Added core dump handler code

Fixed author Doxygen tag

Added licence headers

Moved return value definition to new header

Converted all DOS line endings to Unix

Solution for CPU dependency by using CMAKE_SYSTEM_PROCESSOR cmake variable

CPU specific stuff is implemented in own implementation file for each CPU architecture

Added config file for sysctl. Fixed wrong parameters to open call for lockfile

Added mechanism to overwrite TARGET_CPU_NAME with command line option

Signed-off-by: Alexander Wenzel <Alexander.AW.Wenzel@bmw.de>

1 files changed, 209 insertions, 0 deletions

diff --git a/src/core_dump_handler/dlt_cdh_crashid.c b/src/core_dump_handler/dlt_cdh_crashid.c
new file mode 100644
index 0000000..905ba8b
--- /dev/null
+++ b/src/core_dump_handler/dlt_cdh_crashid.c
@@ -0,0 +1,209 @@
+/*
+ * @licence app begin@
+ * SPDX license identifier: MPL-2.0
+ *
+ * Copyright (C) 2011-2015, BMW AG
+ *
+ * This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
+ *
+ * This Source Code Form is subject to the terms of the
+ * Mozilla Public License (MPL), v. 2.0.
+ * If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For further information see http://www.genivi.org/.
+ * @licence end@
+ */
+
+/*!
+ * \author Magneti Marelli http://www.magnetimarelli.com
+ * \author Lutz Helwing <lutz_helwing@mentor.com>
+ *
+ * \copyright Copyright © 2011-2015 BMW AG. \n
+ * License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
+ *
+ * \file dlt_cdh_crashid.c
+ */
+
+#include <stdlib.h>
+#include <syslog.h>
+#include <sys/procfs.h>
+#include <sys/user.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <asm/prctl.h>
+#include <inttypes.h>
+
+#include "dlt_cdh.h"
+#include "dlt_cdh_cpuinfo.h"
+
+#ifdef HAS_CITYHASH_C
+#include "city_c.h"
+#endif
+
+//ARM32 specific
+//#define REG_FRAME_POINTER   11
+//#define REG_INSTR_POINTER   12
+//#define REG_STACK_POINTER   13
+//#define REG_LINK_REGISTER   14
+//#define REG_PROC_COUNTER    15
+
+#ifdef HAS_CITYHASH_C
+static cdh_status_t crashid_cityhash(proc_info_t* p_proc);
+#endif
+
+cdh_status_t get_phdr_num(proc_info_t* p_proc, unsigned int p_address, int *phdr_num)
+{
+    int i = 0;
+
+    if (phdr_num == NULL)
+        return CDH_NOK;
+
+    for (i = 0; i < p_proc->m_Ehdr.e_phnum; i++)
+    {
+        if (p_proc->m_pPhdr[i].p_vaddr < p_address
+                        && p_proc->m_pPhdr[i].p_vaddr + p_proc->m_pPhdr[i].p_memsz > p_address)
+        {
+            *phdr_num = i;
+            return CDH_OK;
+        }
+    }
+
+    *phdr_num = -1;
+
+    return CDH_NOK;
+}
+
+// Thanks to libunwind for the following definitions, which helps to
+#define ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL))
+#define NOTE_SIZE(_hdr) (sizeof (_hdr) + ALIGN((_hdr).n_namesz, 4) + (_hdr).n_descsz)
+
+cdh_status_t get_crashed_registers(proc_info_t* p_proc)
+{
+    int found = CDH_NOK; // CDH_OK, when we find the page note associated to PID of crashed process
+    unsigned int offset = 0;
+
+    // TODO: if no notes were found m_note_page_size was not set to 0 which leads to a crash in this loop because it is then used
+    // uninitialised here => this is an x86_64 issue
+    while (found != CDH_OK && offset < p_proc->m_note_page_size)
+    {
+        // Crash mentioned in TODO dlt_cdh_coredump.c line 163
+        ELF_Nhdr* ptr_note = (ELF_Nhdr*) (p_proc->m_Nhdr + offset);
+
+        if (ptr_note->n_type == NT_PRSTATUS)
+        {
+            // The first PRSTATUS note is the one of the crashed thread
+            prstatus_t* prstatus = (prstatus_t*) ((char*) ptr_note + sizeof(ELF_Nhdr) + ALIGN(ptr_note->n_namesz, 4));
+
+            p_proc->m_crashed_pid = prstatus->pr_pid;
+
+            get_registers(prstatus, &p_proc->m_registers);
+            found = CDH_OK;
+        }
+
+        offset += NOTE_SIZE(*ptr_note);
+    }
+
+    return found;
+}
+
+#ifdef HAS_CITYHASH_C
+
+cdh_status_t crashid_cityhash(proc_info_t* p_proc)
+{
+#define CRASHID_BUF_SIZE         MAX_PROC_NAME_LENGTH+sizeof(uint64_t)
+
+    char cityhash_in[CRASHID_BUF_SIZE];
+    uint64_t cityhash_result=0;
+    memcpy(cityhash_in, p_proc->name, MAX_PROC_NAME_LENGTH);
+    memcpy(cityhash_in+MAX_PROC_NAME_LENGTH, &p_proc->m_crashid_phase1, sizeof(uint64_t));
+
+    cityhash_result = CityHash64(cityhash_in, CRASHID_BUF_SIZE);
+    memcpy(p_proc->m_crashid, &cityhash_result, sizeof(uint64_t));
+
+    return CDH_OK;
+#undef CRASHID_BUF_SIZE
+}
+
+#endif // HAS_CITYHASH_C
+
+cdh_status_t create_crashid(proc_info_t* p_proc)
+{
+    uint32_t final_lr = 0;
+    uint32_t final_pc = 0;
+    int pc_phnum = 0;
+    int lr_phnum = 0;
+
+    // translate address from virtual address (process point of view) to offset in the stack memory page
+#define ADDRESS_REBASE(__x, __phdr_num)               (__x - p_proc->m_pPhdr[__phdr_num].p_vaddr)
+    // read value in the stack at position offset: +/- sizeof(), depends on stack growing upward or downward
+#define READ_STACK_VALUE(__offset, __type)  (*(__type*)(stack_page+__offset-sizeof(__type)))
+
+    get_phdr_num(p_proc, p_proc->m_registers.pc, &pc_phnum);
+    final_pc = ADDRESS_REBASE(p_proc->m_registers.pc, pc_phnum);
+
+    get_phdr_num(p_proc, p_proc->m_registers.lr, &lr_phnum);
+
+    if (lr_phnum >= 0)
+        final_lr = ADDRESS_REBASE(p_proc->m_registers.lr, lr_phnum);
+
+    p_proc->m_crashid_phase1 = p_proc->signal << 24;
+    p_proc->m_crashid_phase1 |= (uint64_t) final_lr;
+    p_proc->m_crashid_phase1 <<= 32;
+    p_proc->m_crashid_phase1 |= (uint64_t) final_pc;
+
+#ifdef HAS_CITYHASH_C
+    crashid_cityhash(p_proc);
+#else
+    memcpy(p_proc->m_crashid, &p_proc->m_crashid_phase1, sizeof(uint64_t));
+#endif
+
+    syslog(LOG_INFO,
+                    "Crash in \"%s\", thread=\"%s\", pid=%d, crashID=%"PRIx64", based on signal=%d, PC=0x%x, caller=0x%x",
+                    p_proc->name,
+                    p_proc->threadname,
+                    p_proc->pid,
+                    *((uint64_t*) p_proc->m_crashid),
+                    p_proc->signal,
+                    final_pc, final_lr
+                    );
+
+    return CDH_OK;
+}
+
+int write_crashid_to_filesystem(proc_info_t* p_proc)
+{
+    FILE* crashid_file = NULL;
+
+    if ((crashid_file = fopen(CRASHID_FILE, "wt")) == NULL)
+    {
+        syslog(LOG_ERR, "(pid=%d) cannot write crashid to %s: %s", p_proc->pid, CRASHID_FILE, strerror(errno));
+        return CDH_NOK;
+    }
+
+    fprintf(crashid_file, "%"PRIx64, *(uint64_t*) p_proc->m_crashid);
+    fclose(crashid_file);
+
+    return CDH_OK;
+}
+
+cdh_status_t treat_crash_data(proc_info_t* p_proc)
+{
+    if (get_crashed_registers(p_proc) != CDH_OK)
+    {
+        syslog(LOG_ERR, "registers not found in notes");
+        return CDH_NOK;
+    }
+
+    if (create_crashid(p_proc) != CDH_OK)
+    {
+        syslog(LOG_ERR, "crashid not generated");
+        return CDH_NOK;
+    }
+
+    write_crashid_to_filesystem(p_proc);
+
+    return CDH_OK;
+}
+