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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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28
hotspot/src/os/solaris/dtrace/libjvm_db.c
View file

@ -148,9 +148,11 @@ struct jvm_agent {
uint64_t Universe_methodKlassObj_address;
uint64_t CodeCache_heap_address;
uint64_t Universe_heap_base_address;
/* Volatiles */
uint64_t Universe_methodKlassObj;
uint64_t Universe_heap_base;
uint64_t CodeCache_low;
uint64_t CodeCache_high;
uint64_t CodeCache_segmap_low;
@ -166,7 +168,6 @@ struct jvm_agent {
Frame_t curr_fr;
};
static int
read_string(struct ps_prochandle *P,
char *buf, /* caller's buffer */
@ -185,6 +186,14 @@ read_string(struct ps_prochandle *P,
return -1;
}
static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) {
int err = -1;
uint32_t ptr32;
err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t));
*ptr = ptr32;
return err;
}
static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) {
int err = -1;
uint32_t ptr32;
@ -270,6 +279,9 @@ static int parse_vmstructs(jvm_agent_t* J) {
if (strcmp("_methodKlassObj", vmp->fieldName) == 0) {
J->Universe_methodKlassObj_address = vmp->address;
}
if (strcmp("_heap_base", vmp->fieldName) == 0) {
J->Universe_heap_base_address = vmp->address;
}
}
CHECK_FAIL(err);
@ -292,6 +304,8 @@ static int read_volatiles(jvm_agent_t* J) {
err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj);
CHECK_FAIL(err);
err = read_pointer(J, J->Universe_heap_base_address, &J->Universe_heap_base);
CHECK_FAIL(err);
err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
OFFSET_VirtualSpace_low, &J->CodeCache_low);
CHECK_FAIL(err);
@ -444,7 +458,17 @@ void Jagent_destroy(jvm_agent_t *J) {
static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) {
uint64_t klass;
int err;
err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_klass, &klass);
// If heap_base is nonnull, this was a compressed oop.
if (J->Universe_heap_base != NULL) {
uint32_t cklass;
err = read_compressed_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata,
&cklass);
// decode heap oop, same as oop.inline.hpp
klass = (uint64_t)((uintptr_t)J->Universe_heap_base +
((uintptr_t)cklass << 3));
} else {
err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, &klass);
}
if (err != PS_OK) goto fail;
return klass == J->Universe_methodKlassObj;