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* strace.cc (attach_process): Use NT_SUCCESS to figure out if 

NtSetInformationProcess succeeded.
(handle_output_debug_string): Put back DebugActiveProcess since it seems to
still be needed (on my system at least).  Detect new format
_STRACE_INTERFACE_ACTIVATE_ADDR which informs whether this is a forked process
or not.  Use that to decide if forkdebug should be handled.
This commit is contained in:
Christopher Faylor 2011-11-24 21:54:41 +00:00
parent e553226cfa
commit 505bce274f
2 changed files with 16 additions and 3 deletions
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9
winsup/utils/ChangeLog
View File

@ -1,3 +1,12 @@
2011-11-24 Christopher Faylor <me.cygwin2011@cgf.cx>
* strace.cc (attach_process): Use NT_SUCCESS to figure out if
NtSetInformationProcess succeeded.
(handle_output_debug_string): Put back DebugActiveProcess since it
seems to still be needed (on my system at least). Detect new format
_STRACE_INTERFACE_ACTIVATE_ADDR which informs whether this is a forked
process or not. Use that to decide if forkdebug should be handled.
2011-11-14 Christopher Faylor <me.cygwin2011@cgf.cx>
* strace.cc (handle_output_debug_string): Disable code which attempted

10
winsup/utils/strace.cc
View File

@ -314,8 +314,8 @@ attach_process (pid_t pid)
/* Try to turn off DEBUG_ONLY_THIS_PROCESS so we can follow forks */
/* This is only supported on XP and later */
ULONG DebugFlags = DEBUG_PROCESS_DETACH_ON_EXIT;
NTSTATUS status = NtSetInformationProcess(h, ProcessDebugFlags, &DebugFlags, sizeof(DebugFlags));
if (status)
NTSTATUS status = NtSetInformationProcess (h, ProcessDebugFlags, &DebugFlags, sizeof (DebugFlags));
if (!NT_SUCCESS (status))
warn (0, "Could not clear DEBUG_ONLY_THIS_PROCESS (%x), will not trace child processes", status);
CloseHandle(h);
@ -486,12 +486,16 @@ handle_output_debug_string (DWORD id, LPVOID p, unsigned mask, FILE *ofile)
if (special == _STRACE_CHILD_PID)
{
DebugActiveProcess (n);
return;
}
if (special == _STRACE_INTERFACE_ACTIVATE_ADDR)
{
if (!WriteProcessMemory (hchild, (LPVOID) n, &strace_active,
s = strtok (NULL, " ");
if (*s && *s == '1' && !forkdebug)
/* don't activate since we are not following forks */;
else if (!WriteProcessMemory (hchild, (LPVOID) n, &strace_active,
sizeof (strace_active), &nbytes))
error (0, "couldn't write strace flag to subprocess at %p, "
"windows error %d", n, GetLastError ());