Bug Summary

File:jdk/src/hotspot/share/services/memReporter.cpp
Warning:line 528, column 11
Value stored to 'class_count_diff' during its initialization is never read

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name memReporter.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/libjvm/objs/precompiled -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D _GNU_SOURCE -D _REENTRANT -D LIBC=gnu -D LINUX -D VM_LITTLE_ENDIAN -D _LP64=1 -D ASSERT -D CHECK_UNHANDLED_OOPS -D TARGET_ARCH_x86 -D INCLUDE_SUFFIX_OS=_linux -D INCLUDE_SUFFIX_CPU=_x86 -D INCLUDE_SUFFIX_COMPILER=_gcc -D TARGET_COMPILER_gcc -D AMD64 -D HOTSPOT_LIB_ARCH="amd64" -D COMPILER1 -D COMPILER2 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -I /home/daniel/Projects/java/jdk/src/hotspot/share/precompiled -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjimage -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -D _FORTIFY_SOURCE=2 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-format-zero-length -Wno-unused-parameter -Wno-unused -Wno-parentheses -Wno-comment -Wno-unknown-pragmas -Wno-address -Wno-delete-non-virtual-dtor -Wno-char-subscripts -Wno-array-bounds -Wno-int-in-bool-context -Wno-ignored-qualifiers -Wno-missing-field-initializers -Wno-implicit-fallthrough -Wno-empty-body -Wno-strict-overflow -Wno-sequence-point -Wno-maybe-uninitialized -Wno-misleading-indentation -Wno-cast-function-type -Wno-shift-negative-value -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make/hotspot -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -stack-protector 1 -fno-rtti -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c++ /home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp
1/*
2 * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24#include "precompiled.hpp"
25#include "memory/allocation.hpp"
26#include "memory/metaspace.hpp"
27#include "memory/metaspaceUtils.hpp"
28#include "services/mallocTracker.hpp"
29#include "services/memReporter.hpp"
30#include "services/threadStackTracker.hpp"
31#include "services/virtualMemoryTracker.hpp"
32#include "utilities/globalDefinitions.hpp"
33
34size_t MemReporterBase::reserved_total(const MallocMemory* malloc, const VirtualMemory* vm) const {
35 return malloc->malloc_size() + malloc->arena_size() + vm->reserved();
36}
37
38size_t MemReporterBase::committed_total(const MallocMemory* malloc, const VirtualMemory* vm) const {
39 return malloc->malloc_size() + malloc->arena_size() + vm->committed();
40}
41
42void MemReporterBase::print_total(size_t reserved, size_t committed) const {
43 const char* scale = current_scale();
44 output()->print("reserved=" SIZE_FORMAT"%" "l" "u" "%s, committed=" SIZE_FORMAT"%" "l" "u" "%s",
45 amount_in_current_scale(reserved), scale, amount_in_current_scale(committed), scale);
46}
47
48void MemReporterBase::print_malloc(size_t amount, size_t count, MEMFLAGS flag) const {
49 const char* scale = current_scale();
50 outputStream* out = output();
51 const char* alloc_type = (flag == mtThreadStack) ? "" : "malloc=";
52
53 if (flag != mtNone) {
54 out->print("(%s" SIZE_FORMAT"%" "l" "u" "%s type=%s", alloc_type,
55 amount_in_current_scale(amount), scale, NMTUtil::flag_to_name(flag));
56 } else {
57 out->print("(%s" SIZE_FORMAT"%" "l" "u" "%s", alloc_type,
58 amount_in_current_scale(amount), scale);
59 }
60
61 if (count > 0) {
62 out->print(" #" SIZE_FORMAT"%" "l" "u" "", count);
63 }
64
65 out->print(")");
66}
67
68void MemReporterBase::print_virtual_memory(size_t reserved, size_t committed) const {
69 const char* scale = current_scale();
70 output()->print("(mmap: reserved=" SIZE_FORMAT"%" "l" "u" "%s, committed=" SIZE_FORMAT"%" "l" "u" "%s)",
71 amount_in_current_scale(reserved), scale, amount_in_current_scale(committed), scale);
72}
73
74void MemReporterBase::print_malloc_line(size_t amount, size_t count) const {
75 output()->print("%28s", " ");
76 print_malloc(amount, count);
77 output()->print_cr(" ");
78}
79
80void MemReporterBase::print_virtual_memory_line(size_t reserved, size_t committed) const {
81 output()->print("%28s", " ");
82 print_virtual_memory(reserved, committed);
83 output()->print_cr(" ");
84}
85
86void MemReporterBase::print_arena_line(size_t amount, size_t count) const {
87 const char* scale = current_scale();
88 output()->print_cr("%27s (arena=" SIZE_FORMAT"%" "l" "u" "%s #" SIZE_FORMAT"%" "l" "u" ")", " ",
89 amount_in_current_scale(amount), scale, count);
90}
91
92void MemReporterBase::print_virtual_memory_region(const char* type, address base, size_t size) const {
93 const char* scale = current_scale();
94 output()->print("[" PTR_FORMAT"0x%016" "l" "x" " - " PTR_FORMAT"0x%016" "l" "x" "] %s " SIZE_FORMAT"%" "l" "u" "%s",
95 p2i(base), p2i(base + size), type, amount_in_current_scale(size), scale);
96}
97
98
99void MemSummaryReporter::report() {
100 outputStream* out = output();
101 const size_t total_malloced_bytes = _malloc_snapshot->total();
102 const size_t total_mmap_reserved_bytes = _vm_snapshot->total_reserved();
103 const size_t total_mmap_committed_bytes = _vm_snapshot->total_committed();
104
105 size_t total_reserved_amount = total_malloced_bytes + total_mmap_reserved_bytes;
106 size_t total_committed_amount = total_malloced_bytes + total_mmap_committed_bytes;
107
108 // Overall total
109 out->print_cr("\nNative Memory Tracking:\n");
110
111 if (scale() > 1) {
112 out->print_cr("(Omitting categories weighting less than 1%s)", current_scale());
113 out->cr();
114 }
115
116 out->print("Total: ");
117 print_total(total_reserved_amount, total_committed_amount);
118 out->cr();
119 out->print_cr(" malloc: " SIZE_FORMAT"%" "l" "u" "%s #" SIZE_FORMAT"%" "l" "u",
120 amount_in_current_scale(total_malloced_bytes), current_scale(),
121 _malloc_snapshot->total_count());
122 out->print(" mmap: ");
123 print_total(total_mmap_reserved_bytes, total_mmap_committed_bytes);
124 out->cr();
125 out->cr();
126
127 // Summary by memory type
128 for (int index = 0; index < mt_number_of_types; index ++) {
129 MEMFLAGS flag = NMTUtil::index_to_flag(index);
130 // thread stack is reported as part of thread category
131 if (flag == mtThreadStack) continue;
132 MallocMemory* malloc_memory = _malloc_snapshot->by_type(flag);
133 VirtualMemory* virtual_memory = _vm_snapshot->by_type(flag);
134
135 report_summary_of_type(flag, malloc_memory, virtual_memory);
136 }
137}
138
139void MemSummaryReporter::report_summary_of_type(MEMFLAGS flag,
140 MallocMemory* malloc_memory, VirtualMemory* virtual_memory) {
141
142 size_t reserved_amount = reserved_total (malloc_memory, virtual_memory);
143 size_t committed_amount = committed_total(malloc_memory, virtual_memory);
144
145 // Count thread's native stack in "Thread" category
146 if (flag == mtThread) {
147 if (ThreadStackTracker::track_as_vm()) {
148 const VirtualMemory* thread_stack_usage =
149 (const VirtualMemory*)_vm_snapshot->by_type(mtThreadStack);
150 reserved_amount += thread_stack_usage->reserved();
151 committed_amount += thread_stack_usage->committed();
152 } else {
153 const MallocMemory* thread_stack_usage =
154 (const MallocMemory*)_malloc_snapshot->by_type(mtThreadStack);
155 reserved_amount += thread_stack_usage->malloc_size();
156 committed_amount += thread_stack_usage->malloc_size();
157 }
158 } else if (flag == mtNMT) {
159 // Count malloc headers in "NMT" category
160 reserved_amount += _malloc_snapshot->malloc_overhead()->size();
161 committed_amount += _malloc_snapshot->malloc_overhead()->size();
162 }
163
164 if (amount_in_current_scale(reserved_amount) > 0) {
165 outputStream* out = output();
166 const char* scale = current_scale();
167 out->print("-%26s (", NMTUtil::flag_to_name(flag));
168 print_total(reserved_amount, committed_amount);
169 out->print_cr(")");
170
171 if (flag == mtClass) {
172 // report class count
173 out->print_cr("%27s (classes #" SIZE_FORMAT"%" "l" "u" ")",
174 " ", (_instance_class_count + _array_class_count));
175 out->print_cr("%27s ( instance classes #" SIZE_FORMAT"%" "l" "u" ", array classes #" SIZE_FORMAT"%" "l" "u" ")",
176 " ", _instance_class_count, _array_class_count);
177 } else if (flag == mtThread) {
178 if (ThreadStackTracker::track_as_vm()) {
179 const VirtualMemory* thread_stack_usage =
180 _vm_snapshot->by_type(mtThreadStack);
181 // report thread count
182 out->print_cr("%27s (thread #" SIZE_FORMAT"%" "l" "u" ")", " ", ThreadStackTracker::thread_count());
183 out->print("%27s (stack: ", " ");
184 print_total(thread_stack_usage->reserved(), thread_stack_usage->committed());
185 } else {
186 MallocMemory* thread_stack_memory = _malloc_snapshot->by_type(mtThreadStack);
187 const char* scale = current_scale();
188 // report thread count
189 assert(ThreadStackTracker::thread_count() == 0, "Not used")do { if (!(ThreadStackTracker::thread_count() == 0)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 189, "assert(" "ThreadStackTracker::thread_count() == 0" ") failed"
, "Not used"); ::breakpoint(); } } while (0);
190 out->print_cr("%27s (thread #" SIZE_FORMAT"%" "l" "u" ")", " ", thread_stack_memory->malloc_count());
191 out->print("%27s (Stack: " SIZE_FORMAT"%" "l" "u" "%s", " ",
192 amount_in_current_scale(thread_stack_memory->malloc_size()), scale);
193 }
194 out->print_cr(")");
195 }
196
197 // report malloc'd memory
198 if (amount_in_current_scale(malloc_memory->malloc_size()) > 0) {
199 // We don't know how many arena chunks are in used, so don't report the count
200 size_t count = (flag == mtChunk) ? 0 : malloc_memory->malloc_count();
201 print_malloc_line(malloc_memory->malloc_size(), count);
202 }
203
204 if (amount_in_current_scale(virtual_memory->reserved()) > 0) {
205 print_virtual_memory_line(virtual_memory->reserved(), virtual_memory->committed());
206 }
207
208 if (amount_in_current_scale(malloc_memory->arena_size()) > 0) {
209 print_arena_line(malloc_memory->arena_size(), malloc_memory->arena_count());
210 }
211
212 if (flag == mtNMT &&
213 amount_in_current_scale(_malloc_snapshot->malloc_overhead()->size()) > 0) {
214 out->print_cr("%27s (tracking overhead=" SIZE_FORMAT"%" "l" "u" "%s)", " ",
215 amount_in_current_scale(_malloc_snapshot->malloc_overhead()->size()), scale);
216 } else if (flag == mtClass) {
217 // Metadata information
218 report_metadata(Metaspace::NonClassType);
219 if (Metaspace::using_class_space()) {
220 report_metadata(Metaspace::ClassType);
221 }
222 }
223 out->print_cr(" ");
224 }
225}
226
227void MemSummaryReporter::report_metadata(Metaspace::MetadataType type) const {
228 assert(type == Metaspace::NonClassType || type == Metaspace::ClassType,do { if (!(type == Metaspace::NonClassType || type == Metaspace
::ClassType)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 229, "assert(" "type == Metaspace::NonClassType || type == Metaspace::ClassType"
") failed", "Invalid metadata type"); ::breakpoint(); } } while
(0)
229 "Invalid metadata type")do { if (!(type == Metaspace::NonClassType || type == Metaspace
::ClassType)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 229, "assert(" "type == Metaspace::NonClassType || type == Metaspace::ClassType"
") failed", "Invalid metadata type"); ::breakpoint(); } } while
(0);
230 const char* name = (type == Metaspace::NonClassType) ?
231 "Metadata: " : "Class space:";
232
233 outputStream* out = output();
234 const char* scale = current_scale();
235 const MetaspaceStats stats = MetaspaceUtils::get_statistics(type);
236
237 size_t waste = stats.committed() - stats.used();
238 float waste_percentage = stats.committed() > 0 ? (((float)waste * 100)/stats.committed()) : 0.0f;
239
240 out->print_cr("%27s ( %s)", " ", name);
241 out->print("%27s ( ", " ");
242 print_total(stats.reserved(), stats.committed());
243 out->print_cr(")");
244 out->print_cr("%27s ( used=" SIZE_FORMAT"%" "l" "u" "%s)", " ", amount_in_current_scale(stats.used()), scale);
245 out->print_cr("%27s ( waste=" SIZE_FORMAT"%" "l" "u" "%s =%2.2f%%)", " ", amount_in_current_scale(waste),
246 scale, waste_percentage);
247}
248
249void MemDetailReporter::report_detail() {
250 // Start detail report
251 outputStream* out = output();
252 out->print_cr("Details:\n");
253
254 int num_omitted =
255 report_malloc_sites() +
256 report_virtual_memory_allocation_sites();
257 if (num_omitted > 0) {
258 assert(scale() > 1, "sanity")do { if (!(scale() > 1)) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 258, "assert(" "scale() > 1" ") failed", "sanity"); ::breakpoint
(); } } while (0);
259 out->print_cr("(%d call sites weighting less than 1%s each omitted.)",
260 num_omitted, current_scale());
261 out->cr();
262 }
263}
264
265int MemDetailReporter::report_malloc_sites() {
266 MallocSiteIterator malloc_itr = _baseline.malloc_sites(MemBaseline::by_size);
267 if (malloc_itr.is_empty()) return 0;
268
269 outputStream* out = output();
270
271 const MallocSite* malloc_site;
272 int num_omitted = 0;
273 while ((malloc_site = malloc_itr.next()) != NULL__null) {
274 // Don't report free sites; does not count toward omitted count.
275 if (malloc_site->size() == 0) {
276 continue;
277 }
278 // Don't report if site has allocated less than one unit of whatever our scale is
279 if (scale() > 1 && amount_in_current_scale(malloc_site->size()) == 0) {
280 num_omitted ++;
281 continue;
282 }
283 const NativeCallStack* stack = malloc_site->call_stack();
284 stack->print_on(out);
285 out->print("%29s", " ");
286 MEMFLAGS flag = malloc_site->flag();
287 assert(NMTUtil::flag_is_valid(flag) && flag != mtNone,do { if (!(NMTUtil::flag_is_valid(flag) && flag != mtNone
)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 288, "assert(" "NMTUtil::flag_is_valid(flag) && flag != mtNone"
") failed", "Must have a valid memory type"); ::breakpoint()
; } } while (0)
288 "Must have a valid memory type")do { if (!(NMTUtil::flag_is_valid(flag) && flag != mtNone
)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 288, "assert(" "NMTUtil::flag_is_valid(flag) && flag != mtNone"
") failed", "Must have a valid memory type"); ::breakpoint()
; } } while (0);
289 print_malloc(malloc_site->size(), malloc_site->count(),flag);
290 out->print_cr("\n");
291 }
292 return num_omitted;
293}
294
295int MemDetailReporter::report_virtual_memory_allocation_sites() {
296 VirtualMemorySiteIterator virtual_memory_itr =
297 _baseline.virtual_memory_sites(MemBaseline::by_size);
298
299 if (virtual_memory_itr.is_empty()) return 0;
300
301 outputStream* out = output();
302 const VirtualMemoryAllocationSite* virtual_memory_site;
303 int num_omitted = 0;
304 while ((virtual_memory_site = virtual_memory_itr.next()) != NULL__null) {
305 // Don't report free sites; does not count toward omitted count.
306 if (virtual_memory_site->reserved() == 0) {
307 continue;
308 }
309 // Don't report if site has reserved less than one unit of whatever our scale is
310 if (scale() > 1 && amount_in_current_scale(virtual_memory_site->reserved()) == 0) {
311 num_omitted++;
312 continue;
313 }
314 const NativeCallStack* stack = virtual_memory_site->call_stack();
315 stack->print_on(out);
316 out->print("%28s (", " ");
317 print_total(virtual_memory_site->reserved(), virtual_memory_site->committed());
318 MEMFLAGS flag = virtual_memory_site->flag();
319 if (flag != mtNone) {
320 out->print(" Type=%s", NMTUtil::flag_to_name(flag));
321 }
322 out->print_cr(")\n");
323 }
324 return num_omitted;
325}
326
327
328void MemDetailReporter::report_virtual_memory_map() {
329 // Virtual memory map always in base address order
330 VirtualMemoryAllocationIterator itr = _baseline.virtual_memory_allocations();
331 const ReservedMemoryRegion* rgn;
332
333 output()->print_cr("Virtual memory map:");
334 while ((rgn = itr.next()) != NULL__null) {
335 report_virtual_memory_region(rgn);
336 }
337}
338
339void MemDetailReporter::report_virtual_memory_region(const ReservedMemoryRegion* reserved_rgn) {
340 assert(reserved_rgn != NULL, "NULL pointer")do { if (!(reserved_rgn != __null)) { (*g_assert_poison) = 'X'
;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 340, "assert(" "reserved_rgn != __null" ") failed", "NULL pointer"
); ::breakpoint(); } } while (0);
341
342 // Don't report if size is too small
343 if (amount_in_current_scale(reserved_rgn->size()) == 0) return;
344
345 outputStream* out = output();
346 const char* scale = current_scale();
347 const NativeCallStack* stack = reserved_rgn->call_stack();
348 bool all_committed = reserved_rgn->size() == reserved_rgn->committed_size();
349 const char* region_type = (all_committed ? "reserved and committed" : "reserved");
350 out->print_cr(" ");
351 print_virtual_memory_region(region_type, reserved_rgn->base(), reserved_rgn->size());
352 out->print(" for %s", NMTUtil::flag_to_name(reserved_rgn->flag()));
353 if (stack->is_empty()) {
354 out->print_cr(" ");
355 } else {
356 out->print_cr(" from");
357 stack->print_on(out, 4);
358 }
359
360 if (all_committed) {
361 CommittedRegionIterator itr = reserved_rgn->iterate_committed_regions();
362 const CommittedMemoryRegion* committed_rgn = itr.next();
363 if (committed_rgn->size() == reserved_rgn->size() && committed_rgn->call_stack()->equals(*stack)) {
364 // One region spanning the entire reserved region, with the same stack trace.
365 // Don't print this regions because the "reserved and committed" line above
366 // already indicates that the region is comitted.
367 assert(itr.next() == NULL, "Unexpectedly more than one regions")do { if (!(itr.next() == __null)) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 367, "assert(" "itr.next() == __null" ") failed", "Unexpectedly more than one regions"
); ::breakpoint(); } } while (0);
368 return;
369 }
370 }
371
372 CommittedRegionIterator itr = reserved_rgn->iterate_committed_regions();
373 const CommittedMemoryRegion* committed_rgn;
374 while ((committed_rgn = itr.next()) != NULL__null) {
375 // Don't report if size is too small
376 if (amount_in_current_scale(committed_rgn->size()) == 0) continue;
377 stack = committed_rgn->call_stack();
378 out->print("\n\t");
379 print_virtual_memory_region("committed", committed_rgn->base(), committed_rgn->size());
380 if (stack->is_empty()) {
381 out->print_cr(" ");
382 } else {
383 out->print_cr(" from");
384 stack->print_on(out, 12);
385 }
386 }
387}
388
389void MemSummaryDiffReporter::report_diff() {
390 outputStream* out = output();
391 out->print_cr("\nNative Memory Tracking:\n");
392
393 if (scale() > 1) {
394 out->print_cr("(Omitting categories weighting less than 1%s)", current_scale());
395 out->cr();
396 }
397
398 // Overall diff
399 out->print("Total: ");
400 print_virtual_memory_diff(_current_baseline.total_reserved_memory(),
401 _current_baseline.total_committed_memory(), _early_baseline.total_reserved_memory(),
402 _early_baseline.total_committed_memory());
403
404 out->print_cr("\n");
405
406 // Summary diff by memory type
407 for (int index = 0; index < mt_number_of_types; index ++) {
408 MEMFLAGS flag = NMTUtil::index_to_flag(index);
409 // thread stack is reported as part of thread category
410 if (flag == mtThreadStack) continue;
411 diff_summary_of_type(flag,
412 _early_baseline.malloc_memory(flag),
413 _early_baseline.virtual_memory(flag),
414 _early_baseline.metaspace_stats(),
415 _current_baseline.malloc_memory(flag),
416 _current_baseline.virtual_memory(flag),
417 _current_baseline.metaspace_stats());
418 }
419}
420
421void MemSummaryDiffReporter::print_malloc_diff(size_t current_amount, size_t current_count,
422 size_t early_amount, size_t early_count, MEMFLAGS flags) const {
423 const char* scale = current_scale();
424 outputStream* out = output();
425 const char* alloc_type = (flags == mtThread) ? "" : "malloc=";
426
427 out->print("%s" SIZE_FORMAT"%" "l" "u" "%s", alloc_type, amount_in_current_scale(current_amount), scale);
428 // Report type only if it is valid and not under "thread" category
429 if (flags != mtNone && flags != mtThread) {
430 out->print(" type=%s", NMTUtil::flag_to_name(flags));
431 }
432
433 long amount_diff = diff_in_current_scale(current_amount, early_amount);
434 if (amount_diff != 0) {
435 out->print(" %+ld%s", amount_diff, scale);
436 }
437 if (current_count > 0) {
438 out->print(" #" SIZE_FORMAT"%" "l" "u" "", current_count);
439 if (current_count != early_count) {
440 out->print(" %+d", (int)(current_count - early_count));
441 }
442 }
443}
444
445void MemSummaryDiffReporter::print_arena_diff(size_t current_amount, size_t current_count,
446 size_t early_amount, size_t early_count) const {
447 const char* scale = current_scale();
448 outputStream* out = output();
449 out->print("arena=" SIZE_FORMAT"%" "l" "u" "%s", amount_in_current_scale(current_amount), scale);
450 if (diff_in_current_scale(current_amount, early_amount) != 0) {
451 out->print(" %+ld", diff_in_current_scale(current_amount, early_amount));
452 }
453
454 out->print(" #" SIZE_FORMAT"%" "l" "u" "", current_count);
455 if (current_count != early_count) {
456 out->print(" %+d", (int)(current_count - early_count));
457 }
458}
459
460void MemSummaryDiffReporter::print_virtual_memory_diff(size_t current_reserved, size_t current_committed,
461 size_t early_reserved, size_t early_committed) const {
462 const char* scale = current_scale();
463 outputStream* out = output();
464 out->print("reserved=" SIZE_FORMAT"%" "l" "u" "%s", amount_in_current_scale(current_reserved), scale);
465 long reserved_diff = diff_in_current_scale(current_reserved, early_reserved);
466 if (reserved_diff != 0) {
467 out->print(" %+ld%s", reserved_diff, scale);
468 }
469
470 out->print(", committed=" SIZE_FORMAT"%" "l" "u" "%s", amount_in_current_scale(current_committed), scale);
471 long committed_diff = diff_in_current_scale(current_committed, early_committed);
472 if (committed_diff != 0) {
473 out->print(" %+ld%s", committed_diff, scale);
474 }
475}
476
477
478void MemSummaryDiffReporter::diff_summary_of_type(MEMFLAGS flag,
479 const MallocMemory* early_malloc, const VirtualMemory* early_vm,
480 const MetaspaceCombinedStats& early_ms,
481 const MallocMemory* current_malloc, const VirtualMemory* current_vm,
482 const MetaspaceCombinedStats& current_ms) const {
483
484 outputStream* out = output();
485 const char* scale = current_scale();
486
487 // Total reserved and committed memory in current baseline
488 size_t current_reserved_amount = reserved_total (current_malloc, current_vm);
489 size_t current_committed_amount = committed_total(current_malloc, current_vm);
490
491 // Total reserved and committed memory in early baseline
492 size_t early_reserved_amount = reserved_total(early_malloc, early_vm);
493 size_t early_committed_amount = committed_total(early_malloc, early_vm);
494
495 // Adjust virtual memory total
496 if (flag == mtThread) {
497 const VirtualMemory* early_thread_stack_usage =
498 _early_baseline.virtual_memory(mtThreadStack);
499 const VirtualMemory* current_thread_stack_usage =
500 _current_baseline.virtual_memory(mtThreadStack);
501
502 early_reserved_amount += early_thread_stack_usage->reserved();
503 early_committed_amount += early_thread_stack_usage->committed();
504
505 current_reserved_amount += current_thread_stack_usage->reserved();
506 current_committed_amount += current_thread_stack_usage->committed();
507 } else if (flag == mtNMT) {
508 early_reserved_amount += _early_baseline.malloc_tracking_overhead();
509 early_committed_amount += _early_baseline.malloc_tracking_overhead();
510
511 current_reserved_amount += _current_baseline.malloc_tracking_overhead();
512 current_committed_amount += _current_baseline.malloc_tracking_overhead();
513 }
514
515 if (amount_in_current_scale(current_reserved_amount) > 0 ||
516 diff_in_current_scale(current_reserved_amount, early_reserved_amount) != 0) {
517
518 // print summary line
519 out->print("-%26s (", NMTUtil::flag_to_name(flag));
520 print_virtual_memory_diff(current_reserved_amount, current_committed_amount,
521 early_reserved_amount, early_committed_amount);
522 out->print_cr(")");
523
524 // detail lines
525 if (flag == mtClass) {
526 // report class count
527 out->print("%27s (classes #" SIZE_FORMAT"%" "l" "u" "", " ", _current_baseline.class_count());
528 int class_count_diff = (int)(_current_baseline.class_count() -
Value stored to 'class_count_diff' during its initialization is never read
529 _early_baseline.class_count());
530 if (_current_baseline.class_count() != _early_baseline.class_count()) {
531 out->print(" %+d", (int)(_current_baseline.class_count() - _early_baseline.class_count()));
532 }
533 out->print_cr(")");
534
535 out->print("%27s ( instance classes #" SIZE_FORMAT"%" "l" "u", " ", _current_baseline.instance_class_count());
536 if (_current_baseline.instance_class_count() != _early_baseline.instance_class_count()) {
537 out->print(" %+d", (int)(_current_baseline.instance_class_count() - _early_baseline.instance_class_count()));
538 }
539 out->print(", array classes #" SIZE_FORMAT"%" "l" "u", _current_baseline.array_class_count());
540 if (_current_baseline.array_class_count() != _early_baseline.array_class_count()) {
541 out->print(" %+d", (int)(_current_baseline.array_class_count() - _early_baseline.array_class_count()));
542 }
543 out->print_cr(")");
544
545 } else if (flag == mtThread) {
546 // report thread count
547 out->print("%27s (thread #" SIZE_FORMAT"%" "l" "u" "", " ", _current_baseline.thread_count());
548 int thread_count_diff = (int)(_current_baseline.thread_count() -
549 _early_baseline.thread_count());
550 if (thread_count_diff != 0) {
551 out->print(" %+d", thread_count_diff);
552 }
553 out->print_cr(")");
554
555 out->print("%27s (stack: ", " ");
556 if (ThreadStackTracker::track_as_vm()) {
557 // report thread stack
558 const VirtualMemory* current_thread_stack =
559 _current_baseline.virtual_memory(mtThreadStack);
560 const VirtualMemory* early_thread_stack =
561 _early_baseline.virtual_memory(mtThreadStack);
562
563 print_virtual_memory_diff(current_thread_stack->reserved(), current_thread_stack->committed(),
564 early_thread_stack->reserved(), early_thread_stack->committed());
565 } else {
566 const MallocMemory* current_thread_stack =
567 _current_baseline.malloc_memory(mtThreadStack);
568 const MallocMemory* early_thread_stack =
569 _early_baseline.malloc_memory(mtThreadStack);
570
571 print_malloc_diff(current_thread_stack->malloc_size(), current_thread_stack->malloc_count(),
572 early_thread_stack->malloc_size(), early_thread_stack->malloc_count(), flag);
573 }
574 out->print_cr(")");
575 }
576
577 // Report malloc'd memory
578 size_t current_malloc_amount = current_malloc->malloc_size();
579 size_t early_malloc_amount = early_malloc->malloc_size();
580 if (amount_in_current_scale(current_malloc_amount) > 0 ||
581 diff_in_current_scale(current_malloc_amount, early_malloc_amount) != 0) {
582 out->print("%28s(", " ");
583 print_malloc_diff(current_malloc_amount, (flag == mtChunk) ? 0 : current_malloc->malloc_count(),
584 early_malloc_amount, early_malloc->malloc_count(), mtNone);
585 out->print_cr(")");
586 }
587
588 // Report virtual memory
589 if (amount_in_current_scale(current_vm->reserved()) > 0 ||
590 diff_in_current_scale(current_vm->reserved(), early_vm->reserved()) != 0) {
591 out->print("%27s (mmap: ", " ");
592 print_virtual_memory_diff(current_vm->reserved(), current_vm->committed(),
593 early_vm->reserved(), early_vm->committed());
594 out->print_cr(")");
595 }
596
597 // Report arena memory
598 if (amount_in_current_scale(current_malloc->arena_size()) > 0 ||
599 diff_in_current_scale(current_malloc->arena_size(), early_malloc->arena_size()) != 0) {
600 out->print("%28s(", " ");
601 print_arena_diff(current_malloc->arena_size(), current_malloc->arena_count(),
602 early_malloc->arena_size(), early_malloc->arena_count());
603 out->print_cr(")");
604 }
605
606 // Report native memory tracking overhead
607 if (flag == mtNMT) {
608 size_t current_tracking_overhead = amount_in_current_scale(_current_baseline.malloc_tracking_overhead());
609 size_t early_tracking_overhead = amount_in_current_scale(_early_baseline.malloc_tracking_overhead());
610
611 out->print("%27s (tracking overhead=" SIZE_FORMAT"%" "l" "u" "%s", " ",
612 amount_in_current_scale(_current_baseline.malloc_tracking_overhead()), scale);
613
614 long overhead_diff = diff_in_current_scale(_current_baseline.malloc_tracking_overhead(),
615 _early_baseline.malloc_tracking_overhead());
616 if (overhead_diff != 0) {
617 out->print(" %+ld%s", overhead_diff, scale);
618 }
619 out->print_cr(")");
620 } else if (flag == mtClass) {
621 print_metaspace_diff(current_ms, early_ms);
622 }
623 out->print_cr(" ");
624 }
625}
626
627void MemSummaryDiffReporter::print_metaspace_diff(const MetaspaceCombinedStats& current_ms,
628 const MetaspaceCombinedStats& early_ms) const {
629 print_metaspace_diff("Metadata", current_ms.non_class_space_stats(), early_ms.non_class_space_stats());
630 if (Metaspace::using_class_space()) {
631 print_metaspace_diff("Class space", current_ms.class_space_stats(), early_ms.class_space_stats());
632 }
633}
634
635void MemSummaryDiffReporter::print_metaspace_diff(const char* header,
636 const MetaspaceStats& current_stats,
637 const MetaspaceStats& early_stats) const {
638 outputStream* out = output();
639 const char* scale = current_scale();
640
641 out->print_cr("%27s: ( %s)", " ", header);
642 out->print("%27s ( ", " ");
643 print_virtual_memory_diff(current_stats.reserved(),
644 current_stats.committed(),
645 early_stats.reserved(),
646 early_stats.committed());
647 out->print_cr(")");
648
649 long diff_used = diff_in_current_scale(current_stats.used(),
650 early_stats.used());
651
652 size_t current_waste = current_stats.committed() - current_stats.used();
653 size_t early_waste = early_stats.committed() - early_stats.used();
654 long diff_waste = diff_in_current_scale(current_waste, early_waste);
655
656 // Diff used
657 out->print("%27s ( used=" SIZE_FORMAT"%" "l" "u" "%s", " ",
658 amount_in_current_scale(current_stats.used()), scale);
659 if (diff_used != 0) {
660 out->print(" %+ld%s", diff_used, scale);
661 }
662 out->print_cr(")");
663
664 // Diff waste
665 const float waste_percentage = current_stats.committed() == 0 ? 0.0f :
666 (current_waste * 100.0f) / current_stats.committed();
667 out->print("%27s ( waste=" SIZE_FORMAT"%" "l" "u" "%s =%2.2f%%", " ",
668 amount_in_current_scale(current_waste), scale, waste_percentage);
669 if (diff_waste != 0) {
670 out->print(" %+ld%s", diff_waste, scale);
671 }
672 out->print_cr(")");
673}
674
675void MemDetailDiffReporter::report_diff() {
676 MemSummaryDiffReporter::report_diff();
677 diff_malloc_sites();
678 diff_virtual_memory_sites();
679}
680
681void MemDetailDiffReporter::diff_malloc_sites() const {
682 MallocSiteIterator early_itr = _early_baseline.malloc_sites(MemBaseline::by_site_and_type);
683 MallocSiteIterator current_itr = _current_baseline.malloc_sites(MemBaseline::by_site_and_type);
684
685 const MallocSite* early_site = early_itr.next();
686 const MallocSite* current_site = current_itr.next();
687
688 while (early_site != NULL__null || current_site != NULL__null) {
689 if (early_site == NULL__null) {
690 new_malloc_site(current_site);
691 current_site = current_itr.next();
692 } else if (current_site == NULL__null) {
693 old_malloc_site(early_site);
694 early_site = early_itr.next();
695 } else {
696 int compVal = current_site->call_stack()->compare(*early_site->call_stack());
697 if (compVal < 0) {
698 new_malloc_site(current_site);
699 current_site = current_itr.next();
700 } else if (compVal > 0) {
701 old_malloc_site(early_site);
702 early_site = early_itr.next();
703 } else {
704 diff_malloc_site(early_site, current_site);
705 early_site = early_itr.next();
706 current_site = current_itr.next();
707 }
708 }
709 }
710}
711
712void MemDetailDiffReporter::diff_virtual_memory_sites() const {
713 VirtualMemorySiteIterator early_itr = _early_baseline.virtual_memory_sites(MemBaseline::by_site);
714 VirtualMemorySiteIterator current_itr = _current_baseline.virtual_memory_sites(MemBaseline::by_site);
715
716 const VirtualMemoryAllocationSite* early_site = early_itr.next();
717 const VirtualMemoryAllocationSite* current_site = current_itr.next();
718
719 while (early_site != NULL__null || current_site != NULL__null) {
720 if (early_site == NULL__null) {
721 new_virtual_memory_site(current_site);
722 current_site = current_itr.next();
723 } else if (current_site == NULL__null) {
724 old_virtual_memory_site(early_site);
725 early_site = early_itr.next();
726 } else {
727 int compVal = current_site->call_stack()->compare(*early_site->call_stack());
728 if (compVal < 0) {
729 new_virtual_memory_site(current_site);
730 current_site = current_itr.next();
731 } else if (compVal > 0) {
732 old_virtual_memory_site(early_site);
733 early_site = early_itr.next();
734 } else {
735 diff_virtual_memory_site(early_site, current_site);
736 early_site = early_itr.next();
737 current_site = current_itr.next();
738 }
739 }
740 }
741}
742
743
744void MemDetailDiffReporter::new_malloc_site(const MallocSite* malloc_site) const {
745 diff_malloc_site(malloc_site->call_stack(), malloc_site->size(), malloc_site->count(),
746 0, 0, malloc_site->flag());
747}
748
749void MemDetailDiffReporter::old_malloc_site(const MallocSite* malloc_site) const {
750 diff_malloc_site(malloc_site->call_stack(), 0, 0, malloc_site->size(),
751 malloc_site->count(), malloc_site->flag());
752}
753
754void MemDetailDiffReporter::diff_malloc_site(const MallocSite* early,
755 const MallocSite* current) const {
756 if (early->flag() != current->flag()) {
757 // If malloc site type changed, treat it as deallocation of old type and
758 // allocation of new type.
759 old_malloc_site(early);
760 new_malloc_site(current);
761 } else {
762 diff_malloc_site(current->call_stack(), current->size(), current->count(),
763 early->size(), early->count(), early->flag());
764 }
765}
766
767void MemDetailDiffReporter::diff_malloc_site(const NativeCallStack* stack, size_t current_size,
768 size_t current_count, size_t early_size, size_t early_count, MEMFLAGS flags) const {
769 outputStream* out = output();
770
771 assert(stack != NULL, "NULL stack")do { if (!(stack != __null)) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 771, "assert(" "stack != __null" ") failed", "NULL stack");
::breakpoint(); } } while (0);
772
773 if (diff_in_current_scale(current_size, early_size) == 0) {
774 return;
775 }
776
777 stack->print_on(out);
778 out->print("%28s (", " ");
779 print_malloc_diff(current_size, current_count,
780 early_size, early_count, flags);
781
782 out->print_cr(")\n");
783}
784
785
786void MemDetailDiffReporter::new_virtual_memory_site(const VirtualMemoryAllocationSite* site) const {
787 diff_virtual_memory_site(site->call_stack(), site->reserved(), site->committed(), 0, 0, site->flag());
788}
789
790void MemDetailDiffReporter::old_virtual_memory_site(const VirtualMemoryAllocationSite* site) const {
791 diff_virtual_memory_site(site->call_stack(), 0, 0, site->reserved(), site->committed(), site->flag());
792}
793
794void MemDetailDiffReporter::diff_virtual_memory_site(const VirtualMemoryAllocationSite* early,
795 const VirtualMemoryAllocationSite* current) const {
796 assert(early->flag() == current->flag(), "Should be the same")do { if (!(early->flag() == current->flag())) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/services/memReporter.cpp"
, 796, "assert(" "early->flag() == current->flag()" ") failed"
, "Should be the same"); ::breakpoint(); } } while (0);
797 diff_virtual_memory_site(current->call_stack(), current->reserved(), current->committed(),
798 early->reserved(), early->committed(), current->flag());
799}
800
801void MemDetailDiffReporter::diff_virtual_memory_site(const NativeCallStack* stack, size_t current_reserved,
802 size_t current_committed, size_t early_reserved, size_t early_committed, MEMFLAGS flag) const {
803 outputStream* out = output();
804
805 // no change
806 if (diff_in_current_scale(current_reserved, early_reserved) == 0 &&
807 diff_in_current_scale(current_committed, early_committed) == 0) {
808 return;
809 }
810
811 stack->print_on(out);
812 out->print("%28s (mmap: ", " ");
813 print_virtual_memory_diff(current_reserved, current_committed,
814 early_reserved, early_committed);
815
816 if (flag != mtNone) {
817 out->print(" Type=%s", NMTUtil::flag_to_name(flag));
818 }
819
820 out->print_cr(")\n");
821 }