8028471: PPC64 (part 215): opto: Extend ImplicitNullCheck optimization.
Summary: Fixed Implicit NULL check optimization for AIX, where the page at address '0' is only write-protected.
Reviewed-by: kvn
/*
* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef HPROF_B_SPEC_H
#define HPROF_B_SPEC_H
/* Hprof binary format enums and spec. */
/* Need to #define or typedef HprofId before including this file.
* hprof used ObjectIndex or 4 bytes, but it can be 4 or 8 byte type.
*/
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
/*
* hprof binary format: (result either written to a file or sent over
* the network).
*
* WARNING: This format is still under development, and is subject to
* change without notice.
*
* header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" (0-terminated)
* u4 size of identifiers. Identifiers are used to represent
* UTF8 strings, objects, stack traces, etc. They usually
* have the same size as host pointers. For example, on
* Solaris and Win32, the size is 4.
* u4 high word
* u4 low word number of milliseconds since 0:00 GMT, 1/1/70
* [record]* a sequence of records.
*/
/*
* Record format:
*
* u1 a TAG denoting the type of the record
* u4 number of *microseconds* since the time stamp in the
* header. (wraps around in a little more than an hour)
* u4 number of bytes *remaining* in the record. Note that
* this number excludes the tag and the length field itself.
* [u1]* BODY of the record (a sequence of bytes)
*/
/*
* The following TAGs are supported:
*
* TAG BODY notes
*----------------------------------------------------------
* HPROF_UTF8 a UTF8-encoded name
*
* id name ID
* [u1]* UTF8 characters (no trailing zero)
*
* HPROF_LOAD_CLASS a newly loaded class
*
* u4 class serial number (> 0)
* id class object ID
* u4 stack trace serial number
* id class name ID
*
* HPROF_UNLOAD_CLASS an unloading class
*
* u4 class serial_number
*
* HPROF_FRAME a Java stack frame
*
* id stack frame ID
* id method name ID
* id method signature ID
* id source file name ID
* u4 class serial number
* i4 line number. >0: normal
* -1: unknown
* -2: compiled method
* -3: native method
*
* HPROF_TRACE a Java stack trace
*
* u4 stack trace serial number
* u4 thread serial number
* u4 number of frames
* [id]* stack frame IDs
*
*
* HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC
*
* u2 flags 0x0001: incremental vs. complete
* 0x0002: sorted by allocation vs. live
* 0x0004: whether to force a GC
* u4 cutoff ratio
* u4 total live bytes
* u4 total live instances
* u8 total bytes allocated
* u8 total instances allocated
* u4 number of sites that follow
* [u1 is_array: 0: normal object
* 2: object array
* 4: boolean array
* 5: char array
* 6: float array
* 7: double array
* 8: byte array
* 9: short array
* 10: int array
* 11: long array
* u4 class serial number (may be zero during startup)
* u4 stack trace serial number
* u4 number of bytes alive
* u4 number of instances alive
* u4 number of bytes allocated
* u4]* number of instance allocated
*
* HPROF_START_THREAD a newly started thread.
*
* u4 thread serial number (> 0)
* id thread object ID
* u4 stack trace serial number
* id thread name ID
* id thread group name ID
* id thread group parent name ID
*
* HPROF_END_THREAD a terminating thread.
*
* u4 thread serial number
*
* HPROF_HEAP_SUMMARY heap summary
*
* u4 total live bytes
* u4 total live instances
* u8 total bytes allocated
* u8 total instances allocated
*
* HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT denote a heap dump
*
* [heap dump sub-records]*
*
* There are four kinds of heap dump sub-records:
*
* u1 sub-record type
*
* HPROF_GC_ROOT_UNKNOWN unknown root
*
* id object ID
*
* HPROF_GC_ROOT_THREAD_OBJ thread object
*
* id thread object ID (may be 0 for a
* thread newly attached through JNI)
* u4 thread sequence number
* u4 stack trace sequence number
*
* HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root
*
* id object ID
* id JNI global ref ID
*
* HPROF_GC_ROOT_JNI_LOCAL JNI local ref
*
* id object ID
* u4 thread serial number
* u4 frame # in stack trace (-1 for empty)
*
* HPROF_GC_ROOT_JAVA_FRAME Java stack frame
*
* id object ID
* u4 thread serial number
* u4 frame # in stack trace (-1 for empty)
*
* HPROF_GC_ROOT_NATIVE_STACK Native stack
*
* id object ID
* u4 thread serial number
*
* HPROF_GC_ROOT_STICKY_CLASS System class
*
* id object ID
*
* HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block
*
* id object ID
* u4 thread serial number
*
* HPROF_GC_ROOT_MONITOR_USED Busy monitor
*
* id object ID
*
* HPROF_GC_CLASS_DUMP dump of a class object
*
* id class object ID
* u4 stack trace serial number
* id super class object ID
* id class loader object ID
* id signers object ID
* id protection domain object ID
* id reserved
* id reserved
*
* u4 instance size (in bytes)
*
* u2 size of constant pool
* [u2, constant pool index,
* ty, type
* 2: object
* 4: boolean
* 5: char
* 6: float
* 7: double
* 8: byte
* 9: short
* 10: int
* 11: long
* vl]* and value
*
* u2 number of static fields
* [id, static field name,
* ty, type,
* vl]* and value
*
* u2 number of inst. fields (not inc. super)
* [id, instance field name,
* ty]* type
*
* HPROF_GC_INSTANCE_DUMP dump of a normal object
*
* id object ID
* u4 stack trace serial number
* id class object ID
* u4 number of bytes that follow
* [vl]* instance field values (class, followed
* by super, super's super ...)
*
* HPROF_GC_OBJ_ARRAY_DUMP dump of an object array
*
* id array object ID
* u4 stack trace serial number
* u4 number of elements
* id array class ID
* [id]* elements
*
* HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array
*
* id array object ID
* u4 stack trace serial number
* u4 number of elements
* u1 element type
* 4: boolean array
* 5: char array
* 6: float array
* 7: double array
* 8: byte array
* 9: short array
* 10: int array
* 11: long array
* [u1]* elements
*
* HPROF_HEAP_DUMP_END terminates series of heap dump segments
*
* HPROF_CPU_SAMPLES a set of sample traces of running threads
*
* u4 total number of samples
* u4 # of traces
* [u4 # of samples
* u4]* stack trace serial number
*
* HPROF_CONTROL_SETTINGS the settings of on/off switches
*
* u4 0x00000001: alloc traces on/off
* 0x00000002: cpu sampling on/off
* u2 stack trace depth
*
*/
typedef enum HprofTag {
HPROF_UTF8 = 0x01,
HPROF_LOAD_CLASS = 0x02,
HPROF_UNLOAD_CLASS = 0x03,
HPROF_FRAME = 0x04,
HPROF_TRACE = 0x05,
HPROF_ALLOC_SITES = 0x06,
HPROF_HEAP_SUMMARY = 0x07,
HPROF_START_THREAD = 0x0A,
HPROF_END_THREAD = 0x0B,
HPROF_HEAP_DUMP = 0x0C,
HPROF_HEAP_DUMP_SEGMENT = 0x1C, /* 1.0.2 only */
HPROF_HEAP_DUMP_END = 0x2C, /* 1.0.2 only */
HPROF_CPU_SAMPLES = 0x0D,
HPROF_CONTROL_SETTINGS = 0x0E
} HprofTag;
/*
* Heap dump constants
*/
typedef enum HprofGcTag {
HPROF_GC_ROOT_UNKNOWN = 0xFF,
HPROF_GC_ROOT_JNI_GLOBAL = 0x01,
HPROF_GC_ROOT_JNI_LOCAL = 0x02,
HPROF_GC_ROOT_JAVA_FRAME = 0x03,
HPROF_GC_ROOT_NATIVE_STACK = 0x04,
HPROF_GC_ROOT_STICKY_CLASS = 0x05,
HPROF_GC_ROOT_THREAD_BLOCK = 0x06,
HPROF_GC_ROOT_MONITOR_USED = 0x07,
HPROF_GC_ROOT_THREAD_OBJ = 0x08,
HPROF_GC_CLASS_DUMP = 0x20,
HPROF_GC_INSTANCE_DUMP = 0x21,
HPROF_GC_OBJ_ARRAY_DUMP = 0x22,
HPROF_GC_PRIM_ARRAY_DUMP = 0x23
} HprofGcTag;
enum HprofType {
HPROF_ARRAY_OBJECT = 1,
HPROF_NORMAL_OBJECT = 2,
HPROF_BOOLEAN = 4,
HPROF_CHAR = 5,
HPROF_FLOAT = 6,
HPROF_DOUBLE = 7,
HPROF_BYTE = 8,
HPROF_SHORT = 9,
HPROF_INT = 10,
HPROF_LONG = 11
};
typedef unsigned char HprofType;
#define HPROF_TYPE_SIZES \
{ \
/*Object?*/ sizeof(HprofId), \
/*Object?*/ sizeof(HprofId), \
/*Array*/ sizeof(HprofId), \
/*Object?*/ sizeof(HprofId), \
/*jboolean*/ 1, \
/*jchar*/ 2, \
/*jfloat*/ 4, \
/*jdouble*/ 8, \
/*jbyte*/ 1, \
/*jshort*/ 2, \
/*jint*/ 4, \
/*jlong*/ 8 \
}
#define HPROF_TYPE_IS_PRIMITIVE(ty) ((ty)>=HPROF_BOOLEAN)
#endif