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gdbstub: Introduce gdbserver_fork_start() 

The upcoming follow-fork-mode child support requires knowing when
fork() is about to happen in order to initialize its state. Add a hook
for that.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240219141628.246823-5-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-6-alex.bennee@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2024-03-05 12:09:41 +00:00 committed by Alex Bennée
parent d4e1369abe
commit 3d6ed98da8
4 changed files with 11 additions and 0 deletions
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1
bsd-user/main.c
View File

@ -113,6 +113,7 @@ void fork_start(void)
start_exclusive(); start_exclusive();
cpu_list_lock(); cpu_list_lock();
mmap_fork_start(); mmap_fork_start();
gdbserver_fork_start();
} }
void fork_end(int child) void fork_end(int child)

4
gdbstub/user.c
View File

@ -356,6 +356,10 @@ int gdbserver_start(const char *port_or_path)
return -1; return -1;
} }
void gdbserver_fork_start(void)
{
}
static void disable_gdbstub(CPUState *thread_cpu) static void disable_gdbstub(CPUState *thread_cpu)
{ {
CPUState *cpu; CPUState *cpu;

5
include/gdbstub/user.h
View File

@ -45,6 +45,11 @@ static inline int gdb_handlesig(CPUState *cpu, int sig)
*/ */
void gdb_signalled(CPUArchState *as, int sig); void gdb_signalled(CPUArchState *as, int sig);
/**
* gdbserver_fork_start() - inform gdb of the upcoming fork()
*/
void gdbserver_fork_start(void);
/** /**
* gdbserver_fork() - disable gdb stub for child processes. * gdbserver_fork() - disable gdb stub for child processes.
* @cs: CPU * @cs: CPU

1
linux-user/main.c
View File

@ -145,6 +145,7 @@ void fork_start(void)
mmap_fork_start(); mmap_fork_start();
cpu_list_lock(); cpu_list_lock();
qemu_plugin_user_prefork_lock(); qemu_plugin_user_prefork_lock();
gdbserver_fork_start();
} }
void fork_end(int child) void fork_end(int child)