gcc/libgo/runtime/go-runtime-error.c
Ian Lance Taylor 43055d2379 compiler, runtime: implement shifts by signed amounts
Shifting by signed types is a new language feature in Go 1.13.
    
    This requires a patch to the testsuite.
    
    Updates 
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/190977

	* go.test/test/fixedbugs/bug073.go: Update for language changes.

From-SVN: r274755
2019-08-20 21:15:46 +00:00

125 lines
3.5 KiB
C

/* go-runtime-error.c -- Go runtime error.
Copyright 2010 The Go Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file. */
#include "runtime.h"
/* The compiler generates calls to this function. This enum values
are known to the compiler and used by compiled code. Any change
here must be reflected in the compiler. */
enum
{
/* Slice index out of bounds: negative or larger than the length of
the slice. */
SLICE_INDEX_OUT_OF_BOUNDS = 0,
/* Array index out of bounds. */
ARRAY_INDEX_OUT_OF_BOUNDS = 1,
/* String index out of bounds. */
STRING_INDEX_OUT_OF_BOUNDS = 2,
/* Slice slice out of bounds: negative or larger than the length of
the slice or high bound less than low bound. */
SLICE_SLICE_OUT_OF_BOUNDS = 3,
/* Array slice out of bounds. */
ARRAY_SLICE_OUT_OF_BOUNDS = 4,
/* String slice out of bounds. */
STRING_SLICE_OUT_OF_BOUNDS = 5,
/* Dereference of nil pointer. This is used when there is a
dereference of a pointer to a very large struct or array, to
ensure that a gigantic array is not used a proxy to access random
memory locations. */
NIL_DEREFERENCE = 6,
/* Slice length out of bounds in make: negative or overflow or length
greater than capacity. */
MAKE_SLICE_LEN_OUT_OF_BOUNDS = 7,
/* Slice capacity out of bounds in make: negative. */
MAKE_SLICE_CAP_OUT_OF_BOUNDS = 8,
/* Map capacity out of bounds in make: negative or overflow. */
MAKE_MAP_OUT_OF_BOUNDS = 9,
/* Channel capacity out of bounds in make: negative or overflow. */
MAKE_CHAN_OUT_OF_BOUNDS = 10,
/* Integer division by zero. */
DIVISION_BY_ZERO = 11,
/* Go statement with nil function. */
GO_NIL = 12,
/* Shift by negative value. */
SHIFT_BY_NEGATIVE = 13
};
extern void __go_runtime_error (int32) __attribute__ ((noreturn));
void
__go_runtime_error (int32 i)
{
struct funcfileline_return fileline;
bool in_runtime;
fileline = runtime_funcfileline ((uintptr) runtime_getcallerpc()-1, 0);
in_runtime = (fileline.retfn.len > 0
&& (__builtin_strncmp ((const char *) fileline.retfn.str,
"runtime.", 8)
== 0));
switch (i)
{
case SLICE_INDEX_OUT_OF_BOUNDS:
case ARRAY_INDEX_OUT_OF_BOUNDS:
case STRING_INDEX_OUT_OF_BOUNDS:
if (in_runtime)
runtime_throw ("index out of range");
runtime_panicstring ("index out of range");
case SLICE_SLICE_OUT_OF_BOUNDS:
case ARRAY_SLICE_OUT_OF_BOUNDS:
case STRING_SLICE_OUT_OF_BOUNDS:
if (in_runtime)
runtime_throw ("slice bounds out of range");
runtime_panicstring ("slice bounds out of range");
case NIL_DEREFERENCE:
runtime_panicstring ("nil pointer dereference");
case MAKE_SLICE_LEN_OUT_OF_BOUNDS:
runtime_panicstring ("make slice len out of range");
case MAKE_SLICE_CAP_OUT_OF_BOUNDS:
runtime_panicstring ("make slice cap out of range");
case MAKE_MAP_OUT_OF_BOUNDS:
runtime_panicstring ("make map len out of range");
case MAKE_CHAN_OUT_OF_BOUNDS:
runtime_panicstring ("make chan len out of range");
case DIVISION_BY_ZERO:
runtime_panicstring ("integer divide by zero");
case GO_NIL:
/* This one is a throw, rather than a panic. Set throwing to
not dump full stacks. */
runtime_g()->m->throwing = -1;
runtime_throw ("go of nil func value");
case SHIFT_BY_NEGATIVE:
runtime_panicstring ("negative shift amount");
default:
runtime_panicstring ("unknown runtime error");
}
}