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Make ext/objspace ASAN friendly

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ext/objspace iterates over the heap, but some slots in the heap are
poisoned, so we need to take care of that when running with ASAN
This commit is contained in:
Aaron Patterson 2020-09-25 14:50:54 -07:00 committed by Aaron Patterson
parent ac414139ec
commit 18b3f0f54c
Notes: git 2020-09-29 00:21:01 +09:00 
Merged: https://github.com/ruby/ruby/pull/3592
2 changed files with 44 additions and 0 deletions
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36
ext/objspace/objspace.c
View file

@ -18,6 +18,7 @@
#include "internal/compilers.h"
#include "internal/hash.h"
#include "internal/imemo.h"
#include "internal/sanitizers.h"
#include "node.h"
#include "ruby/io.h"
#include "ruby/re.h"
@ -58,6 +59,9 @@ total_i(void *vstart, void *vend, size_t stride, void *ptr)
struct total_data *data = (struct total_data *)ptr;
for (v = (VALUE)vstart; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags) {
switch (BUILTIN_TYPE(v)) {
case T_NONE:
@ -72,6 +76,10 @@ total_i(void *vstart, void *vend, size_t stride, void *ptr)
}
}
}
if (ptr) {
asan_poison_object(v);
}
}
return 0;
@ -155,9 +163,16 @@ cos_i(void *vstart, void *vend, size_t stride, void *data)
VALUE v = (VALUE)vstart;
for (;v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags) {
counts[BUILTIN_TYPE(v)] += rb_obj_memsize_of(v);
}
if (ptr) {
asan_poison_object(v);
}
}
return 0;
}
@ -261,6 +276,9 @@ cs_i(void *vstart, void *vend, size_t stride, void *n)
VALUE v = (VALUE)vstart;
for (; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags && BUILTIN_TYPE(v) == T_SYMBOL) {
ID id = RSYMBOL(v)->id;
if ((id & ~ID_SCOPE_MASK) == 0) {
@ -270,6 +288,10 @@ cs_i(void *vstart, void *vend, size_t stride, void *n)
counts->immortal++;
}
}
if (ptr) {
asan_poison_object(v);
}
}
return 0;
@ -500,6 +522,9 @@ cto_i(void *vstart, void *vend, size_t stride, void *data)
VALUE v = (VALUE)vstart;
for (; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags && BUILTIN_TYPE(v) == T_DATA) {
VALUE counter;
VALUE key = RBASIC(v)->klass;
@ -520,6 +545,10 @@ cto_i(void *vstart, void *vend, size_t stride, void *data)
rb_hash_aset(hash, key, counter);
}
if (ptr) {
asan_poison_object(v);
}
}
return 0;
@ -574,6 +603,9 @@ count_imemo_objects_i(void *vstart, void *vend, size_t stride, void *data)
VALUE v = (VALUE)vstart;
for (; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags && BUILTIN_TYPE(v) == T_IMEMO) {
VALUE counter;
VALUE key = ID2SYM(imemo_type_ids[imemo_type(v)]);
@ -589,6 +621,10 @@ count_imemo_objects_i(void *vstart, void *vend, size_t stride, void *data)
rb_hash_aset(hash, key, counter);
}
if (ptr) {
asan_poison_object(v);
}
}
return 0;

8
ext/objspace/objspace_dump.c
View file

@ -16,6 +16,7 @@
#include "internal.h"
#include "internal/hash.h"
#include "internal/string.h"
#include "internal/sanitizers.h"
#include "node.h"
#include "objspace.h"
#include "ruby/debug.h"
@ -508,8 +509,15 @@ heap_i(void *vstart, void *vend, size_t stride, void *data)
struct dump_config *dc = (struct dump_config *)data;
VALUE v = (VALUE)vstart;
for (; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (dc->full_heap || RBASIC(v)->flags)
dump_object(v, dc);
if (ptr) {
asan_poison_object(v);
}
}
return 0;
}