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Use proper API to read /proc/mounts.

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This commit is contained in:
Bartosz Taudul
2025-11-13 19:40:28 +01:00
parent d70c7fb4c3
commit 5f4cccaa00
1 changed files with 12 additions and 33 deletions
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45
public/client/TracySysTrace.cpp
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@@ -610,6 +610,7 @@ void SysTraceGetExternalName( uint64_t thread, const char*& threadName, const ch
# include <fcntl.h>
# include <inttypes.h>
# include <limits>
# include <mntent.h>
# include <poll.h>
# include <stdio.h>
# include <stdlib.h>
@@ -774,45 +775,23 @@ static const char* ReadFile( const char* base, const char* path )
static char* GetTraceFsPath()
{
int fd = open( "/proc/mounts", O_RDONLY );
if( fd < 0 ) return nullptr;
auto f = setmntent( "/proc/mounts", "r" );
if( !f ) return nullptr;
constexpr size_t BufSize = 64 * 1024;
auto tmp = (char*)tracy_malloc( BufSize );
const auto cnt = read( fd, tmp, BufSize-1 );
close( fd );
if( cnt < 0 )
char* ret = nullptr;
while( auto ent = getmntent( f ) )
{
tracy_free( tmp );
return nullptr;
}
tmp[cnt] = '\0';
auto ptr = tmp;
while( *ptr )
{
if( strncmp( ptr, "tracefs ", 8 ) == 0 )
if( strcmp( ent->mnt_fsname, "tracefs" ) == 0 )
{
ptr += 8;
auto end = ptr;
while( *end && *end != ' ' ) end++;
if( !*end )
{
tracy_free( tmp );
return nullptr;
}
const auto len = end - ptr;
auto ret = (char*)tracy_malloc( len+1 );
memcpy( ret, ptr, len );
auto len = strlen( ent->mnt_dir );
ret = (char*)tracy_malloc( len + 1 );
memcpy( ret, ent->mnt_dir, len );
ret[len] = '\0';
return ret;
break;
}
while( *ptr && *ptr != '\n' ) ptr++;
if( *ptr ) ptr++;
}
tracy_free( tmp );
return nullptr;
endmntent( f );
return ret;
}
bool SysTraceStart( int64_t& samplingPeriod )