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tracy/public/client/TracyCallstack.cpp
Bartosz Taudul 6f9dfc8469
Use dladdr, not libbacktrace in fast callstack decode path. 
DecodeCallstackPtrFast() may be called outside the symbol processing thread,
for example in the crash handler. Using the less-capable dladdr functionality
doesn't have a big impact here. Callstack decoding in this context is used to
remove the uninteresting top part of the callstack, so that the callstack ends
at the crashing function, and not in the crash handler. Even if this
functionality would be impacted by this change, the damage done is close to
none.

The other alternative is to use locking each time a libbacktrace is to be
used, which does not seem to be worthy to do, considering that the problem
only occurs in a very rare code path.

NB everything was working when it was first implemented, because back then the
callstack decoding was still performed on the main thread, and not on a
separate, dedicated one.
2022-10-08 13:22:56 +02:00

1184 lines
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#include <limits>
#include <new>
#include <stdio.h>
#include <string.h>
#include "TracyCallstack.hpp"
#include "TracyFastVector.hpp"
#include "TracyStringHelpers.hpp"
#include "../common/TracyAlloc.hpp"
#include "../common/TracyStackFrames.hpp"
#include "TracyDebug.hpp"
#ifdef TRACY_HAS_CALLSTACK
#if TRACY_HAS_CALLSTACK == 1
# ifndef NOMINMAX
# define NOMINMAX
# endif
# include <windows.h>
# include <psapi.h>
# include <algorithm>
# ifdef _MSC_VER
# pragma warning( push )
# pragma warning( disable : 4091 )
# endif
# include <dbghelp.h>
# ifdef _MSC_VER
# pragma warning( pop )
# endif
#elif TRACY_HAS_CALLSTACK == 2 || TRACY_HAS_CALLSTACK == 3 || TRACY_HAS_CALLSTACK == 4 || TRACY_HAS_CALLSTACK == 6
# include "../libbacktrace/backtrace.hpp"
# include <algorithm>
# include <dlfcn.h>
# include <cxxabi.h>
# include <stdlib.h>
# include "TracyFastVector.hpp"
#elif TRACY_HAS_CALLSTACK == 5
# include <dlfcn.h>
# include <cxxabi.h>
#endif
#ifdef TRACY_DBGHELP_LOCK
# include "TracyProfiler.hpp"
# define DBGHELP_INIT TracyConcat( TRACY_DBGHELP_LOCK, Init() )
# define DBGHELP_LOCK TracyConcat( TRACY_DBGHELP_LOCK, Lock() );
# define DBGHELP_UNLOCK TracyConcat( TRACY_DBGHELP_LOCK, Unlock() );
extern "C"
{
void DBGHELP_INIT;
void DBGHELP_LOCK;
void DBGHELP_UNLOCK;
};
#endif
#if TRACY_HAS_CALLSTACK == 2 || TRACY_HAS_CALLSTACK == 3 || TRACY_HAS_CALLSTACK == 4 || TRACY_HAS_CALLSTACK == 5 || TRACY_HAS_CALLSTACK == 6
// If you want to use your own demangling functionality (e.g. for another language),
// define TRACY_DEMANGLE and provide your own implementation of the __tracy_demangle
// function. The input parameter is a function name. The demangle function must
// identify whether this name is mangled, and fail if it is not. Failure is indicated
// by returning nullptr. If demangling succeeds, a pointer to the C string containing
// demangled function must be returned. The demangling function is responsible for
// managing memory for this string. It is expected that it will be internally reused.
// When a call to ___tracy_demangle is made, previous contents of the string memory
// do not need to be preserved. Function may return string of any length, but the
// profiler can choose to truncate it.
extern "C" const char* ___tracy_demangle( const char* mangled );
#ifndef TRACY_DEMANGLE
constexpr size_t ___tracy_demangle_buffer_len = 1024*1024;
char* ___tracy_demangle_buffer;
void ___tracy_init_demangle_buffer()
{
___tracy_demangle_buffer = (char*)tracy::tracy_malloc( ___tracy_demangle_buffer_len );
}
void ___tracy_free_demangle_buffer()
{
tracy::tracy_free( ___tracy_demangle_buffer );
}
extern "C" const char* ___tracy_demangle( const char* mangled )
{
if( !mangled || mangled[0] != '_' ) return nullptr;
if( strlen( mangled ) > ___tracy_demangle_buffer_len ) return nullptr;
int status;
size_t len = ___tracy_demangle_buffer_len;
return abi::__cxa_demangle( mangled, ___tracy_demangle_buffer, &len, &status );
}
#endif
#endif
namespace tracy
{
#if TRACY_HAS_CALLSTACK == 1
enum { MaxCbTrace = 64 };
enum { MaxNameSize = 8*1024 };
int cb_num;
CallstackEntry cb_data[MaxCbTrace];
extern "C"
{
typedef DWORD (__stdcall *t_SymAddrIncludeInlineTrace)( HANDLE hProcess, DWORD64 Address );
typedef BOOL (__stdcall *t_SymQueryInlineTrace)( HANDLE hProcess, DWORD64 StartAddress, DWORD StartContext, DWORD64 StartRetAddress, DWORD64 CurAddress, LPDWORD CurContext, LPDWORD CurFrameIndex );
typedef BOOL (__stdcall *t_SymFromInlineContext)( HANDLE hProcess, DWORD64 Address, ULONG InlineContext, PDWORD64 Displacement, PSYMBOL_INFO Symbol );
typedef BOOL (__stdcall *t_SymGetLineFromInlineContext)( HANDLE hProcess, DWORD64 qwAddr, ULONG InlineContext, DWORD64 qwModuleBaseAddress, PDWORD pdwDisplacement, PIMAGEHLP_LINE64 Line64 );
TRACY_API ___tracy_t_RtlWalkFrameChain ___tracy_RtlWalkFrameChain = 0;
t_SymAddrIncludeInlineTrace _SymAddrIncludeInlineTrace = 0;
t_SymQueryInlineTrace _SymQueryInlineTrace = 0;
t_SymFromInlineContext _SymFromInlineContext = 0;
t_SymGetLineFromInlineContext _SymGetLineFromInlineContext = 0;
}
struct ModuleCache
{
uint64_t start;
uint64_t end;
char* name;
};
static FastVector<ModuleCache>* s_modCache;
struct KernelDriver
{
uint64_t addr;
const char* mod;
const char* path;
};
KernelDriver* s_krnlCache = nullptr;
size_t s_krnlCacheCnt;
void InitCallstackCritical()
{
___tracy_RtlWalkFrameChain = (___tracy_t_RtlWalkFrameChain)GetProcAddress( GetModuleHandleA( "ntdll.dll" ), "RtlWalkFrameChain" );
}
void InitCallstack()
{
_SymAddrIncludeInlineTrace = (t_SymAddrIncludeInlineTrace)GetProcAddress( GetModuleHandleA( "dbghelp.dll" ), "SymAddrIncludeInlineTrace" );
_SymQueryInlineTrace = (t_SymQueryInlineTrace)GetProcAddress( GetModuleHandleA( "dbghelp.dll" ), "SymQueryInlineTrace" );
_SymFromInlineContext = (t_SymFromInlineContext)GetProcAddress( GetModuleHandleA( "dbghelp.dll" ), "SymFromInlineContext" );
_SymGetLineFromInlineContext = (t_SymGetLineFromInlineContext)GetProcAddress( GetModuleHandleA( "dbghelp.dll" ), "SymGetLineFromInlineContext" );
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_INIT;
DBGHELP_LOCK;
#endif
SymInitialize( GetCurrentProcess(), nullptr, true );
SymSetOptions( SYMOPT_LOAD_LINES );
DWORD needed;
LPVOID dev[4096];
if( EnumDeviceDrivers( dev, sizeof(dev), &needed ) != 0 )
{
char windir[MAX_PATH];
if( !GetWindowsDirectoryA( windir, sizeof( windir ) ) ) memcpy( windir, "c:\\windows", 11 );
const auto windirlen = strlen( windir );
const auto sz = needed / sizeof( LPVOID );
s_krnlCache = (KernelDriver*)tracy_malloc( sizeof(KernelDriver) * sz );
int cnt = 0;
for( size_t i=0; i<sz; i++ )
{
char fn[MAX_PATH];
const auto len = GetDeviceDriverBaseNameA( dev[i], fn, sizeof( fn ) );
if( len != 0 )
{
auto buf = (char*)tracy_malloc_fast( len+3 );
buf[0] = '<';
memcpy( buf+1, fn, len );
memcpy( buf+len+1, ">", 2 );
s_krnlCache[cnt] = KernelDriver { (uint64_t)dev[i], buf };
const auto len = GetDeviceDriverFileNameA( dev[i], fn, sizeof( fn ) );
if( len != 0 )
{
char full[MAX_PATH];
char* path = fn;
if( memcmp( fn, "\\SystemRoot\\", 12 ) == 0 )
{
memcpy( full, windir, windirlen );
strcpy( full + windirlen, fn + 11 );
path = full;
}
SymLoadModuleEx( GetCurrentProcess(), nullptr, path, nullptr, (DWORD64)dev[i], 0, nullptr, 0 );
const auto psz = strlen( path );
auto pptr = (char*)tracy_malloc_fast( psz+1 );
memcpy( pptr, path, psz );
pptr[psz] = '\0';
s_krnlCache[cnt].path = pptr;
}
cnt++;
}
}
s_krnlCacheCnt = cnt;
std::sort( s_krnlCache, s_krnlCache + s_krnlCacheCnt, []( const KernelDriver& lhs, const KernelDriver& rhs ) { return lhs.addr > rhs.addr; } );
}
s_modCache = (FastVector<ModuleCache>*)tracy_malloc( sizeof( FastVector<ModuleCache> ) );
new(s_modCache) FastVector<ModuleCache>( 512 );
HANDLE proc = GetCurrentProcess();
HMODULE mod[1024];
if( EnumProcessModules( proc, mod, sizeof( mod ), &needed ) != 0 )
{
const auto sz = needed / sizeof( HMODULE );
for( size_t i=0; i<sz; i++ )
{
MODULEINFO info;
if( GetModuleInformation( proc, mod[i], &info, sizeof( info ) ) != 0 )
{
const auto base = uint64_t( info.lpBaseOfDll );
char name[1024];
const auto res = GetModuleFileNameA( mod[i], name, 1021 );
if( res > 0 )
{
auto ptr = name + res;
while( ptr > name && *ptr != '\\' && *ptr != '/' ) ptr--;
if( ptr > name ) ptr++;
const auto namelen = name + res - ptr;
auto cache = s_modCache->push_next();
cache->start = base;
cache->end = base + info.SizeOfImage;
cache->name = (char*)tracy_malloc_fast( namelen+3 );
cache->name[0] = '[';
memcpy( cache->name+1, ptr, namelen );
cache->name[namelen+1] = ']';
cache->name[namelen+2] = '\0';
}
}
}
}
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_UNLOCK;
#endif
}
void EndCallstack()
{
}
const char* DecodeCallstackPtrFast( uint64_t ptr )
{
static char ret[MaxNameSize];
const auto proc = GetCurrentProcess();
char buf[sizeof( SYMBOL_INFO ) + MaxNameSize];
auto si = (SYMBOL_INFO*)buf;
si->SizeOfStruct = sizeof( SYMBOL_INFO );
si->MaxNameLen = MaxNameSize;
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_LOCK;
#endif
if( SymFromAddr( proc, ptr, nullptr, si ) == 0 )
{
*ret = '\0';
}
else
{
memcpy( ret, si->Name, si->NameLen );
ret[si->NameLen] = '\0';
}
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_UNLOCK;
#endif
return ret;
}
const char* GetKernelModulePath( uint64_t addr )
{
assert( addr >> 63 != 0 );
if( !s_krnlCache ) return nullptr;
auto it = std::lower_bound( s_krnlCache, s_krnlCache + s_krnlCacheCnt, addr, []( const KernelDriver& lhs, const uint64_t& rhs ) { return lhs.addr > rhs; } );
if( it == s_krnlCache + s_krnlCacheCnt ) return nullptr;
return it->path;
}
static const char* GetModuleNameAndPrepareSymbols( uint64_t addr )
{
if( ( addr >> 63 ) != 0 )
{
if( s_krnlCache )
{
auto it = std::lower_bound( s_krnlCache, s_krnlCache + s_krnlCacheCnt, addr, []( const KernelDriver& lhs, const uint64_t& rhs ) { return lhs.addr > rhs; } );
if( it != s_krnlCache + s_krnlCacheCnt )
{
return it->mod;
}
}
return "<kernel>";
}
for( auto& v : *s_modCache )
{
if( addr >= v.start && addr < v.end )
{
return v.name;
}
}
HMODULE mod[1024];
DWORD needed;
HANDLE proc = GetCurrentProcess();
InitRpmalloc();
if( EnumProcessModules( proc, mod, sizeof( mod ), &needed ) != 0 )
{
const auto sz = needed / sizeof( HMODULE );
for( size_t i=0; i<sz; i++ )
{
MODULEINFO info;
if( GetModuleInformation( proc, mod[i], &info, sizeof( info ) ) != 0 )
{
const auto base = uint64_t( info.lpBaseOfDll );
if( addr >= base && addr < base + info.SizeOfImage )
{
char name[1024];
const auto res = GetModuleFileNameA( mod[i], name, 1021 );
if( res > 0 )
{
// since this is the first time we encounter this module, load its symbols (needed for modules loaded after SymInitialize)
SymLoadModuleEx(proc, NULL, name, NULL, (DWORD64)info.lpBaseOfDll, info.SizeOfImage, NULL, 0);
auto ptr = name + res;
while( ptr > name && *ptr != '\\' && *ptr != '/' ) ptr--;
if( ptr > name ) ptr++;
const auto namelen = name + res - ptr;
auto cache = s_modCache->push_next();
cache->start = base;
cache->end = base + info.SizeOfImage;
cache->name = (char*)tracy_malloc_fast( namelen+3 );
cache->name[0] = '[';
memcpy( cache->name+1, ptr, namelen );
cache->name[namelen+1] = ']';
cache->name[namelen+2] = '\0';
return cache->name;
}
}
}
}
}
return "[unknown]";
}
CallstackSymbolData DecodeSymbolAddress( uint64_t ptr )
{
CallstackSymbolData sym;
IMAGEHLP_LINE64 line;
DWORD displacement = 0;
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_LOCK;
#endif
const auto res = SymGetLineFromAddr64( GetCurrentProcess(), ptr, &displacement, &line );
if( res == 0 || line.LineNumber >= 0xF00000 )
{
sym.file = "[unknown]";
sym.line = 0;
sym.needFree = false;
}
else
{
sym.file = CopyString( line.FileName );
sym.line = line.LineNumber;
sym.needFree = true;
}
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_UNLOCK;
#endif
return sym;
}
CallstackSymbolData DecodeCodeAddress( uint64_t ptr )
{
CallstackSymbolData sym = {};
const auto proc = GetCurrentProcess();
bool done = false;
char buf[sizeof( SYMBOL_INFO ) + MaxNameSize];
auto si = (SYMBOL_INFO*)buf;
si->SizeOfStruct = sizeof( SYMBOL_INFO );
si->MaxNameLen = MaxNameSize;
IMAGEHLP_LINE64 line;
DWORD displacement = 0;
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_LOCK;
#endif
#if !defined TRACY_NO_CALLSTACK_INLINES
if( _SymAddrIncludeInlineTrace )
{
DWORD inlineNum = _SymAddrIncludeInlineTrace( proc, ptr );
DWORD ctx = 0;
DWORD idx;
BOOL doInline = FALSE;
if( inlineNum != 0 ) doInline = _SymQueryInlineTrace( proc, ptr, 0, ptr, ptr, &ctx, &idx );
if( doInline )
{
if( _SymGetLineFromInlineContext( proc, ptr, ctx, 0, &displacement, &line ) != 0 )
{
sym.file = CopyString( line.FileName );
sym.line = line.LineNumber;
sym.needFree = true;
done = true;
if( _SymFromInlineContext( proc, ptr, ctx, nullptr, si ) != 0 )
{
sym.symAddr = si->Address;
}
else
{
sym.symAddr = 0;
}
}
}
}
#endif
if( !done )
{
const auto res = SymGetLineFromAddr64( proc, ptr, &displacement, &line );
if( res == 0 || line.LineNumber >= 0xF00000 )
{
sym.file = "[unknown]";
sym.line = 0;
sym.symAddr = 0;
sym.needFree = false;
}
else
{
sym.file = CopyString( line.FileName );
sym.line = line.LineNumber;
sym.needFree = true;
if( SymFromAddr( proc, ptr, nullptr, si ) != 0 )
{
sym.symAddr = si->Address;
}
else
{
sym.symAddr = 0;
}
}
}
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_UNLOCK;
#endif
return sym;
}
CallstackEntryData DecodeCallstackPtr( uint64_t ptr )
{
int write;
const auto proc = GetCurrentProcess();
InitRpmalloc();
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_LOCK;
#endif
const auto moduleName = GetModuleNameAndPrepareSymbols(ptr);
#if !defined TRACY_NO_CALLSTACK_INLINES
BOOL doInline = FALSE;
DWORD ctx = 0;
DWORD inlineNum = 0;
if( _SymAddrIncludeInlineTrace )
{
inlineNum = _SymAddrIncludeInlineTrace( proc, ptr );
if( inlineNum > MaxCbTrace - 1 ) inlineNum = MaxCbTrace - 1;
DWORD idx;
if( inlineNum != 0 ) doInline = _SymQueryInlineTrace( proc, ptr, 0, ptr, ptr, &ctx, &idx );
}
if( doInline )
{
write = inlineNum;
cb_num = 1 + inlineNum;
}
else
#endif
{
write = 0;
cb_num = 1;
}
char buf[sizeof( SYMBOL_INFO ) + MaxNameSize];
auto si = (SYMBOL_INFO*)buf;
si->SizeOfStruct = sizeof( SYMBOL_INFO );
si->MaxNameLen = MaxNameSize;
const auto symValid = SymFromAddr( proc, ptr, nullptr, si ) != 0;
IMAGEHLP_LINE64 line;
DWORD displacement = 0;
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
{
const char* filename;
const auto res = SymGetLineFromAddr64( proc, ptr, &displacement, &line );
if( res == 0 || line.LineNumber >= 0xF00000 )
{
filename = "[unknown]";
cb_data[write].line = 0;
}
else
{
filename = line.FileName;
cb_data[write].line = line.LineNumber;
}
cb_data[write].name = symValid ? CopyStringFast( si->Name, si->NameLen ) : CopyStringFast( moduleName );
cb_data[write].file = CopyStringFast( filename );
if( symValid )
{
cb_data[write].symLen = si->Size;
cb_data[write].symAddr = si->Address;
}
else
{
cb_data[write].symLen = 0;
cb_data[write].symAddr = 0;
}
}
#if !defined TRACY_NO_CALLSTACK_INLINES
if( doInline )
{
for( DWORD i=0; i<inlineNum; i++ )
{
auto& cb = cb_data[i];
const auto symInlineValid = _SymFromInlineContext( proc, ptr, ctx, nullptr, si ) != 0;
const char* filename;
if( _SymGetLineFromInlineContext( proc, ptr, ctx, 0, &displacement, &line ) == 0 )
{
filename = "[unknown]";
cb.line = 0;
}
else
{
filename = line.FileName;
cb.line = line.LineNumber;
}
cb.name = symInlineValid ? CopyStringFast( si->Name, si->NameLen ) : CopyStringFast( moduleName );
cb.file = CopyStringFast( filename );
if( symInlineValid )
{
cb.symLen = si->Size;
cb.symAddr = si->Address;
}
else
{
cb.symLen = 0;
cb.symAddr = 0;
}
ctx++;
}
}
#endif
#ifdef TRACY_DBGHELP_LOCK
DBGHELP_UNLOCK;
#endif
return { cb_data, uint8_t( cb_num ), moduleName };
}
#elif TRACY_HAS_CALLSTACK == 2 || TRACY_HAS_CALLSTACK == 3 || TRACY_HAS_CALLSTACK == 4 || TRACY_HAS_CALLSTACK == 6
enum { MaxCbTrace = 64 };
struct backtrace_state* cb_bts;
int cb_num;
CallstackEntry cb_data[MaxCbTrace];
int cb_fixup;
#ifdef TRACY_DEBUGINFOD
debuginfod_client* s_debuginfod;
struct DebugInfo
{
uint8_t* buildid;
size_t buildid_size;
char* filename;
int fd;
};
FastVector<DebugInfo> s_di_known( 16 );
#endif
#ifdef __linux
struct KernelSymbol
{
uint64_t addr;
const char* name;
const char* mod;
};
KernelSymbol* s_kernelSym = nullptr;
size_t s_kernelSymCnt;
static void InitKernelSymbols()
{
FILE* f = fopen( "/proc/kallsyms", "rb" );
if( !f ) return;
tracy::FastVector<KernelSymbol> tmpSym( 1024 );
size_t linelen = 16 * 1024; // linelen must be big enough to prevent reallocs in getline()
auto linebuf = (char*)tracy_malloc( linelen );
ssize_t sz;
while( ( sz = getline( &linebuf, &linelen, f ) ) != -1 )
{
auto ptr = linebuf;
uint64_t addr = 0;
while( *ptr != ' ' )
{
auto v = *ptr;
if( v >= '0' && v <= '9' )
{
v -= '0';
}
else if( v >= 'a' && v <= 'f' )
{
v -= 'a';
v += 10;
}
else if( v >= 'A' && v <= 'F' )
{
v -= 'A';
v += 10;
}
else
{
assert( false );
}
assert( ( v & ~0xF ) == 0 );
addr <<= 4;
addr |= v;
ptr++;
}
if( addr == 0 ) continue;
ptr++;
if( *ptr != 'T' && *ptr != 't' ) continue;
ptr += 2;
const auto namestart = ptr;
while( *ptr != '\t' && *ptr != '\n' ) ptr++;
const auto nameend = ptr;
const char* modstart = nullptr;
const char* modend;
if( *ptr == '\t' )
{
ptr += 2;
modstart = ptr;
while( *ptr != ']' ) ptr++;
modend = ptr;
}
auto strname = (char*)tracy_malloc_fast( nameend - namestart + 1 );
memcpy( strname, namestart, nameend - namestart );
strname[nameend-namestart] = '\0';
char* strmod = nullptr;
if( modstart )
{
strmod = (char*)tracy_malloc_fast( modend - modstart + 1 );
memcpy( strmod, modstart, modend - modstart );
strmod[modend-modstart] = '\0';
}
auto sym = tmpSym.push_next();
sym->addr = addr;
sym->name = strname;
sym->mod = strmod;
}
tracy_free_fast( linebuf );
fclose( f );
if( tmpSym.empty() ) return;
std::sort( tmpSym.begin(), tmpSym.end(), []( const KernelSymbol& lhs, const KernelSymbol& rhs ) { return lhs.addr > rhs.addr; } );
s_kernelSymCnt = tmpSym.size();
s_kernelSym = (KernelSymbol*)tracy_malloc_fast( sizeof( KernelSymbol ) * s_kernelSymCnt );
memcpy( s_kernelSym, tmpSym.data(), sizeof( KernelSymbol ) * s_kernelSymCnt );
TracyDebug( "Loaded %zu kernel symbols\n", s_kernelSymCnt );
}
#endif
char* NormalizePath( const char* path )
{
if( path[0] != '/' ) return nullptr;
const char* ptr = path;
const char* end = path;
while( *end ) end++;
char* res = (char*)tracy_malloc( end - ptr + 1 );
size_t rsz = 0;
while( ptr < end )
{
const char* next = ptr;
while( next < end && *next != '/' ) next++;
size_t lsz = next - ptr;
switch( lsz )
{
case 2:
if( memcmp( ptr, "..", 2 ) == 0 )
{
const char* back = res + rsz - 1;
while( back > res && *back != '/' ) back--;
rsz = back - res;
ptr = next + 1;
continue;
}
break;
case 1:
if( *ptr == '.' )
{
ptr = next + 1;
continue;
}
break;
case 0:
ptr = next + 1;
continue;
}
if( rsz != 1 ) res[rsz++] = '/';
memcpy( res+rsz, ptr, lsz );
rsz += lsz;
ptr = next + 1;
}
if( rsz == 0 )
{
memcpy( res, "/", 2 );
}
else
{
res[rsz] = '\0';
}
return res;
}
void InitCallstackCritical()
{
}
void InitCallstack()
{
cb_bts = backtrace_create_state( nullptr, 0, nullptr, nullptr );
___tracy_init_demangle_buffer();
#ifdef __linux
InitKernelSymbols();
#endif
#ifdef TRACY_DEBUGINFOD
s_debuginfod = debuginfod_begin();
#endif
}
#ifdef TRACY_DEBUGINFOD
void ClearDebugInfoVector( FastVector<DebugInfo>& vec )
{
for( auto& v : vec )
{
tracy_free( v.buildid );
tracy_free( v.filename );
if( v.fd >= 0 ) close( v.fd );
}
vec.clear();
}
DebugInfo* FindDebugInfo( FastVector<DebugInfo>& vec, const uint8_t* buildid_data, size_t buildid_size )
{
for( auto& v : vec )
{
if( v.buildid_size == buildid_size && memcmp( v.buildid, buildid_data, buildid_size ) == 0 )
{
return &v;
}
}
return nullptr;
}
int GetDebugInfoDescriptor( const char* buildid_data, size_t buildid_size, const char* filename )
{
auto buildid = (uint8_t*)buildid_data;
auto it = FindDebugInfo( s_di_known, buildid, buildid_size );
if( it ) return it->fd >= 0 ? dup( it->fd ) : -1;
int fd = debuginfod_find_debuginfo( s_debuginfod, buildid, buildid_size, nullptr );
it = s_di_known.push_next();
it->buildid_size = buildid_size;
it->buildid = (uint8_t*)tracy_malloc( buildid_size );
memcpy( it->buildid, buildid, buildid_size );
const auto fnsz = strlen( filename ) + 1;
it->filename = (char*)tracy_malloc( fnsz );
memcpy( it->filename, filename, fnsz );
it->fd = fd >= 0 ? fd : -1;
TracyDebug( "DebugInfo descriptor query: %i, fn: %s\n", fd, filename );
return it->fd;
}
const uint8_t* GetBuildIdForImage( const char* image, size_t& size )
{
assert( image );
for( auto& v : s_di_known )
{
if( strcmp( image, v.filename ) == 0 )
{
size = v.buildid_size;
return v.buildid;
}
}
return nullptr;
}
debuginfod_client* GetDebuginfodClient()
{
return s_debuginfod;
}
#endif
void EndCallstack()
{
___tracy_free_demangle_buffer();
#ifdef TRACY_DEBUGINFOD
ClearDebugInfoVector( s_di_known );
debuginfod_end( s_debuginfod );
#endif
}
const char* DecodeCallstackPtrFast( uint64_t ptr )
{
static char ret[1024];
auto vptr = (void*)ptr;
const char* symname = nullptr;
Dl_info dlinfo;
if( dladdr( vptr, &dlinfo ) && dlinfo.dli_sname )
{
symname = dlinfo.dli_sname;
}
if( symname )
{
strcpy( ret, symname );
}
else
{
*ret = '\0';
}
return ret;
}
static int SymbolAddressDataCb( void* data, uintptr_t pc, uintptr_t lowaddr, const char* fn, int lineno, const char* function )
{
auto& sym = *(CallstackSymbolData*)data;
if( !fn )
{
sym.file = "[unknown]";
sym.line = 0;
sym.needFree = false;
}
else
{
sym.file = NormalizePath( fn );
if( !sym.file ) sym.file = CopyString( fn );
sym.line = lineno;
sym.needFree = true;
}
return 1;
}
static void SymbolAddressErrorCb( void* data, const char* /*msg*/, int /*errnum*/ )
{
auto& sym = *(CallstackSymbolData*)data;
sym.file = "[unknown]";
sym.line = 0;
sym.needFree = false;
}
CallstackSymbolData DecodeSymbolAddress( uint64_t ptr )
{
CallstackSymbolData sym;
backtrace_pcinfo( cb_bts, ptr, SymbolAddressDataCb, SymbolAddressErrorCb, &sym );
return sym;
}
static int CodeDataCb( void* data, uintptr_t pc, uintptr_t lowaddr, const char* fn, int lineno, const char* function )
{
if( !fn ) return 1;
const auto fnsz = strlen( fn );
if( fnsz >= s_tracySkipSubframesMinLen )
{
auto ptr = s_tracySkipSubframes;
do
{
if( fnsz >= ptr->len && memcmp( fn + fnsz - ptr->len, ptr->str, ptr->len ) == 0 ) return 0;
ptr++;
}
while( ptr->str );
}
auto& sym = *(CallstackSymbolData*)data;
sym.file = NormalizePath( fn );
if( !sym.file ) sym.file = CopyString( fn );
sym.line = lineno;
sym.needFree = true;
sym.symAddr = lowaddr;
return 1;
}
static void CodeErrorCb( void* /*data*/, const char* /*msg*/, int /*errnum*/ )
{
}
CallstackSymbolData DecodeCodeAddress( uint64_t ptr )
{
CallstackSymbolData sym = { "[unknown]", 0, false, 0 };
backtrace_pcinfo( cb_bts, ptr, CodeDataCb, CodeErrorCb, &sym );
return sym;
}
static int CallstackDataCb( void* /*data*/, uintptr_t pc, uintptr_t lowaddr, const char* fn, int lineno, const char* function )
{
cb_data[cb_num].symLen = 0;
cb_data[cb_num].symAddr = (uint64_t)lowaddr;
if( !fn && !function )
{
const char* symname = nullptr;
auto vptr = (void*)pc;
ptrdiff_t symoff = 0;
Dl_info dlinfo;
if( dladdr( vptr, &dlinfo ) )
{
symname = dlinfo.dli_sname;
symoff = (char*)pc - (char*)dlinfo.dli_saddr;
const char* demangled = ___tracy_demangle( symname );
if( demangled ) symname = demangled;
}
if( !symname ) symname = "[unknown]";
if( symoff == 0 )
{
const auto len = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() );
cb_data[cb_num].name = CopyStringFast( symname, len );
}
else
{
char buf[32];
const auto offlen = sprintf( buf, " + %td", symoff );
const auto namelen = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() - offlen );
auto name = (char*)tracy_malloc_fast( namelen + offlen + 1 );
memcpy( name, symname, namelen );
memcpy( name + namelen, buf, offlen );
name[namelen + offlen] = '\0';
cb_data[cb_num].name = name;
}
cb_data[cb_num].file = CopyStringFast( "[unknown]" );
cb_data[cb_num].line = 0;
}
else
{
if( !fn ) fn = "[unknown]";
if( !function )
{
function = "[unknown]";
}
else
{
const char* demangled = ___tracy_demangle( function );
if( demangled ) function = demangled;
}
const auto len = std::min<size_t>( strlen( function ), std::numeric_limits<uint16_t>::max() );
cb_data[cb_num].name = CopyStringFast( function, len );
cb_data[cb_num].file = NormalizePath( fn );
if( !cb_data[cb_num].file ) cb_data[cb_num].file = CopyStringFast( fn );
cb_data[cb_num].line = lineno;
}
if( ++cb_num >= MaxCbTrace )
{
return 1;
}
else
{
return 0;
}
}
static void CallstackErrorCb( void* /*data*/, const char* /*msg*/, int /*errnum*/ )
{
for( int i=0; i<cb_num; i++ )
{
tracy_free_fast( (void*)cb_data[i].name );
tracy_free_fast( (void*)cb_data[i].file );
}
cb_data[0].name = CopyStringFast( "[error]" );
cb_data[0].file = CopyStringFast( "[error]" );
cb_data[0].line = 0;
cb_num = 1;
}
void SymInfoCallback( void* /*data*/, uintptr_t pc, const char* symname, uintptr_t symval, uintptr_t symsize )
{
cb_data[cb_num-1].symLen = (uint32_t)symsize;
cb_data[cb_num-1].symAddr = (uint64_t)symval;
}
void SymInfoError( void* /*data*/, const char* /*msg*/, int /*errnum*/ )
{
cb_data[cb_num-1].symLen = 0;
cb_data[cb_num-1].symAddr = 0;
}
CallstackEntryData DecodeCallstackPtr( uint64_t ptr )
{
InitRpmalloc();
if( ptr >> 63 == 0 )
{
cb_num = 0;
backtrace_pcinfo( cb_bts, ptr, CallstackDataCb, CallstackErrorCb, nullptr );
assert( cb_num > 0 );
backtrace_syminfo( cb_bts, ptr, SymInfoCallback, SymInfoError, nullptr );
const char* symloc = nullptr;
Dl_info dlinfo;
if( dladdr( (void*)ptr, &dlinfo ) ) symloc = dlinfo.dli_fname;
return { cb_data, uint8_t( cb_num ), symloc ? symloc : "[unknown]" };
}
#ifdef __linux
else if( s_kernelSym )
{
auto it = std::lower_bound( s_kernelSym, s_kernelSym + s_kernelSymCnt, ptr, []( const KernelSymbol& lhs, const uint64_t& rhs ) { return lhs.addr > rhs; } );
if( it != s_kernelSym + s_kernelSymCnt )
{
cb_data[0].name = CopyStringFast( it->name );
cb_data[0].file = CopyStringFast( "<kernel>" );
cb_data[0].line = 0;
cb_data[0].symLen = 0;
cb_data[0].symAddr = it->addr;
return { cb_data, 1, it->mod ? it->mod : "<kernel>" };
}
}
#endif
cb_data[0].name = CopyStringFast( "[unknown]" );
cb_data[0].file = CopyStringFast( "<kernel>" );
cb_data[0].line = 0;
cb_data[0].symLen = 0;
cb_data[0].symAddr = 0;
return { cb_data, 1, "<kernel>" };
}
#elif TRACY_HAS_CALLSTACK == 5
void InitCallstackCritical()
{
}
void InitCallstack()
{
___tracy_init_demangle_buffer();
}
void EndCallstack()
{
___tracy_free_demangle_buffer();
}
const char* DecodeCallstackPtrFast( uint64_t ptr )
{
static char ret[1024];
auto vptr = (void*)ptr;
const char* symname = nullptr;
Dl_info dlinfo;
if( dladdr( vptr, &dlinfo ) && dlinfo.dli_sname )
{
symname = dlinfo.dli_sname;
}
if( symname )
{
strcpy( ret, symname );
}
else
{
*ret = '\0';
}
return ret;
}
CallstackSymbolData DecodeSymbolAddress( uint64_t ptr )
{
const char* symloc = nullptr;
Dl_info dlinfo;
if( dladdr( (void*)ptr, &dlinfo ) ) symloc = dlinfo.dli_fname;
if( !symloc ) symloc = "[unknown]";
return CallstackSymbolData { symloc, 0, false, 0 };
}
CallstackSymbolData DecodeCodeAddress( uint64_t ptr )
{
return DecodeSymbolAddress( ptr );
}
CallstackEntryData DecodeCallstackPtr( uint64_t ptr )
{
static CallstackEntry cb;
cb.line = 0;
const char* symname = nullptr;
const char* symloc = nullptr;
auto vptr = (void*)ptr;
ptrdiff_t symoff = 0;
void* symaddr = nullptr;
Dl_info dlinfo;
if( dladdr( vptr, &dlinfo ) )
{
symloc = dlinfo.dli_fname;
symname = dlinfo.dli_sname;
symoff = (char*)ptr - (char*)dlinfo.dli_saddr;
symaddr = dlinfo.dli_saddr;
const char* demangled = ___tracy_demangle( symname );
if( demangled ) symname = demangled;
}
if( !symname ) symname = "[unknown]";
if( !symloc ) symloc = "[unknown]";
if( symoff == 0 )
{
const auto len = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() );
cb.name = CopyString( symname, len );
}
else
{
char buf[32];
const auto offlen = sprintf( buf, " + %td", symoff );
const auto namelen = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() - offlen );
auto name = (char*)tracy_malloc( namelen + offlen + 1 );
memcpy( name, symname, namelen );
memcpy( name + namelen, buf, offlen );
name[namelen + offlen] = '\0';
cb.name = name;
}
cb.file = CopyString( "[unknown]" );
cb.symLen = 0;
cb.symAddr = (uint64_t)symaddr;
return { &cb, 1, symloc };
}
#endif
}
#endif
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