1b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik//===--------------------------- libuwind.cpp -----------------------------===// 2b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 3b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// The LLVM Compiler Infrastructure 4b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 5b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// This file is dual licensed under the MIT and the University of Illinois Open 6b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// Source Licenses. See LICENSE.TXT for details. 7b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 8b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 9b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// Implements unw_* functions from <libunwind.h> 10b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 11b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik//===----------------------------------------------------------------------===// 12b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 13b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <libunwind.h> 14b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 15e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#ifndef NDEBUG 16e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#include <cstdlib> // getenv 17e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#endif 18b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <new> 19b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 20b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "libunwind_ext.h" 21b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "config.h" 22b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 23e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#include <stdlib.h> 24e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert 25b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 26b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if _LIBUNWIND_BUILD_ZERO_COST_APIS 27b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 28b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "UnwindCursor.hpp" 29b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 30b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikusing namespace libunwind; 31b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 32b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// internal object to represent this processes address space 33b78da9875b6e35187b5d584746c78faaf3230a3dNick KledzikLocalAddressSpace LocalAddressSpace::sThisAddressSpace; 34b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 35b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// record the registers and stack position of the caller 36b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikextern int unw_getcontext(unw_context_t *); 37b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// note: unw_getcontext() implemented in assembly 38b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 39b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Create a cursor of a thread in this process given 'context' recorded by 40b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// unw_getcontext(). 41b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, 42b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_context_t *context) { 43b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_init_local(cursor=%p, context=%p)\n", 44b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, context); 45b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // Use "placement new" to allocate UnwindCursor in the cursor buffer. 46b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if __i386__ 47b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) UnwindCursor<LocalAddressSpace, Registers_x86>( 48b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik context, LocalAddressSpace::sThisAddressSpace); 49b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#elif __x86_64__ 50b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) UnwindCursor<LocalAddressSpace, Registers_x86_64>( 51b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik context, LocalAddressSpace::sThisAddressSpace); 52b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#elif __ppc__ 53b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) UnwindCursor<LocalAddressSpace, Registers_ppc>( 54b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik context, LocalAddressSpace::sThisAddressSpace); 55b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#elif __arm64__ 56b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) UnwindCursor<LocalAddressSpace, Registers_arm64>( 57b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik context, LocalAddressSpace::sThisAddressSpace); 58e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#elif LIBCXXABI_ARM_EHABI 59e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert new ((void *)cursor) UnwindCursor<LocalAddressSpace, Registers_arm>( 60e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert context, LocalAddressSpace::sThisAddressSpace); 61b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif 62b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 63b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->setInfoBasedOnIPRegister(); 64b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 65b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 66b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 67b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 68b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if UNW_REMOTE 69b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 70b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space = 71b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (unw_addr_space_t) & sThisAddressSpace; 72b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 73b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Create a cursor into a thread in another process. 74b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor, 75b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_t as, 766dc154019d5f0997d7df1d9e9f3ba1425396dcd8Nick Kledzik void *arg) { 77b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // special case: unw_init_remote(xx, unw_local_addr_space, xx) 78b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (as == (unw_addr_space_t) & sThisAddressSpace) 79b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return unw_init_local(cursor, NULL); //FIXME 80b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 81b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // use "placement new" to allocate UnwindCursor in the cursor buffer 82b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik switch (as->cpuType) { 83b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_I386: 84b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) 85b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik UnwindCursor<OtherAddressSpace<Pointer32<LittleEndian> >, 866dc154019d5f0997d7df1d9e9f3ba1425396dcd8Nick Kledzik Registers_x86>(((unw_addr_space_i386 *)as)->oas, arg); 87b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 88b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_X86_64: 89b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) UnwindCursor< 90b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik OtherAddressSpace<Pointer64<LittleEndian> >, Registers_x86_64>( 916dc154019d5f0997d7df1d9e9f3ba1425396dcd8Nick Kledzik ((unw_addr_space_x86_64 *)as)->oas, arg); 92b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 93b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_POWERPC: 94b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik new ((void *)cursor) 95b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik UnwindCursor<OtherAddressSpace<Pointer32<BigEndian> >, Registers_ppc>( 966dc154019d5f0997d7df1d9e9f3ba1425396dcd8Nick Kledzik ((unw_addr_space_ppc *)as)->oas, arg); 97b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 98b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik default: 99b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EUNSPEC; 100b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 101b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 102b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 103b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 104b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 105b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikstatic bool is64bit(task_t task) { 106b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return false; // FIXME 107b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 108b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 109b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Create an address_space object for use in examining another task. 110b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT unw_addr_space_t unw_create_addr_space_for_task(task_t task) { 111b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if __i386__ 112b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (is64bit(task)) { 113b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_x86_64 *as = new unw_addr_space_x86_64(task); 114b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik as->taskPort = task; 115b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik as->cpuType = CPU_TYPE_X86_64; 116b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik //as->oas 117b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } else { 118b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_i386 *as = new unw_addr_space_i386(task); 119b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik as->taskPort = task; 120b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik as->cpuType = CPU_TYPE_I386; 121b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik //as->oas 122b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 123b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#else 124b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// FIXME 125b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif 126b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 127b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 128b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 129b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Delete an address_space object. 130b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void unw_destroy_addr_space(unw_addr_space_t asp) { 131b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik switch (asp->cpuType) { 132b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if __i386__ || __x86_64__ 133b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_I386: { 134b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_i386 *as = (unw_addr_space_i386 *)asp; 135b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik delete as; 136b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 137b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 138b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_X86_64: { 139b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_x86_64 *as = (unw_addr_space_x86_64 *)asp; 140b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik delete as; 141b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 142b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 143b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif 144b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik case CPU_TYPE_POWERPC: { 145b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_addr_space_ppc *as = (unw_addr_space_ppc *)asp; 146b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik delete as; 147b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 148b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik break; 149b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 150b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 151b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // UNW_REMOTE 152b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 153b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 154b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Get value of specified register at cursor position in stack frame. 155b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum, 156b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t *value) { 157b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)\n", 158b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, regNum, value); 159b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 160b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (co->validReg(regNum)) { 161b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik *value = co->getReg(regNum); 162b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 163b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 164b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EBADREG; 165b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 166b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 167b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 168b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Set value of specified register at cursor position in stack frame. 169b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum, 170b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t value) { 171b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%llX)\n", 172e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert cursor, regNum, (long long)value); 173b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik typedef LocalAddressSpace::pint_t pint_t; 174b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 175b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (co->validReg(regNum)) { 176b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->setReg(regNum, (pint_t)value); 177b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // specical case altering IP to re-find info (being called by personality 178b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // function) 1794b51c92d708b5be144167e73a9e6af15a323debeJoerg Sonnenberger if (regNum == UNW_REG_IP) 180b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->setInfoBasedOnIPRegister(false); 181b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 182b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 183b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EBADREG; 184b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 185b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 186b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 187b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Get value of specified float register at cursor position in stack frame. 188b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, 189b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_fpreg_t *value) { 190b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)\n", 191b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, regNum, value); 192b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 193b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (co->validFloatReg(regNum)) { 194b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik *value = co->getFloatReg(regNum); 195b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 196b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 197b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EBADREG; 198b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 199b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 200b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 201b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Set value of specified float register at cursor position in stack frame. 202b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, 203b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_fpreg_t value) { 204e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#if LIBCXXABI_ARM_EHABI 205e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)\n", 206e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert cursor, regNum, value); 207e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#else 208b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%g)\n", 209e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert cursor, regNum, value); 210e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#endif 211b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 212b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (co->validFloatReg(regNum)) { 213b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->setFloatReg(regNum, value); 214b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 215b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 216b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EBADREG; 217b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 218b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 219b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 220b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Move cursor to next frame. 221b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_step(unw_cursor_t *cursor) { 222b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_step(cursor=%p)\n", cursor); 223b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 224b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return co->step(); 225b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 226b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 227b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 228b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Get unwind info at cursor position in stack frame. 229b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor, 230b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_proc_info_t *info) { 231b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_get_proc_info(cursor=%p, &info=%p)\n", 232b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, info); 233b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 234b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->getInfo(info); 235b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (info->end_ip == 0) 236b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ENOINFO; 237b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik else 238b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 239b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 240b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 241b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 242b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Resume execution at cursor position (aka longjump). 243b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_resume(unw_cursor_t *cursor) { 244b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_resume(cursor=%p)\n", cursor); 245b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 246b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik co->jumpto(); 247b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EUNSPEC; 248b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 249b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 250b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 251b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Get name of function at cursor position in stack frame. 252b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf, 253b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik size_t bufLen, unw_word_t *offset) { 254b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_get_proc_name(cursor=%p, &buf=%p," 255e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert "bufLen=%zu)\n", cursor, buf, bufLen); 256b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 257b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (co->getFunctionName(buf, bufLen, offset)) 258b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_ESUCCESS; 259b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik else 260b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return UNW_EUNSPEC; 261b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 262b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 263b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 264b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Checks if a register is a floating-point register. 265b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_is_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum) { 266b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_is_fpreg(cursor=%p, regNum=%d)\n", 267b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, regNum); 268b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 269b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return co->validFloatReg(regNum); 270b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 271b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 272b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 273b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Checks if a register is a floating-point register. 274b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT const char *unw_regname(unw_cursor_t *cursor, 275b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_regnum_t regNum) { 276b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_regname(cursor=%p, regNum=%d)\n", 277b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik cursor, regNum); 278b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 279b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return co->getRegisterName(regNum); 280b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 281b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 282b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 283b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Checks if current frame is signal trampoline. 284b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT int unw_is_signal_frame(unw_cursor_t *cursor) { 285b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_is_signal_frame(cursor=%p)\n", cursor); 286b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 287b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return co->isSignalFrame(); 288b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 289b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 290e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#if __arm__ 291e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert// Save VFP registers d0-d15 using FSTMIADX instead of FSTMIADD 292e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert_LIBUNWIND_EXPORT void unw_save_vfp_as_X(unw_cursor_t *cursor) { 293e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert _LIBUNWIND_TRACE_API("unw_fpreg_save_vfp_as_X(cursor=%p)\n", cursor); 294e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; 295e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert return co->saveVFPAsX(); 296e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert} 297e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#endif 298e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert 299b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 300b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if _LIBUNWIND_SUPPORT_DWARF_UNWIND 301b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// SPI: walks cached dwarf entries 302b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void unw_iterate_dwarf_unwind_cache(void (*func)( 303b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t ip_start, unw_word_t ip_end, unw_word_t fde, unw_word_t mh)) { 304b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("unw_iterate_dwarf_unwind_cache(func=%p)\n", func); 305b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik DwarfFDECache<LocalAddressSpace>::iterateCacheEntries(func); 306b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 307b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 308b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 309b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// IPI: for __register_frame() 310b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikvoid _unw_add_dynamic_fde(unw_word_t fde) { 311b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik CFI_Parser<LocalAddressSpace>::FDE_Info fdeInfo; 312b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik CFI_Parser<LocalAddressSpace>::CIE_Info cieInfo; 313b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik const char *message = CFI_Parser<LocalAddressSpace>::decodeFDE( 314b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik LocalAddressSpace::sThisAddressSpace, 315b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (LocalAddressSpace::pint_t) fde, &fdeInfo, &cieInfo); 316b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (message == NULL) { 317b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // dynamically registered FDEs don't have a mach_header group they are in. 318b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // Use fde as mh_group 319b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t mh_group = fdeInfo.fdeStart; 320b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik DwarfFDECache<LocalAddressSpace>::add((LocalAddressSpace::pint_t)mh_group, 321b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik fdeInfo.pcStart, fdeInfo.pcEnd, 322b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik fdeInfo.fdeStart); 323b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } else { 324b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_DEBUG_LOG("_unw_add_dynamic_fde: bad fde: %s", message); 325b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 326b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 327b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 328b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// IPI: for __deregister_frame() 329b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikvoid _unw_remove_dynamic_fde(unw_word_t fde) { 330b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // fde is own mh_group 331b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik DwarfFDECache<LocalAddressSpace>::removeAllIn((LocalAddressSpace::pint_t)fde); 332b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 333b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // _LIBUNWIND_SUPPORT_DWARF_UNWIND 334b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 335b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // _LIBUNWIND_BUILD_ZERO_COST_APIS 336b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 337b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 338b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 339b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// Add logging hooks in Debug builds only 340b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#ifndef NDEBUG 341e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#include <stdlib.h> 342b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 343b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_HIDDEN 344b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikbool logAPIs() { 345b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do manual lock to avoid use of _cxa_guard_acquire or initializers 346b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik static bool checked = false; 347b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik static bool log = false; 348b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (!checked) { 349b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik log = (getenv("LIBUNWIND_PRINT_APIS") != NULL); 350b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik checked = true; 351b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 352b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return log; 353b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 354b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 355b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_HIDDEN 356b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzikbool logUnwinding() { 357b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do manual lock to avoid use of _cxa_guard_acquire or initializers 358b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik static bool checked = false; 359b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik static bool log = false; 360b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (!checked) { 361b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik log = (getenv("LIBUNWIND_PRINT_UNWINDING") != NULL); 362b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik checked = true; 363b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 364b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return log; 365b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 366b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 367b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // NDEBUG 368b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 369