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1 // Copyright (c) 2008, Google Inc. | 1 // Copyright (c) 2008, Google Inc. |
2 // All rights reserved. | 2 // All rights reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // met: |
7 // | 7 // |
8 // * Redistributions of source code must retain the above copyright | 8 // * Redistributions of source code must retain the above copyright |
9 // notice, this list of conditions and the following disclaimer. | 9 // notice, this list of conditions and the following disclaimer. |
10 // * Redistributions in binary form must reproduce the above | 10 // * Redistributions in binary form must reproduce the above |
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31 // Author: Sanjay Ghemawat <opensource@google.com> | 31 // Author: Sanjay Ghemawat <opensource@google.com> |
32 | 32 |
33 #ifndef TCMALLOC_PAGE_HEAP_H_ | 33 #ifndef TCMALLOC_PAGE_HEAP_H_ |
34 #define TCMALLOC_PAGE_HEAP_H_ | 34 #define TCMALLOC_PAGE_HEAP_H_ |
35 | 35 |
36 #include <config.h> | 36 #include <config.h> |
37 #include <stddef.h> // for size_t | 37 #include <stddef.h> // for size_t |
38 #ifdef HAVE_STDINT_H | 38 #ifdef HAVE_STDINT_H |
39 #include <stdint.h> // for uint64_t, int64_t, uint16_t | 39 #include <stdint.h> // for uint64_t, int64_t, uint16_t |
40 #endif | 40 #endif |
41 #include <google/malloc_extension.h> | 41 #include <gperftools/malloc_extension.h> |
42 #include "base/basictypes.h" | 42 #include "base/basictypes.h" |
43 #include "common.h" | 43 #include "common.h" |
44 #include "packed-cache-inl.h" | 44 #include "packed-cache-inl.h" |
45 #include "pagemap.h" | 45 #include "pagemap.h" |
46 #include "span.h" | 46 #include "span.h" |
47 | 47 |
48 // We need to dllexport PageHeap just for the unittest. MSVC complains | 48 // We need to dllexport PageHeap just for the unittest. MSVC complains |
49 // that we don't dllexport the PageHeap members, but we don't need to | 49 // that we don't dllexport the PageHeap members, but we don't need to |
50 // test those, so I just suppress this warning. | 50 // test those, so I just suppress this warning. |
51 #ifdef _MSC_VER | 51 #ifdef _MSC_VER |
52 #pragma warning(push) | 52 #pragma warning(push) |
53 #pragma warning(disable:4251) | 53 #pragma warning(disable:4251) |
54 #endif | 54 #endif |
55 | 55 |
56 // This #ifdef should almost never be set. Set NO_TCMALLOC_SAMPLES if | 56 // This #ifdef should almost never be set. Set NO_TCMALLOC_SAMPLES if |
57 // you're porting to a system where you really can't get a stacktrace. | 57 // you're porting to a system where you really can't get a stacktrace. |
58 // Because we control the definition of GetStackTrace, all clients of | 58 // Because we control the definition of GetStackTrace, all clients of |
59 // GetStackTrace should #include us rather than stacktrace.h. | 59 // GetStackTrace should #include us rather than stacktrace.h. |
60 #ifdef NO_TCMALLOC_SAMPLES | 60 #ifdef NO_TCMALLOC_SAMPLES |
61 // We use #define so code compiles even if you #include stacktrace.h somehow. | 61 // We use #define so code compiles even if you #include stacktrace.h somehow. |
62 # define GetStackTrace(stack, depth, skip) (0) | 62 # define GetStackTrace(stack, depth, skip) (0) |
63 #else | 63 #else |
64 # include <google/stacktrace.h> | 64 # include <gperftools/stacktrace.h> |
65 #endif | 65 #endif |
66 | 66 |
67 class TCMalloc_Printer; | |
68 namespace base { | 67 namespace base { |
69 struct MallocRange; | 68 struct MallocRange; |
70 } | 69 } |
71 | 70 |
72 namespace tcmalloc { | 71 namespace tcmalloc { |
73 | 72 |
74 // ------------------------------------------------------------------------- | 73 // ------------------------------------------------------------------------- |
75 // Map from page-id to per-page data | 74 // Map from page-id to per-page data |
76 // ------------------------------------------------------------------------- | 75 // ------------------------------------------------------------------------- |
77 | 76 |
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138 // REQUIRES: span->location == IN_USE | 137 // REQUIRES: span->location == IN_USE |
139 // REQUIRES: span->sizeclass == 0 | 138 // REQUIRES: span->sizeclass == 0 |
140 Span* Split(Span* span, Length n); | 139 Span* Split(Span* span, Length n); |
141 | 140 |
142 // Return the descriptor for the specified page. Returns NULL if | 141 // Return the descriptor for the specified page. Returns NULL if |
143 // this PageID was not allocated previously. | 142 // this PageID was not allocated previously. |
144 inline Span* GetDescriptor(PageID p) const { | 143 inline Span* GetDescriptor(PageID p) const { |
145 return reinterpret_cast<Span*>(pagemap_.get(p)); | 144 return reinterpret_cast<Span*>(pagemap_.get(p)); |
146 } | 145 } |
147 | 146 |
148 // Dump state to stderr | |
149 void Dump(TCMalloc_Printer* out); | |
150 | |
151 // If this page heap is managing a range with starting page # >= start, | 147 // If this page heap is managing a range with starting page # >= start, |
152 // store info about the range in *r and return true. Else return false. | 148 // store info about the range in *r and return true. Else return false. |
153 bool GetNextRange(PageID start, base::MallocRange* r); | 149 bool GetNextRange(PageID start, base::MallocRange* r); |
154 | 150 |
155 // Page heap statistics | 151 // Page heap statistics |
156 struct Stats { | 152 struct Stats { |
157 Stats() : system_bytes(0), free_bytes(0), unmapped_bytes(0) {} | 153 Stats() : system_bytes(0), free_bytes(0), unmapped_bytes(0) {} |
158 uint64_t system_bytes; // Total bytes allocated from system | 154 uint64_t system_bytes; // Total bytes allocated from system |
159 uint64_t free_bytes; // Total bytes on normal freelists | 155 uint64_t free_bytes; // Total bytes on normal freelists |
160 uint64_t unmapped_bytes; // Total bytes on returned freelists | 156 uint64_t unmapped_bytes; // Total bytes on returned freelists |
161 uint64_t committed_bytes; // Bytes committed, always <= system_bytes_. | 157 uint64_t committed_bytes; // Bytes committed, always <= system_bytes_. |
162 | 158 |
163 }; | 159 }; |
164 inline Stats stats() const { return stats_; } | 160 inline Stats stats() const { return stats_; } |
165 void GetClassSizes(int64 class_sizes_normal[kMaxPages], | 161 |
166 int64 class_sizes_returned[kMaxPages], | 162 struct SmallSpanStats { |
167 int64* normal_pages_in_spans, | 163 // For each free list of small spans, the length (in spans) of the |
168 int64* returned_pages_in_spans); | 164 // normal and returned free lists for that size. |
| 165 int64 normal_length[kMaxPages]; |
| 166 int64 returned_length[kMaxPages]; |
| 167 }; |
| 168 void GetSmallSpanStats(SmallSpanStats* result); |
| 169 |
| 170 // Stats for free large spans (i.e., spans with more than kMaxPages pages). |
| 171 struct LargeSpanStats { |
| 172 int64 spans; // Number of such spans |
| 173 int64 normal_pages; // Combined page length of normal large spans |
| 174 int64 returned_pages; // Combined page length of unmapped spans |
| 175 }; |
| 176 void GetLargeSpanStats(LargeSpanStats* result); |
169 | 177 |
170 bool Check(); | 178 bool Check(); |
171 // Like Check() but does some more comprehensive checking. | 179 // Like Check() but does some more comprehensive checking. |
172 bool CheckExpensive(); | 180 bool CheckExpensive(); |
173 bool CheckList(Span* list, Length min_pages, Length max_pages, | 181 bool CheckList(Span* list, Length min_pages, Length max_pages, |
174 int freelist); // ON_NORMAL_FREELIST or ON_RETURNED_FREELIST | 182 int freelist); // ON_NORMAL_FREELIST or ON_RETURNED_FREELIST |
175 | 183 |
176 // Try to release at least num_pages for reuse by the OS. Returns | 184 // Try to release at least num_pages for reuse by the OS. Returns |
177 // the actual number of pages released, which may be less than | 185 // the actual number of pages released, which may be less than |
178 // num_pages if there weren't enough pages to release. The result | 186 // num_pages if there weren't enough pages to release. The result |
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294 int release_index_; | 302 int release_index_; |
295 }; | 303 }; |
296 | 304 |
297 } // namespace tcmalloc | 305 } // namespace tcmalloc |
298 | 306 |
299 #ifdef _MSC_VER | 307 #ifdef _MSC_VER |
300 #pragma warning(pop) | 308 #pragma warning(pop) |
301 #endif | 309 #endif |
302 | 310 |
303 #endif // TCMALLOC_PAGE_HEAP_H_ | 311 #endif // TCMALLOC_PAGE_HEAP_H_ |
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