymbols[i]) ) )
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}
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for sframe in sframes {
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executable := sframe.all_before('(')
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addr := sframe.all_after('[').all_before(']')
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beforeaddr := sframe.all_before('[')
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cmd := 'addr2line -e $executable $addr'
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// taken from os, to avoid depending on the os module inside builtin.v
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f := C.popen(cmd.str, 'r')
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if isnil(f) {
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eprintln(sframe)
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continue
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}
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buf := [1000]byte
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mut output := ''
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for C.fgets(charptr(buf), 1000, f) != 0 {
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output += tos(buf, vstrlen(buf))
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}
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output = output.trim_space() + ':'
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if C.pclose(f) != 0 {
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eprintln(sframe)
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continue
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}
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if output in ['??:0:', '??:?:'] {
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output = ''
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}
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// See http://wiki.dwarfstd.org/index.php?title=Path_Discriminators
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// NB: it is shortened here to just d. , just so that it fits, and so
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// that the common error file:lineno: line format is enforced.
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output = output.replace(' (discriminator', ': (d.')
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eprintln('${output:-46s} | ${addr:14s} | $beforeaddr')
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}
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// backtrace_symbols_fd(*voidptr(&buffer[skipframes]), nr_actual_frames, 1)
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return true
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} $else {
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eprintln('backtrace_symbols_fd is missing, so printing backtraces is not available.\n')
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eprintln('Some libc implementations like musl simply do not provide it.')
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}
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$if !glibc {
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eprintln('backtrace_symbols is missing => printing backtraces is not available.')
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eprintln('Some libc implementations like musl simply do not provide it.')
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return false
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}
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return false
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$if tinyc {
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eprintln('TODO: print_backtrace_skipping_top_frames_linux $skipframes')
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eprintln('with tcc fails tests with "stack smashing detected" .')
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return false
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}
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buffer := [100]byteptr
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nr_ptrs := C.backtrace(buffer, 100)
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nr_actual_frames := nr_ptrs - skipframes
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mut sframes := []string{}
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//////csymbols := backtrace_symbols(*voidptr(&buffer[skipframes]), nr_actual_frames)
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csymbols := C.backtrace_symbols(&buffer[skipframes], nr_actual_frames)
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for i in 0 .. nr_actual_frames {
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sframes << tos2( byteptr(csymbols[i]) )
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}
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for sframe in sframes {
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executable := sframe.all_before('(')
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addr := sframe.all_after('[').all_before(']')
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beforeaddr := sframe.all_before('[')
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cmd := 'addr2line -e $executable $addr'
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// taken from os, to avoid depending on the os module inside builtin.v
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f := C.popen(cmd.str, 'r')
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if isnil(f) {
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eprintln(sframe)
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continue
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}
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buf := [1000]byte
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mut output := ''
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for C.fgets(charptr(buf), 1000, f) != 0 {
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output += tos(buf, vstrlen(buf))
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}
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output = output.trim_space() + ':'
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if C.pclose(f) != 0 {
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eprintln(sframe)
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continue
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}
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if output in ['??:0:', '??:?:'] {
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output = ''
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}
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// See http://wiki.dwarfstd.org/index.php?title=Path_Discriminators
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// NB: it is shortened here to just d. , just so that it fits, and so
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// that the common error file:lineno: line format is enforced.
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output = output.replace(' (discriminator', ': (d.')
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eprintln('${output:-46s} | ${addr:14s} | $beforeaddr')
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}
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return true
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}
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@ -26,10 +26,10 @@ fn C.isdigit(s byteptr) bool
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fn C.popen(c byteptr, t byteptr) voidptr
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// <execinfo.h>
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// backtrace functions are not #included, that's why they have to be defined without C.
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fn backtrace(a &voidptr, b int) int
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fn backtrace_symbols(a &voidptr, size int) &charptr
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fn backtrace_symbols_fd(a &voidptr, size int, fd int) void
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fn C.backtrace(a &voidptr, size int) int
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fn C.backtrace_symbols(a &voidptr, size int) &charptr
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fn C.backtrace_symbols_fd(a &voidptr, size int, fd int)
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// <libproc.h>
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fn proc_pidpath(int, voidptr, int) int
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@ -22,12 +22,6 @@ fn (mut g Gen) gen_fn_decl(it ast.FnDecl) {
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if g.attr == 'inline' {
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g.write('inline ')
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}
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if it.name in ['backtrace', 'backtrace_symbols', 'backtrace_symbols_fd'] {
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// these are actually defined as C functions in execinfo.h
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// TODO: remove this check, *after* they are defined as C. in cfns.c.v
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// in bootstrap phase 2
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return
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}
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//
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is_livefn := g.attr == 'live'
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is_livemain := g.pref.is_livemain && is_livefn
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