tmore features - plan9port - [fork] Plan 9 from user space
(HTM) git clone git://src.adamsgaard.dk/plan9port
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit e8a7b9699925f3f650593d07eb382155e9374ae6
(DIR) parent 2189e55cde473b2a81492759526f824b0ecd227e
(HTM) Author: rsc <devnull@localhost>
Date: Mon, 27 Dec 2004 17:01:23 +0000
more features
Diffstat:
A src/libmach/cmdline.c | 187 +++++++++++++++++++++++++++++++
A src/libmach/elfdl386.c | 133 +++++++++++++++++++++++++++++++
A src/libmach/elfnm.c | 38 +++++++++++++++++++++++++++++++
A src/libmach/pthread.c | 49 +++++++++++++++++++++++++++++++
A src/libmach/t.c | 269 +++++++++++++++++++++++++++++++
5 files changed, 676 insertions(+), 0 deletions(-)
---
(DIR) diff --git a/src/libmach/cmdline.c b/src/libmach/cmdline.c
t@@ -0,0 +1,187 @@
+#include <u.h>
+#include <libc.h>
+#include <mach.h>
+
+Fhdr *symhdr;
+Fhdr *corhdr;
+char *symfil;
+char *corfil;
+int corpid;
+Regs *correg;
+Map *symmap;
+Map *cormap;
+
+int
+alldigs(char *s)
+{
+ while(*s){
+ if(*s<'0' || '9'<*s)
+ return 0;
+ s++;
+ }
+ return 1;
+}
+
+/*
+ * attach to arguments in argc, argv
+ */
+int
+attachargs(int argc, char **argv, int omode)
+{
+ int i;
+ Fhdr *hdr;
+ char *s;
+
+ symhdr = nil;
+ corhdr = nil;
+ symfil = nil;
+ corfil = nil;
+ corpid = 0;
+ correg = nil;
+
+ for(i=0; i<argc; i++){
+ if(alldigs(argv[i])){
+ if(corpid){
+ fprint(2, "already have corpid %d; ignoring corpid %d\n", corpid, argv[i]);
+ continue;
+ }
+ if(corhdr){
+ fprint(2, "already have core %s; ignoring corpid %d\n", corfil, corpid);
+ continue;
+ }
+ corpid = atoi(argv[i]);
+ continue;
+ }
+ if((hdr = crackhdr(argv[i], omode)) == nil){
+ fprint(2, "crackhdr %s: %r\n", argv[i]);
+ continue;
+ }
+ fprint(2, "%s: %s %s %s\n", argv[i], hdr->aname, hdr->mname, hdr->fname);
+ if(hdr->ftype == FCORE){
+ if(corpid){
+ fprint(2, "already have corpid %d; ignoring core %s\n", corpid, argv[i]);
+ uncrackhdr(hdr);
+ continue;
+ }
+ if(corhdr){
+ fprint(2, "already have core %s; ignoring core %s\n", corfil, argv[i]);
+ uncrackhdr(hdr);
+ continue;
+ }
+ corhdr = hdr;
+ corfil = argv[i];
+ }else{
+ if(symhdr){
+ fprint(2, "already have text %s; ignoring text %s\n", symfil, argv[i]);
+ uncrackhdr(hdr);
+ continue;
+ }
+ symhdr = hdr;
+ symfil = argv[i];
+ }
+ }
+
+ if(symhdr == nil){
+ symfil = "a.out"; /* default */
+ if(corpid){ /* try from corpid */
+ if((s = proctextfile(corpid)) != nil){
+ fprint(2, "corpid %d: text %s\n", corpid, s);
+ symfil = s;
+ }
+ }
+ if(corhdr){ /* try from core */
+ if(corhdr->txtfil != nil){
+ fprint(2, "core %s: text %s\n", corfil, corhdr->txtfil);
+ symfil = corhdr->txtfil;
+ }
+ }
+ if((symhdr = crackhdr(symfil, omode)) == nil){
+ fprint(2, "crackhdr %s: %r\n", symfil);
+ symfil = nil;
+ }
+ }
+
+ if(symhdr)
+ syminit(symhdr);
+
+ if(!mach)
+ mach = machcpu;
+
+ /*
+ * Set up maps
+ */
+ symmap = allocmap();
+ cormap = allocmap();
+ if(symmap == nil || cormap == nil)
+ sysfatal("allocating maps: %r");
+
+ if(symhdr){
+ if(mapfile(symhdr, 0, symmap, nil) < 0)
+ fprint(2, "mapfile %s: %r\n", symfil);
+ mapfile(symhdr, 0, cormap, nil);
+ }
+
+ if(corpid)
+ attachproc(corpid);
+
+ if(corhdr)
+ attachcore(corhdr);
+
+ return 0;
+}
+
+static int thecorpid;
+static Fhdr *thecorhdr;
+
+static void
+unattach(void)
+{
+ unmapproc(cormap);
+ unmapfile(corhdr, cormap);
+ free(correg);
+ correg = nil;
+ thecorpid = 0;
+ thecorhdr = nil;
+ corpid = 0;
+ corhdr = nil;
+ corfil = nil;
+}
+
+int
+attachproc(int pid)
+{
+ unattach();
+ if(pid == 0)
+ return 0;
+ if(mapproc(pid, cormap, &correg) < 0){
+ fprint(2, "attachproc %d: %r\n", pid);
+ return -1;
+ }
+ thecorpid = pid;
+ corpid = pid;
+ return 0;
+}
+
+int
+attachcore(Fhdr *hdr)
+{
+ unattach();
+ if(corhdr == nil)
+ return 0;
+ if(mapfile(hdr, 0, cormap, &correg) < 0){
+ fprint(2, "attachcore %s: %r\n", hdr->filename);
+ return -1;
+ }
+ thecorhdr = hdr;
+ corhdr = hdr;
+ corfil = hdr->filename;
+ return 0;
+}
+
+int
+attachdynamic(void)
+{
+ elfdl386mapdl();
+ return 0;
+}
+
(DIR) diff --git a/src/libmach/elfdl386.c b/src/libmach/elfdl386.c
t@@ -0,0 +1,133 @@
+#include <u.h>
+#include <libc.h>
+#include <mach.h>
+#include "elf.h"
+
+/*
+aggr Linkdebug
+{
+ 'X' 0 version;
+ 'X' 4 map;
+};
+
+aggr Linkmap
+{
+ 'X' 0 addr;
+ 'X' 4 name;
+ 'X' 8 dynsect;
+ 'X' 12 next;
+ 'X' 16 prev;
+};
+*/
+enum
+{
+ DT_NULL = 0,
+ DT_NEEDED,
+ DT_PLTRRELSZ,
+ DT_PLTGOT,
+ DT_HASH,
+ DT_STRTAB,
+ DT_SYMTAB,
+ DT_RELA,
+ DT_RELASZ = 8,
+ DT_RELAENT,
+ DT_STSZ,
+ DT_SYMENT,
+ DT_INIT,
+ DT_FINI,
+ DT_SONAME,
+ DT_RPATH,
+ DT_SYMBOLIC = 16,
+ DT_REL,
+ DT_RELSZ,
+ DT_RELENT,
+ DT_PLTREL,
+ DT_DEBUG,
+ DT_TEXTREL,
+ DT_JMPREL,
+};
+
+static int
+getstr(Map *map, ulong addr, char *buf, uint nbuf)
+{
+ int i;
+
+ for(i=0; i<nbuf; i++){
+ if(get1(map, addr+i, buf+i, 1) < 0)
+ return -1;
+ if(buf[i] == 0)
+ return 0;
+ }
+ return -1; /* no nul */
+}
+
+static ulong
+dyninfo(Fhdr *hdr, int x)
+{
+ u32int addr, u;
+
+ if(hdr == nil || (addr = ((Elf*)hdr->elf)->dynamic) == 0){
+ fprint(2, "no hdr/dynamic %p\n", hdr);
+ return 0;
+ }
+ addr += hdr->base;
+
+ while(addr != 0){
+ if(get4(cormap, addr, &u) < 0)
+ return 0;
+ if(u == x){
+ if(get4(cormap, addr+4, &u) < 0)
+ return 0;
+ return u;
+ }
+ addr += 8;
+ }
+ return 0;
+}
+
+void
+elfdl386mapdl(void)
+{
+ int i;
+ Fhdr *hdr;
+ u32int linkdebug, linkmap, name, addr;
+ char buf[1024];
+
+print("elfdl386mapdl\n");
+ if((linkdebug = dyninfo(symhdr, DT_DEBUG)) == 0){
+ fprint(2, "no dt_debug section\n");
+ return;
+ }
+ if(get4(cormap, linkdebug+4, &linkmap) < 0){
+ fprint(2, "get4 linkdebug+4 (0x%lux) failed\n", linkdebug);
+ return;
+ }
+
+ for(i=0; i<100 && linkmap != 0; i++){
+ if(get4(cormap, linkmap, &addr) < 0
+ || get4(cormap, linkmap+4, &name) < 0
+ || get4(cormap, linkmap+12, &linkmap) < 0)
+ break;
+
+ if(name
+ && getstr(cormap, name, buf, sizeof buf) >= 0
+ && buf[0]
+ && access(buf, AEXIST) >= 0){
+ if((hdr = crackhdr(buf, OREAD)) == nil)
+ fprint(2, "crackhdr %s: %r\n", buf);
+ else{
+ fprint(2, "%s: %s %s %s\n", buf, hdr->aname, hdr->mname, hdr->fname);
+ hdr->base = addr;
+ if(mapfile(hdr, addr, symmap, nil) < 0)
+ fprint(2, "mapfile %s: %r\n", buf);
+ if(corhdr){
+ unmapfile(corhdr, cormap);
+ mapfile(hdr, addr, cormap, nil);
+ }
+ if(syminit(hdr) < 0)
+ fprint(2, "syminit %s: %\r", buf);
+ }
+ }
+ }
+}
+
(DIR) diff --git a/src/libmach/elfnm.c b/src/libmach/elfnm.c
t@@ -0,0 +1,38 @@
+#include <u.h>
+#include <libc.h>
+#include <mach.h>
+#include <elf.h>
+
+void
+usage(void)
+{
+ fprint(2, "usage: elfnm file...\n");
+ exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+ ElfSym esym;
+ Fhdr *fp;
+ int i, j;
+
+ ARGBEGIN{
+ default:
+ usage();
+ }ARGEND
+
+ if(argc == 0)
+ usage();
+
+ for(i=0; i<argc; i++){
+ if((fp = crackhdr(argv[i], OREAD)) == nil){
+ fprint(2, "%s: %r\n", argv[i]);
+ continue;
+ }
+ for(j=0; elfsym(fp->elf, j, &esym)>=0; j++)
+ print("%s 0x%lux\n", esym.name, esym.value);
+ uncrackhdr(fp);
+ }
+ exits(0);
+}
(DIR) diff --git a/src/libmach/pthread.c b/src/libmach/pthread.c
t@@ -0,0 +1,49 @@
+#include <u.h>
+#include <thread_db.h>
+#include <sys/ptrace.h>
+#include <errno.h>
+#include <sys/procfs.h> /* psaddr_t */
+#include <libc.h>
+#include <mach.h>
+
+static char *tderrstr[] =
+{
+[TD_OK] "no error",
+[TD_ERR] "some error",
+[TD_NOTHR] "no matching thread found",
+[TD_NOSV] "no matching synchronization handle found",
+[TD_NOLWP] "no matching light-weight process found",
+[TD_BADPH] "invalid process handle",
+[TD_BADTH] "invalid thread handle",
+[TD_BADSH] "invalid synchronization handle",
+[TD_BADTA] "invalid thread agent",
+[TD_BADKEY] "invalid key",
+[TD_NOMSG] "no event available",
+[TD_NOFPREGS] "no floating-point register content available",
+[TD_NOLIBTHREAD] "application not linked with thread library",
+[TD_NOEVENT] "requested event is not supported",
+[TD_NOEVENT] "requested event is not supported",
+[TD_NOCAPAB] "capability not available",
+[TD_DBERR] "internal debug library error",
+[TD_NOAPLIC] "operation is not applicable",
+[TD_NOTSD] "no thread-specific data available",
+[TD_MALLOC] "out of memory",
+[TD_PARTIALREG] "not entire register set was read or written",
+[TD_NOXREGS] "X register set not available for given threads",
+[TD_TLSDEFER] "thread has not yet allocated TLS for given module",
+[TD_VERSION] "version mismatch twixt libpthread and libthread_db",
+[TD_NOTLS] "there is no TLS segment in the given module",
+};
+
+static char*
+terr(int e)
+{
+ static char buf[50];
+
+ if(e < 0 || e >= nelem(tderrstr) || tderrstr[e] == nil){
+ snprint(buf, sizeof buf, "thread err %d", e);
+ return buf;
+ }
+ return tderrstr[e];
+}
+
(DIR) diff --git a/src/libmach/t.c b/src/libmach/t.c
t@@ -0,0 +1,269 @@
+#include <u.h>
+#include <thread_db.h>
+#include <sys/ptrace.h>
+#include <errno.h>
+#include <sys/procfs.h> /* psaddr_t */
+#include <libc.h>
+#include <mach.h>
+#include "ureg386.h"
+
+int td_get_allthreads(td_thragent_t *ta, td_thrhandle_t **pall);
+
+static char *tderrstr[] =
+{
+[TD_OK] "no error",
+[TD_ERR] "some error",
+[TD_NOTHR] "no matching thread found",
+[TD_NOSV] "no matching synchronization handle found",
+[TD_NOLWP] "no matching light-weight process found",
+[TD_BADPH] "invalid process handle",
+[TD_BADTH] "invalid thread handle",
+[TD_BADSH] "invalid synchronization handle",
+[TD_BADTA] "invalid thread agent",
+[TD_BADKEY] "invalid key",
+[TD_NOMSG] "no event available",
+[TD_NOFPREGS] "no floating-point register content available",
+[TD_NOLIBTHREAD] "application not linked with thread library",
+[TD_NOEVENT] "requested event is not supported",
+[TD_NOEVENT] "requested event is not supported",
+[TD_NOCAPAB] "capability not available",
+[TD_DBERR] "internal debug library error",
+[TD_NOAPLIC] "operation is not applicable",
+[TD_NOTSD] "no thread-specific data available",
+[TD_MALLOC] "out of memory",
+[TD_PARTIALREG] "not entire register set was read or written",
+[TD_NOXREGS] "X register set not available for given threads",
+[TD_TLSDEFER] "thread has not yet allocated TLS for given module",
+[TD_VERSION] "version mismatch twixt libpthread and libthread_db",
+[TD_NOTLS] "there is no TLS segment in the given module",
+};
+
+static char*
+terr(int e)
+{
+ static char buf[50];
+
+ if(e < 0 || e >= nelem(tderrstr) || tderrstr[e] == nil){
+ snprint(buf, sizeof buf, "thread err %d", e);
+ return buf;
+ }
+ return tderrstr[e];
+}
+
+void
+usage(void)
+{
+ fprint(2, "usage: t pid\n");
+ exits("usage");
+}
+
+#define STRINGSZ 128
+
+/*
+ * print the value of dot as file:line
+ */
+void
+printsource(long dot)
+{
+ char str[STRINGSZ];
+
+ if (fileline(dot, str, STRINGSZ) >= 0)
+ print("%s", str);
+}
+
+void
+printlocals(Symbol *fn, Regs *regs)
+{
+ int i;
+ u32int v;
+ Symbol s;
+
+ for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
+ if (s.class != CAUTO)
+ continue;
+ if(lget4(cormap, regs, s.loc, &v) >= 0)
+ print("\t%s.%s/\t%#lux\n", fn->name, s.name, v);
+ else
+ print("\t%s.%s/\t?\n", fn->name, s.name);
+ }
+}
+
+void
+printparams(Symbol *fn, Regs *regs)
+{
+ int i;
+ Symbol s;
+ u32int v;
+ int first = 0;
+ ulong pc, sp, bp;
+
+ if(0) print("pc=%lux sp=%lux bp=%lux ",
+ (rget(regs, "PC", &pc), pc),
+ (rget(regs, "SP", &sp), sp),
+ (rget(regs, "BP", &bp), bp));
+ for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
+ if (s.class != CPARAM)
+ continue;
+ if (first++)
+ print(", ");
+ if(0) print("(%d.%s.%ux.%x)", s.loc.type, s.loc.reg, s.loc.addr, s.loc.offset);
+ if(lget4(cormap, regs, s.loc, &v) >= 0)
+ print("%s=%#lux", s.name, v);
+ else
+ print("%s=?", s.name);
+ }
+}
+
+/*
+ * callback on stack trace
+ */
+static int
+xtrace(Map *map, Regs *regs, ulong pc, ulong nextpc, Symbol *sym, int depth)
+{
+ char buf[512];
+
+ USED(map);
+ print("\t");
+ if(sym){
+ print("%s(", sym->name);
+ printparams(sym, regs);
+ print(")+0x%ux ", pc-sym->loc.addr);
+ }else
+ print("%#lux ", pc);
+ printsource(pc);
+
+ print(" called from ");
+ symoff(buf, 512, nextpc, CTEXT);
+ print("%s ", buf);
+/* printsource(nextpc); */
+ print("\n");
+ if(sym)
+ printlocals(sym, regs);
+ return depth<40;
+}
+
+void
+main(int argc, char **argv)
+{
+ struct ps_prochandle p;
+ prgregset_t regs;
+ int e;
+ td_thragent_t *ta;
+ td_thrhandle_t *ts;
+ td_thrinfo_t info;
+ int i, n;
+ Ureg *u;
+ UregRegs r;
+
+ ARGBEGIN{
+ default:
+ usage();
+ }ARGEND
+
+ attachargs(argc, argv, OREAD);
+ attachdynamic();
+
+ if(!corpid && !corhdr)
+ sysfatal("could not attach to process");
+
+ p.pid = corpid;
+ if((e = td_ta_new(&p, &ta)) != TD_OK)
+ sysfatal("td_ta_new: %s", terr(e));
+ if((e = td_ta_get_nthreads(ta, &n)) != TD_OK)
+ sysfatal("td_ta_get_nthreads: %s", terr(e));
+ print("%d threads\n", n);
+
+ if((n = td_get_allthreads(ta, &ts)) < 0)
+ sysfatal("td_get_allthreads: %r");
+ print("%d threads - regs = %p\n", n, regs);
+ for(i=0; i<n; i++){
+ if((e = td_thr_get_info(&ts[i], &info)) != TD_OK)
+ sysfatal("td_thr_get_info: %s", terr(e));
+ print("%d: startfunc=%lux stkbase=%lux pc=%lux sp=%lux lid=%d\n",
+ i, info.ti_startfunc, info.ti_stkbase, info.ti_pc, info.ti_sp, info.ti_lid);
+ if((e = td_thr_getgregs(&ts[i], regs)) != TD_OK)
+ sysfatal("td_thr_getregs: %s", terr(e));
+ print("%d: pc=%lux sp=%lux gs=%lux\n", i, regs[12], regs[15], regs[10]);
+ if((u = _linux2ureg386((UregLinux386*)regs)) == nil)
+ sysfatal("%r");
+ r.r.rw = _uregrw;
+ r.ureg = (uchar*)u;
+ stacktrace(cormap, &r.r, xtrace);
+ }
+ exits(0);
+}
+
+typedef struct AllThread AllThread;
+struct AllThread
+{
+ td_thrhandle_t *a;
+ int n;
+ int err;
+};
+
+static int
+thritercb(const td_thrhandle_t *th, void *cb)
+{
+ td_thrhandle_t **p;
+ AllThread *a;
+ int n;
+
+ a = cb;
+ if((a->n&(a->n-1)) == 0){
+ if(a->n == 0)
+ n = 1;
+ else
+ n = a->n<<1;
+ if((p = realloc(a->a, n*sizeof a->a[0])) == 0){
+ a->err = -1;
+ return -1; /* stop iteration */
+ }
+ a->a = p;
+ }
+ a->a[a->n++] = *th;
+ return 0;
+}
+
+int
+td_get_allthreads(td_thragent_t *ta, td_thrhandle_t **pall)
+{
+ int e;
+ AllThread a;
+
+ a.a = nil;
+ a.n = 0;
+ a.err = 0;
+ if((e = td_ta_thr_iter(ta, thritercb, &a,
+ TD_THR_ANY_STATE,
+ TD_THR_LOWEST_PRIORITY,
+ TD_SIGNO_MASK,
+ TD_THR_ANY_USER_FLAGS)) != TD_OK){
+ werrstr("%s", terr(e));
+ return -1;
+ }
+
+ if(a.err){
+ free(a.a);
+ return -1;
+ }
+
+ *pall = a.a;
+ return a.n;
+}
+
+/*
+td_err_e td_ta_map_id2thr(const td_thragent_t *ta_p, thread_t tid,td_thrhandle_t *th_p);
+*/
+
+/*
+int
+threadregs(int tid, Regs **rp)
+{
+ check pid
+ look up tid (td_ta_map_id2thr)
+ create Regs with thr handle inside
+ rw function calls thr_getregs and then
+ pulls out the desired register
+}
+
+*/