be788d891d
Add a mutex in MapInfo, and a mutex in Elf. Lock the creation of an Elf file using the MapInfo mutex, and lock when calling Step, GetFunctionName, or GetSoname since they can modify information in the object. It might be beneficial to use a fine grained lock in the future. Change the Maps object to contain a vector of MapInfo pointers rather than the total objects. This avoids copying this data around. Add a test to libbacktrace to verify that sharing a map while doing unwinds in different threads works. Add concurrency tests in libunwindstack to verify the locking works. Add always inline to the RegsGetLocal arm and aarch64 functions. I had a case where clang did not inline the code, so make sure this is specified. Bug: 68813077 Test: New unit tests to cover the case. Passes all unit tests. Test: Ran a monkey test while dumping bugreports and verified that Test: no crashes in libunwind. Test: Remove the locking and verified that all of the concurrenty tests fail. Change-Id: I769e728c676f6bdae9e64ce4cdc03b6749beae03
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LIBUNWINDSTACK_REGS_GET_LOCAL_H
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#define _LIBUNWINDSTACK_REGS_GET_LOCAL_H
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namespace unwindstack {
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#if defined(__arm__)
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inline __always_inline void RegsGetLocal(Regs* regs) {
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void* reg_data = regs->RawData();
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asm volatile(
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".align 2\n"
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"bx pc\n"
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"nop\n"
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".code 32\n"
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"stmia %[base], {r0-r12}\n"
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"add %[base], #52\n"
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"mov r1, r13\n"
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"mov r2, r14\n"
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"mov r3, r15\n"
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"stmia %[base], {r1-r3}\n"
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"orr %[base], pc, #1\n"
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"bx %[base]\n"
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: [base] "+r"(reg_data)
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:
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: "memory");
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regs->SetFromRaw();
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}
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#elif defined(__aarch64__)
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inline __always_inline void RegsGetLocal(Regs* regs) {
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void* reg_data = regs->RawData();
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asm volatile(
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"1:\n"
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"stp x0, x1, [%[base], #0]\n"
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"stp x2, x3, [%[base], #16]\n"
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"stp x4, x5, [%[base], #32]\n"
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"stp x6, x7, [%[base], #48]\n"
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"stp x8, x9, [%[base], #64]\n"
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"stp x10, x11, [%[base], #80]\n"
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"stp x12, x13, [%[base], #96]\n"
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"stp x14, x15, [%[base], #112]\n"
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"stp x16, x17, [%[base], #128]\n"
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"stp x18, x19, [%[base], #144]\n"
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"stp x20, x21, [%[base], #160]\n"
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"stp x22, x23, [%[base], #176]\n"
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"stp x24, x25, [%[base], #192]\n"
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"stp x26, x27, [%[base], #208]\n"
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"stp x28, x29, [%[base], #224]\n"
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"str x30, [%[base], #240]\n"
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"mov x12, sp\n"
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"adr x13, 1b\n"
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"stp x12, x13, [%[base], #248]\n"
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: [base] "+r"(reg_data)
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:
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: "x12", "x13", "memory");
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regs->SetFromRaw();
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}
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#elif defined(__i386__) || defined(__x86_64__)
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extern "C" void AsmGetRegs(void* regs);
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inline void RegsGetLocal(Regs* regs) {
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AsmGetRegs(regs->RawData());
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regs->SetFromRaw();
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}
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#elif defined(__mips__)
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// Stub to allow mips to build.
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void RegsGetLocal(Regs*) {}
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#endif
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_REGS_GET_LOCAL_H
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