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runtime: copy print/println support from Go 1.7

Browse source 
Update the compiler to use the new names.  Add calls to printlock and
    printunlock around print statements.  Move expression evaluation before
    the call to printlock.  Update g's writebuf field to a slice, and adjust
    C code accordingly.
    
    Reviewed-on: https://go-review.googlesource.com/30717

From-SVN: r240956
This commit is contained in:
Ian Lance Taylor 2016-10-10 23:13:39 +00:00
parent 73f01cca84
commit 65180edc56
13 changed files with 178 additions and 355 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
gcc/go/gofrontend/MERGE
View file

@ -1,4 +1,4 @@
f3658aea2493c7f1c4a72502f9e7da562c7764c4
ecf9b645cefc5c3b4e6339adeb452b2d8642cf3e
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

71
gcc/go/gofrontend/expressions.cc
View file

@ -7018,6 +7018,26 @@ Builtin_call_expression::do_lower(Gogo* gogo, Named_object* function,
}
}
break;
case BUILTIN_PRINT:
case BUILTIN_PRINTLN:
// Force all the arguments into temporary variables, so that we
// don't try to evaluate something while holding the print lock.
if (this->args() == NULL)
break;
for (Expression_list::iterator pa = this->args()->begin();
pa != this->args()->end();
++pa)
{
if (!(*pa)->is_variable())
{
Temporary_statement* temp =
Statement::make_temporary(NULL, *pa, loc);
inserter->insert(temp);
*pa = Expression::make_temporary_reference(temp, loc);
}
}
break;
}
return this;
@ -8336,7 +8356,9 @@ Builtin_call_expression::do_get_backend(Translate_context* context)
case BUILTIN_PRINTLN:
{
const bool is_ln = this->code_ == BUILTIN_PRINTLN;
Expression* print_stmts = NULL;
Expression* print_stmts = Runtime::make_call(Runtime::PRINTLOCK,
location, 0);
const Expression_list* call_args = this->args();
if (call_args != NULL)
@ -8348,8 +8370,7 @@ Builtin_call_expression::do_get_backend(Translate_context* context)
if (is_ln && p != call_args->begin())
{
Expression* print_space =
Runtime::make_call(Runtime::PRINT_SPACE,
this->location(), 0);
Runtime::make_call(Runtime::PRINTSP, location, 0);
print_stmts =
Expression::make_compound(print_stmts, print_space,
@ -8360,51 +8381,51 @@ Builtin_call_expression::do_get_backend(Translate_context* context)
Type* type = arg->type();
Runtime::Function code;
if (type->is_string_type())
code = Runtime::PRINT_STRING;
code = Runtime::PRINTSTRING;
else if (type->integer_type() != NULL
&& type->integer_type()->is_unsigned())
{
Type* itype = Type::lookup_integer_type("uint64");
arg = Expression::make_cast(itype, arg, location);
code = Runtime::PRINT_UINT64;
code = Runtime::PRINTUINT;
}
else if (type->integer_type() != NULL)
{
Type* itype = Type::lookup_integer_type("int64");
arg = Expression::make_cast(itype, arg, location);
code = Runtime::PRINT_INT64;
code = Runtime::PRINTINT;
}
else if (type->float_type() != NULL)
{
Type* dtype = Type::lookup_float_type("float64");
arg = Expression::make_cast(dtype, arg, location);
code = Runtime::PRINT_DOUBLE;
code = Runtime::PRINTFLOAT;
}
else if (type->complex_type() != NULL)
{
Type* ctype = Type::lookup_complex_type("complex128");
arg = Expression::make_cast(ctype, arg, location);
code = Runtime::PRINT_COMPLEX;
code = Runtime::PRINTCOMPLEX;
}
else if (type->is_boolean_type())
code = Runtime::PRINT_BOOL;
code = Runtime::PRINTBOOL;
else if (type->points_to() != NULL
|| type->channel_type() != NULL
|| type->map_type() != NULL
|| type->function_type() != NULL)
{
arg = Expression::make_cast(type, arg, location);
code = Runtime::PRINT_POINTER;
code = Runtime::PRINTPOINTER;
}
else if (type->interface_type() != NULL)
{
if (type->interface_type()->is_empty())
code = Runtime::PRINT_EMPTY_INTERFACE;
code = Runtime::PRINTEFACE;
else
code = Runtime::PRINT_INTERFACE;
code = Runtime::PRINTIFACE;
}
else if (type->is_slice_type())
code = Runtime::PRINT_SLICE;
code = Runtime::PRINTSLICE;
else
{
go_assert(saw_errors());
@ -8412,30 +8433,22 @@ Builtin_call_expression::do_get_backend(Translate_context* context)
}
Expression* call = Runtime::make_call(code, location, 1, arg);
if (print_stmts == NULL)
print_stmts = call;
else
print_stmts = Expression::make_compound(print_stmts, call,
location);
print_stmts = Expression::make_compound(print_stmts, call,
location);
}
}
if (is_ln)
{
Expression* print_nl =
Runtime::make_call(Runtime::PRINT_NL, location, 0);
if (print_stmts == NULL)
print_stmts = print_nl;
else
print_stmts = Expression::make_compound(print_stmts, print_nl,
location);
Runtime::make_call(Runtime::PRINTNL, location, 0);
print_stmts = Expression::make_compound(print_stmts, print_nl,
location);
}
// There aren't any arguments to the print builtin. The compiler
// issues a warning for this so we should avoid getting the backend
// representation for this call. Instead, perform a no-op.
if (print_stmts == NULL)
return context->backend()->boolean_constant_expression(false);
Expression* unlock = Runtime::make_call(Runtime::PRINTUNLOCK,
location, 0);
print_stmts = Expression::make_compound(print_stmts, unlock, location);
return print_stmts->get_backend(context);
}

31
gcc/go/gofrontend/runtime.def
View file

@ -299,42 +299,47 @@ DEF_GO_RUNTIME(INTERFACE_EMPTY_COMPARE, "__go_interface_empty_compare",
P2(IFACE, EFACE), R1(INT))
// Lock the printer (for print/println).
DEF_GO_RUNTIME(PRINTLOCK, "runtime.printlock", P0(), R0())
// Unlock the printer (for print/println).
DEF_GO_RUNTIME(PRINTUNLOCK, "runtime.printunlock", P0(), R0())
// Print a string (for print/println).
DEF_GO_RUNTIME(PRINT_STRING, "__go_print_string", P1(STRING), R0())
DEF_GO_RUNTIME(PRINTSTRING, "runtime.printstring", P1(STRING), R0())
// Print a uint64 (for print/println).
DEF_GO_RUNTIME(PRINT_UINT64, "__go_print_uint64", P1(UINT64), R0())
DEF_GO_RUNTIME(PRINTUINT, "runtime.printuint", P1(UINT64), R0())
// Print a int64 (for print/println).
DEF_GO_RUNTIME(PRINT_INT64, "__go_print_int64", P1(INT64), R0())
DEF_GO_RUNTIME(PRINTINT, "runtime.printint", P1(INT64), R0())
// Print a float64 (for print/println).
DEF_GO_RUNTIME(PRINT_DOUBLE, "__go_print_double", P1(FLOAT64), R0())
DEF_GO_RUNTIME(PRINTFLOAT, "runtime.printfloat", P1(FLOAT64), R0())
// Print a complex128 (for print/println).
DEF_GO_RUNTIME(PRINT_COMPLEX, "__go_print_complex", P1(COMPLEX128), R0())
DEF_GO_RUNTIME(PRINTCOMPLEX, "runtime.printcomplex", P1(COMPLEX128), R0())
// Print a bool (for print/println).
DEF_GO_RUNTIME(PRINT_BOOL, "__go_print_bool", P1(BOOL), R0())
DEF_GO_RUNTIME(PRINTBOOL, "runtime.printbool", P1(BOOL), R0())
// Print a pointer/map/channel/function (for print/println).
DEF_GO_RUNTIME(PRINT_POINTER, "__go_print_pointer", P1(POINTER), R0())
DEF_GO_RUNTIME(PRINTPOINTER, "runtime.printpointer", P1(POINTER), R0())
// Print an empty interface (for print/println).
DEF_GO_RUNTIME(PRINT_EMPTY_INTERFACE, "__go_print_empty_interface",
P1(EFACE), R0())
DEF_GO_RUNTIME(PRINTEFACE, "runtime.printeface", P1(EFACE), R0())
// Print a non-empty interface (for print/println).
DEF_GO_RUNTIME(PRINT_INTERFACE, "__go_print_interface", P1(IFACE), R0())
DEF_GO_RUNTIME(PRINTIFACE, "runtime.printiface", P1(IFACE), R0())
// Print a slice (for print/println).
DEF_GO_RUNTIME(PRINT_SLICE, "__go_print_slice", P1(SLICE), R0())
DEF_GO_RUNTIME(PRINTSLICE, "runtime.printslice", P1(SLICE), R0())
// Print a space (for println).
DEF_GO_RUNTIME(PRINT_SPACE, "__go_print_space", P0(), R0())
DEF_GO_RUNTIME(PRINTSP, "runtime.printsp", P0(), R0())
// Print a newline (for println).
DEF_GO_RUNTIME(PRINT_NL, "__go_print_nl", P0(), R0())
DEF_GO_RUNTIME(PRINTNL, "runtime.printnl", P0(), R0())
// Used for field tracking for data analysis.

1
libgo/Makefile.am
View file

@ -474,7 +474,6 @@ runtime_files = \
runtime/go-new.c \
runtime/go-nosys.c \
runtime/go-panic.c \
runtime/go-print.c \
runtime/go-recover.c \
runtime/go-reflect-call.c \
runtime/go-rune.c \

11
libgo/Makefile.in
View file

@ -251,7 +251,7 @@ am__objects_6 = go-append.lo go-assert.lo go-assert-interface.lo \
go-interface-val-compare.lo go-make-slice.lo go-matherr.lo \
go-memclr.lo go-memcmp.lo go-memequal.lo go-memmove.lo \
go-nanotime.lo go-now.lo go-new.lo go-nosys.lo go-panic.lo \
go-print.lo go-recover.lo go-reflect-call.lo go-rune.lo \
go-recover.lo go-reflect-call.lo go-rune.lo \
go-runtime-error.lo go-setenv.lo go-signal.lo go-strcmp.lo \
go-string-to-byte-array.lo go-string-to-int-array.lo \
go-strplus.lo go-strslice.lo go-traceback.lo \
@ -875,7 +875,6 @@ runtime_files = \
runtime/go-new.c \
runtime/go-nosys.c \
runtime/go-panic.c \
runtime/go-print.c \
runtime/go-recover.c \
runtime/go-reflect-call.c \
runtime/go-rune.c \
@ -1600,7 +1599,6 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-nosys.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-now.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-panic.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-print.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-recover.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-reflect-call.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-rune.Plo@am__quote@
@ -1979,13 +1977,6 @@ go-panic.lo: runtime/go-panic.c
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o go-panic.lo `test -f 'runtime/go-panic.c' || echo '$(srcdir)/'`runtime/go-panic.c
go-print.lo: runtime/go-print.c
@am__fastdepCC_TRUE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT go-print.lo -MD -MP -MF $(DEPDIR)/go-print.Tpo -c -o go-print.lo `test -f 'runtime/go-print.c' || echo '$(srcdir)/'`runtime/go-print.c
@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/go-print.Tpo $(DEPDIR)/go-print.Plo
@AMDEP_TRUE@@am__fastdepCC_FALSE@ source='runtime/go-print.c' object='go-print.lo' libtool=yes @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o go-print.lo `test -f 'runtime/go-print.c' || echo '$(srcdir)/'`runtime/go-print.c
go-recover.lo: runtime/go-recover.c
@am__fastdepCC_TRUE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT go-recover.lo -MD -MP -MF $(DEPDIR)/go-recover.Tpo -c -o go-recover.lo `test -f 'runtime/go-recover.c' || echo '$(srcdir)/'`runtime/go-recover.c
@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/go-recover.Tpo $(DEPDIR)/go-recover.Plo

28
libgo/go/runtime/print.go
View file

@ -2,12 +2,32 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
package runtime
import "unsafe"
// For gccgo, use go:linkname to rename compiler-called functions to
// themselves, so that the compiler will export them.
//
//go:linkname printbool runtime.printbool
//go:linkname printfloat runtime.printfloat
//go:linkname printint runtime.printint
//go:linkname printhex runtime.printhex
//go:linkname printuint runtime.printuint
//go:linkname printcomplex runtime.printcomplex
//go:linkname printstring runtime.printstring
//go:linkname printpointer runtime.printpointer
//go:linkname printiface runtime.printiface
//go:linkname printeface runtime.printeface
//go:linkname printslice runtime.printslice
//go:linkname printnl runtime.printnl
//go:linkname printsp runtime.printsp
//go:linkname printlock runtime.printlock
//go:linkname printunlock runtime.printunlock
// Temporary for C code to call:
//go:linkname gwrite runtime.gwrite
//go:linkname printhex runtime.printhex
// The compiler knows that a print of a value of this type
// should use printhex instead of printuint (decimal).
type hex uint64
@ -201,10 +221,6 @@ func printpointer(p unsafe.Pointer) {
}
func printstring(s string) {
if uintptr(len(s)) > maxstring {
gwrite(bytes("[string too long]"))
return
}
gwrite(bytes(s))
}

22
libgo/go/runtime/runtime2.go
View file

@ -347,20 +347,14 @@ type g struct {
tracelastp puintptr // last P emitted an event for this goroutine
lockedm *m
sig uint32
// Temporary gccgo field.
writenbuf int32
// Not for gccgo yet: writebuf []byte
// Temporary different type for gccgo.
writebuf *byte
sigcode0 uintptr
sigcode1 uintptr
sigpc uintptr
gopc uintptr // pc of go statement that created this goroutine
startpc uintptr // pc of goroutine function
racectx uintptr
waiting *sudog // sudog structures this g is waiting on (that have a valid elem ptr); in lock order
writebuf []byte
sigcode0 uintptr
sigcode1 uintptr
sigpc uintptr
gopc uintptr // pc of go statement that created this goroutine
startpc uintptr // pc of goroutine function
racectx uintptr
waiting *sudog // sudog structures this g is waiting on (that have a valid elem ptr); in lock order
// Not for gccgo: cgoCtxt []uintptr // cgo traceback context
// Per-G GC state

3
libgo/go/runtime/stubs.go
View file

@ -445,6 +445,3 @@ func releaseSudog(s *sudog) {
// Temporary hack for gccgo until we port the garbage collector.
func typeBitsBulkBarrier(typ *_type, p, size uintptr) {}
// Temporary for gccgo until we port print.go.
type hex uint64

12
libgo/runtime/mprof.goc
View file

@ -419,17 +419,19 @@ func Stack(b Slice, all bool) (n int) {
n = 0;
else{
G* g = runtime_g();
g->writebuf = (byte*)b.__values;
g->writenbuf = b.__count;
g->writebuf.__values = b.__values;
g->writebuf.__count = 0;
g->writebuf.__capacity = b.__count;
USED(pc);
runtime_goroutineheader(g);
runtime_traceback();
runtime_printcreatedby(g);
if(all)
runtime_tracebackothers(g);
n = b.__count - g->writenbuf;
g->writebuf = nil;
g->writenbuf = 0;
n = g->writebuf.__count;
g->writebuf.__values = nil;
g->writebuf.__count = 0;
g->writebuf.__capacity = 0;
}
if(all) {

9
libgo/runtime/panic.c
View file

@ -72,9 +72,11 @@ __go_rundefer(void)
void
runtime_startpanic(void)
{
G *g;
M *m;
m = runtime_m();
g = runtime_g();
m = g->m;
if(runtime_mheap.cachealloc.size == 0) { // very early
runtime_printf("runtime: panic before malloc heap initialized\n");
m->mallocing = 1; // tell rest of panic not to try to malloc
@ -83,8 +85,9 @@ runtime_startpanic(void)
switch(m->dying) {
case 0:
m->dying = 1;
if(runtime_g() != nil)
runtime_g()->writebuf = nil;
g->writebuf.__values = nil;
g->writebuf.__count = 0;
g->writebuf.__capacity = 0;
runtime_xadd(&runtime_panicking, 1);
runtime_lock(&paniclk);
if(runtime_debug.schedtrace > 0 || runtime_debug.scheddetail > 0)

309
libgo/runtime/print.c
View file

@ -9,58 +9,60 @@
#include "array.h"
#include "go-type.h"
//static Lock debuglock;
extern void runtime_printlock(void)
__asm__(GOSYM_PREFIX "runtime.printlock");
extern void runtime_printunlock(void)
__asm__(GOSYM_PREFIX "runtime.printunlock");
extern void gwrite(Slice)
__asm__(GOSYM_PREFIX "runtime.gwrite");
extern void runtime_printint(int64)
__asm__(GOSYM_PREFIX "runtime.printint");
extern void runtime_printuint(uint64)
__asm__(GOSYM_PREFIX "runtime.printuint");
extern void runtime_printhex(uint64)
__asm__(GOSYM_PREFIX "runtime.printhex");
extern void runtime_printfloat(float64)
__asm__(GOSYM_PREFIX "runtime.printfloat");
extern void runtime_printcomplex(complex double)
__asm__(GOSYM_PREFIX "runtime.printcomplex");
extern void runtime_printbool(_Bool)
__asm__(GOSYM_PREFIX "runtime.printbool");
extern void runtime_printstring(String)
__asm__(GOSYM_PREFIX "runtime.printstring");
extern void runtime_printpointer(void *)
__asm__(GOSYM_PREFIX "runtime.printpointer");
extern void runtime_printslice(Slice)
__asm__(GOSYM_PREFIX "runtime.printslice");
extern void runtime_printeface(Eface)
__asm__(GOSYM_PREFIX "runtime.printeface");
extern void runtime_printiface(Iface)
__asm__(GOSYM_PREFIX "runtime.printiface");
// Clang requires this function to not be inlined (see below).
static void go_vprintf(const char*, va_list)
__attribute__((noinline));
// write to goroutine-local buffer if diverting output,
// or else standard error.
static void
gwrite(const void *v, intgo n)
{
G* g = runtime_g();
if(g == nil || g->writebuf == nil) {
// Avoid -D_FORTIFY_SOURCE problems.
int rv __attribute__((unused));
rv = runtime_write(2, v, n);
return;
}
if(g->writenbuf == 0)
return;
if(n > g->writenbuf)
n = g->writenbuf;
runtime_memmove(g->writebuf, v, n);
g->writebuf += n;
g->writenbuf -= n;
}
void
runtime_dump(byte *p, int32 n)
{
int32 i;
for(i=0; i<n; i++) {
runtime_printpointer((byte*)(uintptr)(p[i]>>4));
runtime_printpointer((byte*)(uintptr)(p[i]&0xf));
if((i&15) == 15)
runtime_prints("\n");
else
runtime_prints(" ");
}
if(n & 15)
runtime_prints("\n");
}
void
runtime_prints(const char *s)
{
gwrite(s, runtime_findnull((const byte*)s));
Slice sl;
// Use memcpy to avoid const-cast warning.
memcpy(&sl.__values, &s, sizeof(char*));
sl.__count = runtime_findnull((const byte*)s);
sl.__capacity = sl.__count;
gwrite(sl);
}
static void
runtime_printbyte(int8 c)
{
Slice sl;
sl.__values = &c;
sl.__count = 1;
sl.__capacity = 1;
gwrite(sl);
}
#if defined (__clang__) && (defined (__i386__) || defined (__x86_64__))
@ -104,15 +106,17 @@ runtime_snprintf(byte *buf, int32 n, const char *s, ...)
va_list va;
int32 m;
g->writebuf = buf;
g->writenbuf = n-1;
g->writebuf.__values = buf;
g->writebuf.__count = 0;
g->writebuf.__capacity = n-1;
va_start(va, s);
go_vprintf(s, va);
va_end(va);
*g->writebuf = '\0';
m = g->writebuf - buf;
g->writenbuf = 0;
g->writebuf = nil;
m = g->writebuf.__count;
((byte*)g->writebuf.__values)[m] = '\0';
g->writebuf.__values = nil;
g->writebuf.__count = 0;
g->writebuf.__capacity = 0;
return m;
}
@ -122,15 +126,21 @@ static void
go_vprintf(const char *s, va_list va)
{
const char *p, *lp;
Slice sl;
//runtime_lock(&debuglock);
runtime_printlock();
lp = p = s;
for(; *p; p++) {
if(*p != '%')
continue;
if(p > lp)
gwrite(lp, p-lp);
if(p > lp) {
// Use memcpy to avoid const-cast warning.
memcpy(&sl.__values, &lp, sizeof(char*));
sl.__count = p - lp;
sl.__capacity = p - lp;
gwrite(sl);
}
p++;
switch(*p) {
case 'a':
@ -181,192 +191,13 @@ go_vprintf(const char *s, va_list va)
}
lp = p+1;
}
if(p > lp)
gwrite(lp, p-lp);
//runtime_unlock(&debuglock);
}
void
runtime_printpc(void *p __attribute__ ((unused)))
{
runtime_prints("PC=");
runtime_printhex((uint64)(uintptr)runtime_getcallerpc(p));
}
void
runtime_printbool(_Bool v)
{
if(v) {
gwrite("true", 4);
return;
}
gwrite("false", 5);
}
void
runtime_printbyte(int8 c)
{
gwrite(&c, 1);
}
void
runtime_printfloat(double v)
{
byte buf[20];
int32 e, s, i, n;
float64 h;
if(ISNAN(v)) {
gwrite("NaN", 3);
return;
}
if(isinf(v)) {
if(signbit(v)) {
gwrite("-Inf", 4);
} else {
gwrite("+Inf", 4);
}
return;
if(p > lp) {
// Use memcpy to avoid const-cast warning.
memcpy(&sl.__values, &lp, sizeof(char*));
sl.__count = p - lp;
sl.__capacity = p - lp;
gwrite(sl);
}
n = 7; // digits printed
e = 0; // exp
s = 0; // sign
if(v == 0) {
if(isinf(1/v) && 1/v < 0)
s = 1;
} else {
// sign
if(v < 0) {
v = -v;
s = 1;
}
// normalize
while(v >= 10) {
e++;
v /= 10;
}
while(v < 1) {
e--;
v *= 10;
}
// round
h = 5;
for(i=0; i<n; i++)
h /= 10;
v += h;
if(v >= 10) {
e++;
v /= 10;
}
}
// format +d.dddd+edd
buf[0] = '+';
if(s)
buf[0] = '-';
for(i=0; i<n; i++) {
s = v;
buf[i+2] = s+'0';
v -= s;
v *= 10.;
}
buf[1] = buf[2];
buf[2] = '.';
buf[n+2] = 'e';
buf[n+3] = '+';
if(e < 0) {
e = -e;
buf[n+3] = '-';
}
buf[n+4] = (e/100) + '0';
buf[n+5] = (e/10)%10 + '0';
buf[n+6] = (e%10) + '0';
gwrite(buf, n+7);
}
void
runtime_printcomplex(complex double v)
{
gwrite("(", 1);
runtime_printfloat(creal(v));
runtime_printfloat(cimag(v));
gwrite("i)", 2);
}
void
runtime_printuint(uint64 v)
{
byte buf[100];
int32 i;
for(i=nelem(buf)-1; i>0; i--) {
buf[i] = v%10 + '0';
if(v < 10)
break;
v = v/10;
}
gwrite(buf+i, nelem(buf)-i);
}
void
runtime_printint(int64 v)
{
if(v < 0) {
gwrite("-", 1);
v = -v;
}
runtime_printuint(v);
}
void
runtime_printhex(uint64 v)
{
static const char *dig = "0123456789abcdef";
byte buf[100];
int32 i;
i=nelem(buf);
for(; v>0; v/=16)
buf[--i] = dig[v%16];
if(i == nelem(buf))
buf[--i] = '0';
buf[--i] = 'x';
buf[--i] = '0';
gwrite(buf+i, nelem(buf)-i);
}
void
runtime_printpointer(void *p)
{
runtime_printhex((uintptr)p);
}
void
runtime_printstring(String v)
{
// if(v.len > runtime_maxstring) {
// gwrite("[string too long]", 17);
// return;
// }
if(v.len > 0)
gwrite(v.str, v.len);
}
void
__go_print_space(void)
{
gwrite(" ", 1);
}
void
__go_print_nl(void)
{
gwrite("\n", 1);
runtime_printunlock();
}

5
libgo/runtime/proc.c
View file

@ -2037,8 +2037,9 @@ goexit0(G *gp)
gp->paniconfault = 0;
gp->_defer = nil; // should be true already but just in case.
gp->_panic = nil; // non-nil for Goexit during panic. points at stack-allocated data.
gp->writenbuf = 0;
gp->writebuf = nil;
gp->writebuf.__values = nil;
gp->writebuf.__count = 0;
gp->writebuf.__capacity = 0;
gp->waitreason = runtime_gostringnocopy(nil);
gp->param = nil;
m->curg = nil;

29
libgo/runtime/runtime.h
View file

@ -309,7 +309,6 @@ extern bool runtime_isarchive;
#define runtime_strstr(s1, s2) __builtin_strstr((s1), (s2))
intgo runtime_findnull(const byte*);
intgo runtime_findnullw(const uint16*);
void runtime_dump(byte*, int32);
void runtime_gogo(G*);
struct __go_func_type;
@ -324,7 +323,6 @@ void runtime_goenvs_unix(void)
void runtime_throw(const char*) __attribute__ ((noreturn));
void runtime_panicstring(const char*) __attribute__ ((noreturn));
bool runtime_canpanic(G*);
void runtime_prints(const char*);
void runtime_printf(const char*, ...);
int32 runtime_snprintf(byte*, int32, const char*, ...);
#define runtime_mcmp(a, b, s) __builtin_memcmp((a), (b), (s))
@ -533,36 +531,9 @@ void runtime_parforiters(ParFor*, uintptr, uintptr*, uintptr*);
void __wrap_rtems_task_variable_add(void **);
#endif
/*
* Names generated by gccgo.
*/
#define runtime_printbool __go_print_bool
#define runtime_printfloat __go_print_double
#define runtime_printint __go_print_int64
#define runtime_printiface __go_print_interface
#define runtime_printeface __go_print_empty_interface
#define runtime_printstring __go_print_string
#define runtime_printpointer __go_print_pointer
#define runtime_printuint __go_print_uint64
#define runtime_printslice __go_print_slice
#define runtime_printcomplex __go_print_complex
/*
* runtime go-called
*/
void runtime_printbool(_Bool);
void runtime_printbyte(int8);
void runtime_printfloat(double);
void runtime_printint(int64);
void runtime_printiface(Iface);
void runtime_printeface(Eface);
void runtime_printstring(String);
void runtime_printpc(void*);
void runtime_printpointer(void*);
void runtime_printuint(uint64);
void runtime_printhex(uint64);
void runtime_printslice(Slice);
void runtime_printcomplex(complex double);
void reflect_call(const struct __go_func_type *, FuncVal *, _Bool, _Bool,
void **, void **)
__asm__ (GOSYM_PREFIX "reflect.call");