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/*
*
* Copyright 2014, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/user.h>
#include <sys/uio.h>
#include <linux/elf.h>
#include "../utility.h"
#include "../machine.h"
/* enable to dump memory pointed to by every register */
#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
/*
* If configured to do so, dump memory around *all* registers
* for the crashing thread.
*/
void dump_memory_and_code(log_t* log, pid_t tid, int scope_flags) {
struct user_pt_regs regs;
struct iovec io;
io.iov_base = ®s;
io.iov_len = sizeof(regs);
if (ptrace(PTRACE_GETREGSET, tid, (void*)NT_PRSTATUS, &io) == -1) {
_LOG(log, scope_flags, "%s: ptrace failed to get registers: %s\n",
__func__, strerror(errno));
return;
}
if (IS_AT_FAULT(scope_flags) && DUMP_MEMORY_FOR_ALL_REGISTERS) {
for (int reg = 0; reg < 31; reg++) {
uintptr_t addr = regs.regs[reg];
/*
* Don't bother if it looks like a small int or ~= null, or if
* it's in the kernel area.
*/
if (addr < 4096 || addr >= (1UL<<63)) {
continue;
}
_LOG(log, scope_flags | SCOPE_SENSITIVE, "\nmemory near x%d:\n", reg);
dump_memory(log, tid, addr, scope_flags | SCOPE_SENSITIVE);
}
}
_LOG(log, scope_flags, "\ncode around pc:\n");
dump_memory(log, tid, (uintptr_t)regs.pc, scope_flags);
if (regs.pc != regs.sp) {
_LOG(log, scope_flags, "\ncode around sp:\n");
dump_memory(log, tid, (uintptr_t)regs.sp, scope_flags);
}
}
void dump_registers(log_t* log, pid_t tid, int scope_flags)
{
struct user_pt_regs r;
struct iovec io;
io.iov_base = &r;
io.iov_len = sizeof(r);
bool only_in_tombstone = !IS_AT_FAULT(scope_flags);
if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
_LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
return;
}
for (int i = 0; i < 28; i += 4) {
_LOG(log, scope_flags, " x%-2d %016lx x%-2d %016lx x%-2d %016lx x%-2d %016lx\n",
i, (uint64_t)r.regs[i],
i+1, (uint64_t)r.regs[i+1],
i+2, (uint64_t)r.regs[i+2],
i+3, (uint64_t)r.regs[i+3]);
}
_LOG(log, scope_flags, " x28 %016lx x29 %016lx x30 %016lx\n",
(uint64_t)r.regs[28], (uint64_t)r.regs[29], (uint64_t)r.regs[30]);
_LOG(log, scope_flags, " sp %016lx pc %016lx\n",
(uint64_t)r.sp, (uint64_t)r.pc);
struct user_fpsimd_state f;
io.iov_base = &f;
io.iov_len = sizeof(f);
if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
_LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
return;
}
for (int i = 0; i < 32; i += 4) {
_LOG(log, scope_flags, " v%-2d %016lx v%-2d %016lx v%-2d %016lx v%-2d %016lx\n",
i, (uint64_t)f.vregs[i],
i+1, (uint64_t)f.vregs[i+1],
i+2, (uint64_t)f.vregs[i+2],
i+3, (uint64_t)f.vregs[i+3]);
}
}
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