98 lines
1.7 KiB
C
98 lines
1.7 KiB
C
#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <mach.h>
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#define Extern extern
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#include "power.h"
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#define STRINGSZ 128
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/*
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* print the value of dot as file:line
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*/
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void
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printsource(long dot)
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{
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char str[STRINGSZ];
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if (fileline(str, STRINGSZ, dot))
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Bprint(bioout, "%s", str);
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}
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void
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printlocals(Symbol *fn, ulong fp)
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{
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int i;
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Symbol s;
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s = *fn;
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for (i = 0; localsym(&s, i); i++) {
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if (s.class != CAUTO)
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continue;
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Bprint(bioout, "\t%s=#%lux\n", s.name, getmem_4(fp-s.value));
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}
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}
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void
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printparams(Symbol *fn, ulong fp)
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{
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int i;
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Symbol s;
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int first;
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fp += mach->szreg; /* skip saved pc */
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s = *fn;
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for (first = i = 0; localsym(&s, i); i++) {
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if (s.class != CPARAM)
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continue;
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if (first++)
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Bprint(bioout, ", ");
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Bprint(bioout, "%s=#%lux", s.name, getmem_4(fp+s.value));
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}
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Bprint(bioout, ") ");
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}
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#define STARTSYM "_main"
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#define FRAMENAME ".frame"
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void
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stktrace(int modif)
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{
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ulong pc, sp;
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Symbol s, f;
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int i;
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char buf[512];
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pc = reg.pc;
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sp = reg.r[1];
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i = 0;
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while (findsym(pc, CTEXT, &s)) {
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if(strcmp(STARTSYM, s.name) == 0) {
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Bprint(bioout, "%s() at #%llux\n", s.name, s.value);
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break;
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}
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if (pc == s.value) /* at first instruction */
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f.value = 0;
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else if (findlocal(&s, FRAMENAME, &f) == 0)
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break;
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if (s.type == 'L' || s.type == 'l' || pc <= s.value+4)
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pc = reg.lr;
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else pc = getmem_4(sp);
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sp += f.value;
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Bprint(bioout, "%s(", s.name);
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printparams(&s, sp);
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printsource(s.value);
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Bprint(bioout, " called from ");
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symoff(buf, sizeof(buf), pc-4, CTEXT);
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Bprint(bioout, buf);
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printsource(pc-8);
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Bprint(bioout, "\n");
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if(modif == 'C')
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printlocals(&s, sp);
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if(++i > 40){
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Bprint(bioout, "(trace truncated)\n");
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break;
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}
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}
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}
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