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Correctly handle cases when a thread single-steps into the kernel as it can

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happen on syscalls or "int" instructions. The debug exception handler sets
the thread debug flags B_THREAD_DEBUG_STOP and
B_THREAD_DEBUG_NOTIFY_SINGLE_STEP (new) and lets the thread continue. Before
leaving the kernel the thread is stopped and a single-step notification is
sent. Fixes #3487.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35620 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2010-02-25 20:20:16 +00:00
parent a304e08905
commit 8b3d3d8a15
3 changed files with 63 additions and 13 deletions
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headers/private/kernel/user_debugger.h
+9 -8
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@@ -154,17 +154,18 @@ enum {
// thread debugging flags (user-specifiable flags are in <debugger.h>)
enum {
B_THREAD_DEBUG_INITIALIZED = 0x0001,
B_THREAD_DEBUG_DYING = 0x0002,
B_THREAD_DEBUG_STOP = 0x0004,
B_THREAD_DEBUG_STOPPED = 0x0008,
B_THREAD_DEBUG_SINGLE_STEP = 0x0010,
B_THREAD_DEBUG_INITIALIZED = 0x0001,
B_THREAD_DEBUG_DYING = 0x0002,
B_THREAD_DEBUG_STOP = 0x0004,
B_THREAD_DEBUG_STOPPED = 0x0008,
B_THREAD_DEBUG_SINGLE_STEP = 0x0010,
B_THREAD_DEBUG_NOTIFY_SINGLE_STEP = 0x0020,
B_THREAD_DEBUG_NUB_THREAD = 0x0020, // marks the nub thread
B_THREAD_DEBUG_NUB_THREAD = 0x0040, // marks the nub thread
B_THREAD_DEBUG_KERNEL_FLAG_MASK = 0xffff,
B_THREAD_DEBUG_KERNEL_FLAG_MASK = 0xffff,
B_THREAD_DEBUG_DEFAULT_FLAGS = 0,
B_THREAD_DEBUG_DEFAULT_FLAGS = 0,
};
// messages sent from the debug nub thread to a debugged thread