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Side by Side Diff: runtime/vm/signal_handler_linux.cc

Issue 2965823002: [profiler, linux/android] Check whether a sample is ARM or Thumb code to decide which FP register t… (Closed)
Patch Set: explicit compare Created 3 years, 5 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" 5 #include "vm/globals.h"
6 #include "vm/instructions.h" 6 #include "vm/instructions.h"
7 #include "vm/simulator.h" 7 #include "vm/simulator.h"
8 #include "vm/signal_handler.h" 8 #include "vm/signal_handler.h"
9 #if defined(HOST_OS_LINUX) 9 #if defined(HOST_OS_LINUX)
10 10
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29 29
30 30
31 uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) { 31 uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) {
32 uintptr_t fp = 0; 32 uintptr_t fp = 0;
33 33
34 #if defined(HOST_ARCH_IA32) 34 #if defined(HOST_ARCH_IA32)
35 fp = static_cast<uintptr_t>(mcontext.gregs[REG_EBP]); 35 fp = static_cast<uintptr_t>(mcontext.gregs[REG_EBP]);
36 #elif defined(HOST_ARCH_X64) 36 #elif defined(HOST_ARCH_X64)
37 fp = static_cast<uintptr_t>(mcontext.gregs[REG_RBP]); 37 fp = static_cast<uintptr_t>(mcontext.gregs[REG_RBP]);
38 #elif defined(HOST_ARCH_ARM) 38 #elif defined(HOST_ARCH_ARM)
39 fp = static_cast<uintptr_t>(mcontext.arm_fp); 39 // B1.3.3 Program Status Registers (PSRs)
40 if ((mcontext.arm_cpsr & (1 << 5)) != 0) {
41 // Thumb mode.
42 fp = static_cast<uintptr_t>(mcontext.arm_r7);
43 } else {
44 // ARM mode.
45 fp = static_cast<uintptr_t>(mcontext.arm_fp);
46 }
40 #elif defined(HOST_ARCH_ARM64) 47 #elif defined(HOST_ARCH_ARM64)
41 fp = static_cast<uintptr_t>(mcontext.regs[29]); 48 fp = static_cast<uintptr_t>(mcontext.regs[29]);
42 #else 49 #else
43 #error Unsupported architecture. 50 #error Unsupported architecture.
44 #endif // HOST_ARCH_... 51 #endif // HOST_ARCH_...
45 52
46 return fp; 53 return fp;
47 } 54 }
48 55
49 56
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111 sigemptyset(&act.sa_mask); 118 sigemptyset(&act.sa_mask);
112 act.sa_flags = 0; 119 act.sa_flags = 0;
113 int r = sigaction(SIGPROF, &act, NULL); 120 int r = sigaction(SIGPROF, &act, NULL);
114 ASSERT(r == 0); 121 ASSERT(r == 0);
115 } 122 }
116 123
117 124
118 } // namespace dart 125 } // namespace dart
119 126
120 #endif // defined(HOST_OS_LINUX) 127 #endif // defined(HOST_OS_LINUX)
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