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plugins: add helper functions for coverage plugins

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Which provide information about:
- start_code.
- end_code.
- entry.
- path to the executable binary.

Signed-off-by: Ivanov Arkady <arkadiy.ivanov@ispras.ru>
Message-Id: <163491883461.304355.8210754161847179432.stgit@pc-System-Product-Name>
[AJB: reword title, better descriptions, defaults, rm export, fix include]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220204204335.1689602-22-alex.bennee@linaro.org>
This commit is contained in:
Ivanov Arkady 2022-02-04 20:43:30 +00:00 committed by Alex Bennée
parent 126d4123c5
commit 91d4032710
3 changed files with 86 additions and 0 deletions
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34
include/qemu/qemu-plugin.h
View File

@ -590,4 +590,38 @@ void qemu_plugin_outs(const char *string);
*/
bool qemu_plugin_bool_parse(const char *name, const char *val, bool *ret);
/**
* qemu_plugin_path_to_binary() - path to binary file being executed
*
* Return a string representing the path to the binary. For user-mode
* this is the main executable. For system emulation we currently
* return NULL. The user should g_free() the string once no longer
* needed.
*/
const char *qemu_plugin_path_to_binary(void);
/**
* qemu_plugin_start_code() - returns start of text segment
*
* Returns the nominal start address of the main text segment in
* user-mode. Currently returns 0 for system emulation.
*/
uint64_t qemu_plugin_start_code(void);
/**
* qemu_plugin_end_code() - returns end of text segment
*
* Returns the nominal end address of the main text segment in
* user-mode. Currently returns 0 for system emulation.
*/
uint64_t qemu_plugin_end_code(void);
/**
* qemu_plugin_entry_code() - returns start address for module
*
* Returns the nominal entry address of the main text segment in
* user-mode. Currently returns 0 for system emulation.
*/
uint64_t qemu_plugin_entry_code(void);
#endif /* QEMU_PLUGIN_API_H */

48
plugins/api.c
View File

@ -44,6 +44,11 @@
#ifndef CONFIG_USER_ONLY
#include "qemu/plugin-memory.h"
#include "hw/boards.h"
#else
#include "qemu.h"
#ifdef CONFIG_LINUX
#include "loader.h"
#endif
#endif
/* Uninstall and Reset handlers */
@ -391,3 +396,46 @@ bool qemu_plugin_bool_parse(const char *name, const char *value, bool *ret)
{
return name && value && qapi_bool_parse(name, value, ret, NULL);
}
/*
* Binary path, start and end locations
*/
const char *qemu_plugin_path_to_binary(void)
{
char *path = NULL;
#ifdef CONFIG_USER_ONLY
TaskState *ts = (TaskState *) current_cpu->opaque;
path = g_strdup(ts->bprm->filename);
#endif
return path;
}
uint64_t qemu_plugin_start_code(void)
{
uint64_t start = 0;
#ifdef CONFIG_USER_ONLY
TaskState *ts = (TaskState *) current_cpu->opaque;
start = ts->info->start_code;
#endif
return start;
}
uint64_t qemu_plugin_end_code(void)
{
uint64_t end = 0;
#ifdef CONFIG_USER_ONLY
TaskState *ts = (TaskState *) current_cpu->opaque;
end = ts->info->end_code;
#endif
return end;
}
uint64_t qemu_plugin_entry_code(void)
{
uint64_t entry = 0;
#ifdef CONFIG_USER_ONLY
TaskState *ts = (TaskState *) current_cpu->opaque;
entry = ts->info->entry;
#endif
return entry;
}

4
plugins/qemu-plugins.symbols
View File

@ -1,5 +1,7 @@
{
qemu_plugin_bool_parse;
qemu_plugin_end_code;
qemu_plugin_entry_code;
qemu_plugin_get_hwaddr;
qemu_plugin_hwaddr_device_name;
qemu_plugin_hwaddr_is_io;
@ -17,6 +19,7 @@
qemu_plugin_n_max_vcpus;
qemu_plugin_n_vcpus;
qemu_plugin_outs;
qemu_plugin_path_to_binary;
qemu_plugin_register_atexit_cb;
qemu_plugin_register_flush_cb;
qemu_plugin_register_vcpu_exit_cb;
@ -33,6 +36,7 @@
qemu_plugin_register_vcpu_tb_exec_inline;
qemu_plugin_register_vcpu_tb_trans_cb;
qemu_plugin_reset;
qemu_plugin_start_code;
qemu_plugin_tb_get_insn;
qemu_plugin_tb_n_insns;
qemu_plugin_tb_vaddr;