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-rw-r--r--runtime/arch/arm/entrypoints_init_arm.cc2
-rw-r--r--runtime/arch/arm/quick_entrypoints_arm.S110
-rw-r--r--runtime/arch/arm64/entrypoints_init_arm64.cc2
-rw-r--r--runtime/arch/arm64/quick_entrypoints_arm64.S2
-rw-r--r--runtime/dex2oat_environment_test.h15
-rw-r--r--runtime/gc/space/image_space_fs.h9
-rw-r--r--runtime/oat_file_assistant.cc16
-rw-r--r--runtime/utils.cc46
-rw-r--r--runtime/utils.h7
-rw-r--r--runtime/utils_test.cc6
10 files changed, 89 insertions, 126 deletions
diff --git a/runtime/arch/arm/entrypoints_init_arm.cc b/runtime/arch/arm/entrypoints_init_arm.cc
index 0e2a6720ae..492a12d02b 100644
--- a/runtime/arch/arm/entrypoints_init_arm.cc
+++ b/runtime/arch/arm/entrypoints_init_arm.cc
@@ -133,7 +133,7 @@ void InitEntryPoints(JniEntryPoints* jpoints, QuickEntryPoints* qpoints) {
qpoints->pReadBarrierMarkReg09 = art_quick_read_barrier_mark_reg09;
qpoints->pReadBarrierMarkReg10 = art_quick_read_barrier_mark_reg10;
qpoints->pReadBarrierMarkReg11 = art_quick_read_barrier_mark_reg11;
- qpoints->pReadBarrierMarkReg12 = art_quick_read_barrier_mark_reg12;
+ qpoints->pReadBarrierMarkReg12 = nullptr; // Cannot use register 12 (IP) to pass arguments.
qpoints->pReadBarrierMarkReg13 = nullptr; // Cannot use register 13 (SP) to pass arguments.
qpoints->pReadBarrierMarkReg14 = nullptr; // Cannot use register 14 (LR) to pass arguments.
qpoints->pReadBarrierMarkReg15 = nullptr; // Cannot use register 15 (PC) to pass arguments.
diff --git a/runtime/arch/arm/quick_entrypoints_arm.S b/runtime/arch/arm/quick_entrypoints_arm.S
index 3d0da8075d..c4ec72685f 100644
--- a/runtime/arch/arm/quick_entrypoints_arm.S
+++ b/runtime/arch/arm/quick_entrypoints_arm.S
@@ -1246,9 +1246,15 @@ ENTRY art_quick_alloc_object_region_tlab
ldr r2, [r2, r0, lsl #COMPRESSED_REFERENCE_SIZE_SHIFT]
// Read barrier for class load.
ldr r3, [r9, #THREAD_IS_GC_MARKING_OFFSET]
- cbnz r3, .Lart_quick_alloc_object_region_tlab_class_load_read_barrier_slow_path
+ cbnz r3, .Lart_quick_alloc_object_region_tlab_class_load_read_barrier_marking
.Lart_quick_alloc_object_region_tlab_class_load_read_barrier_slow_path_exit:
ALLOC_OBJECT_TLAB_FAST_PATH .Lart_quick_alloc_object_region_tlab_slow_path
+.Lart_quick_alloc_object_region_tlab_class_load_read_barrier_marking:
+ cbz r2, .Lart_quick_alloc_object_region_tlab_slow_path // Null check for loading lock word.
+ // Check lock word for mark bit, if marked do the allocation.
+ ldr r3, [r2, MIRROR_OBJECT_LOCK_WORD_OFFSET]
+ ands r3, #LOCK_WORD_MARK_BIT_MASK_SHIFTED
+ bne .Lart_quick_alloc_object_region_tlab_class_load_read_barrier_slow_path_exit
.Lart_quick_alloc_object_region_tlab_class_load_read_barrier_slow_path:
// The read barrier slow path. Mark
// the class.
@@ -1817,6 +1823,39 @@ ENTRY art_quick_l2f
pop {pc}
END art_quick_l2f
+.macro CONDITIONAL_CBZ reg, reg_if, dest
+.ifc \reg, \reg_if
+ cbz \reg, \dest
+.endif
+.endm
+
+.macro CONDITIONAL_CMPBZ reg, reg_if, dest
+.ifc \reg, \reg_if
+ cmp \reg, #0
+ beq \dest
+.endif
+.endm
+
+// Use CBZ if the register is in {r0, r7} otherwise compare and branch.
+.macro SMART_CBZ reg, dest
+ CONDITIONAL_CBZ \reg, r0, \dest
+ CONDITIONAL_CBZ \reg, r1, \dest
+ CONDITIONAL_CBZ \reg, r2, \dest
+ CONDITIONAL_CBZ \reg, r3, \dest
+ CONDITIONAL_CBZ \reg, r4, \dest
+ CONDITIONAL_CBZ \reg, r5, \dest
+ CONDITIONAL_CBZ \reg, r6, \dest
+ CONDITIONAL_CBZ \reg, r7, \dest
+ CONDITIONAL_CMPBZ \reg, r8, \dest
+ CONDITIONAL_CMPBZ \reg, r9, \dest
+ CONDITIONAL_CMPBZ \reg, r10, \dest
+ CONDITIONAL_CMPBZ \reg, r11, \dest
+ CONDITIONAL_CMPBZ \reg, r12, \dest
+ CONDITIONAL_CMPBZ \reg, r13, \dest
+ CONDITIONAL_CMPBZ \reg, r14, \dest
+ CONDITIONAL_CMPBZ \reg, r15, \dest
+.endm
+
/*
* Create a function `name` calling the ReadBarrier::Mark routine,
* getting its argument and returning its result through register
@@ -1835,28 +1874,25 @@ END art_quick_l2f
.macro READ_BARRIER_MARK_REG name, reg
ENTRY \name
// Null check so that we can load the lock word.
- cmp \reg, #0
- beq .Lret_rb_\name
- // Check lock word for mark bit, if marked return.
- push {r0}
- ldr r0, [\reg, MIRROR_OBJECT_LOCK_WORD_OFFSET]
- and r0, #LOCK_WORD_MARK_BIT_MASK_SHIFTED
- cbz r0, .Lslow_rb_\name
- // Restore LR and return.
- pop {r0}
- bx lr
+ SMART_CBZ \reg, .Lret_rb_\name
+ // Check lock word for mark bit, if marked return. Use IP for scratch since it is blocked.
+ ldr ip, [\reg, MIRROR_OBJECT_LOCK_WORD_OFFSET]
+ ands ip, #LOCK_WORD_MARK_BIT_MASK_SHIFTED
+ beq .Lslow_rb_\name
+ // Already marked, return right away.
+ bx lr
.Lslow_rb_\name:
- pop {r0}
- push {r0-r4, r9, r12, lr} @ save return address and core caller-save registers
+ push {r0-r5, r9, lr} @ save return address and core caller-save registers
+ @ also save callee save r5 for 16 byte alignment
.cfi_adjust_cfa_offset 32
.cfi_rel_offset r0, 0
.cfi_rel_offset r1, 4
.cfi_rel_offset r2, 8
.cfi_rel_offset r3, 12
.cfi_rel_offset r4, 16
- .cfi_rel_offset r9, 20
- .cfi_rel_offset r12, 24
+ .cfi_rel_offset r5, 20
+ .cfi_rel_offset r9, 24
.cfi_rel_offset lr, 28
vpush {s0-s15} @ save floating-point caller-save registers
.cfi_adjust_cfa_offset 64
@@ -1865,48 +1901,11 @@ ENTRY \name
mov r0, \reg @ pass arg1 - obj from `reg`
.endif
bl artReadBarrierMark @ r0 <- artReadBarrierMark(obj)
-
+ mov ip, r0 @ Save result in IP
vpop {s0-s15} @ restore floating-point registers
.cfi_adjust_cfa_offset -64
- @ If `reg` is a caller-save register, save the result to its
- @ corresponding stack slot; it will be restored by the "pop"
- @ instruction below. Otherwise, move result into `reg`.
- @
- @ (Note that saving `reg` to its stack slot will overwrite the value
- @ previously stored by the "push" instruction above. That is
- @ alright, as in that case we know that `reg` is not a live
- @ register, as it is used to pass the argument and return the result
- @ of this function.)
- .ifc \reg, r0
- PUSH_REG r0, 0 @ copy result to r0's stack location
- .else
- .ifc \reg, r1
- PUSH_REG r0, 4 @ copy result to r1's stack location
- .else
- .ifc \reg, r2
- PUSH_REG r0, 8 @ copy result to r2's stack location
- .else
- .ifc \reg, r3
- PUSH_REG r0, 12 @ copy result to r3's stack location
- .else
- .ifc \reg, r4
- PUSH_REG r0, 16 @ copy result to r4's stack location
- .else
- .ifc \reg, r9
- PUSH_REG r0, 20 @ copy result to r9's stack location
- .else
- .ifc \reg, r12
- PUSH_REG r0, 24 @ copy result to r12's stack location
- .else
- mov \reg, r0 @ return result into `reg`
- .endif
- .endif
- .endif
- .endif
- .endif
- .endif
- .endif
- pop {r0-r4, r9, r12, pc} @ restore caller-save registers and return
+ pop {r0-r5, r9, lr} @ restore caller-save registers
+ mov \reg, ip @ copy result to reg
.Lret_rb_\name:
bx lr
END \name
@@ -1924,4 +1923,3 @@ READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg08, r8
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg09, r9
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg10, r10
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg11, r11
-READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg12, r12
diff --git a/runtime/arch/arm64/entrypoints_init_arm64.cc b/runtime/arch/arm64/entrypoints_init_arm64.cc
index cc5bf29609..55b09c318c 100644
--- a/runtime/arch/arm64/entrypoints_init_arm64.cc
+++ b/runtime/arch/arm64/entrypoints_init_arm64.cc
@@ -149,7 +149,7 @@ void InitEntryPoints(JniEntryPoints* jpoints, QuickEntryPoints* qpoints) {
qpoints->pReadBarrierMarkReg13 = art_quick_read_barrier_mark_reg13;
qpoints->pReadBarrierMarkReg14 = art_quick_read_barrier_mark_reg14;
qpoints->pReadBarrierMarkReg15 = art_quick_read_barrier_mark_reg15;
- qpoints->pReadBarrierMarkReg16 = art_quick_read_barrier_mark_reg16;
+ qpoints->pReadBarrierMarkReg16 = nullptr; // IP0 is used as a temp by the asm stub.
qpoints->pReadBarrierMarkReg17 = art_quick_read_barrier_mark_reg17;
qpoints->pReadBarrierMarkReg18 = art_quick_read_barrier_mark_reg18;
qpoints->pReadBarrierMarkReg19 = art_quick_read_barrier_mark_reg19;
diff --git a/runtime/arch/arm64/quick_entrypoints_arm64.S b/runtime/arch/arm64/quick_entrypoints_arm64.S
index 35f5c56282..4289cabbc6 100644
--- a/runtime/arch/arm64/quick_entrypoints_arm64.S
+++ b/runtime/arch/arm64/quick_entrypoints_arm64.S
@@ -2751,7 +2751,7 @@ READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg12, w12, x12
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg13, w13, x13
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg14, w14, x14
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg15, w15, x15
-READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg16, w16, x16
+// READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg16, w16, x16 ip0 is blocked
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg17, w17, x17
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg18, w18, x18
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg19, w19, x19
diff --git a/runtime/dex2oat_environment_test.h b/runtime/dex2oat_environment_test.h
index 743fbb9c68..d717ec0fcb 100644
--- a/runtime/dex2oat_environment_test.h
+++ b/runtime/dex2oat_environment_test.h
@@ -137,7 +137,20 @@ class Dex2oatEnvironmentTest : public CommonRuntimeTest {
}
bool GetCachedImageFile(/*out*/std::string* image, std::string* error_msg) const {
- std::string cache = GetDalvikCache(GetInstructionSetString(kRuntimeISA), true);
+ std::string cache;
+ bool have_android_data;
+ bool dalvik_cache_exists;
+ bool is_global_cache;
+ GetDalvikCache(GetInstructionSetString(kRuntimeISA),
+ true,
+ &cache,
+ &have_android_data,
+ &dalvik_cache_exists,
+ &is_global_cache);
+ if (!dalvik_cache_exists) {
+ *error_msg = "Failed to create dalvik cache";
+ return false;
+ }
return GetDalvikCacheFilename(GetImageLocation().c_str(), cache.c_str(), image, error_msg);
}
diff --git a/runtime/gc/space/image_space_fs.h b/runtime/gc/space/image_space_fs.h
index fc9a3cfed5..fa941c0376 100644
--- a/runtime/gc/space/image_space_fs.h
+++ b/runtime/gc/space/image_space_fs.h
@@ -89,9 +89,11 @@ static void DeleteDirectoryContents(const std::string& dir, bool recurse) {
static void PruneDalvikCache(InstructionSet isa) {
CHECK_NE(isa, kNone);
// Prune the base /data/dalvik-cache.
- impl::DeleteDirectoryContents(GetDalvikCacheOrDie(".", false), false);
+ // Note: GetDalvikCache may return the empty string if the directory doesn't
+ // exist. It is safe to pass "" to DeleteDirectoryContents, so this is okay.
+ impl::DeleteDirectoryContents(GetDalvikCache("."), false);
// Prune /data/dalvik-cache/<isa>.
- impl::DeleteDirectoryContents(GetDalvikCacheOrDie(GetInstructionSetString(isa), false), false);
+ impl::DeleteDirectoryContents(GetDalvikCache(GetInstructionSetString(isa)), false);
// Be defensive. There should be a runtime created here, but this may be called in a test.
if (Runtime::Current() != nullptr) {
@@ -104,7 +106,8 @@ static void PruneDalvikCache(InstructionSet isa) {
// present, it usually means the boot didn't complete. We wipe the entire dalvik
// cache if that's the case.
static void MarkZygoteStart(const InstructionSet isa, const uint32_t max_failed_boots) {
- const std::string isa_subdir = GetDalvikCacheOrDie(GetInstructionSetString(isa), false);
+ const std::string isa_subdir = GetDalvikCache(GetInstructionSetString(isa));
+ CHECK(!isa_subdir.empty()) << "Dalvik cache not found";
const std::string boot_marker = isa_subdir + "/.booting";
const char* file_name = boot_marker.c_str();
diff --git a/runtime/oat_file_assistant.cc b/runtime/oat_file_assistant.cc
index c1901587df..fe6332dee2 100644
--- a/runtime/oat_file_assistant.cc
+++ b/runtime/oat_file_assistant.cc
@@ -713,21 +713,15 @@ bool OatFileAssistant::DexLocationToOatFilename(const std::string& location,
CHECK(oat_filename != nullptr);
CHECK(error_msg != nullptr);
- // TODO: The work done in GetDalvikCache is overkill for what we need.
- // Ideally a new API for getting the DalvikCacheDirectory the way we want
- // (without existence testing, creation, or death) is provided with the rest
- // of the GetDalvikCache family of functions. Until such an API is in place,
- // we use GetDalvikCache to avoid duplicating the logic for determining the
- // dalvik cache directory.
- std::string dalvik_cache_dir;
- bool ignored;
- GetDalvikCache("", false, &dalvik_cache_dir, &ignored, &ignored, &ignored);
+ std::string cache_dir = GetDalvikCache(GetInstructionSetString(isa));
+ if (cache_dir.empty()) {
+ *error_msg = "Dalvik cache directory does not exist";
+ return false;
+ }
// TODO: The oat file assistant should be the definitive place for
// determining the oat file name from the dex location, not
// GetDalvikCacheFilename.
- std::string cache_dir = StringPrintf("%s%s",
- dalvik_cache_dir.c_str(), GetInstructionSetString(isa));
return GetDalvikCacheFilename(location.c_str(), cache_dir.c_str(), oat_filename, error_msg);
}
diff --git a/runtime/utils.cc b/runtime/utils.cc
index 515ba9f9e3..8ab8cd2814 100644
--- a/runtime/utils.cc
+++ b/runtime/utils.cc
@@ -1087,58 +1087,18 @@ void GetDalvikCache(const char* subdir, const bool create_if_absent, std::string
}
}
-static std::string GetDalvikCacheImpl(const char* subdir,
- const bool create_if_absent,
- const bool abort_on_error) {
+std::string GetDalvikCache(const char* subdir) {
CHECK(subdir != nullptr);
const char* android_data = GetAndroidData();
const std::string dalvik_cache_root(StringPrintf("%s/dalvik-cache/", android_data));
const std::string dalvik_cache = dalvik_cache_root + subdir;
if (!OS::DirectoryExists(dalvik_cache.c_str())) {
- if (!create_if_absent) {
- // TODO: Check callers. Traditional behavior is to not to abort, even when abort_on_error.
- return "";
- }
-
- // Don't create the system's /data/dalvik-cache/... because it needs special permissions.
- if (strcmp(android_data, "/data") == 0) {
- if (abort_on_error) {
- LOG(FATAL) << "Failed to find dalvik-cache directory " << dalvik_cache
- << ", cannot create /data dalvik-cache.";
- UNREACHABLE();
- }
- return "";
- }
-
- int result = mkdir(dalvik_cache_root.c_str(), 0700);
- if (result != 0 && errno != EEXIST) {
- if (abort_on_error) {
- PLOG(FATAL) << "Failed to create dalvik-cache root directory " << dalvik_cache_root;
- UNREACHABLE();
- }
- return "";
- }
-
- result = mkdir(dalvik_cache.c_str(), 0700);
- if (result != 0) {
- if (abort_on_error) {
- PLOG(FATAL) << "Failed to create dalvik-cache directory " << dalvik_cache;
- UNREACHABLE();
- }
- return "";
- }
+ // TODO: Check callers. Traditional behavior is to not abort.
+ return "";
}
return dalvik_cache;
}
-std::string GetDalvikCache(const char* subdir, const bool create_if_absent) {
- return GetDalvikCacheImpl(subdir, create_if_absent, false);
-}
-
-std::string GetDalvikCacheOrDie(const char* subdir, const bool create_if_absent) {
- return GetDalvikCacheImpl(subdir, create_if_absent, true);
-}
-
bool GetDalvikCacheFilename(const char* location, const char* cache_location,
std::string* filename, std::string* error_msg) {
if (location[0] != '/') {
diff --git a/runtime/utils.h b/runtime/utils.h
index 699b732522..fd1ba23573 100644
--- a/runtime/utils.h
+++ b/runtime/utils.h
@@ -251,11 +251,8 @@ const char* GetAndroidData();
const char* GetAndroidDataSafe(std::string* error_msg);
// Returns the dalvik-cache location, with subdir appended. Returns the empty string if the cache
-// could not be found (or created).
-std::string GetDalvikCache(const char* subdir, bool create_if_absent = true);
-// Returns the dalvik-cache location, or dies trying. subdir will be
-// appended to the cache location.
-std::string GetDalvikCacheOrDie(const char* subdir, bool create_if_absent = true);
+// could not be found.
+std::string GetDalvikCache(const char* subdir);
// Return true if we found the dalvik cache and stored it in the dalvik_cache argument.
// have_android_data will be set to true if we have an ANDROID_DATA that exists,
// dalvik_cache_exists will be true if there is a dalvik-cache directory that is present.
diff --git a/runtime/utils_test.cc b/runtime/utils_test.cc
index 55b6e01f99..d2100d16d4 100644
--- a/runtime/utils_test.cc
+++ b/runtime/utils_test.cc
@@ -337,11 +337,9 @@ TEST_F(UtilsTest, GetDalvikCacheFilenameOrDie) {
}
TEST_F(UtilsTest, GetDalvikCache) {
- EXPECT_STREQ("", GetDalvikCache("should-not-exist123", false).c_str());
+ EXPECT_STREQ("", GetDalvikCache("should-not-exist123").c_str());
- EXPECT_STREQ((android_data_ + "/dalvik-cache/.").c_str(), GetDalvikCache(".", false).c_str());
- EXPECT_STREQ((android_data_ + "/dalvik-cache/should-not-be-there").c_str(),
- GetDalvikCache("should-not-be-there", true).c_str());
+ EXPECT_STREQ((android_data_ + "/dalvik-cache/.").c_str(), GetDalvikCache(".").c_str());
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-11 00:04:01 +0000