packages/mysql5
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
mysql5/mysql-5.7.27/mysys/stacktrace.c

803 lines
19 KiB
C
Raw Blame History

/* Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "my_stacktrace.h"
#ifndef _WIN32
#include "my_thread.h"
#include "m_string.h"
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STACKTRACE
#ifdef __linux__
#include <ctype.h> /* isprint */
#include <sys/syscall.h> /* SYS_gettid */
#endif
#if HAVE_EXECINFO_H
#include <execinfo.h>
#endif
#ifdef __linux__
/* __bss_start doesn't seem to work on FreeBSD and doesn't exist on OSX/Solaris. */
#define PTR_SANE(p) ((p) && (char*)(p) >= heap_start && (char*)(p) <= heap_end)
static char *heap_start;
extern char *__bss_start;
#else
#define PTR_SANE(p) (p)
#endif /* __linux */
void my_init_stacktrace()
{
#ifdef __linux__
heap_start = (char*) &__bss_start;
#endif /* __linux__ */
}
#ifdef __linux__
static void print_buffer(char *buffer, size_t count)
{
const char s[]= " ";
for (; count && *buffer; --count)
{
my_write_stderr(isprint(*buffer) ? buffer : s, 1);
++buffer;
}
}
/**
Access the pages of this process through /proc/self/task/<tid>/mem
in order to safely print the contents of a memory address range.
@param addr The address at the start of the memory region.
@param max_len The length of the memory region.
@return Zero on success.
*/
static int safe_print_str(const char *addr, int max_len)
{
int fd;
pid_t tid;
off_t offset;
ssize_t nbytes= 0;
size_t total, count;
char buf[256];
tid= (pid_t) syscall(SYS_gettid);
sprintf(buf, "/proc/self/task/%d/mem", tid);
if ((fd= open(buf, O_RDONLY)) < 0)
return -1;
/* Ensure that off_t can hold a pointer. */
compile_time_assert(sizeof(off_t) >= sizeof(intptr));
total= max_len;
offset= (intptr) addr;
/* Read up to the maximum number of bytes. */
while (total)
{
count= MY_MIN(sizeof(buf), total);
if ((nbytes= pread(fd, buf, count, offset)) < 0)
{
/* Just in case... */
if (errno == EINTR)
continue;
else
break;
}
/* Advance offset into memory. */
total-= nbytes;
offset+= nbytes;
addr+= nbytes;
/* Output the printable characters. */
print_buffer(buf, nbytes);
/* Break if less than requested... */
if ((count - nbytes))
break;
}
/* Output a new line if something was printed. */
if (total != (size_t) max_len)
my_safe_printf_stderr("%s", "\n");
if (nbytes == -1)
my_safe_printf_stderr("Can't read from address %p\n", addr);
close(fd);
return 0;
}
#endif /* __linux __ */
void my_safe_puts_stderr(const char* val, size_t max_len)
{
#ifdef __linux__
/* Only needed by the linux version of PTR_SANE */
char *heap_end;
if (!safe_print_str(val, max_len))
return;
heap_end= (char*) sbrk(0);
#endif
if (!PTR_SANE(val))
{
my_safe_printf_stderr("%s", "is an invalid pointer\n");
return;
}
for (; max_len && PTR_SANE(val) && *val; --max_len)
my_write_stderr((val++), 1);
my_safe_printf_stderr("%s", "\n");
}
#if defined(HAVE_PRINTSTACK)
/* Use Solaris' symbolic stack trace routine. */
#include <ucontext.h>
void my_print_stacktrace(uchar* stack_bottom MY_ATTRIBUTE((unused)),
ulong thread_stack MY_ATTRIBUTE((unused)))
{
if (printstack(fileno(stderr)) == -1)
my_safe_printf_stderr("%s",
"Error when traversing the stack, stack appears corrupt.\n");
else
my_safe_printf_stderr("Please read "
"http://dev.mysql.com/doc/refman/%u.%u/en/resolve-stack-dump.html\n"
"and follow instructions on how to resolve the stack trace.\n"
"Resolved stack trace is much more helpful in diagnosing the\n"
"problem, so please do resolve it\n",
MYSQL_VERSION_MAJOR, MYSQL_VERSION_MINOR);
}
#elif HAVE_BACKTRACE
#if HAVE_ABI_CXA_DEMANGLE
char MY_ATTRIBUTE ((weak)) *
my_demangle(const char *mangled_name MY_ATTRIBUTE((unused)),
int *status MY_ATTRIBUTE((unused)))
{
return NULL;
}
static void my_demangle_symbols(char **addrs, int n)
{
int status, i;
char *begin, *end, *demangled;
for (i= 0; i < n; i++)
{
demangled= NULL;
begin= strchr(addrs[i], '(');
end= begin ? strchr(begin, '+') : NULL;
if (begin && end)
{
*begin++= *end++= '\0';
demangled= my_demangle(begin, &status);
if (!demangled || status)
{
demangled= NULL;
begin[-1]= '(';
end[-1]= '+';
}
}
if (demangled)
my_safe_printf_stderr("%s(%s+%s\n", addrs[i], demangled, end);
else
my_safe_printf_stderr("%s\n", addrs[i]);
}
}
#endif /* HAVE_ABI_CXA_DEMANGLE */
void my_print_stacktrace(uchar* stack_bottom, ulong thread_stack)
{
void *addrs[128];
char **strings= NULL;
int n = backtrace(addrs, array_elements(addrs));
my_safe_printf_stderr("stack_bottom = %p thread_stack 0x%lx\n",
stack_bottom, thread_stack);
#if HAVE_ABI_CXA_DEMANGLE
if ((strings= backtrace_symbols(addrs, n)))
{
my_demangle_symbols(strings, n);
free(strings);
}
#endif
if (!strings)
{
backtrace_symbols_fd(addrs, n, fileno(stderr));
}
}
#endif /* HAVE_PRINTSTACK || HAVE_BACKTRACE */
#endif /* HAVE_STACKTRACE */
/* Produce a core for the thread */
void my_write_core(int sig)
{
signal(sig, SIG_DFL);
pthread_kill(my_thread_self(), sig);
#if defined(P_MYID)
/* On Solaris, the above kill is not enough */
sigsend(P_PID,P_MYID,sig);
#endif
}
#else /* _WIN32*/
#include <dbghelp.h>
#include <tlhelp32.h>
#if _MSC_VER
#pragma comment(lib, "dbghelp")
#endif
static EXCEPTION_POINTERS *exception_ptrs;
#define MODULE64_SIZE_WINXP 576
#define STACKWALK_MAX_FRAMES 64
void my_init_stacktrace()
{
}
void my_set_exception_pointers(EXCEPTION_POINTERS *ep)
{
exception_ptrs = ep;
}
/*
Appends directory to symbol path.
*/
static void add_to_symbol_path(char *path, size_t path_buffer_size,
char *dir, size_t dir_buffer_size)
{
strcat_s(dir, dir_buffer_size, ";");
if (!strstr(path, dir))
{
strcat_s(path, path_buffer_size, dir);
}
}
/*
Get symbol path - semicolon-separated list of directories to search for debug
symbols. We expect PDB in the same directory as corresponding exe or dll,
so the path is build from directories of the loaded modules. If environment
variable _NT_SYMBOL_PATH is set, it's value appended to the symbol search path
*/
static void get_symbol_path(char *path, size_t size)
{
HANDLE hSnap;
char *envvar;
char *p;
#ifndef DBUG_OFF
static char pdb_debug_dir[MAX_PATH + 7];
#endif
path[0]= '\0';
#ifndef DBUG_OFF
/*
Add "debug" subdirectory of the application directory, sometimes PDB will
placed here by installation.
*/
GetModuleFileName(NULL, pdb_debug_dir, MAX_PATH);
p= strrchr(pdb_debug_dir, '\\');
if(p)
{
*p= 0;
strcat_s(pdb_debug_dir, sizeof(pdb_debug_dir), "\\debug;");
add_to_symbol_path(path, size, pdb_debug_dir, sizeof(pdb_debug_dir));
}
#endif
/*
Enumerate all modules, and add their directories to the path.
Avoid duplicate entries.
*/
hSnap= CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, GetCurrentProcessId());
if (hSnap != INVALID_HANDLE_VALUE)
{
BOOL ret;
MODULEENTRY32 mod;
mod.dwSize= sizeof(MODULEENTRY32);
for (ret= Module32First(hSnap, &mod); ret; ret= Module32Next(hSnap, &mod))
{
char *module_dir= mod.szExePath;
p= strrchr(module_dir,'\\');
if (!p)
{
/*
Path separator was not found. Not known to happen, if ever happens,
will indicate current directory.
*/
module_dir[0]= '.';
module_dir[1]= '\0';
}
else
{
*p= '\0';
}
add_to_symbol_path(path, size, module_dir,sizeof(mod.szExePath));
}
CloseHandle(hSnap);
}
/* Add _NT_SYMBOL_PATH, if present. */
envvar= getenv("_NT_SYMBOL_PATH");
if(envvar)
{
strcat_s(path, size, envvar);
}
}
#define MAX_SYMBOL_PATH 32768
/* Platform SDK in VS2003 does not have definition for SYMOPT_NO_PROMPTS*/
#ifndef SYMOPT_NO_PROMPTS
#define SYMOPT_NO_PROMPTS 0
#endif
void my_print_stacktrace(uchar* unused1, ulong unused2)
{
HANDLE hProcess= GetCurrentProcess();
HANDLE hThread= GetCurrentThread();
static IMAGEHLP_MODULE64 module= {sizeof(module)};
static IMAGEHLP_SYMBOL64_PACKAGE package;
DWORD64 addr;
DWORD machine;
int i;
CONTEXT context;
STACKFRAME64 frame={0};
static char symbol_path[MAX_SYMBOL_PATH];
if(!exception_ptrs)
return;
/* Copy context, as stackwalking on original will unwind the stack */
context = *(exception_ptrs->ContextRecord);
/*Initialize symbols.*/
SymSetOptions(SYMOPT_LOAD_LINES|SYMOPT_NO_PROMPTS|SYMOPT_DEFERRED_LOADS|SYMOPT_DEBUG);
get_symbol_path(symbol_path, sizeof(symbol_path));
SymInitialize(hProcess, symbol_path, TRUE);
/*Prepare stackframe for the first StackWalk64 call*/
frame.AddrFrame.Mode= frame.AddrPC.Mode= frame.AddrStack.Mode= AddrModeFlat;
#if (defined _M_IX86)
machine= IMAGE_FILE_MACHINE_I386;
frame.AddrFrame.Offset= context.Ebp;
frame.AddrPC.Offset= context.Eip;
frame.AddrStack.Offset= context.Esp;
#elif (defined _M_X64)
machine = IMAGE_FILE_MACHINE_AMD64;
frame.AddrFrame.Offset= context.Rbp;
frame.AddrPC.Offset= context.Rip;
frame.AddrStack.Offset= context.Rsp;
#else
/*There is currently no need to support IA64*/
#pragma error ("unsupported architecture")
#endif
package.sym.SizeOfStruct= sizeof(package.sym);
package.sym.MaxNameLength= sizeof(package.name);
/*Walk the stack, output useful information*/
for(i= 0; i< STACKWALK_MAX_FRAMES;i++)
{
DWORD64 function_offset= 0;
DWORD line_offset= 0;
IMAGEHLP_LINE64 line= {sizeof(line)};
BOOL have_module= FALSE;
BOOL have_symbol= FALSE;
BOOL have_source= FALSE;
if(!StackWalk64(machine, hProcess, hThread, &frame, &context, 0, 0, 0 ,0))
break;
addr= frame.AddrPC.Offset;
have_module= SymGetModuleInfo64(hProcess,addr,&module);
#ifdef _M_IX86
if(!have_module)
{
/*
ModuleInfo structure has been "compatibly" extended in releases after XP,
and its size was increased. To make XP dbghelp.dll function
happy, pretend passing the old structure.
*/
module.SizeOfStruct= MODULE64_SIZE_WINXP;
have_module= SymGetModuleInfo64(hProcess, addr, &module);
}
#endif
have_symbol= SymGetSymFromAddr64(hProcess, addr, &function_offset,
&(package.sym));
have_source= SymGetLineFromAddr64(hProcess, addr, &line_offset, &line);
my_safe_printf_stderr("%p ", addr);
if(have_module)
{
char *base_image_name= strrchr(module.ImageName, '\\');
if(base_image_name)
base_image_name++;
else
base_image_name= module.ImageName;
my_safe_printf_stderr("%s!", base_image_name);
}
if(have_symbol)
my_safe_printf_stderr("%s()", package.sym.Name);
else if(have_module)
my_safe_printf_stderr("%s", "???");
if(have_source)
{
char *base_file_name= strrchr(line.FileName, '\\');
if(base_file_name)
base_file_name++;
else
base_file_name= line.FileName;
my_safe_printf_stderr("[%s:%u]",
base_file_name, line.LineNumber);
}
my_safe_printf_stderr("%s", "\n");
}
}
/*
Write dump. The dump is created in current directory,
file name is constructed from executable name plus
".dmp" extension
*/
void my_write_core(int unused)
{
char path[MAX_PATH];
char dump_fname[MAX_PATH]= "core.dmp";
if(!exception_ptrs)
return;
if(GetModuleFileName(NULL, path, sizeof(path)))
{
_splitpath(path, NULL, NULL,dump_fname,NULL);
strncat(dump_fname, ".dmp", sizeof(dump_fname));
}
my_create_minidump(dump_fname, 0, 0);
}
/** Create a minidump.
@param name path of minidump file.
@param process HANDLE to process. (0 for own process).
@param pid Process id.
*/
void my_create_minidump(const char *name, HANDLE process, DWORD pid)
{
char path[MAX_PATH];
MINIDUMP_EXCEPTION_INFORMATION info;
HANDLE hFile;
if (process == 0)
{
/* Does not need to CloseHandle() for the below. */
process= GetCurrentProcess();
pid= GetCurrentProcessId();
info.ExceptionPointers= exception_ptrs;
info.ClientPointers= FALSE;
info.ThreadId= GetCurrentThreadId();
}
hFile= CreateFile(name, GENERIC_WRITE, 0, 0, CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL, 0);
if(hFile)
{
MINIDUMP_TYPE mdt= (MINIDUMP_TYPE) (MiniDumpNormal |
MiniDumpWithThreadInfo |
MiniDumpWithProcessThreadData);
/* Create minidump, use info only if same process. */
if(MiniDumpWriteDump(process, pid, hFile, mdt,
process ? NULL : &info, 0, 0))
{
my_safe_printf_stderr("Minidump written to %s\n",
_fullpath(path, name, sizeof(path)) ?
path : name);
}
else
{
my_safe_printf_stderr("MiniDumpWriteDump() failed, last error %d\n",
GetLastError());
}
CloseHandle(hFile);
}
else
{
my_safe_printf_stderr("CreateFile(%s) failed, last error %d\n",
name, GetLastError());
}
}
void my_safe_puts_stderr(const char *val, size_t len)
{
__try
{
my_write_stderr(val, len);
my_safe_printf_stderr("%s", "\n");
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
my_safe_printf_stderr("%s", "is an invalid string pointer\n");
}
}
#endif /* _WIN32 */
#ifdef _WIN32
size_t my_write_stderr(const void *buf, size_t count)
{
DWORD bytes_written;
SetFilePointer(GetStdHandle(STD_ERROR_HANDLE), 0, NULL, FILE_END);
WriteFile(GetStdHandle(STD_ERROR_HANDLE), buf, (DWORD)count, &bytes_written, NULL);
return bytes_written;
}
#else
size_t my_write_stderr(const void *buf, size_t count)
{
return (size_t) write(STDERR_FILENO, buf, count);
}
#endif
static const char digits[]= "0123456789abcdef";
char *my_safe_utoa(int base, ulonglong val, char *buf)
{
*buf--= 0;
do {
*buf--= digits[val % base];
} while ((val /= base) != 0);
return buf + 1;
}
char *my_safe_itoa(int base, longlong val, char *buf)
{
char *orig_buf= buf;
const my_bool is_neg= (val < 0);
*buf--= 0;
if (is_neg)
val= -val;
if (is_neg && base == 16)
{
int ix;
val-= 1;
for (ix= 0; ix < 16; ++ix)
buf[-ix]= '0';
}
do {
*buf--= digits[val % base];
} while ((val /= base) != 0);
if (is_neg && base == 10)
*buf--= '-';
if (is_neg && base == 16)
{
int ix;
buf= orig_buf - 1;
for (ix= 0; ix < 16; ++ix, --buf)
{
switch (*buf)
{
case '0': *buf= 'f'; break;
case '1': *buf= 'e'; break;
case '2': *buf= 'd'; break;
case '3': *buf= 'c'; break;
case '4': *buf= 'b'; break;
case '5': *buf= 'a'; break;
case '6': *buf= '9'; break;
case '7': *buf= '8'; break;
case '8': *buf= '7'; break;
case '9': *buf= '6'; break;
case 'a': *buf= '5'; break;
case 'b': *buf= '4'; break;
case 'c': *buf= '3'; break;
case 'd': *buf= '2'; break;
case 'e': *buf= '1'; break;
case 'f': *buf= '0'; break;
}
}
}
return buf+1;
}
static const char *check_longlong(const char *fmt, my_bool *have_longlong)
{
*have_longlong= FALSE;
if (*fmt == 'l')
{
fmt++;
if (*fmt != 'l')
*have_longlong= (sizeof(long) == sizeof(longlong));
else
{
fmt++;
*have_longlong= TRUE;
}
}
return fmt;
}
static size_t my_safe_vsnprintf(char *to, size_t size,
const char* format, va_list ap)
{
char *start= to;
char *end= start + size - 1;
for (; *format; ++format)
{
my_bool have_longlong = FALSE;
if (*format != '%')
{
if (to == end) /* end of buffer */
break;
*to++= *format; /* copy ordinary char */
continue;
}
++format; /* skip '%' */
format= check_longlong(format, &have_longlong);
switch (*format)
{
case 'd':
case 'i':
case 'u':
case 'x':
case 'p':
{
longlong ival= 0;
ulonglong uval = 0;
if (*format == 'p')
have_longlong= (sizeof(void *) == sizeof(longlong));
if (have_longlong)
{
if (*format == 'u')
uval= va_arg(ap, ulonglong);
else
ival= va_arg(ap, longlong);
}
else
{
if (*format == 'u')
uval= va_arg(ap, unsigned int);
else
ival= va_arg(ap, int);
}
{
char buff[22];
const int base= (*format == 'x' || *format == 'p') ? 16 : 10;
char *val_as_str= (*format == 'u') ?
my_safe_utoa(base, uval, &buff[sizeof(buff)-1]) :
my_safe_itoa(base, ival, &buff[sizeof(buff)-1]);
/*
Strip off "ffffffff" if we have 'x' format without 'll'
Similarly for 'p' format on 32bit systems.
*/
if (base == 16 && !have_longlong && ival < 0)
val_as_str+= 8;
while (*val_as_str && to < end)
*to++= *val_as_str++;
continue;
}
}
case 's':
{
const char *val= va_arg(ap, char*);
if (!val)
val= "(null)";
while (*val && to < end)
*to++= *val++;
continue;
}
}
}
*to= 0;
return to - start;
}
size_t my_safe_snprintf(char* to, size_t n, const char* fmt, ...)
{
size_t result;
va_list args;
va_start(args,fmt);
result= my_safe_vsnprintf(to, n, fmt, args);
va_end(args);
return result;
}
size_t my_safe_printf_stderr(const char* fmt, ...)
{
char to[512];
size_t result;
va_list args;
va_start(args,fmt);
result= my_safe_vsnprintf(to, sizeof(to), fmt, args);
va_end(args);
my_write_stderr(to, result);
return result;
}
void my_safe_print_system_time()
{
char hrs_buf[3]= "00";
char mins_buf[3]= "00";
char secs_buf[3]= "00";
int base= 10;
#ifdef _WIN32
SYSTEMTIME utc_time;
long hrs, mins, secs;
GetSystemTime(&utc_time);
hrs= utc_time.wHour;
mins= utc_time.wMinute;
secs= utc_time.wSecond;
#else
/* Using time() instead of my_time() to avoid looping */
const time_t curr_time= time(NULL);
/* Calculate time of day */
const long tmins = curr_time / 60;
const long thrs = tmins / 60;
const long hrs = thrs % 24;
const long mins = tmins % 60;
const long secs = curr_time % 60;
#endif
my_safe_itoa(base, hrs, &hrs_buf[2]);
my_safe_itoa(base, mins, &mins_buf[2]);
my_safe_itoa(base, secs, &secs_buf[2]);
my_safe_printf_stderr("---------- %s:%s:%s UTC - ",
hrs_buf, mins_buf, secs_buf);
}
Reference in New Issue View Git Blame Copy Permalink