kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1 | // Copyright 2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_JUMP_TARGET_H_ |
| 29 | #define V8_JUMP_TARGET_H_ |
| 30 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 31 | #if V8_TARGET_ARCH_IA32 |
| 32 | #include "jump-target-heavy.h" |
| 33 | #elif V8_TARGET_ARCH_X64 |
| 34 | #include "jump-target-heavy.h" |
| 35 | #elif V8_TARGET_ARCH_ARM |
| 36 | #include "jump-target-light.h" |
| 37 | #elif V8_TARGET_ARCH_MIPS |
| 38 | #include "jump-target-light.h" |
| 39 | #else |
| 40 | #error Unsupported target architecture. |
| 41 | #endif |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 42 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 43 | namespace v8 { |
| 44 | namespace internal { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 45 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 46 | // ------------------------------------------------------------------------- |
| 47 | // Shadow break targets |
| 48 | // |
| 49 | // A shadow break target represents a break target that is temporarily |
| 50 | // shadowed by another one (represented by the original during |
| 51 | // shadowing). They are used to catch jumps to labels in certain |
| 52 | // contexts, e.g. try blocks. After shadowing ends, the formerly |
| 53 | // shadowed target is again represented by the original and the |
| 54 | // ShadowTarget can be used as a jump target in its own right, |
| 55 | // representing the formerly shadowing target. |
| 56 | |
| 57 | class ShadowTarget : public BreakTarget { |
| 58 | public: |
| 59 | // Construct a shadow jump target. After construction the shadow |
| 60 | // target object holds the state of the original target, and the |
| 61 | // original target is actually a fresh one that intercepts control |
| 62 | // flow intended for the shadowed one. |
| 63 | explicit ShadowTarget(BreakTarget* shadowed); |
| 64 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 65 | virtual ~ShadowTarget() {} |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 66 | |
| 67 | // End shadowing. After shadowing ends, the original jump target |
| 68 | // again gives access to the formerly shadowed target and the shadow |
| 69 | // target object gives access to the formerly shadowing target. |
| 70 | void StopShadowing(); |
| 71 | |
| 72 | // During shadowing, the currently shadowing target. After |
| 73 | // shadowing, the target that was shadowed. |
| 74 | BreakTarget* other_target() const { return other_target_; } |
| 75 | |
| 76 | private: |
| 77 | // During shadowing, the currently shadowing target. After |
| 78 | // shadowing, the target that was shadowed. |
| 79 | BreakTarget* other_target_; |
| 80 | |
| 81 | #ifdef DEBUG |
| 82 | bool is_shadowing_; |
| 83 | #endif |
| 84 | |
| 85 | DISALLOW_COPY_AND_ASSIGN(ShadowTarget); |
| 86 | }; |
| 87 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 88 | } } // namespace v8::internal |
| 89 | |
| 90 | #endif // V8_JUMP_TARGET_H_ |