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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef StackFrameDepth_h | 5 #ifndef StackFrameDepth_h |
6 #define StackFrameDepth_h | 6 #define StackFrameDepth_h |
7 | 7 |
8 #include "platform/PlatformExport.h" | 8 #include "platform/PlatformExport.h" |
9 #include "wtf/Assertions.h" | 9 #include "wtf/Assertions.h" |
10 #include <stdint.h> | 10 #include <stdint.h> |
11 | 11 |
12 namespace blink { | 12 namespace blink { |
13 | 13 |
14 // StackFrameDepth keeps track of current call stack frame depth. | 14 // StackFrameDepth keeps track of current call stack frame depth. |
15 // Use isSafeToRecurse() to query if there is a room in current | 15 // Use isSafeToRecurse() to query if there is a room in current |
16 // call stack for more recursive call. | 16 // call stack for more recursive call. |
17 class PLATFORM_EXPORT StackFrameDepth final { | 17 class PLATFORM_EXPORT StackFrameDepth final { |
18 public: | 18 public: |
19 inline static bool isSafeToRecurse() | 19 inline static bool isSafeToRecurse() |
20 { | 20 { |
21 ASSERT(s_stackFrameLimit); | 21 ASSERT(s_stackFrameLimit || !s_isEnabled); |
22 | 22 |
23 // Asssume that the stack grows towards lower addresses, which | 23 // Asssume that the stack grows towards lower addresses, which |
24 // all the ABIs currently supported do. | 24 // all the ABIs currently supported do. |
25 // | 25 // |
26 // A unit test checks that the assumption holds for a target | 26 // A unit test checks that the assumption holds for a target |
27 // (HeapTest.StackGrowthDirection.) | 27 // (HeapTest.StackGrowthDirection.) |
28 return currentStackFrame() > s_stackFrameLimit; | 28 return currentStackFrame() > s_stackFrameLimit; |
29 } | 29 } |
30 static void configureStackLimit(); | 30 |
| 31 static void enableStackLimit(); |
| 32 static void disableStackLimit() |
| 33 { |
| 34 s_stackFrameLimit = 0; |
| 35 #if ENABLE(ASSERT) |
| 36 s_isEnabled = false; |
| 37 #endif |
| 38 } |
| 39 |
| 40 #if ENABLE(ASSERT) |
| 41 inline static bool isEnabled() { return s_isEnabled; } |
| 42 #endif |
| 43 |
31 static size_t getUnderestimatedStackSize(); | 44 static size_t getUnderestimatedStackSize(); |
32 static void* getStackStart(); | 45 static void* getStackStart(); |
33 | 46 |
34 #if COMPILER(MSVC) | 47 #if COMPILER(MSVC) |
35 // Ignore C4172: returning address of local variable or temporary: dummy. This | 48 // Ignore C4172: returning address of local variable or temporary: dummy. This |
36 // warning suppression has to go outside of the function to take effect. | 49 // warning suppression has to go outside of the function to take effect. |
37 #pragma warning(push) | 50 #pragma warning(push) |
38 #pragma warning(disable: 4172) | 51 #pragma warning(disable: 4172) |
39 #endif | 52 #endif |
40 static uintptr_t currentStackFrame(const char* dummy = nullptr) | 53 static uintptr_t currentStackFrame(const char* dummy = nullptr) |
(...skipping 10 matching lines...) Expand all Loading... |
51 #if COMPILER(MSVC) | 64 #if COMPILER(MSVC) |
52 #pragma warning(pop) | 65 #pragma warning(pop) |
53 #endif | 66 #endif |
54 | 67 |
55 private: | 68 private: |
56 // The maximum depth of eager, unrolled trace() calls that is | 69 // The maximum depth of eager, unrolled trace() calls that is |
57 // considered safe and allowed. | 70 // considered safe and allowed. |
58 static const int kSafeStackFrameSize = 32 * 1024; | 71 static const int kSafeStackFrameSize = 32 * 1024; |
59 | 72 |
60 static uintptr_t s_stackFrameLimit; | 73 static uintptr_t s_stackFrameLimit; |
| 74 #if ENABLE(ASSERT) |
| 75 static bool s_isEnabled; |
| 76 #endif |
| 77 }; |
| 78 |
| 79 class StackFrameDepthScope { |
| 80 public: |
| 81 StackFrameDepthScope() |
| 82 { |
| 83 StackFrameDepth::enableStackLimit(); |
| 84 ASSERT(StackFrameDepth::isSafeToRecurse()); |
| 85 } |
| 86 |
| 87 ~StackFrameDepthScope() |
| 88 { |
| 89 StackFrameDepth::disableStackLimit(); |
| 90 } |
61 }; | 91 }; |
62 | 92 |
63 } // namespace blink | 93 } // namespace blink |
64 | 94 |
65 #endif // StackFrameDepth_h | 95 #endif // StackFrameDepth_h |
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